diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/thread/generic')
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/generic/SDL_syscond.c | 215 | ||||
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex.c | 129 | ||||
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex_c.h | 23 | ||||
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/generic/SDL_syssem.c | 209 | ||||
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/generic/SDL_systhread.c | 54 | ||||
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/generic/SDL_systhread_c.h | 25 |
6 files changed, 0 insertions, 655 deletions
diff --git a/distrib/sdl-1.2.12/src/thread/generic/SDL_syscond.c b/distrib/sdl-1.2.12/src/thread/generic/SDL_syscond.c deleted file mode 100644 index 6a9d2dc..0000000 --- a/distrib/sdl-1.2.12/src/thread/generic/SDL_syscond.c +++ /dev/null @@ -1,215 +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 condition variables using semaphores and mutexes */ -/* - This implementation borrows heavily from the BeOS condition variable - implementation, written by Christopher Tate and Owen Smith. Thanks! - */ - -#include "SDL_thread.h" - -struct SDL_cond -{ - SDL_mutex *lock; - int waiting; - int signals; - SDL_sem *wait_sem; - SDL_sem *wait_done; -}; - -/* Create a condition variable */ -SDL_cond * SDL_CreateCond(void) -{ - SDL_cond *cond; - - cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond)); - if ( cond ) { - cond->lock = SDL_CreateMutex(); - cond->wait_sem = SDL_CreateSemaphore(0); - cond->wait_done = SDL_CreateSemaphore(0); - cond->waiting = cond->signals = 0; - if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) { - SDL_DestroyCond(cond); - cond = NULL; - } - } else { - SDL_OutOfMemory(); - } - return(cond); -} - -/* Destroy a condition variable */ -void SDL_DestroyCond(SDL_cond *cond) -{ - if ( cond ) { - if ( cond->wait_sem ) { - SDL_DestroySemaphore(cond->wait_sem); - } - if ( cond->wait_done ) { - SDL_DestroySemaphore(cond->wait_done); - } - if ( cond->lock ) { - SDL_DestroyMutex(cond->lock); - } - SDL_free(cond); - } -} - -/* Restart one of the threads that are waiting on the condition variable */ -int SDL_CondSignal(SDL_cond *cond) -{ - if ( ! cond ) { - SDL_SetError("Passed a NULL condition variable"); - return -1; - } - - /* If there are waiting threads not already signalled, then - signal the condition and wait for the thread to respond. - */ - SDL_LockMutex(cond->lock); - if ( cond->waiting > cond->signals ) { - ++cond->signals; - SDL_SemPost(cond->wait_sem); - SDL_UnlockMutex(cond->lock); - SDL_SemWait(cond->wait_done); - } else { - SDL_UnlockMutex(cond->lock); - } - - return 0; -} - -/* Restart all threads that are waiting on the condition variable */ -int SDL_CondBroadcast(SDL_cond *cond) -{ - if ( ! cond ) { - SDL_SetError("Passed a NULL condition variable"); - return -1; - } - - /* If there are waiting threads not already signalled, then - signal the condition and wait for the thread to respond. - */ - SDL_LockMutex(cond->lock); - if ( cond->waiting > cond->signals ) { - int i, num_waiting; - - num_waiting = (cond->waiting - cond->signals); - cond->signals = cond->waiting; - for ( i=0; i<num_waiting; ++i ) { - SDL_SemPost(cond->wait_sem); - } - /* Now all released threads are blocked here, waiting for us. - Collect them all (and win fabulous prizes!) :-) - */ - SDL_UnlockMutex(cond->lock); - for ( i=0; i<num_waiting; ++i ) { - SDL_SemWait(cond->wait_done); - } - } else { - SDL_UnlockMutex(cond->lock); - } - - return 0; -} - -/* Wait on the condition variable for at most 'ms' milliseconds. - The mutex must be locked before entering this function! - The mutex is unlocked during the wait, and locked again after the wait. - -Typical use: - -Thread A: - SDL_LockMutex(lock); - while ( ! condition ) { - SDL_CondWait(cond); - } - SDL_UnlockMutex(lock); - -Thread B: - SDL_LockMutex(lock); - ... - condition = true; - ... - SDL_UnlockMutex(lock); - */ -int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms) -{ - int retval; - - if ( ! cond ) { - SDL_SetError("Passed a NULL condition