// commit 12e1e324683a1d381b7f15dd36c99b37dd44d940 2015-04-10
// robust mutex should work with detached threads too
#include <pthread.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include "test.h"

#define TX(r,f,x) ( ((r)=(f))==x || \
 (t_error(#f" failed: (pshared==%d) got %d \"%s\" want %d \"%s\"\n", pshared, r, strerror(r), x, strerror(x)), 0) )
#define T(r,f) TX(r,f,0)

static pthread_barrier_t barrier2;
static int pshared;

static void *start_lock(void *arg)
{
	pthread_mutex_lock(arg);
	pthread_barrier_wait(&barrier2);
	return 0;
}

static void f()
{
	pthread_t td;
	int r;
	pthread_mutexattr_t mtx_a;
	pthread_mutex_t mtx;
	struct timespec ts;

	T(r, pthread_barrier_init(&barrier2, 0, 2));
	T(r, pthread_mutexattr_init(&mtx_a));
	T(r, pthread_mutexattr_setrobust(&mtx_a, PTHREAD_MUTEX_ROBUST));
	if (pshared)
		T(r, pthread_mutexattr_setpshared(&mtx_a, PTHREAD_PROCESS_SHARED));
	T(r, pthread_mutex_init(&mtx, &mtx_a));
	T(r, pthread_create(&td, 0, start_lock, &mtx));
	T(r, pthread_detach(td));
	pthread_barrier_wait(&barrier2);
	pthread_barrier_destroy(&barrier2);

	// enough time to ensure that the detached thread is dead
	clock_gettime(CLOCK_REALTIME, &ts);
	ts.tv_nsec += 100*1000*1000;
	if (ts.tv_nsec >= 1000*1000*1000) {
		ts.tv_sec++;
		ts.tv_nsec -= 1000*1000*1000;
	}

	TX(r, pthread_mutex_timedlock(&mtx, &ts), EOWNERDEAD);
}

int main(void)
{
	// test non-pshared and pshared robust mutexes as well
	f();
	pshared = 1;
	f();
	return t_status;
}