greenplumn ioutils 源码
greenplumn ioutils 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/io/ioutils.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// ioutils.h
//
// @doc:
// I/O utilities;
// generic I/O functions that are not associated with file descriptors
//---------------------------------------------------------------------------
#ifndef GPOS_ioutils_H
#define GPOS_ioutils_H
#include <dlfcn.h>
#include <unistd.h>
#include "gpos/io/iotypes.h"
#include "gpos/types.h"
namespace gpos
{
namespace ioutils
{
// check state of file or directory
void CheckState(const CHAR *file_path, SFileStat *file_state);
// check state of file or directory by file descriptor
void CheckStateUsingFileDescriptor(const INT file_descriptor,
SFileStat *file_state);
// check if path is mapped to an accessible file or directory
BOOL PathExists(const CHAR *file_path);
// get file size by file path
ULLONG FileSize(const CHAR *file_path);
// get file size by file descriptor
ULLONG FileSize(const INT file_descriptor);
// check if path is directory
BOOL IsDir(const CHAR *file_path);
// check if path is file
BOOL IsFile(const CHAR *file_path);
// check permissions
BOOL CheckFilePermissions(const CHAR *file_path, ULONG permission_bits);
// create directory with specific permissions
void CreateDir(const CHAR *file_path, ULONG permission_bits);
// delete file
void RemoveDir(const CHAR *file_path);
// delete file
void Unlink(const CHAR *file_path);
// open a file
INT OpenFile(const CHAR *file_path, INT mode, INT permission_bits);
// close a file descriptor
INT CloseFile(INT file_descriptor);
// get file status
INT GetFileState(INT file_descriptor, SFileStat *file_state);
// write to a file descriptor
INT_PTR Write(INT file_descriptor, const void *buffer,
const ULONG_PTR ulpCount);
// read from a file descriptor
INT_PTR Read(INT file_descriptor, void *buffer, const ULONG_PTR ulpCount);
// create a unique temporary directory
void CreateTempDir(CHAR *dir_path);
} // namespace ioutils
} // namespace gpos
#endif // !GPOS_ioutils_H
// EOF
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