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Diffstat (limited to '3rdparty/SDL2/src/thread/generic/SDL_syssem.c')
-rw-r--r--3rdparty/SDL2/src/thread/generic/SDL_syssem.c217
1 files changed, 0 insertions, 217 deletions
diff --git a/3rdparty/SDL2/src/thread/generic/SDL_syssem.c b/3rdparty/SDL2/src/thread/generic/SDL_syssem.c
deleted file mode 100644
index 92afcb0c07f..00000000000
--- a/3rdparty/SDL2/src/thread/generic/SDL_syssem.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- Simple DirectMedia Layer
- Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-*/
-#include "../../SDL_internal.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 built with thread support");
- return (SDL_sem *) 0;
-}
-
-void
-SDL_DestroySemaphore(SDL_sem * sem)
-{
-}
-
-int
-SDL_SemTryWait(SDL_sem * sem)
-{
- return SDL_SetError("SDL not built with thread support");
-}
-
-int
-SDL_SemWaitTimeout(SDL_sem * sem, Uint32 timeout)
-{
- return SDL_SetError("SDL not built with thread support");
-}
-
-int
-SDL_SemWait(SDL_sem * sem)
-{
- return SDL_SetError("SDL not built with thread support");
-}
-
-Uint32
-SDL_SemValue(SDL_sem * sem)
-{
- return 0;
-}
-
-int
-SDL_SemPost(SDL_sem * sem)
-{
- return SDL_SetError("SDL not built with thread support");
-}
-
-#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_LockMutex(sem->count_lock);
- SDL_UnlockMutex(sem->count_lock);
- SDL_DestroyMutex(sem->count_lock);
- }
- SDL_free(sem);
- }
-}
-
-int
-SDL_SemTryWait(SDL_sem * sem)
-{
- int retval;
-
- if (!sem) {
- return SDL_SetError("Passed a NULL semaphore");
- }
-
- 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) {
- return SDL_SetError("Passed a NULL semaphore");
- }
-
- /* 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;
- if (retval == 0) {
- --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) {
- return SDL_SetError("Passed a NULL semaphore");
- }
-
- 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 */
-/* vi: set ts=4 sw=4 expandtab: */