threads: add parent info + get_parent() method

diff --git a/threads.cc b/threads.cc
index bc553b140fe4df5a1a2a3e39da7b7b1b91644403..cc939318938170da4712191ab7ea7bd20e78140b 100644 (file)
--- a/threads.cc
+++ b/threads.cc
@@ -87,6 +87,7 @@ Thread::Thread(thrd_t *t, void (*func)(), void *a) {
        state = THREAD_CREATED;
        id = model->get_next_id();
        *user_thread = id;
+       parent = thread_current();
 }
 
 Thread::~Thread()

diff --git a/threads.h b/threads.h
index 38eac0a9cba43bc4107ee02f02eaaf4763b9595a..345f42077a2372510d5922cd31d26420ed274cd7 100644 (file)
--- a/threads.h
+++ b/threads.h
@@ -31,8 +31,10 @@ public:
        void set_state(thread_state s) { state = s; }
        thread_id_t get_id();
        thrd_t get_thrd_t() { return *user_thread; }
+       Thread * get_parent() { return parent; }
 private:
        int create_context();
+       Thread *parent;
 
        void (*start_routine)();
        void *arg;