Add minimal mutexes to the minimal tasking system

1 files changed, 13 insertions, 0 deletions

diff --git a/task.c b/task.c
index 600b679..bc6eded 100644
--- a/task.c
+++ b/task.c
@@ -326,3 +326,16 @@ void task_delay(uint32_t delay)
     while ((HAL_GetTick() - tickstart) < delay)
 	task_yield();
 }
+
+void task_mutex_lock(task_mutex_t *mutex)
+{
+    while (mutex->locked)
+	task_yield();
+    mutex->locked = 1;
+}
+
+void task_mutex_unlock(task_mutex_t *mutex)
+{
+    if (mutex != NULL)
+	mutex->locked = 0;
+}