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system asyncs


From: Matt Wette
Subject: system asyncs
Date: Mon, 15 Dec 2014 20:48:23 -0800

Hi Folks,

In the 2.0 Guile Reference Manual, Section 6.21.2.1 it says:

The blocking level starts out at zero, and whenever a safe point is reached, a blocking level greater than zero will prevent the execution of queued asyncs.

Can anyone elaborate on this a little?   I don't understand this statement.

THanks,
Matt


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