From ef6aa99b743a33b20f6b04b199c9d98b1230e578 Mon Sep 17 00:00:00 2001
From: Giacomo Tesio <giacomo@tesio.it>
Date: Wed, 16 Aug 2017 00:37:39 +0200
Subject: [PATCH] qa: libc: slow note handlers cant't break sleep

---
 qa/lib/c/build.json |  1 +
 qa/lib/c/sleep2.c   | 83 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 qa/lib/c/sleep2.c

diff --git a/qa/lib/c/build.json b/qa/lib/c/build.json
index 9a058dd..1271f7d 100644
--- a/qa/lib/c/build.json
+++ b/qa/lib/c/build.json
@@ -32,6 +32,7 @@
 			"rwakeup0.c",
 			"rwakeup1.c",
 			"sleep.c",
+			"sleep2.c",
 			"sqrt.c",
 			"sysfatal.c",
 			"va_copy.c",
diff --git a/qa/lib/c/sleep2.c b/qa/lib/c/sleep2.c
new file mode 100644
index 0000000..5dc8c5b
--- /dev/null
+++ b/qa/lib/c/sleep2.c
@@ -0,0 +1,83 @@
+/*
+ * This file is part of Jehanne.
+ *
+ * Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
+ *
+ * Jehanne is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * Jehanne is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <u.h>
+#include <lib9.h>
+
+/* Test sleep(2): notes during a sleep don't break it even if note
+ * handler takes a while
+ */
+int verbose = 0;
+
+int
+printFirst(void *v, char *s)
+{
+	/* just not exit, please */
+	if(strcmp(s, "alarm") == 0){
+		if(verbose)
+			fprint(2, "%d: noted: %s at %lld\n", getpid(), s, nsec());
+		atnotify(printFirst, 0);
+		sleep(2000);
+		return 1;
+	}
+	return 0;
+}
+
+int
+failOnSecond(void *v, char *s)
+{
+	/* just not exit, please */
+	if(strcmp(s, "alarm") == 0){
+		print("FAIL: timedout\n");
+		exits("FAIL");
+	}
+	return 0;
+}
+
+void
+main(void)
+{
+	int64_t a2000, a500, tStart, tEnd;
+	if (!atnotify(printFirst, 1) || !atnotify(failOnSecond, 1)){
+		fprint(2, "%r\n");
+		exits("atnotify fails");
+	}
+
+	alarm(5000);
+	a2000 = nsec();
+	alarm(500);
+	a500 = nsec();
+	tStart = nsec();
+	sleep(1000);
+	tEnd = nsec();
+
+	if(verbose)
+		fprint(2, "%d: set alarm(2000)@%lld then alarm(500)@%lld; elapsed in sleep() %lld nanosecond\n", getpid(), a2000, a500, tEnd-tStart);
+
+	if((tEnd-tStart)/(1000 * 1000) > 500+2000+400 /* 400ms = acceptable error */){
+		print("FAIL: should sleep less\n");
+		exits("FAIL");
+	}
+
+	if((tEnd-tStart)/(1000 * 1000) < 500+2000-400  /* 400ms = acceptable error */){
+		print("FAIL: should sleep more\n");
+		exits("FAIL");
+	}
+
+	print("PASS\n");
+	exits("PASS");
+}