variable"); - return -1; - } - - /* Obtain the protection mutex, and increment the number of waiters. - This allows the signal mechanism to only perform a signal if there - are waiting threads. - */ - SDL_LockMutex(cond->lock); - ++cond->waiting; - SDL_UnlockMutex(cond->lock); - - /* Unlock the mutex, as is required by condition variable semantics */ - SDL_UnlockMutex(mutex); - - /* Wait for a signal */ - if ( ms == SDL_MUTEX_MAXWAIT ) { - retval = SDL_SemWait(cond->wait_sem); - } else { - retval = SDL_SemWaitTimeout(cond->wait_sem, ms); - } - - /* Let the signaler know we have completed the wait, otherwise - the signaler can race ahead and get the condition semaphore - if we are stopped between the mutex unlock and semaphore wait, - giving a deadlock. See the following URL for details: - http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html - */ - SDL_LockMutex(cond->lock); - if ( cond->signals > 0 ) { - /* If we timed out, we need to eat a condition signal */ - if ( retval > 0 ) { - SDL_SemWait(cond->wait_sem); - } - /* We always notify the signal thread that we are done */ - SDL_SemPost(cond->wait_done); - - /* Signal handshake complete */ - --cond->signals; - } - --cond->waiting; - SDL_UnlockMutex(cond->lock); - - /* Lock the mutex, as is required by condition variable semantics */ - SDL_LockMutex(mutex); - - return retval; -} - -/* Wait on the condition variable forever */ -int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex) -{ - return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT); -} diff --git a/distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex.c b/distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex.c deleted file mode 100644 index 18099d2..0000000 --- a/distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex.c +++ /dev/null @@ -1,129 +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" - - -struct SDL_mutex { - int recursive; - Uint32 owner; - SDL_sem *sem; -}; - -/* Create a mutex */ -SDL_mutex *SDL_CreateMutex(void) -{ - SDL_mutex *mutex; - - /* Allocate mutex memory */ - mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex)); - if ( mutex ) { - /* Create the mutex semaphore, with initial value 1 */ - mutex->sem = SDL_CreateSemaphore(1); - mutex->recursive = 0; - mutex->owner = 0; - if ( ! mutex->sem ) { - SDL_free(mutex); - mutex = NULL; - } - } else { - SDL_OutOfMemory(); - } - return mutex; -} - -/* Free the mutex */ -void SDL_DestroyMutex(SDL_mutex *mutex) -{ - if ( mutex ) { - if ( mutex->sem ) { - SDL_DestroySemaphore(mutex->sem); - } - SDL_free(mutex); - } -} - -/* Lock the semaphore */ -int SDL_mutexP(SDL_mutex *mutex) -{ -#if SDL_THREADS_DISABLED - 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. - */ - SDL_SemWait(mutex->sem); - 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; - SDL_SemPost(mutex->sem); - } - return 0; -#endif /* SDL_THREADS_DISABLED */ -} diff --git a/distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex_c.h b/distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex_c.h deleted file mode 100644 index 27d5509..0000000 --- a/distrib/sdl-1.2.12/src/thread/generic/SDL_sysmutex_c.h +++ /dev/null @@ -1,23 +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" - diff --git a/distrib/sdl-1.2.12/src/thread/generic/SDL_syssem.c b/distrib/sdl-1.2.12/src/thread/generic/SDL_syssem.c deleted file mode 100644 index c3ffd3f..0000000 --- a/distrib/sdl-1.2.12/src/thread/generic/SDL_syssem.c +++ /dev/null @@ -1,209 +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 semaphores using mutexes and condition variables */ - -#include "SDL_timer.h" -#include "SDL_thread.h" -#include "SDL_systhread_c.h" - - -#if SDL_THREADS_DISABLED - -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) -{ - SDL_SetError("SDL not configured with thread support"); - return (SDL_sem *)0; -} - -void SDL_DestroySemaphore(SDL_sem *sem) -{ - return; -} - -int SDL_SemTryWait(SDL_sem *sem) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -int SDL_SemWait(SDL_sem *sem) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -Uint32 