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 : []