fd_holder.hh

00001 /* vim: set sw=4 sts=4 et foldmethod=syntax : */
00002 
00003 /*
00004  * Copyright (c) 2006 Ciaran McCreesh
00005  *
00006  * This file is part of the Paludis package manager. Paludis is free software;
00007  * you can redistribute it and/or modify it under the terms of the GNU General
00008  * Public License version 2, as published by the Free Software Foundation.
00009  *
00010  * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
00011  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00012  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
00013  * details.
00014  *
00015  * You should have received a copy of the GNU General Public License along with
00016  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00017  * Place, Suite 330, Boston, MA  02111-1307  USA
00018  */
00019 
00020 #ifndef PALUDIS_GUARD_PALUDIS_FD_HOLDER_HH
00021 #define PALUDIS_GUARD_PALUDIS_FD_HOLDER_HH 1
00022 
00023 #include <unistd.h>
00024 
00025 namespace paludis
00026 {
00027     /**
00028      * RAII holder for a file descriptor.
00029      */
00030     class PALUDIS_VISIBLE FDHolder
00031     {
00032         private:
00033             const int _fd;
00034             const bool _sync;
00035 
00036         public:
00037             ///\name Basic operations
00038             ///\{
00039 
00040             FDHolder(const int fd, bool sync = true) :
00041                 _fd(fd),
00042                 _sync(sync)
00043             {
00044             }
00045 
00046             ~FDHolder()
00047             {
00048                 if (-1 != _fd)
00049                 {
00050                     if (_sync)
00051                         ::fsync(_fd);
00052                     ::close(_fd);
00053                 }
00054             }
00055 
00056             ///\}
00057 
00058             /**
00059              * Fetch our file descriptor.
00060              */
00061             operator int () const
00062             {
00063                 return _fd;
00064             }
00065     };
00066 }
00067 
00068 #endif

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