Mercurial > sdl-ios-xcode
annotate src/thread/amigaos/SDL_syssem.c @ 1565:57431b199aed
Fixed bug #52
Integrated most of the NetBSD and DragonFly patches at:
ftp://ftp.netbsd.org/pub/NetBSD/packages/pkgsrc/devel/SDL/patches/
Thanks to Thomas Klausner for defailed information on the patches
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 21 Mar 2006 08:54:50 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
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diff
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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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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252
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Updated the source with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 21 */ |
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Use consistent identifiers for the various platforms we support.
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22 #include "SDL_config.h" |
| 0 | 23 |
|
21
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Updated the Amiga OS port of SDL (thanks Gabriele)
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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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Use SDL_ prefixed versions of C library functions.
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43 sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); |
|
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75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
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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:
1312
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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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Use SDL_ prefixed versions of C library functions.
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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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75a95f82bc1f
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Sam Lantinga <slouken@lokigames.com>
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80 |
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75a95f82bc1f
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Sam Lantinga <slouken@lokigames.com>
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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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75a95f82bc1f
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Sam Lantinga <slouken@lokigames.com>
parents:
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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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75a95f82bc1f
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Sam Lantinga <slouken@lokigames.com>
parents:
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changeset
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96 /* A timeout of 0 is an easy case */ |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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97 if ( timeout == 0 ) { |
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1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
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98 ObtainSemaphore(&sem->Sem); |
|
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
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99 return 1; |
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21
75a95f82bc1f
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Sam Lantinga <slouken@lokigames.com>
parents:
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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 |