#include <iostream> // std::cout #include <atomic> // std::atomic #include <thread> // std::thread #include <vector> // std::vector std::atomic<bool> ready (false); std::atomic<bool> winner (false); void count1m (int id) { while (!ready) {} // wait for the ready signal...
*/#ifndefincl_HPHP_ATOMIC_VECTOR_H#defineincl_HPHP_ATOMIC_VECTOR_H#include<atomic>#include<memory>//#include "folly/String.h"//#include "trace.h"#defineFTRACE(...)do{}while(0)#defineTRACE_SET_MOD(name)namespaceHPHP{/* * AtomicVector is a simple vector intended for use by many conc...
{ // insert item tb_vector_insert_tail(vector, "hello"); tb_vector_insert_tail(vector, "tbox"); // dump all items tb_for_all (tb_char_t const*, cstr, vector) { // trace tb_trace_i("%s", cstr); } // exit vector tb_vector_exit(vector); } // init stream tb_stream_ref...
notify_all (C++20) 提醒所有在原子对象上的等待中阻塞的线程 #include<thread>#include<vector>#include<iostream>#include<atomic>std::atomic_flag lock = ATOMIC_FLAG_INIT;voidf(intn){for(intcnt =0; cnt <100; ++cnt) {while(lock.test_and_set(std::memory_order_acquire))// 获得锁;// 自旋s...
"atomic": "cpp", "bit": "cpp", "cctype": "cpp", "clocale": "cpp", "cmath": "cpp", "compare": "cpp", "concepts": "cpp", "cstddef": "cpp", "cstdint": "cpp", "cstdio": "cpp", "cstdlib": "cpp", "cstring": "cpp", ...
提供atomic、atomic64接口 提供高精度、低精度定时器 提供高性能的线程池操作 提供event、mutex、semaphore、spinlock等事件、互斥、信号量、自旋锁操作 提供获取函数堆栈信息的接口,方便调试和错误定位 提供跨平台动态库加载接口(如果系统支持的话) 提供io轮询器,针对epoll, poll, select, kqueue进行跨平台封装 ...
can’t yet support something like atomic AVX/SSE vector because it’s CPU-dependent 正确.通过缓存一致性系统,无法检测128b或256b存储或加载何时是原子的. (https://gcc./bugzilla/show_bug.cgi?id=70490).甚至在L1D和执行单元之间具有原子传输的系统也可能在通过窄协议在高速缓存之间传输高速缓存行时在8B...
C++11标准中的基本std::atomic模板定义如下：template<class T>struct atomic{ bool is_lock_free()const volatile;bool is_lock_free()const;void store(T,memory_order=memory_order_seq_cst)volatile;void store(T,memory_order=memory_order_seq_cst);T load(memory_order=memory_order_seq_cst)const ...
B')break;printf("BBB ");Sleep(200); //延时}}VOID C(PVOID p) //线程C{while (1){if (c=='c'||c=='C')break;printf("CCC ");Sleep(300); }}void A(){_beginthread(B, 0, 0); //启动B_beginthread(C, 0, 0); //启动C}int main(){A();printf(...
atomic 和 nonatomic 用来决定编译器生成的 getter和 setter 是原子操作还是非原子操作。 atomic 设置成员变量的@property属性时,默认为atomic,即原子操作,对同一对象的set和get的操作是顺序执行的,以提供多线程安全。 在多线程环境下,原子操作是必要的,否则有可能引起错误的结果。加了atomic,setter函数会变成下面这样:...