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Get own threadID without passing as parameter

https://www.purebasic.fr/english/viewtopic.php?t=75222

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Re: Get own threadID without passing as parameter

Posted: Fri May 01, 2020 5:28 pm
by NicTheQuick
I still do not get why you want to know the thread's handle inside the thread.

You do not need to kill the thread by itself. It simply can return.
You do not need to check if it is running, because if it is not running you can not even check this.
You do not need to pause the thread from inside. For this you can use locks (CreateMutex()).
And if the thread is paused you can not resume it from inside because ehhm... it's paused.

So what is your idea behind that?

Also here is an OS independent version using some wrapper procedures with very little constant overhead:

Code: Select all

EnableExplicit

Prototype.i threadFunction(*data)

Structure ThreadInfo
	*data
	proc.threadFunction
	mutex.i
	threadId.i
EndStructure

Threaded _myThreadId.i

Procedure ThreadWrapper_(*threadInfo.ThreadInfo)
	With *threadInfo
		LockMutex(\mutex)
		_myThreadId = \threadId
		UnlockMutex(\mutex)
		\proc(\data)
		FreeMutex(\mutex)
	EndWith
	FreeStructure(*threadInfo)
EndProcedure

Procedure CreateThread_(proc.threadFunction, *data)
	Protected *threadInfo.ThreadInfo = AllocateStructure(ThreadInfo)
	With *threadInfo
		\data = *data
		\proc = proc
		\mutex = CreateMutex()
		LockMutex(\mutex)
		\threadId = CreateThread(@ThreadWrapper_(), *threadInfo)
		UnlockMutex(\mutex)
		ProcedureReturn \threadId
	EndWith
EndProcedure

;----------------------------------------------
; Now just use CreateThread_() instead of CreateThread()
; and retrieve the thread ID returned from CreateThread()
; inside the thread using the global variable _myThreadId

Procedure MyThread(dummy.i)
	Debug "inside thread: " + _myThreadId
EndProcedure

Define thread.i = CreateThread_(@MyThread(), 0)

Debug "outside thread: " + thread

Delay(100)

Re: Get own threadID without passing as parameter

Posted: Fri May 01, 2020 8:19 pm
by LiK137
NicTheQuick, Thanks very much.
In fact, I need to link ClientID, cmdID and ThreadHandle together from inside threadprocedure.
Thread must get it's handle, get cmdID bundled with him and process instruction.
GUI is going to work apart from Device being attached to server on localhost.
if GUI not responds or fails it just been disconnected but not stops or hangs device.

The treaded variable in your provided solution also I do not think possible to realize.
Same procedure is initialized for each cmd so single treaded variable cannot be evaluated under this condition.

I am going to use Shardik's solution by linking handle, threadID, cmdID and ClientID together to make possible to lookup cmdID of ClientID of ThreadID

Thank You very much

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 1:16 am
by NicTheQuick
LiK137 wrote:The treaded variable in your provided solution also I do not think possible to realize.
Same procedure is initialized for each cmd so single treaded variable cannot be evaluated under this condition.

I am going to use Shardik's solution by linking handle, threadID, cmdID and ClientID together to make possible to lookup cmdID of ClientID of ThreadID

Thank You very much
Sorry. I am not sure if I understand you correctly because your English seems a bit broken but it is also not my mother tongue. So maybe it's also myfault.

So you mean because the same procedure (in this case ThreadWrapper_()) is used for every created thread, the variable '_myThreadId' can not be used? That's wrong. Variables declared with the 'Threaded' keyword are unique for every thread. Because 'ThreadWrapper_()' is already running in a new thread there will be no race condition at all. My code is functional and safe.

But of course Shardik's code works as well and is more elegant if you only want to run on Windows. You also could bundle the versions of the different operating systems into one module or procedure and post it in the Tricks 'n' Tips section. :wink:

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 10:09 am
by LiK137
NicTheQuick,
Once upon a time a man was cleaning his ears and mute the world (In which post You think my English got broken?, may be we both should take English course?)

I am posting my test code which will be then used after all bugs in my code corrected. The code may have incorrect usage of mutex or semaphore as I am not familiar with them very well.

