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annotate src/events/SDL_events.c @ 3259:22ac66da0765

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Merged Edgar's code changes from Google Summer of Code 2009
author Sam Lantinga <slouken@libsdl.org>
date Mon, 07 Sep 2009 05:06:34 +0000
parents 9da8f57ab92c
children 82ce350be859
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* General event handling code for SDL */
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25
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26 #include "SDL.h"
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27 #include "SDL_events.h"
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28 #include "SDL_syswm.h"
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29 #include "SDL_thread.h"
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30 #include "SDL_sysevents.h"
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31 #include "SDL_events_c.h"
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32 #include "../timer/SDL_timer_c.h"
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33 #if !SDL_JOYSTICK_DISABLED
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34 #include "../joystick/SDL_joystick_c.h"
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35 #endif
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36
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37 /* Public data -- the event filter */
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38 SDL_EventFilter SDL_EventOK = NULL;
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39 void *SDL_EventOKParam;
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40 Uint8 SDL_ProcessEvents[SDL_NUMEVENTS];
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41 static Uint32 SDL_eventstate = 0;
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42
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43 /* Private data -- event queue */
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44 #define MAXEVENTS 128
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45 static struct
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46 {
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47 SDL_mutex *lock;
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48 int active;
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49 int head;
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50 int tail;
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51 SDL_Event event[MAXEVENTS];
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52 int wmmsg_next;
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53 struct SDL_SysWMmsg wmmsg[MAXEVENTS];
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54 } SDL_EventQ;
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55
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56 /* Private data -- event locking structure */
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57 static struct
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58 {
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59 SDL_mutex *lock;
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60 int safe;
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61 } SDL_EventLock;
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62
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63 /* Thread functions */
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64 static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */
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65 static Uint32 event_thread; /* The event thread id */
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66
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67 void
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68 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
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79 void
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80 SDL_Unlock_EventThread(void)
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81 {
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82 if (SDL_EventThread && (SDL_ThreadID() != event_thread)) {
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83 SDL_mutexV(SDL_EventLock.lock);
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84 }
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85 }
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86
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87 #ifdef __OS2__
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88 /*
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89 * We'll increase the priority of GobbleEvents thread, so it will process
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90 * events in time for sure! For this, we need the DosSetPriority() API
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91 * from the os2.h include file.
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92 */
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93 #define INCL_DOSPROCESS
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94 #include <os2.h>
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95 #include <time.h>
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96 #endif
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97
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98 static int SDLCALL
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99 SDL_GobbleEvents(void *unused)
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100 {
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101 event_thread = SDL_ThreadID();
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102
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103 #ifdef __OS2__
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104 #ifdef USE_DOSSETPRIORITY
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105 /* Increase thread priority, so it will process events in time for sure! */
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106 DosSetPriority(PRTYS_THREAD, PRTYC_REGULAR, +16, 0);
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107 #endif
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108 #endif
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109
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110 while (SDL_EventQ.active) {
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111 SDL_VideoDevice *_this = SDL_GetVideoDevice();
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112
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113 /* Get events from the video subsystem */
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114 if (_this) {
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115 _this->PumpEvents(_this);
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116 }
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117 #if !SDL_JOYSTICK_DISABLED
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118 /* Check for joystick state change */
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119 if (SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK)) {
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120 SDL_JoystickUpdate();
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121 }
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122 #endif
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123
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124 /* Give up the CPU for the rest of our timeslice */
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125 SDL_EventLock.safe = 1;
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126 if (SDL_timer_running) {
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127 SDL_ThreadedTimerCheck();
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128 }
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129 SDL_Delay(1);
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130
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131 /* Check for event locking.
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132 On the P of the lock mutex, if the lock is held, this thread
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133 will wait until the lock is released before continuing. The
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134 safe flag will be set, meaning that the other thread can go
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135 about it's business. The safe flag is reset before the V,
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136 so as soon as the mutex is free, other threads can see that
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137 it's not safe to interfere with the event thread.
