2019-10-24 06:36:42 -07:00
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/*
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* Copyright 2019 by its authors. See AUTHORS.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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2016-08-07 12:52:48 -07:00
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#ifndef _EFL_ECORE_CXX_ECORE_MANUAL_HH
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#define _EFL_ECORE_CXX_ECORE_MANUAL_HH
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#include <Ecore.h>
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#include <Eina.hh>
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#include <utility>
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#include <type_traits>
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#include <memory>
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#include <cstring>
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namespace efl { namespace ecore {
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template <typename T>
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struct _identity
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{
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typedef T type;
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};
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template <typename F>
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void _ecore_main_loop_thread_safe_call_async_callback(void* data)
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{
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std::unique_ptr<F> f (static_cast<F*>(data));
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try
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{
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(*f)();
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}
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catch(std::bad_alloc const& e)
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{
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2016-09-13 20:55:51 -07:00
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eina_error_set(ENOMEM);
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2016-08-07 12:52:48 -07:00
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}
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catch(std::system_error const& e)
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{
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efl::eina::set_error_code(e.code());
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}
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catch(...)
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{
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eina_error_set( efl::eina::unknown_error() );
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}
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}
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template <typename T>
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struct _return_buffer
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{
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typename std::aligned_storage<sizeof(T),std::alignment_of<T>::value>::type buffer;
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};
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template <>
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struct _return_buffer<void>
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{
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};
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template <typename F>
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struct _data
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{
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F& f;
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std::exception_ptr exception;
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typedef typename std::result_of<F()>::type result_type;
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_return_buffer<result_type> return_buffer;
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};
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template <typename F>
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void* _ecore_main_loop_thread_safe_call_sync_callback_aux(_data<F>* d, _identity<void>)
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{
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d->f();
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if(eina_error_get())
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d->exception = make_exception_ptr(std::system_error(efl::eina::get_error_code()));
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return 0;
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}
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template <typename F, typename R>
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void* _ecore_main_loop_thread_safe_call_sync_callback_aux(_data<F>* d, _identity<R>)
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{
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typedef R result_type;
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new (&d->return_buffer.buffer) result_type ( std::move(d->f()) );
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if(eina_error_get())
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{
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d->exception = make_exception_ptr(std::system_error(efl::eina::get_error_code()));
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eina_error_set(0);
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result_type* p = static_cast<result_type*>(static_cast<void*>(&d->return_buffer.buffer));
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p->~result_type();
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}
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return 0;
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}
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template <typename F>
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void* _ecore_main_loop_thread_safe_call_sync_callback(void* data)
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{
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_data<F>* d = static_cast<_data<F>*>(data);
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try
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{
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return _ecore_main_loop_thread_safe_call_sync_callback_aux
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(d, _identity<typename std::result_of<F()>::type>());
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}
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catch(std::bad_alloc const& e)
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{
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d->exception = std::current_exception();
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}
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catch(std::system_error const& e)
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{
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d->exception = std::current_exception();
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}
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catch(...)
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{
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d->exception = std::current_exception();
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}
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return 0;
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}
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template <typename F>
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void main_loop_thread_safe_call_async(F&& f)
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{
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::ecore_main_loop_thread_safe_call_async( &ecore::_ecore_main_loop_thread_safe_call_async_callback<F>
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, new F(std::forward<F>(f)) );
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}
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template <typename F>
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void _get_return_value(_data<F>& data, _identity<void>)
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{
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if(data.exception)
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{
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std::rethrow_exception(data.exception);
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}
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}
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template <typename F, typename R>
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R _get_return_value(_data<F>& data, _identity<R>)
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{
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if(!data.exception)
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{
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R* b_ = static_cast<R*>(static_cast<void*>(&data.return_buffer.buffer));
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struct destroy
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{
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destroy(R* x_) : p_(x_)
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{}
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~destroy()
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{
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p_->~R();
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}
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R* p_;
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} destroy_temp(b_);
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return std::move(*b_);
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}
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else
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{
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std::rethrow_exception(data.exception);
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}
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}
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template <typename F>
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typename std::result_of<F()>::type
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main_loop_thread_safe_call_sync(F&& f)
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{
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typedef typename std::result_of<F()>::type result_type;
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_data<F> data {f, nullptr, {}};
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::ecore_main_loop_thread_safe_call_sync
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(&ecore::_ecore_main_loop_thread_safe_call_sync_callback<F>, &data);
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return _get_return_value(data, _identity<result_type>());
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}
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struct ecore_init
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{
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ecore_init()
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{
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::ecore_init();
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}
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~ecore_init()
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{
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::ecore_shutdown();
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}
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};
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} }
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#endif
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