/src/mozilla-central/ipc/glue/SharedMemory_posix.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
2 | | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
3 | | /* This Source Code Form is subject to the terms of the Mozilla Public |
4 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #include <sys/mman.h> // mprotect |
8 | | #include <unistd.h> // sysconf |
9 | | |
10 | | #include "mozilla/ipc/SharedMemory.h" |
11 | | |
12 | | namespace mozilla { |
13 | | namespace ipc { |
14 | | |
15 | | void |
16 | | SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights) |
17 | 0 | { |
18 | 0 | int flags = 0; |
19 | 0 | if (aRights & RightsRead) |
20 | 0 | flags |= PROT_READ; |
21 | 0 | if (aRights & RightsWrite) |
22 | 0 | flags |= PROT_WRITE; |
23 | 0 | if (RightsNone == aRights) |
24 | 0 | flags = PROT_NONE; |
25 | 0 |
|
26 | 0 | if (0 < mprotect(aAddr, aSize, flags)) |
27 | 0 | MOZ_CRASH("can't mprotect()"); |
28 | 0 | } |
29 | | |
30 | | size_t |
31 | | SharedMemory::SystemPageSize() |
32 | 0 | { |
33 | 0 | return sysconf(_SC_PAGESIZE); |
34 | 0 | } |
35 | | |
36 | | } // namespace ipc |
37 | | } // namespace mozilla |