tor-browser

The Tor Browser
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ProcessUtils.h (2634B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_ipc_ProcessUtils_h
      8 #define mozilla_ipc_ProcessUtils_h
      9 
     10 #include <functional>
     11 
     12 #include "mozilla/GeckoArgs.h"
     13 #include "mozilla/ipc/FileDescriptor.h"
     14 #include "mozilla/ipc/SharedMemoryHandle.h"
     15 #include "mozilla/ipc/SharedMemoryMapping.h"
     16 #include "mozilla/Preferences.h"
     17 #include "nsXULAppAPI.h"
     18 
     19 namespace mozilla {
     20 namespace ipc {
     21 
     22 class GeckoChildProcessHost;
     23 
     24 // You probably should call ContentChild::SetProcessName instead of calling
     25 // this directly.
     26 void SetThisProcessName(const char* aName);
     27 
     28 class SharedPreferenceSerializer final {
     29 public:
     30  explicit SharedPreferenceSerializer();
     31  SharedPreferenceSerializer(SharedPreferenceSerializer&& aOther);
     32  ~SharedPreferenceSerializer();
     33 
     34  bool SerializeToSharedMemory(const GeckoProcessType aDestinationProcessType,
     35                               const nsACString& aDestinationRemoteType);
     36 
     37  const ReadOnlySharedMemoryHandle& GetPrefsHandle() const {
     38    return mPrefsHandle;
     39  }
     40 
     41  const ReadOnlySharedMemoryHandle& GetPrefMapHandle() const {
     42    return mPrefMapHandle;
     43  }
     44 
     45  void AddSharedPrefCmdLineArgs(GeckoChildProcessHost& procHost,
     46                                geckoargs::ChildProcessArgs& aExtraOpts) const;
     47 
     48 private:
     49  DISALLOW_COPY_AND_ASSIGN(SharedPreferenceSerializer);
     50  ReadOnlySharedMemoryHandle mPrefMapHandle;
     51  ReadOnlySharedMemoryHandle mPrefsHandle;
     52 };
     53 
     54 class SharedPreferenceDeserializer final {
     55 public:
     56  SharedPreferenceDeserializer();
     57  ~SharedPreferenceDeserializer();
     58 
     59  bool DeserializeFromSharedMemory(ReadOnlySharedMemoryHandle&& aPrefsHandle,
     60                                   ReadOnlySharedMemoryHandle&& aPrefMapHandle);
     61 
     62 private:
     63  DISALLOW_COPY_AND_ASSIGN(SharedPreferenceDeserializer);
     64  ReadOnlySharedMemoryHandle mPrefMapHandle;
     65  ReadOnlySharedMemoryMapping mShmem;
     66 };
     67 
     68 // Generate command line argument to spawn a child process. If the shared memory
     69 // is not properly initialized, this would be a no-op.
     70 void ExportSharedJSInit(GeckoChildProcessHost& procHost,
     71                        geckoargs::ChildProcessArgs& aExtraOpts);
     72 
     73 // Initialize the content used by the JS engine during the initialization of a
     74 // JS::Runtime.
     75 bool ImportSharedJSInit(ReadOnlySharedMemoryHandle&& aJsInitHandle);
     76 
     77 }  // namespace ipc
     78 }  // namespace mozilla
     79 
     80 #endif  // ifndef mozilla_ipc_ProcessUtils_h