Server.pb

Code: Select all

Global tmpCounter

Global Semaphore = CreateSemaphore()
Global Mutex     = CreateMutex()

Import ""
  GetThreadId(ThreadHandle.I)
EndImport

Structure TParseData
  XPath.s
  XMD.s
  *XData
EndStructure
Structure TCMDo
  *srv.TServer
  clID.i
  cmdID.i 
EndStructure

Structure TCMData
  szData.i
  pathData.s
  *memData
EndStructure
Structure TCMDef
  cmdParentID.i
  cmdID.i
  CMD.s
  inData.TCMData
  outData.TCMData
  CMDState.i
  clID.i
EndStructure
Structure TClient
  clID.i
  IP.s
  Port.l
  connStat.b
  thdID.i
  exiThd.b
  CMD.TCMDef
EndStructure
Structure TServer
  srvID.i
  Port.l
  Protocol.l
  IPv.l
  interfaceIP.s
  Map Clients.TClient()
EndStructure

#DataBuff = 1024

Declare thdCMDo(*srv.TServer)

Procedure INITsrv(*srv.TServer)
  InitNetwork()
  UseMD5Fingerprint()
  
  Protected hThread
  Protected srvMod, SERVent, ServerID, ClientID
  Protected *Buffer0 = AllocateMemory(#DataBuff),
            DoneQty, StepQty

  
  
  If *srv\Port > 0 And *srv\Port < 65000
    If *srv\Protocol = #PB_Network_TCP Or *srv\Protocol = #PB_Network_UDP
      If *srv\IPv = #PB_Network_IPv4 Or *srv\IPv = #PB_Network_IPv6
        srvMod = *srv\Protocol | *srv\IPv
      Else  
        srvMod = *srv\Protocol
      EndIf
    Else   
      srvMod = #PB_Network_TCP | #PB_Network_IPv4
    EndIf
    
    If *srv\interfaceIP = ""
      *srv\srvID = CreateNetworkServer(#PB_Any, *srv\Port,  srvMod)
    Else
      *srv\srvID = CreateNetworkServer(#PB_Any, *srv\Port,  srvMod, *srv\interfaceIP)
    EndIf
    
    Repeat
      
      SERVent = NetworkServerEvent()
          
        Select SERVent
           
          Case #PB_NetworkEvent_None
            Delay(10)
            
          Case #PB_NetworkEvent_Connect     ;- #PB_NetworkEvent_Connect
            ServerID  = EventServer()
            ClientID  = EventClient()    
            
            LockMutex(Mutex)
            *srv\Clients(Str(ClientID))\clID                = ClientID
            *srv\Clients(Str(ClientID))\IP                  = IPString(GetClientIP(ClientID), #PB_Network_IPv4)
            *srv\Clients(Str(ClientID))\Port                = GetClientPort(ClientID)
            *srv\Clients(Str(ClientID))\CMD\clID            = ClientID
            *srv\Clients(Str(ClientID))\CMD\inData\memData  = AllocateMemory(#DataBuff)
            *srv\Clients(Str(ClientID))\CMD\outData\memData = AllocateMemory(#DataBuff)
            
            *srv\Clients(Str(ClientID))\connStat = #True
            UnlockMutex(Mutex)
            
          Case #PB_NetworkEvent_Disconnect  ;- #PB_NetworkEvent_Disconnect
            ServerID  = EventServer()
            ClientID  = EventClient()    
            
            LockMutex(Mutex)
            *srv\Clients(Str(ClientID))\connStat =  #False
            UnlockMutex(Mutex)
            
;{ TestPurpose
;             If FindMapElement(*srv\Clients(), Str(ClientID))
;               FreeMemory(*srv\Clients(Str(ClientID))\CMD\inData\memData)
;               FreeMemory(*srv\Clients(Str(ClientID))\CMD\outData\memData)
;               DeleteMapElement(*srv\Clients(), Str(ClientID))
;             EndIf  
;             
;             If FindMapElement(*srv\Clients(), Str(ClientID))
;               Debug "Found but shouldnt: " + *srv\Clients(Str(ClientID))\clID
;             Else
;               Debug "DeleteMapOK"
;             EndIf  
;             
;             If MapSize(*srv\Clients()) = 0
;               Debug "OK"  
;             EndIf  
;}            
              
