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* Distributed under the OSI-approved Apache License, Version 2.0. See
* accompanying file Copyright.txt for details.
*
* FileDescriptor.cpp file descriptor
*
* Created on: Oct 6, 2016
* Author: wfg
*/
/// \cond EXCLUDE_FROM_DOXYGEN
#include <fcntl.h> //open
#include <ios> //std::ios_base::failure
#include <stddef.h> // write output
#include <sys/stat.h> //open
#include <sys/types.h> //open
#include <unistd.h> // write, close
/// \endcond
#include "transport/file/FileDescriptor.h"
namespace adios
{
namespace transport
{
FileDescriptor::FileDescriptor(MPI_Comm mpiComm, const bool debugMode)
: Transport("POSIX_IO", mpiComm, debugMode)
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{
}
FileDescriptor::~FileDescriptor()
{
if (m_FileDescriptor != -1)
{
close(m_FileDescriptor);
}
}
void FileDescriptor::Open(const std::string name, const std::string accessMode)
{
m_Name = name;
m_AccessMode = accessMode;
if (accessMode == "w" || accessMode == "write")
{
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[0].SetInitialTime();
m_FileDescriptor = open(m_Name.c_str(), O_WRONLY | O_CREAT, 0777);
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[0].SetTime();
}
else if (accessMode == "a" || accessMode == "append")
{
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[0].SetInitialTime();
m_FileDescriptor =
open(m_Name.c_str(), O_WRONLY | O_APPEND); // we need to change this
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[0].SetTime();
}
else if (accessMode == "r" || accessMode == "read")
{
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[0].SetInitialTime();
m_FileDescriptor = open(m_Name.c_str(), O_RDONLY);
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[0].SetTime();
}
if (m_DebugMode == true)
{
if (m_FileDescriptor == -1)
throw std::ios_base::failure("ERROR: couldn't open file " + m_Name +
", from call to Open in FD transport using "
"POSIX open. Does file exists?\n");
}
}
void FileDescriptor::Write(const char *buffer, std::size_t size)
{
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[1].SetInitialTime();
auto writtenSize = write(m_FileDescriptor, buffer, size);
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[1].SetTime();
if (m_DebugMode == true)
{
if (writtenSize == -1)
throw std::ios_base::failure("ERROR: couldn't write to file " + m_Name +
", in call to POSIX write\n");
if (static_cast<std::size_t>(writtenSize) != size)
throw std::ios_base::failure(
"ERROR: written size + " + std::to_string(writtenSize) +
" is not equal to intended size " + std::to_string(size) +
" in file " + m_Name + ", in call to POSIX write\n");
}
}
void FileDescriptor::Close()
{
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[2].SetInitialTime();
int status = close(m_FileDescriptor);
if (m_Profiler.m_IsActive == true)
m_Profiler.m_Timers[2].SetTime();
if (m_DebugMode == true)
{
if (status == -1)
throw std::ios_base::failure("ERROR: couldn't close file " + m_Name +
", in call to POSIX write\n");
}
m_IsOpen = false;
}
} // end namespace transport
} // end namespace