Linux多线程实例练习 - pthread_cancel()

Linux多线程实例练习 - pthread_cancel

1、代码 xx_pthread_cancel.c

#include <pthread.h>

#include <stdio.h>

#include <unistd.h>

#define debug_Msg(fmt, arg...)\

    do{\

        printf("%s %d : ", __FILE__, __LINE__);\

        printf(fmt, ##arg);\

    }while()

#define ENABLE_X

char * pe = "enable  return";

void * state_Enable(void *arg)

{

    int i = ;

    int iExit = ;

    while(i <  && iExit == )

    {

        debug_Msg("state Enable  : [%d]\n", i);

        i++;

        sleep();

    }

    char * p = pe;

    return p;

}

#define DISABLE_X

char * pd = "disable return";

void * state_Disable(void * arg)

{

    pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);

    int i = ;

    int iExit = ;

    while(i <  && iExit == )

    {

        debug_Msg("state Disable : [%d]\n", i);

        i++;

        sleep();

    }

    char * p = pd;

    return p;

}

int main()

{

#ifdef ENABLE_X

    pthread_t pid;

    pthread_create(&pid, NULL, state_Enable, NULL);

    sleep();

    pthread_cancel(pid);

    void * p = NULL;

    printf("init with : [%08X]\n", (unsigned int)p);

    pthread_join(pid, &p);

    printf("pe addr   : [%08X]\n", (unsigned int)pe);

    printf("over with : [%08X]\n", (unsigned int)p);

#endif

#ifdef DISABLE_X

    pthread_t pDis;

    pthread_create(&pDis, NULL, state_Disable, NULL);

    sleep();

    pthread_cancel(pDis);

    p = NULL;

    printf("init with : [%08X]\n", (unsigned int)p);

    pthread_join(pDis, &p);

    printf("pd addr   : [%08X]\n", (unsigned int)pd);

    printf("over with : [%08X]\n", (unsigned int)p);

#endif

}

2、CentOS 编译通过

g++ -g -c -o xx_pthread_cancel.o xx_pthread_cancel.c

g++ -g -o xx_pthread_cancel xx_pthread_cancel.o -lpthread

3、运行结果

$ ./xx_pthread_cancel

xx_pthread_cancel.c  : state Enable  : []

xx_pthread_cancel.c  : state Enable  : []

xx_pthread_cancel.c  : state Enable  : []

init with : []

pe addr   : []

over with : [FFFFFFFF]

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

init with : []

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

xx_pthread_cancel.c  : state Disable : []

pd addr   : []

over with : []