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91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* fd.h--
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* Virtual file descriptor definitions.
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: fd.h,v 1.5 1996/11/08 06:02:12 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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/*
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* calls:
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*
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* File {Close, Read, Write, Seek, Tell, Sync}
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* {File Name Open, Allocate, Free} File
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*
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* These are NOT JUST RENAMINGS OF THE UNIX ROUTINES.
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* use them for all file activity...
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*
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* fd = FilePathOpenFile("foo", O_RDONLY);
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* File fd;
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*
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* use AllocateFile if you need a file descriptor in some other context.
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* it will make sure that there is a file descriptor free
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*
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* use FreeFile to let the virtual file descriptor package know that
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* there is now a free fd (when you are done with it)
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*
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* AllocateFile();
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* FreeFile();
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*/
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#ifndef FD_H
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#define FD_H
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/*
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* FileOpen uses the standard UNIX open(2) flags.
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*/
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#ifndef O_RDONLY
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#endif /* O_RDONLY */
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/*
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* FileSeek uses the standard UNIX lseek(2) flags.
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*/
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#ifndef WIN32
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#else
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#ifndef SEEK_SET
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#endif /* SEEK_SET */
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#endif /* WIN32 */
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typedef char *FileName;
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typedef int File;
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/* originally in libpq-fs.h */
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struct pgstat { /* just the fields we need from stat structure */
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int st_ino;
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int st_mode;
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unsigned int st_size;
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unsigned int st_sizehigh; /* high order bits */
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/* 2^64 == 1.8 x 10^20 bytes */
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int st_uid;
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int st_atime_s; /* just the seconds */
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int st_mtime_s; /* since SysV and the new BSD both have */
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int st_ctime_s; /* usec fields.. */
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};
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/*
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* prototypes for functions in fd.c
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*/
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extern void FileInvalidate(File file);
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extern File FileNameOpenFile(FileName fileName, int fileFlags, int fileMode);
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extern File PathNameOpenFile(FileName fileName, int fileFlags, int fileMode);
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extern void FileClose(File file);
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extern void FileUnlink(File file);
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extern int FileRead(File file, char *buffer, int amount);
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extern int FileWrite(File file, char *buffer, int amount);
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extern long FileSeek(File file, long offset, int whence);
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extern long FileTell(File file);
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extern int FileTruncate(File file, int offset);
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extern int FileSync(File file);
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extern int FileNameUnlink(char *filename);
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extern void AllocateFile(void);
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extern void FreeFile(void);
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extern void closeAllVfds(void);
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extern void closeOneVfd(void);
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extern int pg_fsync(int fd);
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#endif /* FD_H */
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