GETRBUF(3PVM) PVM Version 3.4 GETRBUF(3PVM)NAME
pvm_getrbuf - Returns the message buffer identifier for the active receive buffer.
SYNOPSIS
C int bufid = pvm_getrbuf( void )
Fortran call pvmfgetrbuf( bufid )
PARAMETERS
bufid Integer returning message buffer identifier for the active receive buffer.
DESCRIPTION
The routine pvm_getrbuf returns the message buffer identifier bufid for the active receive buffer or 0 if there is no current buffer.
EXAMPLES
C:
bufid = pvm_getrbuf();
Fortran:
CALL PVMFGETRBUF( BUFID )
ERRORS
No error conditions are returned by pvm_getrbuf
SEE ALSO pvm_getsbuf(3PVM)
30 August, 1993 GETRBUF(3PVM)
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SETRBUF(3PVM) PVM Version 3.4 SETRBUF(3PVM)NAME
pvm_setrbuf - Switches the active receive buffer and saves the previous buffer.
SYNOPSIS
C int oldbuf = pvm_setrbuf( int bufid )
Fortran call pvmfsetrbuf( bufid, oldbuf )
PARAMETERS
bufid Integer specifying the message buffer identifier for the new active receive buffer.
oldbuf 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
PvmBadParam
giving an invalid bufid.
PvmNoSuchBuf
switching to a non-existent message buffer.
SEE ALSO pvm_setsbuf(3PVM)
30 August, 1993 SETRBUF(3PVM)
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