线程本地存储实例

// Copyright (C) 2001-2003
// William E. Kempf
//
//  Distributed under the Boost Software License, Version 1.0. (See accompanying 
//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//  一个使用boost::thread_specific_ptr线程本地存储的示例,value将不受其它线程影响.

#include <boost/thread/thread.hpp>
#include <boost/thread/tss.hpp>

boost::thread_specific_ptr<int> value;

void increment()
{
	int* p = value.get();
	++*p;
}
boost::mutex io_mutex;

void thread_proc()
{
	value.reset(new int(0)); // initialize the thread's storage
	for (int i=0; i<10; ++i)
	{
		increment();
		int* p = value.get();
		boost::mutex::scoped_lock lock(io_mutex);
		std::cout << boost::this_thread::get_id() << " : " << *p <<std::endl; 
	}
}

int main(int argc, char* argv[])
{
	boost::thread_group threads;
	for (int i=0; i<2; ++i)
		threads.create_thread(&thread_proc);
	threads.join_all();
}