Linux多线程实例练习 - pthread_cancel()

#include <pthread.h>
#include <stdio.h>
#include <unistd.h>

#define debug_Msg(fmt, arg...)\
do{\
printf("%s %d : ", __FILE__, __LINE__);\
printf(fmt, ##arg);\
}while(0)

#define ENABLE_X
char * pe = "enable  return";
void * state_Enable(void *arg)
{
int i = 0;
int iExit = 0;
while(i < 10 && iExit == 0)
{
debug_Msg("state Enable  : [%d]\n", i);
i++;
sleep(1);
}
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 = 0;
int iExit = 0;
while(i < 10 && iExit == 0)
{
debug_Msg("state Disable : [%d]\n", i);
i++;
sleep(1);
}
char * p = pd;
return p;
}

int main()
{
#ifdef ENABLE_X
pthread_t pid;
pthread_create(&pid, NULL, state_Enable, NULL);
sleep(3);
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(3);
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
}

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

$ ./xx_pthread_cancel
xx_pthread_cancel.c 19 : state Enable  : [0]
xx_pthread_cancel.c 19 : state Enable  : [1]
xx_pthread_cancel.c 19 : state Enable  : [2]
init with : [00000000]
pe addr   : [08048959]
over with : [FFFFFFFF]
xx_pthread_cancel.c 36 : state Disable : [0]
xx_pthread_cancel.c 36 : state Disable : [1]
xx_pthread_cancel.c 36 : state Disable : [2]
init with : [00000000]
xx_pthread_cancel.c 36 : state Disable : [3]
xx_pthread_cancel.c 36 : state Disable : [4]
xx_pthread_cancel.c 36 : state Disable : [5]
xx_pthread_cancel.c 36 : state Disable : [6]
xx_pthread_cancel.c 36 : state Disable : [7]
xx_pthread_cancel.c 36 : state Disable : [8]
xx_pthread_cancel.c 36 : state Disable : [9]
pd addr   : [08048968]
over with : [08048968]