lib/got_lib_lockfile.h

   1 /*
   2  * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 /*
  18  * Git-compatible lock file implementation. Lock files are used to
  19  * ensure exclusive access when files in a Git repository are modified.
  20  */
  21
  22 #define GOT_LOCKFILE_SUFFIX ".lock"
  23
  24 struct got_lockfile {
  25         char *path;
  26         char *locked_path;
  27         int fd;
  28 };
  29
  30 const struct got_error *got_lockfile_lock(struct got_lockfile **,
  31     const char *, int);
  32 const struct got_error *got_lockfile_unlock(struct got_lockfile *, int);