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/*
* Copyright 2019 by its authors. See AUTHORS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _EFL_ECORE_CXX_ECORE_MANUAL_HH
#define _EFL_ECORE_CXX_ECORE_MANUAL_HH
#include <Ecore.h>
#include <Eina.hh>
#include <utility>
#include <type_traits>
#include <memory>
#include <cstring>
namespace efl { namespace ecore {
template <typename T>
struct _identity
{
typedef T type;
};
template <typename F>
void _ecore_main_loop_thread_safe_call_async_callback(void* data)
{
std::unique_ptr<F> f (static_cast<F*>(data));
try
{
(*f)();
}
catch(std::bad_alloc const& e)
{
eina_error_set(ENOMEM);
}
catch(std::system_error const& e)
{
efl::eina::set_error_code(e.code());
}
catch(...)
{
eina_error_set( efl::eina::unknown_error() );
}
}
template <typename T>
struct _return_buffer
{
typename std::aligned_storage<sizeof(T),std::alignment_of<T>::value>::type buffer;
};
template <>
struct _return_buffer<void>
{
};
template <typename F>
struct _data
{
F& f;
std::exception_ptr exception;
typedef typename std::result_of<F()>::type result_type;
_return_buffer<result_type> return_buffer;
};
template <typename F>
void* _ecore_main_loop_thread_safe_call_sync_callback_aux(_data<F>* d, _identity<void>)
{
d->f();
if(eina_error_get())
d->exception = make_exception_ptr(std::system_error(efl::eina::get_error_code()));
return 0;
}
template <typename F, typename R>
void* _ecore_main_loop_thread_safe_call_sync_callback_aux(_data<F>* d, _identity<R>)
{
typedef R result_type;
new (&d->return_buffer.buffer) result_type ( std::move(d->f()) );
if(eina_error_get())
{
d->exception = make_exception_ptr(std::system_error(efl::eina::get_error_code()));
eina_error_set(0);
result_type* p = static_cast<result_type*>(static_cast<void*>(&d->return_buffer.buffer));
p->~result_type();
}
return 0;
}
template <typename F>
void* _ecore_main_loop_thread_safe_call_sync_callback(void* data)
{
_data<F>* d = static_cast<_data<F>*>(data);
try
{
return _ecore_main_loop_thread_safe_call_sync_callback_aux
(d, _identity<typename std::result_of<F()>::type>());
}
catch(std::bad_alloc const& e)
{
d->exception = std::current_exception();
}
catch(std::system_error const& e)
{
d->exception = std::current_exception();
}
catch(...)
{
d->exception = std::current_exception();
}
return 0;
}
template <typename F>
void main_loop_thread_safe_call_async(F&& f)
{
::ecore_main_loop_thread_safe_call_async( &ecore::_ecore_main_loop_thread_safe_call_async_callback<F>
, new F(std::forward<F>(f)) );
}
template <typename F>
void _get_return_value(_data<F>& data, _identity<void>)
{
if(data.exception)
{
std::rethrow_exception(data.exception);
}
}
template <typename F, typename R>
R _get_return_value(_data<F>& data, _identity<R>)
{
if(!data.exception)
{
R* b_ = static_cast<R*>(static_cast<void*>(&data.return_buffer.buffer));
struct destroy
{
destroy(R* x_) : p_(x_)
{}
~destroy()
{
p_->~R();
}
R* p_;
} destroy_temp(b_);
return std::move(*b_);
}
else
{
std::rethrow_exception(data.exception);
}
}
template <typename F>
typename std::result_of<F()>::type
main_loop_thread_safe_call_sync(F&& f)
{
typedef typename std::result_of<F()>::type result_type;
_data<F> data {f, nullptr, {}};
::ecore_main_loop_thread_safe_call_sync
(&ecore::_ecore_main_loop_thread_safe_call_sync_callback<F>, &data);
return _get_return_value(data, _identity<result_type>());
}
struct ecore_init
{
ecore_init()
{
::ecore_init();
}
~ecore_init()
{
::ecore_shutdown();
}
};
} }
#endif