add tracing step by step

1 files changed, 2 insertions, 1 deletions

diff --git a/docs/application/thread.md b/docs/application/thread.md
index 3dc0b2f..ba67a7e 100644
--- a/docs/application/thread.md
+++ b/docs/application/thread.md
@@ -10,7 +10,7 @@ typedef struct _kpl_task kpl_task;
 typedef void kpl_task_fn(kpl_task *t);
 
 typedef struct _kpl_task {
-    POOL_HEADER(kpl_task);
+    POOL_HEADER(_kpl_task);
     _Atomic bool join_ready;
     uint16_t worker_id;
     kpl_task_fn *fn;
@@ -20,6 +20,7 @@ typedef struct _kpl_task {
 } kpl_task;
 
 typedef struct {
+    _Atomic bool gc_wait;
     kpl_task *queue_head, *queue_tail;
     pthread_t thread;
 } kpl_thread;