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Conference bgsdev::phigs

Title:Digital PHIGS
Notice:V4.1 SSB kits -> 1000.88
Moderator:FREBRD::POEGEL
Created:Mon Feb 03 1986
Last Modified:Mon May 26 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1632
Total number of notes:6504

1631.0. "structure sharing in PHIGS for D-UNIX" by GYPOS3::EIBL (Reinhard Eibl @FKR, DTN 865-4027) Fri May 16 1997 08:33

Hello all,

have a customer porting his PHIGS based application from OpenVMS AXP to
Digital UNIX. Depending what the enduser does there are up to 8 PHIGS
workststions simultaneously open. To limit memory consumption it is
essential for the application that all workstations share the same CSS.

He found on OpenVMS that there are problems with structure sharing, depending
on wstype. We learnt that there are some undocumented logicals, which helped
to improve the behaviour, e.g. PHIGS$$ENABLE_STRUCT_SHARING

Can anybody tell or has experince, if PHIGS for Digital UNIX has similar
problems and if there are corresponding environment varables ?

Any help is appreciated. Thanks in advance.
/Reinhard
T.RTitleUserPersonal
Name
DateLines
1631.1Yes, undocumented logicals on OpenVMS have UNIX equivalentsBGSDEV::CROCKERBen Crocker, GKS proj. leader, 381-1909Fri May 16 1997 12:4617
Yes, the undocumented logicals in OpenVMS PHIGS have UNIX equivalents.
As all the undocumented logicals have a PHIGS$$ prefix (with two $-signs),
all the undocumented UNIX environmental controls have a PHIGS_ prefix.

So, for example,

PHIGS$$ENABLE_STRUCT_SHARING	= PHIGS_enable_struct_sharing

Your customer may also want to experiment with the regularly
documented environmental controls

PHIGS$DEVICE_STRUCT_SUPPORT_<wstype>	= PHIGSdevice_struct_support_<wstype>
and
PHIGS$DEVICE_STRUCT_ELMSIZE_<wstype>	= PHIGSdevice_struct_elmsize_<wstype>

	- Ben

1631.2thanksGYPOS3::EIBLReinhard Eibl @FKR, DTN 865-4027Thu May 22 1997 05:310