39 lines
923 B
C++
39 lines
923 B
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <sys/mman.h> // mprotect
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#include <unistd.h> // sysconf
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#include "mozilla/ipc/SharedMemory.h"
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namespace mozilla {
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namespace ipc {
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void
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SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights)
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{
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int flags = 0;
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if (aRights & RightsRead)
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flags |= PROT_READ;
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if (aRights & RightsWrite)
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flags |= PROT_WRITE;
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if (RightsNone == aRights)
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flags = PROT_NONE;
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if (0 < mprotect(aAddr, aSize, flags))
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NS_RUNTIMEABORT("can't mprotect()");
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}
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size_t
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SharedMemory::SystemPageSize()
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{
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return sysconf(_SC_PAGESIZE);
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}
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} // namespace ipc
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} // namespace mozilla
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