98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/* Common definition for tst-cancel4_* tests.
|
|
|
|
Copyright (C) 2016-2017 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/>. */
|
|
|
|
#include <pthread.h>
|
|
|
|
#include <support/check.h>
|
|
#include <support/xthread.h>
|
|
#include <support/xunistd.h>
|
|
|
|
/* Pipe descriptors. */
|
|
static int fds[2];
|
|
|
|
/* Temporary file descriptor, to be closed after each round. */
|
|
static int tempfd = -1;
|
|
static int tempfd2 = -1;
|
|
/* Name of temporary file to be removed after each round. */
|
|
static char *tempfname;
|
|
/* Temporary message queue. */
|
|
static int tempmsg = -1;
|
|
|
|
/* Often used barrier for two threads. */
|
|
static pthread_barrier_t b2;
|
|
|
|
/* The WRITE_BUFFER_SIZE value needs to be chosen such that if we set
|
|
the socket send buffer size to '1', a write of this size on that
|
|
socket will block.
|
|
|
|
The Linux kernel imposes a minimum send socket buffer size which
|
|
has changed over the years. As of Linux 3.10 the value is:
|
|
|
|
2 * (2048 + SKB_DATA_ALIGN(sizeof(struct sk_buff)))
|
|
|
|
which is attempting to make sure that with standard MTUs,
|
|
TCP can always queue up at least 2 full sized packets.
|
|
|
|
Furthermore, there is logic in the socket send paths that
|
|
will allow one more packet (of any size) to be queued up as
|
|
long as some socket buffer space remains. Blocking only
|
|
occurs when we try to queue up a new packet and the send
|
|
buffer space has already been fully consumed.
|
|
|
|
Therefore we must set this value to the largest possible value of
|
|
the formula above (and since it depends upon the size of "struct
|
|
sk_buff", it is dependent upon machine word size etc.) plus some
|
|
slack space. */
|
|
|
|
#define WRITE_BUFFER_SIZE 16384
|
|
|
|
/* Cleanup handling test. */
|
|
static int cl_called;
|
|
|
|
static void
|
|
cl (void *arg)
|
|
{
|
|
++cl_called;
|
|
}
|
|
|
|
/* Named pipe used to check for blocking open. It should be closed
|
|
after the cancellation handling. */
|
|
static char fifoname[] = "/tmp/tst-cancel4-fifo-XXXXXX";
|
|
static int fifofd;
|
|
|
|
static void
|
|
__attribute__ ((used))
|
|
cl_fifo (void *arg)
|
|
{
|
|
++cl_called;
|
|
|
|
unlink (fifoname);
|
|
close (fifofd);
|
|
fifofd = -1;
|
|
}
|
|
|
|
struct cancel_tests
|
|
{
|
|
const char *name;
|
|
void *(*tf) (void *);
|
|
int nb;
|
|
int only_early;
|
|
};
|
|
#define ADD_TEST(name, nbar, early) { #name, tf_##name, nbar, early }
|