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/*
* Copyright (C) 2009-2011 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;
assert((out != NULL) && (len > 0));
if ((out == NULL) || (len == 0)) {
errno = EINVAL;
return git__throw(GIT_ERROR, "Failed to mmap. No map or zero length");
}
out->data = NULL;
out->len = 0;
if (prot & GIT_PROT_WRITE)
mprot = PROT_WRITE;
else if (prot & GIT_PROT_READ)
mprot = PROT_READ;
else {
errno = EINVAL;
return git__throw(GIT_ERROR, "Failed to mmap. Invalid protection parameters");
}
if ((flags & GIT_MAP_TYPE) == GIT_MAP_SHARED)
mflag = MAP_SHARED;
else if ((flags & GIT_MAP_TYPE) == GIT_MAP_PRIVATE)
mflag = MAP_PRIVATE;
if (flags & GIT_MAP_FIXED) {
errno = EINVAL;
return git__throw(GIT_ERROR, "Failed to mmap. FIXED not set");
}
out->data = mmap(NULL, len, mprot, mflag, fd, offset);
if (!out->data || out->data == MAP_FAILED)
return git__throw(GIT_EOSERR, "Failed to mmap. Could not write data");
out->len = len;
return GIT_SUCCESS;
}
int p_munmap(git_map *map)
{
assert(map != NULL);
if (!map)
return git__throw(GIT_ERROR, "Failed to munmap. Map does not exist");
munmap(map->data, map->len);
return GIT_SUCCESS;
}
#endif
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