Mercurial > sdl-ios-xcode
annotate src/thread/pth/SDL_syscond.c @ 821:30168104389f
Date: Sat, 14 Feb 2004 14:52:40 +0200
From: "Mike Gorchak"
Subject: Batch of the QNX6 fixes for the SDL
1. Updated readme.QNX
2. Fixed crashes during intensive window updating under fast machines (got over 200 rectangles for update).
3. Fixed double-buffered fullscreen modes, now it works as needed.
4. Fixed Photon detection algorithm.
5. Fixed HWSURFACE update function.
6. Added SDL_PHOTON_FULLSCREEN_REFRESH environment variable support for control refresh rates under Photon.
7. Added 640x400 fullscreen mode emulation via 640x480 (if videodriver not supports original 640x400 mode of course) shifted by 40 vertical pixels from begin, to center it. It's needed for some old DOS games which ran in doubled 320x200 mode.
8. Added available video ram amount support.
8. Added hardware surface allocation/deallocation support if current videomode and videodriver supports it.
9. Added hardware filling support.
10. Added hardware blits support (simple and colorkeyed).
And I've added to testvidinfo test color-keyed blits benchmark (maybe need to add alpha blits benchmark too ?). Currently Photon not supporting any alpha hardware blittings (all drivers lack of alpha blitting code support, only software alpha blitting exist in photon, which is hundreds times slowest than the SDL's one). So I've not added the alpha support. I suppose new QNX 6.3 will have the hardware alpha support, so when it will be done, I'll add alpha support.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 14 Feb 2004 20:22:21 +0000 |
parents | 1d74ddc90cb2 |
children | 3692456e7b0f |
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329
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1 /* |
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2 * GNU pth conditions variables |
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3 * |
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4 * Patrice Mandin |
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5 */ |
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6 |
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7 #include <stdio.h> |
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8 #include <stdlib.h> |
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9 #include <pth.h> |
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10 |
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11 #include "SDL_error.h" |
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12 #include "SDL_thread.h" |
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13 #include "SDL_syscond_c.h" |
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14 #include "SDL_sysmutex_c.h" |
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15 |
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16 /* Create a condition variable */ |
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17 SDL_cond * SDL_CreateCond(void) |
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18 { |
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19 SDL_cond *cond; |
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20 |
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21 cond = (SDL_cond *) malloc(sizeof(SDL_cond)); |
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22 if ( cond ) { |
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23 if ( pth_cond_init(&(cond->condpth_p)) < 0 ) { |
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24 SDL_SetError("pthread_cond_init() failed"); |
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25 free(cond); |
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26 cond = NULL; |
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27 } |
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28 } else { |
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29 SDL_OutOfMemory(); |
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30 } |
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31 return(cond); |
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32 } |
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33 |
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34 /* Destroy a condition variable */ |
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35 void SDL_DestroyCond(SDL_cond *cond) |
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36 { |
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37 if ( cond ) { |
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38 free(cond); |
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39 } |
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40 } |
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41 |
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42 /* Restart one of the threads that are waiting on the condition variable */ |
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43 int SDL_CondSignal(SDL_cond *cond) |
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44 { |
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45 int retval; |
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46 |
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47 if ( ! cond ) { |
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48 SDL_SetError("Passed a NULL condition variable"); |
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49 return -1; |
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50 } |
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51 |
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52 retval = 0; |
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53 if ( pth_cond_notify(&(cond->condpth_p), FALSE) != 0 ) { |
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54 SDL_SetError("pth_cond_notify() failed"); |
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55 retval = -1; |
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56 } |
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57 return retval; |
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58 } |
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59 |
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60 /* Restart all threads that are waiting on the condition variable */ |
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61 int SDL_CondBroadcast(SDL_cond *cond) |
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62 { |
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63 int retval; |
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64 |
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65 if ( ! cond ) { |
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66 SDL_SetError("Passed a NULL condition variable"); |
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67 return -1; |
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68 } |
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69 |
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70 retval = 0; |
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71 if ( pth_cond_notify(&(cond->condpth_p), TRUE) != 0 ) { |
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72 SDL_SetError("pth_cond_notify() failed"); |
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73 retval = -1; |
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74 } |
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75 return retval; |
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76 } |
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77 |
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78 /* Wait on the condition variable for at most 'ms' milliseconds. |
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79 The mutex must be locked before entering this function! |
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80 The mutex is unlocked during the wait, and locked again after the wait. |
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81 |
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82 Typical use: |
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83 |
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84 Thread A: |
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85 SDL_LockMutex(lock); |
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86 while ( ! condition ) { |
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87 SDL_CondWait(cond); |
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88 } |
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89 SDL_UnlockMutex(lock); |
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90 |
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91 Thread B: |
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92 SDL_LockMutex(lock); |
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93 ... |
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94 condition = true; |
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95 ... |
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96 SDL_UnlockMutex(lock); |
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97 */ |
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98 int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms) |
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99 { |
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100 int retval; |
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101 pth_event_t ev; |
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102 int sec; |
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103 |
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104 if ( ! cond ) { |
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105 SDL_SetError("Passed a NULL condition variable"); |
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106 return -1; |
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107 } |
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108 |
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109 retval = 0; |
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110 |
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111 sec = ms/1000; |
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112 ev = pth_event(PTH_EVENT_TIME, pth_timeout(sec,(ms-sec*1000)*1000)); |
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113 |
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114 if ( pth_cond_await(&(cond->condpth_p), &(mutex->mutexpth_p), ev) != 0 ) { |
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115 SDL_SetError("pth_cond_await() failed"); |
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116 retval = -1; |
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117 } |
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118 |
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119 pth_event_free(ev, PTH_FREE_ALL); |
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120 |
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121 return retval; |
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122 } |
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123 |
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124 /* Wait on the condition variable forever */ |
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125 int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex) |
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126 { |
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127 int retval; |
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128 |
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129 if ( ! cond ) { |
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130 SDL_SetError("Passed a NULL condition variable"); |
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131 return -1; |
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132 } |
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133 |
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134 retval = 0; |
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135 if ( pth_cond_await(&(cond->condpth_p), &(mutex->mutexpth_p), NULL) != 0 ) { |
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136 SDL_SetError("pth_cond_await() failed"); |
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137 retval = -1; |
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138 } |
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139 return retval; |
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140 } |