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| 1 // Copyright 2014 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_CHANNEL_MANAGER_H_ | |
| 6 #define MOJO_EDK_SYSTEM_CHANNEL_MANAGER_H_ | |
| 7 | |
| 8 #include <stdint.h> | |
| 9 | |
| 10 #include "base/containers/hash_tables.h" | |
| 11 #include "base/macros.h" | |
| 12 #include "base/memory/ref_counted.h" | |
| 13 #include "base/synchronization/lock.h" | |
| 14 #include "base/task_runner.h" | |
| 15 #include "mojo/edk/system/channel.h" | |
| 16 #include "mojo/edk/system/channel_info.h" | |
| 17 | |
| 18 namespace mojo { | |
| 19 namespace system { | |
| 20 | |
| 21 // IDs for |Channel|s managed by a |ChannelManager|. (IDs should be thought of | |
| 22 // as specific to a given |ChannelManager|.) 0 is never a valid ID. | |
| 23 // | |
| 24 // Note: We currently just use the pointer of the |Channel| casted to a | |
| 25 // |uintptr_t|, but we reserve the right to change this. | |
| 26 typedef uintptr_t ChannelId; | |
| 27 | |
| 28 // This class manages and "owns" |Channel|s (which typically connect to other | |
| 29 // processes) for a given process. This class is thread-safe. | |
| 30 class MOJO_SYSTEM_IMPL_EXPORT ChannelManager { | |
| 31 public: | |
| 32 ChannelManager(); | |
| 33 ~ChannelManager(); | |
| 34 | |
| 35 // Gets the ID for a given channel. | |
| 36 // | |
| 37 // Note: This is currently a static method and thus may be called under | |
| 38 // |lock_|. If this is ever made non-static (i.e., made specific to a given | |
| 39 // |ChannelManager|), those call sites may have to changed. | |
| 40 static ChannelId GetChannelId(const Channel* channel) { | |
| 41 return reinterpret_cast<ChannelId>(channel); | |
| 42 } | |
| 43 | |
| 44 // Adds |channel| to the set of |Channel|s managed by this |ChannelManager|; | |
| 45 // |channel_thread_task_runner| should be the task runner for |channel|'s | |
| 46 // creation (a.k.a. I/O) thread. | |
| 47 // | |
| 48 // |channel| should either already be initialized or at least already have a | |
| 49 // task posted to |channel_thread_task_runner| to initialize it. It should not | |
| 50 // be managed by any |ChannelManager| yet. | |
| 51 // | |
| 52 // Returns the ID for the added channel. | |
| 53 ChannelId AddChannel( | |
| 54 scoped_refptr<Channel> channel, | |
| 55 scoped_refptr<base::TaskRunner> channel_thread_task_runner); | |
| 56 | |
| 57 // Shuts down the channel specified by the given ID. It is up to the caller to | |
| 58 // guarantee that this is only called once per channel (that was added using | |
| 59 // |AddChannel()|). | |
| 60 void ShutdownChannel(ChannelId channel_id); | |
| 61 | |
| 62 private: | |
| 63 // Note: |Channel| methods should not be called under |lock_|. | |
| 64 base::Lock lock_; // Protects the members below. | |
| 65 | |
| 66 base::hash_map<ChannelId, ChannelInfo> channel_infos_; | |
| 67 | |
| 68 DISALLOW_COPY_AND_ASSIGN(ChannelManager); | |
| 69 }; | |
| 70 | |
| 71 } // namespace system | |
| 72 } // namespace mojo | |
| 73 | |
| 74 #endif // MOJO_EDK_SYSTEM_CHANNEL_MANAGER_H_ | |
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Chromium Code Reviews
Issue 728043002:
Revert of Update mojo sdk to rev afb4440fd5a10cba980878c326180b7ad7960480 (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master