sched: prototype for thread cleanup in waitpid()

Author: jewelcodes

src/include/kernel/sched.h

@@ -120,6 +120,7 @@ int schedException(pid_t, pid_t);
 void terminateThread(Thread *, int, bool);
 void schedSleepTimer();
 Thread *getKernelThread();
+void threadCleanup(Thread *);
 
 // these functions are exposed as system calls, but some will need to take
 // the thread as an argument from the system call handler - the actual user

src/sched/waitpid.c

@@ -27,7 +27,12 @@ static pid_t processStatus(Process *p, int *status) {
         if((!t->clean) && (t->status == THREAD_ZOMBIE)) {
             t->clean = true;
             *status = t->exitStatus;
-            return t->tid;
+            pid_t pid = t->tid;
+
+            // free the thread structure
+            threadCleanup(t);
+
+            return pid;
         }
     }