          Case #PB_NetworkEvent_Data        ;- #PB_NetworkEvent_Data
            ServerID  = EventServer()
            ClientID  = EventClient()    
            
            If FindMapElement(*srv\Clients(), Str(ClientID))
              
              DoneQty = 0
              StepQty = 0
              
              Repeat
              
                Qty = ReceiveNetworkData(ClientID, *Buffer0, #DataBuff) ; take the coins
                
                If Qty > 0
                  DoneQty + Qty
                  
                  LockMutex(Mutex)
                  
                  If DoneQty >= MemorySize(*srv\Clients(Str(ClientID))\CMD\inData\memData) ; bank is not empty ?
                    *srv\Clients(Str(ClientID))\CMD\inData\memData = ReAllocateMemory(*srv\Clients(Str(ClientID))\CMD\inData\memData, MemorySize(*srv\Clients(Str(ClientID))\CMD\inData\memData) + #DataBuff)
                  EndIf
                  CopyMemory(*Buffer0, *srv\Clients(Str(ClientID))\CMD\inData\memData + StepQty, Qty)
                  
                  UnlockMutex(Mutex)
                  
                  StepQty + Qty
                  
                EndIf
              
              Until Qty <= 0 ; quit if bank is empty
              
              *srv\Clients(Str(ClientID))\CMD\inData\szData = DoneQty
              FillMemory(*Buffer0, #DataBuff, 0, #PB_Byte)
              
              hThread = CreateThread(@thdCMDo(), *srv)
              LockMutex(Mutex)
                *srv\Clients(Str(ClientID))\thdID = GetThreadID(ThreadID(hThread))
              UnlockMutex(Mutex)
;             Debug "Internal thdID: " + *srv\Clients(Str(ClientID))\thdID
              
            EndIf  
            
        EndSelect
    ForEver  
      
    ProcedureReturn #True
  EndIf  
  
  ProcedureReturn #False
EndProcedure
Procedure thdCMDo(*srv.TServer)
  
  Protected thdID = GetCurrentThreadId_()
  Protected clID
  Protected CounterTMP = tmpCounter
  
  Protected *cpSrv.TServer =  AllocateMemory(SizeOf(TServer));AllocateStructure(TServer)
  InitializeStructure(*cpSrv, TServer)
  
  Delay(1000)
  
  LockMutex(Mutex)
    CopyStructure(*srv, *cpSrv, TServer)
  UnlockMutex(Mutex)
    
  Delay(1000)
  Repeat
    ForEach *cpSrv\Clients()
      If MapKey(*cpSrv\Clients()) <> "" 
        If thdID = *cpSrv\Clients()\thdID
          clID = *cpSrv\Clients()\clID
          tmpCounter + 1
          Debug Str(tmpCounter) + " Found for client: " + clID
          Debug "Data for Client: " + Str(clID) + " | " + PeekS(*cpSrv\Clients(Str(clID))\CMD\inData\memData, *cpSrv\Clients(Str(clID))\CMD\inData\szData, #PB_Unicode) + "|"
          Break 2
        EndIf  
      EndIf  
    Next  
  Until tmpCounter <> CounterTMP

  Debug "Last found element for client: " + Str(*cpSrv\Clients(Str(clID))\clID) + " is: " + tmpCounter
  
  ClearStructure(*cpSrv, TServer)
  Debug "chkIfClear Interface: " + *cpSrv\interfaceIP
;   FreeStructure(*cpSrv.TServer)
    
    
EndProcedure  


Define *srv.TServer = AllocateMemory(SizeOf(TServer));AllocateStructure(TServer)
InitializeStructure(*srv, TServer)
*srv\Port = 8888
*srv\Protocol = #PB_Network_TCP
*srv\interfaceIP = "127.0.0.1"
Define MainTHD = CreateThread(@INITsrv(), *srv)
Repeat
  Delay(10)
ForEver
Client.pb

Code: Select all

Procedure Cli()
  
  If InitNetwork() = 0
    MessageRequester("Error", "Can't initialize the network !", 0)
    End
  EndIf
  
  
  #String = "TEST"
  *String = AllocateMemory(StringByteLength("TEST", #PB_Unicode)+2)
  PokeS(*String, #String, StringByteLength("TEST", #PB_Unicode), #PB_Unicode)
  
