ipc/glue/SharedMemory_posix.cpp@6474c204b198 (annotated)
ipc/glue/SharedMemory_posix.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * vim: sw=2 ts=8 et : |
| michael@0 | 3 | */ |
| michael@0 | 4 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include <sys/mman.h> // mprotect |
| michael@0 | 9 | #include <unistd.h> // sysconf |
| michael@0 | 10 | |
| michael@0 | 11 | #include "mozilla/ipc/SharedMemory.h" |
| michael@0 | 12 | |
| michael@0 | 13 | namespace mozilla { |
| michael@0 | 14 | namespace ipc { |
| michael@0 | 15 | |
| michael@0 | 16 | void |
| michael@0 | 17 | SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights) |
| michael@0 | 18 | { |
| michael@0 | 19 | int flags = 0; |
| michael@0 | 20 | if (aRights & RightsRead) |
| michael@0 | 21 | flags |= PROT_READ; |
| michael@0 | 22 | if (aRights & RightsWrite) |
| michael@0 | 23 | flags |= PROT_WRITE; |
| michael@0 | 24 | if (RightsNone == aRights) |
| michael@0 | 25 | flags = PROT_NONE; |
| michael@0 | 26 | |
| michael@0 | 27 | if (0 < mprotect(aAddr, aSize, flags)) |
| michael@0 | 28 | NS_RUNTIMEABORT("can't mprotect()"); |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | size_t |
| michael@0 | 32 | SharedMemory::SystemPageSize() |
| michael@0 | 33 | { |
| michael@0 | 34 | return sysconf(_SC_PAGESIZE); |
| michael@0 | 35 | } |
| michael@0 | 36 | |
| michael@0 | 37 | } // namespace ipc |
| michael@0 | 38 | } // namespace mozilla |
