1 files changed, 129 insertions, 0 deletions
diff --git a/lib/isc/pthreads/thread.c b/lib/isc/pthreads/thread.c
new file mode 100644
index 0000000..4c7380c
--- /dev/null
+++ b/lib/isc/pthreads/thread.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * 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 https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file */
+
+#if defined(HAVE_SCHED_H)
+#include <sched.h>
+#endif /* if defined(HAVE_SCHED_H) */
+
+#if defined(HAVE_CPUSET_H)
+#include <sys/cpuset.h>
+#include <sys/param.h>
+#endif /* if defined(HAVE_CPUSET_H) */
+
+#if defined(HAVE_SYS_PROCSET_H)
+#include <sys/processor.h>
+#include <sys/procset.h>
+#include <sys/types.h>
+#endif /* if defined(HAVE_SYS_PROCSET_H) */
+
+#include <isc/strerr.h>
+#include <isc/thread.h>
+#include <isc/util.h>
+
+#include "trampoline_p.h"
+
+#ifndef THREAD_MINSTACKSIZE
+#define THREAD_MINSTACKSIZE (1024U * 1024)
+#endif /* ifndef THREAD_MINSTACKSIZE */
+
+#define _FATAL(r, f)                                                          \
+	{                                                                     \
+		char strbuf[ISC_STRERRORSIZE];                                \
+		strerror_r(r, strbuf, sizeof(strbuf));                        \
+		isc_error_fatal(__FILE__, __LINE__, f " failed: %s", strbuf); \
+	}
+
+void
+isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
+		  isc_thread_t *thread) {
+	pthread_attr_t attr;
+	isc__trampoline_t *trampoline_arg;
+
+	trampoline_arg = isc__trampoline_get(func, arg);
+
+#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
+	defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
+	size_t stacksize;
+#endif /* if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
+	* defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE) */
+	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) {
+		_FATAL(ret, "pthread_attr_getstacksize()");
+	}
+
+	if (stacksize < THREAD_MINSTACKSIZE) {
+		ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE);
+		if (ret != 0) {
+			_FATAL(ret, "pthread_attr_setstacksize()");
+		}
+	}
+#endif /* if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
+	* defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE) */
+
+	ret = pthread_create(thread, &attr, isc__trampoline_run,
+			     trampoline_arg);
+	if (ret != 0) {
+		_FATAL(ret, "pthread_create()");
+	}
+
+	pthread_attr_destroy(&attr);
+
+	return;
+}
+
+void
+isc_thread_join(isc_thread_t thread, isc_threadresult_t *result) {
+	int ret = pthread_join(thread, result);
+	if (ret != 0) {
+		_FATAL(ret, "pthread_join()");
+	}
+}
+
+void
+isc_thread_setname(isc_thread_t thread, const char *name) {
+#if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__)
+	/*
+	 * macOS has pthread_setname_np but only works on the
+	 * current thread so it's not used here
+	 */
+#if defined(__NetBSD__)
+	(void)pthread_setname_np(thread, name, NULL);
+#else  /* if defined(__NetBSD__) */
+	(void)pthread_setname_np(thread, name);
+#endif /* if defined(__NetBSD__) */
+#elif defined(HAVE_PTHREAD_SET_NAME_NP)
+	(void)pthread_set_name_np(thread, name);
+#else  /* if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__) */
+	UNUSED(thread);
+	UNUSED(name);
+#endif /* if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__) */
+}
+
+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 /* if defined(HAVE_SCHED_YIELD) */
+}