example3_1.cpp

//用互斥元保护列表
#include <list>
#include <mutex>
#include <algorithm>

std::list<int> some_list;
std::mutex some_mutex;

void add_to_list(int new_value)
{
	std::lock_guard<std::mutex> guard(some_mutex);
	some_list.push_back(new_value);
}

bool list_contains(int value_to_find)
{
	std::lock_guard<std::mutex> guard(some_mutex);
	return std::find(some_list.begin(),some_list.end(),value_to_find) != some_list.end();
}