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

annotate src/thread/riscos/SDL_sysmutex.c @ 4347:38f22ed3a433 SDL-1.2

Option to fix bug #851 For some people setting the period size works better (and is what SDL 1.2.13 did), but for most people it's the same or worse. You can use an environment variable to pick which one you want.

author	Sam Lantinga <slouken@libsdl.org>
date	Sat, 17 Oct 2009 06:55:17 +0000
parents	a1b03ba2fcd0
children

rev	line source
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	1 /*
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	2 SDL - Simple DirectMedia Layer
4159 a1b03ba2fcd0 Updated copyright date Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	3 Copyright (C) 1997-2009 Sam Lantinga
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	4
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	5 This library is free software; you can redistribute it and/or
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 955 diff changeset	6 modify it under the terms of the GNU Lesser General Public
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	7 License as published by the Free Software Foundation; either
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 955 diff changeset	8 version 2.1 of the License, or (at your option) any later version.
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	9
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 955 diff changeset	13 Lesser General Public License for more details.
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	14
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 955 diff changeset	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: 955 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: 955 diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	18
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	19 Sam Lantinga
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	20 slouken@libsdl.org
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	21 */
1402 d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1361 diff changeset	22 #include "SDL_config.h"
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	23
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	24 /* RISC OS implementations uses pthreads based on linux code */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	25
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	26 #include "SDL_thread.h"
19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	27
19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	28 #if SDL_THREADS_DISABLED
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	29 #include "../generic/SDL_sysmutex.c"
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	30 #else
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	31
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	32 #include <pthread.h>
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	33
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	34 struct SDL_mutex {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	35 pthread_mutex_t id;
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	36 #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	37 int recursive;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	38 pthread_t owner;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	39 #endif
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	40 };
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	41
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	42 SDL_mutex *SDL_CreateMutex (void)
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	43 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	44 SDL_mutex *mutex;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	45 pthread_mutexattr_t attr;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	46
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	47 /* Allocate the structure */
1338 604d73db6802 Removed uses of stdlib.h and string.h Sam Lantinga <slouken@libsdl.org> parents: 1336 diff changeset	48 mutex = (SDL_mutex )SDL_calloc(1, sizeof(mutex));
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	49 if ( mutex ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	50 pthread_mutexattr_init(&attr);
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	51 #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	52 /* No extra attributes necessary */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	53 #else
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	54 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	55 #endif /* SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX */
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	56 if ( pthread_mutex_init(&mutex->id, &attr) != 0 ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	57 SDL_SetError("pthread_mutex_init() failed");
1336 3692456e7b0f Use SDL_ prefixed versions of C library functions. Sam Lantinga <slouken@libsdl.org> parents: 1312 diff changeset	58 SDL_free(mutex);
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	59 mutex = NULL;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	60 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	61 } else {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	62 SDL_OutOfMemory();
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	63 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	64 return(mutex);
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	65 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	66
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	67 void SDL_DestroyMutex(SDL_mutex *mutex)
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	68 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	69 if ( mutex ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	70 pthread_mutex_destroy(&mutex->id);
1336 3692456e7b0f Use SDL_ prefixed versions of C library functions. Sam Lantinga <slouken@libsdl.org> parents: 1312 diff changeset	71 SDL_free(mutex);
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	72 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	73 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	74
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	75 /* Lock the mutex */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	76 int SDL_mutexP(SDL_mutex *mutex)
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	77 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	78 int retval;
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	79 #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	80 pthread_t this_thread;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	81 #endif
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	82
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	83 if ( mutex == NULL ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	84 SDL_SetError("Passed a NULL mutex");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	85 return -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	86 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	87
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	88 retval = 0;
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	89 #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	90 this_thread = pthread_self();
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	91 if ( mutex->owner == this_thread ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	92 ++mutex->recursive;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	93 } else {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	94 /* The order of operations is important.
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	95 We set the locking thread id after we obtain the lock
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	96 so unlocks from other threads will fail.
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	97 */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	98 if ( pthread_mutex_lock(&mutex->id) == 0 ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	99 mutex->owner = this_thread;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	100 mutex->recursive = 0;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	101 } else {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	102 SDL_SetError("pthread_mutex_lock() failed");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	103 retval = -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	104 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	105 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	106 #else
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	107 if ( pthread_mutex_lock(&mutex->id) < 0 ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	108 SDL_SetError("pthread_mutex_lock() failed");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	109 retval = -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	110 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	111 #endif
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	112 return retval;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	113 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	114
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	115 int SDL_mutexV(SDL_mutex *mutex)
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	116 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	117 int retval;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	118
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	119 if ( mutex == NULL ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	120 SDL_SetError("Passed a NULL mutex");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	121 return -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	122 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	123
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	124 retval = 0;
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	125 #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	126 /* We can only unlock the mutex if we own it */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	127 if ( pthread_self() == mutex->owner ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	128 if ( mutex->recursive ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	129 --mutex->recursive;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	130 } else {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	131 /* The order of operations is important.
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	132 First reset the owner so another thread doesn't lock
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	133 the mutex and set the ownership before we reset it,
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	134 then release the lock semaphore.
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	135 */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	136 mutex->owner = 0;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	137 pthread_mutex_unlock(&mutex->id);
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	138 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	139 } else {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	140 SDL_SetError("mutex not owned by this thread");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	141 retval = -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	142 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	143
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	144 #else
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	145 if ( pthread_mutex_unlock(&mutex->id) < 0 ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	146 SDL_SetError("pthread_mutex_unlock() failed");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	147 retval = -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	148 }
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	149 #endif /* SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX */
955 d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	150
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	151 return retval;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	152 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100 Sam Lantinga <slouken@libsdl.org> parents: diff changeset	153 #endif

Mercurial > sdl-ios-xcode

annotate src/thread/riscos/SDL_sysmutex.c @ 4347:38f22ed3a433 SDL-1.2