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| //===-- main.c --------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
char *pointer;
void *nothing(void *p) {
return NULL;
}
void *f1(void *p) {
pointer[0] = 'x';
sleep(100);
return NULL;
}
void *f2(void *p) {
pointer[0] = 'y';
sleep(100);
return NULL;
}
int main (int argc, char const *argv[])
{
pointer = (char *)malloc(10);
for (int i = 0; i < 3; i++) {
pthread_t t;
pthread_create(&t, NULL, nothing, NULL);
pthread_join(t, NULL);
}
pthread_t t1;
pthread_create(&t1, NULL, f1, NULL);
for (int i = 0; i < 3; i++) {
pthread_t t;
pthread_create(&t, NULL, nothing, NULL);
pthread_join(t, NULL);
}
pthread_t t2;
pthread_create(&t2, NULL, f2, NULL);
pthread_join(t1, NULL);
pthread_join(t2, NULL);
return 0;
}
|