  UseMD5Fingerprint()
  Debug Fingerprint(*String, StringByteLength("TEST", #PB_Unicode), #PB_Cipher_MD5)
  
  #cliPort = 8888;6832
  
  #ConSize = 10000
  
  Dim Connexn(#ConSize)
  
  Debug "Connecting"
  For i = 1 To #ConSize
  
    Connexn(i) = OpenNetworkConnection("127.0.0.1", #cliPort, #PB_Network_TCP)
    
  Next
  
  
  Debug "SendDataFull"
  For i = 1 To #ConSize

    If Connexn(i) And ConnectionID(Connexn(i))
      
      SendNetworkData(Connexn(i), *String, StringByteLength("TEST", #PB_Unicode))
      
    EndIf
    
  Next
  
  
  Debug "SendDataShort"
  For i = 1 To 10

    If Connexn(i) And ConnectionID(Connexn(i))
      
      SendNetworkData(Connexn(i), *String, StringByteLength("TEST", #PB_Unicode))
      
    EndIf
    
  Next
  
  
  Debug "Disconnect"
  For i = 1 To #ConSize
    
    If Connexn(i) And ConnectionID(Connexn(i))
      
      CloseNetworkConnection(Connexn(i))
     
    EndIf
    
  Next

EndProcedure

Cli()
little bit shortened

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 11:14 am
by infratec
A first hint:

Code: Select all

Define srv.TServer

InitNetwork()

srv\Port = 8888
srv\Protocol = #PB_Network_TCP
srv\interfaceIP = "127.0.0.1"
srv\Mutex = CreateMutex()

srv\Thread = CreateThread(@INITsrv(), @srv)
Repeat
  Delay(10)
ForEver

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 11:29 am
by LiK137
Could you please explain the advantages of @srv over *srv ?
Is it more crashproof or faster to access or more safe?
Thank You in advance

Applied changes according Your hints but would like to know difference

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 11:58 am
by infratec
My server version:

Code: Select all

EnableExplicit

#DataBuffSize = 1024


Structure TCMDataStructure
  szData.i
  pathData.s
  *memData
EndStructure

Structure TClientStructure
  Thread.i
  clID.i
  IP.i
  Port.i
  LastTime.i
  Mutex.i
  Disconnected.i
  ThreadDone.i
  List TCMDataList.TCMDataStructure()
EndStructure

Structure TServerStructure
  Thread.i
  Mutex.i
  srvID.i
  Port.i
  Protocol.i
  IPv.i
  interfaceIP.s
  Map ClientMap.TClientStructure()
EndStructure


Procedure thdCMDo(*TClient.TClientStructure)
  
  Protected Recv$
  
  LockMutex(*TClient\Mutex)
  If *TClient\Disconnected
    *TClient\ThreadDone = #True
  Else
    ForEach *TClient\TCMDataList()
      Recv$ + PeekS(*TClient\TCMDataList()\memData, *TClient\TCMDataList()\szData, #PB_UTF8|#PB_ByteLength)
      FreeMemory(*TClient\TCMDataList()\memData)
      DeleteElement(*TClient\TCMDataList())
    Next 
    Debug "Data for Client: " + Str(*TClient\clID) + " | " + Recv$ + "|"
  EndIf
  UnlockMutex(*TClient\Mutex)
  
EndProcedure 




Procedure INITsrv(*srv.TServerStructure)
  
  Protected.i hThread, srvMod, SERVent, ServerID, ClientID, Qty, DoneQty, StepQty
  Protected *Buffer0, *TClient.TClientStructure
  
  
  If *srv\Port > 0 And *srv\Port < 65000
    If *srv\Protocol = #PB_Network_TCP Or *srv\Protocol = #PB_Network_UDP
      If *srv\IPv = #PB_Network_IPv4 Or *srv\IPv = #PB_Network_IPv6
        srvMod = *srv\Protocol | *srv\IPv
      Else
        srvMod = *srv\Protocol
      EndIf
    Else
      srvMod = #PB_Network_TCP | #PB_Network_IPv4
    EndIf
    