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138 */
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139 SDL_mutexP(SDL_EventLock.lock);
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140 SDL_EventLock.safe = 0;
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141 SDL_mutexV(SDL_EventLock.lock);
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142 }
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143 SDL_SetTimerThreaded(0);
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144 event_thread = 0;
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145 return (0);
0
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146 }
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147
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148 static int
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149 SDL_StartEventThread(Uint32 flags)
0
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150 {
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151 /* Reset everything to zero */
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152 SDL_EventThread = NULL;
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153 SDL_memset(&SDL_EventLock, 0, sizeof(SDL_EventLock));
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154
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155 /* Create the lock and set ourselves active */
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156 #if !SDL_THREADS_DISABLED
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157 SDL_EventQ.lock = SDL_CreateMutex();
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158 if (SDL_EventQ.lock == NULL) {
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159 return (-1);
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160 }
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161 #endif /* !SDL_THREADS_DISABLED */
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162 SDL_EventQ.active = 1;
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163
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164 if ((flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD) {
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165 SDL_EventLock.lock = SDL_CreateMutex();
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166 if (SDL_EventLock.lock == NULL) {
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167 return (-1);
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168 }
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169 SDL_EventLock.safe = 0;
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170
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171 /* The event thread will handle timers too */
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172 SDL_SetTimerThreaded(2);
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173 #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC)
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174 #undef SDL_CreateThread
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175 SDL_EventThread =
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176 SDL_CreateThread(SDL_GobbleEvents, NULL, NULL, NULL);
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177 #else
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178 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL);
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179 #endif
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180 if (SDL_EventThread == NULL) {
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181 return (-1);
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182 }
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183 } else {
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184 event_thread = 0;
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185 }
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186 return (0);
0
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187 }
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188
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189 static void
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190 SDL_StopEventThread(void)
0
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191 {
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192 SDL_EventQ.active = 0;
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193 if (SDL_EventThread) {
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194 SDL_WaitThread(SDL_EventThread, NULL);
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195 SDL_EventThread = NULL;
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196 SDL_DestroyMutex(SDL_EventLock.lock);
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197 }
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198 #ifndef IPOD
3259
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199 if (SDL_EventQ.lock) {
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200 SDL_DestroyMutex(SDL_EventQ.lock);
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201 SDL_EventQ.lock = NULL;
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202 }
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203 #endif
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204 }
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205
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206 Uint32
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207 SDL_EventThreadID(void)
0
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208 {
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209 return (event_thread);
0
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210 }
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211
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212 /* Public functions */
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213
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214 void
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215 SDL_StopEventLoop(void)
0
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216 {
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217 /* Halt the event thread, if running */
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218 SDL_StopEventThread();
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219
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220 /* Shutdown event handlers */
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221 SDL_KeyboardQuit();
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222 SDL_MouseQuit();
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223 SDL_QuitQuit();
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224
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225 /* Clean out EventQ */
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226 SDL_EventQ.head = 0;
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227 SDL_EventQ.tail = 0;
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228 SDL_EventQ.wmmsg_next = 0;
0
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229 }
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230
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231 /* This function (and associated calls) may be called more than once */
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232 int
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233 SDL_StartEventLoop(Uint32 flags)
0
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234 {
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235 int retcode;
0
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236
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237 /* Clean out the event queue */
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238 SDL_EventThread = NULL;
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239 SDL_EventQ.lock = NULL;
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240 SDL_StopEventLoop();
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241
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242 /* No filter to start with, process most event types */
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243 SDL_EventOK = NULL;
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244 SDL_memset(SDL_ProcessEvents, SDL_ENABLE, sizeof(SDL_ProcessEvents));
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245 SDL_eventstate = ~0;
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246 /* It's not save to call SDL_EventState() yet */
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247 SDL_eventstate &= ~(0x00000001 << SDL_SYSWMEVENT);
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248 SDL_ProcessEvents[SDL_SYSWMEVENT] = SDL_IGNORE;
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249
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250 /* Initialize event handlers */
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251 retcode = 0;
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252 retcode += SDL_KeyboardInit();
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253 retcode += SDL_MouseInit();
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254 retcode += SDL_QuitInit();
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255 if (retcode < 0) {
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256 /* We don't expect them to fail, but... */
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257 return (-1);
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diff changeset
258 }
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259
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260 /* Create the lock and event thread */
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261 if (SDL_StartEventThread(flags) < 0) {
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262 SDL_StopEventLoop();
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263 return (-1);
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diff changeset
264 }
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265 return (0);
0
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266 }
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267
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268
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269 /* Add an event to the event queue -- called with the queue locked */
1895
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270 static int
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diff changeset
271 SDL_AddEvent(SDL_Event * event)
0
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272 {
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273 int tail, added;
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274
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275 tail = (SDL_EventQ.tail + 1) % MAXEVENTS;
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276 if (tail == SDL_EventQ.head) {
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277 /* Overflow, drop event */
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278 added = 0;
