Problem with tpcall and tpgetrply functions

Question

Hi,
I have a problem with tpcall() and tpgetrply() functions.
In this example (invoke tpcall()):
FBFR32 *buf;
FLDLEN32 buflen;
buf = a_buffer.getBuffer(); /* getBuffer() returns FBFR32* */
buflen = a_buffer.getLongitud();
/* at this point: buf == a_buffer.getBuffer() */
if (tpcall(a_contenedor.getServname(),
(char*)a_contenedor.getBufferPeticion()->getBuffer(),
a_contenedor.getBufferPeticion()->getLongitud(),
(char**)&buf,
(long*)&buflen,
0) == -1)
if (tperrno != TPESVCFAIL)
LANZAR_EXCEPCION(CADENA_WHAT_SB,
"Error en funcion Execute(), llamada tpcall()",
tpstrerror(tperrno))
/* at this point: buf != a_buffer.getBuffer() */
tpcall() function change the memory address of buf. What is the problem? Is wrong my code? Is a problem with tuxedo version?
My tuxedo version is:
tmadmin -vINFO: BEA Tuxedo, Version 8.0, 32-bit, Patch Level 306
INFO: Serial #: 650522264137-773290431251, Expiration NONE, Maxusers 150
INFO: Licensed to: Telefonica Moviles Espa?a, S.A.
INFO: 56-bit Encryption Package
Thanks,
ANTONIO.

Answer 1

There's nothing wrong with your code or tuxedo. tpcall (and tpgetrply) can change the address of the return buffer if it needs to allocate more memory to hold the data. This is the reason why you pass a pointer to the buffer as the output buffer parameter to tpcall and tpreturn. Everything is working as expected.