thodg/libgit2/src/unix/map.c

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• Hash : e1de726c
  Author :
  Date : 2012-03-12T22:55:40
  

  Migrate ODB files to new error handling
  
  This migrates odb.c, odb_loose.c, odb_pack.c and pack.c to
  the new style of error handling.  Also got the unix and win32
  versions of map.c.  There are some minor changes to other
  files but no others were completely converted.
  
  This also contains an update to filebuf so that a zeroed out
  filebuf will not think that the fd (== 0) is actually open
  (and inadvertently call close() on fd 0 if cleaned up).
  
  Lastly, this was built and tested on win32 and contains a
  bunch of fixes for the win32 build which was pretty broken.
  

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• src/unix/map.c

• /*
   * Copyright (C) 2009-2012 the libgit2 contributors
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #include <git2/common.h>
  
  #ifndef GIT_WIN32
  
  #include "map.h"
  #include <sys/mman.h>
  #include <errno.h>
  
  int p_mmap(git_map *out, size_t len, int prot, int flags, int fd, git_off_t offset)
  {
  	int mprot = 0;
  	int mflag = 0;
  
  	if (validate_map_args(out, len, prot, flags, fd, offset) < 0)
  		return -1;
  
  	out->data = NULL;
  	out->len = 0;
  
  	if (prot & GIT_PROT_WRITE)
  		mprot = PROT_WRITE;
  	else if (prot & GIT_PROT_READ)
  		mprot = PROT_READ;
  
  	if ((flags & GIT_MAP_TYPE) == GIT_MAP_SHARED)
  		mflag = MAP_SHARED;
  	else if ((flags & GIT_MAP_TYPE) == GIT_MAP_PRIVATE)
  		mflag = MAP_PRIVATE;
  
  	out->data = mmap(NULL, len, mprot, mflag, fd, offset);
  	if (!out->data || out->data == MAP_FAILED) {
  		giterr_set(GITERR_OS, "Failed to mmap. Could not write data");
  		return -1;
  	}
  
  	out->len = len;
  
  	return 0;
  }
  
  int p_munmap(git_map *map)
  {
  	assert(map != NULL);
  	munmap(map->data, map->len);
  	return 0;
  }
  
  #endif
  
  

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