Index: libcfa/src/bits/weakso_locks.cfa
===================================================================
--- libcfa/src/bits/weakso_locks.cfa	(revision 73bf7ddcf37d065575ed554dfb7dbd70672e83f8)
+++ libcfa/src/bits/weakso_locks.cfa	(revision 94672bacac1a405e1334731db6f1186b2a824d64)
@@ -25,5 +25,5 @@
 void unlock( blocking_lock & ) {}
 void on_notify( blocking_lock &, struct thread$ * ) {}
-size_t on_wait( blocking_lock & ) { return 0; }
+size_t on_wait( blocking_lock &, void (*pp_fn)( void * ), void * pp_datum ) { return 0; }
 void on_wakeup( blocking_lock &, size_t ) {}
 size_t wait_count( blocking_lock & ) { return 0; }
Index: libcfa/src/bits/weakso_locks.hfa
===================================================================
--- libcfa/src/bits/weakso_locks.hfa	(revision 73bf7ddcf37d065575ed554dfb7dbd70672e83f8)
+++ libcfa/src/bits/weakso_locks.hfa	(revision 94672bacac1a405e1334731db6f1186b2a824d64)
@@ -57,5 +57,5 @@
 void unlock( blocking_lock & this ) OPTIONAL_THREAD;
 void on_notify( blocking_lock & this, struct thread$ * t ) OPTIONAL_THREAD;
-size_t on_wait( blocking_lock & this ) OPTIONAL_THREAD;
+size_t on_wait( blocking_lock & this, void (*pp_fn)( void * ), void * pp_datum ) OPTIONAL_THREAD;
 void on_wakeup( blocking_lock & this, size_t ) OPTIONAL_THREAD;
 size_t wait_count( blocking_lock & this ) OPTIONAL_THREAD;
@@ -75,5 +75,5 @@
 static inline bool   try_lock ( multiple_acquisition_lock & this ) { return try_lock( (blocking_lock &)this ); }
 static inline void   unlock   ( multiple_acquisition_lock & this ) { unlock  ( (blocking_lock &)this ); }
-static inline size_t on_wait  ( multiple_acquisition_lock & this ) { return on_wait ( (blocking_lock &)this ); }
+static inline size_t on_wait  ( multiple_acquisition_lock & this, void (*pp_fn)( void * ), void * pp_datum ) { return on_wait ( (blocking_lock &)this, pp_fn, pp_datum ); }
 static inline void   on_wakeup( multiple_acquisition_lock & this, size_t v ) { on_wakeup ( (blocking_lock &)this, v ); }
 static inline void   on_notify( multiple_acquisition_lock & this, struct thread$ * t ){ on_notify( (blocking_lock &)this, t ); }