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279 } else {
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280 SDL_EventQ.event[SDL_EventQ.tail] = *event;
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281 if (event->type == SDL_SYSWMEVENT) {
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282 /* Note that it's possible to lose an event */
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283 int next = SDL_EventQ.wmmsg_next;
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284 SDL_EventQ.wmmsg[next] = *event->syswm.msg;
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285 SDL_EventQ.event[SDL_EventQ.tail].syswm.msg =
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286 &SDL_EventQ.wmmsg[next];
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287 SDL_EventQ.wmmsg_next = (next + 1) % MAXEVENTS;
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288 }
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289 SDL_EventQ.tail = tail;
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290 added = 1;
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291 }
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292 return (added);
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293 }
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294
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295 /* Cut an event, and return the next valid spot, or the tail */
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296 /* -- called with the queue locked */
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297 static int
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298 SDL_CutEvent(int spot)
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299 {
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300 if (spot == SDL_EventQ.head) {
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301 SDL_EventQ.head = (SDL_EventQ.head + 1) % MAXEVENTS;
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302 return (SDL_EventQ.head);
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303 } else if ((spot + 1) % MAXEVENTS == SDL_EventQ.tail) {
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304 SDL_EventQ.tail = spot;
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305 return (SDL_EventQ.tail);
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306 } else
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307 /* We cut the middle -- shift everything over */
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308 {
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309 int here, next;
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310
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311 /* This can probably be optimized with SDL_memcpy() -- careful! */
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312 if (--SDL_EventQ.tail < 0) {
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313 SDL_EventQ.tail = MAXEVENTS - 1;
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314 }
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315 for (here = spot; here != SDL_EventQ.tail; here = next) {
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316 next = (here + 1) % MAXEVENTS;
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317 SDL_EventQ.event[here] = SDL_EventQ.event[next];
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318 }
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319 return (spot);
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320 }
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321 /* NOTREACHED */
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322 }
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323
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324 /* Lock the event queue, take a peep at it, and unlock it */
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325 int
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326 SDL_PeepEvents(SDL_Event * events, int numevents, SDL_eventaction action,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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327 Uint32 mask)
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328 {
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329 int i, used;
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330
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331 /* Don't look after we've quit */
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332 if (!SDL_EventQ.active) {
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333 return (-1);
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334 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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335 /* Lock the event queue */
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336 used = 0;
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337 if (SDL_mutexP(SDL_EventQ.lock) == 0) {
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338 if (action == SDL_ADDEVENT) {
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339 for (i = 0; i < numevents; ++i) {
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340 used += SDL_AddEvent(&events[i]);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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341 }
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342 } else {
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343 SDL_Event tmpevent;
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344 int spot;
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345
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346 /* If 'events' is NULL, just see if they exist */
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347 if (events == NULL) {
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348 action = SDL_PEEKEVENT;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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349 numevents = 1;
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350 events = &tmpevent;
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351 }
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352 spot = SDL_EventQ.head;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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353 while ((used < numevents) && (spot != SDL_EventQ.tail)) {
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354 if (mask & SDL_EVENTMASK(SDL_EventQ.event[spot].type)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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355 events[used++] = SDL_EventQ.event[spot];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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356 if (action == SDL_GETEVENT) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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357 spot = SDL_CutEvent(spot);
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358 } else {
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359 spot = (spot + 1) % MAXEVENTS;
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360 }
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361 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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362 spot = (spot + 1) % MAXEVENTS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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363 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
364 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
365 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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366 SDL_mutexV(SDL_EventQ.lock);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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367 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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368 SDL_SetError("Couldn't lock event queue");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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369 used = -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
370 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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371 return (used);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
372 }
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373
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
374 SDL_bool
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375 SDL_HasEvent(Uint32 mask)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
376 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
377 return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, mask) > 0);
0
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diff changeset
378 }
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diff changeset
379
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380 /* Run the system dependent event loops */
1895
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diff changeset
381 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
382 SDL_PumpEvents(void)
0
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diff changeset
383 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
384 if (!SDL_EventThread) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
385 SDL_VideoDevice *_this = SDL_GetVideoDevice();
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diff changeset
386
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
387 /* Get events from the video subsystem */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
388 if (_this) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
389 _this->PumpEvents(_this);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
390 }
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
391 #if !SDL_JOYSTICK_DISABLED
1895
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diff changeset
392 /* Check for joystick state change */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
393 if (SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
394 SDL_JoystickUpdate();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
395 }
0
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diff changeset
396 #endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
397 }
0
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diff changeset
398 }
74212992fb08 Initial revision
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parents:
diff changeset
399
74212992fb08 Initial revision
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parents:
diff changeset
400 /* Public functions */
74212992fb08 Initial revision
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parents:
diff changeset
401
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
402 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
403 SDL_PollEvent(SDL_Event * event)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 {
3072
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
