/* ** GNU Pth - The GNU Portable Threads ** Copyright (c) 1999-2001 Ralf S. Engelschall ** ** This file is part of GNU Pth, a non-preemptive thread scheduling ** library which can be found at http://www.gnu.org/software/pth/. ** ** 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 2.1 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; if not, write to the Free Software ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 ** USA, or contact Ralf S. Engelschall . ** ** pth_errno.c: Pth errno support */ /* Steinbach's Guideline for Systems Programming: ``Never test for an error condition you don't know how to handle.'' */ #include "pth_p.h" #if cpp /* enclose errno in a block */ #define errno_shield \ for ( pth_errno_storage = errno, \ pth_errno_flag = TRUE; \ pth_errno_flag; \ errno = pth_errno_storage, \ pth_errno_flag = FALSE ) /* return plus setting an errno value */ #if defined(PTH_DEBUG) #define return_errno(return_val,errno_val) \ do { errno = (errno_val); \ pth_debug4("return 0x%lx with errno %d(\"%s\")", \ (unsigned long)(return_val), (errno), strerror((errno))); \ return (return_val); } while (0) #else #define return_errno(return_val,errno_val) \ do { errno = (errno_val); return (return_val); } while (0) #endif #endif /* cpp */ intern int pth_errno_storage = 0; intern int pth_errno_flag = 0;