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// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
#include "element_impl.hpp"
#include <gras/block.hpp>
using namespace gras;
PropertyRegistry::PropertyRegistry(void){}
PropertyRegistry::~PropertyRegistry(void){}
/***********************************************************************
* The actual thread-safe implementation of property handling
**********************************************************************/
void BlockActor::handle_prop_access(
const PropAccessMessage &message,
const Theron::Address from
)
{
//setup reply
PropAccessMessage reply;
reply.set = not message.set;
reply.key = message.key;
//try to call the property bound method
PropertyRegistrySptr pr = prop_registry[message.key];
if (not pr) reply.error = "no property registered for key: " + message.key;
else try
{
if (message.set) pr->set(message.value);
else reply.value = pr->get();
}
catch (const std::exception &e)
{
reply.error = e.what();
}
catch (...)
{
reply.error = "unknown error";
}
//send the reply
this->Send(reply, from); //ACK
this->highPrioAck();
}
/***********************************************************************
* A special receiver to handle the property access result
**********************************************************************/
struct PropAccessReceiver : Theron::Receiver
{
PropAccessReceiver(void)
{
this->RegisterHandler(this, &PropAccessReceiver::handle_prop_access);
}
void handle_prop_access(const PropAccessMessage &msg, const Theron::Address)
{
this->message = msg;
}
PropAccessMessage message;
};
/***********************************************************************
* Handle the get and set calls from the user's call-stack
**********************************************************************/
PMCC BlockActor::prop_access_dispatcher(const std::string &key, const PMCC &value, const bool set)
{
PropAccessReceiver receiver;
PropAccessMessage message;
message.set = set;
message.key = key;
message.value = value;
this->Push(message, receiver.GetAddress());
this->highPrioPreNotify();
receiver.Wait();
if (not receiver.message.error.empty())
{
throw std::runtime_error(receiver.message.error);
}
return receiver.message.value;
}
void Block::_register_property(const std::string &key, PropertyRegistrySptr pr)
{
(*this)->block->prop_registry[key] = pr;
}
void Block::_set_property(const std::string &key, const PMCC &value)
{
(*this)->block->prop_access_dispatcher(key, value, true);
}
PMCC Block::_get_property(const std::string &key)
{
return (*this)->block->prop_access_dispatcher(key, PMCC(), false);
}
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