- PBD::ProcessSemaphore _callback_start_sem;
- PBD::ProcessSemaphore _callback_done_sem;
- PBD::ProcessSemaphore _cleanup_sem;
+ /** Signalled to start a run of the graph for a process callback */
+ PBD::Semaphore _callback_start_sem;
+ PBD::Semaphore _callback_done_sem;
+ PBD::Semaphore _cleanup_sem;