1 files changed, 134 insertions, 0 deletions
diff --git a/src/libmowgli/thread/mutex.c b/src/libmowgli/thread/mutex.c
new file mode 100644
index 0000000..1d5d480
--- /dev/null
+++ b/src/libmowgli/thread/mutex.c
@@ -0,0 +1,134 @@
+/*
+ * libmowgli: A collection of useful routines for programming.
+ * mutex.c: Cross-platform mutexes.
+ *
+ * Copyright (c) 2011 William Pitcock <nenolod@dereferenced.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "mowgli.h"
+
+#if defined(_WIN32)
+extern const mowgli_mutex_ops_t _mowgli_win32_mutex_ops;
+#elif defined(_sun) || defined(_sco)
+extern const mowgli_mutex_ops_t _mowgli_sun_mutex_ops;
+#else
+extern const mowgli_mutex_ops_t _mowgli_posix_mutex_ops;
+#endif
+
+extern const mowgli_mutex_ops_t _mowgli_null_mutex_ops;
+
+static const mowgli_mutex_ops_t *_mowgli_mutex_ops = NULL;
+
+static inline const mowgli_mutex_ops_t *get_mutex_platform(void)
+{
+	/* allow for threading policy to set custom mutex ops */
+	if (_mowgli_mutex_ops != NULL)
+		return _mowgli_mutex_ops;
+
+#if defined(_WIN32)
+	return &_mowgli_win32_mutex_ops;
+#endif
+
+#if defined(_sun) || defined(_sco)
+	return &_mowgli_sun_mutex_ops;
+#endif
+
+#if !defined(MOWGLI_FEATURE_HAVE_NATIVE_MUTEXES)
+	return &_mowgli_posix_mutex_ops;
+#endif
+
+	return &_mowgli_null_mutex_ops;
+}
+
+mowgli_mutex_t *mowgli_mutex_create(void)
+{
+	mowgli_mutex_t *mutex = mowgli_alloc(sizeof(mowgli_mutex_t));
+
+	return_val_if_fail(mutex != NULL, NULL);
+
+	if (mowgli_mutex_init(mutex))
+		return mutex;
+	else
+	{
+		mowgli_free(mutex);
+		return NULL;
+	}
+}
+
+int mowgli_mutex_init(mowgli_mutex_t *mutex)
+{
+	return_val_if_fail(mutex != NULL, -1);
+
+	mutex->ops = get_mutex_platform();
+
+	return mutex->ops->mutex_create(mutex);
+}
+
+int mowgli_mutex_lock(mowgli_mutex_t *mutex)
+{
+	return_val_if_fail(mutex != NULL, -1);
+	return_val_if_fail(mutex->ops != NULL, -1);
+
+	return mutex->ops->mutex_lock(mutex);
+}
+
+int mowgli_mutex_trylock(mowgli_mutex_t *mutex)
+{
+	return_val_if_fail(mutex != NULL, -1);
+	return_val_if_fail(mutex->ops != NULL, -1);
+
+	return mutex->ops->mutex_trylock(mutex);
+}
+
+int mowgli_mutex_unlock(mowgli_mutex_t *mutex)
+{
+	return_val_if_fail(mutex != NULL, -1);
+	return_val_if_fail(mutex->ops != NULL, -1);
+
+	return mutex->ops->mutex_unlock(mutex);
+}
+
+int mowgli_mutex_uninit(mowgli_mutex_t *mutex)
+{
+	return_val_if_fail(mutex != NULL, -1);
+	return_val_if_fail(mutex->ops != NULL, -1);
+
+	return mutex->ops->mutex_destroy(mutex);
+}
+
+void mowgli_mutex_destroy(mowgli_mutex_t *mutex)
+{
+	return_if_fail(mutex != NULL);
+
+	mowgli_mutex_uninit(mutex);
+	mowgli_free(mutex);
+}
+
+void mowgli_mutex_set_policy(mowgli_thread_policy_t policy)
+{
+	switch (policy)
+	{
+	case MOWGLI_THREAD_POLICY_DISABLED:
+		_mowgli_mutex_ops = &_mowgli_null_mutex_ops;
+		break;
+	case MOWGLI_THREAD_POLICY_DEFAULT:
+	default:
+		_mowgli_mutex_ops = NULL;
+	}
+}