diff options
Diffstat (limited to 'libs/pbd/pbd/crossthread.h')
| -rw-r--r-- | libs/pbd/pbd/crossthread.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libs/pbd/pbd/crossthread.h b/libs/pbd/pbd/crossthread.h new file mode 100644 index 0000000000..413dea024e --- /dev/null +++ b/libs/pbd/pbd/crossthread.h @@ -0,0 +1,38 @@ +#ifndef __pbd__crossthread_h__ +#define __pbd__crossthread_h__ + +#include <pbd/abstract_ui.h> +#include <sigc++/sigc++.h> +#include <pthread.h> + +template<class RequestType> +void +call_slot_from_thread_or_dispatch_it (pthread_t thread_id, AbstractUI<RequestType>& ui, sigc::slot<void> theSlot) +{ + /* when called, this function will determine whether the calling thread + is the same as thread specified by the first argument. if it is, + the we execute the slot. if not, we ask the interface given by the second + argument to call the slot. + */ + + if (pthread_self() == thread_id) { + theSlot (); + } else { + ui.call_slot (theSlot); + } +} + +template<class RequestType> +sigc::slot<void> +crossthread_safe (pthread_t thread_id, AbstractUI<RequestType>& ui, sigc::slot<void> theSlot) +{ + /* this function returns a slot that will ensure that theSlot is either + called by the specified thread or passed to the interface via + AbstractUI::call_slot(). + */ + + return sigc::bind (sigc::ptr_fun (call_slot_from_thread_or_dispatch_it<RequestType>), + thread_id, ui, theSlot); +} + +#endif /* __pbd__crossthread_h__ */ |