Add timeouts to the dc loop in util.scm.

diff --git a/lib/guile/dolcon/util.scm b/lib/guile/dolcon/util.scm
index 30b25c1..bd09a23 100644 (file)
--- a/lib/guile/dolcon/util.scm
+++ b/lib/guile/dolcon/util.scm
@@ -22,6 +22,7 @@
 (define loop-procs '())
 (define fn-procs '())
 (define msg-procs '())
+(define timeouts '())
 
 (define-public dc-fn-update
   (lambda ()
@@ -124,6 +125,13 @@
                  ((msg) (dc-handle-msg))))
              what)))
 
+(define-public dc-timeout
+  (lambda (rel timeout proc)
+    (let* ((tf (gettimeofday))
+          (t (+ (car tf) (/ (cdr tf) 1000000))))
+      (set! timeouts (merge timeouts (list (cons (if rel (+ timeout t) timeout) proc))
+                           (lambda (a b) (< (car a) (car b))))))))
+
 (define-public dc-loop-reg
   (lambda (cmd code proc)
     (set! loop-procs (cons (cons (cons cmd code) proc)
@@ -132,7 +140,12 @@
 (define-public dc-loop
   (lambda ()
     (while #t
-          (dc-select 10000)
+          (dc-select (if (eq? timeouts '())
+                         10000
+                         (let* ((tf (gettimeofday))
+                                (t (+ (car tf) (/ (cdr tf) 1000000)))
+                                (dt (- (caar timeouts) t)))
+                           (if (< dt 0) 0 (truncate (inexact->exact (* dt 1000)))))))
           (while (let ((resp (dc-getresp)))
                    (if resp
                        (let* ((er (dc-extract resp)) (code (cdr (assq 'code er))) (cmd (cdr (assq 'cmd er))))
@@ -144,6 +157,12 @@
                           loop-procs))
                        #f))
                  #f)
+          (while (and (not (eq? timeouts '()))
+                      (let* ((tf (gettimeofday))
+                            (t (+ (car tf) (/ (cdr tf) 1000000))))
+                        (>= t (caar timeouts))))
+                 ((cdar timeouts))
+                 (set! timeouts (cdr timeouts)))
           (for-each (lambda (o)
                       (if (equal? (caar o) ".periodic")
                           ((cdr o))))