zthread学习 实例七 线程本地存储

   消除任务在共享资源上发生冲突问题的第二种方法是 消除共享变量，对使用同一个变量的不同线程，可以为同一个变量创建不同的存储单元。因此，如果有5个线程使用一个含有变量x的对象，线程本地存储会自动为变量产生5个不同的存储单元。

#include "stdafx.h" #include <iostream> #include <fstream> #include "zthread/ThreadLocal.h" #include "zthread/Guard.h" #include "zthread/Mutex.h" #include "zthread/ThreadedExecutor.h" #include "zthread/Cancelable.h" #include "zthread/Runnable.h" #include "zthread/Thread.h" using namespace ZThread; using namespace std; class ThreadVariables : public Cancelable { public: ThreadVariables(): canceled(false) { Value.set(0); } void increament() {Value.set(Value.get() + 1);} int get() {return Value.get();} void cancel() { Guard<Mutex> g(Lock); canceled = true; } bool isCanceled() { Guard<Mutex> g(Lock); return canceled; } private: ThreadLocal<int> Value; bool canceled; Mutex Lock; }; class Accessor : public Runnable { public: Accessor(const CountedPtr<ThreadVariables>& tl, int idn = 0): id(idn), pTlv(tl) {} void run() { while (!pTlv->isCanceled()) { pTlv->increament(); cout<<*this<<endl; } } friend ostream& operator <<(ostream& os, Accessor& a) { Thread::sleep(200); return os << " # " << a.id << " : " << a.pTlv->get()<<endl; } private: int id; CountedPtr<ThreadVariables> pTlv; }; int _tmain(int argc, _TCHAR* argv[]) { try { CountedPtr<ThreadVariables> tlv(new ThreadVariables); ThreadedExecutor executor; for (int i = 0; i < 5; i++) { executor.execute(new Accessor(tlv, i)); } cin.get(); tlv->cancel(); } catch (Synchronization_Exception& e) { cerr << e.what() <<endl; } cin.get(); return 0; }