Idle and timeout functions

["Charles \"grey wolf\" Banas" <greyfade gmail com>]

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Is there any way of determining that a function has already been queued
up as an idle or timeout function?

Specifically, I'm referring to the use of g_timeout_add() and
g_idle_add(). I need to call a function only a few times, and it's only
rarely needed, but I don't want to have 15 or so timeouts when I _do_
need it.
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