methodproxybase.h

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// SPDX-License-Identifier: LGPL-3.0-or-later OR BSD-3-Clause
/***************************************************************************
 *   Copyright (C) 2009,2010 by Rick L. Vinyard, Jr.                       *
 *   rvinyard@cs.nmsu.edu                                                  *
 *   Copyright (C) 2019 by Robert Middleton                                *
 *   robert.middleton@rm5248.com                                           *
 *                                                                         *
 *   This file is part of the dbus-cxx library.                            *
 ***************************************************************************/
#include <dbus-cxx/callmessage.h>
#include <dbus-cxx/headerlog.h>
#include <dbus-cxx/utility.h>
#include <memory>
#include <mutex>
#include <string>
#include <sstream>
#include "messageappenditerator.h"
#include <sigc++/sigc++.h>
#include <future>
 
#ifndef DBUSCXX_METHODPROXYBASE_H
#define DBUSCXX_METHODPROXYBASE_H
 
namespace DBus {
 
class InterfaceProxy;
class PendingCall;
class ReturnMessage;
template <typename signature> class MethodProxy;
 
class MethodProxyBase {
protected:
 
    MethodProxyBase( const std::string& name );
 
    MethodProxyBase( const MethodProxyBase& other );
 
public:
    static std::shared_ptr<MethodProxyBase> create( const std::string& name );
 
    ~MethodProxyBase();
 
    InterfaceProxy* interface_name() const;
 
    const std::string& name() const;
 
    std::shared_ptr<CallMessage> create_call_message( ) const;
 
    std::shared_ptr<const ReturnMessage> call( std::shared_ptr<const CallMessage>, int timeout_milliseconds = -1 ) const;
 
    //      std::shared_ptr<PendingCall> call_async( std::shared_ptr<const CallMessage>, int timeout_milliseconds=-1 ) const;
 
private:
    void set_interface( InterfaceProxy* proxy );
 
private:
    class priv_data;
 
    DBUS_CXX_PROPAGATE_CONST( std::unique_ptr<priv_data> ) m_priv;
 
    // Declare InterfaceProxy as a friend so that it can set the interface
    friend class InterfaceProxy;
};
 
 
template<typename... T_arg>
class MethodProxy<void( T_arg... )> : public MethodProxyBase {
protected:
    MethodProxy( const std::string& name ) :
        MethodProxyBase( name ) {}
 
public:
    void operator()( T_arg... args ) {
        std::ostringstream debug_str;
        DBus::priv::dbus_function_traits<std::function<void( T_arg... )>> method_sig_gen;
 
        debug_str << "DBus::MethodProxy<";
        debug_str << method_sig_gen.debug_string();
        debug_str << "> calling method=";
        debug_str << name();
        DBUSCXX_DEBUG_STDSTR( "DBus.MethodProxy", debug_str.str() );
 
        std::shared_ptr<CallMessage> _callmsg = this->create_call_message();
        ( *_callmsg << ... << args );
        std::shared_ptr<const ReturnMessage> retmsg = this->call( _callmsg, -1 );
    }
 
    std::future<void> call_async( T_arg... args ) {
        std::ostringstream debug_str;
        DBus::priv::dbus_function_traits<std::function<void( T_arg... )>> method_sig_gen;
 
        debug_str << "DBus::MethodProxy<";
        debug_str << method_sig_gen.debug_string();
        debug_str << "> calling async method=";
        debug_str << name();
        DBUSCXX_DEBUG_STDSTR( "DBus.MethodProxy", debug_str.str() );
 
        return std::async( std::launch::async, *this, args... );
    }
 
    static std::shared_ptr<MethodProxy> create( const std::string& name ) {
        return std::shared_ptr<MethodProxy>( new MethodProxy( name ) );
    }
};
 
template<typename T_return, typename... T_arg>
class MethodProxy<T_return( T_arg... )> : public MethodProxyBase {
protected:
    MethodProxy( const std::string& name ) :
        MethodProxyBase( name ) {}
 
public:
    T_return operator()( T_arg... args ) {
        std::ostringstream debug_str;
        DBus::priv::dbus_function_traits<std::function<T_return( T_arg... )>> method_sig_gen;
 
        debug_str << "DBus::MethodProxy<";
        debug_str << method_sig_gen.debug_string();
        debug_str << "> calling method=";
        debug_str << name();
        DBUSCXX_DEBUG_STDSTR( "DBus.MethodProxy", debug_str.str() );
 
        std::shared_ptr<CallMessage> _callmsg = this->create_call_message();
        MessageAppendIterator iter = _callmsg->append();
        ( void )( iter << ... << args );
        std::shared_ptr<const ReturnMessage> retmsg = this->call( _callmsg, -1 );
        T_return _retval;
        retmsg >> _retval;
        return _retval;
    }
 
    std::future<T_return> call_async( T_arg... args ) {
        std::ostringstream debug_str;
        DBus::priv::dbus_function_traits<std::function<void( T_arg... )>> method_sig_gen;
 
        debug_str << "DBus::MethodProxy<";
        debug_str << method_sig_gen.debug_string();
        debug_str << "> calling async method=";
        debug_str << name();
        DBUSCXX_DEBUG_STDSTR( "DBus.MethodProxy", debug_str.str() );
 
        return std::async( std::launch::async, *this, args... );
    }
 
    static std::shared_ptr<MethodProxy> create( const std::string& name ) {
        return std::shared_ptr<MethodProxy>( new MethodProxy( name ) );
    }
};
 
}
 
#endif