started to add thread stuff, mutexes first

3 files changed, 86 insertions, 1 deletions

diff --git a/src/GNUmakefile b/src/GNUmakefile
index ea2e754..8fc202f 100644
--- a/src/GNUmakefile
+++ b/src/GNUmakefile
@@ -26,10 +26,14 @@ DAEMON_OBJS = \
 SERVICE_OBJS = \
 	service/service.o
 
+THREADING_OBJS = \
+	mutex.o
+
 OBJS = \
 	$(PORT_OBJS) \
 	$(LOG_OBJS) \
-	$(DAEMON_OBJS)
+	$(DAEMON_OBJS) \
+	$(THREADING_OBJS)
 
 CATALOG_NAME = libwolf
 
diff --git a/src/mutex.c b/src/mutex.c
new file mode 100644
index 0000000..2e06318
--- /dev/null
+++ b/src/mutex.c
@@ -0,0 +1,78 @@
+/*
+    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 "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 {
+		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 {
+		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 {
+		return WOLF_ERR_INTERNAL;
+	}
+
+	return WOLF_OK;
+}
+
+#endif /* defined HAVE_PTHREADS */
diff --git a/src/port/string.c b/src/port/string.c
index e05dfbd..da0dfce 100644
--- a/src/port/string.c
+++ b/src/port/string.c
@@ -47,6 +47,9 @@ char *wolf_port_strdup( const char *s ) {
 #include <sys/types.h>		/* for size_t */
 #include <errno.h>		/* for errno */
 
+/* FIXME: this version is NOT thread and signal safe! But we have to port
+ * mutexes first
+ */
 int wolf_port_strerror_r( int num, char *buf, size_t buflen ) {
 	int safe_errno = errno;
 	const char *msg;