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/******************************************************* |
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* |
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* Copyright (c) 2003-2010 by University of Queensland |
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* Earth Systems Science Computational Center (ESSCC) |
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* http://www.uq.edu.au/esscc |
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* |
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* Primary Business: Queensland, Australia |
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* Licensed under the Open Software License version 3.0 |
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* http://www.opensource.org/licenses/osl-3.0.php |
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* |
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*******************************************************/ |
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#include <weipa/FileWriter.h> |
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#include <sstream> |
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#include <iostream> |
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|
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using namespace std; |
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|
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namespace weipa { |
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|
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FileWriter::FileWriter() : |
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mpiRank(0), |
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mpiSize(1) |
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{ |
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} |
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|
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#if HAVE_MPI |
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FileWriter::FileWriter(MPI_Comm comm) : |
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mpiComm(comm) |
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{ |
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MPI_Comm_rank(mpiComm, &mpiRank); |
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MPI_Comm_size(mpiComm, &mpiSize); |
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} |
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#endif |
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|
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bool FileWriter::openFile(string filename) |
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{ |
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bool success=false; |
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|
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if (mpiSize>1) { |
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#if HAVE_MPI |
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// remove file first if it exists |
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int error = 0; |
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int mpiErr; |
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if (mpiRank == 0) { |
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ifstream f(filename.c_str()); |
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if (f.is_open()) { |
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f.close(); |
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if (remove(filename.c_str())) { |
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error=1; |
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} |
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} |
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} |
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MPI_Allreduce(&error, &mpiErr, 1, MPI_INT, MPI_MAX, mpiComm); |
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if (mpiErr != 0) { |
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cerr << "Error removing " << filename << "!" << endl; |
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return false; |
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} |
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|
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MPI_Info mpiInfo = MPI_INFO_NULL; |
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int amode = MPI_MODE_CREATE|MPI_MODE_WRONLY|MPI_MODE_UNIQUE_OPEN; |
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mpiErr = MPI_File_open(mpiComm, const_cast<char*>(filename.c_str()), |
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amode, mpiInfo, &fileHandle); |
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if (mpiErr == MPI_SUCCESS) { |
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mpiErr = MPI_File_set_view(fileHandle, 0, MPI_CHAR, MPI_CHAR, |
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const_cast<char*>("native"), mpiInfo); |
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} |
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if (mpiErr != MPI_SUCCESS) { |
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cerr << "Error opening " << filename << " for parallel writing!" << endl; |
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} else { |
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success=true; |
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} |
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#endif |
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} else { |
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ofs.open(filename.c_str()); |
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success = !ofs.fail(); |
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} |
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return success; |
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} |
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|
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bool FileWriter::writeShared(ostringstream& oss) |
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{ |
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bool success=false; |
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if (mpiSize>1) { |
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#if HAVE_MPI |
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MPI_Status mpiStatus; |
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string contents = oss.str(); |
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int mpiErr = MPI_File_write_shared( |
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fileHandle, const_cast<char*>(contents.c_str()), |
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contents.length(), MPI_CHAR, &mpiStatus); |
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oss.str(""); |
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success=(mpiErr==0); |
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#endif |
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} else { |
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ofs << oss.str(); |
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oss.str(""); |
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success=!ofs.fail(); |
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} |
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return success; |
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} |
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|
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bool FileWriter::writeOrdered(ostringstream& oss) |
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{ |
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bool success=false; |
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if (mpiSize>1) { |
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#if HAVE_MPI |
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MPI_Status mpiStatus; |
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string contents = oss.str(); |
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int mpiErr = MPI_File_write_ordered( |
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fileHandle, const_cast<char*>(contents.c_str()), |
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contents.length(), MPI_CHAR, &mpiStatus); |
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oss.str(""); |
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success=(mpiErr==0); |
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#endif |
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} else { |
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ofs << oss.str(); |
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oss.str(""); |
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success=!ofs.fail(); |
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} |
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return success; |
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} |
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|
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void FileWriter::close() |
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{ |
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if (mpiSize>1) { |
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#if HAVE_MPI |
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MPI_File_close(&fileHandle); |
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#endif |
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} else { |
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ofs.close(); |
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} |
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} |
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|
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} // namespace weipa |
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