mem/include/mem.h

#ifndef MEM_INCLUDED
#define MEM_INCLUDED

#include "except.h"
#include <stddef.h>

#define sizeof(x)    (ptrdiff_t)sizeof(x)
#define NELEMS(a)   (sizeof(a) / sizeof(*(a)))
#define LEN(s)  (NELEMS(s) - 1)
#define KB(x) ((ptrdiff_t)(x) << 10)  // 1 KB = 1024 bytes
#define MB(x) ((ptrdiff_t)(x) << 20)  // 1 MB = 1024 * 1024 bytes
#define GB(x) ((ptrdiff_t)(x) << 30)  // 1 GB = 1024 * 1024 * 1024 bytes

typedef enum {
    SOFTFAIL = 0x1,
} MemFlags;

extern const Exception out_of_memory; // OOM Exception 

extern void *mem_alloc (ptrdiff_t nbytes, const char *file, int line, int flags);
extern void *mem_calloc(ptrdiff_t count, ptrdiff_t nbytes, const char *file, int line, int flags);
extern void mem_free(void *ptr, const char *file, int line);
extern void *mem_realloc(void *ptr, ptrdiff_t nbytes, const char *file, int line, int flags);

#define ALLOC(nbytes,flags) \
    mem_alloc((nbytes), __FILE__, __LINE__, flags)

#define CALLOC(count, nbytes, flags) \
    mem_calloc((count), (nbytes), __FILE__, __LINE__, flags)

#define NEW(p,flags) \
    ((p) = ALLOC((ptrdiff_t)sizeof *(p), flags))

#define NEW0(p,flags) \
    ((p) = CALLOC(1, (ptrdiff_t)sizeof *(p), flags))

#define FREE(ptr) \
    ((void)(mem_free((ptr), __FILE__, __LINE__), (ptr) = 0))

#define REALLOC(ptr, nbytes, flags) \
    ((ptr) = mem_realloc((ptr), (nbytes), __FILE__, __LINE__, flags))

#endif