106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
/*
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* Copyright (C) 2015 Cyril Hrubis <chrubis@suse.cz>
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*
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* Licensed under the GNU GPLv2 or later.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Block on a futex and wait for wakeup.
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*
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* This tests uses shared memory page to store the mutex variable.
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*/
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#include <sys/mman.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include "test.h"
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#include "safe_macros.h"
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#include "futextest.h"
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const char *TCID="futex_wait02";
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const int TST_TOTAL=1;
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static futex_t *futex;
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static void do_child(void)
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{
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int ret;
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tst_process_state_wait2(getppid(), 'S');
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ret = futex_wake(futex, 1, 0);
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if (ret != 1)
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tst_brkm(TFAIL, NULL, "futex_wake() returned %i", ret);
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exit(TPASS);
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}
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static void verify_futex_wait(void)
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{
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int res;
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int pid;
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pid = tst_fork();
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switch (pid) {
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case 0:
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do_child();
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break;
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case -1:
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tst_brkm(TBROK | TERRNO, NULL, "fork() failed");
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break;
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default:
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break;
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}
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res = futex_wait(futex, *futex, NULL, 0);
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if (res) {
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tst_resm(TFAIL, "futex_wait() returned %i, errno %s",
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res, tst_strerrno(errno));
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}
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SAFE_WAIT(NULL, &res);
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if (WIFEXITED(res) && WEXITSTATUS(res) == TPASS)
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tst_resm(TPASS, "futex_wait() woken up");
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else
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tst_resm(TFAIL, "child failed");
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}
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static void setup(void)
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{
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futex = SAFE_MMAP(NULL, NULL, sizeof(*futex), PROT_READ | PROT_WRITE,
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MAP_ANONYMOUS | MAP_SHARED, -1, 0);
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*futex = FUTEX_INITIALIZER;
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}
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int main(int argc, char *argv[])
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{
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int lc;
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tst_parse_opts(argc, argv, NULL, NULL);
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++)
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verify_futex_wait();
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tst_exit();
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}
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