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annotate src/events/SDL_events.c @ 2116:b42abf0a50bc

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Avoid switch to supervisor mode in SDL_GetTicks, by updating system counter from vbl interrupt
author Patrice Mandin <patmandin@gmail.com>
date Sat, 09 Jun 2007 19:58:41 +0000
parents 542c78b6fb12
children 047245361002
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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_syswm.h"
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28 #include "SDL_sysevents.h"
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29 #include "SDL_events_c.h"
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30 #include "../timer/SDL_timer_c.h"
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31 #if !SDL_JOYSTICK_DISABLED
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32 #include "../joystick/SDL_joystick_c.h"
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33 #endif
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34
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35 /* Public data -- the event filter */
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36 SDL_EventFilter SDL_EventOK = NULL;
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37 void *SDL_EventOKParam;
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38 Uint8 SDL_ProcessEvents[SDL_NUMEVENTS];
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39 static Uint32 SDL_eventstate = 0;
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40
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41 /* Private data -- event queue */
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42 #define MAXEVENTS 128
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43 static struct
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44 {
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45 SDL_mutex *lock;
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46 int active;
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47 int head;
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48 int tail;
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49 SDL_Event event[MAXEVENTS];
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50 int wmmsg_next;
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51 struct SDL_SysWMmsg wmmsg[MAXEVENTS];
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52 } SDL_EventQ;
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53
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54 /* Private data -- event locking structure */
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55 static struct
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56 {
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57 SDL_mutex *lock;
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58 int safe;
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59 } SDL_EventLock;
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60
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61 /* Thread functions */
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62 static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */
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63 static Uint32 event_thread; /* The event thread id */
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64
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65 void
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66 SDL_Lock_EventThread(void)
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67 {
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68 if (SDL_EventThread && (SDL_ThreadID() != event_thread)) {
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69 /* Grab lock and spin until we're sure event thread stopped */
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70 SDL_mutexP(SDL_EventLock.lock);
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71 while (!SDL_EventLock.safe) {
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72 SDL_Delay(1);
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73 }
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74 }
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75 }
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76 void
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77 SDL_Unlock_EventThread(void)
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78 {
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79 if (SDL_EventThread && (SDL_ThreadID() != event_thread)) {
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80 SDL_mutexV(SDL_EventLock.lock);
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81 }
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82 }
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83
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84 #ifdef __OS2__
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85 /*
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86 * We'll increase the priority of GobbleEvents thread, so it will process
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87 * events in time for sure! For this, we need the DosSetPriority() API
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88 * from the os2.h include file.
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89 */
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90 #define INCL_DOSPROCESS
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91 #include <os2.h>
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92 #include <time.h>
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93 #endif
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94
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95 static int SDLCALL
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96 SDL_GobbleEvents(void *unused)
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97 {
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98 event_thread = SDL_ThreadID();
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99
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100 #ifdef __OS2__
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101 #ifdef USE_DOSSETPRIORITY
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102 /* Increase thread priority, so it will process events in time for sure! */
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103 DosSetPriority(PRTYS_THREAD, PRTYC_REGULAR, +16, 0);
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104 #endif
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105 #endif
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106
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107 while (SDL_EventQ.active) {
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108 SDL_VideoDevice *_this = SDL_GetVideoDevice();
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109
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110 /* Get events from the video subsystem */
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111 if (_this) {
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112 _this->PumpEvents(_this);
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113 }
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114
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115 /* Queue pending key-repeat events */
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116 SDL_CheckKeyRepeat();
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117
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118 #if !SDL_JOYSTICK_DISABLED
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119 /* Check for joystick state change */
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120 if (SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK)) {
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121 SDL_JoystickUpdate();
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122 }
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123 #endif
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124
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125 /* Give up the CPU for the rest of our timeslice */
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126 SDL_EventLock.safe = 1;
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127 if (SDL_timer_running) {
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128 SDL_ThreadedTimerCheck();
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129 }
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130 SDL_Delay(1);
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131
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132 /* Check for event locking.
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133 On the P of the lock mutex, if the lock is held, this thread
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134 will wait until the lock is released before continuing. The
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135 safe flag will be set, meaning that the other thread can go
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136 about it's business. The safe flag is reset before the V,
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137 so as soon as the mutex is free, other threads can see that
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138 it's not safe to interfere with the event thread.
