annotate src/events/SDL_events.c @ 1028:5ba65305c954

Fix various problems with the timer code. * SDL_timer_running wasn't always updated correctly. * Fixed occasional crash in SDL_SetTimer() when clearing threaded timers * It was possible to get both the timer thread and event thread running * Other misc. cleanup
author Sam Lantinga <slouken@libsdl.org>
date Thu, 13 Jan 2005 23:24:56 +0000
parents b8d311d90021
children 28ac87a38c17
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* General event handling code for SDL */
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29
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30 #include <stdio.h>
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31 #include <string.h>
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32
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33 #include "SDL.h"
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34 #include "SDL_thread.h"
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35 #include "SDL_mutex.h"
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36 #include "SDL_events.h"
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37 #include "SDL_events_c.h"
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38 #include "SDL_timer_c.h"
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39 #ifndef DISABLE_JOYSTICK
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40 #include "SDL_joystick_c.h"
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41 #endif
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42 #ifndef ENABLE_X11
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43 #define DISABLE_X11
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44 #endif
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45 #include "SDL_syswm.h"
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46 #include "SDL_sysevents.h"
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47
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48 /* Public data -- the event filter */
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49 SDL_EventFilter SDL_EventOK = NULL;
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50 Uint8 SDL_ProcessEvents[SDL_NUMEVENTS];
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51 static Uint32 SDL_eventstate = 0;
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52
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53 /* Private data -- event queue */
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54 #define MAXEVENTS 128
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55 static struct {
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56 SDL_mutex *lock;
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57 int active;
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58 int head;
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59 int tail;
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60 SDL_Event event[MAXEVENTS];
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61 int wmmsg_next;
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62 struct SDL_SysWMmsg wmmsg[MAXEVENTS];
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63 } SDL_EventQ;
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64
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65 /* Private data -- event locking structure */
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66 static struct {
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67 SDL_mutex *lock;
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68 int safe;
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69 } SDL_EventLock;
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70
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71 /* Thread functions */
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72 static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */
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73 static Uint32 event_thread; /* The event thread id */
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74
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75 void SDL_Lock_EventThread(void)
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76 {
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77 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) {
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78 /* Grab lock and spin until we're sure event thread stopped */
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79 SDL_mutexP(SDL_EventLock.lock);
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80 while ( ! SDL_EventLock.safe ) {
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81 SDL_Delay(1);
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82 }
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83 }
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84 }
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85 void SDL_Unlock_EventThread(void)
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86 {
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87 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) {
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88 SDL_mutexV(SDL_EventLock.lock);
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89 }
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90 }
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91
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92 static int SDL_GobbleEvents(void *unused)
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93 {
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94 event_thread = SDL_ThreadID();
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95 while ( SDL_EventQ.active ) {
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96 SDL_VideoDevice *video = current_video;
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97 SDL_VideoDevice *this = current_video;
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98
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99 /* Get events from the video subsystem */
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100 if ( video ) {
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101 video->PumpEvents(this);
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102 }
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103
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104 /* Queue pending key-repeat events */
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105 SDL_CheckKeyRepeat();
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106
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107 #ifndef DISABLE_JOYSTICK
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108 /* Check for joystick state change */
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109 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) {
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110 SDL_JoystickUpdate();
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111 }
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112 #endif
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113
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114 /* Give up the CPU for the rest of our timeslice */
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115 SDL_EventLock.safe = 1;
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116 if ( SDL_timer_running ) {
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117 SDL_ThreadedTimerCheck();
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118 }
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119 SDL_Delay(1);
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120
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121 /* Check for event locking.
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122 On the P of the lock mutex, if the lock is held, this thread
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123 will wait until the lock is released before continuing. The
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124 safe flag will be set, meaning that the other thread can go
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125 about it's business. The safe flag is reset before the V,
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126 so as soon as the mutex is free, other threads can see that
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127 it's not safe to interfere with the event thread.
