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;
}
