Add perl_tsa_mutex_* to exported functions

When PERL_TSA_ACTIVE is defined, perl_tsa_mutex_lock and perl_tsa_mutex_unlock
are required to be defined. However, they are not exported so they cannot be used
by core extensions such as re.

Author: FractalBoy

makedef.pl

@@ -1166,6 +1166,13 @@ sub readvar {
 		 ));
 }
 
+if ($define{USE_ITHREADS} && $define{I_PTHREAD}) {
+    try_symbols(qw(
+		      perl_tsa_mutex_lock
+		      perl_tsa_mutex_unlock
+		 ));
+}
+
 # When added this code was only run for Win32 (and WinCE at the time)
 # Currently only Win32 links static extensions into the shared library.
 # For *nix (and presumably OS/2) with a shared libperl, Makefile.SH compiles

perl.h

@@ -3752,6 +3752,9 @@ EXTERN_C int perl_tsa_mutex_lock(perl_mutex* mutex)
 EXTERN_C int perl_tsa_mutex_unlock(perl_mutex* mutex)
   PERL_TSA_RELEASE(*mutex)
   PERL_TSA_NO_TSA;
+#elif defined(USE_ITHREADS) && defined(I_PTHREAD)
+EXTERN_C int perl_tsa_mutex_lock(perl_mutex* mutex);
+EXTERN_C int perl_tsa_mutex_unlock(perl_mutex* mutex);
 #endif
 
 #if defined(WIN32)