annotate src/events/SDL_events.c @ 1330:450721ad5436

It's now possible to build SDL without any C runtime at all on Windows, using Visual C++ 2005
author Sam Lantinga <slouken@libsdl.org>
date Mon, 06 Feb 2006 08:28:51 +0000
parents c9b51268668f
children 3692456e7b0f
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
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23 /* General event handling code for SDL */
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24
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25 #include "SDL.h"
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26 #include "SDL_thread.h"
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27 #include "SDL_mutex.h"
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28 #include "SDL_events.h"
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29 #include "SDL_string.h"
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30 #include "SDL_events_c.h"
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31 #include "SDL_timer_c.h"
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32 #ifndef DISABLE_JOYSTICK
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33 #include "SDL_joystick_c.h"
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34 #endif
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35 #ifndef ENABLE_X11
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36 #define DISABLE_X11
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37 #endif
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38 #include "SDL_syswm.h"
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39 #include "SDL_sysevents.h"
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40
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41 /* Public data -- the event filter */
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42 SDL_EventFilter SDL_EventOK = NULL;
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43 Uint8 SDL_ProcessEvents[SDL_NUMEVENTS];
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44 static Uint32 SDL_eventstate = 0;
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45
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46 /* Private data -- event queue */
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47 #define MAXEVENTS 128
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48 static struct {
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49 SDL_mutex *lock;
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50 int active;
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51 int head;
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52 int tail;
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53 SDL_Event event[MAXEVENTS];
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54 int wmmsg_next;
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55 struct SDL_SysWMmsg wmmsg[MAXEVENTS];
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56 } SDL_EventQ;
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57
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58 /* Private data -- event locking structure */
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59 static struct {
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60 SDL_mutex *lock;
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61 int safe;
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62 } SDL_EventLock;
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63
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64 /* Thread functions */
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65 static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */
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66 static Uint32 event_thread; /* The event thread id */
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67
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68 void SDL_Lock_EventThread(void)
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69 {
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70 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) {
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71 /* Grab lock and spin until we're sure event thread stopped */
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72 SDL_mutexP(SDL_EventLock.lock);
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73 while ( ! SDL_EventLock.safe ) {
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74 SDL_Delay(1);
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75 }
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76 }
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77 }
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78 void SDL_Unlock_EventThread(void)
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79 {
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80 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) {
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81 SDL_mutexV(SDL_EventLock.lock);
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82 }
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83 }
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84
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85 #ifdef __OS2__
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86 /*
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87 * We'll increase the priority of GobbleEvents thread, so it will process
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88 * events in time for sure! For this, we need the DosSetPriority() API
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89 * from the os2.h include file.
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90 */
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91 #define INCL_DOSPROCESS
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92 #include <os2.h>
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93 #include <time.h>
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94 #endif
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95
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96 static int SDL_GobbleEvents(void *unused)
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97 {
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98 event_thread = SDL_ThreadID();
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99
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100 #ifdef __OS2__
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101 #ifdef USE_DOSSETPRIORITY
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102 /* Increase thread priority, so it will process events in time for sure! */
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103 DosSetPriority(PRTYS_THREAD, PRTYC_REGULAR, +16, 0);
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104 #endif
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105 #endif
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106
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107 while ( SDL_EventQ.active ) {
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108 SDL_VideoDevice *video = current_video;
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109 SDL_VideoDevice *this = current_video;
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110
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111 /* Get events from the video subsystem */
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112 if ( video ) {
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113 video->PumpEvents(this);
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114 }
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115
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116 /* Queue pending key-repeat events */
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117 SDL_CheckKeyRepeat();
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118
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119 #ifndef DISABLE_JOYSTICK
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120 /* Check for joystick state change */
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121 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) {
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122 SDL_JoystickUpdate();
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123 }
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124 #endif
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125
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126 /* Give up the CPU for the rest of our timeslice */
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127 SDL_EventLock.safe = 1;
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128 if ( SDL_timer_running ) {
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129 SDL_ThreadedTimerCheck();
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130 }
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131 SDL_Delay(1);
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132
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133 /* Check for event locking.
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134 On the P of the lock mutex, if the lock is held, this thread
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135 will wait until the lock is released before continuing. The
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136 safe flag will be set, meaning that the other thread can go
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137 about it's business. The safe flag is reset before the V,
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138 so as soon as the mutex is free, other threads can see that
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139 it's not safe to interfere with the event thread.
