зеркало из https://github.com/mozilla/gecko-dev.git
57 строки
1.4 KiB
C++
57 строки
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef mozilla_ipc_SharedMemoryImpl_mach_h
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#define mozilla_ipc_SharedMemoryImpl_mach_h
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#include "mozilla/UniquePtrExtensions.h"
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#include <mach/port.h>
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namespace {
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enum Rights { RightsNone = 0, RightsRead = 1 << 0, RightsWrite = 1 << 1 };
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} // namespace
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namespace mozilla::ipc {
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class SharedMemoryImpl {
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public:
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using Handle = mozilla::UniqueMachSendRight;
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enum OpenRights {
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RightsReadOnly = RightsRead,
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RightsReadWrite = RightsRead | RightsWrite,
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};
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Handle CloneHandle();
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Handle TakeHandle();
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bool IsHandleValid(const Handle& aHandle) const;
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bool SetHandle(Handle aHandle, OpenRights aRights);
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static Handle NULLHandle();
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static void* FindFreeAddressSpace(size_t size);
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protected:
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SharedMemoryImpl();
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~SharedMemoryImpl() {}
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bool CreateImpl(size_t size);
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bool MapImpl(size_t nBytes, void* fixedAddress);
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void UnmapImpl(size_t mappedSize);
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void* MemoryImpl() const;
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private:
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mozilla::UniqueMachSendRight mPort;
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// Pointer to mapped region, null if unmapped.
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void* mMemory;
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// Access rights to map an existing region with.
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OpenRights mOpenRights;
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};
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} // namespace mozilla::ipc
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#endif
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