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139 */
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140 SDL_mutexP(SDL_EventLock.lock);
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141 SDL_EventLock.safe = 0;
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142 SDL_mutexV(SDL_EventLock.lock);
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143 }
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144 SDL_SetTimerThreaded(0);
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145 event_thread = 0;
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146 return (0);
0
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147 }
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148
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149 static int
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150 SDL_StartEventThread(Uint32 flags)
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151 {
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152 /* Reset everything to zero */
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153 SDL_EventThread = NULL;
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154 SDL_memset(&SDL_EventLock, 0, sizeof(SDL_EventLock));
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155
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156 /* Create the lock and set ourselves active */
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157 #if !SDL_THREADS_DISABLED
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158 SDL_EventQ.lock = SDL_CreateMutex();
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159 if (SDL_EventQ.lock == NULL) {
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160 return (-1);
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161 }
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162 #endif /* !SDL_THREADS_DISABLED */
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163 SDL_EventQ.active = 1;
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164
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165 if ((flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD) {
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166 SDL_EventLock.lock = SDL_CreateMutex();
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167 if (SDL_EventLock.lock == NULL) {
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168 return (-1);
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169 }
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170 SDL_EventLock.safe = 0;
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171
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172 /* The event thread will handle timers too */
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173 SDL_SetTimerThreaded(2);
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174 #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC)
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175 #undef SDL_CreateThread
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176 SDL_EventThread =
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177 SDL_CreateThread(SDL_GobbleEvents, NULL, NULL, NULL);
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178 #else
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179 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL);
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180 #endif
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181 if (SDL_EventThread == NULL) {
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182 return (-1);
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183 }
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184 } else {
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185 event_thread = 0;
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186 }
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187 return (0);
0
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188 }
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189
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190 static void
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191 SDL_StopEventThread(void)
0
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192 {
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193 SDL_EventQ.active = 0;
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194 if (SDL_EventThread) {
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195 SDL_WaitThread(SDL_EventThread, NULL);
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196 SDL_EventThread = NULL;
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197 SDL_DestroyMutex(SDL_EventLock.lock);
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198 }
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199 #ifndef IPOD
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200 SDL_DestroyMutex(SDL_EventQ.lock);
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201 #endif
0
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202 }
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203
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204 Uint32
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205 SDL_EventThreadID(void)
0
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206 {
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207 return (event_thread);
0
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208 }
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209
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210 /* Public functions */
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211
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212 void
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213 SDL_StopEventLoop(void)
0
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214 {
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215 /* Halt the event thread, if running */
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216 SDL_StopEventThread();
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217
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218 /* Shutdown event handlers */
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219 SDL_KeyboardQuit();
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220 SDL_MouseQuit();
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221 SDL_QuitQuit();
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222
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223 /* Clean out EventQ */
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224 SDL_EventQ.head = 0;
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225 SDL_EventQ.tail = 0;
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226 SDL_EventQ.wmmsg_next = 0;
0
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227 }
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228
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229 /* This function (and associated calls) may be called more than once */
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230 int
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231 SDL_StartEventLoop(Uint32 flags)
0
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232 {
1895
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233 int retcode;
0
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234
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235 /* Clean out the event queue */
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236 SDL_EventThread = NULL;
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237 SDL_EventQ.lock = NULL;
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238 SDL_StopEventLoop();
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239
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240 /* No filter to start with, process most event types */
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241 SDL_EventOK = NULL;
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242 SDL_memset(SDL_ProcessEvents, SDL_ENABLE, sizeof(SDL_ProcessEvents));
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243 SDL_eventstate = ~0;
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244 /* It's not save to call SDL_EventState() yet */
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245 SDL_eventstate &= ~(0x00000001 << SDL_SYSWMEVENT);
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246 SDL_ProcessEvents[SDL_SYSWMEVENT] = SDL_IGNORE;
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247
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248 /* Initialize event handlers */
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249 retcode = 0;
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250 retcode += SDL_KeyboardInit();
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251 retcode += SDL_MouseInit();
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252 retcode += SDL_QuitInit();
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253 if (retcode < 0) {
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254 /* We don't expect them to fail, but... */
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255 return (-1);
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diff changeset
256 }
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257
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258 /* Create the lock and event thread */
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259 if (SDL_StartEventThread(flags) < 0) {
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260 SDL_StopEventLoop();
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261 return (-1);
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diff changeset
262 }
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263 return (0);
0
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diff changeset
264 }
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265
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266
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267 /* Add an event to the event queue -- called with the queue locked */
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268 static int
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269 SDL_AddEvent(SDL_Event * event)
0
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270 {
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diff changeset
271 int tail, added;
0
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272
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273 tail = (SDL_EventQ.tail + 1) % MAXEVENTS;
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274 if (tail == SDL_EventQ.head) {
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275 /* Overflow, drop event */
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276 added = 0;
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277 } else {
