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trying to stop cleanly

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Hans Dijkema
2026-04-18 15:26:49 +02:00
parent 262859d2ea
commit 472a539133
1 changed files with 35 additions and 24 deletions
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59
racket-webview-qt.rkt
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@@ -577,38 +577,47 @@
) ; close without closing windows
)
(define evt-guard-stop -93273)
(define (start-event-processing)
(thread (λ ()
(letrec
((f
(λ ()
(let ((waiting (sync events-channel)))
(set! waiting (rkt_webview_events_waiting))
;(displayln (format "Events waiting: ~a" waiting))
(while (> waiting 0)
(let* ((rkt-evt (rkt_webview_get_event)))
(if (eq? rkt-evt #f)
(displayln (format "Unexpected: event = nullptr"))
(let* ((data (rkt_data_t-data rkt-evt))
(e (union-ref data 1))
(wv (rkt_evt_t-w e))
(evt (cast (rkt_evt_t-evt e)
_pointer
_string*/utf-8))
)
(rkt_webview_free_data rkt-evt)
;(displayln (format "~a ~a" wv evt))
(if (= wv alive-error-event)
(close-down-on-alive-error)
(let ((cb (hash-ref evt-cb-hash wv #f)))
(unless (eq? cb #f)
(cb evt)))))))
(set! waiting (- waiting 1))
)
(if (= waiting evt-guard-stop)
(begin
(displayln "got evt-guard-stop, exiting event processing")
evt-guard-stop)
(begin
(set! waiting (rkt_webview_events_waiting))
(while (> waiting 0)
(let* ((rkt-evt (rkt_webview_get_event)))
(if (eq? rkt-evt #f)
(displayln (format "Unexpected: event = nullptr"))
(let* ((data (rkt_data_t-data rkt-evt))
(e (union-ref data 1))
(wv (rkt_evt_t-w e))
(evt (cast (rkt_evt_t-evt e)
_pointer
_string*/utf-8))
)
(rkt_webview_free_data rkt-evt)
;(displayln (format "~a ~a" wv evt))
(if (= wv alive-error-event)
(close-down-on-alive-error)
(let ((cb (hash-ref evt-cb-hash wv #f)))
(unless (eq? cb #f)
(cb evt)))))))
(set! waiting (- waiting 1))
)
(f))
)
)
(f))
)
))
(f)))))
(f))))
)
(define evt-processing-thread (start-event-processing))
@@ -813,6 +822,7 @@
(define (rkt-webview-finalizer rkt-wv-store close-windows message)
(displayln "rkt-webview-finalizer active")
(when close-windows
(let ((open-windows (hash->list rkt-wv-store)))
(for-each (λ (kv)
@@ -820,6 +830,7 @@
(handle (cdr kv)))
(rkt-webview-close handle)))
open-windows)))
(event-callback evt-guard-stop)
(rkt_webview_cleanup)
(unless (eq? message #f) (error message))
(stop-event-processing)