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/**
* @file _thread.h
* @brief thread type abstraction
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2012, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LLCOREINT_THREAD_H_
#define LLCOREINT_THREAD_H_
#include "linden_common.h"
#include <boost/thread.hpp>
#include <boost/function.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include "apr.h" // thread-related functions
#include "_refcounted.h"
namespace LLCoreInt
{
class HttpThread : public RefCounted
{
private:
HttpThread(); // Not defined
void operator=(const HttpThread &); // Not defined
void at_exit()
{
// the thread function has exited so we need to release our reference
// to ourself so that we will be automagically cleaned up.
release();
}
void run()
{ // THREAD CONTEXT
// Take out additional reference for the at_exit handler
addRef();
boost::this_thread::at_thread_exit(boost::bind(&HttpThread::at_exit, this));
// run the thread function
mThreadFunc(this);
} // THREAD CONTEXT
protected:
virtual ~HttpThread()
{
delete mThread;
}
public:
/// Constructs a thread object for concurrent execution but does
/// not start running. Caller receives on refcount on the thread
/// instance. If the thread is started, another will be taken
/// out for the exit handler.
explicit HttpThread(boost::function<void (HttpThread *)> threadFunc)
: RefCounted(true), // implicit reference
mThreadFunc(threadFunc)
{
// this creates a boost thread that will call HttpThread::run on this instance
// and pass it the threadfunc callable...
boost::function<void()> f = boost::bind(&HttpThread::run, this);
mThread = new boost::thread(f);
}
inline void join()
{
mThread->join();
}
inline bool timedJoin(S32 millis)
{
return mThread->timed_join(boost::posix_time::milliseconds(millis));
}
inline bool joinable() const
{
return mThread->joinable();
}
// A very hostile method to force a thread to quit
inline void cancel()
{
boost::thread::native_handle_type thread(mThread->native_handle());
#if LL_WINDOWS
TerminateThread(thread, 0);
#else
pthread_cancel(thread);
#endif
}
private:
boost::function<void(HttpThread *)> mThreadFunc;
boost::thread * mThread;
}; // end class HttpThread
} // end namespace LLCoreInt
#endif // LLCOREINT_THREAD_H_
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