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140 */
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141 SDL_mutexP(SDL_EventLock.lock);
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142 SDL_EventLock.safe = 0;
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143 SDL_mutexV(SDL_EventLock.lock);
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144 }
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145 SDL_SetTimerThreaded(0);
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146 event_thread = 0;
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147 return(0);
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148 }
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149
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150 static int SDL_StartEventThread(Uint32 flags)
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151 {
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152 /* Reset everything to zero */
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153 SDL_EventThread = NULL;
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154 memset(&SDL_EventLock, 0, sizeof(SDL_EventLock));
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155
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156 /* Create the lock and set ourselves active */
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157 #ifndef DISABLE_THREADS
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158 SDL_EventQ.lock = SDL_CreateMutex();
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159 if ( SDL_EventQ.lock == NULL ) {
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160 #ifdef macintosh /* On MacOS 7/8, you can't multithread, so no lock needed */
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161 ;
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162 #else
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163 return(-1);
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164 #endif
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165 }
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166 #endif /* !DISABLE_THREADS */
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167 SDL_EventQ.active = 1;
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168
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169 if ( (flags&SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) {
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170 SDL_EventLock.lock = SDL_CreateMutex();
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171 if ( SDL_EventLock.lock == NULL ) {
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172 return(-1);
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173 }
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174 SDL_EventLock.safe = 0;
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175
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5ba65305c954 Fix various problems with the timer code.
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176 /* The event thread will handle timers too */
5ba65305c954 Fix various problems with the timer code.
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177 SDL_SetTimerThreaded(2);
1330
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178 #if (defined(_WIN32) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC)
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
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179 #undef SDL_CreateThread
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180 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL, NULL, NULL);
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181 #else
0
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182 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL);
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183 #endif
0
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184 if ( SDL_EventThread == NULL ) {
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185 return(-1);
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186 }
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187 } else {
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188 event_thread = 0;
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189 }
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190 return(0);
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191 }
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192
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193 static void SDL_StopEventThread(void)
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194 {
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195 SDL_EventQ.active = 0;
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196 if ( SDL_EventThread ) {
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197 SDL_WaitThread(SDL_EventThread, NULL);
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198 SDL_EventThread = NULL;
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199 SDL_DestroyMutex(SDL_EventLock.lock);
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200 }
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af8b0f9ac2f4 iPod Linux framebuffer support.
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201 #ifndef IPOD
0
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202 SDL_DestroyMutex(SDL_EventQ.lock);
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203 #endif
0
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204 }
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205
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206 Uint32 SDL_EventThreadID(void)
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207 {
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208 return(event_thread);
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209 }
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210
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211 /* Public functions */
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212
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213 void SDL_StopEventLoop(void)
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214 {
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215 /* Halt the event thread, if running */
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216 SDL_StopEventThread();
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217
1123
28ac87a38c17 Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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218 /* Shutdown event handlers */
28ac87a38c17 Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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219 SDL_AppActiveQuit();
28ac87a38c17 Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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220 SDL_KeyboardQuit();
28ac87a38c17 Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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221 SDL_MouseQuit();
28ac87a38c17 Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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222 SDL_QuitQuit();
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223
0
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224 /* Clean out EventQ */
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225 SDL_EventQ.head = 0;
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226 SDL_EventQ.tail = 0;
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227 SDL_EventQ.wmmsg_next = 0;
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228 }
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229
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230 /* This function (and associated calls) may be called more than once */
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231 int SDL_StartEventLoop(Uint32 flags)
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232 {
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233 int retcode;
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234
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235 /* Clean out the event queue */
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236 SDL_EventThread = NULL;
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237 SDL_EventQ.lock = NULL;
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238 SDL_StopEventLoop();
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239
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240 /* No filter to start with, process most event types */
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241 SDL_EventOK = NULL;
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242 memset(SDL_ProcessEvents,SDL_ENABLE,sizeof(SDL_ProcessEvents));
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243 SDL_eventstate = ~0;
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244 /* It's not save to call SDL_EventState() yet */
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245 SDL_eventstate &= ~(0x00000001 << SDL_SYSWMEVENT);
