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ext:with-interrupts Execute code with interrupts optionally enabled. ext:with-interrupts &body; body Executes the given body with all interrupts enabled. Since interrupts are normally enabled, this macro only makes sense if there is an outer ext:without-interrupts with a corresponding ext:allow-with-interrupts: interrupts are not enabled if any outer mp:without-interrupts is not accompanied by mp:allow-with-interrupts. ext:without-interrupts Execute code without being interrupted. ext:without-interrupts &body; body Executes the given body with all interrupts disabled. This macro is compatible with the one in &SBCL; and as such it also defines three other local macros ext:allow-with-interrupts, ext:with-local-interrupts and ext:with-restored-interrupts. Deferrable interrupts include most blockable POSIX signals, and mp:interrupt-process. Does not interfere with garbage collection, and does not inhibit scheduling of other threads. This macro binds allow-with-interrupts, with-local-interrupts and with-restored-interrupts as a local macros. ext:with-restored-interrupts executes the body with interrupts enabled if and only if the ext:without-interrupts was in an environment in which interrupts were allowed. ext:allow-with-interrupts allows the ext:with-interrupts to take effect during the dynamic scope of its body, unless there is an outer ext:without-interrupts without a corresponding ext:allow-with-interrupts. ext:with-local-interrupts executes its body with interrupts enabled provided that for there is an ext:allow-with-interrupts for every ext:without-interrupts surrounding the current one. ext:with-local-interrupts is equivalent to: (allow-with-interrupts (with-interrupts ...)) Care must be taken not to let either ext:allow-with-interrupts or ext:with-local-interrupts appear in a function that escapes from inside the ext:without-interrupts in: (without-interrupts ;; The body of the lambda would be executed with WITH-INTERRUPTS allowed ;; regardless of the interrupt policy in effect when it is called. (lambda () (allow-with-interrupts ...))) (without-interrupts ;; The body of the lambda would be executed with interrupts enabled ;; regardless of the interrupt policy in effect when it is called. (lambda () (with-local-interrupts ...)))