Hi,
I wrote a simple test for pthread_barrier_wait. it won't work as expected.
result should be
r1 = 1, r2 = 1
Thanks,
Mümin
cmake_minimum_required(VERSION 3.26)
project(test)
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
add_definitions(-D__POSIX_VISIBLE=200112 -D_POSIX_C_SOURCE=200112)
add_executable(test main.cpp)
target_link_libraries(test pthread)
#include <stdio.h>
#include <pthread.h>
int x = 0;
int y = 0;
int r1 = 0;
int r2 = 0;
pthread_barrier_t barrier;
void* thread1(void* arg) {
y = 1;
pthread_barrier_wait(&barrier); // Memory barrier
r1 = x;
return NULL;
}
void* thread2(void* arg) {
x = 1;
pthread_barrier_wait(&barrier); // Memory barrier
r2 = y;
return NULL;
}
int main() {
pthread_t t1, t2;
pthread_barrier_init(&barrier, NULL, 2);
pthread_create(&t1, NULL, thread1, NULL);
pthread_create(&t2, NULL, thread2, NULL);
pthread_join(t1, NULL);
pthread_join(t2, NULL);
printf("r1 = %d, r2 = %d\n", r1, r2);
pthread_barrier_destroy(&barrier);
return 0;
}
--
Problem reports: https://cygwin.com/problems.html
FAQ: https://cygwin.com/faq/
Documentation: https://cygwin.com/docs.html
Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple