(PECL ev >= 0.2.0)
Ev::depth — Returns recursion depth
The number of times Ev::run() was entered minus the number of times Ev::run() was exited normally, in other words, the recursion depth. Outside Ev::run() , this number is
0 . In a callback, this number is
1 , unless Ev::run() was invoked recursively (or from another thread), in which case it is higher.
У этой функции нет параметров.
ev_depth() returns recursion depth of the default loop.