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Conference azur::mcc

Title:	DECmcc user notes file. Does not replace IPMT.
Notice:	Use IPMT for problems. Newsletter location in note 6187
Moderator:	TAEC::BEROUD

Created:	Mon Aug 21 1989
Last Modified:	Wed Jun 04 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	6497
Total number of notes:	27359

216.0. "mcc_desframe_create_descriptor" by COOKIE::KITTELL (Richard - Architected Info Mgmt) Mon Jul 30 1990 20:17

What does mcc_desframe_create_descriptor do when the "desc" argument,
the location it will write the address of the descriptor to, is non-null?

I've learned from experience that the descriptor "handle" must be
either null or a valid address to something. If it is an address, must
it point at a descriptor, and if so does it re-use that descriptor
instead of allocating a new one?

Thanks.

T.R	Title	User	Personal Name	Date	Lines
216.1	Details on mcc_desframe_create_descriptor	MKNME::BLACK		`Tue Jul 31 1990 09:06`	9
	The "desc" argument may point to NULL (in which case a descriptor is allocated using the mcc_desframe_alloc routine) or if it is not NULL it must point to a valid descriptor. The valid descriptor is reused; the buffer within the descriptor is reallocated if it is too small.
216.2	mcc_a_link not cleared	COOKIE::KITTELL	Richard - Architected Info Mgmt	`Wed Jan 09 1991 17:23`	7
	When the "desc" argument points to a valid descriptor whose mcc_a_link is non-null, the link field retains it's old value instead of being set to null. Depending on whether it is a bug or a feature, it should be QAR'd or documented.
216.3	qar #362 MCC_INTERNAL dbase	GOSTE::CALLANDER		`Thu Jan 10 1991 12:00`	4
	I have entered a qar, #362, in the MCC_INTERNAL qar database for you.