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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
#include <atomic>
#include <string>
#include "BLI_string_ref.hh"
#include "BKE_anonymous_attribute.h"
namespace blender::bke {
template<bool IsStrongReference> class OwnedAnonymousAttributeID {
private:
const AnonymousAttributeID *data_ = nullptr;
public:
OwnedAnonymousAttributeID() = default;
explicit OwnedAnonymousAttributeID(StringRefNull debug_name)
{
if constexpr (IsStrongReference) {
data_ = BKE_anonymous_attribute_id_new_strong(debug_name.c_str());
}
else {
data_ = BKE_anonymous_attribute_id_new_weak(debug_name.c_str());
}
}
/* This transfers ownership, so no incref is necessary. */
explicit OwnedAnonymousAttributeID(const AnonymousAttributeID *anonymous_id)
: data_(anonymous_id)
{
}
template<bool OtherIsStrong>
OwnedAnonymousAttributeID(const OwnedAnonymousAttributeID<OtherIsStrong> &other)
{
data_ = other.data_;
this->incref();
}
template<bool OtherIsStrong>
OwnedAnonymousAttributeID(OwnedAnonymousAttributeID<OtherIsStrong> &&other)
{
data_ = other.data_;
this->incref();
other.decref();
other.data_ = nullptr;
}
~OwnedAnonymousAttributeID()
{
this->decref();
}
template<bool OtherIsStrong>
OwnedAnonymousAttributeID &operator=(const OwnedAnonymousAttributeID<OtherIsStrong> &other)
{
if (this == &other) {
return *this;
}
this->~OwnedAnonymousAttributeID();
new (this) OwnedAnonymousAttributeID(other);
return *this;
}
template<bool OtherIsStrong>
OwnedAnonymousAttributeID &operator=(OwnedAnonymousAttributeID<OtherIsStrong> &&other)
{
if (this == &other) {
return *this;
}
this->~OwnedAnonymousAttributeID();
new (this) OwnedAnonymousAttributeID(std::move(other));
return *this;
}
operator bool() const
{
return data_ != nullptr;
}
StringRefNull debug_name() const
{
BLI_assert(data_ != nullptr);
return BKE_anonymous_attribute_id_debug_name(data_);
}
bool has_strong_references() const
{
BLI_assert(data_ != nullptr);
return BKE_anonymous_attribute_id_has_strong_references(data_);
}
const AnonymousAttributeID *extract()
{
const AnonymousAttributeID *extracted_data = data_;
/* Don't decref because the caller becomes the new owner. */
data_ = nullptr;
return extracted_data;
}
private:
void incref()
{
if (data_ == nullptr) {
return;
}
if constexpr (IsStrongReference) {
BKE_anonymous_attribute_id_increment_strong(data_);
}
else {
BKE_anonymous_attribute_id_increment_weak(data_);
}
}
void decref()
{
if (data_ == nullptr) {
return;
}
if constexpr (IsStrongReference) {
BKE_anonymous_attribute_id_decrement_strong(data_);
}
else {
BKE_anonymous_attribute_id_decrement_weak(data_);
}
}
};
using StrongAnonymousAttributeID = OwnedAnonymousAttributeID<true>;
using WeakAnonymousAttributeID = OwnedAnonymousAttributeID<false>;
class AttributeIDRef {
private:
StringRef name_;
const AnonymousAttributeID *anonymous_id_ = nullptr;
public:
AttributeIDRef() = default;
AttributeIDRef(StringRef name) : name_(name)
{
}
AttributeIDRef(StringRefNull name) : name_(name)
{
}
AttributeIDRef(const char *name) : name_(name)
{
}
AttributeIDRef(const std::string &name) : name_(name)
{
}
/* The anonymous id is only borrowed, the caller has to keep a reference to it. */
AttributeIDRef(const AnonymousAttributeID *anonymous_id) : anonymous_id_(anonymous_id)
{
}
operator bool() const
{
return this->is_named() || this->is_anonymous();
}
bool is_named() const
{
return !name_.is_empty();
}
bool is_anonymous() const
{
return anonymous_id_ != nullptr;
}
StringRef name() const
{
BLI_assert(this->is_named());
return name_;
}
const AnonymousAttributeID &anonymous_id() const
{
BLI_assert(this->is_anonymous());
return *anonymous_id_;
}
};
} // namespace blender::bke
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