c++互斥锁的实现

 1 class IMyLock
 2 {
 3 public:
 4     virtual ~IMyLock(){}
 5 
 6     virtual void Lock() const = 0;
 7     virtual void UnLock() const = 0;
 8 };
 9 
10 class Mutex : public IMyLock
11 {
12 public:
13     Mutex();
14     ~Mutex();
15 
16     virtual void Lock() const;
17     virtual void UnLock() const;
18 private:
19     HANDLE Mutex_;
20 };
21 
22 Mutex::Mutex(){
23     Mutex_ = ::CreateMutex(NULL, false, NULL);
24 }
25 
26 void Mutex::Lock() const
27 {
28     WaitForSingleObject(Mutex_, INFINITE);
29 }
30 
31 void Mutex::UnLock() const
32 {
33     ::ReleaseMutex(Mutex_);
34 }
35 
36 class CLock{
37 public:
38     CLock(const IMyLock&);
39     ~CLock();
40 
41 private:
42     const IMyLock& myLock_;            //纯虚类可以这样声明对象
43 };
44 
45 CLock::CLock(const IMyLock& lock) :myLock_(lock)
46 {
47     myLock_.Lock();
48 }
49 CLock::~CLock(){
50     myLock_.UnLock();
51 }