store: Allow objects in the cache to be inserted and search for with 'equal?'.
* guix/store.scm (cache-object-mapping): Add #:vhash-cons parameter and honor it. (lookup-cached-object): Add #:vhash-fold* parameter and honor it. (%mcached): Add #:vhash-fold* and #:vhash-cons and honor them. (mcached): Add clauses with 'eq?' and 'equal?' as the first argument.
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@ -1612,10 +1612,11 @@ This makes sense only when the daemon was started with '--cache-failures'."
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;; from %STATE-MONAD.
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(template-directory instantiations %store-monad)
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(define* (cache-object-mapping object keys result)
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(define* (cache-object-mapping object keys result
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#:key (vhash-cons vhash-consq))
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"Augment the store's object cache with a mapping from OBJECT/KEYS to RESULT.
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KEYS is a list of additional keys to match against, for instance a (SYSTEM
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TARGET) tuple.
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TARGET) tuple. Use VHASH-CONS to insert OBJECT into the cache.
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OBJECT is typically a high-level object such as a <package> or an <origin>,
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and RESULT is typically its derivation."
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@ -1623,8 +1624,8 @@ and RESULT is typically its derivation."
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(values result
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(store-connection
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(inherit store)
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(object-cache (vhash-consq object (cons result keys)
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(store-connection-object-cache store)))))))
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(object-cache (vhash-cons object (cons result keys)
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(store-connection-object-cache store)))))))
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(define record-cache-lookup!
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(if (profiled? "object-cache")
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@ -1653,11 +1654,12 @@ and RESULT is typically its derivation."
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(lambda (x y)
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#t)))
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(define* (lookup-cached-object object #:optional (keys '()))
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(define* (lookup-cached-object object #:optional (keys '())
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#:key (vhash-fold* vhash-foldq*))
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"Return the cached object in the store connection corresponding to OBJECT
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and KEYS. KEYS is a list of additional keys to match against, and which are
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compared with 'equal?'. Return #f on failure and the cached result
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otherwise."
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and KEYS; use VHASH-FOLD* to look for OBJECT in the cache. KEYS is a list of
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additional keys to match against, and which are compared with 'equal?'.
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Return #f on failure and the cached result otherwise."
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(lambda (store)
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(let* ((cache (store-connection-object-cache store))
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@ -1665,33 +1667,50 @@ otherwise."
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;; the whole vlist chain and significantly reduces the number of
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;; 'hashq' calls.
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(value (let/ec return
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(vhash-foldq* (lambda (item result)
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(match item
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((value . keys*)
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(if (equal? keys keys*)
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(return value)
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result))))
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#f object
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cache))))
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(vhash-fold* (lambda (item result)
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(match item
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((value . keys*)
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(if (equal? keys keys*)
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(return value)
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result))))
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#f object
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cache))))
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(record-cache-lookup! value cache)
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(values value store))))
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(define* (%mcached mthunk object #:optional (keys '()))
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(define* (%mcached mthunk object #:optional (keys '())
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#:key
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(vhash-cons vhash-consq)
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(vhash-fold* vhash-foldq*))
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"Bind the monadic value returned by MTHUNK, which supposedly corresponds to
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OBJECT/KEYS, or return its cached value."
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(mlet %store-monad ((cached (lookup-cached-object object keys)))
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OBJECT/KEYS, or return its cached value. Use VHASH-CONS to insert OBJECT into
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the cache, and VHASH-FOLD* to look it up."
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(mlet %store-monad ((cached (lookup-cached-object object keys
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#:vhash-fold* vhash-fold*)))
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(if cached
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(return cached)
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(>>= (mthunk)
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(lambda (result)
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(cache-object-mapping object keys result))))))
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(cache-object-mapping object keys result
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#:vhash-cons vhash-cons))))))
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(define-syntax-rule (mcached mvalue object keys ...)
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"Run MVALUE, which corresponds to OBJECT/KEYS, and cache it; or return the
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(define-syntax mcached
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(syntax-rules (eq? equal?)
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"Run MVALUE, which corresponds to OBJECT/KEYS, and cache it; or return the
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value associated with OBJECT/KEYS in the store's object cache if there is
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one."
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(%mcached (lambda () mvalue)
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object (list keys ...)))
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((_ eq? mvalue object keys ...)
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(%mcached (lambda () mvalue)
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object (list keys ...)
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#:vhash-cons vhash-consq
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#:vhash-fold* vhash-foldq*))
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((_ equal? mvalue object keys ...)
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(%mcached (lambda () mvalue)
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object (list keys ...)
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#:vhash-cons vhash-cons
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#:vhash-fold* vhash-fold*))
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((_ mvalue object keys ...)
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(mcached eq? mvalue object keys ...))))
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(define (preserve-documentation original proc)
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"Return PROC with documentation taken from ORIGINAL."
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