thread/GLibMutex: new Mutex implementation

Switch WIN32 to this implementation to be able to use condition
variables, which is impossible with CriticalSection.

1 files changed, 88 insertions, 0 deletions

diff --git a/src/thread/GLibMutex.hxx b/src/thread/GLibMutex.hxx
new file mode 100644
index 000000000..f9bb5b4e9
--- /dev/null
+++ b/src/thread/GLibMutex.hxx
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2013 Max Kellermann <max@duempel.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``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
+ * FOUNDATION OR CONTRIBUTORS 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.
+ */
+
+#ifndef MPD_THREAD_GLIB_MUTEX_HXX
+#define MPD_THREAD_GLIB_MUTEX_HXX
+
+#include <glib.h>
+
+/**
+ * A wrapper for GMutex.
+ */
+class GLibMutex {
+#if GLIB_CHECK_VERSION(2,32,0)
+	GMutex mutex;
+#else
+	GMutex *mutex;
+#endif
+
+public:
+	GLibMutex() {
+#if GLIB_CHECK_VERSION(2,32,0)
+		g_mutex_init(&mutex);
+#else
+		mutex = g_mutex_new();
+#endif
+	}
+
+	~GLibMutex() {
+#if GLIB_CHECK_VERSION(2,32,0)
+		g_mutex_clear(&mutex);
+#else
+		g_mutex_free(mutex);
+#endif
+	}
+
+	GLibMutex(const GLibMutex &other) = delete;
+	GLibMutex &operator=(const GLibMutex &other) = delete;
+
+private:
+	GMutex *GetNative() {
+#if GLIB_CHECK_VERSION(2,32,0)
+		return &mutex;
+#else
+		return mutex;
+#endif
+	}
+
+public:
+	void lock() {
+		g_mutex_lock(GetNative());
+	}
+
+	bool try_lock() {
+		return g_mutex_trylock(GetNative());
+	}
+
+	void unlock() {
+		g_mutex_lock(GetNative());
+	}
+};
+
+#endif