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134 lines
2.8 KiB
C++
134 lines
2.8 KiB
C++
//
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// PipeImpl_POSIX.cpp
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//
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// $Id: //poco/1.4/Foundation/src/PipeImpl_POSIX.cpp#1 $
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//
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// Library: Foundation
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// Package: Processes
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// Module: PipeImpl
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/PipeImpl_POSIX.h"
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#include "Poco/Exception.h"
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#include <sys/types.h>
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#include <unistd.h>
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#include <errno.h>
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namespace Poco {
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PipeImpl::PipeImpl()
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{
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int fds[2];
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int rc = pipe(fds);
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if (rc == 0)
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{
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_readfd = fds[0];
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_writefd = fds[1];
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}
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else throw CreateFileException("anonymous pipe");
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}
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PipeImpl::~PipeImpl()
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{
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closeRead();
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closeWrite();
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}
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int PipeImpl::writeBytes(const void* buffer, int length)
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{
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poco_assert (_writefd != -1);
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int n;
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do
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{
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n = write(_writefd, buffer, length);
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}
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while (n < 0 && errno == EINTR);
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if (n >= 0)
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return n;
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else
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throw WriteFileException("anonymous pipe");
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}
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int PipeImpl::readBytes(void* buffer, int length)
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{
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poco_assert (_readfd != -1);
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int n;
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do
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{
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n = read(_readfd, buffer, length);
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}
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while (n < 0 && errno == EINTR);
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if (n >= 0)
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return n;
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else
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throw ReadFileException("anonymous pipe");
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}
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PipeImpl::Handle PipeImpl::readHandle() const
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{
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return _readfd;
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}
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PipeImpl::Handle PipeImpl::writeHandle() const
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{
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return _writefd;
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}
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void PipeImpl::closeRead()
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{
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if (_readfd != -1)
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{
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close(_readfd);
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_readfd = -1;
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}
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}
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void PipeImpl::closeWrite()
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{
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if (_writefd != -1)
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{
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close(_writefd);
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_writefd = -1;
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}
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}
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} // namespace Poco
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