137 lines
2.9 KiB
C
137 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright Collabora Ltd., 2021
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*
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* futex cmp requeue test by André Almeida <andrealmeid@collabora.com>
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*/
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#include <pthread.h>
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#include <limits.h>
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#include "logging.h"
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#include "futextest.h"
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#define TEST_NAME "futex-requeue"
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#define timeout_ns 30000000
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#define WAKE_WAIT_US 10000
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volatile futex_t *f1;
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void usage(char *prog)
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{
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printf("Usage: %s\n", prog);
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printf(" -c Use color\n");
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printf(" -h Display this help message\n");
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printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
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VQUIET, VCRITICAL, VINFO);
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}
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void *waiterfn(void *arg)
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{
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struct timespec to;
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to.tv_sec = 0;
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to.tv_nsec = timeout_ns;
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if (futex_wait(f1, *f1, &to, 0))
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printf("waiter failed errno %d\n", errno);
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return NULL;
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}
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int main(int argc, char *argv[])
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{
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pthread_t waiter[10];
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int res, ret = RET_PASS;
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int c, i;
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volatile futex_t _f1 = 0;
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volatile futex_t f2 = 0;
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f1 = &_f1;
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while ((c = getopt(argc, argv, "cht:v:")) != -1) {
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switch (c) {
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case 'c':
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log_color(1);
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break;
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case 'h':
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usage(basename(argv[0]));
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exit(0);
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case 'v':
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log_verbosity(atoi(optarg));
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break;
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default:
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usage(basename(argv[0]));
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exit(1);
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}
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}
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ksft_print_header();
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ksft_set_plan(2);
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ksft_print_msg("%s: Test futex_requeue\n",
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basename(argv[0]));
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/*
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* Requeue a waiter from f1 to f2, and wake f2.
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*/
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if (pthread_create(&waiter[0], NULL, waiterfn, NULL))
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error("pthread_create failed\n", errno);
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usleep(WAKE_WAIT_US);
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info("Requeuing 1 futex from f1 to f2\n");
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res = futex_cmp_requeue(f1, 0, &f2, 0, 1, 0);
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if (res != 1) {
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ksft_test_result_fail("futex_requeue simple returned: %d %s\n",
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res ? errno : res,
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res ? strerror(errno) : "");
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ret = RET_FAIL;
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}
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info("Waking 1 futex at f2\n");
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res = futex_wake(&f2, 1, 0);
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if (res != 1) {
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ksft_test_result_fail("futex_requeue simple returned: %d %s\n",
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res ? errno : res,
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res ? strerror(errno) : "");
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ret = RET_FAIL;
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} else {
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ksft_test_result_pass("futex_requeue simple succeeds\n");
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}
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/*
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* Create 10 waiters at f1. At futex_requeue, wake 3 and requeue 7.
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* At futex_wake, wake INT_MAX (should be exactly 7).
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*/
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for (i = 0; i < 10; i++) {
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if (pthread_create(&waiter[i], NULL, waiterfn, NULL))
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error("pthread_create failed\n", errno);
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}
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usleep(WAKE_WAIT_US);
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info("Waking 3 futexes at f1 and requeuing 7 futexes from f1 to f2\n");
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res = futex_cmp_requeue(f1, 0, &f2, 3, 7, 0);
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if (res != 10) {
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ksft_test_result_fail("futex_requeue many returned: %d %s\n",
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res ? errno : res,
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res ? strerror(errno) : "");
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ret = RET_FAIL;
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}
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info("Waking INT_MAX futexes at f2\n");
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res = futex_wake(&f2, INT_MAX, 0);
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if (res != 7) {
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ksft_test_result_fail("futex_requeue many returned: %d %s\n",
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res ? errno : res,
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res ? strerror(errno) : "");
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ret = RET_FAIL;
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} else {
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ksft_test_result_pass("futex_requeue many succeeds\n");
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}
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ksft_print_cnts();
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return ret;
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}
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