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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_android_h
#define mozilla_ipc_SharedMemoryBasic_android_h
#include "base/file_descriptor_posix.h"
#include "SharedMemory.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 final : public SharedMemoryCommon<base::FileDescriptor>
{
public:
SharedMemoryBasic();
virtual bool SetHandle(const Handle& aHandle) override;
virtual bool Create(size_t aNbytes) override;
virtual bool Map(size_t nBytes) override;
virtual void CloseHandle() override;
virtual void* memory() const override
{
return mMemory;
}
virtual SharedMemoryType Type() const override
{
return TYPE_BASIC;
}
static Handle NULLHandle()
{
return Handle();
}
virtual bool IsHandleValid(const Handle &aHandle) const override
{
return aHandle.fd >= 0;
}
virtual bool ShareToProcess(base::ProcessId aProcessId,
Handle* aNewHandle) override;
private:
~SharedMemoryBasic();
void Unmap();
// The /dev/ashmem fd we allocate.
int mShmFd;
// Pointer to mapped region, null if unmapped.
void *mMemory;
};
} // namespace ipc
} // namespace mozilla
#endif // ifndef mozilla_ipc_SharedMemoryBasic_android_h
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