Thread/Thread: replacement library for GThread

src/thread/Thread.hxx

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_THREAD_HXX
+#define MPD_THREAD_HXX
+
+#include "check.h"
+#include "Compiler.h"
+
+#ifdef WIN32
+#include <windows.h>
+#else
+#include <pthread.h>
+#endif
+
+#include <assert.h>
+
+class Error;
+
+class Thread {
+#ifdef WIN32
+	HANDLE handle;
+	DWORD id;
+#else
+	pthread_t handle;
+	bool defined;
+
+#ifndef NDEBUG
+	/**
+	 * The thread is currently being created.  This is a workaround for
+	 * IsInside(), which may return false until pthread_create() has
+	 * initialised the #handle.
+	 */
+	bool creating;
+#endif
+#endif
+
+	void (*f)(void *ctx);
+	void *ctx;
+
+public:
+#ifdef WIN32
+	Thread():handle(nullptr) {}
+#else
+	Thread():defined(false) {
+#ifndef NDEBUG
+		creating = false;
+#endif
+	}
+#endif
+
+	Thread(const Thread &) = delete;
+
+#ifndef NDEBUG
+	virtual ~Thread() {
+		/* all Thread objects must be destructed manually by calling
+		   Join(), to clean up */
+		assert(!IsDefined());
+	}
+#endif
+
+	bool IsDefined() const {
+#ifdef WIN32
+		return handle != nullptr;
+#else
+		return defined;
+#endif
+  }
+
+	/**
+	 * Check if this thread is the current thread.
+	 */
+	gcc_pure
+	bool IsInside() const {
+#ifdef WIN32
+		return GetCurrentThreadId() == id;
+#else
+#ifdef NDEBUG
+		constexpr bool creating = false;
+#endif
+		return IsDefined() && (creating ||
+				       pthread_equal(pthread_self(), handle));
+#endif
+	}
+
+	bool Start(void (*f)(void *ctx), void *ctx, Error &error);
+	void Join();
+
+private:
+#ifdef WIN32
+	static DWORD WINAPI ThreadProc(LPVOID ctx);
+#else
+	static void *ThreadProc(void *ctx);
+#endif
+
+};
+
+#endif