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-rw-r--r--guix/memoization.scm15
1 files changed, 13 insertions, 2 deletions
diff --git a/guix/memoization.scm b/guix/memoization.scm
index 0201fe4cb3..086c4cdc56 100644
--- a/guix/memoization.scm
+++ b/guix/memoization.scm
@@ -21,7 +21,8 @@
#:use-module (ice-9 match)
#:autoload (srfi srfi-1) (count)
#:use-module (srfi srfi-9)
- #:export (memoize
+ #:export (invalidate-memoization!
+ memoize
mlambda
mlambdaq))
@@ -113,11 +114,21 @@ already-cached result."
(cons cache location))
cache))
(lambda (proc location)
- (make-hash-table))))
+ (let ((table (make-hash-table)))
+ (hashq-set! %memoization-tables proc table)
+ table))))
(define-syntax-rule (make-hash-table* proc)
(%make-hash-table* proc (current-source-location)))
+(define (invalidate-memoization! proc)
+ "Invalidate the memoization cache of PROC."
+ (match (hashq-ref %memoization-tables proc)
+ ((? hash-table? table)
+ (hash-clear! table))
+ (((? cache? cache) . _)
+ (hash-clear! (cache-table cache)))))
+
(define* (show-memoization-tables #:optional (port (current-error-port)))
"Display to PORT statistics about the memoization tables."
(define (cache<? p1 p2)