created subdir for threading stuff, moved mutex there

1 files changed, 92 insertions, 0 deletions

diff --git a/src/threads/mutex.c b/src/threads/mutex.c
new file mode 100644
index 0000000..509eb51
--- /dev/null
+++ b/src/threads/mutex.c
@@ -0,0 +1,92 @@
+/*
+    Copyright (C) 2008 Andreas Baumann <abaumann@yahoo.com>
+
+    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 3 of the License, or
+    (at your option) any later version.
+
+    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.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "errors.h"
+#include "threads/mutex.h"
+
+#if defined HAVE_PTHREADS
+
+#include <errno.h>		/* for EXXX values */
+#include <assert.h>		/* for assertions */
+
+wolf_error_t wolf_mutex_init( wolf_mutex_t *mutex ) {
+	pthread_mutexattr_t attr;
+	int res;
+
+	/* intialize mutex attribute object */
+	res = pthread_mutexattr_init( &attr );
+	if( res == ENOMEM ) {
+		return WOLF_ERR_OUT_OF_MEMORY;
+	} else if( res == EINVAL ) {
+		return WOLF_ERR_INVALID_VALUE;
+	} else if( res != 0 ) {
+		return WOLF_ERR_INTERNAL;
+	}
+
+	/* set default values */
+	res = pthread_mutexattr_settype( &attr, WOLF_MUTEX_DEFAULT_ATTR );
+	if( res != 0 ) {
+		res = pthread_mutexattr_destroy( &attr );
+		assert( res == 0 );
+		return WOLF_ERR_INTERNAL;
+	}
+
+	/* initialize the mutex */
+	res = pthread_mutex_init( mutex, &attr );
+	if( res == ENOMEM ) {
+		return WOLF_ERR_OUT_OF_MEMORY;
+	} else if( res == EINVAL ) {
+		return WOLF_ERR_INVALID_VALUE;
+	} else if( res != 0 ) {
+		return WOLF_ERR_INTERNAL;
+	}
+
+	/* destroy mutex attributes */
+	res = pthread_mutexattr_destroy( &attr );
+	assert( res == 0 );
+
+	return WOLF_OK;
+}
+
+wolf_error_t wolf_mutex_destroy( wolf_mutex_t *mutex ) {
+	int res;
+
+	res = pthread_mutex_destroy( mutex );
+	if( res == EINVAL ) {
+		return WOLF_ERR_INVALID_VALUE;
+	} else if( res != 0 ) {
+		return WOLF_ERR_INTERNAL;
+	}
+
+	return WOLF_OK;
+}
+
+#endif /* defined HAVE_PTHREADS */
+
+#if defined _WIN32
+
+wolf_error_t wolf_mutex_init( wolf_mutex_t *mutex ) {
+	InitializeCriticalSection( mutex );
+	return WOLF_OK;
+}
+
+wolf_error_t wolf_mutex_destroy( wolf_mutex_t *mutex ) {
+	DeleteCriticalSection( mutex );
+	return WOLF_OK;
+}
+
+#endif /* defined _WIN32 */