xapian-core/common/posixy_wrapper.h

   1 /** @file
   2  * @brief Provides wrappers with POSIXy semantics.
   3  */
   4 /* Copyright 2007 Lemur Consulting Ltd
   5  * Copyright 2007,2012,2014,2018 Olly Betts
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  20  * USA
  21  */
  22
  23 #ifndef XAPIAN_INCLUDED_POSIXY_WRAPPER_H
  24 #define XAPIAN_INCLUDED_POSIXY_WRAPPER_H
  25
  26 #ifdef __WIN32__
  27 /** Version of open() which allows the file to be unlinked while open. */
  28 int posixy_open(const char *filename, int flags);
  29
  30 inline int
  31 posixy_open(const char *filename, int flags, int)
  32 {
  33     // mode is ignored.
  34     return posixy_open(filename, flags);
  35 }
  36
  37 /** Version of rename() which overwrites an existing destination file. */
  38 int posixy_rename(const char *from, const char *to);
  39 #else
  40 # include <cstdio>
  41 # include "safeunistd.h"
  42 # include <sys/types.h>
  43 # include "safesysstat.h"
  44 # include "safefcntl.h"
  45 # define posixy_open ::open
  46 # define posixy_rename(F, T) std::rename(F, T)
  47 #endif
  48
  49 #if defined __CYGWIN__ || defined __WIN32__
  50 /** Version of unlink() with POSIX-like semantics (open files can be unlinked).
  51  *
  52  *  NB The file must have been opened with posixy_open() for this to work.
  53  */
  54 int posixy_unlink(const char * filename);
  55 #else
  56 # define posixy_unlink(F) unlink(F)
  57 #endif
  58
  59 #endif /* XAPIAN_INCLUDED_POSIXY_WRAPPER_H */