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Diffstat (limited to 'libpthread/sysdeps/generic/sem-post.c')
-rw-r--r-- | libpthread/sysdeps/generic/sem-post.c | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/libpthread/sysdeps/generic/sem-post.c b/libpthread/sysdeps/generic/sem-post.c deleted file mode 100644 index 6d438bf2..00000000 --- a/libpthread/sysdeps/generic/sem-post.c +++ /dev/null @@ -1,62 +0,0 @@ -/* Post a semaphore. Generic version. - Copyright (C) 2005, 2006 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C 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. - - The GNU C 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 the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <semaphore.h> -#include <assert.h> - -#include <pt-internal.h> - -int -__sem_post (sem_t *sem) -{ - struct __pthread *wakeup; - - __pthread_spin_lock (&sem->__lock); - if (sem->__value > 0) - /* Do a quick up. */ - { - assert (! sem->__queue); - sem->__value ++; - __pthread_spin_unlock (&sem->__lock); - return 0; - } - - if (! sem->__queue) - /* No one waiting. */ - { - sem->__value = 1; - __pthread_spin_unlock (&sem->__lock); - return 0; - } - - /* Wake someone up. */ - - /* First dequeue someone. */ - wakeup = sem->__queue; - __pthread_dequeue (wakeup); - - /* Then drop the lock and transfer control. */ - __pthread_spin_unlock (&sem->__lock); - - __pthread_wakeup (wakeup); - - return 0; -} - -strong_alias (__sem_post, sem_post); |