405 return SDL_WaitEventTimeout(event, 0);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
406 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
408 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
409 SDL_WaitEvent(SDL_Event * event)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
410 {
3072
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
411 return SDL_WaitEventTimeout(event, -1);
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
412 }
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
413
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
414 int
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
415 SDL_WaitEventTimeout(SDL_Event * event, int timeout)
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
416 {
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
417 Uint32 expiration = 0;
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
418
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
419 if (timeout > 0)
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
420 expiration = SDL_GetTicks() + timeout;
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
421
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
422 for (;;) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
423 SDL_PumpEvents();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
424 switch (SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
425 case -1:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
426 return 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
427 case 1:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
428 return 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
429 case 0:
3072
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
430 if (timeout == 0) {
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
431 /* Polling and no events, just return */
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
432 return 0;
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
433 }
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
434 if (timeout > 0 && ((int) (SDL_GetTicks() - expiration) >= 0)) {
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
435 /* Timeout expired and no events */
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
436 return 0;
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
437 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
438 SDL_Delay(10);
3072
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2984
diff changeset
439 break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
440 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
441 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
444 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
445 SDL_PushEvent(SDL_Event * event)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
447 if (SDL_EventOK && !SDL_EventOK(SDL_EventOKParam, event)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
448 return 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
449 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
450 if (SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0) <= 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
451 return -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
452 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
453 return 1;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
456 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
457 SDL_SetEventFilter(SDL_EventFilter filter, void *userdata)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
459 SDL_Event bitbucket;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
460
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
461 /* Set filter and discard pending events */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
462 SDL_EventOK = filter;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
463 SDL_EventOKParam = userdata;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
464 while (SDL_PollEvent(&bitbucket) > 0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
467 SDL_bool
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
468 SDL_GetEventFilter(SDL_EventFilter * filter, void **userdata)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
470 if (filter) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
471 *filter = SDL_EventOK;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
472 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
473 if (userdata) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
474 *userdata = SDL_EventOKParam;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
475 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
476 return SDL_EventOK ? SDL_TRUE : SDL_FALSE;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
479 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
480 SDL_FilterEvents(SDL_EventFilter filter, void *userdata)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
482 if (SDL_mutexP(SDL_EventQ.lock) == 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
483 int spot;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
484
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
485 spot = SDL_EventQ.head;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
486 while (spot != SDL_EventQ.tail) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
487 if (filter(userdata, &SDL_EventQ.event[spot])) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
488 spot = (spot + 1) % MAXEVENTS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
489 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
490 spot = SDL_CutEvent(spot);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
491 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
492 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
493 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
494 SDL_mutexV(SDL_EventQ.lock);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
495 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
496
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
497 Uint8
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
498 SDL_EventState(Uint8 type, int state)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
499 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
500 SDL_Event bitbucket;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
501 Uint8 current_state;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
503 /* If SDL_ALLEVENTS was specified... */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
504 if (type == 0xFF) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
505 current_state = SDL_IGNORE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
506 for (type = 0; type < SDL_NUMEVENTS; ++type) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
507 if (SDL_ProcessEvents[type] != SDL_IGNORE) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
508 current_state = SDL_ENABLE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
509 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
510 SDL_ProcessEvents[type] = state;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
511 if (state == SDL_ENABLE) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
512 SDL_eventstate |= (0x00000001 << (type));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
513 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
514 SDL_eventstate &= ~(0x00000001 << (type));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
515 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
516 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
517 while (SDL_PollEvent(&bitbucket) > 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
518 return (current_state);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
519 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
521 /* Just set the state for one event type */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
522 current_state = SDL_ProcessEvents[type];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
523 switch (state) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
524 case SDL_IGNORE:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
525 case SDL_ENABLE:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
526 /* Set state and discard pending events */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
527 SDL_ProcessEvents[type] = state;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
528 if (state == SDL_ENABLE) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
529 SDL_eventstate |= (0x00000001 << (type));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
530 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
531 SDL_eventstate &= ~(0x00000001 << (type));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
532 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
533 while (SDL_PollEvent(&bitbucket) > 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
534 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
535 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1769
diff changeset
536 /* Querying state? */
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537 break;
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538 }
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539 return (current_state);
0
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540 }
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541
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542 /* This is a generic event handler.
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543 */
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544 int
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545 SDL_SendSysWMEvent(SDL_SysWMmsg * message)
0
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546 {
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547 int posted;
0
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548
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549 posted = 0;
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550 if (SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE) {
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551 SDL_Event event;
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552 SDL_memset(&event, 0, sizeof(event));
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553 event.type = SDL_SYSWMEVENT;
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554 event.syswm.msg = message;
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555 posted = (SDL_PushEvent(&event) > 0);
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556 }
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557 /* Update internal event state */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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558 return (posted);
0
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559 }
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560
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561 /* vi: set ts=4 sw=4 expandtab: */