SETRBUF (3)
Switches the active receive buffer and saves the
previous buffer.
SYNOPSIS
B
C int oldbuf = pvm_setrbuf( int bufid )
Fortran call pvmfsetrbuf( bufid, oldbuf )
PARAMETERS
Integer specifying the message buffer identifier
for the new active receive buffer.
Integer returning the message buffer identifier
for the previous active receive buffer.
DESCRIPTION
The routine
pvm_setrbuf
switches the active receive buffer
to
bufid
and saves the previous active receive buffer
oldbuf.
If
bufid
is set to 0 then the present active receive buffer
is saved and no active receive buffer exists.
A successful receive automatically creates a new active receive buffer.
If a previous receive has not been unpacked and needs to be saved
for later, then the previous bufid can be saved and reset later
to the active buffer for unpacking.
The routine is required when managing multiple message buffers.
For example switching back and forth between two buffers.
One buffer could be used to send information to a graphical interface
while a second buffer could be used send data to other tasks
in the application.
EXAMPLES
C:
rbuf1 = pvm_setrbuf( rbuf2 );
Fortran:
CALL PVMFSETRBUF( NEWBUF, OLDBUF )
ERRORS
These error conditions can be returned by
pvm_setrbuf
switching to a non-existent message buffer.
SEE ALSO
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