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-rw-r--r--libpthread/nptl/pthread_mutex_init.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_mutex_init.c b/libpthread/nptl/pthread_mutex_init.c
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+++ b/libpthread/nptl/pthread_mutex_init.c
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+/* Copyright (C) 2002, 2003, 2004 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <assert.h>
+#include <string.h>
+#include "pthreadP.h"
+
+
+static const struct pthread_mutexattr default_attr =
+ {
+ /* Default is a normal mutex, not shared between processes. */
+ .mutexkind = PTHREAD_MUTEX_NORMAL
+ };
+
+
+int
+__pthread_mutex_init (mutex, mutexattr)
+ pthread_mutex_t *mutex;
+ const pthread_mutexattr_t *mutexattr;
+{
+ const struct pthread_mutexattr *imutexattr;
+
+ assert (sizeof (pthread_mutex_t) <= __SIZEOF_PTHREAD_MUTEX_T);
+
+ imutexattr = (const struct pthread_mutexattr *) mutexattr ?: &default_attr;
+
+ /* Clear the whole variable. */
+ memset (mutex, '\0', __SIZEOF_PTHREAD_MUTEX_T);
+
+ /* Copy the values from the attribute. */
+ mutex->__data.__kind = imutexattr->mutexkind & ~0x80000000;
+
+ /* Default values: mutex not used yet. */
+ // mutex->__count = 0; already done by memset
+ // mutex->__owner = 0; already done by memset
+ // mutex->__nusers = 0; already done by memset
+ // mutex->__spins = 0; already done by memset
+
+ return 0;
+}
+strong_alias (__pthread_mutex_init, pthread_mutex_init)