115 lines
2.2 KiB
C++
115 lines
2.2 KiB
C++
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/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_THREAD_HXX
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#define MPD_THREAD_HXX
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#include "check.h"
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#include "Compiler.h"
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#ifdef WIN32
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#include <windows.h>
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#else
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#include <pthread.h>
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#endif
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#include <assert.h>
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class Error;
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class Thread {
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#ifdef WIN32
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HANDLE handle;
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DWORD id;
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#else
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pthread_t handle;
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bool defined;
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#ifndef NDEBUG
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/**
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* The thread is currently being created. This is a workaround for
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* IsInside(), which may return false until pthread_create() has
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* initialised the #handle.
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*/
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bool creating;
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#endif
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#endif
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void (*f)(void *ctx);
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void *ctx;
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public:
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#ifdef WIN32
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Thread():handle(nullptr) {}
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#else
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Thread():defined(false) {
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#ifndef NDEBUG
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creating = false;
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#endif
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}
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#endif
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Thread(const Thread &) = delete;
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#ifndef NDEBUG
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virtual ~Thread() {
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/* all Thread objects must be destructed manually by calling
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Join(), to clean up */
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assert(!IsDefined());
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}
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#endif
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bool IsDefined() const {
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#ifdef WIN32
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return handle != nullptr;
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#else
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return defined;
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#endif
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}
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/**
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* Check if this thread is the current thread.
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*/
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gcc_pure
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bool IsInside() const {
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#ifdef WIN32
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return GetCurrentThreadId() == id;
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#else
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#ifdef NDEBUG
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constexpr bool creating = false;
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#endif
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return IsDefined() && (creating ||
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pthread_equal(pthread_self(), handle));
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#endif
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}
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bool Start(void (*f)(void *ctx), void *ctx, Error &error);
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void Join();
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private:
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#ifdef WIN32
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static DWORD WINAPI ThreadProc(LPVOID ctx);
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#else
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static void *ThreadProc(void *ctx);
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#endif
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};
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#endif
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