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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_ProcessUtils_h
#define mozilla_ipc_ProcessUtils_h
#include <functional>
#include <vector>
#include "mozilla/ipc/FileDescriptor.h"
#include "base/shared_memory.h"
#include "mozilla/Maybe.h"
#include "mozilla/Preferences.h"
#include "nsXULAppAPI.h"
namespace mozilla {
namespace ipc {
class GeckoChildProcessHost;
// You probably should call ContentChild::SetProcessName instead of calling
// this directly.
void SetThisProcessName(const char* aName);
class SharedPreferenceSerializer final {
public:
explicit SharedPreferenceSerializer();
SharedPreferenceSerializer(SharedPreferenceSerializer&& aOther);
~SharedPreferenceSerializer();
bool SerializeToSharedMemory(const GeckoProcessType aDestinationProcessType,
const nsACString& aDestinationRemoteType);
size_t GetPrefMapSize() const { return mPrefMapSize; }
size_t GetPrefsLength() const { return mPrefsLength; }
const UniqueFileHandle& GetPrefsHandle() const { return mPrefsHandle; }
const UniqueFileHandle& GetPrefMapHandle() const { return mPrefMapHandle; }
void AddSharedPrefCmdLineArgs(GeckoChildProcessHost& procHost,
std::vector<std::string>& aExtraOpts) const;
private:
DISALLOW_COPY_AND_ASSIGN(SharedPreferenceSerializer);
size_t mPrefMapSize;
size_t mPrefsLength;
UniqueFileHandle mPrefMapHandle;
UniqueFileHandle mPrefsHandle;
};
class SharedPreferenceDeserializer final {
public:
SharedPreferenceDeserializer();
~SharedPreferenceDeserializer();
bool DeserializeFromSharedMemory(uint64_t aPrefsHandle,
uint64_t aPrefMapHandle, uint64_t aPrefsLen,
uint64_t aPrefMapSize);
const FileDescriptor& GetPrefMapHandle() const;
private:
DISALLOW_COPY_AND_ASSIGN(SharedPreferenceDeserializer);
Maybe<FileDescriptor> mPrefMapHandle;
Maybe<size_t> mPrefsLen;
Maybe<size_t> mPrefMapSize;
base::SharedMemory mShmem;
};
#ifdef ANDROID
// Android doesn't use -prefsHandle or -prefMapHandle. It gets those FDs
// another way.
void SetPrefsFd(int aFd);
void SetPrefMapFd(int aFd);
#endif
// Generate command line argument to spawn a child process. If the shared memory
// is not properly initialized, this would be a no-op.
void ExportSharedJSInit(GeckoChildProcessHost& procHost,
std::vector<std::string>& aExtraOpts);
// Initialize the content used by the JS engine during the initialization of a
// JS::Runtime.
bool ImportSharedJSInit(uint64_t aJsInitHandle, uint64_t aJsInitLen);
} // namespace ipc
} // namespace mozilla
#endif // ifndef mozilla_ipc_ProcessUtils_h
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