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.h"
6
7 #include "mojo/edk/system/handle_signals_state.h"
8 #include "mojo/edk/system/request_context.h"
9
10 namespace mojo {
11 namespace edk {
12
Watcher(MojoHandleSignals signals,const WatchCallback & callback)13 Watcher::Watcher(MojoHandleSignals signals, const WatchCallback& callback)
14 : signals_(signals), callback_(callback) {
15 }
16
MaybeInvokeCallback(MojoResult result,const HandleSignalsState & state,MojoWatchNotificationFlags flags)17 void Watcher::MaybeInvokeCallback(MojoResult result,
18 const HandleSignalsState& state,
19 MojoWatchNotificationFlags flags) {
20 base::AutoLock lock(lock_);
21 if (is_cancelled_)
22 return;
23
24 callback_.Run(result, state, flags);
25 }
26
NotifyForStateChange(const HandleSignalsState & signals_state)27 void Watcher::NotifyForStateChange(const HandleSignalsState& signals_state) {
28 RequestContext* request_context = RequestContext::current();
29 if (signals_state.satisfies(signals_)) {
30 request_context->AddWatchNotifyFinalizer(
31 make_scoped_refptr(this), MOJO_RESULT_OK, signals_state);
32 } else if (!signals_state.can_satisfy(signals_)) {
33 request_context->AddWatchNotifyFinalizer(
34 make_scoped_refptr(this), MOJO_RESULT_FAILED_PRECONDITION,
35 signals_state);
36 }
37 }
38
NotifyClosed()39 void Watcher::NotifyClosed() {
40 static const HandleSignalsState closed_state = {0, 0};
41 RequestContext::current()->AddWatchNotifyFinalizer(
42 make_scoped_refptr(this), MOJO_RESULT_CANCELLED, closed_state);
43 }
44
Cancel()45 void Watcher::Cancel() {
46 base::AutoLock lock(lock_);
47 is_cancelled_ = true;
48 }
49
~Watcher()50 Watcher::~Watcher() {}
51
52 } // namespace edk
53 } // namespace mojo
54