(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.
此函数没有参数。
ev_depth() returns recursion depth of the default loop.