qt 中使用pthread

Posted 2020-12-10 warmlight

qt有自己的线程实现方式，但有时候我们由于某些原因，会用到pthread来实现多线程。

我把自己看到过的pthread使用方法记下来。如果你有更好的方法，或觉得此方法有什么缺点，请在评论区指出。

这个类去掉了一些冗余代码，编译时可能出现小错误。

 

CRecvJson.cpp

 1 #include "ReceiveJson.h"
 2 #include<sys/time.h>
 3 #include<unistd.h>
 4 
 5 void sleep_ms(unsigned int secs)
 6 {
 7     struct timeval tval;
 8     tval.tv_sec = secs / 1000;
 9     tval.tv_usec = (secs * 1000) % 1000000;
10     select(0, NULL, NULL, NULL, &tval);
11 }
12 
13 unsigned long TimeElapseUs(timeval& start, timeval& end)
14 {
15     unsigned long un1 = 1000000*(end.tv_sec - start.tv_sec);
16     unsigned long un2 = (end.tv_usec - start.tv_usec);
17     unsigned long diff = un1 + un2;
18 
19     return diff;
20 }
21 
22 CReceiveJson::CReceiveJson(void)
23 {
24 }
25 
26 
27 CReceiveJson::~CReceiveJson(void)
28 {
29 }
30 
31 void CReceiveJson::PushJsonData(char* pRecv, int nRecvLen)
32 {
33     char* pRecvData = new char[nRecvLen + 1];
34     memset(pRecvData, 0, nRecvLen + 1);
35     memcpy(pRecvData, pRecv, nRecvLen);
36 
37     m_lock.Lock();    
38     m_dequeJson.push_front(pRecvData);
39     m_lock.UnLock();
40 }
41 
42 void CReceiveJson::InitRecvThd()
43 {
44     m_bRecvRunning = true;
45     int nRet = pthread_create(&m_recvThdId, NULL, RecieveThd, this);
46     if(nRet == 0)
47     {
48 
49     }
50 }
51 
52 void CReceiveJson::UnInitParaseThd()
53 {
54     m_bRecvRunning = false;
55 }
56 
57 void *CReceiveJson::RecieveThd(void* lParam)
58 {
59     CReceiveJson* pThis = (CReceiveJson*)lParam;
60     pThis->DoRecieve();
61 
62     return NULL;
63 }
64 
65 void CReceiveJson::DoRecieve()
66 {
67     while(m_bRecvRunning)
68     {
69         if (m_dequeJson.size() > 0)
70         {
71             m_lock.Lock();
72             char* pRecieve = m_dequeJson.back();
73 
74             PopJsonData();
75             m_lock.UnLock();
76         }
77 
78         sleep_ms(ThdSleepTime);
79     }
80 
81     pthread_detach(m_recvThdId);
82 }
83 
84 void CReceiveJson::PopJsonData()
85 {
86     char* p = m_dequeJson.back();
87     delete[] p;
88     p = NULL;
89     m_dequeJson.pop_back();
90 }

View Code

 

CRecvJson.h

 1 #pragma once
 2 #include "TLock.h"
 3 #include <deque>
 4 #include<map>
 5 #include<pthread.h>
 6 #include<string>
 7 
 8 using namespace std;
 9 
10 class CReceiveJson
11 {
12 public:
13     CReceiveJson(void);
14     ~CReceiveJson(void);
15 public:
16     void PushJsonData(char* pRecv, int nRecvLen);
17     void UnInitParaseThd();
18     static void* RecieveThd(void* lParam);
19     void InitRecvThd();
20 private:
21     TLock m_lock;
22     deque<char*> m_dequeJson;
23     bool m_bRecvRunning;
24     pthread_t m_recvThdId;
25 
26 
27     void DoRecieve();
28     void PopJsonData();
29 
30     //bool IsHeartBeatTimeOut( struct lws* wsi, map<lws*, timeval>& mapHb );
31 };

View Code

 

TLock.h

 1 /**
 2 * @file
 3 * @brief 对锁的封装
 4 * @Author
 5 * @date
 6 */
 7 #ifndef __SIROTLOCK_H__
 8 #define __SIROTLOCK_H__
 9 #pragma once
10 
11 #if 0
12 #include <windows.h>
13 
14 #define  T_MUTEX                CRITICAL_SECTION //利用临界区实现的锁变量
15 #define  T_MUTEX_INIT(m)        InitializeCriticalSection(m)
16 #define  T_MUTEX_LOCK(m)        EnterCriticalSection(m)
17 #define  T_MUTEX_UNLOCK(m)        LeaveCriticalSection(m)
18 #define  T_MUTEX_DESTORY(m)        DeleteCriticalSection(m)
19 
20 #else    
21 #include<pthread.h>
22 #define  T_MUTEX                pthread_mutex_t
23 #define  T_MUTEX_INIT(m)        pthread_mutex_init(m,NULL)
24 #define  T_MUTEX_LOCK(m)        pthread_mutex_lock(m)
25 #define  T_MUTEX_UNLOCK(m)        pthread_mutex_unlock(m)
26 #define  T_MUTEX_DESTORY(m)        pthread_mutex_destroy(m)
27 
28 #endif
29 
30 
31 class  TLock
32 {
33 public:
34     TLock(void)
35     {
36         T_MUTEX_INIT(&m_Lock);
37     }
38 
39     ~TLock(void)
40     {
41         T_MUTEX_DESTORY(&m_Lock);
42     }
43 
44 public:
45     void Lock() { T_MUTEX_LOCK(&m_Lock); }
46     void UnLock() { T_MUTEX_UNLOCK(&m_Lock); }
47 private:
48     T_MUTEX    m_Lock;
49 };
50 
51 #endif

View Code