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246 SDL_ProcessEvents[SDL_SYSWMEVENT] = SDL_IGNORE;
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247
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248 /* Initialize event handlers */
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249 retcode = 0;
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250 retcode += SDL_AppActiveInit();
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251 retcode += SDL_KeyboardInit();
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252 retcode += SDL_MouseInit();
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253 retcode += SDL_QuitInit();
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diff changeset
254 if ( retcode < 0 ) {
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diff changeset
255 /* We don't expect them to fail, but... */
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diff changeset
256 return(-1);
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diff changeset
257 }
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diff changeset
258
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259 /* Create the lock and event thread */
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diff changeset
260 if ( SDL_StartEventThread(flags) < 0 ) {
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261 SDL_StopEventLoop();
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262 return(-1);
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parents:
diff changeset
263 }
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264 return(0);
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diff changeset
265 }
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266
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diff changeset
267
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268 /* Add an event to the event queue -- called with the queue locked */
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diff changeset
269 static int SDL_AddEvent(SDL_Event *event)
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270 {
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271 int tail, added;
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272
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273 tail = (SDL_EventQ.tail+1)%MAXEVENTS;
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diff changeset
274 if ( tail == SDL_EventQ.head ) {
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parents:
diff changeset
275 /* Overflow, drop event */
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diff changeset
276 added = 0;
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diff changeset
277 } else {
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diff changeset
278 SDL_EventQ.event[SDL_EventQ.tail] = *event;
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diff changeset
279 if (event->type == SDL_SYSWMEVENT) {
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parents:
diff changeset
280 /* Note that it's possible to lose an event */
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diff changeset
281 int next = SDL_EventQ.wmmsg_next;
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diff changeset
282 SDL_EventQ.wmmsg[next] = *event->syswm.msg;
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diff changeset
283 SDL_EventQ.event[SDL_EventQ.tail].syswm.msg =
74212992fb08 Initial revision
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diff changeset
284 &SDL_EventQ.wmmsg[next];
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diff changeset
285 SDL_EventQ.wmmsg_next = (next+1)%MAXEVENTS;
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parents:
diff changeset
286 }
74212992fb08 Initial revision
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diff changeset
287 SDL_EventQ.tail = tail;
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diff changeset
288 added = 1;
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diff changeset
289 }
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diff changeset
290 return(added);
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parents:
diff changeset
291 }
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diff changeset
292
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diff changeset
293 /* Cut an event, and return the next valid spot, or the tail */
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parents:
diff changeset
294 /* -- called with the queue locked */
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parents:
diff changeset
295 static int SDL_CutEvent(int spot)
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parents:
diff changeset
296 {
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parents:
diff changeset
297 if ( spot == SDL_EventQ.head ) {
74212992fb08 Initial revision
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diff changeset
298 SDL_EventQ.head = (SDL_EventQ.head+1)%MAXEVENTS;
74212992fb08 Initial revision
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parents:
diff changeset
299 return(SDL_EventQ.head);
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parents:
diff changeset
300 } else
74212992fb08 Initial revision
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parents:
diff changeset
301 if ( (spot+1)%MAXEVENTS == SDL_EventQ.tail ) {
74212992fb08 Initial revision
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parents:
diff changeset
302 SDL_EventQ.tail = spot;
74212992fb08 Initial revision
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parents:
diff changeset
303 return(SDL_EventQ.tail);
74212992fb08 Initial revision
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parents:
diff changeset
304 } else
74212992fb08 Initial revision
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parents:
diff changeset
305 /* We cut the middle -- shift everything over */
74212992fb08 Initial revision
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parents:
diff changeset
306 {
74212992fb08 Initial revision
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parents:
diff changeset
307 int here, next;
74212992fb08 Initial revision
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parents:
diff changeset
308
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parents:
diff changeset
309 /* This can probably be optimized with memcpy() -- careful! */
74212992fb08 Initial revision
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parents:
diff changeset
310 if ( --SDL_EventQ.tail < 0 ) {
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parents:
diff changeset
311 SDL_EventQ.tail = MAXEVENTS-1;
74212992fb08 Initial revision
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parents:
diff changeset
312 }
74212992fb08 Initial revision
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parents:
diff changeset
313 for ( here=spot; here != SDL_EventQ.tail; here = next ) {
74212992fb08 Initial revision
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parents:
diff changeset
314 next = (here+1)%MAXEVENTS;
74212992fb08 Initial revision
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parents:
diff changeset
315 SDL_EventQ.event[here] = SDL_EventQ.event[next];
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parents:
diff changeset
316 }
74212992fb08 Initial revision
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parents:
diff changeset
317 return(spot);
74212992fb08 Initial revision
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parents:
diff changeset
318 }
74212992fb08 Initial revision
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parents:
diff changeset
319 /* NOTREACHED */
74212992fb08 Initial revision
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parents:
diff changeset
320 }
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parents:
diff changeset
321
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diff changeset
322 /* Lock the event queue, take a peep at it, and unlock it */
74212992fb08 Initial revision
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parents:
diff changeset
323 int SDL_PeepEvents(SDL_Event *events, int numevents, SDL_eventaction action,
74212992fb08 Initial revision
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parents:
diff changeset
324 Uint32 mask)
74212992fb08 Initial revision
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parents:
diff changeset
325 {
74212992fb08 Initial revision
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parents:
diff changeset
326 int i, used;
74212992fb08 Initial revision
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parents:
diff changeset
327
74212992fb08 Initial revision
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parents:
diff changeset
328 /* Don't look after we've quit */
74212992fb08 Initial revision
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parents:
diff changeset
329 if ( ! SDL_EventQ.active ) {
276
8af85680ca0a Updated the documentation for the SDL_PushEvent() call.