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128 */
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129 SDL_mutexP(SDL_EventLock.lock);
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130 SDL_EventLock.safe = 0;
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131 SDL_mutexV(SDL_EventLock.lock);
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132 }
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133 SDL_SetTimerThreaded(0);
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134 event_thread = 0;
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135 return(0);
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136 }
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137
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138 static int SDL_StartEventThread(Uint32 flags)
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139 {
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140 /* Reset everything to zero */
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141 SDL_EventThread = NULL;
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142 memset(&SDL_EventLock, 0, sizeof(SDL_EventLock));
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143
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144 /* Create the lock and set ourselves active */
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145 #ifndef DISABLE_THREADS
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146 SDL_EventQ.lock = SDL_CreateMutex();
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147 if ( SDL_EventQ.lock == NULL ) {
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148 #ifdef macintosh /* On MacOS 7/8, you can't multithread, so no lock needed */
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149 ;
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150 #else
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151 return(-1);
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152 #endif
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153 }
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154 #endif /* !DISABLE_THREADS */
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155 SDL_EventQ.active = 1;
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156
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157 if ( (flags&SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) {
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158 SDL_EventLock.lock = SDL_CreateMutex();
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159 if ( SDL_EventLock.lock == NULL ) {
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160 return(-1);
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161 }
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162 SDL_EventLock.safe = 0;
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163
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164 /* The event thread will handle timers too */
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165 SDL_SetTimerThreaded(2);
0
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166 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL);
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167 if ( SDL_EventThread == NULL ) {
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168 return(-1);
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169 }
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170 } else {
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171 event_thread = 0;
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172 }
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173 return(0);
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174 }
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175
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176 static void SDL_StopEventThread(void)
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177 {
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178 SDL_EventQ.active = 0;
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179 if ( SDL_EventThread ) {
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180 SDL_WaitThread(SDL_EventThread, NULL);
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181 SDL_EventThread = NULL;
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182 SDL_DestroyMutex(SDL_EventLock.lock);
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183 }
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184 SDL_DestroyMutex(SDL_EventQ.lock);
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185 }
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186
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187 Uint32 SDL_EventThreadID(void)
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188 {
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189 return(event_thread);
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190 }
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191
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192 /* Public functions */
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193
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194 void SDL_StopEventLoop(void)
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195 {
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196 /* Halt the event thread, if running */
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197 SDL_StopEventThread();
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198
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199 /* Clean out EventQ */
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200 SDL_EventQ.head = 0;
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201 SDL_EventQ.tail = 0;
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202 SDL_EventQ.wmmsg_next = 0;
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203 }
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204
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205 /* This function (and associated calls) may be called more than once */
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206 int SDL_StartEventLoop(Uint32 flags)
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207 {
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208 int retcode;
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209
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210 /* Clean out the event queue */
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211 SDL_EventThread = NULL;
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212 SDL_EventQ.lock = NULL;
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213 SDL_StopEventLoop();
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214
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215 /* No filter to start with, process most event types */
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216 SDL_EventOK = NULL;
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217 memset(SDL_ProcessEvents,SDL_ENABLE,sizeof(SDL_ProcessEvents));
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218 SDL_eventstate = ~0;
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219 /* It's not save to call SDL_EventState() yet */
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220 SDL_eventstate &= ~(0x00000001 << SDL_SYSWMEVENT);
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221 SDL_ProcessEvents[SDL_SYSWMEVENT] = SDL_IGNORE;
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222
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223 /* Initialize event handlers */
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224 retcode = 0;
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225 retcode += SDL_AppActiveInit();
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226 retcode += SDL_KeyboardInit();
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227 retcode += SDL_MouseInit();
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228 retcode += SDL_QuitInit();
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229 if ( retcode < 0 ) {
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diff changeset
230 /* We don't expect them to fail, but... */
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231 return(-1);
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232 }
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233
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234 /* Create the lock and event thread */
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diff changeset
235 if ( SDL_StartEventThread(flags) < 0 ) {
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236 SDL_StopEventLoop();
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237 return(-1);
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parents:
diff changeset
238 }
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diff changeset
239 return(0);
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parents:
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240 }
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diff changeset
241
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diff changeset
242
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parents:
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243 /* Add an event to the event queue -- called with the queue locked */
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244 static int SDL_AddEvent(SDL_Event *event)
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245 {
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246 int tail, added;
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247
