зеркало из https://github.com/mozilla/gecko-dev.git
92 строки
2.8 KiB
C++
92 строки
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_ipc_ProcessUtils_h
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#define mozilla_ipc_ProcessUtils_h
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#include <vector>
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#include "FileDescriptor.h"
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#include "base/shared_memory.h"
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#include "mozilla/Maybe.h"
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namespace mozilla {
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namespace ipc {
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class GeckoChildProcessHost;
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// You probably should call ContentChild::SetProcessName instead of calling
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// this directly.
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void SetThisProcessName(const char* aName);
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class SharedPreferenceSerializer final {
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public:
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SharedPreferenceSerializer();
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SharedPreferenceSerializer(SharedPreferenceSerializer&& aOther);
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~SharedPreferenceSerializer();
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bool SerializeToSharedMemory();
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size_t GetPrefMapSize() const { return mPrefMapSize; }
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size_t GetPrefsLength() const { return mPrefsLength; }
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const UniqueFileHandle& GetPrefsHandle() const { return mPrefsHandle; }
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const UniqueFileHandle& GetPrefMapHandle() const { return mPrefMapHandle; }
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void AddSharedPrefCmdLineArgs(GeckoChildProcessHost& procHost,
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std::vector<std::string>& aExtraOpts) const;
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private:
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DISALLOW_COPY_AND_ASSIGN(SharedPreferenceSerializer);
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size_t mPrefMapSize;
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size_t mPrefsLength;
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UniqueFileHandle mPrefMapHandle;
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UniqueFileHandle mPrefsHandle;
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};
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class SharedPreferenceDeserializer final {
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public:
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SharedPreferenceDeserializer();
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~SharedPreferenceDeserializer();
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bool DeserializeFromSharedMemory(char* aPrefsHandleStr,
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char* aPrefMapHandleStr, char* aPrefsLenStr,
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char* aPrefMapSizeStr);
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const base::SharedMemoryHandle& GetPrefsHandle() const;
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const FileDescriptor& GetPrefMapHandle() const;
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private:
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DISALLOW_COPY_AND_ASSIGN(SharedPreferenceDeserializer);
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Maybe<base::SharedMemoryHandle> mPrefsHandle;
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Maybe<FileDescriptor> mPrefMapHandle;
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Maybe<size_t> mPrefsLen;
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Maybe<size_t> mPrefMapSize;
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base::SharedMemory mShmem;
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};
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#ifdef ANDROID
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// Android doesn't use -prefsHandle or -prefMapHandle. It gets those FDs
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// another way.
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void SetPrefsFd(int aFd);
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void SetPrefMapFd(int aFd);
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#endif
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// Generate command line argument to spawn a child process. If the shared memory
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// is not properly initialized, this would be a no-op.
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void ExportSharedJSInit(GeckoChildProcessHost& procHost,
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std::vector<std::string>& aExtraOpts);
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// Initialize the content used by the JS engine during the initialization of a
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// JS::Runtime.
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bool ImportSharedJSInit(char* aJsInitHandleStr, char* aJsInitLenStr);
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} // namespace ipc
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} // namespace mozilla
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#endif // ifndef mozilla_ipc_ProcessUtils_h
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