mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/* Test for open_memstream locking.
|
|
Copyright (C) 2017-2019 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* This test checks if concurrent writes to a FILE created with
|
|
open_memstream are correctly interleaved without loss or corruption
|
|
of data. Large number of concurrent fputc operations are used
|
|
and in the end the bytes written to the memstream buffer are
|
|
counted to see if they all got recorded.
|
|
|
|
This is a regression test to see if the single threaded stdio
|
|
optimization broke multi-threaded open_memstream usage. */
|
|
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <support/check.h>
|
|
#include <support/xthread.h>
|
|
|
|
enum
|
|
{
|
|
thread_count = 2,
|
|
byte_count = 1000000,
|
|
};
|
|
|
|
struct closure
|
|
{
|
|
FILE *fp;
|
|
char b;
|
|
};
|
|
|
|
static void *
|
|
thread_func (void *closure)
|
|
{
|
|
struct closure *args = closure;
|
|
|
|
for (int i = 0; i < byte_count; ++i)
|
|
fputc (args->b, args->fp);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
do_test (void)
|
|
{
|
|
char *buffer = NULL;
|
|
size_t buffer_length = 0;
|
|
FILE *fp = open_memstream (&buffer, &buffer_length);
|
|
if (fp == NULL)
|
|
FAIL_RET ("open_memstream: %m");
|
|
|
|
pthread_t threads[thread_count];
|
|
struct closure args[thread_count];
|
|
|
|
for (int i = 0; i < thread_count; ++i)
|
|
{
|
|
args[i].fp = fp;
|
|
args[i].b = 'A' + i;
|
|
threads[i] = xpthread_create (NULL, thread_func, args + i);
|
|
}
|
|
|
|
for (int i = 0; i < thread_count; ++i)
|
|
xpthread_join (threads[i]);
|
|
|
|
fclose (fp);
|
|
|
|
if (buffer_length != thread_count * byte_count)
|
|
FAIL_RET ("unexpected number of written bytes: %zu (should be %d)",
|
|
buffer_length, thread_count * byte_count);
|
|
|
|
/* Verify that each thread written its unique character byte_count times. */
|
|
size_t counts[thread_count] = { 0, };
|
|
for (size_t i = 0; i < buffer_length; ++i)
|
|
{
|
|
if (buffer[i] < 'A' || buffer[i] >= 'A' + thread_count)
|
|
FAIL_RET ("written byte at %zu out of range: %d", i, buffer[i] & 0xFF);
|
|
++counts[buffer[i] - 'A'];
|
|
}
|
|
for (int i = 0; i < thread_count; ++i)
|
|
if (counts[i] != byte_count)
|
|
FAIL_RET ("incorrect write count for thread %d: %zu (should be %d)", i,
|
|
counts[i], byte_count);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TIMEOUT 100
|
|
#include <support/test-driver.c>
|