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
330 return(-1);
0
74212992fb08 Initial revision
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parents:
diff changeset
331 }
74212992fb08 Initial revision
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parents:
diff changeset
332 /* Lock the event queue */
74212992fb08 Initial revision
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parents:
diff changeset
333 used = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 if ( SDL_mutexP(SDL_EventQ.lock) == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 if ( action == SDL_ADDEVENT ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 for ( i=0; i<numevents; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 used += SDL_AddEvent(&events[i]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 SDL_Event tmpevent;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 int spot;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 /* If 'events' is NULL, just see if they exist */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 if ( events == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 action = SDL_PEEKEVENT;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 numevents = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 events = &tmpevent;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 spot = SDL_EventQ.head;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 while ((used < numevents)&&(spot != SDL_EventQ.tail)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 if ( mask & SDL_EVENTMASK(SDL_EventQ.event[spot].type) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 events[used++] = SDL_EventQ.event[spot];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 if ( action == SDL_GETEVENT ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 spot = SDL_CutEvent(spot);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 spot = (spot+1)%MAXEVENTS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 }
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 spot = (spot+1)%MAXEVENTS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 SDL_mutexV(SDL_EventQ.lock);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 SDL_SetError("Couldn't lock event queue");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 used = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 return(used);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 /* Run the system dependent event loops */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 void SDL_PumpEvents(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 if ( !SDL_EventThread ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 /* Get events from the video subsystem */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 if ( video ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380 video->PumpEvents(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 /* Queue pending key-repeat events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 SDL_CheckKeyRepeat();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 #ifndef DISABLE_JOYSTICK
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 /* Check for joystick state change */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 SDL_JoystickUpdate();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 /* Public functions */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 int SDL_PollEvent (SDL_Event *event)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 SDL_PumpEvents();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400
352
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
401 /* 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
402 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
403 return 0;
b49fc922e7f6 Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
404 return 1;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 int SDL_WaitEvent (SDL_Event *event)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 while ( 1 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 SDL_PumpEvents();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 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
412 case -1: return 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 case 1: return 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 case 0: SDL_Delay(10);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 int SDL_PushEvent(SDL_Event *event)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 {
384
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
421 if ( SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0) <= 0 )
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
422 return -1;
1870bb49ab18 Almost... :)
Sam Lantinga <slouken@libsdl.org>
parents: 383
diff changeset
423 return 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 void SDL_SetEventFilter (SDL_EventFilter filter)
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_Event bitbucket;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 /* Set filter and discard pending events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 SDL_EventOK = filter;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 while ( SDL_PollEvent(&bitbucket) > 0 )
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
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 SDL_EventFilter SDL_GetEventFilter(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 return(SDL_EventOK);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 Uint8 SDL_EventState (Uint8 type, int state)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 SDL_Event bitbucket;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 Uint8 current_state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 /* If SDL_ALLEVENTS was specified... */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 if ( type == 0xFF ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 current_state = SDL_IGNORE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 for ( type=0; type<SDL_NUMEVENTS; ++type ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 if ( SDL_ProcessEvents[type] != SDL_IGNORE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 current_state = SDL_ENABLE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 SDL_ProcessEvents[type] = state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 if ( state == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 SDL_eventstate |= (0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 SDL_eventstate &= ~(0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 return(current_state);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 /* Just set the state for one event type */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 current_state = SDL_ProcessEvents[type];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 switch (state) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 case SDL_IGNORE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 case SDL_ENABLE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 /* Set state and discard pending events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 SDL_ProcessEvents[type] = state;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 if ( state == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 SDL_eventstate |= (0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 SDL_eventstate &= ~(0x00000001 << (type));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 while ( SDL_PollEvent(&bitbucket) > 0 )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 ;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 /* Querying state? */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 return(current_state);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 /* This is a generic event handler.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 int SDL_PrivateSysWMEvent(SDL_SysWMmsg *message)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 int posted;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
493 posted = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 SDL_Event event;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 memset(&event, 0, sizeof(event));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 event.type = SDL_SYSWMEVENT;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498 event.syswm.msg = message;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
499 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 posted = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
501 SDL_PushEvent(&event);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
503 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504 /* Update internal event state */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505 return(posted);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 }