| /* |
| * 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 |
| |