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annotate src/events/SDL_events.c @ 5125:dc0dfdd58f27

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Removed completely non-portable event thread hack. Next I'll be working on generalizing the event sources and making the event queue lock-free. :)
author Sam Lantinga <slouken@libsdl.org>
date Thu, 27 Jan 2011 22:44:08 -0800
parents 481dabb098ef
children 3052772b59db
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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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18
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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 #include "SDL_config.h"
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23
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24 /* General event handling code for SDL */
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25
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26 #include "SDL.h"
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27 #include "SDL_events.h"
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28 #include "SDL_syswm.h"
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29 #include "SDL_thread.h"
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30 #include "SDL_events_c.h"
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31 #include "../timer/SDL_timer_c.h"
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32 #if !SDL_JOYSTICK_DISABLED
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33 #include "../joystick/SDL_joystick_c.h"
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34 #endif
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35 #include "../video/SDL_sysvideo.h"
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36
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37 /* Public data -- the event filter */
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38 SDL_EventFilter SDL_EventOK = NULL;
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39 void *SDL_EventOKParam;
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40
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41 typedef struct {
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42 Uint32 bits[8];
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43 } SDL_DisabledEventBlock;
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44
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45 static SDL_DisabledEventBlock *SDL_disabled_events[256];
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46 static Uint32 SDL_userevents = SDL_USEREVENT;
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47
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48 /* Private data -- event queue */
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49 #define MAXEVENTS 128
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50 static struct
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51 {
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52 SDL_mutex *lock;
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53 int active;
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54 int head;
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55 int tail;
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56 SDL_Event event[MAXEVENTS];
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57 int wmmsg_next;
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58 struct SDL_SysWMmsg wmmsg[MAXEVENTS];
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59 } SDL_EventQ;
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60
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61
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62 static __inline__ SDL_bool
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63 SDL_ShouldPollJoystick()
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64 {
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65 #if !SDL_JOYSTICK_DISABLED
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66 if (SDL_numjoysticks &&
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67 (!SDL_disabled_events[SDL_JOYAXISMOTION >> 8] ||
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68 SDL_JoystickEventState(SDL_QUERY))) {
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69 return SDL_TRUE;
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70 }
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71 #endif
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72 return SDL_FALSE;
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73 }
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74
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75 /* Public functions */
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76
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77 void
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78 SDL_StopEventLoop(void)
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79 {
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80 int i;
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81
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82 if (SDL_EventQ.lock) {
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83 SDL_DestroyMutex(SDL_EventQ.lock);
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84 SDL_EventQ.lock = NULL;
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85 }
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86
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87 /* Clean out EventQ */
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88 SDL_EventQ.head = 0;
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89 SDL_EventQ.tail = 0;
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90 SDL_EventQ.wmmsg_next = 0;
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91
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92 /* Clear disabled event state */
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93 for (i = 0; i < SDL_arraysize(SDL_disabled_events); ++i) {
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94 if (SDL_disabled_events[i]) {
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95 SDL_free(SDL_disabled_events[i]);
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96 SDL_disabled_events[i] = NULL;
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97 }
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98 }
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99 }
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100
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101 /* This function (and associated calls) may be called more than once */
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102 int
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103 SDL_StartEventLoop(void)
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104 {
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105 int retcode;
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106
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107 /* Clean out the event queue */
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108 SDL_EventQ.lock = NULL;
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109 SDL_StopEventLoop();
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110
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111 /* No filter to start with, process most event types */
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112 SDL_EventOK = NULL;
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113 SDL_EventState(SDL_SYSWMEVENT, SDL_DISABLE);
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114
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115 /* Create the lock and set ourselves active */
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116 #if !SDL_THREADS_DISABLED
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117 SDL_EventQ.lock = SDL_CreateMutex();
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118 if (SDL_EventQ.lock == NULL) {
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119 return (-1);
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120 }
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121 #endif /* !SDL_THREADS_DISABLED */
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122 SDL_EventQ.active = 1;
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123
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124 return (0);
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125 }
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126
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127
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128 /* Add an event to the event queue -- called with the queue locked */
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129 static int
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130 SDL_AddEvent(SDL_Event * event)
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131 {
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132 int tail, added;
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133
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134 tail = (SDL_EventQ.tail + 1) % MAXEVENTS;
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135 if (tail == SDL_EventQ.head) {
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136 /* Overflow, drop event */
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137 added = 0;
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138 } else {
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139 SDL_EventQ.event[SDL_EventQ.tail] = *event;
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140 if (event->type == SDL_SYSWMEVENT) {
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141 /* Note that it's possible to lose an event */
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142 int next = SDL_EventQ.wmmsg_next;
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143 SDL_EventQ.wmmsg[next] = *event->syswm.msg;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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144 SDL_EventQ.event[SDL_EventQ.tail].syswm.msg =
