boost之mutex scoped_lock

1.boost裏的互斥量類型由mutex表示。ios

代碼示例:this

 

#include <iostream>
#include <string>
#include <vector>
#include <boost/thread.hpp>
#include <boost/thread/mutex.hpp>
using namespace std;
using namespace boost;

int main()
{
	mutex mu;
	try
	{
		this_thread::sleep(posix_time::seconds(2));
		mu.lock();//鎖定cout對象
		cout << "Some operations" <<endl;
		mu.unlock();
	}
	catch(int)
	{
		mu.unlock();
		return 0;
	}
	
}

二.上面的代碼好像似曾相識,是的,在防止內存泄露的時候採用的和上面相似的處理方式,更加簡潔的方式是智能指針,相似的咱們須要用智能鎖改寫上面的代碼scoped_lock智能鎖。atom

#include <iostream>
#include <string>
#include <vector>
#include <boost/thread.hpp>
#include <boost/thread/mutex.hpp>
using namespace std;
using namespace boost;


template<typename T>
class basic_atom:noncopyable
{
private:
	T n;
	typedef mutex mutex_t;
	mutex_t mu;
public:
	basic_atom(T x = T()):n(x){}
	T operator++()
	{
		mutex_t::scoped_lock lock(mu);
		return ++n;
	}
	operator T(){return n;}
};

int main()
{
	return 0;
	
}
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