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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_chromium_h
#define mozilla_ipc_SharedMemoryBasic_chromium_h
#include "base/shared_memory.h"
#include "mozilla/ipc/SharedMemory.h"
#ifdef FUZZING
# include "mozilla/ipc/SharedMemoryFuzzer.h"
#endif
#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 final
: public SharedMemoryCommon<base::SharedMemoryHandle> {
public:
SharedMemoryBasic() = default;
virtual bool SetHandle(Handle aHandle, OpenRights aRights) override {
return mSharedMemory.SetHandle(std::move(aHandle),
aRights == RightsReadOnly);
}
virtual bool Create(size_t aNbytes) override {
bool ok = mSharedMemory.Create(aNbytes);
if (ok) {
Created(aNbytes);
}
return ok;
}
virtual bool Map(size_t nBytes, void* fixed_address = nullptr) override {
bool ok = mSharedMemory.Map(nBytes, fixed_address);
if (ok) {
Mapped(nBytes);
}
return ok;
}
virtual void Unmap() override { mSharedMemory.Unmap(); }
virtual void* memory() const override {
#ifdef FUZZING
return SharedMemoryFuzzer::MutateSharedMemory(mSharedMemory.memory(),
mAllocSize);
#else
return mSharedMemory.memory();
#endif
}
static Handle NULLHandle() { return base::SharedMemory::NULLHandle(); }
virtual bool IsHandleValid(const Handle& aHandle) const override {
return base::SharedMemory::IsHandleValid(aHandle);
}
virtual Handle CloneHandle() override { return mSharedMemory.CloneHandle(); }
virtual Handle TakeHandle() override {
return mSharedMemory.TakeHandle(false);
}
static void* FindFreeAddressSpace(size_t size) {
return base::SharedMemory::FindFreeAddressSpace(size);
}
private:
~SharedMemoryBasic() = default;
base::SharedMemory mSharedMemory;
};
} // namespace ipc
} // namespace mozilla
#endif // ifndef mozilla_ipc_SharedMemoryBasic_chromium_h
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