SDL_SemValue(SDL_sem *sem) -{ - return 0; -} - -int SDL_SemPost(SDL_sem *sem) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -#else - -struct SDL_semaphore -{ - Uint32 count; - Uint32 waiters_count; - SDL_mutex *count_lock; - SDL_cond *count_nonzero; -}; - -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) -{ - SDL_sem *sem; - - sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); - if ( ! sem ) { - SDL_OutOfMemory(); - return NULL; - } - sem->count = initial_value; - sem->waiters_count = 0; - - sem->count_lock = SDL_CreateMutex(); - sem->count_nonzero = SDL_CreateCond(); - if ( ! sem->count_lock || ! sem->count_nonzero ) { - SDL_DestroySemaphore(sem); - return NULL; - } - - return sem; -} - -/* WARNING: - You cannot call this function when another thread is using the semaphore. -*/ -void SDL_DestroySemaphore(SDL_sem *sem) -{ - if ( sem ) { - sem->count = 0xFFFFFFFF; - while ( sem->waiters_count > 0) { - SDL_CondSignal(sem->count_nonzero); - SDL_Delay(10); - } - SDL_DestroyCond(sem->count_nonzero); - if ( sem->count_lock ) { - SDL_mutexP(sem->count_lock); - SDL_mutexV(sem->count_lock); - SDL_DestroyMutex(sem->count_lock); - } - SDL_free(sem); - } -} - -int SDL_SemTryWait(SDL_sem *sem) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - retval = SDL_MUTEX_TIMEDOUT; - SDL_LockMutex(sem->count_lock); - if ( sem->count > 0 ) { - --sem->count; - retval = 0; - } - SDL_UnlockMutex(sem->count_lock); - - return retval; -} - -int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - /* A timeout of 0 is an easy case */ - if ( timeout == 0 ) { - return SDL_SemTryWait(sem); - } - - SDL_LockMutex(sem->count_lock); - ++sem->waiters_count; - retval = 0; - while ( (sem->count == 0) && (retval != SDL_MUTEX_TIMEDOUT) ) { - retval = SDL_CondWaitTimeout(sem->count_nonzero, - sem->count_lock, timeout); - } - --sem->waiters_count; - --sem->count; - SDL_UnlockMutex(sem->count_lock); - - return retval; -} - -int SDL_SemWait(SDL_sem *sem) -{ - return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); -} - -Uint32 SDL_SemValue(SDL_sem *sem) -{ - Uint32 value; - - value = 0; - if ( sem ) { - SDL_LockMutex(sem->count_lock); - value = sem->count; - SDL_UnlockMutex(sem->count_lock); - } - return value; -} - -int SDL_SemPost(SDL_sem *sem) -{ - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - SDL_LockMutex(sem->count_lock); - if ( sem->waiters_count > 0 ) { - SDL_CondSignal(sem->count_nonzero); - } - ++sem->count; - SDL_UnlockMutex(sem->count_lock); - - return 0; -} - -#endif /* SDL_THREADS_DISABLED */ diff --git a/distrib/sdl-1.2.12/src/thread/generic/SDL_systhread.c b/distrib/sdl-1.2.12/src/thread/generic/SDL_systhread.c deleted file mode 100644 index 6739ad4..0000000 --- a/distrib/sdl-1.2.12/src/thread/generic/SDL_systhread.c +++ /dev/null @@ -1,54 +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" - -/* Thread management routines for SDL */ - -#include "SDL_thread.h" -#include "../SDL_systhread.h" - -int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) -{ - SDL_SetError("Threads are not supported on this platform"); - return(-1); -} - -void SDL_SYS_SetupThread(void) -{ - return; -} - -Uint32 SDL_ThreadID(void) -{ - return(0); -} - -void SDL_SYS_WaitThread(SDL_Thread *thread) -{ - return; -} - -void SDL_SYS_KillThread(SDL_Thread *thread) -{ - return; -} - diff --git a/distrib/sdl-1.2.12/src/thread/generic/SDL_systhread_c.h b/distrib/sdl-1.2.12/src/thread/generic/SDL_systhread_c.h deleted file mode 100644 index 7e876b0..0000000 --- a/distrib/sdl-1.2.12/src/thread/generic/SDL_systhread_c.h +++ /dev/null @@ -1,25 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2004 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public - License as published by the Free Software Foundation; either - version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with this library; if not, write to the Free - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - Sam Lantinga - slouken@libsdl.org -*/ -#include "SDL_config.h" - -/* Stub until we implement threads on this platform */ -typedef int SYS_ThreadHandle; |