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