111 lines
2.2 KiB
C++
111 lines
2.2 KiB
C++
#include <iostream>
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#include "Singleton.h"
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/*单例模式简单实现*/
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/*
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int main()
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{
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Singleton *s1 = Singleton::getInstance();
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Singleton *s2 = Singleton::getInstance();
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system("pause");
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return 0;
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}
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*/
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#ifdef win32
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/*非线程安全 单例模式*/
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#include <process.h>
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#include <Windows.h>
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//多线程，线程数目：5
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#define THREAD_NUM 5
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unsigned int __stdcall CallSingleton(void *pPM)
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{
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Singleton *s = Singleton::getInstance();
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int nThreadNum = *(int *)pPM;
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Sleep(50);
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//printf("线程编号为%d\n", nThreadNum);
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return 0;
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}
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int main()
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{
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HANDLE handle[THREAD_NUM];
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//线程编号
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int threadNum = 0;
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while (threadNum < THREAD_NUM)
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{
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handle[threadNum] = (HANDLE)_beginthreadex(NULL, 0, CallSingleton, &threadNum, 0, NULL);
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//等子线程接收到参数时主线程可能改变了这个i的值
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threadNum++;
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}
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//保证子线程已全部运行结束
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WaitForMultipleObjects(THREAD_NUM, handle, TRUE, INFINITE);
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system("pause");
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return 0;
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}
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/* for linux platform */
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#else
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#define THREAD_NUM 6
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#include<pthread.h>
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void* callSingleton_Lazy(void*)
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{
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Singleton_Lazy *s = Singleton_Lazy::getInstance();
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pthread_t nThreadNum = pthread_self();
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// sleep(50);
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printf("线程编号为%lu\n", nThreadNum);
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return 0;
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}
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void* callSingleton_Hungry(void*)
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{
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Singleton_Hungry *s = Singleton_Hungry::getInstance();
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pthread_t nThreadNum = pthread_self();
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// sleep(50);
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printf("线程编号为%ld\n", nThreadNum);
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return 0;
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}
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int main()
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{
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pthread_t threads_pool[THREAD_NUM];
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int tids[THREAD_NUM], i;
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void* status;
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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for(i = 0; i < THREAD_NUM; i++)
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{
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if(i < THREAD_NUM / 2)
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tids[i] = pthread_create(&threads_pool[i], NULL, callSingleton_Lazy, (void*)&i);
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else
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tids[i] = pthread_create(&threads_pool[i], NULL, callSingleton_Hungry, (void*)&i);
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if(tids[i])
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{
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printf("Error: unable to create thread.\n");
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exit(-1);
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}
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}
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pthread_attr_destroy(&attr);
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for(i = 0; i < THREAD_NUM; i++)
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{
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tids[i] = pthread_join(threads_pool[i], &status);
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if(tids[i])
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{
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printf("Error: unable to join.\n");
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exit(-1);
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}
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}
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printf("main exiting.\n");
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return 0;
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}
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#endif |