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annotate src/atomic/win32/SDL_atomic.c @ 3583:65f66674b7fb

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Allocate memory only if we're going to overwrite an environment variable
author Sam Lantinga <slouken@libsdl.org>
date Wed, 16 Dec 2009 16:08:17 +0000
parents 3889325ca987
children f7b03b6838cb
rev   line source
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3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21
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22 Contributed by Bob Pendleton, bob@pendleton.com
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23 */
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24
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25 #include "SDL_stdinc.h"
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26 #include "SDL_atomic.h"
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27
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28 #define WIN32_LEAN_AND_MEAN
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29 #include <windows.h>
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30
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31 #include "SDL_error.h"
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32
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33 /*
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34 This file provides 32, and 64 bit atomic operations. If the
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35 operations are provided by the native hardware and operating system
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36 they are used. If they are not then the operations are emulated
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37 using the SDL spin lock operations. If spin lock can not be
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38 implemented then these functions must fail.
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39 */
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40
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41 /*
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42 WIN32 VERSION.
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43
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44 This makes use of native Windows atomic operations.
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45 */
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46
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47 /*
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48 Native spinlock routines. Because this is the dummy implementation
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49 these will always call SDL_SetError() and do nothing.
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50 */
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51
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52 void
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53 SDL_AtomicLock(SDL_SpinLock *lock)
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54 {
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55 long volatile * l = (long volatile *)lock;
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56 Uint32 old = 0;
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57 Uint32 new = 1;
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58
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59 old = InterlockedExchange(l, new);
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60 while(1 == old)
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61 {
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62 old = InterlockedExchange(l, new);
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63 }
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64 }
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65
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66 void
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67 SDL_AtomicUnlock(SDL_SpinLock *lock)
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68 {
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69 long volatile * l = (long volatile *)lock;
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70 Uint32 new = 0;
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71
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72 InterlockedExchange(l, new);
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73 }
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74
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75 /*
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76 Note that platform specific versions can be built from this version
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77 by changing the #undefs to #defines and adding platform specific
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78 code.
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79 */
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80
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81 #define nativeTestThenSet32
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82 #define nativeClear32
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83 #define nativeFetchThenIncrement32
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84 #define nativeFetchThenDecrement32
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85 #define nativeFetchThenAdd32
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86 #define nativeFetchThenSubtract32
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87 #define nativeIncrementThenFetch32
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88 #define nativeDecrementThenFetch32
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89 #define nativeAddThenFetch32
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90 #define nativeSubtractThenFetch32
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91
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92 #undef nativeTestThenSet64
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93 #undef nativeClear64
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94 #undef nativeFetchThenIncrement64
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95 #undef nativeFetchThenDecrement64
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96 #undef nativeFetchThenAdd64
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97 #undef nativeFetchThenSubtract64
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98 #undef nativeIncrementThenFetch64
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99 #undef nativeDecrementThenFetch64
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100 #undef nativeAddThenFetch64
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101 #undef nativeSubtractThenFetch64
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102
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103 /*
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104 If any of the operations are not provided then we must emulate some
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105 of them. That means we need a nice implementation of spin locks
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106 that avoids the "one big lock" problem. We use a vector of spin
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107 locks and pick which one to use based on the address of the operand
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108 of the function.
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109
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110 To generate the index of the lock we first shift by 3 bits to get
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111 rid on the zero bits that result from 32 and 64 bit allignment of
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112 data. We then mask off all but 5 bits and use those 5 bits as an
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113 index into the table.
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114
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115 Picking the lock this way insures that accesses to the same data at
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116 the same time will go to the same lock. OTOH, accesses to different
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117 data have only a 1/32 chance of hitting the same lock. That should
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118 pretty much eliminate the chances of several atomic operations on
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119 different data from waiting on the same "big lock". If it isn't
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120 then the table of locks can be expanded to a new size so long as
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121 the new size is a power of two.
