CHICKEN Scheme

Summary

srfi-18: (mutex-unlock) Internal scheduler error

Metadata

Id: eae48cca6ff685e9af10d401d27043f098e58ef0
Trac id: 1564
Type: defect
Reporter: megane
Owner:
Cc:
Status: new
Component: extensions
Estimated difficulty:
Resolution:
Priority: major
Milestone: 6.0.0
Version: 5.0.0
Changetime: 2023-11-06 22:11:53 UTC
Created: 2018-11-30 10:26:07 UTC
Keywords: scheduler threads

Description

 (import srfi-18)
 (import (chicken random))
 
 (define m (make-mutex))
 (define (rt) (/ (pseudo-random-integer 100) 1000))
 (define (y)
   (let lp4 ()
     (unless (= 0 (pseudo-random-integer 10))
       (print (current-thread) " " "yield")
       (thread-yield!)
       (lp4))))
 
 (thread-start!
  (make-thread (lambda ()
                 (let lp ()
                   (print (current-thread) " " "lock")
                   (mutex-lock! m (rt))
                   (print (current-thread) " " "unlock")
                   (mutex-unlock! m)
                   (y)
                   (lp)))))
 
 (let lp2 ()
   (print (current-thread) " " "lock")
   (mutex-lock! m (rt))
   (print (current-thread) " " "sleep")
   (thread-sleep! (rt))
   (print (current-thread) " " "unlock")
   (mutex-unlock! m)
   (lp2))
 



 Warning (#<thread: thread1>): in thread: (mutex-unlock) Internal scheduler error: unknown thread state
 #<thread: primordial>
 ready
 
         Call history:
 
         t.scm:7: chicken.random#pseudo-random-integer
         t.scm:7: scheme#/
         t.scm:19: srfi-18#mutex-lock!
         t.scm:20: srfi-18#current-thread
         t.scm:20: chicken.base#print
         t.scm:21: srfi-18#mutex-unlock!         <--
 #