src/arch/arm/fastmodel/common/signal_receiver.hh

   1 /*
   2  * Copyright 2019 Google, Inc.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met: redistributions of source code must retain the above copyright
   7  * notice, this list of conditions and the following disclaimer;
   8  * redistributions in binary form must reproduce the above copyright
   9  * notice, this list of conditions and the following disclaimer in the
  10  * documentation and/or other materials provided with the distribution;
  11  * neither the name of the copyright holders nor the names of its
  12  * contributors may be used to endorse or promote products derived from
  13  * this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef __ARCH_ARM_FASTMODEL_COMMON_SIGNAL_RECEIVER_HH__
  29 #define __ARCH_ARM_FASTMODEL_COMMON_SIGNAL_RECEIVER_HH__
  30
  31 #pragma GCC diagnostic push
  32 #pragma GCC diagnostic ignored "-Woverloaded-virtual"
  33 #include <amba_pv.h>
  34 #pragma GCC diagnostic pop
  35
  36 #include <functional>
  37
  38 namespace FastModel
  39 {
  40
  41 class SignalReceiver : public amba_pv::signal_slave_base<bool>
  42 {
  43   public:
  44     typedef std::function<void(bool)> OnChangeFunc;
  45
  46   private:
  47     bool _state;
  48     OnChangeFunc _onChange;
  49
  50   public:
  51     amba_pv::signal_slave_export<bool> signal_in;
  52
  53     SignalReceiver(const std::string &name, OnChangeFunc on_change=nullptr) :
  54         SignalReceiver(name.c_str(), on_change)
  55     {}
  56
  57     SignalReceiver(const char *name, OnChangeFunc on_change=nullptr) :
  58         amba_pv::signal_slave_base<bool>(name),
  59         _state(false), _onChange(on_change)
  60     {
  61         signal_in.bind(*this);
  62     }
  63
  64     void onChange(OnChangeFunc func) { _onChange = func; }
  65
  66     void
  67     set_state(int export_id, const bool &new_state) override
  68     {
  69         if (new_state == _state)
  70             return;
  71
  72         _state = new_state;
  73         _onChange(_state);
  74     }
  75 };
  76
  77 } // namespace FastModel
  78
  79 #endif // __ARCH_ARM_FASTMODEL_COMMON_SIGNAL_RECEIVER_HH__