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122 */
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123
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124 static SDL_SpinLock locks[32] = {
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125 0, 0, 0, 0, 0, 0, 0, 0,
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126 0, 0, 0, 0, 0, 0, 0, 0,
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127 0, 0, 0, 0, 0, 0, 0, 0,
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128 0, 0, 0, 0, 0, 0, 0, 0,
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129 };
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130
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131 static __inline__ void
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132 privateWaitLock(volatile void *ptr)
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133 {
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134 #if SIZEOF_VOIDP == 4
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135 Uint32 index = ((((Uint32)ptr) >> 3) & 0x1f);
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136 #elif SIZEOF_VOIDP == 8
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137 Uint64 index = ((((Uint64)ptr) >> 3) & 0x1f);
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138 #endif
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139
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140 SDL_AtomicLock(&locks[index]);
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141 }
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142
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143 static __inline__ void
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144 privateUnlock(volatile void *ptr)
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145 {
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146 #if SIZEOF_VOIDP == 4
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147 Uint32 index = ((((Uint32)ptr) >> 3) & 0x1f);
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148 #elif SIZEOF_VOIDP == 8
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149 Uint64 index = ((((Uint64)ptr) >> 3) & 0x1f);
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150 #endif
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151
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152 SDL_AtomicUnlock(&locks[index]);
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153 }
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154
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155 /* 32 bit atomic operations */
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156
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157 SDL_bool
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158 SDL_AtomicTestThenSet32(volatile Uint32 * ptr)
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159 {
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160 #ifdef nativeTestThenSet32
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161 long volatile * p = (long volatile *)ptr;
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162 Uint32 new = 1;
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163
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164 return 0 == InterlockedExchange(p, new);
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165 #else
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166 SDL_bool result = SDL_FALSE;
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167
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168 privateWaitLock(ptr);
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169 result = (*ptr == 0);
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170 if (result)
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171 {
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172 *ptr = 1;
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173 }
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174 privateUnlock(ptr);
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175
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176 return result;
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177 #endif
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178 }
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179
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180 void
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181 SDL_AtomicClear32(volatile Uint32 * ptr)
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182 {
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183 #ifdef nativeClear32
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184 long volatile * p = (long volatile *)ptr;
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185 Uint32 new = 0;
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186
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187 InterlockedExchange(p, new);
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188 #else
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189 privateWaitLock(ptr);
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190 *ptr = 0;
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191 privateUnlock(ptr);
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192
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193 return;
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194 #endif
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195 }
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196
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197 Uint32
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198 SDL_AtomicFetchThenIncrement32(volatile Uint32 * ptr)
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199 {
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200 #ifdef nativeFetchThenIncrement32
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201 long volatile * p = (long volatile *)ptr;
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202
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203 return InterlockedExchangeAdd(p, 1);
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204 #else
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205 Uint32 tmp = 0;
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206
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207 privateWaitLock(ptr);
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208 tmp = *ptr;
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209 (*ptr)+= 1;
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210 privateUnlock(ptr);
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211
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212 return tmp;
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213 #endif
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214 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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215
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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216 Uint32
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217 SDL_AtomicFetchThenDecrement32(volatile Uint32 * ptr)
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218 {
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219 #ifdef nativeFetchThenDecrement32
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220 long volatile * p = (long volatile *)ptr;
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221
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222 return InterlockedExchangeAdd(p, -1);
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223 #else
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224 Uint32 tmp = 0;
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225
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226 privateWaitLock(ptr);
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227 tmp = *ptr;
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228 (*ptr) -= 1;
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229 privateUnlock(ptr);
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230
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231 return tmp;
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232 #endif
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233 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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234
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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235 Uint32
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236 SDL_AtomicFetchThenAdd32(volatile Uint32 * ptr, Uint32 value)
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237 {
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238 #ifdef nativeFetchThenAdd32
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239 long volatile * p = (long volatile *)ptr;
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240
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241 return InterlockedExchangeAdd(p, value);
3202
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242 #else
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243 Uint32 tmp = 0;
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244
