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1bc541f213
Original commit message from CVS: The core code from pth has been taken out and included in gstreamer. This code is documented, more or less, in http://www-124.ibm.com/pthreads/docs/rse-pmt.ps. This code is designed to replace cothreads.[ch], eventually.
56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
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** GNU Pth - The GNU Portable Threads
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** Copyright (c) 1999-2001 Ralf S. Engelschall <rse@engelschall.com>
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**
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** This file is part of GNU Pth, a non-preemptive thread scheduling
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** library which can be found at http://www.gnu.org/software/pth/.
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**
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** This library is free software; you can redistribute it and/or
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** modify it under the terms of the GNU Lesser General Public
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** License as published by the Free Software Foundation; either
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** version 2.1 of the License, or (at your option) any later version.
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**
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** This library is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public
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** License along with this library; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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** USA, or contact Ralf S. Engelschall <rse@engelschall.com>.
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**
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** pth_errno.c: Pth errno support
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*/
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/* Steinbach's Guideline for Systems Programming:
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``Never test for an error condition
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you don't know how to handle.'' */
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#include "pth_p.h"
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#if cpp
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/* enclose errno in a block */
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#define errno_shield \
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for ( pth_errno_storage = errno, \
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pth_errno_flag = TRUE; \
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pth_errno_flag; \
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errno = pth_errno_storage, \
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pth_errno_flag = FALSE )
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/* return plus setting an errno value */
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#if defined(PTH_DEBUG)
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#define return_errno(return_val,errno_val) \
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do { errno = (errno_val); \
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pth_debug4("return 0x%lx with errno %d(\"%s\")", \
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(unsigned long)(return_val), (errno), strerror((errno))); \
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return (return_val); } while (0)
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#else
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#define return_errno(return_val,errno_val) \
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do { errno = (errno_val); return (return_val); } while (0)
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#endif
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#endif /* cpp */
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intern int pth_errno_storage = 0;
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intern int pth_errno_flag = 0;
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