merged the modularization branch (credentials) back to trunk

src/libstrongswan/utils/mutex.c

@@ -0,0 +1,267 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ *
+ * $Id$
+ */
+
+#include "mutex.h"
+
+#include <library.h>
+#include <debug.h>
+
+#include <pthread.h>
+#include <sys/time.h>
+#include <time.h>
+#include <errno.h>
+
+
+typedef struct private_mutex_t private_mutex_t;
+typedef struct private_n_mutex_t private_n_mutex_t;
+typedef struct private_r_mutex_t private_r_mutex_t;
+typedef struct private_condvar_t private_condvar_t;
+
+/**
+ * private data of mutex
+ */
+struct private_mutex_t {
+
+	/**
+	 * public functions
+	 */
+	mutex_t public;
+	
+	/**
+	 * wrapped pthread mutex
+	 */
+	pthread_mutex_t mutex;
+};
+
+/**
+ * private data of mutex, extended by recursive locking information
+ */
+struct private_r_mutex_t {
+
+	/**
+	 * public functions
+	 */
+	private_mutex_t generic;
+	
+	/**
+	 * thread which currently owns mutex
+	 */
+	pthread_t thread;
+	
+	/**
+	 * times we have locked the lock
+	 */
+	int times;
+};
+
+/**
+ * private data of condvar
+ */
+struct private_condvar_t {
+
+	/**
+	 * public functions
+	 */
+	condvar_t public;
+	
+	/**
+	 * wrapped pthread condvar
+	 */
+	pthread_cond_t condvar;
+};
+
+/**
+ * Implementation of mutex_t.lock.
+ */
+static void lock(private_mutex_t *this)
+{
+	if (pthread_mutex_lock(&this->mutex))
+	{
+		DBG1("!!!! MUTEX %sLOCK ERROR, your code is buggy !!!", "");
+	}
+}
+
+/**
+ * Implementation of mutex_t.unlock.
+ */
+static void unlock(private_mutex_t *this)
+{
+	if (pthread_mutex_unlock(&this->mutex))
+	{
+		DBG1("!!!! MUTEX %sLOCK ERROR, your code is buggy !!!", "UN");
+	}
+}
+
+/**
+ * Implementation of mutex_t.lock.
+ */
+static void lock_r(private_r_mutex_t *this)
+{
+	pthread_t self = pthread_self();
+
+	if (this->thread == self)
+	{
+		this->times++;
+		return;
+	}
+	lock(&this->generic);
+	this->thread = self;
+	this->times = 1;
+}
+
+/**
+ * Implementation of mutex_t.unlock.
+ */
+static void unlock_r(private_r_mutex_t *this)
+{
+	if (--this->times == 0)
+	{
+		this->thread = 0;
+		unlock(&this->generic);
+	}
+}
+
+/**
+ * Implementation of mutex_t.destroy
+ */
+static void mutex_destroy(private_mutex_t *this)
+{
+	pthread_mutex_destroy(&this->mutex);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+mutex_t *mutex_create(mutex_type_t type)
+{
+	switch (type)
+	{
+		case MUTEX_RECURSIVE:
+		{
+			private_r_mutex_t *this = malloc_thing(private_r_mutex_t);
+	
+			this->generic.public.lock = (void(*)(mutex_t*))lock_r;
+			this->generic.public.unlock = (void(*)(mutex_t*))unlock_r;
+			this->generic.public.destroy = (void(*)(mutex_t*))mutex_destroy;	
+	
+			pthread_mutex_init(&this->generic.mutex, NULL);
+			this->thread = 0;
+			this->times = 0;
+	
+			return &this->generic.public;
+		}
+		case MUTEX_DEFAULT:
+		default:
+		{
+			private_mutex_t *this = malloc_thing(private_mutex_t);
+		
+			this->public.lock = (void(*)(mutex_t*))lock;
+			this->public.unlock = (void(*)(mutex_t*))unlock;
+			this->public.destroy = (void(*)(mutex_t*))mutex_destroy;
+		
+			pthread_mutex_init(&this->mutex, NULL);
+		
+			return &this->public;
+		}
+	}
+}
+
+/**
+ * Implementation of condvar_t.wait.
+ */
+static void wait(private_condvar_t *this, private_mutex_t *mutex)
+{
+	pthread_cond_wait(&this->condvar, &mutex->mutex);
+}
+
+/**
+ * Implementation of condvar_t.timed_wait.
+ */
+static bool timed_wait(private_condvar_t *this, private_mutex_t *mutex,
+					   u_int timeout)
+{
+	struct timespec ts;
+	struct timeval tv;
+	u_int s, ms;
+	
+	gettimeofday(&tv, NULL);
+	
+	s = timeout / 1000;
+	ms = timeout % 1000;
+	
+	ts.tv_sec = tv.tv_sec + s;
+	ts.tv_nsec = tv.tv_usec * 1000 + ms * 1000000;
+	if (ts.tv_nsec > 1000000000 /* 1s */)
+	{
+		ts.tv_nsec -= 1000000000;
+		ts.tv_sec++;
+	}
+	return (pthread_cond_timedwait(&this->condvar, &mutex->mutex,
+								   &ts) == ETIMEDOUT);
+}
+
+/**
+ * Implementation of condvar_t.signal.
+ */
+static void signal(private_condvar_t *this)
+{
+	pthread_cond_signal(&this->condvar);
+}
+
+/**
+ * Implementation of condvar_t.broadcast.
+ */
+static void broadcast(private_condvar_t *this)
+{
+	pthread_cond_broadcast(&this->condvar);
+}
+
+/**
+ * Implementation of condvar_t.destroy
+ */
+static void condvar_destroy(private_condvar_t *this)
+{
+	pthread_cond_destroy(&this->condvar);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+condvar_t *condvar_create(condvar_type_t type)
+{
+	switch (type)
+	{
+		case CONDVAR_DEFAULT:
+		default:
+		{
+			private_condvar_t *this = malloc_thing(private_condvar_t);
+		
+			this->public.wait = (void(*)(condvar_t*, mutex_t *mutex))wait;
+			this->public.timed_wait = (bool(*)(condvar_t*, mutex_t *mutex, u_int timeout))timed_wait;
+			this->public.signal = (void(*)(condvar_t*))signal;
+			this->public.broadcast = (void(*)(condvar_t*))broadcast;
+			this->public.destroy = (void(*)(condvar_t*))condvar_destroy;
+		
+			pthread_cond_init(&this->condvar, NULL);
+		
+			return &this->public;
+		}
+	}
+}
+