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[/] [w11/] [tags/] [w11a_V0.7/] [tools/] [src/] [librlink/] [RlinkPortFifo.cpp] - Rev 27
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// $Id: RlinkPortFifo.cpp 607 2014-11-30 20:02:48Z mueller $ // // Copyright 2011-2013 y Walter F.J. Mueller <W.F.J.Mueller@gsi.de> // // This program is free software; you may redistribute and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation, either version 2, or at your option any later version. // // This program is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for complete details. // // Revision History: // Date Rev Version Comment // 2013-02-23 492 1.1 use RparseUrl // 2011-03-27 374 1.0 Initial version // 2011-01-15 356 0.1 First draft // --------------------------------------------------------------------------- /*! \file \version $Id: RlinkPortFifo.cpp 607 2014-11-30 20:02:48Z mueller $ \brief Implemenation of RlinkPortFifo. */ #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <errno.h> #include "RlinkPortFifo.hpp" using namespace std; /*! \class Retro::RlinkPortFifo \brief FIXME_docs */ // all method definitions in namespace Retro namespace Retro { //------------------------------------------+----------------------------------- //! Default constructor RlinkPortFifo::RlinkPortFifo() : RlinkPort() {} //------------------------------------------+----------------------------------- //! Destructor RlinkPortFifo::~RlinkPortFifo() { // no need to call Close() here, no RlinkPortFifo::Close() // cleanup will be done by ~RlinkPort() } //------------------------------------------+----------------------------------- //! FIXME_docs bool RlinkPortFifo::Open(const std::string& url, RerrMsg& emsg) { if (IsOpen()) Close(); if (!fUrl.Set(url, "|keep|", emsg)) return false; // Note: _rx fifo must be opened before the _tx fifo, otherwise the test // bench might close with EOF on read prematurely (is a race condition). fFdWrite = OpenFifo(fUrl.Path() + "_rx", true, emsg); if (fFdWrite < 0) return false; fFdRead = OpenFifo(fUrl.Path() + "_tx", false, emsg); if (fFdRead < 0) { close(fFdWrite); fFdWrite = -1; return false; } fIsOpen = true; return true; } //------------------------------------------+----------------------------------- //! FIXME_docs int RlinkPortFifo::OpenFifo(const std::string& name, bool snd, RerrMsg& emsg) { struct stat stat_fifo; int irc; irc = stat(name.c_str(), &stat_fifo); if (irc == 0) { if ((stat_fifo.st_mode & S_IFIFO) == 0) { emsg.Init("RlinkPortFifo::OpenFiFo()", string("'") + name + "' exists but is not a pipe"); return -1; } } else { mode_t mode = S_IRUSR | S_IWUSR; // user read and write allowed irc = ::mkfifo(name.c_str(), mode); if (irc != 0) { emsg.InitErrno("RlinkPortFifo::OpenFifo()", string("mkfifo() for '") + name + "' failed: ", errno); return -1; } } irc = ::open(name.c_str(), snd ? O_WRONLY : O_RDONLY); if (irc < 0) { emsg.InitErrno("RlinkPortFifo::OpenFifo()", string("open() for '") + name + "' failed: ", errno); return -1; } return irc; } } // end namespace Retro
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