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145 &SDL_EventQ.wmmsg[next];
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146 SDL_EventQ.wmmsg_next = (next + 1) % MAXEVENTS;
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147 }
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148 SDL_EventQ.tail = tail;
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149 added = 1;
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diff changeset
150 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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151 return (added);
0
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152 }
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153
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diff changeset
154 /* Cut an event, and return the next valid spot, or the tail */
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155 /* -- called with the queue locked */
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156 static int
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157 SDL_CutEvent(int spot)
0
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158 {
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159 if (spot == SDL_EventQ.head) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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160 SDL_EventQ.head = (SDL_EventQ.head + 1) % MAXEVENTS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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161 return (SDL_EventQ.head);
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162 } else if ((spot + 1) % MAXEVENTS == SDL_EventQ.tail) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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163 SDL_EventQ.tail = spot;
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164 return (SDL_EventQ.tail);
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165 } else
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166 /* We cut the middle -- shift everything over */
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167 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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168 int here, next;
0
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169
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170 /* This can probably be optimized with SDL_memcpy() -- careful! */
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171 if (--SDL_EventQ.tail < 0) {
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172 SDL_EventQ.tail = MAXEVENTS - 1;
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173 }
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174 for (here = spot; here != SDL_EventQ.tail; here = next) {
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175 next = (here + 1) % MAXEVENTS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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176 SDL_EventQ.event[here] = SDL_EventQ.event[next];
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177 }
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178 return (spot);
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179 }
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180 /* NOTREACHED */
0
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181 }
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182
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183 /* Lock the event queue, take a peep at it, and unlock it */
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184 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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185 SDL_PeepEvents(SDL_Event * events, int numevents, SDL_eventaction action,
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186 Uint32 minType, Uint32 maxType)
0
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187 {
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188 int i, used;
0
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189
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190 /* Don't look after we've quit */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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191 if (!SDL_EventQ.active) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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192 return (-1);
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193 }
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194 /* Lock the event queue */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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195 used = 0;
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196 if (SDL_mutexP(SDL_EventQ.lock) == 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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197 if (action == SDL_ADDEVENT) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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198 for (i = 0; i < numevents; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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199 used += SDL_AddEvent(&events[i]);
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200 }
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201 } else {
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202 SDL_Event tmpevent;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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203 int spot;
0
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204
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205 /* If 'events' is NULL, just see if they exist */
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206 if (events == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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207 action = SDL_PEEKEVENT;
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208 numevents = 1;
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diff changeset
209 events = &tmpevent;
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210 }
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211 spot = SDL_EventQ.head;
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212 while ((used < numevents) && (spot != SDL_EventQ.tail)) {
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213 Uint32 type = SDL_EventQ.event[spot].type;
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214 if (minType <= type && type <= maxType) {
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215 events[used++] = SDL_EventQ.event[spot];
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diff changeset
216 if (action == SDL_GETEVENT) {
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217 spot = SDL_CutEvent(spot);
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218 } else {
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219 spot = (spot + 1) % MAXEVENTS;
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220 }
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221 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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222 spot = (spot + 1) % MAXEVENTS;
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223 }
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224 }
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225 }
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226 SDL_mutexV(SDL_EventQ.lock);
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227 } else {
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228 SDL_SetError("Couldn't lock event queue");
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229 used = -1;
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230 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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231 return (used);
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232 }
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233
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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234 SDL_bool
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235 SDL_HasEvent(Uint32 type)
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236 {
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237 return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, type, type) > 0);
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238 }
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239
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240 SDL_bool
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diff changeset
241 SDL_HasEvents(Uint32 minType, Uint32 maxType)
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diff changeset
242 {
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243 return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, minType, maxType) > 0);
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244 }
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245
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diff changeset
246 void
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247 SDL_FlushEvent(Uint32 type)
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248 {
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249 SDL_FlushEvents(type, type);
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250 }
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251
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diff changeset
252 void
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253 SDL_FlushEvents(Uint32 minType, Uint32 maxType)
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254 {
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255 /* Don't look after we've quit */
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diff changeset
256 if (!SDL_EventQ.active) {
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257 return;
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258 }
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259
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260 /* Make sure the events are current */
363604b42e84 Make sure events are current before flushing them.
