多线程封装

//Thread.hpp
#pragma once
#include<iostream>
#include<string>
#include<cstring>
#include<functional>
#include<unistd.h>
#include<cassert>
#include<pthread.h>
class Thread;
//上下文
class Context{
public:Thread *this_;void *args_;
public:Context():this_(nullptr),args_(nullptr){}~Context(){}
};
class Thread{//using func_t = std::function<void*(void*)>;typedef std::function<void*(void*)> func_t;const int num=1024;
public:Thread(func_t func,void *args,int number):func_(func),args_(args){char buffer[num];snprintf(buffer,sizeof buffer,"thread-%d",number);name_=buffer; }//在类内创建线程，想让线程执行对应的方法，需要将方法设置为staticstatic void *start_routine(void *args){//类内成员，有缺省参数//静态方法不能调用非静态成员方法或者成员变量// return func_(args_);Context *ctx=static_cast<Context*>(args);void *ret=ctx->this_->run(ctx->args_);delete ctx;return ret;}void start(){Context *ctx=new Context();ctx->this_=this;ctx->args_=args_;int n=pthread_create(&tid_,nullptr,start_routine,ctx);assert(n==0);(void)n;}void join(){int n=pthread_join(tid_,nullptr);assert(n==0);(void)n;}void *run(void *args){return func_(args);}~Thread(){//do nothing}
private:std::string name_;func_t func_;void *args_;pthread_t tid_;
};