allocator.h

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#pragma once
 
#include <stddef.h>
 
#include "io/error.h"
#include "nostd.h"
#include "utility.h"
 
typedef cu_IoSlice_Result (*cu_Allocator_AllocFunc)(
    void *self, cu_Layout layout);
typedef cu_IoSlice_Result (*cu_Allocator_GrowFunc)(
    void *self, cu_Slice old_mem, cu_Layout new_layout);
typedef cu_IoSlice_Result (*cu_Allocator_ShrinkFunc)(
    void *self, cu_Slice old_mem, cu_Layout new_layout);
typedef void (*cu_Allocator_FreeFunc)(void *self, cu_Slice mem);
 
typedef struct {
  void *self;                       
  cu_Allocator_AllocFunc allocFn;    
  cu_Allocator_GrowFunc growFn;      
  cu_Allocator_ShrinkFunc shrinkFn;  
  cu_Allocator_FreeFunc freeFn;     
} cu_Allocator;
CU_OPTIONAL_DECL(cu_Allocator, cu_Allocator)
 
 
static inline cu_IoSlice_Result cu_Allocator_Alloc(
    cu_Allocator allocator, cu_Layout layout) {
  return allocator.allocFn(allocator.self, layout);
}
 
static inline cu_IoSlice_Result cu_Allocator_Grow(
    cu_Allocator allocator, cu_Slice old_mem, cu_Layout new_layout) {
  return allocator.growFn(allocator.self, old_mem, new_layout);
}
 
static inline cu_IoSlice_Result cu_Allocator_Shrink(
    cu_Allocator allocator, cu_Slice old_mem, cu_Layout new_layout) {
  return allocator.shrinkFn(allocator.self, old_mem, new_layout);
}
 
static inline void cu_Allocator_Free(cu_Allocator allocator, cu_Slice mem) {
  allocator.freeFn(allocator.self, mem);
}
 
#if !CU_FREESTANDING
cu_Allocator cu_Allocator_CAllocator(void);
#endif
 
cu_Allocator cu_Allocator_NullAllocator(void);