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source/EventQueue/detail/Thunk.impl.h@0:1c7da5f83647, 2016-11-29 (annotated)

Committer:
sarahmarshy
Date:
Tue Nov 29 06:29:10 2016 +0000
Revision:
0:1c7da5f83647
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sarahmarshy 0:1c7da5f83647 1 /*
sarahmarshy 0:1c7da5f83647 2 * Copyright (c) 2016, ARM Limited, All Rights Reserved
sarahmarshy 0:1c7da5f83647 3 * SPDX-License-Identifier: Apache-2.0
sarahmarshy 0:1c7da5f83647 4 *
sarahmarshy 0:1c7da5f83647 5 * Licensed under the Apache License, Version 2.0 (the "License"); you may
sarahmarshy 0:1c7da5f83647 6 * not use this file except in compliance with the License.
sarahmarshy 0:1c7da5f83647 7 * You may obtain a copy of the License at
sarahmarshy 0:1c7da5f83647 8 *
sarahmarshy 0:1c7da5f83647 9 * http://www.apache.org/licenses/LICENSE-2.0
sarahmarshy 0:1c7da5f83647 10 *
sarahmarshy 0:1c7da5f83647 11 * Unless required by applicable law or agreed to in writing, software
sarahmarshy 0:1c7da5f83647 12 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
sarahmarshy 0:1c7da5f83647 13 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sarahmarshy 0:1c7da5f83647 14 * See the License for the specific language governing permissions and
sarahmarshy 0:1c7da5f83647 15 * limitations under the License.
sarahmarshy 0:1c7da5f83647 16 */
sarahmarshy 0:1c7da5f83647 17 #ifndef EVENTQUEUE_DETAIL_THUNK_IMPL_H_
sarahmarshy 0:1c7da5f83647 18 #define EVENTQUEUE_DETAIL_THUNK_IMPL_H_
sarahmarshy 0:1c7da5f83647 19
sarahmarshy 0:1c7da5f83647 20 #include <new>
sarahmarshy 0:1c7da5f83647 21 #include "ThunkVTableGenerator.h"
sarahmarshy 0:1c7da5f83647 22
sarahmarshy 0:1c7da5f83647 23 namespace eq {
sarahmarshy 0:1c7da5f83647 24
sarahmarshy 0:1c7da5f83647 25 /**
sarahmarshy 0:1c7da5f83647 26 * Thunk constructor Implementation.
sarahmarshy 0:1c7da5f83647 27 * Due to the way templates and forwarding work in C++, it was not possible to
sarahmarshy 0:1c7da5f83647 28 * provide this implementation in Thunk.h
sarahmarshy 0:1c7da5f83647 29 */
sarahmarshy 0:1c7da5f83647 30 template<typename F>
sarahmarshy 0:1c7da5f83647 31 Thunk::Thunk(const F& f) :
sarahmarshy 0:1c7da5f83647 32 _storage(),
sarahmarshy 0:1c7da5f83647 33 _vtable(&detail::ThunkVTableGenerator<F>::vtable) {
sarahmarshy 0:1c7da5f83647 34 typedef __attribute__((unused)) char F_is_too_big_for_the_Thunk[sizeof(F) <= sizeof(_storage) ? 1 : -1];
sarahmarshy 0:1c7da5f83647 35 new(_storage.get_storage(0)) F(f);
sarahmarshy 0:1c7da5f83647 36 }
sarahmarshy 0:1c7da5f83647 37
sarahmarshy 0:1c7da5f83647 38 /**
sarahmarshy 0:1c7da5f83647 39 * Specialization for function pointers.
sarahmarshy 0:1c7da5f83647 40 * This overload will be chosen when the tyope in input is a reference to a function.
sarahmarshy 0:1c7da5f83647 41 * @param f The function to transform in Thunk.
sarahmarshy 0:1c7da5f83647 42 */
sarahmarshy 0:1c7da5f83647 43 inline Thunk::Thunk(void (*f)()) :
sarahmarshy 0:1c7da5f83647 44 _storage(),
sarahmarshy 0:1c7da5f83647 45 _vtable(&detail::ThunkVTableGenerator<void(*)()>::vtable) {
sarahmarshy 0:1c7da5f83647 46 typedef void(*F)();
sarahmarshy 0:1c7da5f83647 47 typedef __attribute__((unused)) char F_is_too_big_for_the_Thunk[sizeof(F) <= sizeof(_storage) ? 1 : -1];
sarahmarshy 0:1c7da5f83647 48 new(_storage.get_storage(0)) F(f);
sarahmarshy 0:1c7da5f83647 49 }
sarahmarshy 0:1c7da5f83647 50
sarahmarshy 0:1c7da5f83647 51 /**
sarahmarshy 0:1c7da5f83647 52 * Thunk empty constructor Implementation.
sarahmarshy 0:1c7da5f83647 53 * Due to the way templates and forwarding work in C++, it was not possible to
sarahmarshy 0:1c7da5f83647 54 * provide this implementation in Thunk.h
sarahmarshy 0:1c7da5f83647 55 */
sarahmarshy 0:1c7da5f83647 56 inline Thunk::Thunk() :
sarahmarshy 0:1c7da5f83647 57 _storage(),
sarahmarshy 0:1c7da5f83647 58 _vtable(&detail::ThunkVTableGenerator<void(*)()>::vtable) {
sarahmarshy 0:1c7da5f83647 59 typedef void(*F)();
sarahmarshy 0:1c7da5f83647 60 typedef __attribute__((unused)) char F_is_too_big_for_the_Thunk[sizeof(F) <= sizeof(_storage) ? 1 : -1];
sarahmarshy 0:1c7da5f83647 61 new(_storage.get_storage(0)) F(empty_thunk);
sarahmarshy 0:1c7da5f83647 62 }
sarahmarshy 0:1c7da5f83647 63
sarahmarshy 0:1c7da5f83647 64 } // namespace eq
sarahmarshy 0:1c7da5f83647 65
sarahmarshy 0:1c7da5f83647 66 #endif /* EVENTQUEUE_DETAIL_THUNK_IMPL_H_ */