1 files changed, 13 insertions, 0 deletions

diff --git a/listpool/src/listpool.c b/listpool/src/listpool.c
index 8e49f32..758062c 100644
--- a/listpool/src/listpool.c
+++ b/listpool/src/listpool.c
@@ -77,3 +77,16 @@ void listpool_free_(listpool* pool, void** block_ptr) {
 
   *block_ptr = 0;
 }
+
+void* listpool_get_block_(const listpool* pool, size_t block_index) {
+  assert(pool);
+  assert(block_index < pool->num_blocks);
+  return pool->blocks + block_index * pool->block_size_bytes;
+}
+
+size_t listpool_get_block_index_(const listpool* pool, const void* block) {
+  assert(pool);
+  const size_t block_byte_index = (const uint8_t*)block - pool->blocks;
+  assert(block_byte_index % pool->block_size_bytes == 0);
+  return block_byte_index / pool->block_size_bytes;
+}