Implement lifetime support in the resource pool
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1 changed files with 108 additions and 40 deletions
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@ -749,6 +749,7 @@
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(let loop ((resources '())
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(available '())
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(waiters (make-q))
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(resources-checkout-count '())
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(resources-last-used '()))
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(match (get-message channel)
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@ -762,11 +763,13 @@
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(loop (cons resource resources)
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available
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waiters
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(cons 0 resources-checkout-count)
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(cons (get-internal-real-time)
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resources-last-used)))
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used)))
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(let ((current-internal-time
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@ -777,6 +780,7 @@
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(loop (cons resource resources)
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(cons resource available)
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waiters
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(cons 0 resources-checkout-count)
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(cons current-internal-time
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resources-last-used)))
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((reply . timeout)
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@ -800,6 +804,7 @@
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(loop (cons resource resources)
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available
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waiters
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(cons 1 resources-checkout-count)
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(cons current-internal-time
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resources-last-used))))))))
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@ -836,10 +841,12 @@
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used))
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(loop resources
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available
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(enq! waiters (cons reply timeout-time))
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resources-checkout-count
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resources-last-used))))
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(if timeout-time
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@ -862,10 +869,21 @@
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(loop resources
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(cdr available)
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waiters
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(let ((resource-index
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(list-index (lambda (x)
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(eq? x (car available)))
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resources)))
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(list-set! resources-checkout-count
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resource-index
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(+ 1 (list-ref
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resources-checkout-count
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resource-index)))
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resources-checkout-count)
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resources-last-used))
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used)))
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(begin
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(put-message reply (cons 'success
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@ -874,6 +892,16 @@
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(loop resources
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(cdr available)
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waiters
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(let ((resource-index
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(list-index (lambda (x)
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(eq? x (car available)))
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resources)))
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(list-set! resources-checkout-count
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resource-index
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(+ 1 (list-ref
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resources-checkout-count
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resource-index)))
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resources-checkout-count)
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resources-last-used)))))
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(((and (or 'return
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@ -892,12 +920,33 @@
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(list-index (lambda (x)
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(eq? x resource))
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resources)))
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(if (and lifetime
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(>= (list-ref resources-checkout-count
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resource-index)
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lifetime))
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(begin
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(spawn-fiber-to-destroy-resource resource)
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used))
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(let waiter-loop ((waiter (safe-deq waiters)))
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(match waiter
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(#f
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(loop resources
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(cons resource available)
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waiters
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(if (eq? 'return-failed-checkout
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return-type)
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(begin
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(list-set! resources-checkout-count
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resource-index
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(- (list-ref resources-checkout-count
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resource-index)
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1))
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resources-checkout-count)
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resources-checkout-count)
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(begin
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(when (eq? return-type 'return)
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(list-set!
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@ -926,12 +975,22 @@
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(loop resources
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available
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waiters
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(if (eq? 'return-failed-checkout
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return-type)
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(begin
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(list-set! resources-checkout-count
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resource-index
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(- (list-ref resources-checkout-count
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resource-index)
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1))
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resources-checkout-count)
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resources-checkout-count)
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(begin
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(list-set!
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resources-last-used
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resource-index
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current-internal-time)
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resources-last-used)))))))
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resources-last-used))))))))
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(('remove resource)
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(let ((index
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@ -954,6 +1013,9 @@
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resources))
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available ; resource shouldn't be in this list
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waiters
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(remove-at-index!
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resources-checkout-count
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index)
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(remove-at-index!
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resources-last-used
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index))))
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@ -964,6 +1026,7 @@
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used))
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(('list-resources reply)
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@ -974,6 +1037,7 @@
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used))
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(('stats reply timeout-time)
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@ -981,6 +1045,7 @@
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`((resources . ,(length resources))
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(available . ,(length available))
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(waiters . ,(q-length waiters))
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(resources-checkout-count . ,resources-checkout-count)
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(checkout-failure-count . ,checkout-failure-count))))
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(spawn-fiber
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@ -1000,6 +1065,7 @@
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used))
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(('check-for-idle-resources)
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@ -1040,6 +1106,7 @@
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(loop resources
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(lset-difference eq? available resources-to-destroy)
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waiters
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resources-checkout-count
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resources-last-used))))
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(('destroy)
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@ -1103,6 +1170,7 @@
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(loop resources
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available
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waiters
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resources-checkout-count
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resources-last-used)))))
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(spawn-fiber
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