48 lines
2.0 KiB
C++
48 lines
2.0 KiB
C++
// Copyright (C) 2010 Vicente Botet
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <iostream>
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#include <boost/thread.hpp>
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#include <boost/current_function.hpp>
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class boostThreadLocksTest
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{
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public:
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boost::shared_mutex myMutex;
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//boost::upgrade_lock<boost::shared_mutex> myLock;
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static int firstFunction(boostThreadLocksTest *pBoostThreadLocksTest);
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static int secondFunction(boostThreadLocksTest *pBoostThreadLocksTest,
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boost::upgrade_lock<boost::shared_mutex>& upgr);
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boostThreadLocksTest()
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:myMutex()
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//, myLock(myMutex,boost::defer_lock_t())
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{}
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};
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int boostThreadLocksTest::firstFunction(boostThreadLocksTest *pBoostThreadLocksTest)
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{
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std::cout<<"Entering "<<boost::this_thread::get_id()<<" "<<"firstFunction"<<std::endl;
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boost::upgrade_lock<boost::shared_mutex> myLock(pBoostThreadLocksTest->myMutex);
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pBoostThreadLocksTest->secondFunction(pBoostThreadLocksTest, myLock);
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std::cout<<"Returned From Call "<<boost::this_thread::get_id()<<" "<<"firstFunction"<<std::endl;
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std::cout<<"Returning from "<<boost::this_thread::get_id()<<" "<<"firstFunction"<<std::endl;
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return(0);
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}
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int boostThreadLocksTest::secondFunction(boostThreadLocksTest *, boost::upgrade_lock<boost::shared_mutex>& upgr) {
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std::cout<<"Before Exclusive Locking "<<boost::this_thread::get_id()<<" "<<"secondFunction"<<std::endl;
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boost::upgrade_to_unique_lock<boost::shared_mutex> localUniqueLock(upgr);
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std::cout<<"After Exclusive Locking "<<boost::this_thread::get_id()<<" "<<"secondFunction"<<std::endl;
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return(0);
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}
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int main() {
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boostThreadLocksTest myObject;
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boost::thread_group myThreadGroup;
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myThreadGroup.create_thread(boost::bind(boostThreadLocksTest::firstFunction,&myObject));
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myThreadGroup.create_thread(boost::bind(boostThreadLocksTest::firstFunction,&myObject));
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myThreadGroup.create_thread(boost::bind(boostThreadLocksTest::firstFunction,&myObject));
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myThreadGroup.join_all();
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return 0;
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}
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