diff options
Diffstat (limited to 'guix/build/syscalls.scm')
| -rw-r--r-- | guix/build/syscalls.scm | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index 04fbebb8a2..3af41f2cf5 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -1083,17 +1083,19 @@ exception if it's already taken." (close-port port) #t) -(define-syntax-rule (with-file-lock file exp ...) - "Wait to acquire a lock on FILE and evaluate EXP in that context." +(define (call-with-file-lock file thunk) (let ((port (lock-file file))) (dynamic-wind (lambda () #t) - (lambda () - exp ...) + thunk (lambda () (unlock-file port))))) +(define-syntax-rule (with-file-lock file exp ...) + "Wait to acquire a lock on FILE and evaluate EXP in that context." + (call-with-file-lock file (lambda () exp ...))) + ;;; ;;; Miscellaneous, aka. 'prctl'. |