SETMWID(3PVM) manual page

Table of Contents

NAME

pvm_getmwid, pvm_setmwid - Get or set wait ID of a message.

SYNOPSIS

C int info = pvm_getmwid( int bufid )
int info = pvm_setmwid( int bufid, int waitid )

Fortran Not Available

PARAMETERS

bufid: Message buffer identifier.
waitid: Wait identifier number.

DISCUSSION

A wait identifier is part of a message (like the source, destination, tag and body). It is used to match a reply to the corresponding request.

The default wait ID for a message is zero (none).

pvm_getmwid returns the wait ID associated with a message buffer, or a negative error code.

pvm_setmwid assigns a new wait ID to a message buffer. It returns PvmOk unless an error occurs.

EXAMPLES

int src, tag;

pvm_recv(-1, -1);
/* ... process, compose reply message */
pvm_setmwid(pvm_getsbuf(), pvm_getmwid(pvm_getrbuf()));
pvm_bufinfo(pvm_getrbuf(), (int *)0, &tag, &src);
pvm_send(src, tag);

ERRORS

The following error conditions can be returned by pvm_getmwid or pvm_setmwid:

PvmBadParam invalid value for bufid argument.
PvmNoSuchBuf message buffer bufid doesn't exist.