/usr/include/oneapi/tbb/detail
Edit: /usr/include/oneapi/tbb/detail/_node_handle.h (5173B)
/*
Copyright (c) 2019-2021 Intel Corporation
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 __TBB_detail__node_handle_H
#define __TBB_detail__node_handle_H
#include "_allocator_traits.h"
#include "_assert.h"
namespace tbb {
namespace detail {
namespace d1 {
// A structure to access private node handle methods in internal TBB classes
// Regular friend declaration is not convenient because classes which use node handle
// can be placed in the different versioning namespaces.
struct node_handle_accessor {
template
static typename NodeHandleType::node* get_node_ptr( NodeHandleType& nh ) {
return nh.get_node_ptr();
}
template
static NodeHandleType construct( typename NodeHandleType::node* node_ptr ) {
return NodeHandleType{node_ptr};
}
template
static void deactivate( NodeHandleType& nh ) {
nh.deactivate();
}
}; // struct node_handle_accessor
template
class node_handle_base {
public:
using allocator_type = Allocator;
protected:
using node = Node;
using allocator_traits_type = tbb::detail::allocator_traits;
public:
node_handle_base() : my_node(nullptr), my_allocator() {}
node_handle_base(node_handle_base&& nh) : my_node(nh.my_node),
my_allocator(std::move(nh.my_allocator)) {
nh.my_node = nullptr;
}
__TBB_nodiscard bool empty() const { return my_node == nullptr; }
explicit operator bool() const { return my_node != nullptr; }
~node_handle_base() { internal_destroy(); }
node_handle_base& operator=( node_handle_base&& nh ) {
internal_destroy();
my_node = nh.my_node;
move_assign_allocators(my_allocator, nh.my_allocator);
nh.deactivate();
return *this;
}
void swap( node_handle_base& nh ) {
using std::swap;
swap(my_node, nh.my_node);
swap_allocators(my_allocator, nh.my_allocator);
}
allocator_type get_allocator() const {
return my_allocator;
}
protected:
node_handle_base( node* n ) : my_node(n) {}
void internal_destroy() {
if(my_node != nullptr) {
allocator_traits_type::destroy(my_allocator, my_node->storage());
typename allocator_traits_type::template rebind_alloc node_allocator(my_allocator);
node_allocator.deallocate(my_node, 1);
}
}
node* get_node_ptr() { return my_node; }
void deactivate() { my_node = nullptr; }
node* my_node;
allocator_type my_allocator;
};
// node handle for maps
template
class node_handle : public node_handle_base {
using base_type = node_handle_base;
public:
using key_type = Key;
using mapped_type = typename Value::second_type;
using allocator_type = typename base_type::allocator_type;
node_handle() = default;
key_type& key() const {
__TBB_ASSERT(!this->empty(), "Cannot get key from the empty node_type object");
return *const_cast(&(this->my_node->value().first));
}
mapped_type& mapped() const {
__TBB_ASSERT(!this->empty(), "Cannot get mapped value from the empty node_type object");
return this->my_node->value().second;
}
private:
friend struct node_handle_accessor;
node_handle( typename base_type::node* n ) : base_type(n) {}
}; // class node_handle
// node handle for sets
template
class node_handle : public node_handle_base {
using base_type = node_handle_base;
public:
using value_type = Key;
using allocator_type = typename base_type::allocator_type;
node_handle() = default;
value_type& value() const {
__TBB_ASSERT(!this->empty(), "Cannot get value from the empty node_type object");
return *const_cast(&(this->my_node->value()));
}
private:
friend struct node_handle_accessor;
node_handle( typename base_type::node* n ) : base_type(n) {}
}; // class node_handle
template
void swap( node_handle& lhs,
node_handle& rhs ) {
return lhs.swap(rhs);
}
} // namespace d1
} // namespace detail
} // namespace tbb
#endif // __TBB_detail__node_handle_H