1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * vim: sw=2 ts=8 et :
3 : */
4 : /* ***** BEGIN LICENSE BLOCK *****
5 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 : *
7 : * The contents of this file are subject to the Mozilla Public License Version
8 : * 1.1 (the "License"); you may not use this file except in compliance with
9 : * the License. You may obtain a copy of the License at
10 : * http://www.mozilla.org/MPL/
11 : *
12 : * Software distributed under the License is distributed on an "AS IS" basis,
13 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14 : * for the specific language governing rights and limitations under the
15 : * License.
16 : *
17 : * The Original Code is Mozilla IPC.
18 : *
19 : * The Initial Developer of the Original Code is
20 : * The Mozilla Foundation
21 : * Portions created by the Initial Developer are Copyright (C) 2009
22 : * the Initial Developer. All Rights Reserved.
23 : *
24 : * Contributor(s):
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either the GNU General Public License Version 2 or later (the "GPL"), or
28 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
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35 : * the provisions above, a recipient may use your version of this file under
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37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : #include <sys/mman.h> // mprotect
41 : #include <unistd.h> // sysconf
42 :
43 : #include "mozilla/ipc/SharedMemory.h"
44 :
45 : namespace mozilla {
46 : namespace ipc {
47 :
48 : void
49 0 : SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights)
50 : {
51 0 : int flags = 0;
52 0 : if (aRights & RightsRead)
53 0 : flags |= PROT_READ;
54 0 : if (aRights & RightsWrite)
55 0 : flags |= PROT_WRITE;
56 0 : if (RightsNone == aRights)
57 0 : flags = PROT_NONE;
58 :
59 0 : if (0 < mprotect(aAddr, aSize, flags))
60 0 : NS_RUNTIMEABORT("can't mprotect()");
61 0 : }
62 :
63 : size_t
64 0 : SharedMemory::SystemPageSize()
65 : {
66 0 : return sysconf(_SC_PAGESIZE);
67 : }
68 :
69 : } // namespace ipc
70 : } // namespace mozilla
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