/** * @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 "_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_