74 lines
1.3 KiB
C
74 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright Collabora Ltd., 2021
|
|
*
|
|
* futex cmp requeue test by André Almeida <andrealmeid@collabora.com>
|
|
*/
|
|
|
|
#include <pthread.h>
|
|
#include <limits.h>
|
|
|
|
#include "futextest.h"
|
|
#include "kselftest_harness.h"
|
|
|
|
#define timeout_ns 30000000
|
|
#define WAKE_WAIT_US 10000
|
|
|
|
volatile futex_t *f1;
|
|
|
|
void *waiterfn(void *arg)
|
|
{
|
|
struct timespec to;
|
|
|
|
to.tv_sec = 0;
|
|
to.tv_nsec = timeout_ns;
|
|
|
|
if (futex_wait(f1, *f1, &to, 0))
|
|
printf("waiter failed errno %d\n", errno);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
TEST(requeue_single)
|
|
{
|
|
volatile futex_t _f1 = 0;
|
|
volatile futex_t f2 = 0;
|
|
pthread_t waiter[10];
|
|
|
|
f1 = &_f1;
|
|
|
|
/*
|
|
* Requeue a waiter from f1 to f2, and wake f2.
|
|
*/
|
|
ASSERT_EQ(0, pthread_create(&waiter[0], NULL, waiterfn, NULL));
|
|
|
|
usleep(WAKE_WAIT_US);
|
|
|
|
EXPECT_EQ(1, futex_cmp_requeue(f1, 0, &f2, 0, 1, 0));
|
|
EXPECT_EQ(1, futex_wake(&f2, 1, 0));
|
|
}
|
|
|
|
TEST(requeue_multiple)
|
|
{
|
|
volatile futex_t _f1 = 0;
|
|
volatile futex_t f2 = 0;
|
|
pthread_t waiter[10];
|
|
int i;
|
|
|
|
f1 = &_f1;
|
|
|
|
/*
|
|
* Create 10 waiters at f1. At futex_requeue, wake 3 and requeue 7.
|
|
* At futex_wake, wake INT_MAX (should be exactly 7).
|
|
*/
|
|
for (i = 0; i < 10; i++)
|
|
ASSERT_EQ(0, pthread_create(&waiter[i], NULL, waiterfn, NULL));
|
|
|
|
usleep(WAKE_WAIT_US);
|
|
|
|
EXPECT_EQ(10, futex_cmp_requeue(f1, 0, &f2, 3, 7, 0));
|
|
EXPECT_EQ(7, futex_wake(&f2, INT_MAX, 0));
|
|
}
|
|
|
|
TEST_HARNESS_MAIN
|