1 files changed, 103 insertions, 0 deletions
diff --git a/lib/isc/pthreads/thread.c b/lib/isc/pthreads/thread.c
new file mode 100644
index 0000000..94fb2c2
--- /dev/null
+++ b/lib/isc/pthreads/thread.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+
+/*! \file */
+
+#include <config.h>
+
+#if defined(HAVE_SCHED_H)
+#include <sched.h>
+#endif
+
+#include <isc/thread.h>
+#include <isc/util.h>
+
+#ifndef THREAD_MINSTACKSIZE
+#define THREAD_MINSTACKSIZE		(1024U * 1024)
+#endif
+
+isc_result_t
+isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
+		  isc_thread_t *thread)
+{
+	pthread_attr_t attr;
+#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
+    defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
+	size_t stacksize;
+#endif
+	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
+}
+
+void
+isc_thread_setname(isc_thread_t thread, const char *name) {
+#if defined(HAVE_PTHREAD_SETNAME_NP) && defined(_GNU_SOURCE)
+	/*
+	 * macOS has pthread_setname_np but only works on the
+	 * current thread so it's not used here
+	*/
+	(void)pthread_setname_np(thread, name);
+#elif defined(HAVE_PTHREAD_SET_NAME_NP)
+	(void)pthread_set_name_np(thread, name);
+#else
+	UNUSED(thread);
+	UNUSED(name);
+#endif
+}
+
+void
+isc_thread_yield(void) {
+#if defined(HAVE_SCHED_YIELD)
+	sched_yield();
+#elif defined( HAVE_PTHREAD_YIELD)
+	pthread_yield();
+#elif defined( HAVE_PTHREAD_YIELD_NP)
+	pthread_yield_np();
+#endif
+}