From 7d3884b5cfc282dbdfe5d9a22d8b2b343280b8af Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Tue, 1 Feb 2022 20:36:30 -0700
Subject: Thread yield control to any other threads

---
 src/cpu/irq.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'src/cpu')

diff --git a/src/cpu/irq.c b/src/cpu/irq.c
index 612b6d8..2197067 100644
--- a/src/cpu/irq.c
+++ b/src/cpu/irq.c
@@ -140,14 +140,15 @@ void testfxn2(void)
 
 void testfxn(void)
 {
-	unsigned int i = 0x69420;
+	unsigned long long ti = get_sys_time();
+	unsigned int i = 0xDEADBEEF;
 	void* a = malloc(5);
 	void* b = malloc(3);
 	void* c = malloc(4);
 	void* d = malloc(4);
 	uart_string("Start\n");
 	add_thread(testfxn2, 0, 0);
-	delay(0x20000000);
+	sys0(SYS_YIELD);
 	uart_string("Freeing B\n");
 	free(b);
 	uart_string("Freeing A\n");
@@ -160,4 +161,11 @@ void testfxn(void)
 	delay(0x20000000);
 	uart_hexn(i);
 	uart_string("End\n");
+	unsigned long long tf = get_sys_time();
+	unsigned long long dt = tf-ti;
+	unsigned long thi, tlo;
+	thi = dt >> 32;
+	tlo = dt;
+	uart_hex(thi);
+	uart_hexn(tlo);
 }
-- 
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