unwind-protect-blocking-interrupts-in-cleanups

unwind-protect-blocking-interrupts-in-cleanups Macro

Summary

Does unwind-protect blocking interrupts around the cleanups.

Package

hcl

Signature

unwind-protect-blocking-interrupts-in-cleanups protected-form &rest cleanups => results

Arguments

`protected-form`⇩	A form.
`cleanups`⇩	Forms.

Values

results

The values of protected-form.

Description

The macro unwind-protect-blocking-interrupts-in-cleanups executes protected-form. On exit, whether local or not, cleanups are executed with interrupts blocked.

In compiled code, the macro is equivalent to:

(unwind-protect
    protected-form
  (mp:with-interrupts-blocked cleanup1 cleanup2 ..)

However, in interpreted code the macro is expanded to ensure that the body of mp:with-interrupts-blocked actually happens. If the form above is interpreted the evaluator may throw (if the process is killed, for example) before completing macroexpansion of mp:with-interrupts-blocked and doing the actual blocking.

Notes

cleanups can block and unblock interrupts using current-process-block-interrupts and current-process-unblock-interrupts. This may be useful if some of the cleanups are essential and others are not.
Blocking interrupts causes the process to not respond to interrupts, including killing. You should make sure that forms which are executed with interrupts blocked do not hang.