Linux组件封装(一) 互斥锁MutexLock

由于pthread系列的函数都是成功时返回0，我们需要一段判断处理错误的代码:

#define TINY_CHECK(exp)\
        if(!exp)\
        {    \
            fprintf(stderr, "File : %s, Line : %d Exp : ["#exp"] is true, abort.\n", __FILE__, __LINE__); abort();\
        }

 

MutexLock的封装如下:

 1 #ifndef MUTEXLOCK_H
 2 #define MUTEXLOCK_H
 3 
 4 #include "NonCopyable.h"
 5 #include <pthread.h>
 6 #include <stdlib.h>
 7 #include <stdio.h>
 8 #define TINY_CHECK(exp)\
 9         if(!exp)\
10         {    \
11             fprintf(stderr, "File : %s, Line : %d Exp : ["#exp"] is true, abort.\n", __FILE__, __LINE__); abort();\
12         }
13 
14 
15 
16 class MutexLock :  NonCopyable
17 {
18     friend class Condition;
19 public:
20     MutexLock();
21     ~MutexLock();
22     void lock();
23     void unlock();
24 
25     bool isLocked() const { return _isLock; }
26     pthread_mutex_t *getMutexPtr() { return &_mutex; }
27 
28 private:
29     void restoreMutexStatus()
30     { _isLock = true; }
31 
32     pthread_mutex_t _mutex;
33     bool _isLock;
34 };
35 
36 
37 class MutexLockGuard : NonCopyable            //将锁封装到MutexLockGuard中，
38 {                                            //这样只需定义一个对象，便可
39 public:                                        //便可自动上锁，对象销毁时自动解锁
40     MutexLockGuard(MutexLock &mutex)
41         :_mutex(mutex)
42     { _mutex.lock(); }
43 
44     ~MutexLockGuard()
45     { _mutex.unlock(); }
46 
47 private:
48     MutexLock &_mutex;
49 };
50 #define MutexLockGuard(m) "ERROR"
51 
52 #endif

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