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245 privateWaitLock(ptr);
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diff changeset
246 tmp = *ptr;
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247 (*ptr)+= value;
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diff changeset
248 privateUnlock(ptr);
3202
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249
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diff changeset
250 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
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diff changeset
251 #endif
3199
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parents:
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252 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
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253
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
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254 Uint32
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255 SDL_AtomicFetchThenSubtract32(volatile Uint32 * ptr, Uint32 value)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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parents:
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256 {
3202
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diff changeset
257 #ifdef nativeFetchThenSubtract32
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258 long volatile * p = (long volatile *)ptr;
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259
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diff changeset
260 return InterlockedExchangeAdd(p, (0 - value));
3202
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diff changeset
261 #else
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diff changeset
262 Uint32 tmp = 0;
3202
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263
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parents: 3212
diff changeset
264 privateWaitLock(ptr);
3202
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diff changeset
265 tmp = *ptr;
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parents: 3199
diff changeset
266 (*ptr)-= value;
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diff changeset
267 privateUnlock(ptr);
3202
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diff changeset
268
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Bob Pendleton <bob@pendleton.com>
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diff changeset
269 return tmp;
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parents: 3199
diff changeset
270 #endif
3199
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Bob Pendleton <bob@pendleton.com>
parents:
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271 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
272
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
273 Uint32
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Bob Pendleton <bob@pendleton.com>
parents: 3212
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274 SDL_AtomicIncrementThenFetch32(volatile Uint32 * ptr)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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parents:
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275 {
3202
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diff changeset
276 #ifdef nativeIncrementThenFetch32
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277 long volatile * p = (LONG volatile *)ptr;
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diff changeset
278
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279 return InterlockedIncrement(p);
3202
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diff changeset
280 #else
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281 Uint32 tmp = 0;
3202
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282
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diff changeset
283 privateWaitLock(ptr);
3202
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diff changeset
284 (*ptr)+= 1;
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diff changeset
285 tmp = *ptr;
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Bob Pendleton <bob@pendleton.com>
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286 privateUnlock(ptr);
3202
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diff changeset
287
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
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diff changeset
288 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
289 #endif
3199
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Bob Pendleton <bob@pendleton.com>
parents:
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290 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
291
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
292 Uint32
3261
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293 SDL_AtomicDecrementThenFetch32(volatile Uint32 * ptr)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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parents:
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294 {
3202
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diff changeset
295 #ifdef nativeDecrementThenFetch32
3306
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diff changeset
296 long volatile * p = (LONG volatile *)ptr;
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297
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diff changeset
298 return InterlockedDecrement(p);
3202
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diff changeset
299 #else
3212
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Bob Pendleton <bob@pendleton.com>
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diff changeset
300 Uint32 tmp = 0;
3202
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diff changeset
301
3261
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Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
302 privateWaitLock(ptr);
3202
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Bob Pendleton <bob@pendleton.com>
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diff changeset
303 (*ptr)-= 1;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
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diff changeset
304 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
305 privateUnlock(ptr);
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
306
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
307 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
308 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
309 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
310
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
311 Uint32
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
312 SDL_AtomicAddThenFetch32(volatile Uint32 * ptr, Uint32 value)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
313 {
3202
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diff changeset
314 #ifdef nativeAddThenFetch32
3306
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diff changeset
315 long volatile * p = (long volatile *)ptr;
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Bob Pendleton <bob@pendleton.com>
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diff changeset
316
a8ec88ff18c7 This version actaully should work on Windows.
Bob Pendleton <bob@pendleton.com>
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diff changeset
317 return InterlockedExchangeAdd(p, value) + value;
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
318 #else
3212
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Bob Pendleton <bob@pendleton.com>
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diff changeset
319 Uint32 tmp = 0;
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
320
3261
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Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
321 privateWaitLock(ptr);
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
322 (*ptr)+= value;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
323 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
324 privateUnlock(ptr);
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
325
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
326 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
327 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
328 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
329
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
330 Uint32
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
331 SDL_AtomicSubtractThenFetch32(volatile Uint32 * ptr, Uint32 value)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
332 {
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
333 #ifdef nativeSubtractThenFetch32
3306
a8ec88ff18c7 This version actaully should work on Windows.
Bob Pendleton <bob@pendleton.com>
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diff changeset
334 long volatile * p = (long volatile *)ptr;
a8ec88ff18c7 This version actaully should work on Windows.
Bob Pendleton <bob@pendleton.com>
parents: 3261
diff changeset
335
a8ec88ff18c7 This version actaully should work on Windows.
