Re: [PATCH glibc-2.44] Fix __pthread_timedblock for hurd

One thing that is a bug, however, is the program below, which stays
blocked because the mach_msg calling loop keeps using the same timeout.

We probably need a version that takes a clock_id and an absolute time,
and does the clock_gettime call itself on each mach_msg calling loop.

Samuel

#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <pthread.h>

void handle(int sig) {
	printf("handle\n");
}

int main(void) {
	pthread_cond_t cond;
	pthread_condattr_t condattr;
	pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
	struct timespec abstime;

	signal(SIGALRM, handle);
	struct itimerval timer = {
		.it_interval = {1, 0},
		.it_value = {1, 0},
	};
	setitimer(ITIMER_REAL, &timer, NULL);

	pthread_condattr_init(&condattr);
	pthread_condattr_setclock(&condattr, CLOCK_MONOTONIC);
	pthread_cond_init(&cond, &condattr);

	pthread_mutex_lock(&mutex);
	clock_gettime(CLOCK_MONOTONIC, &abstime);
	abstime.tv_sec += 5;
	printf("waiting\n");
	pthread_cond_timedwait(&cond, &mutex, &abstime);
	printf("waited\n");
	pthread_mutex_unlock(&mutex);
	return 0;
}