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Doc tweaks for ev/deadline and ev/with-deadline

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sogaiu 2024-02-20 21:59:37 +09:00
parent 03ae2ec153
commit 592ac4904c
2 changed files with 21 additions and 8 deletions
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16
src/boot/boot.janet
View File

@ -3736,12 +3736,20 @@
~(,ev/thread (fn _spawn-thread [&] ,;body) nil :n))
(defmacro ev/with-deadline
`Run a body of code with a deadline, such that if the code does not complete before
the deadline is up, it will be canceled.`
[deadline & body]
``
Create a fiber to execute `body`, schedule the event loop to cancel
the task (root fiber) associated with `body`'s fiber, and start
`body`'s fiber by resuming it.
The event loop will try to cancel the root fiber if `body`'s fiber
has not completed after at least `sec` seconds.
`sec` is a number that can have a fractional part.
``
[sec & body]
(with-syms [f]
~(let [,f (coro ,;body)]
(,ev/deadline ,deadline nil ,f)
(,ev/deadline ,sec nil ,f)
(,resume ,f))))
(defn- cancel-all [chan fibers reason]

13
src/core/ev.c
View File

@ -2952,10 +2952,15 @@ JANET_CORE_FN(cfun_ev_sleep,
JANET_CORE_FN(cfun_ev_deadline,
"(ev/deadline sec &opt tocancel tocheck)",
"Set a deadline for a fiber `tocheck`. If `tocheck` is not finished after `sec` seconds, "
"`tocancel` will be canceled as with `ev/cancel`. "
"If `tocancel` and `tocheck` are not given, they default to `(fiber/root)` and "
"`(fiber/current)` respectively. Returns `tocancel`.") {
"Schedules the event loop to try to cancel the `tocancel` "
"task as with `ev/cancel`. After `sec` seconds, the event "
"loop will attempt cancellation of `tocancel` if the "
"`tocheck` fiber is resumable. `sec` is a number that can "
"have a fractional part. `tocancel` defaults to "
"`(fiber/root)`, but if specified, must be a task (root "
"fiber). `tocheck` defaults to `(fiber/current)`, but if "
"specified, should be a fiber. Returns `tocancel` "
"immediately.") {
janet_arity(argc, 1, 3);
double sec = janet_getnumber(argv, 0);
JanetFiber *tocancel = janet_optfiber(argv, argc, 1, janet_vm.root_fiber);