From c0435959dabc079cc172b344c4eec7647ed44077 Mon Sep 17 00:00:00 2001
From: Fabio Alessandrelli <fabio.alessandrelli@gmail.com>
Date: Tue, 6 Nov 2018 09:04:37 +0100
Subject: [PATCH] RingBuffer::decrease_write

---
 core/ring_buffer.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/core/ring_buffer.h b/core/ring_buffer.h
index 25168800640..54486f8cadc 100644
--- a/core/ring_buffer.h
+++ b/core/ring_buffer.h
@@ -135,6 +135,12 @@ public:
 		return p_n;
 	};
 
+	inline int decrease_write(int p_n) {
+		p_n = MIN(p_n, data_left());
+		inc(write_pos, size_mask + 1 - p_n);
+		return p_n;
+	}
+
 	Error write(const T &p_v) {
 		ERR_FAIL_COND_V(space_left() < 1, FAILED);
 		data.write[inc(write_pos, 1)] = p_v;