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248 tail = (SDL_EventQ.tail+1)%MAXEVENTS;
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parents:
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249 if ( tail == SDL_EventQ.head ) {
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parents:
diff changeset
250 /* Overflow, drop event */
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251 added = 0;
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parents:
diff changeset
252 } else {
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253 SDL_EventQ.event[SDL_EventQ.tail] = *event;
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254 if (event->type == SDL_SYSWMEVENT) {
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255 /* Note that it's possible to lose an event */
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diff changeset
256 int next = SDL_EventQ.wmmsg_next;
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257 SDL_EventQ.wmmsg[next] = *event->syswm.msg;
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258 SDL_EventQ.event[SDL_EventQ.tail].syswm.msg =
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259 &SDL_EventQ.wmmsg[next];
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260 SDL_EventQ.wmmsg_next = (next+1)%MAXEVENTS;
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parents:
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261 }
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diff changeset
262 SDL_EventQ.tail = tail;
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263 added = 1;
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parents:
diff changeset
264 }
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parents:
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265 return(added);
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parents:
diff changeset
266 }
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diff changeset
267
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parents:
diff changeset
268 /* Cut an event, and return the next valid spot, or the tail */
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parents:
diff changeset
269 /* -- called with the queue locked */
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diff changeset
270 static int SDL_CutEvent(int spot)
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parents:
diff changeset
271 {
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parents:
diff changeset
272 if ( spot == SDL_EventQ.head ) {
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273 SDL_EventQ.head = (SDL_EventQ.head+1)%MAXEVENTS;
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parents:
diff changeset
274 return(SDL_EventQ.head);
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parents:
diff changeset
275 } else
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parents:
diff changeset
276 if ( (spot+1)%MAXEVENTS == SDL_EventQ.tail ) {
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parents:
diff changeset
277 SDL_EventQ.tail = spot;
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parents:
diff changeset
278 return(SDL_EventQ.tail);
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parents:
diff changeset
279 } else
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parents:
diff changeset
280 /* We cut the middle -- shift everything over */
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parents:
diff changeset
281 {
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parents:
diff changeset
282 int here, next;
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parents:
diff changeset
283
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parents:
diff changeset
284 /* This can probably be optimized with memcpy() -- careful! */
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parents:
diff changeset
285 if ( --SDL_EventQ.tail < 0 ) {
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parents:
diff changeset
286 SDL_EventQ.tail = MAXEVENTS-1;
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parents:
diff changeset
287 }
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parents:
diff changeset
288 for ( here=spot; here != SDL_EventQ.tail; here = next ) {
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parents:
diff changeset
289 next = (here+1)%MAXEVENTS;
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parents:
diff changeset
290 SDL_EventQ.event[here] = SDL_EventQ.event[next];
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parents:
diff changeset
291 }
74212992fb08 Initial revision
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parents:
diff changeset
292 return(spot);
74212992fb08 Initial revision
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parents:
diff changeset
293 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 /* NOTREACHED */
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parents:
diff changeset
295 }
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parents:
diff changeset
296
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parents:
diff changeset
297 /* Lock the event queue, take a peep at it, and unlock it */
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parents:
diff changeset
298 int SDL_PeepEvents(SDL_Event *events, int numevents, SDL_eventaction action,
74212992fb08 Initial revision
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parents:
diff changeset
299 Uint32 mask)
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parents:
diff changeset
300 {
74212992fb08 Initial revision
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parents:
diff changeset
301 int i, used;
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parents:
diff changeset
302
74212992fb08 Initial revision
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parents:
diff changeset
303 /* Don't look after we've quit */
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parents:
diff changeset
304 if ( ! SDL_EventQ.active ) {
276
8af85680ca0a Updated the documentation for the SDL_PushEvent() call.
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
305 return(-1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 /* Lock the event queue */
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parents:
diff changeset
308 used = 0;
74212992fb08 Initial revision
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parents:
diff changeset
309 if ( SDL_mutexP(SDL_EventQ.lock) == 0 ) {
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parents:
diff changeset
310 if ( action == SDL_ADDEVENT ) {
74212992fb08 Initial revision
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parents:
diff changeset
311 for ( i=0; i<numevents; ++i ) {
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parents:
diff changeset
312 used += SDL_AddEvent(&events[i]);
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parents:
diff changeset
313 }
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parents:
diff changeset
314 } else {
74212992fb08 Initial revision
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parents:
diff changeset
315 SDL_Event tmpevent;
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parents:
diff changeset
316 int spot;
74212992fb08 Initial revision
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parents:
diff changeset
317
74212992fb08 Initial revision
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parents:
diff changeset
318 /* If 'events' is NULL, just see if they exist */
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parents:
diff changeset
319 if ( events == NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
320 action = SDL_PEEKEVENT;
74212992fb08 Initial revision
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parents:
diff changeset
321 numevents = 1;
74212992fb08 Initial revision
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parents:
diff changeset
322 events = &tmpevent;
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parents:
diff changeset
323 }
74212992fb08 Initial revision
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parents:
diff changeset
324 spot = SDL_EventQ.head;
74212992fb08 Initial revision
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parents:
diff changeset
325 while ((used < numevents)&&(spot != SDL_EventQ.tail)) {
74212992fb08 Initial revision
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parents:
diff changeset
326 if ( mask & SDL_EVENTMASK(SDL_EventQ.event[spot].type) ) {
74212992fb08 Initial revision
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parents:
diff changeset
327 events[used++] = SDL_EventQ.event[spot];
74212992fb08 Initial revision
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parents:
diff changeset
328 if ( action == SDL_GETEVENT ) {
74212992fb08 Initial revision
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parents:
diff changeset
329 spot = SDL_CutEvent(spot);
74212992fb08 Initial revision
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parents:
diff changeset
330 } else {
74212992fb08 Initial revision
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parents:
diff changeset
331 spot = (spot+1)%MAXEVENTS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 } else {
74212992fb08 Initial revision
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parents:
diff changeset
334 spot = (spot+1)%MAXEVENTS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 SDL_mutexV(SDL_EventQ.lock);
74212992fb08 Initial revision
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parents:
diff changeset
