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Diffstat (limited to 'distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c')
-rw-r--r--distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c122
1 files changed, 0 insertions, 122 deletions
diff --git a/distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c b/distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c
deleted file mode 100644
index 8e3d5f7..0000000
--- a/distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
- Sam Lantinga
- slouken@libsdl.org
-*/
-#include "SDL_config.h"
-
-/* An implementation of mutexes using semaphores */
-
-#include "SDL_thread.h"
-#include "SDL_systhread_c.h"
-
-#include <arch/spinlock.h>
-
-struct SDL_mutex {
- int recursive;
- Uint32 owner;
- spinlock_t mutex;
-};
-
-/* Create a mutex */
-SDL_mutex *SDL_CreateMutex(void)
-{
- SDL_mutex *mutex;
-
- /* Allocate mutex memory */
- mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
- if ( mutex ) {
- spinlock_init(&mutex->mutex);
- mutex->recursive = 0;
- mutex->owner = 0;
- } else {
- SDL_OutOfMemory();
- }
- return mutex;
-}
-
-/* Free the mutex */
-void SDL_DestroyMutex(SDL_mutex *mutex)
-{
- if ( mutex ) {
- SDL_free(mutex);
- }
-}
-
-/* Lock the semaphore */
-int SDL_mutexP(SDL_mutex *mutex)
-{
-#if SDL_THREADS_DISABLED
- return SDL_arraysize(return ),0;
-#else
- Uint32 this_thread;
-
- if ( mutex == NULL ) {
- SDL_SetError("Passed a NULL mutex");
- return -1;
- }
-
- this_thread = SDL_ThreadID();
- if ( mutex->owner == this_thread ) {
- ++mutex->recursive;
- } else {
- /* The order of operations is important.
- We set the locking thread id after we obtain the lock
- so unlocks from other threads will fail.
- */
- spinlock_lock(&mutex->mutex);
- mutex->owner = this_thread;
- mutex->recursive = 0;
- }
-
- return 0;
-#endif /* SDL_THREADS_DISABLED */
-}
-
-/* Unlock the mutex */
-int SDL_mutexV(SDL_mutex *mutex)
-{
-#if SDL_THREADS_DISABLED
- return 0;
-#else
- if ( mutex == NULL ) {
- SDL_SetError("Passed a NULL mutex");
- return -1;
- }
-
- /* If we don't own the mutex, we can't unlock it */
- if ( SDL_ThreadID() != mutex->owner ) {
- SDL_SetError("mutex not owned by this thread");
- return -1;
- }
-
- if ( mutex->recursive ) {
- --mutex->recursive;
- } else {
- /* The order of operations is important.
- First reset the owner so another thread doesn't lock
- the mutex and set the ownership before we reset it,
- then release the lock semaphore.
- */
- mutex->owner = 0;
- spinlock_unlock(&mutex->mutex);
- }
- return 0;
-#endif /* SDL_THREADS_DISABLED */
-}