annotate src/events/SDL_events.c @ 3966:c0de2aac0a8c SDL-1.2

Added patch note for subversion revision 3076
author Sam Lantinga <slouken@libsdl.org>
date Fri, 15 Jun 2007 11:43:14 +0000
parents 290b5baf2fca
children 782fd950bd46 c121d94672cb e85e65aec22f
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 Uint8 SDL_ProcessEvents[SDL_NUMEVENTS];
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38 static Uint32 SDL_eventstate = 0;
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39
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40 /* Private data -- event queue */
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41 #define MAXEVENTS 128
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42 static struct {
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43 SDL_mutex *lock;
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44 int active;
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45 int head;
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46 int tail;
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47 SDL_Event event[MAXEVENTS];
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48 int wmmsg_next;
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49 struct SDL_SysWMmsg wmmsg[MAXEVENTS];
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50 } SDL_EventQ;
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51
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52 /* Private data -- event locking structure */
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53 static struct {
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54 SDL_mutex *lock;
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55 int safe;
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56 } SDL_EventLock;
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57
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58 /* Thread functions */
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59 static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */
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60 static Uint32 event_thread; /* The event thread id */
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61
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62 void SDL_Lock_EventThread(void)
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63 {
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64 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) {
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65 /* Grab lock and spin until we're sure event thread stopped */
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66 SDL_mutexP(SDL_EventLock.lock);
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67 while ( ! SDL_EventLock.safe ) {
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68 SDL_Delay(1);
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69 }
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70 }
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71 }
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72 void SDL_Unlock_EventThread(void)
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73 {
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74 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) {
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75 SDL_mutexV(SDL_EventLock.lock);
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76 }
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77 }
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78
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79 #ifdef __OS2__
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80 /*
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81 * We'll increase the priority of GobbleEvents thread, so it will process
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82 * events in time for sure! For this, we need the DosSetPriority() API
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83 * from the os2.h include file.
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84 */
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85 #define INCL_DOSPROCESS
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86 #include <os2.h>
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87 #include <time.h>
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88 #endif
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89
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90 static int SDLCALL SDL_GobbleEvents(void *unused)
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91 {
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92 event_thread = SDL_ThreadID();
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93
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94 #ifdef __OS2__
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95 #ifdef USE_DOSSETPRIORITY
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96 /* Increase thread priority, so it will process events in time for sure! */
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97 DosSetPriority(PRTYS_THREAD, PRTYC_REGULAR, +16, 0);
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98 #endif
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99 #endif
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100
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101 while ( SDL_EventQ.active ) {
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102 SDL_VideoDevice *video = current_video;
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103 SDL_VideoDevice *this = current_video;
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104
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105 /* Get events from the video subsystem */
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106 if ( video ) {
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107 video->PumpEvents(this);
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108 }
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109
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110 /* Queue pending key-repeat events */
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111 SDL_CheckKeyRepeat();
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112
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113 #if !SDL_JOYSTICK_DISABLED
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114 /* Check for joystick state change */
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115 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) {
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116 SDL_JoystickUpdate();
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117 }
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118 #endif
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119
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120 /* Give up the CPU for the rest of our timeslice */
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121 SDL_EventLock.safe = 1;
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122 if ( SDL_timer_running ) {
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123 SDL_ThreadedTimerCheck();
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124 }
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125 SDL_Delay(1);
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126
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127 /* Check for event locking.
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128 On the P of the lock mutex, if the lock is held, this thread
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129 will wait until the lock is released before continuing. The
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130 safe flag will be set, meaning that the other thread can go
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131 about it's business. The safe flag is reset before the V,
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132 so as soon as the mutex is free, other threads can see that
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133 it's not safe to interfere with the event thread.