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261 SDL_PumpEvents();
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diff changeset
262
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263 /* Lock the event queue */
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diff changeset
264 if (SDL_mutexP(SDL_EventQ.lock) == 0) {
faa9fc8e7f67 General improvements for user custom event registration
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diff changeset
265 int spot = SDL_EventQ.head;
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266 while (spot != SDL_EventQ.tail) {
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267 Uint32 type = SDL_EventQ.event[spot].type;
faa9fc8e7f67 General improvements for user custom event registration
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diff changeset
268 if (minType <= type && type <= maxType) {
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diff changeset
269 spot = SDL_CutEvent(spot);
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diff changeset
270 } else {
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271 spot = (spot + 1) % MAXEVENTS;
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diff changeset
272 }
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diff changeset
273 }
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diff changeset
274 SDL_mutexV(SDL_EventQ.lock);
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275 }
0
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parents:
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276 }
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parents:
diff changeset
277
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parents:
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278 /* Run the system dependent event loops */
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279 void
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diff changeset
280 SDL_PumpEvents(void)
0
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diff changeset
281 {
5125
dc0dfdd58f27 Removed completely non-portable event thread hack.
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parents: 5113
diff changeset
282 SDL_VideoDevice *_this = SDL_GetVideoDevice();
0
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283
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parents: 5113
diff changeset
284 /* Get events from the video subsystem */
dc0dfdd58f27 Removed completely non-portable event thread hack.
Sam Lantinga <slouken@libsdl.org>
parents: 5113
diff changeset
285 if (_this) {
dc0dfdd58f27 Removed completely non-portable event thread hack.
Sam Lantinga <slouken@libsdl.org>
parents: 5113
diff changeset
286 _this->PumpEvents(_this);
dc0dfdd58f27 Removed completely non-portable event thread hack.
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parents: 5113
diff changeset
287 }
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
288 #if !SDL_JOYSTICK_DISABLED
5125
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parents: 5113
diff changeset
289 /* Check for joystick state change */
dc0dfdd58f27 Removed completely non-portable event thread hack.
Sam Lantinga <slouken@libsdl.org>
parents: 5113
diff changeset
290 if (SDL_ShouldPollJoystick()) {
dc0dfdd58f27 Removed completely non-portable event thread hack.
Sam Lantinga <slouken@libsdl.org>
parents: 5113
diff changeset
291 SDL_JoystickUpdate();
dc0dfdd58f27 Removed completely non-portable event thread hack.
Sam Lantinga <slouken@libsdl.org>
parents: 5113
diff changeset
292 }
0
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parents:
diff changeset
293 #endif
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parents:
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294 }
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295
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diff changeset
296 /* Public functions */
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297
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diff changeset
298 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
299 SDL_PollEvent(SDL_Event * event)
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diff changeset
300 {
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diff changeset
301 return SDL_WaitEventTimeout(event, 0);
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302 }
0
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303
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diff changeset
304 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
305 SDL_WaitEvent(SDL_Event * event)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
306 {
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307 return SDL_WaitEventTimeout(event, -1);
9da8f57ab92c Fixed bug #684
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parents: 2984
diff changeset
308 }
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
309
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
310 int
9da8f57ab92c Fixed bug #684
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diff changeset
311 SDL_WaitEventTimeout(SDL_Event * event, int timeout)
9da8f57ab92c Fixed bug #684
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parents: 2984
diff changeset
312 {
9da8f57ab92c Fixed bug #684
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parents: 2984
diff changeset
313 Uint32 expiration = 0;
9da8f57ab92c Fixed bug #684
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parents: 2984
diff changeset
314
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
315 if (timeout > 0)
9da8f57ab92c Fixed bug #684
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parents: 2984
diff changeset
316 expiration = SDL_GetTicks() + timeout;
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
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diff changeset
317
9da8f57ab92c Fixed bug #684
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parents: 2984
diff changeset
318 for (;;) {
1895
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diff changeset
319 SDL_PumpEvents();
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diff changeset
320 switch (SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
321 case -1:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
322 return 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
323 case 1:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
324 return 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
325 case 0:
3072
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
326 if (timeout == 0) {
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
327 /* Polling and no events, just return */
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
328 return 0;
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
329 }
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
330 if (timeout > 0 && ((int) (SDL_GetTicks() - expiration) >= 0)) {
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
331 /* Timeout expired and no events */
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
332 return 0;
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
333 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
334 SDL_Delay(10);
3072
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
335 break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
336 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
337 }
0
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parents:
diff changeset
338 }
74212992fb08 Initial revision
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parents:
diff changeset
339
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
340 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
341 SDL_PushEvent(SDL_Event * event)
0
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parents:
diff changeset
342 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
343 if (SDL_EventOK && !SDL_EventOK(SDL_EventOKParam, event)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
344 return 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
345 }
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346 if (SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0, 0) <= 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
347 return -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
348 }
4657
eed063a0bf5b Moved Multi finger gesture recognition into the library.
Jim Grandpre <jim.tla@gmail.com>
parents: 4642
diff changeset
349
eed063a0bf5b Moved Multi finger gesture recognition into the library.
