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/*
This file is part of GNUnet.
Copyright (C) 2001, 2002, 2003, 2004, 2012 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file src/fuse/mutex.c
* @brief implementation of mutual exclusion
*/
#include "gnunet-fuse.h"
#include "mutex.h"
#include <pthread.h>
#ifndef PTHREAD_MUTEX_NORMAL
#ifdef PTHREAD_MUTEX_TIMED_NP
#define PTHREAD_MUTEX_NORMAL PTHREAD_MUTEX_TIMED_NP
#else
#define PTHREAD_MUTEX_NORMAL NULL
#endif
#endif
/**
* This prototype is somehow missing in various Linux pthread
* include files. But we need it and it seems to be available
* on all pthread-systems so far. Odd.
*/
#ifndef _MSC_VER
extern int pthread_mutexattr_setkind_np (pthread_mutexattr_t * attr,
int kind);
#endif
/**
* @brief Structure for MUTual EXclusion (Mutex).
*/
struct GNUNET_Mutex
{
pthread_mutex_t pt;
};
struct GNUNET_Mutex *
GNUNET_mutex_create (int isRecursive)
{
pthread_mutexattr_t attr;
struct GNUNET_Mutex *mut;
#if WINDOWS
attr = NULL;
#endif
pthread_mutexattr_init (&attr);
if (isRecursive)
{
#ifdef __linux__
GNUNET_assert (0 == pthread_mutexattr_setkind_np
(&attr, PTHREAD_MUTEX_RECURSIVE_NP));
#elif BSD || SOLARIS || OSX || WINDOWS
GNUNET_assert (0 == pthread_mutexattr_settype
(&attr, PTHREAD_MUTEX_RECURSIVE));
#endif
}
else
{
#ifdef __linux__
GNUNET_assert (0 == pthread_mutexattr_setkind_np
(&attr, PTHREAD_MUTEX_ERRORCHECK_NP));
#else
GNUNET_assert (0 == pthread_mutexattr_settype
(&attr, PTHREAD_MUTEX_ERRORCHECK));
#endif
}
mut = GNUNET_new (struct GNUNET_Mutex);
GNUNET_assert (0 == pthread_mutex_init (&mut->pt, &attr));
return mut;
}
void
GNUNET_mutex_destroy (struct GNUNET_Mutex * mutex)
{
GNUNET_assert (0 == pthread_mutex_destroy (&mutex->pt));
GNUNET_free (mutex);
}
void
GNUNET_mutex_lock (struct GNUNET_Mutex * mutex)
{
if (0 != (errno = pthread_mutex_lock (&mutex->pt)))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "pthread_mutex_unlock");
GNUNET_assert (0);
}
}
void
GNUNET_mutex_unlock (struct GNUNET_Mutex * mutex)
{
if (0 != (errno = pthread_mutex_unlock (&mutex->pt)))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "pthread_mutex_unlock");
GNUNET_assert (0);
}
}
/* end of mutex.c */
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