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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/edk/system/watcher.h"
#include "mojo/edk/system/handle_signals_state.h"
#include "mojo/edk/system/request_context.h"
namespace mojo {
namespace edk {
Watcher::Watcher(MojoHandleSignals signals, const WatchCallback& callback)
: signals_(signals), callback_(callback) {
}
void Watcher::MaybeInvokeCallback(MojoResult result,
const HandleSignalsState& state) {
base::AutoLock lock(lock_);
if (is_cancelled_)
return;
callback_.Run(result, state);
}
void Watcher::NotifyForStateChange(const HandleSignalsState& signals_state) {
RequestContext* request_context = RequestContext::current();
if (signals_state.satisfies(signals_)) {
request_context->AddWatchNotifyFinalizer(
make_scoped_refptr(this), MOJO_RESULT_OK, signals_state);
} else if (!signals_state.can_satisfy(signals_)) {
request_context->AddWatchNotifyFinalizer(make_scoped_refptr(this),
MOJO_RESULT_FAILED_PRECONDITION,
signals_state);
}
}
void Watcher::NotifyClosed() {
static const HandleSignalsState closed_state = {0, 0};
RequestContext::current()->AddWatchNotifyFinalizer(
make_scoped_refptr(this), MOJO_RESULT_CANCELLED, closed_state);
}
void Watcher::Cancel() {
base::AutoLock lock(lock_);
is_cancelled_ = true;
}
Watcher::~Watcher() {}
} // namespace edk
} // namespace mojo
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