B4J Question CallSubPlus: OutOfMemoryError

HARRY

Active Member
Licensed User
Longtime User
In a For/Next loop I have to set an IO-Port High and after a while (say 5 msec) to set it Low again. I tried it as follows:
B4X:
Sub DoStep
    CSU.CallSubPlus(Me,"StepUp",5)
    CSU.CallSubPlus(Me,"StepDown",5)
End Sub
Sub StepUp
    PStep.State=True   
End Sub

Sub StepDown
    PStep.State=False
End Sub

After a while I get the following error info:
B4X:
java.lang.OutOfMemoryError: unable to create new native thread
    at java.lang.Thread.start0(Native Method)
    at java.lang.Thread.start(Thread.java:714)
    at anywheresoftware.b4a.objects.Timer.startTicking(Timer.java:68)
    at anywheresoftware.b4a.objects.Timer.setEnabled(Timer.java:77)
    at b4j.example.callsubutils._plusimpl(callsubutils.java:153)
    at b4j.example.callsubutils._callsubplus2(callsubutils.java:167)
    at b4j.example.callsubutils._callsubplus(callsubutils.java:81)
    at b4j.example.main._dostep(main.java:124)
    at b4j.example.main._scan(main.java:290)
    at b4j.example.main._stream2_newtext(main.java:426)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:625)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.j
ava:237)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:168)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:94)
    at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:487)
    at anywheresoftware.b4a.keywords.Common.access$0(Common.java:467)
    at anywheresoftware.b4a.keywords.Common$CallSubDelayedHelper.run(Common.java:541)
    at anywheresoftware.b4a.keywords.SimpleMessageLoop.runMessageLoop(SimpleMessageLoop.java:30)
    at anywheresoftware.b4a.StandardBA.startMessageLoop(StandardBA.java:26)
    at anywheresoftware.b4a.ShellBA.startMessageLoop(ShellBA.java:115)
    at anywheresoftware.b4a.keywords.Common.StartMessageLoop(Common.java:153)
    at anywheresoftware.
b4a.shell.Shell.raiseEventImpl(Shell.java:308)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:168)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:94)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
    at b4j.example.main.main(main.java:29)
Fout op regel: 47 (CallSubUtils)
java.lang.RuntimeException: java.lang.RuntimeException: java.lang.OutOfMemoryError: unable to create new native thread
    at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:496)
    at anywheresoftware.b4a.keywords.Common.access$0(Common.java:467)
    at anywheresoftware.b4a.keywords.Common$CallSubDelayedHelper.run(Common.java:541)
    at anywheresoftware.b4a.keywords.SimpleMessageLoop.runMessageLoop(SimpleMessageLoop.java:30)
    at anywheresoftware.b4a.StandardBA.startMessageLoop(StandardBA.java:26)
    at anywheresoftware.b4a.ShellBA.startMessageLoop(ShellBA.java:115)
    at anywheresoftware.b4a.keywords.Common.StartMessageLoop(Common.java:153)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:308)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:168)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.l
ang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:94)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
    at b4j.example.main.main(main.java:29)
Caused by: java.lang.RuntimeException: java.lang.OutOfMemoryError: unable to create new native thread
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:119)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:94)
    at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:487)
    ... 16 more
Caused by: java.lang.OutOfMemoryError: unable to create new native thread
    at java.lang.Thread.start0(Native Method)
    at java.lang.Thread.start(Thread.java:714)
    at anywheresoftware.b4a.objects.Timer.startTicking(Timer.java:68)
    at anywheresoftware.b4a.objects.Timer.setEnabled(Timer.java:77)
    at b4j.example.callsubutils._plusimpl(callsubutils.java:153)
    at b4j.example.callsubutils._callsubplus2(callsubutils.java:167)
    at b4j.example.callsubutils._callsubplus(callsubutils.jav
a:81)
    at b4j.example.main._dostep(main.java:124)
    at b4j.example.main._scan(main.java:290)
    at b4j.example.main._stream2_newtext(main.java:426)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:625)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:237)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:168)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
    ... 18 more
java.lang.RuntimeException: java.util.NoSuchElementException
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:119)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:94)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
    at b4j.example.main.main(main.java:29)
Caused by: java.util.NoSuchElementException
    at java.util.LinkedList.removeFirst(LinkedList.java:270)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:327)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:168)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
    ... 3 more
Program terminated (StartMessageLoop was not called).

I also tried to use Sleep, but then, as far as I understand, the For/Next loop is continued while Sleeping. Of course I could use a time consuming loop, but the cpu has to run also another program, so that is not really an option.

Any suggestion?

Harry
 

HARRY

Active Member
Licensed User
Longtime User
Sorry Erel,

That doesn't work. The For Next is:
B4X:
For stepsdone = 0 To stepstodo -1 Step 1
        DoStep
    Next
.
B4X:
Sub DoStep
    Sleep(5)
     StepUp
     Sleep(5)
     StepDown
End Sub

When running the first Sleep(5) is executed and then the next DoStep is activated. StepUp is never called. In fact I need an 'old' Sleep, not resumable.

Harry
 
Upvote 0

XbNnX_507

Active Member
Licensed User
I think this should help
B4X:
For stepsdone = 0 To stepstodo -1 Step 1
       wait for (   DoStep ) Complete
Next
Sub DoStep as resumablesub
    Sleep(5)
     StepUp
     Sleep(5)
     StepDown
     return 
End Sub
 
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