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 "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;
	}

	if((out->data = malloc(len))) {
		p_lseek(fd, offset, SEEK_SET);
		p_read(fd, out->data, len);
	}

	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);
	free(map->data);

	return 0;
}

#endif