    If *srv\interfaceIP = ""
      *srv\srvID = CreateNetworkServer(#PB_Any, *srv\Port,  srvMod)
    Else
      *srv\srvID = CreateNetworkServer(#PB_Any, *srv\Port,  srvMod, *srv\interfaceIP)
    EndIf
    
    
    Repeat
      
      SERVent = NetworkServerEvent()
      Select SERVent
          
        Case #PB_NetworkEvent_None
          Delay(10)
          
        Case #PB_NetworkEvent_Connect     ;- #PB_NetworkEvent_Connect
          ClientID  = EventClient()   
          
          Debug "Connection: " + Str(ClientID)
          
          LockMutex(*srv\Mutex)
          *TClient = FindMapElement(*srv\ClientMap(), Str(ClientID))
          If *TClient = #Null
            *TClient = AddMapElement(*srv\ClientMap(), Str(ClientID))
            UnlockMutex(*srv\Mutex)
            If *TClient
              *TClient\Mutex    = CreateMutex()
              *TClient\clID     = ClientID
              *TClient\IP       = GetClientIP(ClientID)
              *TClient\Port     = GetClientPort(ClientID)
              *TClient\LastTime = Date()
            EndIf
          Else
            UnlockMutex(*srv\Mutex)
            *TClient\LastTime = Date()
          EndIf
          
        Case #PB_NetworkEvent_Disconnect  ;- #PB_NetworkEvent_Disconnect
          ClientID  = EventClient()
          
          LockMutex(*srv\Mutex)
          *TClient = FindMapElement(*srv\ClientMap(), Str(ClientID))
          If *TClient
            Debug "Disconnect : " + Str(ClientID)
            LockMutex(*TClient\Mutex)
            If *TClient\Thread  ; already data received
              *TClient\Disconnected = #True
              UnlockMutex(*TClient\Mutex)
            Else
              UnlockMutex(*TClient\Mutex)
              FreeMutex(*TClient\Mutex)
              DeleteMapElement(*srv\ClientMap(), Str(ClientID))
            EndIf
          EndIf
          UnlockMutex(*srv\Mutex)
          
        Case #PB_NetworkEvent_Data        ;- #PB_NetworkEvent_Data
          ClientID  = EventClient()   
          
          LockMutex(*srv\Mutex)
          *TClient = FindMapElement(*srv\ClientMap(), Str(ClientID))
          If *TClient
            *TClient\LastTime = Date()
            
            LockMutex(*TClient\Mutex)
            Repeat
              If AddElement(*TClient\TCMDataList())
                *TClient\TCMDataList()\memData = AllocateMemory(#DataBuffSize, #PB_Memory_NoClear)
                If *TClient\TCMDataList()\memData
                  *TClient\TCMDataList()\szData = ReceiveNetworkData(ClientID, *TClient\TCMDataList()\memData, #DataBuffSize)
                  If *TClient\TCMDataList()\szData <= 0
                    FreeMemory(*TClient\TCMDataList()\memData)
                    DeleteElement(*TClient\TCMDataList())
                  EndIf
                Else
                  DeleteElement(*TClient\TCMDataList())
                EndIf
              Else
                Break
              EndIf
            Until *TClient\TCMDataList()\szData < #DataBuffSize
            
            If ListSize(*TClient\TCMDataList())
              *TClient\ThreadDone = #False
              *TClient\Thread = CreateThread(@thdCMDo(), *TClient)
            EndIf
            UnlockMutex(*TClient\Mutex)
            
          EndIf
          UnlockMutex(*srv\Mutex)
          
      EndSelect
    ForEver 
    
  EndIf 
  
EndProcedure






Define srv.TServerStructure, MaxTimeWithoutData.i

InitNetwork()

srv\Port = 8888
srv\Protocol = #PB_Network_TCP
srv\interfaceIP = "127.0.0.1"
srv\Mutex = CreateMutex()

