Function PQrequestCancel

src/interfaces/libpq/fe-connect.c:4772–4799

* PQrequestCancel: old, not thread-safe function for requesting query cancel * * Returns true if able to send the cancel request, false if not. * * On failure, the error message is saved in conn->errorMessage; this means * that this can't be used when there might be other active operations on * the connection object. * * NOTE: error messages will be cut off at the current size of the * er

 * error message buffer, since we dare not try to expand conn->errorMessage!
 */
int
PQrequestCancel(PGconn *conn)
{
	int			r;

	/* Check we have an open connection */
	if (!conn)
		return false;

	if (conn->sock == PGINVALID_SOCKET)
	{
		strlcpy(conn->errorMessage.data,
				"PQrequestCancel() -- connection is not open\n",
				conn->errorMessage.maxlen);
		conn->errorMessage.len = strlen(conn->errorMessage.data);

		return false;
	}

	r = internal_cancel(&conn->raddr, conn->be_pid, conn->be_key,
						conn->errorMessage.data, conn->errorMessage.maxlen,
						false);

	if (!r)
		conn->errorMessage.len = strlen(conn->errorMessage.data);

	return r;
}


/*