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134 */
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135 SDL_mutexP(SDL_EventLock.lock);
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136 SDL_EventLock.safe = 0;
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137 SDL_mutexV(SDL_EventLock.lock);
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138 }
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139 SDL_SetTimerThreaded(0);
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140 event_thread = 0;
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141 return(0);
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142 }
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143
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144 static int SDL_StartEventThread(Uint32 flags)
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145 {
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146 /* Reset everything to zero */
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147 SDL_EventThread = NULL;
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148 SDL_memset(&SDL_EventLock, 0, sizeof(SDL_EventLock));
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149
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150 /* Create the lock and set ourselves active */
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151 #if !SDL_THREADS_DISABLED
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152 SDL_EventQ.lock = SDL_CreateMutex();
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153 if ( SDL_EventQ.lock == NULL ) {
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154 #ifdef __MACOS__ /* MacOS classic you can't multithread, so no lock needed */
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155 ;
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156 #else
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157 return(-1);
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158 #endif
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159 }
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160 #endif /* !SDL_THREADS_DISABLED */
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161 SDL_EventQ.active = 1;
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162
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163 if ( (flags&SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) {
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164 SDL_EventLock.lock = SDL_CreateMutex();
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165 if ( SDL_EventLock.lock == NULL ) {
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166 return(-1);
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167 }
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168 SDL_EventLock.safe = 0;
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169
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170 /* The event thread will handle timers too */
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171 SDL_SetTimerThreaded(2);
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172 #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC)
1330
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173 #undef SDL_CreateThread
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174 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL, NULL, NULL);
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175 #else
0
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176 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL);
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177 #endif
0
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178 if ( SDL_EventThread == NULL ) {
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179 return(-1);
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180 }
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181 } else {
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182 event_thread = 0;
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183 }
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184 return(0);
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185 }
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186
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187 static void SDL_StopEventThread(void)
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188 {
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189 SDL_EventQ.active = 0;
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190 if ( SDL_EventThread ) {
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191 SDL_WaitThread(SDL_EventThread, NULL);
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192 SDL_EventThread = NULL;
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193 SDL_DestroyMutex(SDL_EventLock.lock);
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194 }
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195 #ifndef IPOD
0
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196 SDL_DestroyMutex(SDL_EventQ.lock);
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197 #endif
0
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198 }
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199
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200 Uint32 SDL_EventThreadID(void)
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201 {
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202 return(event_thread);
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203 }
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204
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205 /* Public functions */
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206
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207 void SDL_StopEventLoop(void)
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208 {
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209 /* Halt the event thread, if running */
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210 SDL_StopEventThread();
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211
1123
28ac87a38c17 Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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212 /* Shutdown event handlers */
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213 SDL_AppActiveQuit();
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214 SDL_KeyboardQuit();
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215 SDL_MouseQuit();
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216 SDL_QuitQuit();
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217
0
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218 /* Clean out EventQ */
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219 SDL_EventQ.head = 0;
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220 SDL_EventQ.tail = 0;
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221 SDL_EventQ.wmmsg_next = 0;
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222 }
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223
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224 /* This function (and associated calls) may be called more than once */
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225 int SDL_StartEventLoop(Uint32 flags)
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226 {
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227 int retcode;
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228
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229 /* Clean out the event queue */
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230 SDL_EventThread = NULL;
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231 SDL_EventQ.lock = NULL;
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232 SDL_StopEventLoop();
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233
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234 /* No filter to start with, process most event types */
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235 SDL_EventOK = NULL;
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236 SDL_memset(SDL_ProcessEvents,SDL_ENABLE,sizeof(SDL_ProcessEvents));
