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comparison: ipc/glue/SharedMemory_posix.cpp
ipc/glue/SharedMemory_posix.cpp
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * vim: sw=2 ts=8 et : | |
| 3 */ | |
| 4 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 #include <sys/mman.h> // mprotect | |
| 9 #include <unistd.h> // sysconf | |
| 10 | |
| 11 #include "mozilla/ipc/SharedMemory.h" | |
| 12 | |
| 13 namespace mozilla { | |
| 14 namespace ipc { | |
| 15 | |
| 16 void | |
| 17 SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights) | |
| 18 { | |
| 19 int flags = 0; | |
| 20 if (aRights & RightsRead) | |
| 21 flags |= PROT_READ; | |
| 22 if (aRights & RightsWrite) | |
| 23 flags |= PROT_WRITE; | |
| 24 if (RightsNone == aRights) | |
| 25 flags = PROT_NONE; | |
| 26 | |
| 27 if (0 < mprotect(aAddr, aSize, flags)) | |
| 28 NS_RUNTIMEABORT("can't mprotect()"); | |
| 29 } | |
| 30 | |
| 31 size_t | |
| 32 SharedMemory::SystemPageSize() | |
| 33 { | |
| 34 return sysconf(_SC_PAGESIZE); | |
| 35 } | |
| 36 | |
| 37 } // namespace ipc | |
| 38 } // namespace mozilla |
