00001 /* ///////////////////////////////////////////////////////////////////////// 00002 * File: stlsoft/error/errno_scope.hpp (originally MLTErrScp.h, ::SynesisStd) 00003 * 00004 * Purpose: errno scoping class. 00005 * 00006 * Created: 28th November 1998 00007 * Updated: 10th August 2009 00008 * 00009 * Home: http://stlsoft.org/ 00010 * 00011 * Copyright (c) 1998-2009, Matthew Wilson and Synesis Software 00012 * All rights reserved. 00013 * 00014 * Redistribution and use in source and binary forms, with or without 00015 * modification, are permitted provided that the following conditions are met: 00016 * 00017 * - Redistributions of source code must retain the above copyright notice, this 00018 * list of conditions and the following disclaimer. 00019 * - Redistributions in binary form must reproduce the above copyright notice, 00020 * this list of conditions and the following disclaimer in the documentation 00021 * and/or other materials provided with the distribution. 00022 * - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of 00023 * any contributors may be used to endorse or promote products derived from 00024 * this software without specific prior written permission. 00025 * 00026 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00027 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00028 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00029 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00030 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00031 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00032 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00033 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00034 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00035 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00036 * POSSIBILITY OF SUCH DAMAGE. 00037 * 00038 * ////////////////////////////////////////////////////////////////////// */ 00039 00040 00047 #ifndef STLSOFT_INCL_STLSOFT_ERROR_HPP_ERRNO_SCOPE 00048 #define STLSOFT_INCL_STLSOFT_ERROR_HPP_ERRNO_SCOPE 00049 00050 #ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION 00051 # define STLSOFT_VER_STLSOFT_ERROR_HPP_ERRNO_SCOPE_MAJOR 3 00052 # define STLSOFT_VER_STLSOFT_ERROR_HPP_ERRNO_SCOPE_MINOR 0 00053 # define STLSOFT_VER_STLSOFT_ERROR_HPP_ERRNO_SCOPE_REVISION 3 00054 # define STLSOFT_VER_STLSOFT_ERROR_HPP_ERRNO_SCOPE_EDIT 40 00055 #endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */ 00056 00057 /* ///////////////////////////////////////////////////////////////////////// 00058 * Compatibility 00059 */ 00060 00061 /* 00062 [DocumentationStatus:Ready] 00063 */ 00064 00065 /* ///////////////////////////////////////////////////////////////////////// 00066 * Includes 00067 */ 00068 00069 #ifndef STLSOFT_INCL_STLSOFT_H_STLSOFT 00070 # include <stlsoft/stlsoft.h> 00071 #endif /* !STLSOFT_INCL_STLSOFT_H_STLSOFT */ 00072 00073 #ifndef STLSOFT_INCL_H_ERRNO 00074 # define STLSOFT_INCL_H_ERRNO 00075 # include <errno.h> 00076 #endif /* !STLSOFT_INCL_H_ERRNO */ 00077 00078 /* ///////////////////////////////////////////////////////////////////////// 00079 * Namespace 00080 */ 00081 00082 #ifndef _STLSOFT_NO_NAMESPACE 00083 namespace stlsoft 00084 { 00085 #endif /* !_STLSOFT_NO_NAMESPACE */ 00086 00087 /* ///////////////////////////////////////////////////////////////////////// 00088 * Classes 00089 */ 00090 00110 class errno_scope 00111 { 00112 public: 00113 typedef errno_scope class_type; 00114 00117 public: 00119 errno_scope() stlsoft_throw_0() 00120 : m_errno(errno) 00121 {} 00123 ss_explicit_k errno_scope(int errno_) stlsoft_throw_0() 00124 : m_errno(errno_) 00125 { 00126 errno = m_errno; 00127 } 00129 ~errno_scope() stlsoft_throw_0() 00130 { 00131 errno = m_errno; 00132 } 00133 00135 00138 public: 00140 operator int () const 00141 { 00142 return m_errno; 00143 } 00144 00146 00149 private: 00150 int m_errno; 00152 00155 private: 00156 errno_scope(errno_scope const&); 00157 errno_scope& operator =(errno_scope const&); 00159 }; 00160 00161 /* ////////////////////////////////////////////////////////////////////// */ 00162 00163 #ifndef _STLSOFT_NO_NAMESPACE 00164 } // namespace stlsoft 00165 #endif /* !_STLSOFT_NO_NAMESPACE */ 00166 00167 /* ////////////////////////////////////////////////////////////////////// */ 00168 00169 #endif /* !STLSOFT_INCL_STLSOFT_ERROR_HPP_ERRNO_SCOPE */ 00170 00171 /* ///////////////////////////// end of file //////////////////////////// */