12-10-2001
Thanks a lot for all the help.
I got all the info I needed. Willtrouble again if I get stuck !
![Smilie Smilie](https://www.unix.com/images/smilies/smile.gif)
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LEARN ABOUT REDHAT
pvmffreebuf
FREEBUF(3PVM) PVM Version 3.4 FREEBUF(3PVM)
NAME
pvm_freebuf - Disposes of a message buffer.
SYNOPSIS
C int info = pvm_freebuf( int bufid )
Fortran call pvmffreebuf( bufid, info )
PARAMETERS
bufid Integer message buffer identifier.
info Integer status code returned by the routine. Values less than zero indicate an error.
DESCRIPTION
The routine pvm_freebuf frees the memory associated with the message buffer identified by bufid. Message buffers are created by pvm_mkbuf,
pvm_initsend, and pvm_recv. If pvm_freebuf is successful, info will be 0. If some error occurs then info will be < 0.
pvm_freebuf can be called for a send buffer created by pvm_mkbuf after the message has been sent and is no longer needed.
Receive buffers typically do not have to be freed unless they have been saved in the course of using multiple buffers. But pvm_freebuf can
be used to destroy receive buffers as well. So messages that arrive but are no longer needed can be destroyed so they will not consume
buffer space.
Typically multiple send and receive buffers are not needed and the user can simply use the pvm_initsend routine to reset the default send
buffer.
There are several cases where multiple buffers are useful. One example where multiple message buffers are needed involves libraries or
graphical interfaces that use PVM and interact with a running PVM application but do not want to interfere with the application's own com-
munication.
When multiple buffers are used they generally are made and freed for each message that is packed. In fact, pvm_initsend simply does a
pvm_freebuf followed by a pvm_mkbuf for the default buffer.
EXAMPLES
C:
bufid = pvm_mkbuf( PvmDataDefault );
:
info = pvm_freebuf( bufid );
Fortran:
CALL PVMFMKBUF( PVMDEFAULT, BUFID )
:
CALL PVMFFREEBUF( BUFID, INFO )
ERRORS
These error conditions can be returned by pvm_freebuf
PvmBadParam
giving an invalid argument value.
PvmNoSuchBuf
giving an invalid bufid value.
SEE ALSO
pvm_mkbuf(3PVM), pvm_initsend(3PVM), pvm_recv(3PVM)
30 August, 1993 FREEBUF(3PVM)