From eefcc985530acbd5cc4c97b6e4f537492fd61622 Mon Sep 17 00:00:00 2001
From: Pouriya <pouriya.jahanbakhsh@gmail.com>
Date: Thu, 26 Apr 2018 13:49:59 +0000
Subject: [stdlib/sys]: install one debug function more times (#1781)

Allow installing multiple instances of sys debug function

This commit solves a bug which allowed installing {Fun,State} as sys debug function even if Fun was already installed. This happened in the case when the current State of the debug fun was undefined.

Also, the new format {Id,Fun,State} of debug functions can be installed, allowing multiple instances of the same fun.
---
 lib/stdlib/doc/src/sys.xml | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'lib/stdlib/doc')

diff --git a/lib/stdlib/doc/src/sys.xml b/lib/stdlib/doc/src/sys.xml
index 8930087555..59e5bb6cb5 100644
--- a/lib/stdlib/doc/src/sys.xml
+++ b/lib/stdlib/doc/src/sys.xml
@@ -276,7 +276,9 @@
         <p><c><anno>Func</anno></c> is called whenever a system event is
           generated. This function is to return <c>done</c>, or a new
           <c>Func</c> state. In the first case, the function is removed. It is 
-          also removed if the function fails.</p>
+          also removed if the function fails. If one debug function should be 
+          installed more times, a unique <c><anno>FuncId</anno></c> must be 
+          specified for each installation.</p>
       </desc>
     </func>
 
@@ -330,8 +332,8 @@
       <fsummary>Remove a debug function from the process.</fsummary>
       <desc>
         <p>Removes an installed debug function from the
-          process. <c><anno>Func</anno></c> must be the same as previously
-          installed.</p>
+          process. <c><anno>Func</anno></c> or <c><anno>FuncId</anno></c> must be 
+          the same as previously installed.</p>
       </desc>
     </func>
 
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