0
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237 SDL_eventstate = ~0;
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238 /* It's not save to call SDL_EventState() yet */
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239 SDL_eventstate &= ~(0x00000001 << SDL_SYSWMEVENT);
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240 SDL_ProcessEvents[SDL_SYSWMEVENT] = SDL_IGNORE;
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241
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242 /* Initialize event handlers */
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243 retcode = 0;
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244 retcode += SDL_AppActiveInit();
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245 retcode += SDL_KeyboardInit();
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246 retcode += SDL_MouseInit();
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247 retcode += SDL_QuitInit();
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248 if ( retcode < 0 ) {
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249 /* We don't expect them to fail, but... */
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250 return(-1);
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251 }
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252
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253 /* Create the lock and event thread */
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254 if ( SDL_StartEventThread(flags) < 0 ) {
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255 SDL_StopEventLoop();
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256 return(-1);
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257 }
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258 return(0);
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259 }
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260
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261
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262 /* Add an event to the event queue -- called with the queue locked */
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263 static int SDL_AddEvent(SDL_Event *event)
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264 {
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265 int tail, added;
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diff changeset
266
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267 tail = (SDL_EventQ.tail+1)%MAXEVENTS;
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268 if ( tail == SDL_EventQ.head ) {
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diff changeset
269 /* Overflow, drop event */
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diff changeset
270 added = 0;
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diff changeset
271 } else {
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272 SDL_EventQ.event[SDL_EventQ.tail] = *event;
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273 if (event->type == SDL_SYSWMEVENT) {
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diff changeset
274 /* Note that it's possible to lose an event */
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275 int next = SDL_EventQ.wmmsg_next;
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276 SDL_EventQ.wmmsg[next] = *event->syswm.msg;
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277 SDL_EventQ.event[SDL_EventQ.tail].syswm.msg =
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278 &SDL_EventQ.wmmsg[next];
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279 SDL_EventQ.wmmsg_next = (next+1)%MAXEVENTS;
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diff changeset
280 }
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281 SDL_EventQ.tail = tail;
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282 added = 1;
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diff changeset
283 }
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diff changeset
284 return(added);
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diff changeset
285 }
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diff changeset
286
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diff changeset
287 /* Cut an event, and return the next valid spot, or the tail */
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diff changeset
288 /* -- called with the queue locked */
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diff changeset
289 static int SDL_CutEvent(int spot)
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diff changeset
290 {
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diff changeset
291 if ( spot == SDL_EventQ.head ) {
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diff changeset
292 SDL_EventQ.head = (SDL_EventQ.head+1)%MAXEVENTS;
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diff changeset
293 return(SDL_EventQ.head);
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diff changeset
294 } else
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diff changeset
295 if ( (spot+1)%MAXEVENTS == SDL_EventQ.tail ) {
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parents:
diff changeset
296 SDL_EventQ.tail = spot;
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diff changeset
297 return(SDL_EventQ.tail);
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diff changeset
298 } else
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diff changeset
299 /* We cut the middle -- shift everything over */
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diff changeset
300 {
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diff changeset
301 int here, next;
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diff changeset
302
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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diff changeset
303 /* This can probably be optimized with SDL_memcpy() -- careful! */
0
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diff changeset
304 if ( --SDL_EventQ.tail < 0 ) {
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diff changeset
305 SDL_EventQ.tail = MAXEVENTS-1;
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diff changeset
306 }
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diff changeset
307 for ( here=spot; here != SDL_EventQ.tail; here = next ) {
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diff changeset
308 next = (here+1)%MAXEVENTS;
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diff changeset
309 SDL_EventQ.event[here] = SDL_EventQ.event[next];
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parents:
diff changeset
310 }
74212992fb08 Initial revision
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diff changeset
311 return(spot);
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parents:
diff changeset
312 }
74212992fb08 Initial revision
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diff changeset
313 /* NOTREACHED */
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parents:
diff changeset
314 }
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diff changeset
315
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diff changeset
316 /* Lock the event queue, take a peep at it, and unlock it */
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diff changeset
317 int SDL_PeepEvents(SDL_Event *events, int numevents, SDL_eventaction action,
74212992fb08 Initial revision
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parents:
diff changeset
318 Uint32 mask)
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parents:
diff changeset
319 {
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diff changeset
320 int i, used;
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diff changeset
321
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diff changeset
322 /* Don't look after we've quit */
74212992fb08 Initial revision
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parents:
diff changeset
323 if ( ! SDL_EventQ.active ) {
276
8af85680ca0a Updated the documentation for the SDL_PushEvent() call.
