Mercurial > sdl-ios-xcode
annotate src/thread/amigaos/SDL_syssem.c @ 1768:814f9f2c7a33
Fixed bug #80
Date: 21 Apr 2003 17:20:20 +0100
From: Alan Swanson <swanson@uklinux.net>
Subject: [SDL] New XFree 4.3 Video Mode Patch
If you look at the unsorted list of modes returned by X, here's mine;
1280 x 1024 @ 85.0 >
1024 x 768 @ 100.3 > USER
800 x 600 @ 125.5 > SET
640 x 480 @ 124.9 >
1280 x 1024 @ 75.0 ]
1280 x 1024 @ 60.0 ]
1280 x 960 @ 85.0 ] X11
1280 x 960 @ 60.0 ] AUTO
1152 x 864 @ 75.0 ]=20
1152 x 768 @ 54.8 ]
960 x 720 @ 120.0 ]
...
640 x 400 @ 85.1 ] 256k
576 x 432 @ 150.0 ] 249k PIXEL
640 x 350 @ 85.1 ] 224k COUNT
576 x 384 @ 109.6 ] 221k
...
The user set modes come first followed by X set modes which are ordered
by decreasing number of pixels and refresh.
The reason why every other library or program not using SDL working is
due to SDL scanning the modes in reverse getting X11 provided modes
modes with the lowest refresh.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 05 May 2006 05:50:26 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 |
| 0 | 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. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
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parents:
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15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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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 |
| 0 | 18 |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
|
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22 #include "SDL_config.h" |
| 0 | 23 |
|
21
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24 /* An implementation of semaphores using mutexes and condition variables */ |
| 0 | 25 |
| 26 #include "SDL_thread.h" | |
| 27 #include "SDL_systhread_c.h" | |
| 28 | |
| 29 | |
| 30 struct SDL_semaphore | |
| 31 { | |
| 32 struct SignalSemaphore Sem; | |
| 33 }; | |
| 34 | |
|
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35 #undef D |
| 0 | 36 |
| 37 #define D(x) | |
| 38 | |
| 39 SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) | |
| 40 { | |
| 41 SDL_sem *sem; | |
| 42 | |
|
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43 sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); |
|
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44 |
| 0 | 45 if ( ! sem ) { |
| 46 SDL_OutOfMemory(); | |
| 47 return(0); | |
| 48 } | |
| 49 | |
| 50 D(bug("Creating semaphore %lx...\n",sem)); | |
| 51 | |
|
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parents:
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52 SDL_memset(sem,0,sizeof(*sem)); |
|
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53 |
| 0 | 54 InitSemaphore(&sem->Sem); |
|
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55 |
| 0 | 56 return(sem); |
| 57 } | |
| 58 | |
| 59 void SDL_DestroySemaphore(SDL_sem *sem) | |
| 60 { | |
| 61 D(bug("Destroying semaphore %lx...\n",sem)); | |
| 62 | |
| 63 if ( sem ) { | |
| 64 // Condizioni per liberare i task in attesa? | |
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parents:
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65 SDL_free(sem); |
| 0 | 66 } |
| 67 } | |
| 68 | |
| 69 int SDL_SemTryWait(SDL_sem *sem) | |
| 70 { | |
| 71 if ( ! sem ) { | |
| 72 SDL_SetError("Passed a NULL semaphore"); | |
| 73 return -1; | |
| 74 } | |
| 75 | |
| 76 D(bug("TryWait semaphore...%lx\n",sem)); | |
| 77 | |
|
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78 ObtainSemaphore(&sem->Sem); |
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79 // ReleaseSemaphore(&sem->Sem); |
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80 |
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81 return 1; |
| 0 | 82 } |
| 83 | |
| 84 int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) | |
| 85 { | |
| 86 int retval; | |
| 87 | |
|
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88 |
| 0 | 89 if ( ! sem ) { |
| 90 SDL_SetError("Passed a NULL semaphore"); | |
| 91 return -1; | |
| 92 } | |
| 93 | |
| 94 D(bug("WaitTimeout (%ld) semaphore...%lx\n",timeout,sem)); | |
| 95 | |
|
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96 /* A timeout of 0 is an easy case */ |
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97 if ( timeout == 0 ) { |
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98 ObtainSemaphore(&sem->Sem); |
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99 return 1; |
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100 } |
| 0 | 101 if(!(retval=AttemptSemaphore(&sem->Sem))) |
| 102 { | |
| 103 SDL_Delay(timeout); | |
| 104 retval=AttemptSemaphore(&sem->Sem); | |
| 105 } | |
| 106 | |
| 107 if(retval==TRUE) | |
| 108 { | |
| 109 // ReleaseSemaphore(&sem->Sem); | |
| 110 retval=1; | |
| 111 } | |
|
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112 |
| 0 | 113 return retval; |
| 114 } | |
| 115 | |
| 116 int SDL_SemWait(SDL_sem *sem) | |
| 117 { | |
| 118 ObtainSemaphore(&sem->Sem); | |
|
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119 return 0; |
| 0 | 120 } |
| 121 | |
| 122 Uint32 SDL_SemValue(SDL_sem *sem) | |
| 123 { | |
| 124 Uint32 value; | |
|
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125 |
| 0 | 126 value = 0; |
| 127 if ( sem ) { | |
|
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128 #ifdef STORMC4_WOS |
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129 value = sem->Sem.ssppc_SS.ss_NestCount; |
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130 #else |
| 0 | 131 value = sem->Sem.ss_NestCount; |
|
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132 #endif |
| 0 | 133 } |
| 134 return value; | |
| 135 } | |
| 136 | |
| 137 int SDL_SemPost(SDL_sem *sem) | |
| 138 { | |
| 139 if ( ! sem ) { | |
| 140 SDL_SetError("Passed a NULL semaphore"); | |
| 141 return -1; | |
| 142 } | |
| 143 D(bug("SemPost semaphore...%lx\n",sem)); | |
| 144 | |
| 145 ReleaseSemaphore(&sem->Sem); | |
| 146 return 0; | |
| 147 } | |
| 148 |