mem.h

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#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define __UCONCAT(a, b) #a b
#define _UCONCAT(a, b) __UCONCAT(a, b)
#define UCONCAT(b) _UCONCAT(__USER_LABEL_PREFIX__, b)
 
#include <stdint.h>
#include <stddef.h>
 
struct Mem_FreeListBlock {
    size_t size;
    struct Mem_FreeListBlock *next;
};
 
static void * const heap_start = (void *)0x8c280000;
static const
#ifdef __cplusplus
constexpr
#endif
size_t heap_size = 12 * 1024 * 1024; // 12MB
static void * const heap_end = (void *)0x8ce80000;
 
extern struct Mem_FreeListBlock ** const free_list_head;
 
extern void (*Mem_Free)(void *ptr);
 
extern void *(*_FP_Mem_Malloc)(size_t size) __asm__ (UCONCAT("Mem_Malloc")) __attribute__((alloc_size(1), warn_unused_result));
 
static void *Mem_Malloc(size_t size) __asm__ (UCONCAT("Mem_Malloc_Wrapper")) __attribute__((malloc, alloc_size(1), assume_aligned(4), unused, warn_unused_result));
void *Mem_Malloc(size_t size) {
    return _FP_Mem_Malloc(size);
}
 
extern void *(*Mem_Memcpy)(void *destination, const void *source, size_t num)
#ifndef __clang__
__attribute__((access(read_only, 2, 3), access(write_only, 1, 3)))
#endif
;
 
extern void *(*Mem_Memset)(void *ptr, int value, size_t num)
#ifndef __clang__
__attribute__((access(write_only, 1, 3)))
#endif
;
 
extern void *(*Mem_Sbrk)(long size);
 
extern signed char (*Mem_SbrkMode)(signed char newMode);
 
#ifdef __cplusplus
}
#endif