75 lines
1.6 KiB
C++
75 lines
1.6 KiB
C++
/* -*- 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_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 SharedMemory
|
|
{
|
|
public:
|
|
typedef base::FileDescriptor Handle;
|
|
|
|
SharedMemoryBasic();
|
|
|
|
SharedMemoryBasic(const Handle& aHandle);
|
|
|
|
virtual bool Create(size_t aNbytes) override;
|
|
|
|
virtual bool Map(size_t nBytes) override;
|
|
|
|
virtual void* memory() const override
|
|
{
|
|
return mMemory;
|
|
}
|
|
|
|
virtual SharedMemoryType Type() const override
|
|
{
|
|
return TYPE_BASIC;
|
|
}
|
|
|
|
static Handle NULLHandle()
|
|
{
|
|
return Handle();
|
|
}
|
|
|
|
static bool IsHandleValid(const Handle &aHandle)
|
|
{
|
|
return aHandle.fd >= 0;
|
|
}
|
|
|
|
bool ShareToProcess(base::ProcessId aProcessId,
|
|
Handle* aNewHandle);
|
|
|
|
private:
|
|
~SharedMemoryBasic();
|
|
|
|
void Unmap();
|
|
void Destroy();
|
|
|
|
// 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
|