systembuf.hpp revision 1.1.1.1.4.2
1// Copyright 2010 Google Inc. 2// All rights reserved. 3// 4// Redistribution and use in source and binary forms, with or without 5// modification, are permitted provided that the following conditions are 6// met: 7// 8// * Redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer. 10// * Redistributions in binary form must reproduce the above copyright 11// notice, this list of conditions and the following disclaimer in the 12// documentation and/or other materials provided with the distribution. 13// * Neither the name of Google Inc. nor the names of its contributors 14// may be used to endorse or promote products derived from this software 15// without specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29/// \file utils/process/systembuf.hpp 30/// Provides the utils::process::systembuf class. 31 32#if !defined(UTILS_PROCESS_SYSTEMBUF_HPP) 33#define UTILS_PROCESS_SYSTEMBUF_HPP 34 35#include <cstddef> 36#include <memory> 37#include <streambuf> 38 39#include "utils/noncopyable.hpp" 40 41namespace utils { 42namespace process { 43 44 45/// A std::streambuf implementation for raw file descriptors. 46/// 47/// This class grabs ownership of the file descriptor. I.e. when the class is 48/// destroyed, the file descriptor is closed unconditionally. 49class systembuf : public std::streambuf, noncopyable { 50 struct impl; 51 52 /// Pointer to the shared internal implementation. 53 std::auto_ptr< impl > _pimpl; 54 55protected: 56 int_type underflow(void); 57 int_type overflow(int); 58 int sync(void); 59 60public: 61 explicit systembuf(const int, std::size_t = 8192); 62 ~systembuf(void); 63}; 64 65 66} // namespace process 67} // namespace utils 68 69#endif // !defined(UTILS_PROCESS_SYSTEMBUF_HPP) 70