Add documentation for supplemental functions.

This includes platform portability stuff like mutexes and threads,
etc.  While here we fixed a problem with nng_opts_parse and we
addressed the type of the platform API.

1 files changed, 46 insertions, 0 deletions

diff --git a/docs/man/nng_thread_destroy.3supp.adoc b/docs/man/nng_thread_destroy.3supp.adoc
new file mode 100644
index 00000000..b58c623b
--- /dev/null
+++ b/docs/man/nng_thread_destroy.3supp.adoc
@@ -0,0 +1,46 @@
+= nng_thread_destroy(3supp)
+//
+// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_thread_destroy - reap thread
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+#include <nng/supplemental/util/platform.h>
+
+void nng_thread_destroy(nng_thread *thread);
+----
+
+== DESCRIPTION
+
+The `nng_thread_destroy()` function reaps the _thread_.
+It waits for the thread function to return, and then deallocates
+the resources for the thread.
+
+IMPORTANT: Do not call this function from the thread function itself,
+or a deadlock will occur.
+
+== RETURN VALUES
+
+None.
+
+== ERRORS
+
+None.
+
+== SEE ALSO
+
+<<nng_thread_create.3supp#,nng_thread_create(3supp)>>,
+<<nng.7#,nng(7)>>