Opening and calling DLL functions from inside a Purebasic DLL [SOLVED]

[AndyMK]

I am having trouble calling dll functions from my purebasic dll. If i create a simple dll procedure and export as a dll then call it from another process, it works fine. If i try to load a dll inside my dll, for example portaudio and wrap a portaudio function, calling the wrapped function from another process, crashes the dll. Does anyone have any tips?

[STARGÅTE]

Without any code or snippets nor information at which point the main DLL or sub DLL crashes?

No!

[idle]

I am having trouble calling dll functions from my purebasic dll. If i create a simple dll procedure and export as a dll then call it from another process, it works fine. If i try to load a dll inside my dll, for example portaudio and wrap a portaudio function, calling the wrapped function from another process, crashes the dll. Does anyone have any tips?

Is it a case of structure alignment? have you tried with Align #PB_Structure_AlignC

[mk-soft]

Never done before.
But what is important is that no code is written outside of procedures. Otherwise, the DLL will crash.

According to PB help example

Code: Select all

CompilerIf #PB_Compiler_OS = #PB_OS_Windows

    ; These 4 procedures are Windows specific
    ;

    ; This procedure is called once, when the program loads the library
    ; for the first time. All init stuffs can be done here (but not DirectX init)
    ;
    ProcedureDLL AttachProcess(Instance)
    EndProcedure
  
  
    ; Called when the program release (free) the DLL
    ;
    ProcedureDLL DetachProcess(Instance)
    EndProcedure
  
  
    ; Both are called when a thread in a program call or release (free) the DLL
    ;
    ProcedureDLL AttachThread(Instance)
    EndProcedure
  
    ProcedureDLL DetachThread(Instance)
    EndProcedure

  CompilerEndIf

or

Code: Select all

Procedure InitMyDLL()
  ;TODO
EndProcedure : InitMyDLL()

[AndyMK]

I got it working. The dll i was calling had to be placed in the same directory as the calling process which is not Purebasic.
Godot -> calling pb dll -> calling another dll. <- this dll should be in the same dir as the Godot exe. It was in a separate folder with the pb source.

@mk-soft "But what is important is that no code is written outside of procedures"
What is classed as "code"?

[mk-soft]

@mk-soft "But what is important is that no code is written outside of procedures"
What is classed as "code"?

Everything Stack needs. Value allocations, string distribution, calculations, etc.

[skywalk]

Yes, just put all code in procedures.
If windows, there are attach and detach dll procedures you can run init codes. Or just make an init() proceduredll you call from your app.

[AndyMK]

I have IncludeFiles that contain variable allocations and macros at the top of my code and it seems to run fine. I put openlibrary stuff in a Procedure and globally allocated functions.