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#include "pthread.h"
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/*
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* memtest.c
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* simple memory test
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* Copyright (C) 2008 All rights reserved.
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*
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*/
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void memoryTest(void * arg)
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{
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int *loc = (int *)arg;
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int start_p = *loc;
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int end_p = *(loc + 1);
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int times = *(loc + 2);
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int *totalCorrect_p = loc + 3; // 主线程中记录测试成功的内存单元总个数的变量的指针
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int *totalTimes_p = loc + 4; // 主线程中记录测试内存单元总个数的变量的指针
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char FailFlag = '0'; // 本次测试是否通过的标志，字符‘0’表示通过，‘1’表示测试没有通过
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char random = rand();
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char testData[5] = {0x00, 0xFF, 0x55, 0xAA, random}; // 用于测试的五数据，最后一个是没有被初始化的随机数random没有初始化
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char *i = (char *)start_p;
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int j = 0;
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int k = 0;
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for( ; i <= (char *)end_p; i++)
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{
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for(j = 0; j < times; j++)
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{
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if(*(loc + 5) == 1)
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pthread_exit(0);
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for(k = 0; k < 5; k++) // 五种数据都通过才算是通过测试
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{
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if(*(loc + 5) == 1) // 如果主线程发了终止线程信号，要立刻终止该线程
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pthread_exit(0);
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*i = testData[k];
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if(*i != testData[k])
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{
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FailFlag = '1';
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break;
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}
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}
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if(FailFlag == '1')// times次测试中有一次不成功就算是没有通过测试
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break;
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}
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if(*(loc + 5) == 1) // 如果主线程发了终止线程信号，要立刻终止该线程
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pthread_exit(0);
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if(FailFlag == '0') // 通过时候测试通过的内存单元个数加一
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(*totalCorrect_p)++;
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(*totalTimes_p)++; // 完成的测试内存单元数要加一
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FailFlag = '0';// 标志复位
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}
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pthread_exit(0); // 线程安全退出
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}
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int main()
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{
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char *command[6] = {"thread", "times", "go", "status", "abort", "exit"};// 所有的命令
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char *ThisCommand;
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int TotalThreadsNum = 0; // 线程总数
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int times = 0; // 测试的次数
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pthread_t threads[64] = {0}; // 设置最大64个线程足够使用
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int addrSize = 0;
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// 每个线程有五个参数需要知道:
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// 开始测试地址，结束地址，每个地址测试次数，测试正常的内存单元个数，测试内存单元的总个数、主线程是否发出了终止线程的信号
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// 把第一个参数地址传递过去，其他的四个通过地址增加来共享主线程的数据，从而得到参数或者对参数内容进行读写
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int args[64][6] = {{0}};
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int i = 0;
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int value = 0; // 等待线程结束的返回之存放在这个变量中
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char *testAddr = (char *)malloc(0x000FFFFF); // 申请1MB内存用于测试
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while(1)
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{
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printf(">>>>");
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fflush(stdout);
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scanf("%s",ThisCommand);
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if( strcmp(ThisCommand, command[0]) == 0 ) // thread number
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{
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scanf("%d",&TotalThreadsNum);
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// 读到thread number后设置每个线程需要的开始和结束地址的参数
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// 创建number个线程
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addrSize = 0x000FFFFF / TotalThreadsNum;
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args[0][0] = (int)testAddr;
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args[0][1] = args[0][0] + addrSize - 1;
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for(i = 1; i < TotalThreadsNum - 1; i++)
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{
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args[i][0] = args[i - 1][1] + 1;
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args[i][1] = addrSize + args[i][0] - 1;
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}
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args[i][0] = args[i - 1][1] + 1;
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args[i][1] = (int)testAddr + 0x000FFFFF - 1; // 测试结束的地址
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printf("There will be %d threads.\n",TotalThreadsNum);
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continue;
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}
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if( strcmp(ThisCommand, command[1]) == 0 ) // times
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{
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scanf("%d",×);
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for(i = 0; i < TotalThreadsNum; i++)
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{
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args[i][2] = times;
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}
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printf("Each byte will be tested %d times.\n",times);
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continue;
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}
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if( strcmp(ThisCommand, command[2]) == 0 ) // go
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{
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for(i = 0; i < TotalThreadsNum; i++) // 创建线程
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pthread_create(&threads[i], NULL, (void *)memoryTest, (void *)args[i]);
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continue;
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}
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if( strcmp(ThisCommand, command[3]) == 0 ) // status
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{
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for(i = 0; i < TotalThreadsNum; i++)
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{
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// 为了简化操作，如果本次已经测试的总内存单元数(放在args[i][4])等于分配的总个数或者线程状态被设置为'1'
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// 即可以简单的认为表示本线程已经结束
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if( args[i][4] == args[i][1] - args[i][0] + 1 || args[i][5] == 1 )
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printf("Thread no.%d has exited.(%p-%p, %d/%d/%d)\n", i, args[i][0], args[i][1], args[i][3], args[i][4], args[i][1] - args[i][0] + 1);
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else
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printf("Thread no.%d is running.(%p-%p, %d/%d/%d)\n", i, args[i][0], args[i][1], args[i][3], args[i][4], args[i][1] - args[i][0] + 1);
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}
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continue;
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}
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if( strcmp(ThisCommand, command[4]) == 0 ) // abort
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{
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// 线程终止状态设置为'1'，表示线程被人为退出
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for(i = 0; i < TotalThreadsNum; i++)
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args[i][5] = 1;
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continue;
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}
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if( strcmp(ThisCommand, command[5]) == 0 ) // exit
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{
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for(i = 0; i < TotalThreadsNum; i++) // 给每个线程的标志为设置为1，让其退出
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{
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args[i][5] = 1; // 线程终止状态设置为'1'，表示线程被人为退出
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}
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// 标志为设置为1之后要等待每个线程真正的结束，主线程才能退出，否则主线程释放内存
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// 线程再执行的时候会出现严重的错误
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for(i = 0; i < TotalThreadsNum; i++)
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{
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pthread_join(threads[i], (void *)value);
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}
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return 0;
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}
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}
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return 0;
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}
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