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#pike __REAL_VERSION__
#require constant(System._FSEvents)
//! The @[System.FSEvents] module provides an interface to FSEvents.
//! FSEvents is an API in Mac OS X which allows an application to register
//! for notifications of changes to a given directory tree without forcing
//! the application to continously poll the directory tree.
//!
//! This module is designed for use in asynchronous, or backend mode. That
//! is, rather than polling for changes, a function you specify will be
//! called when events of interest occur.
//!
//! @note
//! This module requires the presence and use of a CFRunLoop based Backend
//! object, otherwise this module will not receive events from the OS.
//! CFRunLoop based backends are avilable on Mac OS X 10.5 and higher.
//!
//! @seealso
//! @[Pike.PollDeviceBackend.enable_core_foundation]
inherit System._FSEvents;
//! describe the event flags associated with an event.
//!
//! @returns
//! a string describing the flags set.
string describe_event_flag(int mask) {
array(string) list = ({});
foreach (indices(this_program);; string name) {
if (has_prefix(name, "kFSEventStreamEventFlag")) {
int value = `[](this_program, name);
if (value & mask) list += ({ name });
}
}
return list * "|";
}
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