From: Matthias Kruk <m@m10k.eu>
Date: Mon, 25 Nov 2019 07:20:32 +0000 (+0900)
Subject: Add sched_task_resume() function
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=7986a66c03205b3b445b77d1a712c2f0e1f7c3ff;p=corax

Add sched_task_resume() function
---

diff --git a/kernel/core/sched.c b/kernel/core/sched.c
index 15a8a0f..1d73477 100644
--- a/kernel/core/sched.c
+++ b/kernel/core/sched.c
@@ -257,3 +257,34 @@ int sched_task_suspend(task_t *t)
 
 	return(ret_val);
 }
+
+int sched_task_resume(task_t *t)
+{
+	int ret_val;
+
+	/*
+	 * Make sure the task is currently in the TASK_STATE_WAITING state.
+	 * If it is, change its state to TASK_STATE_READY.
+	 */
+	task_lock(t);
+
+	if(t->t_state == TASK_STATE_WAITING) {
+		t->t_state = TASK_STATE_READY;
+		ret_val = 0;
+	} else {
+		ret_val = -EBUSY;
+	}
+
+	task_unlock(t);
+
+	/* if the task was waiting, remove it from the waitq and add it to the readyq */
+	if(!ret_val) {
+		ret_val = _unq(&_waitq, t);
+
+		if(ret_val >= 0) {
+			_nq(&_readyq, t);
+		}
+	}
+
+	return(ret_val);
+}
diff --git a/kernel/include/sched.h b/kernel/include/sched.h
index 4f54bea..65efeb9 100644
--- a/kernel/include/sched.h
+++ b/kernel/include/sched.h
@@ -9,5 +9,6 @@ int  sched_enqueue(task_t*);
 int  sched_dequeue(task_t*);
 int  sched_signal(pid_t);
 int  sched_task_suspend(task_t*);
+int  sched_task_resume(task_t*);
 
 #endif /* __CORE_SCHED_H */