Virgin import of ntpd 4.2.6p5.vendor/ntp/4.2.6p5

When the series of commits is complete, things like
https://cert.litnet.lt/en/docs/ntp-distributed-reflection-dos-attacks
should be fixed.

PR:		bin/148836 (except that we import a newer version)
Asked by:	Too many
MFC after:	2 weeks

1 files changed, 76 insertions, 0 deletions

diff --git a/lib/isc/pthreads/thread.c b/lib/isc/pthreads/thread.c
new file mode 100644
index 000000000000..4b5b4919b2b0
--- /dev/null
+++ b/lib/isc/pthreads/thread.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2000, 2001, 2003  Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: thread.c,v 1.17 2007/06/19 23:47:18 tbox Exp $ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <isc/thread.h>
+#include <isc/util.h>
+
+#ifndef THREAD_MINSTACKSIZE
+#define THREAD_MINSTACKSIZE		(64U * 1024)
+#endif
+
+isc_result_t
+isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
+		  isc_thread_t *thread)
+{
+	pthread_attr_t attr;
+	size_t stacksize;
+	int ret;
+
+	pthread_attr_init(&attr);
+
+#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
+    defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
+	ret = pthread_attr_getstacksize(&attr, &stacksize);
+	if (ret != 0)
+		return (ISC_R_UNEXPECTED);
+
+	if (stacksize < THREAD_MINSTACKSIZE) {
+		ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE);
+		if (ret != 0)
+			return (ISC_R_UNEXPECTED);
+	}
+#endif
+
+#if defined(PTHREAD_SCOPE_SYSTEM) && defined(NEED_PTHREAD_SCOPE_SYSTEM)
+	ret = pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
+	if (ret != 0)
+		return (ISC_R_UNEXPECTED);
+#endif
+
+	ret = pthread_create(thread, &attr, func, arg);
+	if (ret != 0)
+		return (ISC_R_UNEXPECTED);
+
+	pthread_attr_destroy(&attr);
+
+	return (ISC_R_SUCCESS);
+}
+
+void
+isc_thread_setconcurrency(unsigned int level) {
+#if defined(CALL_PTHREAD_SETCONCURRENCY)
+	(void)pthread_setconcurrency(level);
+#else
+	UNUSED(level);
+#endif
+}