339 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 SDL_SetError("Couldn't lock event queue");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 used = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 }
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343 return(used);
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parents:
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344 }
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345
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parents:
diff changeset
346 /* Run the system dependent event loops */
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parents:
diff changeset
347 void SDL_PumpEvents(void)
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parents:
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348 {
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parents:
diff changeset
349 if ( !SDL_EventThread ) {
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diff changeset
350 SDL_VideoDevice *video = current_video;
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351 SDL_VideoDevice *this = current_video;
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352
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parents:
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353 /* Get events from the video subsystem */
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parents:
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354 if ( video ) {
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parents:
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355 video->PumpEvents(this);
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parents:
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356 }
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parents:
diff changeset
357
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parents:
diff changeset
358 /* Queue pending key-repeat events */
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parents:
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359 SDL_CheckKeyRepeat();
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parents:
diff changeset
360
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parents:
diff changeset
361 #ifndef DISABLE_JOYSTICK
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parents:
diff changeset
362 /* Check for joystick state change */
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parents:
diff changeset
363 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) {
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parents:
diff changeset
364 SDL_JoystickUpdate();
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parents:
diff changeset
365 }
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parents:
diff changeset
366 #endif
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parents:
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367 }
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parents:
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368 }
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parents:
diff changeset
369
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parents:
diff changeset
370 /* Public functions */
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parents:
diff changeset
371
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parents:
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372 int SDL_PollEvent (SDL_Event *event)
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parents:
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373 {
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parents:
diff changeset
374 SDL_PumpEvents();
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parents:
diff changeset
375
352
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
376 /* We can't return -1, just return 0 (no event) on error */
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
377 if ( SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS) <= 0 )
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
378 return 0;
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
379 return 1;
0
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parents:
diff changeset
380 }
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parents:
diff changeset
381
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parents:
diff changeset
382 int SDL_WaitEvent (SDL_Event *event)
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parents:
diff changeset
383 {
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parents:
diff changeset
384 while ( 1 ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 SDL_PumpEvents();
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parents:
diff changeset
386 switch(SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
353
d47637068e52 The documented error return value for SDL_WaitEvent() is 0.
Sam Lantinga <slouken@libsdl.org>
parents: 352
diff changeset
387 case -1: return 0;
0
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parents:
diff changeset
388 case 1: return 1;
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parents:
diff changeset
389 case 0: SDL_Delay(10);
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parents:
diff changeset
390 }
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parents:
diff changeset
391 }
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parents:
diff changeset
392 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 int SDL_PushEvent(SDL_Event *event)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 {
384
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
396 if ( SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0) <= 0 )
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
397 return -1;
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
398 return 0;
0
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parents:
diff changeset
399 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400
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parents:
diff changeset
401 void SDL_SetEventFilter (SDL_EventFilter filter)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 SDL_Event bitbucket;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 /* Set filter and discard pending events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 SDL_EventOK = filter;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 SDL_EventFilter SDL_GetEventFilter(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 return(SDL_EventOK);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 Uint8 SDL_EventState (Uint8 type, int state)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 SDL_Event bitbucket;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 Uint8 current_state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 /* If SDL_ALLEVENTS was specified... */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 if ( type == 0xFF ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 current_state = SDL_IGNORE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 for ( type=0; type<SDL_NUMEVENTS; ++type ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 if ( SDL_ProcessEvents[type] != SDL_IGNORE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 current_state = SDL_ENABLE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 SDL_ProcessEvents[type] = state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 if ( state == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 SDL_eventstate |= (0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 SDL_eventstate &= ~(0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 return(current_state);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 /* Just set the state for one event type */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 current_state = SDL_ProcessEvents[type];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 switch (state) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 case SDL_IGNORE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 case SDL_ENABLE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 /* Set state and discard pending events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 SDL_ProcessEvents[type] = state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 if ( state == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 SDL_eventstate |= (0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 SDL_eventstate &= ~(0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 /* Querying state? */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 return(current_state);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 /* This is a generic event handler.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 int SDL_PrivateSysWMEvent(SDL_SysWMmsg *message)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 int posted;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 posted = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 SDL_Event event;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 memset(&event, 0, sizeof(event));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 event.type = SDL_SYSWMEVENT;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 event.syswm.msg = message;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 posted = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 SDL_PushEvent(&event);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 /* Update internal event state */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 return(posted);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 }