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-rw-r--r--scsh-process.scm35
1 files changed, 20 insertions, 15 deletions
diff --git a/scsh-process.scm b/scsh-process.scm
index 1a6c22b..fd7ff3f 100644
--- a/scsh-process.scm
+++ b/scsh-process.scm
@@ -177,21 +177,26 @@
(else (syntax-rules () ((_ val) val))))))
(let ((old-handler (workaround (signal-handler signal/chld))))
(lambda (signal)
- (for-each (lambda (pid)
- (handle-exceptions exn
- ;; User might have waited manually
- (begin (remove-scsh-pending-process! pid) (void))
- (receive (pid ok? status)
- (posix-process-wait pid #t)
- (unless (zero? pid)
- (let ((p (hash-table-ref *scsh-pending-processes* pid)))
- (scsh-process-exit-status-set! p status)
- (scsh-process-ok?-set! p ok?)
- (condition-variable-broadcast!
- (scsh-process-child-condition p))
- ;; The GC can clean it up
- (remove-scsh-pending-process! pid))))))
- (hash-table-keys *scsh-pending-processes*))
+ ;; Run the signal handler in another thread. This is needed
+ ;; because the current thread may be waiting on a condition
+ ;; variable, and we can't wake ourselves up.
+ (thread-start!
+ (lambda ()
+ (for-each (lambda (pid)
+ (handle-exceptions exn
+ ;; User might have waited manually
+ (begin (remove-scsh-pending-process! pid) (void))
+ (receive (pid ok? status)
+ (posix-process-wait pid #t)
+ (unless (zero? pid)
+ (let ((p (hash-table-ref *scsh-pending-processes* pid)))
+ (scsh-process-exit-status-set! p status)
+ (scsh-process-ok?-set! p ok?)
+ (condition-variable-broadcast!
+ (scsh-process-child-condition p))
+ ;; The GC can clean it up
+ (remove-scsh-pending-process! pid))))))
+ (hash-table-keys *scsh-pending-processes*))))
(when old-handler (old-handler signal)))))))
(define (signal-process proc sig)