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/* Copyright (C) 2002, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. The GNU C 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. 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <semaphore.h> #include <lowlevellock.h> #include "semaphoreP.h" #include <bits/kernel-features.h> int sem_init ( sem_t *sem, int pshared, unsigned int value) { /* Parameter sanity check. */ if (__builtin_expect (value > SEM_VALUE_MAX, 0)) { __set_errno (EINVAL); return -1; } /* Map to the internal type. */ struct new_sem *isem = (struct new_sem *) sem; /* Use the values the user provided. */ isem->value = value; #ifdef __ASSUME_PRIVATE_FUTEX isem->private = pshared ? 0 : FUTEX_PRIVATE_FLAG; #else isem->private = pshared ? 0 : THREAD_GETMEM (THREAD_SELF, header.private_futex); #endif isem->nwaiters = 0; return 0; } |