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Side by Side Diff: mojo/edk/system/parent_token_serializer_state_win.h

Issue 1465183005: Rename mojo::TokenSerializer to mojo::Broker. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: fix win component Created 5 years ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_STATE_WIN_H_
6 #define MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_STATE_WIN_H_
7
8 #include "base/compiler_specific.h"
9 #include "base/containers/hash_tables.h"
10 #include "base/memory/singleton.h"
11 #include "base/synchronization/lock.h"
12 #include "base/threading/thread.h"
13 #include "mojo/edk/embedder/scoped_platform_handle.h"
14 #include "mojo/edk/system/system_impl_export.h"
15 #include "mojo/edk/system/token_serializer_win.h"
16
17 namespace mojo {
18 namespace edk {
19
20 // Common state that has to live in a parent process on Windows. There is one
21 // instance of this class in the parent process. This class also implements the
22 // TokenSerializer interface for use by code in the parent process.
23 class MOJO_SYSTEM_IMPL_EXPORT ParentTokenSerializerState
24 : NON_EXPORTED_BASE(public TokenSerializer) {
25 public:
26 static ParentTokenSerializerState* GetInstance();
27
28 // TokenSerializer implementation.
29 void CreatePlatformChannelPair(ScopedPlatformHandle* server,
30 ScopedPlatformHandle* client) override;
31 void HandleToToken(const PlatformHandle* platform_handles,
32 size_t count,
33 uint64_t* tokens) override;
34 void TokenToHandle(const uint64_t* tokens,
35 size_t count,
36 PlatformHandle* handles) override;
37
38 scoped_refptr<base::TaskRunner> token_serialize_thread() {
39 return token_serialize_thread_.task_runner();
40 }
41
42 private:
43 friend struct base::DefaultSingletonTraits<ParentTokenSerializerState>;
44
45 ParentTokenSerializerState();
46 ~ParentTokenSerializerState() override;
47
48 // A separate thread to handle sync IPCs from child processes for exchanging
49 // platform handles with tokens. We use a separate thread because latency is
50 // very sensitive (since any time a pipe is created or sent, a child process
51 // makes a sync call to this class).
52 base::Thread token_serialize_thread_;
53
54 // Used in the parent (unsandboxed) process to hold a mapping between HANDLES
55 // and tokens. When a child process wants to send a HANDLE to another process,
56 // it exchanges it to a token and then the other process exchanges that token
57 // back to a HANDLE.
58 base::Lock lock_; // Guards access to below.
59 base::hash_map<uint64_t, HANDLE> token_map_;
60 };
61
62 } // namespace edk
63 } // namespace mojo
64
65 #endif // MOJO_EDK_SYSTEM_PARENT_TOKEN_SERIALIZER_STATE_WIN_H_
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