add a comment

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6682

diff --git a/include/pub_tool_libcproc.h b/include/pub_tool_libcproc.h
index d8bad0a3a1a2c97d29b7b3c73d1be98eb1d151dd..25931bfb29950af79124904517b68faed8fcec68 100644 (file)
--- a/include/pub_tool_libcproc.h
+++ b/include/pub_tool_libcproc.h
@@ -75,6 +75,9 @@ extern Int VG_(getegid) ( void );
    Timing
    ------------------------------------------------------------------ */
 
+// Returns the number of milliseconds passed since the progam started
+// (roughly;  it gets initialised partway through Valgrind's initialisation
+// steps).
 extern UInt VG_(read_millisecond_timer) ( void );
 
 #endif   // __PUB_TOOL_LIBCPROC_H