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278 SDL_EventQ.event[SDL_EventQ.tail] = *event;
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279 if (event->type == SDL_SYSWMEVENT) {
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280 /* Note that it's possible to lose an event */
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281 int next = SDL_EventQ.wmmsg_next;
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282 SDL_EventQ.wmmsg[next] = *event->syswm.msg;
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283 SDL_EventQ.event[SDL_EventQ.tail].syswm.msg =
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284 &SDL_EventQ.wmmsg[next];
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285 SDL_EventQ.wmmsg_next = (next + 1) % MAXEVENTS;
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286 }
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287 SDL_EventQ.tail = tail;
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288 added = 1;
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289 }
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290 return (added);
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291 }
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292
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293 /* Cut an event, and return the next valid spot, or the tail */
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294 /* -- called with the queue locked */
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295 static int
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296 SDL_CutEvent(int spot)
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297 {
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298 if (spot == SDL_EventQ.head) {
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299 SDL_EventQ.head = (SDL_EventQ.head + 1) % MAXEVENTS;
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300 return (SDL_EventQ.head);
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301 } else if ((spot + 1) % MAXEVENTS == SDL_EventQ.tail) {
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302 SDL_EventQ.tail = spot;
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303 return (SDL_EventQ.tail);
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304 } else
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305 /* We cut the middle -- shift everything over */
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306 {
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307 int here, next;
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308
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309 /* This can probably be optimized with SDL_memcpy() -- careful! */
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310 if (--SDL_EventQ.tail < 0) {
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311 SDL_EventQ.tail = MAXEVENTS - 1;
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312 }
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313 for (here = spot; here != SDL_EventQ.tail; here = next) {
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314 next = (here + 1) % MAXEVENTS;
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315 SDL_EventQ.event[here] = SDL_EventQ.event[next];
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316 }
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317 return (spot);
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318 }
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319 /* NOTREACHED */
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320 }
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321
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322 /* Lock the event queue, take a peep at it, and unlock it */
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323 int
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324 SDL_PeepEvents(SDL_Event * events, int numevents, SDL_eventaction action,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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325 Uint32 mask)
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326 {
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327 int i, used;
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328
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329 /* Don't look after we've quit */
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330 if (!SDL_EventQ.active) {
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331 return (-1);
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332 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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333 /* Lock the event queue */
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334 used = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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335 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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336 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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337 for (i = 0; i < numevents; ++i) {
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338 used += SDL_AddEvent(&events[i]);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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339 }
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340 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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341 SDL_Event tmpevent;
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342 int spot;
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343
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344 /* If 'events' is NULL, just see if they exist */
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345 if (events == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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346 action = SDL_PEEKEVENT;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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347 numevents = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
348 events = &tmpevent;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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349 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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350 spot = SDL_EventQ.head;
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351 while ((used < numevents) && (spot != SDL_EventQ.tail)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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352 if (mask & SDL_EVENTMASK(SDL_EventQ.event[spot].type)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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353 events[used++] = SDL_EventQ.event[spot];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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354 if (action == SDL_GETEVENT) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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355 spot = SDL_CutEvent(spot);
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diff changeset
356 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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357 spot = (spot + 1) % MAXEVENTS;
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358 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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359 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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360 spot = (spot + 1) % MAXEVENTS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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361 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
362 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
363 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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364 SDL_mutexV(SDL_EventQ.lock);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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365 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
366 SDL_SetError("Couldn't lock event queue");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
367 used = -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
368 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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369 return (used);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
370 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
371
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
372 SDL_bool
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
373 SDL_HasEvent(Uint32 mask)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
374 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
375 return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, mask) > 0);
0
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diff changeset
376 }
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diff changeset
377
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378 /* Run the system dependent event loops */
1895
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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>
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diff changeset
380 SDL_PumpEvents(void)
0
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diff changeset
381 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
382 if (!SDL_EventThread) {
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 SDL_VideoDevice *_this = SDL_GetVideoDevice();
0
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diff changeset
384
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
385 /* Get events from the video subsystem */
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 if (_this) {
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
387 _this->PumpEvents(_this);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
388 }
0
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diff changeset
389
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
390 /* Queue pending key-repeat events */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
391 SDL_CheckKeyRepeat();
0
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diff changeset
392
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
393 #if !SDL_JOYSTICK_DISABLED
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
394 /* Check for joystick state change */
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
395 if (SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK)) {
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 SDL_JoystickUpdate();
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 }
0
74212992fb08 Initial revision
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parents:
diff changeset
398 #endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
399 }
0
