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