};voidthr(std::shared_ptr<Base> p){std::this_thread::sleep_for(std::chrono::seconds(1));std::shared_ptr<Base> lp = p;// 线程安全,虽然自增共享的 use_count{staticstd::mutex io_mutex;std::lock_guard<std::mutex>lk(io_mutex);std::cout<<"local pointer in a thread:\n"<<" lp...
复制 #include<vector>#include<memory>#include<thread>classMyClass{// 类的定义};std::vector<std::unique_ptr<MyClass>>createVectorWithThreads(){std::vector<std::unique_ptr<MyClass>>vec;// 创建线程并向向量中添加元素std::threadt1([&vec](){vec.push_back(std::make_unique<MyClass>());})...
std::thread td([sp1]()){...}); 另个线程传递的shared_ptr是值传递,而非引用: void fn(shared_ptr<A>sp) { ... } .. std::thread td(fn, sp1); 这时候每个线程内看到的sp,他们所管理的是同一份数据,用的是同一个引用计数。但是各自是不同的对象,当发生多线程中修改sp指向的操作的时候,是...
#include<iostream>#include<memory>#include<thread>#include<chrono>#include<mutex>structBase{Base(){std::cout<<" Base::Base()\n";}// 注意:此处非虚析构函数 OK~Base(){std::cout<<" Base::~Base()\n";}};structDerived:publicBase{Derived(){std::cout<<" Derived::Derived()\n";}~Deriv...
#include <thread> #include <memory> #include <iostream> #include <assert.h> class A { public: A() { std::cout << "A Create" << std::endl; } ~A() { std::cout << "A Destroy" << std::endl; } void fun() { std::cout << "A Fun" << std::endl; ...
int pthread_join(pthread_t thread, void **rval_ptr); // 返回:成功返回0,出错返回错误代码 thread是目标线程标识符,rval_ptr指向目标线程返回时的退出信息,该函数会一直阻塞,直到被回收的线程结束为止。可能的错误码为: pthread_cancel #include <pthread.h> ...
while(true){std::this_thread::sleep_for(std::chrono::seconds(1));intelapsed_time=current_time...
local pointer in a thread: lp.get() = 0x2299b30, lp.use_count() = 2 Derived::~Derived() Base::~Base() All threads completed, the last one deleted Derived weak_ptr 是为了配合shared_ptr而引入的一种智能指针,没有重载operator*和->,它的最大作用在于协助shared_ptr工作,像旁观者那样观测资源...
if(!ThreadPoolMan::Instruct(ppoolparam)){ if(!ThreadPoolMan::Instruct(std::move(ppoolparam))){ S3FS_PRN_ERR("failed setup instruction for uploading."); delete ppoolparam; delete thargs; return false; }20 changes: 6 additions & 14 deletions 20 src/threadpoolman.cpp Original file line ...
无法知道是该使用 delete 还是其他析构机制来销毁 p 如果是使用 delete 来销毁 p，无法知道是该使用 ...