109 lines
2.2 KiB
C++
109 lines
2.2 KiB
C++
/*
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* Copyright (C) 2003-2014 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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#include "config.h"
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#include "Thread.hxx"
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#include "util/Error.hxx"
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bool
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Thread::Start(void (*_f)(void *ctx), void *_ctx, Error &error)
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{
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assert(!IsDefined());
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f = _f;
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ctx = _ctx;
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#ifdef WIN32
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handle = ::CreateThread(nullptr, 0, ThreadProc, this, 0, &id);
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if (handle == nullptr) {
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error.SetLastError("Failed to create thread");
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return false;
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}
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#else
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#ifndef NDEBUG
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creating = true;
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#endif
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int e = pthread_create(&handle, nullptr, ThreadProc, this);
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if (e != 0) {
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#ifndef NDEBUG
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creating = false;
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#endif
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error.SetErrno(e, "Failed to create thread");
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return false;
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}
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defined = true;
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#ifndef NDEBUG
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creating = false;
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#endif
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#endif
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return true;
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}
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void
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Thread::Join()
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{
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assert(IsDefined());
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assert(!IsInside());
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#ifdef WIN32
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::WaitForSingleObject(handle, INFINITE);
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::CloseHandle(handle);
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handle = nullptr;
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#else
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pthread_join(handle, nullptr);
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defined = false;
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#endif
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}
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#ifdef WIN32
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DWORD WINAPI
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Thread::ThreadProc(LPVOID ctx)
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{
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Thread &thread = *(Thread *)ctx;
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thread.f(thread.ctx);
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return 0;
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}
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#else
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void *
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Thread::ThreadProc(void *ctx)
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{
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Thread &thread = *(Thread *)ctx;
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#ifndef NDEBUG
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/* this works around a race condition that causes an assertion
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failure due to IsInside() spuriously returning false right
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after the thread has been created, and the calling thread
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hasn't initialised "defined" yet */
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thread.defined = true;
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#endif
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thread.f(thread.ctx);
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return nullptr;
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}
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#endif
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