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| 1 // Copyright 2016 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 #include "mojo/edk/system/watcher_set.h" |
| 6 |
| 7 #include "mojo/edk/system/request_context.h" |
| 8 #include "mojo/public/c/system/types.h" |
| 9 |
| 10 namespace mojo { |
| 11 namespace edk { |
| 12 |
| 13 WatcherSet::WatcherSet() {} |
| 14 |
| 15 WatcherSet::~WatcherSet() {} |
| 16 |
| 17 void WatcherSet::NotifyForStateChange(const HandleSignalsState& state) { |
| 18 for (const auto& entry : watchers_) |
| 19 entry.second->NotifyForStateChange(state); |
| 20 } |
| 21 |
| 22 void WatcherSet::NotifyClosed() { |
| 23 for (const auto& entry : watchers_) |
| 24 entry.second->NotifyClosed(); |
| 25 } |
| 26 |
| 27 MojoResult WatcherSet::Add(MojoHandleSignals signals, |
| 28 const Watcher::WatchCallback& callback, |
| 29 uintptr_t context, |
| 30 const HandleSignalsState& current_state) { |
| 31 auto it = watchers_.find(context); |
| 32 if (it != watchers_.end()) |
| 33 return MOJO_RESULT_ALREADY_EXISTS; |
| 34 |
| 35 if (!current_state.can_satisfy(signals)) |
| 36 return MOJO_RESULT_FAILED_PRECONDITION; |
| 37 |
| 38 scoped_refptr<Watcher> watcher(new Watcher(signals, callback)); |
| 39 watchers_.insert(std::make_pair(context, watcher)); |
| 40 |
| 41 watcher->NotifyForStateChange(current_state); |
| 42 |
| 43 return MOJO_RESULT_OK; |
| 44 } |
| 45 |
| 46 MojoResult WatcherSet::Remove(uintptr_t context) { |
| 47 auto it = watchers_.find(context); |
| 48 if (it == watchers_.end()) |
| 49 return MOJO_RESULT_INVALID_ARGUMENT; |
| 50 |
| 51 RequestContext::current()->AddWatchCancelFinalizer(it->second); |
| 52 watchers_.erase(it); |
| 53 return MOJO_RESULT_OK; |
| 54 } |
| 55 |
| 56 } // namespace edk |
| 57 } // namespace mojo |
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