122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "misc.h"
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#include "mpconfig.h"
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#if 0 // print debugging info
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#define DEBUG_printf(args...) printf(args)
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#else // don't print debugging info
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#define DEBUG_printf(args...) (void)0
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#endif
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#if MICROPY_MEM_STATS
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static int total_bytes_allocated = 0;
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static int current_bytes_allocated = 0;
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static int peak_bytes_allocated = 0;
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#define UPDATE_PEAK() { if (current_bytes_allocated > peak_bytes_allocated) peak_bytes_allocated = current_bytes_allocated; }
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#endif
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#if MICROPY_ENABLE_GC
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#include "gc.h"
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// We redirect standard alloc functions to GC heap - just for the rest of
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// this module. In the rest of micropython source, system malloc can be
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// freely accessed - for interfacing with system and 3rd-party libs for
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// example. On the other hand, some (e.g. bare-metal) ports may use GC
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// heap as system heap, so, to avoid warnings, we do undef's first.
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#undef malloc
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#undef free
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#undef realloc
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#define malloc gc_alloc
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#define free gc_free
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#define realloc gc_realloc
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#endif // MICROPY_ENABLE_GC
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void *m_malloc(int num_bytes) {
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if (num_bytes == 0) {
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return NULL;
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}
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void *ptr = malloc(num_bytes);
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if (ptr == NULL) {
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printf("could not allocate memory, allocating %d bytes\n", num_bytes);
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return NULL;
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}
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#if MICROPY_MEM_STATS
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total_bytes_allocated += num_bytes;
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current_bytes_allocated += num_bytes;
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UPDATE_PEAK();
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#endif
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DEBUG_printf("malloc %d : %p\n", num_bytes, ptr);
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return ptr;
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}
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void *m_malloc0(int num_bytes) {
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void *ptr = m_malloc(num_bytes);
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if (ptr != NULL) {
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memset(ptr, 0, num_bytes);
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}
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return ptr;
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}
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void *m_realloc(void *ptr, int old_num_bytes, int new_num_bytes) {
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if (new_num_bytes == 0) {
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free(ptr);
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return NULL;
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}
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void *new_ptr = realloc(ptr, new_num_bytes);
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if (new_ptr == NULL) {
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printf("could not allocate memory, reallocating %d bytes\n", new_num_bytes);
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return NULL;
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}
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#if MICROPY_MEM_STATS
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// At first thought, "Total bytes allocated" should only grow,
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// after all, it's *total*. But consider for example 2K block
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// shrunk to 1K and then grown to 2K again. It's still 2K
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// allocated total. If we process only positive increments,
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// we'll count 3K.
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int diff = new_num_bytes - old_num_bytes;
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total_bytes_allocated += diff;
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current_bytes_allocated += diff;
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UPDATE_PEAK();
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#endif
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DEBUG_printf("realloc %p, %d, %d : %p\n", ptr, old_num_bytes, new_num_bytes, new_ptr);
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return new_ptr;
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}
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void m_free(void *ptr, int num_bytes) {
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if (ptr != NULL) {
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free(ptr);
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}
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#if MICROPY_MEM_STATS
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current_bytes_allocated -= num_bytes;
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#endif
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DEBUG_printf("free %p, %d\n", ptr, num_bytes);
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}
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int m_get_total_bytes_allocated(void) {
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#if MICROPY_MEM_STATS
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return total_bytes_allocated;
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#else
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return -1;
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#endif
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}
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int m_get_current_bytes_allocated(void) {
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#if MICROPY_MEM_STATS
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return current_bytes_allocated;
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#else
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return -1;
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#endif
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}
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int m_get_peak_bytes_allocated(void) {
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#if MICROPY_MEM_STATS
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return peak_bytes_allocated;
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#else
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return -1;
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#endif
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}
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