I am trying to work with memory addresses back n forth..

Simple case of char* buffer that needs to be filled in by dll . Buffer does not change in Pharo after the call. Am I missing something here..

The memory address that is printed out does not match what I see in Pharo / infact the address does not change at all... for repeated call invoked from debugger.

C Code:

DLLEXPORT int readAndWritePipe(char* outBuf )
{
�� system("Echo readAndWritePipe" );
�� debugPrintf ( "readAndWritePipe: %d \n" , &outBuf , 1046 );
�� memcpy ( outBuf , "Testing123\0" , 11) ;
�� return 0;
}

void debugPrintf ( char* logString, int intArg , char* strArg, int size )
{ // can redirect as needed to logger end point..
�� FILE * logFile = fopen( "c:\\temp\\writePipes.log" , "a" );
�� char* buf = (char*) calloc( sizeof(char) , size );��
�� sprintf( buf, logString , intArg , strArg );
�� fputs(buf , logFile );
�� fclose(logFile);
}

Pharo:

testPharoBuffer: buf

�� <primitive: #primitiveNativeCall module: #NativeBoostPlugin error: errorCode >
�� ^ self nbCall:� #( int readAndWritePipe( String buf� ) ) module: 'TestPharo.dll'

testPharoBuffer
"self new testPharoBuffer "
�� | buf addr� addr2 |
�� buf := String new: 100000.
�� addr := buf asNBExternalString.
�� addr2 := ( NativeBoost allocate: 256 ).
�� self testPharoBuffer: addr . " or use addr2, both of it does not work"��
�� Transcript cr; show: buf.
��