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authorMax Kellermann <max@duempel.org>2013-01-11 10:50:59 +0100
committerMax Kellermann <max@duempel.org>2013-01-11 11:11:07 +0100
commit0226440a2d915e34139413803b3c9fbb261dd9c1 (patch)
tree98efb491b9b3dfc26b37593af35f49edb98d588a /src/thread/CriticalSection.hxx
parent9d770d6084cb90b99ab129ff0b9e1ef57aab9a83 (diff)
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thread/{Mutex,Cond}: new backend for WIN32
Use CRITICAL_SECTION and CONDITION_VARIABLE. This requires Windows Vista or newer. It fixes problems with GLib threading objects that were implicitly created by static constructors before g_thread_init().
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+/*
+ * Copyright (C) 2009-2013 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_CRITICAL_SECTION_HXX
+#define MPD_THREAD_CRITICAL_SECTION_HXX
+
+#include <windows.h>
+
+/**
+ * Wrapper for a CRITICAL_SECTION, backend for the Mutex class.
+ */
+class CriticalSection {
+ friend class WindowsCond;
+
+ CRITICAL_SECTION critical_section;
+
+public:
+ CriticalSection() {
+ ::InitializeCriticalSection(&critical_section);
+ }
+
+ ~CriticalSection() {
+ ::DeleteCriticalSection(&critical_section);
+ }
+
+ CriticalSection(const CriticalSection &other) = delete;
+ CriticalSection &operator=(const CriticalSection &other) = delete;
+
+ void lock() {
+ ::EnterCriticalSection(&critical_section);
+ };
+
+ bool try_lock() {
+ return ::TryEnterCriticalSection(&critical_section) != 0;
+ };
+
+ void unlock() {
+ ::LeaveCriticalSection(&critical_section);
+ }
+};
+
+#endif