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author | Steve Kondik <shade@chemlab.org> | 2012-11-18 15:47:18 -0800 |
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committer | Steve Kondik <shade@chemlab.org> | 2012-11-18 15:47:18 -0800 |
commit | a546c7006355a7bd1df4267ee53d0bfa2c017c8c (patch) | |
tree | 01be0bf6c0d6968e1468ec9661fd52110f9b05a7 /distrib/sdl-1.2.12/src/thread/beos/SDL_syssem.c | |
parent | baf3d7830396202df5cc47bd7bcee109c319cdb3 (diff) | |
parent | 0f809250987b64f491bd3b4b73c0f0d33036a786 (diff) | |
download | external_qemu-a546c7006355a7bd1df4267ee53d0bfa2c017c8c.zip external_qemu-a546c7006355a7bd1df4267ee53d0bfa2c017c8c.tar.gz external_qemu-a546c7006355a7bd1df4267ee53d0bfa2c017c8c.tar.bz2 |
Merge branch 'jb-mr1-release' of https://android.googlesource.com/platform/external/qemu into mr1-staging
Change-Id: I8a4a71ac65b08e6e17f26c942f67a15b85211115
Diffstat (limited to 'distrib/sdl-1.2.12/src/thread/beos/SDL_syssem.c')
-rw-r--r-- | distrib/sdl-1.2.12/src/thread/beos/SDL_syssem.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/distrib/sdl-1.2.12/src/thread/beos/SDL_syssem.c b/distrib/sdl-1.2.12/src/thread/beos/SDL_syssem.c deleted file mode 100644 index 5ea4f37..0000000 --- a/distrib/sdl-1.2.12/src/thread/beos/SDL_syssem.c +++ /dev/null @@ -1,142 +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" - -/* Semaphores in the BeOS environment */ - -#include <be/kernel/OS.h> - -#include "SDL_thread.h" - - -struct SDL_semaphore { - sem_id id; -}; - -/* Create a counting semaphore */ -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) -{ - SDL_sem *sem; - - sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); - if ( sem ) { - sem->id = create_sem(initial_value, "SDL semaphore"); - if ( sem->id < B_NO_ERROR ) { - SDL_SetError("create_sem() failed"); - SDL_free(sem); - sem = NULL; - } - } else { - SDL_OutOfMemory(); - } - return(sem); -} - -/* Free the semaphore */ -void SDL_DestroySemaphore(SDL_sem *sem) -{ - if ( sem ) { - if ( sem->id >= B_NO_ERROR ) { - delete_sem(sem->id); - } - SDL_free(sem); - } -} - -int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) -{ - int32 val; - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - tryagain: - if ( timeout == SDL_MUTEX_MAXWAIT ) { - val = acquire_sem(sem->id); - } else { - timeout *= 1000; /* BeOS uses a timeout in microseconds */ - val = acquire_sem_etc(sem->id, 1, B_RELATIVE_TIMEOUT, timeout); - } - switch (val) { - case B_INTERRUPTED: - goto tryagain; - case B_NO_ERROR: - retval = 0; - break; - case B_TIMED_OUT: - retval = SDL_MUTEX_TIMEDOUT; - break; - case B_WOULD_BLOCK: - retval = SDL_MUTEX_TIMEDOUT; - break; - default: - SDL_SetError("acquire_sem() failed"); - retval = -1; - break; - } - - return retval; -} - -int SDL_SemTryWait(SDL_sem *sem) -{ - return SDL_SemWaitTimeout(sem, 0); -} - -int SDL_SemWait(SDL_sem *sem) -{ - return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); -} - -/* Returns the current count of the semaphore */ -Uint32 SDL_SemValue(SDL_sem *sem) -{ - int32 count; - Uint32 value; - - value = 0; - if ( sem ) { - get_sem_count(sem->id, &count); - if ( count > 0 ) { - value = (Uint32)count; - } - } - return value; -} - -/* Atomically increases the semaphore's count (not blocking) */ -int SDL_SemPost(SDL_sem *sem) -{ - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - if ( release_sem(sem->id) != B_NO_ERROR ) { - SDL_SetError("release_sem() failed"); - return -1; - } - return 0; -} |