glibc/nptl/vars.c
Siddhesh Poyarekar 439bf404b8 Allow a single-threaded program to cancel itself
There is nothing in the POSIX specification to disallow a
single-threaded program from cancelling itself, so we forcibly enable
multiple_threads to allow the next available cancellation point in the
thread to run.

Also added additional tests to cover various cancellation scenarios.
2012-05-15 09:41:57 +05:30

45 lines
1.5 KiB
C

/* Copyright (C) 2004 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 <pthreadP.h>
#include <stdlib.h>
#include <tls.h>
#include <unistd.h>
/* Default stack size. */
size_t __default_stacksize attribute_hidden
#ifdef SHARED
;
#else
= PTHREAD_STACK_MIN;
#endif
/* Flag whether the machine is SMP or not. */
int __is_smp attribute_hidden;
#ifndef TLS_MULTIPLE_THREADS_IN_TCB
/* Variable set to a nonzero value either if more than one thread runs or ran,
or if a single-threaded process is trying to cancel itself. See
nptl/descr.h for more context on the single-threaded process case. */
int __pthread_multiple_threads attribute_hidden;
#endif
/* Table of the key information. */
struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX]
__attribute__ ((nocommon));
hidden_data_def (__pthread_keys)