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/*******************************************************************\ |
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|
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Copyright (C) 2004 Joseph Coffland |
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|
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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02111-1307, USA. |
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|
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For information regarding this software email |
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jcofflan@users.sourceforge.net |
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|
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\*******************************************************************/ |
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|
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#include <protomol/debug/Pipe.h> |
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#include <protomol/base/Exception.h> |
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#include <protomol/base/Zap.h> |
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|
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#include <stdio.h> |
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#include <unistd.h> |
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#include <ext/stdio_filebuf.h> // NOTE: This only works in GCC 3.2 and newer |
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|
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using namespace std; |
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using namespace ProtoMol; |
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|
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Pipe::Pipe() : |
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outStream(0), inStream(0) { |
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if (pipe(pipeFDs)) THROW("Error creating pipe!"); |
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fdOpen[0] = fdOpen[1] = true; |
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} |
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|
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Pipe::~Pipe() { |
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if (fdOpen[0]) closeOut(); |
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if (fdOpen[1]) closeIn(); |
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|
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zap(outStream); |
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zap(inStream); |
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} |
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|
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void Pipe::closeOut() { |
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ASSERT_OR_THROW("Pipe output not open!", fdOpen[0]); |
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close(pipeFDs[0]); |
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fdOpen[0] = false; |
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} |
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|
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void Pipe::closeIn() { |
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ASSERT_OR_THROW("Pipe input not open!", fdOpen[1]); |
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close(pipeFDs[1]); |
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fdOpen[1] = false; |
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} |
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|
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void Pipe::duplicateOutFD(int newFD) { |
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if (dup2(pipeFDs[0], newFD) != newFD) |
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THROW("Error duplicating file descriptor!"); |
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} |
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|
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void Pipe::moveOutFD(int newFD) { |
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duplicateOutFD(newFD); |
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|
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if (close(pipeFDs[0])) THROW("Error closing old file descriptor!"); |
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|
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pipeFDs[0] = newFD; |
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} |
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|
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void Pipe::duplicateInFD(int newFD) { |
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if (dup2(pipeFDs[1], newFD) != newFD) |
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THROW("Error duplicating file descriptor!"); |
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} |
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|
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void Pipe::moveInFD(int newFD) { |
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duplicateInFD(newFD); |
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|
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if (close(pipeFDs[1])) THROW("Error closing old file descriptor!"); |
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|
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pipeFDs[1] = newFD; |
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} |
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|
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istream *Pipe::getOutStream() { |
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ASSERT_OR_THROW("Pipe output not open!", fdOpen[0]); |
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|
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if (!outStream) { |
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// C file descriptor to C++ streams magic |
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// NOTE: This only works in GCC 3.2 and newer |
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// Hopefully they will leave the API alone now! |
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__c_file *pipeFile = fdopen(pipeFDs[0], "r"); |
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__gnu_cxx::stdio_filebuf<char> *pipeBuf = |
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new __gnu_cxx::stdio_filebuf<char>(pipeFile, ios::in); |
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|
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// FIXME There are two leaks above. fdopen must be closed |
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// and the stdio_filebuf must be freed. |
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// Also in the getInStream() |
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|
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outStream = new istream(pipeBuf); |
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} |
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return outStream; |
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} |
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|
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ostream *Pipe::getInStream() { |
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ASSERT_OR_THROW("Pipe input not open!", fdOpen[1]); |
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if (!inStream) { |
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// C file descriptor to C++ streams magic |
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// NOTE: This only works in GCC 3.2 and newer |
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// Hopefully they will leave the API alone now! |
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__c_file *pipeFile = fdopen(pipeFDs[1], "w"); |
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__gnu_cxx::stdio_filebuf<char> *pipeBuf = |
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new __gnu_cxx::stdio_filebuf<char>(pipeFile, ios::out); |
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inStream = new ostream(pipeBuf); |
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} |
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return inStream; |
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} |
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