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parents:
diff changeset
400 }
74212992fb08 Initial revision
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parents:
diff changeset
401
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 /* Public functions */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403
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
404 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
405 SDL_PollEvent(SDL_Event * event)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 {
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
407 SDL_PumpEvents();
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
408
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 /* We can't return -1, just return 0 (no event) on error */
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
410 if (SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS) <= 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
411 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
412 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
413 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414
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
415 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
416 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
417 {
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
418 while (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
419 SDL_PumpEvents();
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
420 switch (SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
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
421 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
422 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
423 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
424 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
425 case 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
426 SDL_Delay(10);
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
427 }
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
428 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430
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
431 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
432 SDL_PushEvent(SDL_Event * event)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 {
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
434 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.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
435 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
436 }
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
437 if (SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0) <= 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
438 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
439 }
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
440 return 1;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442
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
443 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
444 SDL_SetEventFilter(SDL_EventFilter filter, void *userdata)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 {
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
446 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
447
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
448 /* 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
449 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
450 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
451 while (SDL_PollEvent(&bitbucket) > 0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453
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
454 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
455 SDL_GetEventFilter(SDL_EventFilter * filter, void **userdata)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 {
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
457 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
458 *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
459 }
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
460 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
461 *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
462 }
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
463 return SDL_EventOK ? SDL_TRUE : SDL_FALSE;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465
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
466 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
467 SDL_FilterEvents(SDL_EventFilter filter, void *userdata)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 {
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
469 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
470 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
471
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
472 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
473 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
474 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
475 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
476 } 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
477 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
478 }
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
479 }
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
480 }
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
481 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
482 }
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
483
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
484 Uint8
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
485 SDL_EventState(Uint8 type, int state)
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
486 {
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
487 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
488 Uint8 current_state;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489
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
490 /* If SDL_ALLEVENTS was specified... */
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
491 if (type == 0xFF) {
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
492 current_state = SDL_IGNORE;
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
493 for (type = 0; type < SDL_NUMEVENTS; ++type) {
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
494 if (SDL_ProcessEvents[type] != SDL_IGNORE) {
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
495 current_state = SDL_ENABLE;
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
496 }
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
497 SDL_ProcessEvents[type] = state;
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
498 if (state == SDL_ENABLE) {
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
499 SDL_eventstate |= (0x00000001 << (type));
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
500 } 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
501 SDL_eventstate &= ~(0x00000001 << (type));
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
502 }
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
503 }
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
504 while (SDL_PollEvent(&bitbucket) > 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
505 return (current_state);
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
506 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
507
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
508 /* Just set the state for one event type */
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
509 current_state = SDL_ProcessEvents[type];
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
510 switch (state) {
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
511 case SDL_IGNORE:
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
512 case SDL_ENABLE:
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
513 /* Set state 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
514 SDL_ProcessEvents[type] = state;
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
515 if (state == SDL_ENABLE) {
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
516 SDL_eventstate |= (0x00000001 << (type));
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
517 } 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
518 SDL_eventstate &= ~(0x00000001 << (type));
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
519 }
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
520 while (SDL_PollEvent(&bitbucket) > 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
521 break;
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
522 default:
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
523 /* Querying state? */
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
524 break;
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
525 }
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
526 return (current_state);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529 /* This is a generic event handler.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 */
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
531 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
532 SDL_SendSysWMEvent(SDL_SysWMmsg * message)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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534 int posted;
0
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535
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536 posted = 0;
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537 if (SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE) {
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538 SDL_Event event;
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539 SDL_memset(&event, 0, sizeof(event));
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parents: 1769
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540 event.type = SDL_SYSWMEVENT;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1769
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541 event.syswm.msg = message;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1769
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542 posted = (SDL_PushEvent(&event) > 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1769
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543 }
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544 /* Update internal event state */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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545 return (posted);
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74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
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546 }
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parents: 1769
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547
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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548 /* vi: set ts=4 sw=4 expandtab: */