mgl_memory_allocator.h

[詳解]

// SPDX-License-Identifier: Zlib
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
 
#ifndef INCGUARD_MGL_MEMORY_ALLOCATOR_H_1651231310
#define INCGUARD_MGL_MEMORY_ALLOCATOR_H_1651231310
 
#include <cstddef>
#include <cstdint>
 
#include <mgl/hash/mgl_hash_fnv1a.h>
 
namespace MGL::Memory
{
 
enum class AllocatorType : uint32_t;
 
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
constexpr AllocatorType MakeAllocatorType(const char *key) noexcept
{
    return static_cast<AllocatorType>(Hash::FNV1a(key));
}
 
constexpr AllocatorType kInvalidAllocatorType = MakeAllocatorType("MGL-InvalidAllocator");
 
class Allocator
{
public:
    virtual ~Allocator() = default;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] virtual AllocatorType GetType() const noexcept = 0;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    virtual bool Initialize() noexcept = 0;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] virtual bool IsInitialized() const noexcept = 0;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] virtual void *Allocate(size_t size) noexcept = 0;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    virtual void Deallocate(void *buffer) noexcept = 0;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    virtual bool GetSizeInfo(size_t &dest, uint32_t key, uint32_t arg) noexcept = 0;
};
}    // namespace MGL::Memory
 
#endif    // INCGUARD_MGL_MEMORY_ALLOCATOR_H_1651231310
 
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