对比「pthread_mutex_t」,功能都一样,只是使用上更加方便和灵活。毕竟经过c++大佬们深思熟虑设计出来的,如果没有优势,也就不会发布出来。 lock_guard lock_guard功能与std::mutex的lock与ublock功能相同。不同的是,lock_guard析构时会自动解锁,使用时无须unlock。这就需要我们将共享资源的访问封装成尽可能小的函数...
unique_lock(_Mutex& _Mtx, adopt_lock_t) : _Pmtx(&_Mtx), _Owns(true) { // construct and assume already locked } unique_lock(_Mutex& _Mtx, defer_lock_t) _NOEXCEPT : _Pmtx(&_Mtx), _Owns(false) { // construct but don't lock } unique_lock(_Mutex& _Mtx, try_to_lock_t) ...
pthread_mutex_t //锁的数据类型 pthread_mutex_lock()//加锁,如果当前其他线程正占用锁,那么阻塞,直到得到锁 pthread_ulock()//解锁 pthread_guard//封装成具有作用域特性的锁 pthread_cond_t wait //条件变量,一般用于多个线程的同步 pthread_destory()//销毁锁 案例一: 初始化: pthread_mutex_t mutex =...
class MutexLock:public Noncopyable //表达语义 { public: MutexLock() { pthread_mutex_init(&_mutex, NULL); } ~MutexLock() { pthread_mutex_destroy(&_mutex); } void lock() { pthread_mutex_lock(&_mutex);} void unlock() { pthread_mutex_unlock(&_mutex);} pthread_mutex_t * getMutexLock...
#include<mutex>/*std::mutex、 std::lock_guard*/#include<iostram>std::mutex mutex;int counter=0;voidtestFunc(){//lock_guard 互斥锁 作用域内上锁std::lock_guard<std::mutex>lockGuard(mutex);//函数体counter++;}//函数结束时,作用域结束,自动释放intmain(){testFunc();std::cout<<"counter ...
(gdb) bt#0 __pthread_mutex_lock (mutex=0x2f20aa75e6f4000) at pthread_mutex_lock.c:50#1 0x000000000041a2dcin__gthread_mutex_lock (__mutex=0xff282ceacb40) at /usr/include/c++/4.6/x86_64-linux-gnu/./bits/gthr-default.h:742#2 lock (this=0xff282ceacb40) at /usr/include/c++/4.6/...
与 pthread_mutex_t 实例内部状态的一致性。但当你使用 pthread_cond_wait 的时候，你必须把 MutexLoc...
#include "pthread.h" #define USE_MUTEX 1/* 是否使用互斥锁,使用,0不使用 */ #if USE_MUTEX std::mutexs_mutex; #endif staticint8_tg_count=0; void*thread0_entry(void*data) { uint8_ti=0; #if USE_MUTEX conststd::lock_guard<std::mutex>lock(s_mutex); ...
std::lock_guard is a class template in the C++ standard library that provides a convenient way to acquire and release a lock on a std::mutex object As for your question, std::lock_guard<std::mutex> does not directly depend on the pthread library. However, the implementation of std::mut...
std::lock_guard<std::mutex>lock(my_lock); auto endTime=std::chrono::high_resolution_clock::now(); auto elapsedTime= std::chrono::duration_cast<std::chrono::seconds>(endTime -beginTime); std::this_thread::sleep_for(std::chrono::milliseconds(1000)); ...