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_SYSTEM_HANDLE_SIGNALS_STATE_H_
6#define MOJO_SYSTEM_HANDLE_SIGNALS_STATE_H_
7
8#include "base/macros.h"
9#include "mojo/public/c/system/types.h"
10#include "mojo/system/system_impl_export.h"
11
12namespace mojo {
13namespace system {
14
15// Just "add" some constructors and methods to the C struct
16// |MojoHandleSignalsState| (for convenience). This should add no overhead.
17struct MOJO_SYSTEM_IMPL_EXPORT HandleSignalsState
18    : public MojoHandleSignalsState {
19  HandleSignalsState() {
20    satisfied_signals = MOJO_HANDLE_SIGNAL_NONE;
21    satisfiable_signals = MOJO_HANDLE_SIGNAL_NONE;
22  }
23  HandleSignalsState(MojoHandleSignals satisfied,
24                     MojoHandleSignals satisfiable) {
25    satisfied_signals = satisfied;
26    satisfiable_signals = satisfiable;
27  }
28
29  bool equals(const HandleSignalsState& other) const {
30    return satisfied_signals == other.satisfied_signals &&
31           satisfiable_signals == other.satisfiable_signals;
32  }
33
34  bool satisfies(MojoHandleSignals signals) const {
35    return !!(satisfied_signals & signals);
36  }
37
38  bool can_satisfy(MojoHandleSignals signals) const {
39    return !!(satisfiable_signals & signals);
40  }
41
42  // (Copy and assignment allowed.)
43};
44static_assert(sizeof(HandleSignalsState) == sizeof(MojoHandleSignalsState),
45              "HandleSignalsState should add no overhead");
46
47}  // namespace system
48}  // namespace mojo
49
50#endif  // MOJO_SYSTEM_HANDLE_SIGNALS_STATE_H_
51