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/*
* Copyright 2003-2017 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 Thread {
#ifdef _WIN32
HANDLE handle = nullptr;
DWORD id;
#else
pthread_t handle;
bool defined = false;
#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 = false;
#endif
#endif
void (*f)(void *ctx);
void *ctx;
public:
Thread() = default;
Thread(const Thread &) = delete;
#ifndef NDEBUG
~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 noexcept {
#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);
void Join();
private:
#ifdef _WIN32
static DWORD WINAPI ThreadProc(LPVOID ctx);
#else
static void *ThreadProc(void *ctx);
#endif
};
#endif
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