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9a41450b28
Despite the comment saying not to use the "handle" except as an opaque identifier, it is being used to pass the handle to other OS APIs. Direct access to the handle needs to be controlled to make sure freezing is safe, so this patch replaces that with interfaces that are more explicit about ownership and lifetime. Depends on D26739 Differential Revision: https://phabricator.services.mozilla.com/D26740 --HG-- extra : moz-landing-system : lando
80 lines
2.4 KiB
C++
80 lines
2.4 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 "FileDescriptor.h"
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#include "base/shared_memory.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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} // namespace ipc
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} // namespace mozilla
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#endif // ifndef mozilla_ipc_ProcessUtils_h
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