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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_ipc_SharedMemoryBasic_chromium_h
#define mozilla_ipc_SharedMemoryBasic_chromium_h
#include "base/shared_memory.h"
#include "SharedMemory.h"
#include "nsDebug.h"
//
// This is a low-level wrapper around platform shared memory. Don't
// use it directly; use Shmem allocated through IPDL interfaces.
//
namespace mozilla {
namespace ipc {
class SharedMemoryBasic : public SharedMemory
{
public:
typedef base::SharedMemoryHandle Handle;
SharedMemoryBasic()
{
}
SharedMemoryBasic(const Handle& aHandle)
: mSharedMemory(aHandle, false)
{
}
virtual bool Create(size_t aNbytes) MOZ_OVERRIDE
{
bool ok = mSharedMemory.Create("", false, false, aNbytes);
if (ok) {
Created(aNbytes);
}
return ok;
}
virtual bool Map(size_t nBytes) MOZ_OVERRIDE
{
bool ok = mSharedMemory.Map(nBytes);
if (ok) {
Mapped(nBytes);
}
return ok;
}
virtual void* memory() const MOZ_OVERRIDE
{
return mSharedMemory.memory();
}
virtual SharedMemoryType Type() const MOZ_OVERRIDE
{
return TYPE_BASIC;
}
static Handle NULLHandle()
{
return base::SharedMemory::NULLHandle();
}
static bool IsHandleValid(const Handle &aHandle)
{
return base::SharedMemory::IsHandleValid(aHandle);
}
bool ShareToProcess(base::ProcessHandle process,
Handle* new_handle)
{
base::SharedMemoryHandle handle;
bool ret = mSharedMemory.ShareToProcess(process, &handle);
if (ret)
*new_handle = handle;
return ret;
}
private:
base::SharedMemory mSharedMemory;
};
} // namespace ipc
} // namespace mozilla
#endif // ifndef mozilla_ipc_SharedMemoryBasic_chromium_h
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