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#pragma once
#include "deimos/core/base.h"
#include "deimos/core/id_name.h"
namespace deimos
{
struct MemoryScope { uint32 id; };
struct IAllocator
{
IAllocator() = default;
deimos_NO_COPY_MOVE(IAllocator);
virtual ~IAllocator() = default;
[[nodiscard]]
virtual void* Reallocate(
void* old_ptr, int64 old_size, int64 new_size,
MemoryScope scope, const SourceLocation& source_location = {}) = 0;
};
class Allocator
{
IAllocator* m_allocator;
const MemoryScope m_scope;
public:
constexpr explicit Allocator(IAllocator* allocator, MemoryScope scope) :
m_allocator{allocator}, m_scope{scope}
{}
deimos_NO_COPY_MOVE(Allocator);
~Allocator() = default;
[[nodiscard]]
constexpr void* Allocate(
int64 new_size,
const SourceLocation& source_location = {})
{
return m_allocator->Reallocate(nullptr, 0, new_size, m_scope, source_location);
}
[[nodiscard]]
void* Reallocate(
void* old_ptr, int64 old_size, int64 new_size,
const SourceLocation& source_location = {})
{
return m_allocator->Reallocate(old_ptr, old_size, new_size, m_scope, source_location);
}
constexpr void Free(
void* old_ptr, int64 old_size,
const SourceLocation& source_location = {})
{
(void)m_allocator->Reallocate(old_ptr, old_size, 0, m_scope, source_location);
}
template<typename T, typename... Args>
T* NewInner(
const SourceLocation& source_location,
Args&&... args)
{
void* ptr = Allocate(sizeof(T), source_location);
return new(ptr) T(std::forward<Args>(args)...);
}
template<typename T>
constexpr T* New(const SourceLocation& source_location = {})
{
return NewInner<T>(source_location);
}
template<typename T, typename A0>
constexpr T* New(A0&& arg0, const SourceLocation& source_location = {})
{
return NewInner<T>(source_location, std::forward<A0>(arg0));
}
template<typename T, typename A0, typename A1>
constexpr T* New(
A0&& arg0, A1&& arg1,
const SourceLocation& source_location = {})
{
return NewInner<T>(source_location,
std::forward<A0>(arg0),
std::forward<A1>(arg1));
}
template<typename T, typename A0, typename A1, typename A2>
constexpr T* New(
A0&& arg0, A1&& arg1, A2&& arg2,
const SourceLocation& source_location = {})
{
return NewInner<T>(source_location,
std::forward<A0>(arg0),
std::forward<A1>(arg1),
std::forward<A2>(arg2));
}
template<typename T, typename A0, typename A1, typename A2, typename A3>
constexpr T* New(
A0&& arg0, A1&& arg1, A2&& arg2, A3&& arg3,
const SourceLocation& source_location = {})
{
return NewInner<T>(source_location,
std::forward<A0>(arg0),
std::forward<A1>(arg1),
std::forward<A2>(arg2),
std::forward<A3>(arg3));
}
template<typename T>
void Delete(T* t, const SourceLocation& source_location = {})
{
if constexpr (!kIsTriviallyDestructible<T>)
{
t->~T();
}
Free(t, sizeof(T), source_location);
}
};
class AllocatorApi
{
public:
AllocatorApi() = default;
deimos_NO_COPY_MOVE(AllocatorApi);
virtual ~AllocatorApi() = default;
static constexpr IdName kApiName{"deimos::AllocatorApi"};
Allocator* system{};
virtual Allocator* CreateChild(Allocator* parent, const char* description) = 0;
virtual void DestroyChild(Allocator*) = 0;
};
} // namespace deimos
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