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thread.cpp
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//
// Created by jxq on 19-8-14.
//
// p37 poxis 线程(二)
#include <iostream>
#include <stdio.h>
#include <cstring>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
using namespace std;
#define ERR_EXIT(m) \
do \
{ \
perror(m); \
exit(EXIT_FAILURE); \
} while(0);
struct tsd_t
{
int id;
char* arg;
};
pthread_key_t thread_key;
pthread_once_t once = PTHREAD_ONCE_INIT;
void destr_function(void *)
{
printf("destroy...\n");
}
void once_run(void)
{
pthread_key_create(&thread_key, destr_function);
cout<<"once_run in thread "<<(unsigned int )pthread_self()<<endl;
}
void * start_routine (void *arg)
{
pthread_once(&once, once_run);
struct tsd_t *value = (struct tsd_t*)malloc(sizeof(tsd_t));
value->arg = (char *)arg;
value->id = pthread_self();
pthread_setspecific(thread_key, value);
printf("%s setspecific %p\n", (char*)arg, value);
value = (struct tsd_t*)pthread_getspecific(thread_key);
printf("tid = 0x%x str = %s\n", (int)value->id, value->arg);
sleep(2);
value = (struct tsd_t*)pthread_getspecific(thread_key);
printf("tid = 0x%x str = %s\n", (int)value->id, value->arg);
return NULL;
}
int main(int argc, char** argv) {
//pthread_key_create(&thread_key, destr_function);
pthread_t thread1;
pthread_t thread2;
pthread_create(&thread1, NULL, start_routine, (char *)"thread1");
pthread_create(&thread2, NULL, start_routine, (char *)"thread2");
pthread_join(thread1, NULL);
pthread_join(thread2, NULL);
return 0;
}