5592798865
Result of running 'hg m5style --skip-all --fix-control -a'.
69 lines
3 KiB
C++
69 lines
3 KiB
C++
/*
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* Copyright (c) 2008 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Nathan Binkert
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*/
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#ifndef __BASE_ATOMICIO_HH__
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#define __BASE_ATOMICIO_HH__
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#include <unistd.h>
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// These functions keep reading/writing, if possible, until all data
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// has been transferred. Basically, try again when there's no error,
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// but there is data left also retry on EINTR.
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// This function blocks until it is done.
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ssize_t atomic_read(int fd, void *s, size_t n);
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ssize_t atomic_write(int fd, const void *s, size_t n);
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/**
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* Statically allocate a string and write it to a file descriptor.
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*
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* @warning The return value will from atomic_write will be ignored
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* which means that errors will be ignored. This is normally fine as
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* this macro is intended to be used in fatal signal handlers where
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* error handling might not be feasible.
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*/
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#define STATIC_MSG(fd, m) \
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do { \
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static const char msg[] = m; \
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atomic_write(fd, msg, sizeof(msg) - 1); \
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} while (0)
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/**
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* Statically allocate a string and write it to STDERR.
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*
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* @warning The return value will from atomic_write will be ignored
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* which means that errors will be ignored. This is normally fine as
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* this macro is intended to be used in fatal signal handlers where
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* error handling might not be feasible.
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*/
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#define STATIC_ERR(m) STATIC_MSG(STDERR_FILENO, m)
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#endif // __BASE_ATOMICIO_HH__
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