Bob Pendleton <bob@pendleton.com>
parents: 3261
diff changeset
336 return InterlockedExchangeAdd(p, (0 - value)) - value;
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
337 #else
3212
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Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
338 Uint32 tmp = 0;
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
339
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
340 privateWaitLock(ptr);
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
341 (*ptr)-= value;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
342 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
343 privateUnlock(ptr);
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
344
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
345 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
346 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
347 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
348
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
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diff changeset
349 /* 64 bit atomic operations */
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
350 #ifdef SDL_HAS_64BIT_TYPE
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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parents:
diff changeset
351
3261
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Bob Pendleton <bob@pendleton.com>
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diff changeset
352 SDL_bool
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
353 SDL_AtomicTestThenSet64(volatile Uint64 * ptr)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
354 {
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
355 #ifdef nativeTestThenSet64
3202
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parents: 3199
diff changeset
356 #else
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Bob Pendleton <bob@pendleton.com>
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diff changeset
357 SDL_bool result = SDL_FALSE;
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parents: 3199
diff changeset
358
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
359 privateWaitLock(ptr);
3202
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
360 result = (*ptr == 0);
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
361 if (result)
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Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
362 {
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
363 *ptr = 1;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
364 }
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
365 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
366
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
367 return result;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
368 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
369 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
370
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
371 void
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
372 SDL_AtomicClear64(volatile Uint64 * ptr)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
373 {
3202
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Bob Pendleton <bob@pendleton.com>
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diff changeset
374 #ifdef nativeClear64
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Bob Pendleton <bob@pendleton.com>
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diff changeset
375 #else
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
376 privateWaitLock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
377 *ptr = 0;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
378 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
379
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
380 return;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
381 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
382 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
383
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
384 Uint64
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
385 SDL_AtomicFetchThenIncrement64(volatile Uint64 * ptr)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
386 {
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
387 #ifdef nativeFetchThenIncrement64
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
388 #else
3212
759032c318d8 This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
389 Uint64 tmp = 0;
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
390
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
391 privateWaitLock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
392 tmp = *ptr;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
393 (*ptr)+= 1;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
394 privateUnlock(ptr);
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
395
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
396 return tmp;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
397 #endif
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
398 }
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
399
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
400 Uint64
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
401 SDL_AtomicFetchThenDecrement64(volatile Uint64 * ptr)
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
402 {
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
403 #ifdef nativeFetchThenDecrement64
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
404 #else
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
405 Uint64 tmp = 0;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
406
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
407 privateWaitLock(ptr);
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
408 tmp = *ptr;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
409 (*ptr) -= 1;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
410 privateUnlock(ptr);
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
411
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
412 return tmp;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
413 #endif
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
414 }
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
415
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
416 Uint64
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
417 SDL_AtomicFetchThenAdd64(volatile Uint64 * ptr, Uint64 value)
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
418 {
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
419 #ifdef nativeFetchThenAdd64
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
420 #else
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
421 Uint64 tmp = 0;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
422
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
423 privateWaitLock(ptr);
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
424 tmp = *ptr;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
425 (*ptr)+= value;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
426 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
427
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
428 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
429 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
430 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
431
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
432 Uint64
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
433 SDL_AtomicFetchThenSubtract64(volatile Uint64 * ptr, Uint64 value)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
434 {
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
435 #ifdef nativeFetchThenSubtract64
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
436 #else
3212
759032c318d8 This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
437 Uint64 tmp = 0;
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
438
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
439 privateWaitLock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
440 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
441 (*ptr)-= value;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
442 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
443
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
444 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
445 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
446 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
447
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
448 Uint64
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
449 SDL_AtomicIncrementThenFetch64(volatile Uint64 * ptr)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
450 {
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
451 #ifdef nativeIncrementThenFetch64
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
452 #else
3212
759032c318d8 This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
453 Uint64 tmp = 0;
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
454
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
455 privateWaitLock(ptr);
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
456 (*ptr)+= 1;
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
457 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
458 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
459
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
460 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
461 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
462 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
463
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
464 Uint64
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
465 SDL_AtomicDecrementThenFetch64(volatile Uint64 * ptr)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
466 {
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
467 #ifdef nativeDecrementThenFetch64
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
468 #else
3212
759032c318d8 This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
469 Uint64 tmp = 0;
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
470
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
471 privateWaitLock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
472 (*ptr)-= 1;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
473 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
474 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
475
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
476 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
477 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
478 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
479
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
480 Uint64
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
481 SDL_AtomicAddThenFetch64(volatile Uint64 * ptr, Uint64 value)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
482 {
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
483 #ifdef nativeAddThenFetch64
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
484 #else
3212
759032c318d8 This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
485 Uint64 tmp = 0;
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
486
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
487 privateWaitLock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
488 (*ptr)+= value;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
489 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
490 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
491
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
492 return tmp;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
493 #endif
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
494 }
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
495
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
496 Uint64
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
497 SDL_AtomicSubtractThenFetch64(volatile Uint64 * ptr, Uint64 value)
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
498 {
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
499 #ifdef nativeSubtractThenFetch64
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
500 #else
3212
759032c318d8 This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
501 Uint64 tmp = 0;
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3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
502
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
503 privateWaitLock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
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504 (*ptr)-= value;
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
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505 tmp = *ptr;
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3212
diff changeset
506 privateUnlock(ptr);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
507
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
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508 return tmp;
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3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
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509 #endif
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
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510 }
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3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
511 #endif
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
512