srv\Thread = CreateThread(@INITsrv(), @srv)
Repeat
  
  Delay(10000)  ; sleep 10 seconds
  
  MaxTimeWithoutData = Date() - 300 ; 5 minutes
  If TryLockMutex(srv\Mutex)
    ForEach srv\ClientMap()
      If srv\ClientMap()\LastTime < MaxTimeWithoutData Or (srv\ClientMap()\Disconnected And srv\ClientMap()\ThreadDone)
        Debug "Main Delete: " + Str(srv\ClientMap()\clID)
        LockMutex(srv\ClientMap()\Mutex)
        ForEach(srv\ClientMap()\TCMDataList())
          FreeMemory(srv\ClientMap()\TCMDataList()\memData)
        Next
        ResetList(srv\ClientMap()\TCMDataList())
        UnlockMutex(srv\ClientMap()\Mutex)
        FreeMutex(srv\ClientMap()\Mutex)
        DeleteMapElement(srv\ClientMap())
      EndIf
    Next
    UnlockMutex(srv\Mutex)
  EndIf
ForEver
You need no AllocateMemory() ... :wink:

I changed the transmitted strings to UTF8 because it's faster.

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 12:04 pm
by infratec
Improved the code above.

Errorhandling if ReceiveBNetworkData() results in <= 0

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 12:08 pm
by infratec
Improved the code above.

Forgot to free the receive memory if disconnevt or timeout reached.

Normally you get no disconnect event.

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 12:19 pm
by LiK137

Code: Select all

        Case #PB_NetworkEvent_Disconnect  ;- #PB_NetworkEvent_Disconnect
          ClientID  = EventClient()
          ForEach(*srv\ClientMap()\TCMDataList())                                                           ;Line:96
            FreeMemory(*srv\ClientMap()\TCMDataList()\memData)
          Next
          LockMutex(*srv\Mutex)
          DeleteMapElement(*srv\ClientMap(), Str(ClientID))
          UnlockMutex(*srv\Mutex)
[15:14:09] [ERROR] LiKliSer.pbi (Line: 96)
[15:14:09] [ERROR] Invalid memory access. (read error at address 28)
[15:14:24] The Program was killed.

Now There is such error

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 12:35 pm
by infratec
Improved code above.

New Mutex for locking if disconnect is faster than output.

Client:

Code: Select all

#String = "TEST "
#cliPort = 8888
#ConSize = 10000


Procedure Cli()
  
  Dim Connexn(#ConSize)
  
  Debug "Connecting"
  For i = 1 To #ConSize
    Connexn(i) = OpenNetworkConnection("127.0.0.1", #cliPort, #PB_Network_TCP)
  Next
  
  
  Debug "SendDataFull"
  For i = 1 To #ConSize
    If Connexn(i) And ConnectionID(Connexn(i))
      SendNetworkString(Connexn(i), #String + Str(i), #PB_UTF8)
    EndIf
  Next
  
  
  Debug "SendDataShort"
  For i = 1 To 10
    If Connexn(i) And ConnectionID(Connexn(i))
      SendNetworkString(Connexn(i), #String + Str(i), #PB_UTF8)
    EndIf
  Next
  
  Delay(3000)
  
  Debug "Disconnect"
  For i = 1 To #ConSize
    If Connexn(i) And ConnectionID(Connexn(i))
      CloseNetworkConnection(Connexn(i))
    EndIf
  Next
  
EndProcedure


If InitNetwork()
  Cli()
Else
  MessageRequester("Error", "Can't initialize the network !", 0)
EndIf

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 1:20 pm
by infratec
Improved the code above.

Now it should work as it should.

But the Client is strange.

Because the disconnect is faster than the data can be processed.

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 2:34 pm
by infratec
Again small improvements.

Now I also updated the client, to see from which number I get the data.

Re: Get own threadID without passing as parameter

Posted: Sat May 02, 2020 5:56 pm
by mk-soft
Just to see how something can work.

Threads management: Mini Thread Control

Network for strings and data over64kb: Modul NetworkTCP

Network for big data and encryption (string, data, files, linked lists: Module NetworkData

Re: Get own threadID without passing as parameter

Posted: Sun May 03, 2020 12:58 am
by Olliv
That is good ! (Even if I have no network except my smartphone...)

Once upon a time a guy that I am, who discovers the term << Bank note >> !!!

@LiK137

I think #DataBuff should be a variable.

This allows it to adapt :

If UDP : DataBuff = Coins
If TCP : DataBuff = Bank notes


@mk-soft

Thank you for this very good recall
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