sdl-ios-xcode: src/thread/nds/SDL

annotate src/thread/nds/SDL_syssem.c @ 4866:f42e8db53f78

Added a typedef for the thread function to simplify documentation

author	Sam Lantinga <slouken@libsdl.org>
date	Sat, 28 Aug 2010 22:56:52 -0700
parents	f7b03b6838cb
children	b530ef003506

rev	line source
2735 204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	1 /*
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	2 SDL - Simple DirectMedia Layer
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	3 Copyright (C) 1997-2010 Sam Lantinga
2735 204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	4
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	5 This library is free software; you can redistribute it and/or
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	6 modify it under the terms of the GNU Lesser General Public
2735 204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	7 License as published by the Free Software Foundation; either
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	8 version 2.1 of the License, or (at your option) any later version.
2735 204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	9
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	13 Lesser General Public License for more details.
2735 204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	14
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	15 You should have received a copy of the GNU Lesser General Public
f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	16 License along with this library; if not, write to the Free Software
f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
2735 204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	18
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	19 Sam Lantinga
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	20 slouken@libsdl.org
2735 204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	21 */
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	22
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	23 #ifdef SAVE_RCSID
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	24 static char rcsid =
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	25 "@(#) $Id: SDL_syssem.c,v 1.2 2001/04/26 16:50:18 hercules Exp $";
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	26 #endif
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	27
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	28 /* An implementation of semaphores using mutexes and condition variables */
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	29
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	30 #include <stdlib.h>
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	31
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	32 #include "SDL_error.h"
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	33 #include "SDL_timer.h"
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	34 #include "SDL_thread.h"
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	35 #include "SDL_systhread_c.h"
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	36
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	37
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	38 #ifdef DISABLE_THREADS
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	39
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	40 SDL_sem *
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	41 SDL_CreateSemaphore(Uint32 initial_value)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	42 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	43 SDL_SetError("SDL not configured with thread support");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	44 return (SDL_sem *) 0;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	45 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	46
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	47 void
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	48 SDL_DestroySemaphore(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	49 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	50 return;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	51 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	52
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	53 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	54 SDL_SemTryWait(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	55 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	56 SDL_SetError("SDL not configured with thread support");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	57 return -1;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	58 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	59
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	60 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	61 SDL_SemWaitTimeout(SDL_sem * sem, Uint32 timeout)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	62 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	63 SDL_SetError("SDL not configured with thread support");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	64 return -1;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	65 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	66
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	67 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	68 SDL_SemWait(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	69 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	70 SDL_SetError("SDL not configured with thread support");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	71 return -1;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	72 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	73
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	74 Uint32
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	75 SDL_SemValue(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	76 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	77 return 0;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	78 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	79
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	80 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	81 SDL_SemPost(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	82 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	83 SDL_SetError("SDL not configured with thread support");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	84 return -1;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	85 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	86
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	87 #else
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	88
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	89 struct SDL_semaphore
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	90 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	91 Uint32 count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	92 Uint32 waiters_count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	93 SDL_mutex *count_lock;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	94 SDL_cond *count_nonzero;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	95 };
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	96
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	97 SDL_sem *
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	98 SDL_CreateSemaphore(Uint32 initial_value)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	99 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	100 SDL_sem *sem;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	101
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	102 sem = (SDL_sem ) malloc(sizeof(sem));
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	103 if (!sem) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	104 SDL_OutOfMemory();
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	105 return (0);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	106 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	107 sem->count = initial_value;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	108 sem->waiters_count = 0;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	109
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	110 sem->count_lock = SDL_CreateMutex();
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	111 sem->count_nonzero = SDL_CreateCond();
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	112 if (!sem->count_lock \|\| !sem->count_nonzero) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	113 SDL_DestroySemaphore(sem);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	114 return (0);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	115 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	116
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	117 return (sem);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	118 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	119
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	120 /* WARNING:
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	121 You cannot call this function when another thread is using the semaphore.
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	122 */
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	123 void
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	124 SDL_DestroySemaphore(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	125 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	126 if (sem) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	127 sem->count = 0xFFFFFFFF;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	128 while (sem->waiters_count > 0) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	129 SDL_CondSignal(sem->count_nonzero);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	130 SDL_Delay(10);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	131 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	132 SDL_DestroyCond(sem->count_nonzero);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	133 SDL_mutexP(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	134 SDL_mutexV(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	135 SDL_DestroyMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	136 free(sem);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	137 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	138 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	139
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	140 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	141 SDL_SemTryWait(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	142 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	143 int retval;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	144
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	145 if (!sem) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	146 SDL_SetError("Passed a NULL semaphore");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	147 return -1;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	148 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	149
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	150 retval = SDL_MUTEX_TIMEDOUT;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	151 SDL_LockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	152 if (sem->count > 0) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	153 --sem->count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	154 retval = 0;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	155 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	156 SDL_UnlockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	157
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	158 return retval;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	159 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	160
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	161 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	162 SDL_SemWaitTimeout(SDL_sem * sem, Uint32 timeout)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	163 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	164 int retval;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	165
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	166 if (!sem) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	167 SDL_SetError("Passed a NULL semaphore");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	168 return -1;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	169 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	170
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	171 /* A timeout of 0 is an easy case */
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	172 if (timeout == 0) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	173 return SDL_SemTryWait(sem);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	174 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	175
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	176 SDL_LockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	177 ++sem->waiters_count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	178 retval = 0;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	179 while ((sem->count == 0) && (retval != SDL_MUTEX_TIMEDOUT)) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	180 retval = SDL_CondWaitTimeout(sem->count_nonzero,
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	181 sem->count_lock, timeout);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	182 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	183 --sem->waiters_count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	184 --sem->count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	185 SDL_UnlockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	186
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	187 return retval;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	188 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	189
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	190 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	191 SDL_SemWait(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	192 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	193 return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	194 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	195
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	196 Uint32
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	197 SDL_SemValue(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	198 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	199 Uint32 value;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	200
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	201 value = 0;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	202 if (sem) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	203 SDL_LockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	204 value = sem->count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	205 SDL_UnlockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	206 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	207 return value;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	208 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	209
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	210 int
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	211 SDL_SemPost(SDL_sem * sem)
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	212 {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	213 if (!sem) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	214 SDL_SetError("Passed a NULL semaphore");
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	215 return -1;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	216 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	217
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	218 SDL_LockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	219 if (sem->waiters_count > 0) {
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	220 SDL_CondSignal(sem->count_nonzero);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	221 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	222 ++sem->count;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	223 SDL_UnlockMutex(sem->count_lock);
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	224
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	225 return 0;
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	226 }
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	227
204be4fc2726 Final merge of Google Summer of Code 2008 work... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	228 #endif /* DISABLE_THREADS */

Mercurial > sdl-ios-xcode

annotate src/thread/nds/SDL_syssem.c @ 4866:f42e8db53f78