(PECL ev >= 0.2.0) Create instance of a stopped EvCheck watcher

(PECL eio >= 0.0.1dev) Synchronize a file's in-core state with storage device.

(PECL ev >= 0.2.0) Creates EvCheck object associated with the current event loop instance

(PECL pthreads >= 2.0.0) Create a Condition

(PECL ev >= 0.2.0) Creates EvPrepare watcher object associated with the current event loop instance

(PECL ev >= 0.2.0) Performs internal consistency checks(for debugging)

(PECL pthreads >= 2.0.0) Submits an object for execution

(PECL libevent >= 0.0.1) Write data to a buffered event

(PECL eio >= 0.0.1dev) Returns number of finished, but unhandled requests

(PECL ev >= 0.2.0) Returns the set of backends that are embeddable in other event loops.