From d8239786b306ffda6d5d73753d01f0ad3358e1a0 Mon Sep 17 00:00:00 2001 From: Jesse Hall Date: Tue, 17 Jul 2012 16:58:55 -0700 Subject: Delete sdl-1.2.12 Change-Id: Ia96f80df04035ae84be3af468c945f2cec14f99c --- distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c | 122 ------------------------ 1 file changed, 122 deletions(-) delete mode 100644 distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c (limited to 'distrib/sdl-1.2.12/src/thread/dc/SDL_sysmutex.c') 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 - -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 */ -} -- cgit v1.1