From: Niels Provos <provos@gmail.com>
Date: Sat, 1 Mar 2003 19:46:27 +0000 (+0000)
Subject: support disabling of event mechanisms via the environment; error out
X-Git-Tag: release-1.1b~131
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b5b585c1f9a13577e28549436bb7b95c0c427f6b;p=libevent

support disabling of event mechanisms via the environment; error out
if no event mechanism is available


svn:r38
---

diff --git a/event.c b/event.c
index f657028b..182847a5 100644
--- a/event.c
+++ b/event.c
@@ -133,6 +133,9 @@ event_init(void)
 		evbase = evsel->init();
 	}
 
+	if (evbase == NULL)
+		errx(1, "%s: no event mechanism available", __func__);
+
 #if defined(USE_LOG) && defined(USE_DEBUG)
 	log_to(stderr);
 	log_debug_cmd(LOG_MISC, 80);
diff --git a/poll.c b/poll.c
index f84d3553..8f30086b 100644
--- a/poll.c
+++ b/poll.c
@@ -92,6 +92,10 @@ struct eventop pollops = {
 void *
 poll_init(void)
 {
+	/* Disable kqueue when this environment variable is set */
+	if (getenv("EVENT_NOPOLL"))
+		return (NULL);
+
 	memset(&pop, 0, sizeof(pop));
 
 	evsignal_init(&pop.evsigmask);
diff --git a/select.c b/select.c
index bed15624..86d0e357 100644
--- a/select.c
+++ b/select.c
@@ -96,6 +96,10 @@ struct eventop selectops = {
 void *
 select_init(void)
 {
+	/* Disable kqueue when this environment variable is set */
+	if (getenv("EVENT_NOSELECT"))
+		return (NULL);
+
 	memset(&sop, 0, sizeof(sop));
 
 	evsignal_init(&sop.evsigmask);