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95 lines
2.0 KiB
C++
95 lines
2.0 KiB
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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#ifndef mozilla_ipc_SharedMemoryBasic_chromium_h
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#define mozilla_ipc_SharedMemoryBasic_chromium_h
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#include "base/shared_memory.h"
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#include "SharedMemory.h"
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#include "nsDebug.h"
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//
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// This is a low-level wrapper around platform shared memory. Don't
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// use it directly; use Shmem allocated through IPDL interfaces.
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//
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namespace mozilla {
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namespace ipc {
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class SharedMemoryBasic : public SharedMemory
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{
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public:
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typedef base::SharedMemoryHandle Handle;
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SharedMemoryBasic()
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{
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}
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SharedMemoryBasic(const Handle& aHandle)
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: mSharedMemory(aHandle, false)
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{
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}
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virtual bool Create(size_t aNbytes) MOZ_OVERRIDE
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{
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bool ok = mSharedMemory.Create("", false, false, aNbytes);
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if (ok) {
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Created(aNbytes);
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}
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return ok;
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}
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virtual bool Map(size_t nBytes) MOZ_OVERRIDE
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{
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bool ok = mSharedMemory.Map(nBytes);
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if (ok) {
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Mapped(nBytes);
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}
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return ok;
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}
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virtual void* memory() const MOZ_OVERRIDE
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{
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return mSharedMemory.memory();
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}
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virtual SharedMemoryType Type() const MOZ_OVERRIDE
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{
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return TYPE_BASIC;
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}
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static Handle NULLHandle()
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{
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return base::SharedMemory::NULLHandle();
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}
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static bool IsHandleValid(const Handle &aHandle)
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{
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return base::SharedMemory::IsHandleValid(aHandle);
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}
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bool ShareToProcess(base::ProcessHandle process,
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Handle* new_handle)
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{
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base::SharedMemoryHandle handle;
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bool ret = mSharedMemory.ShareToProcess(process, &handle);
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if (ret)
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*new_handle = handle;
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return ret;
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}
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private:
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base::SharedMemory mSharedMemory;
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};
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} // namespace ipc
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} // namespace mozilla
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#endif // ifndef mozilla_ipc_SharedMemoryBasic_chromium_h
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