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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* 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 "posix.h"
#include "map.h"
#include <errno.h>
int p_mmap(git_map *out, size_t len, int prot, int flags, int fd, git_off_t offset)
{
GIT_MMAP_VALIDATE(out, len, prot, flags);
out->data = NULL;
out->len = 0;
if ((prot & GIT_PROT_WRITE) && ((flags & GIT_MAP_TYPE) == GIT_MAP_SHARED)) {
giterr_set(GITERR_OS, "Trying to map shared-writeable");
return -1;
}
out->data = malloc(len);
GITERR_CHECK_ALLOC(out->data);
if ((p_lseek(fd, offset, SEEK_SET) < 0) || ((size_t)p_read(fd, out->data, len) != len)) {
giterr_set(GITERR_OS, "mmap emulation failed");
return -1;
}
out->len = len;
return 0;
}
int p_munmap(git_map *map)
{
assert(map != NULL);
free(map->data);
return 0;
}
#endif
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