#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "py/mpconfig.h"

#include "py/misc.h"

#include "py/mpstate.h"

#if 0 // print debugging info

#define DEBUG_printf DEBUG_printf

#else // don't print debugging info

#define DEBUG_printf(...) (void)0

#if MICROPY_MEM_STATS

#define UPDATE_PEAK() { if (MP_STATE_MEM(current_bytes_allocated) > MP_STATE_MEM(peak_bytes_allocated)) MP_STATE_MEM(peak_bytes_allocated) = MP_STATE_MEM(current_bytes_allocated); }

#if MICROPY_ENABLE_GC

#include "py/gc.h"

#undef malloc

#undef free

#undef realloc

#define malloc(b) gc_alloc((b), false)

#define malloc_with_finaliser(b) gc_alloc((b), true)

#define free gc_free

#define realloc(ptr, n) gc_realloc(ptr, n, true)

#define realloc_ext(ptr, n, mv) gc_realloc(ptr, n, mv)

STATIC void *realloc_ext(void *ptr, size_t n_bytes, bool allow_move) {

if (allow_move) {

return realloc(ptr, n_bytes);

} else {

// We are asked to resize, but without moving the memory region pointed to

// by ptr. Unless the underlying memory manager has special provision for

// this behaviour there is nothing we can do except fail to resize.

return NULL;

}

}

#endif // MICROPY_ENABLE_GC

void *m_malloc(size_t num_bytes) {

void *ptr = malloc(num_bytes);

if (ptr == NULL && num_bytes != 0) {

return m_malloc_fail(num_bytes);

}

#if MICROPY_MEM_STATS

MP_STATE_MEM(total_bytes_allocated) += num_bytes;

MP_STATE_MEM(current_bytes_allocated) += num_bytes;

UPDATE_PEAK();

DEBUG_printf("malloc %d : %p\n", num_bytes, ptr);

return ptr;

}

void *m_malloc_maybe(size_t num_bytes) {

void *ptr = malloc(num_bytes);

#if MICROPY_MEM_STATS

MP_STATE_MEM(total_bytes_allocated) += num_bytes;

MP_STATE_MEM(current_bytes_allocated) += num_bytes;

UPDATE_PEAK();

DEBUG_printf("malloc %d : %p\n", num_bytes, ptr);

return ptr;

}

#if MICROPY_ENABLE_FINALISER

void *m_malloc_with_finaliser(size_t num_bytes) {

void *ptr = malloc_with_finaliser(num_bytes);

if (ptr == NULL && num_bytes != 0) {

return m_malloc_fail(num_bytes);

}

#if MICROPY_MEM_STATS

MP_STATE_MEM(total_bytes_allocated) += num_bytes;

MP_STATE_MEM(current_bytes_allocated) += num_bytes;

UPDATE_PEAK();

DEBUG_printf("malloc %d : %p\n", num_bytes, ptr);

return ptr;

}

void *m_malloc0(size_t num_bytes) {

void *ptr = m_malloc(num_bytes);

// memory is already cleared by gc_alloc

return ptr;

}

#if MICROPY_MALLOC_USES_ALLOCATED_SIZE

void *m_realloc(void *ptr, size_t old_num_bytes, size_t new_num_bytes) {

void *m_realloc(void *ptr, size_t new_num_bytes) {

void *new_ptr = realloc(ptr, new_num_bytes);

if (new_ptr == NULL && new_num_bytes != 0) {

return m_malloc_fail(new_num_bytes);

}

#if MICROPY_MEM_STATS

// At first thought, "Total bytes allocated" should only grow,

// after all, it's *total*. But consider for example 2K block

// shrunk to 1K and then grown to 2K again. It's still 2K

// allocated total. If we process only positive increments,

// we'll count 3K.

size_t diff = new_num_bytes - old_num_bytes;

MP_STATE_MEM(total_bytes_allocated) += diff;

MP_STATE_MEM(current_bytes_allocated) += diff;

UPDATE_PEAK();

DEBUG_printf("realloc %p, %d, %d : %p\n", ptr, old_num_bytes, new_num_bytes, new_ptr);

return new_ptr;

}

#if MICROPY_MALLOC_USES_ALLOCATED_SIZE

void *m_realloc_maybe(void *ptr, size_t old_num_bytes, size_t new_num_bytes, bool allow_move) {

void *m_realloc_maybe(void *ptr, size_t new_num_bytes, bool allow_move) {

void *new_ptr = realloc_ext(ptr, new_num_bytes, allow_move);

#if MICROPY_MEM_STATS

// At first thought, "Total bytes allocated" should only grow,

// after all, it's *total*. But consider for example 2K block

// shrunk to 1K and then grown to 2K again. It's still 2K

// allocated total. If we process only positive increments,

// we'll count 3K.

// Also, don't count failed reallocs.

if (!(new_ptr == NULL && new_num_bytes != 0)) {

size_t diff = new_num_bytes - old_num_bytes;

MP_STATE_MEM(total_bytes_allocated) += diff;

MP_STATE_MEM(current_bytes_allocated) += diff;

UPDATE_PEAK();

}

DEBUG_printf("realloc %p, %d, %d : %p\n", ptr, old_num_bytes, new_num_bytes, new_ptr);

return new_ptr;

}

#if MICROPY_MALLOC_USES_ALLOCATED_SIZE

void m_free(void *ptr, size_t num_bytes) {

void m_free(void *ptr) {

free(ptr);

#if MICROPY_MEM_STATS

MP_STATE_MEM(current_bytes_allocated) -= num_bytes;

DEBUG_printf("free %p, %d\n", ptr, num_bytes);

}

#if MICROPY_MEM_STATS

size_t m_get_total_bytes_allocated(void) {

return MP_STATE_MEM(total_bytes_allocated);

}

size_t m_get_current_bytes_allocated(void) {

return MP_STATE_MEM(current_bytes_allocated);

}

size_t m_get_peak_bytes_allocated(void) {

return MP_STATE_MEM(peak_bytes_allocated);

}