mirror of
git://git.gnupg.org/gnupg.git
synced 2024-11-04 20:38:50 +01:00
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
|
/* Multithreading primitives.
|
||
|
|
Copyright (C) 2005-2009 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or modify it
|
||
|
|
under the terms of the GNU Library General Public License as published
|
||
|
|
by the Free Software Foundation; either version 2, or (at your option)
|
||
|
|
any later version.
|
||
|
|
|
||
|
|
This program 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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with this program; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
|
||
|
|
USA. */
|
||
|
|
|
||
|
|
/* Written by Bruno Haible <bruno@clisp.org>, 2005. */
|
||
|
|
|
||
|
|
#include <config.h>
|
||
|
|
|
||
|
|
/* ========================================================================= */
|
||
|
|
|
||
|
|
#if USE_POSIX_THREADS
|
||
|
|
|
||
|
|
/* Use the POSIX threads library. */
|
||
|
|
|
||
|
|
# include <pthread.h>
|
||
|
|
# include <stdlib.h>
|
||
|
|
|
||
|
|
# if PTHREAD_IN_USE_DETECTION_HARD
|
||
|
|
|
||
|
|
/* The function to be executed by a dummy thread. */
|
||
|
|
static void *
|
||
|
|
dummy_thread_func (void *arg)
|
||
|
|
{
|
||
|
|
return arg;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
glthread_in_use (void)
|
||
|
|
{
|
||
|
|
static int tested;
|
||
|
|
static int result; /* 1: linked with -lpthread, 0: only with libc */
|
||
|
|
|
||
|
|
if (!tested)
|
||
|
|
{
|
||
|
|
pthread_t thread;
|
||
|
|
|
||
|
|
if (pthread_create (&thread, NULL, dummy_thread_func, NULL) != 0)
|
||
|
|
/* Thread creation failed. */
|
||
|
|
result = 0;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* Thread creation works. */
|
||
|
|
void *retval;
|
||
|
|
if (pthread_join (thread, &retval) != 0)
|
||
|
|
abort ();
|
||
|
|
result = 1;
|
||
|
|
}
|
||
|
|
tested = 1;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
# endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* ========================================================================= */
|
||
|
|
|
||
|
|
/* This declaration is solely to ensure that after preprocessing
|
||
|
|
this file is never empty. */
|
||
|
|
typedef int dummy;
|