From 9298482871dec324fb757bce52f15474f4525ebe Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Fri, 23 Feb 2018 15:15:43 +0100
Subject: erts: Clarify enif_self docs

---
 erts/doc/src/erl_nif.xml | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/erts/doc/src/erl_nif.xml b/erts/doc/src/erl_nif.xml
index ef3cdb89e9..b9c2e70b57 100644
--- a/erts/doc/src/erl_nif.xml
+++ b/erts/doc/src/erl_nif.xml
@@ -3044,9 +3044,10 @@ if (retval &amp; ERL_NIF_SELECT_STOP_CALLED) {
       </name>
       <fsummary>Get the pid of the calling process.</fsummary>
       <desc>
-        <p>Initializes the pid variable <c>*pid</c> to represent the
-          calling process.</p>
-        <p>Returns <c>pid</c>.</p>
+        <p>Initializes the <seealso marker="#ErlNifPid"><c>ErlNifPid</c></seealso>
+	variable at <c>*pid</c> to represent the calling process.</p>
+        <p>Returns <c>pid</c> if successful, or NULL if <c>caller_env</c> is not
+	a <seealso marker="#ErlNifEnv">process-bound environment</seealso>.</p>
       </desc>
     </func>
 
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