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parents: 252
diff changeset
324 return(-1);
0
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parents:
diff changeset
325 }
74212992fb08 Initial revision
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parents:
diff changeset
326 /* Lock the event queue */
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diff changeset
327 used = 0;
74212992fb08 Initial revision
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parents:
diff changeset
328 if ( SDL_mutexP(SDL_EventQ.lock) == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 if ( action == SDL_ADDEVENT ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 for ( i=0; i<numevents; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 used += SDL_AddEvent(&events[i]);
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
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 SDL_Event tmpevent;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 int spot;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 /* If 'events' is NULL, just see if they exist */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 if ( events == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 action = SDL_PEEKEVENT;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 numevents = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 events = &tmpevent;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 spot = SDL_EventQ.head;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 while ((used < numevents)&&(spot != SDL_EventQ.tail)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 if ( mask & SDL_EVENTMASK(SDL_EventQ.event[spot].type) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 events[used++] = SDL_EventQ.event[spot];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 if ( action == SDL_GETEVENT ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 spot = SDL_CutEvent(spot);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 spot = (spot+1)%MAXEVENTS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 spot = (spot+1)%MAXEVENTS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 SDL_mutexV(SDL_EventQ.lock);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 SDL_SetError("Couldn't lock event queue");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 used = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 return(used);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 /* Run the system dependent event loops */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 void SDL_PumpEvents(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 if ( !SDL_EventThread ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 /* Get events from the video subsystem */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 if ( video ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 video->PumpEvents(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 /* Queue pending key-repeat events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 SDL_CheckKeyRepeat();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
380 #if !SDL_JOYSTICK_DISABLED
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 /* Check for joystick state change */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 SDL_JoystickUpdate();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 /* Public functions */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 int SDL_PollEvent (SDL_Event *event)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 SDL_PumpEvents();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394
352
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
395 /* 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
396 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
397 return 0;
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
398 return 1;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 int SDL_WaitEvent (SDL_Event *event)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 while ( 1 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 SDL_PumpEvents();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 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
406 case -1: return 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 case 1: return 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 case 0: SDL_Delay(10);
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 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 int SDL_PushEvent(SDL_Event *event)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 {
384
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
415 if ( SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0) <= 0 )
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
416 return -1;
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
417 return 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 void SDL_SetEventFilter (SDL_EventFilter filter)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 SDL_Event bitbucket;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 /* Set filter and discard pending events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 SDL_EventOK = filter;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 SDL_EventFilter SDL_GetEventFilter(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 return(SDL_EventOK);
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 Uint8 SDL_EventState (Uint8 type, int state)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 SDL_Event bitbucket;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 Uint8 current_state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 /* If SDL_ALLEVENTS was specified... */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 if ( type == 0xFF ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 current_state = SDL_IGNORE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 for ( type=0; type<SDL_NUMEVENTS; ++type ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 if ( SDL_ProcessEvents[type] != SDL_IGNORE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 current_state = SDL_ENABLE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 SDL_ProcessEvents[type] = state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 if ( state == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 SDL_eventstate |= (0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 SDL_eventstate &= ~(0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 return(current_state);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 /* Just set the state for one event type */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 current_state = SDL_ProcessEvents[type];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 switch (state) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 case SDL_IGNORE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 case SDL_ENABLE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 /* Set state and discard pending events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 SDL_ProcessEvents[type] = state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 if ( state == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 SDL_eventstate |= (0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 SDL_eventstate &= ~(0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 /* Querying state? */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 return(current_state);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 /* This is a generic event handler.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 int SDL_PrivateSysWMEvent(SDL_SysWMmsg *message)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 int posted;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 posted = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 SDL_Event event;
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
490 SDL_memset(&event, 0, sizeof(event));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 event.type = SDL_SYSWMEVENT;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 event.syswm.msg = message;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
493 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 posted = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 SDL_PushEvent(&event);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498 /* Update internal event state */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
499 return(posted);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 }