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/* Test getenv with concurrent unsetenv.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xthread.h>
/* Used to synchronize the start of each test iteration. */
static pthread_barrier_t barrier;
/* Number of iterations. */
enum { iterations = 10000 };
/* Check that even with concurrent unsetenv, a variable that is known
to be there is found. */
static void *
getenv_thread (void *ignored)
{
for (int i = 0; i < iterations; ++i)
{
xpthread_barrier_wait (&barrier);
TEST_COMPARE_STRING (getenv ("variable"), "value");
xpthread_barrier_wait (&barrier);
}
return NULL;
}
static int
do_test (void)
{
xpthread_barrier_init (&barrier, NULL, 2);
pthread_t thr = xpthread_create (NULL, getenv_thread, NULL);
char *variables[50];
for (int i = 0; i < array_length (variables); ++i)
variables[i] = xasprintf ("V%d", i);
for (int i = 0; i < iterations; ++i)
{
clearenv ();
for (int j = 0; j < array_length (variables); ++j)
TEST_COMPARE (setenv (variables[j], variables[j] + 1, 1), 0);
TEST_COMPARE (setenv ("variable", "value", 1), 0);
xpthread_barrier_wait (&barrier);
/* Test runs. */
for (int j = 0; j < array_length (variables); ++j)
TEST_COMPARE (unsetenv (variables[j]), 0);
xpthread_barrier_wait (&barrier);
}
xpthread_join (thr);
xpthread_barrier_destroy (&barrier);
for (int i = 0; i < array_length (variables); ++i)
free (variables[i]);
return 0;
}
#include <support/test-driver.c>
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