How can I get free heap size?

[MoonLight423]

First，it,s celebratory that tlsf work well in SDRAM with STM32H750.

But how can I know the free size just like esp_get_free_heap_size();
I try to log info after malloc, but the value not change.Or I need to count that in my way?
log_d("tlsf size:%d", tlsf_size()); log_d("tlsf align size:%d", tlsf_align_size()); log_d("tlsf block size_min:%d", tlsf_block_size_min()); log_d("tlsf block size max:%d", tlsf_block_size_max());

[paniq]

@MoonLight423 as documented in the header, these functions all return constants. There is no function that gives you the available memory directly. However, you can use tlsf_walk_pool to get all unused blocks, and tlsf_block_size to get the size of each unused block.

[copilotenstar]

tlsf_walk_pool doesn't seem to work? block_is_last always returns true and never calls the walker callback.

int pool_size = 20 * 1024 * 1024;
    void* pool = malloc(pool_size);
    void* tlsf = tlsf_create_with_pool(pool, pool_size);

    tlsf_malloc(tlsf, 24);
    tlsf_malloc(tlsf, 32);
    tlsf_malloc(tlsf, 64);

    // ........

    void
    block_info(void* ptr, size_t size, int used, void* user)
    {
        if (used) {
            printf("Block: %p, Size: %zu\n", ptr, size);
        }
    }

    tlsf_walk_pool(pool, block_info, NULL);

[copilotenstar]

seems like you need to use tlsf_get_pool. For anyone else that comes across this.

correct should be:

void* pool = malloc(pool_size);
void* tlsf = tlsf_create_with_pool(pool, pool_size);
// .....
 tlsf_walk_pool(tlsf_get_pool(tlsf), block_info, NULL);