From b41f74438672dd682bc01ae818cb3da654f22c1e Mon Sep 17 00:00:00 2001 From: marha Date: Wed, 13 Feb 2013 10:41:10 +0100 Subject: Updated to latest CVS version of pthreads --- pthreads/errno.c | 200 +++++++++++++++++++++++++++++-------------------------- 1 file changed, 106 insertions(+), 94 deletions(-) (limited to 'pthreads/errno.c') diff --git a/pthreads/errno.c b/pthreads/errno.c index 2f8a317f0..fc61a889c 100644 --- a/pthreads/errno.c +++ b/pthreads/errno.c @@ -1,94 +1,106 @@ -/* - * errno.c - * - * Description: - * This translation unit implements routines associated with spawning a new - * thread. - * - * -------------------------------------------------------------------------- - * - * Pthreads-win32 - POSIX Threads Library for Win32 - * Copyright(C) 1998 John E. Bossom - * Copyright(C) 1999,2005 Pthreads-win32 contributors - * - * Contact Email: rpj@callisto.canberra.edu.au - * - * The current list of contributors is contained - * in the file CONTRIBUTORS included with the source - * code distribution. The list can also be seen at the - * following World Wide Web location: - * http://sources.redhat.com/pthreads-win32/contributors.html - * - * This 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 of the License, or (at your option) any later version. - * - * This 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 this library in the file COPYING.LIB; - * if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - */ - -#if defined(NEED_ERRNO) - -#include "pthread.h" -#include "implement.h" - -static int reallyBad = ENOMEM; - -/* - * Re-entrant errno. - * - * Each thread has it's own errno variable in pthread_t. - * - * The benefit of using the pthread_t structure - * instead of another TSD key is TSD keys are limited - * on Win32 to 64 per process. Secondly, to implement - * it properly without using pthread_t you'd need - * to dynamically allocate an int on starting the thread - * and store it manually into TLS and then ensure that you free - * it on thread termination. We get all that for free - * by simply storing the errno on the pthread_t structure. - * - * MSVC and Mingw32 already have their own thread-safe errno. - * - * #if defined( _REENTRANT ) || defined( _MT ) - * #define errno *_errno() - * - * int *_errno( void ); - * #else - * extern int errno; - * #endif - * - */ - -int * -_errno (void) -{ - pthread_t self; - int *result; - - if ((self = pthread_self ()).p == NULL) - { - /* - * Yikes! unable to allocate a thread! - * Throw an exception? return an error? - */ - result = &reallyBad; - } - else - { - result = (int *)(&self.p->exitStatus); - } - - return (result); - -} /* _errno */ - -#endif /* (NEED_ERRNO) */ +/* + * errno.c + * + * Description: + * This translation unit implements routines associated with spawning a new + * thread. + * + * -------------------------------------------------------------------------- + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright(C) 1998 John E. Bossom + * Copyright(C) 1999,2012 Pthreads-win32 contributors + * + * Homepage1: http://sourceware.org/pthreads-win32/ + * Homepage2: http://sourceforge.net/projects/pthreads4w/ + * + * The current list of contributors is contained + * in the file CONTRIBUTORS included with the source + * code distribution. The list can also be seen at the + * following World Wide Web location: + * http://sources.redhat.com/pthreads-win32/contributors.html + * + * This 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 of the License, or (at your option) any later version. + * + * This 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 this library in the file COPYING.LIB; + * if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#if defined(NEED_ERRNO) + +#include "pthread.h" +#include "implement.h" + +static int reallyBad = ENOMEM; + +/* + * Re-entrant errno. + * + * Each thread has it's own errno variable in pthread_t. + * + * The benefit of using the pthread_t structure + * instead of another TSD key is TSD keys are limited + * on Win32 to 64 per process. Secondly, to implement + * it properly without using pthread_t you'd need + * to dynamically allocate an int on starting the thread + * and store it manually into TLS and then ensure that you free + * it on thread termination. We get all that for free + * by simply storing the errno on the pthread_t structure. + * + * MSVC and Mingw32 already have their own thread-safe errno. + * + * #if defined( _REENTRANT ) || defined( _MT ) + * #define errno *_errno() + * + * int *_errno( void ); + * #else + * extern int errno; + * #endif + * + */ + +int * +_errno (void) +{ + pthread_t self; + int *result; + + if ((self = pthread_self ()).p == NULL) + { + /* + * Yikes! unable to allocate a thread! + * Throw an exception? return an error? + */ + result = &reallyBad; + } + else + { + result = (int *)(&self.p->exitStatus); + } + + return (result); + +} /* _errno */ + +#endif /* (NEED_ERRNO) */ + +#if ! defined(PTW32_BUILD_INLINED) +/* + * Avoid "translation unit is empty" warnings + */ +typedef int foo; +#endif -- cgit v1.2.3