feat: (device) dev_null and dev_rand support

[lunaix-os.git] / lunaix-os / kernel / ds / fifo.c

diff --git a/lunaix-os/kernel/ds/fifo.c b/lunaix-os/kernel/ds/fifo.c
index 7f34bf63132900953a890e1795c44050b478adf5..252cd2dd7df55d290aa8270b588145a13eb50273 100644 (file)
--- a/lunaix-os/kernel/ds/fifo.c
+++ b/lunaix-os/kernel/ds/fifo.c
@@ -15,6 +15,16 @@ fifo_init(struct fifo_buf* buf, void* data_buffer, size_t buf_size, int flags)
     mutex_init(&buf->lock);
 }
 
     mutex_init(&buf->lock);
 }
 

+void
+fifo_clear(struct fifo_buf* fbuf)
+{
+    mutex_lock(&fbuf->lock);
+    fbuf->rd_pos = 0;
+    fbuf->wr_pos = 0;
+    fbuf->free_len = fbuf->size;
+    mutex_unlock(&fbuf->lock);
+}
+

 int
 fifo_backone(struct fifo_buf* fbuf)
 {
 int
 fifo_backone(struct fifo_buf* fbuf)
 {