Jim Grandpre <jim.tla@gmail.com>
parents: 4642
diff changeset
350 SDL_GestureProcessEvent(event);
eed063a0bf5b Moved Multi finger gesture recognition into the library.
Jim Grandpre <jim.tla@gmail.com>
parents: 4642
diff changeset
351
eed063a0bf5b Moved Multi finger gesture recognition into the library.
Jim Grandpre <jim.tla@gmail.com>
parents: 4642
diff changeset
352
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1769
diff changeset
353 return 1;
0
74212992fb08 Initial revision
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parents:
diff changeset
354 }
74212992fb08 Initial revision
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parents:
diff changeset
355
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
356 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
357 SDL_SetEventFilter(SDL_EventFilter filter, void *userdata)
0
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parents:
diff changeset
358 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
359 SDL_Event bitbucket;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
360
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
361 /* Set filter and discard pending events */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
362 SDL_EventOK = filter;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
363 SDL_EventOKParam = userdata;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
364 while (SDL_PollEvent(&bitbucket) > 0);
0
74212992fb08 Initial revision
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parents:
diff changeset
365 }
74212992fb08 Initial revision
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parents:
diff changeset
366
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
367 SDL_bool
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
368 SDL_GetEventFilter(SDL_EventFilter * filter, void **userdata)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
370 if (filter) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
371 *filter = SDL_EventOK;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
372 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
373 if (userdata) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
374 *userdata = SDL_EventOKParam;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
375 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
376 return SDL_EventOK ? SDL_TRUE : SDL_FALSE;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
379 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
380 SDL_FilterEvents(SDL_EventFilter filter, void *userdata)
0
74212992fb08 Initial revision
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parents:
diff changeset
381 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
382 if (SDL_mutexP(SDL_EventQ.lock) == 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
383 int spot;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
384
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
385 spot = SDL_EventQ.head;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
386 while (spot != SDL_EventQ.tail) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
387 if (filter(userdata, &SDL_EventQ.event[spot])) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
388 spot = (spot + 1) % MAXEVENTS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
389 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
390 spot = SDL_CutEvent(spot);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
391 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
392 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
393 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
394 SDL_mutexV(SDL_EventQ.lock);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
395 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
396
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
397 Uint8
4429
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
398 SDL_EventState(Uint32 type, int state)
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
399 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
400 Uint8 current_state;
4429
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
401 Uint8 hi = ((type >> 8) & 0xff);
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
402 Uint8 lo = (type & 0xff);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403
4429
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
404 if (SDL_disabled_events[hi] &&
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
405 (SDL_disabled_events[hi]->bits[lo/32] & (1 << (lo&31)))) {
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
406 current_state = SDL_DISABLE;
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
407 } else {
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
408 current_state = SDL_ENABLE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
409 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410
4429
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
411 if (state != current_state)
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
412 {
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
413 switch (state) {
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
414 case SDL_DISABLE:
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
415 /* Disable this event type and discard pending events */
faa9fc8e7f67 General improvements for user custom event registration
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416 if (!SDL_disabled_events[hi]) {
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417 SDL_disabled_events[hi] = (SDL_DisabledEventBlock*) SDL_calloc(1, sizeof(SDL_DisabledEventBlock));
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418 if (!SDL_disabled_events[hi]) {
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419 /* Out of memory, nothing we can do... */
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420 break;
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421 }
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422 }
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423 SDL_disabled_events[hi]->bits[lo/32] |= (1 << (lo&31));
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424 SDL_FlushEvent(type);
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425 break;
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426 case SDL_ENABLE:
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427 SDL_disabled_events[hi]->bits[lo/32] &= ~(1 << (lo&31));
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428 break;
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429 default:
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430 /* Querying state... */
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431 break;
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432 }
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433 }
4429
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434
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435 return current_state;
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436 }
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437
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438 Uint32
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439 SDL_RegisterEvents(int numevents)
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440 {
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441 Uint32 event_base;
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442
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443 if (SDL_userevents+numevents <= SDL_LASTEVENT) {
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444 event_base = SDL_userevents;
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445 SDL_userevents += numevents;
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446 } else {
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447 event_base = (Uint32)-1;
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448 }
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449 return event_base;
0
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450 }
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451
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452 /* This is a generic event handler.
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453 */
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454 int
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455 SDL_SendSysWMEvent(SDL_SysWMmsg * message)
0
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456 {
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457 int posted;
0
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458
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459 posted = 0;
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460 if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
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461 SDL_Event event;
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462 SDL_memset(&event, 0, sizeof(event));
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463 event.type = SDL_SYSWMEVENT;
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464 event.syswm.msg = message;
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465 posted = (SDL_PushEvent(&event) > 0);
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466 }
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467 /* Update internal event state */
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468 return (posted);
0
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469 }
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470
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471 /* vi: set ts=4 sw=4 expandtab: */