res_init()

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2 total messages Started by Stewart Brodie Thu, 30 Jul 1992 19:15

#91

Author: Stewart Brodie
Date: Thu, 30 Jul 1992 19:15

16 lines
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Small query about res_init().  

I have written a C program which uses the RISC OS library, and I want to
comply with the guidelines for software by using a different OS variable
to point to the R/W stuff from the Read Only stuff.  So I have set up:
Program$Dir and ProgramData$Dir.  

However, what I want to know is, is it safe to call res_init TWICE in
the same program, ie. after doing template_init() and resspr_init() with
the first variable, can I switch it?  It seems to work but is it safe,
or might some of the RISC OS library modules start to call the res
functions again during execution?

--
Stewart Brodie
snb90@uk.ac.soton.ecs

Re: res_init()

#95

Author: TMOTA
Date: Sat, 01 Aug 1992 01:25

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snb90@uk.ac.soton.ecs (Stewart Brodie) writes:

>However, what I want to know is, is it safe to call res_init TWICE in
>the same program, ie. after doing template_init() and resspr_init() with
>the first variable, can I switch it?  It seems to work but is it safe,
>or might some of the RISC OS library modules start to call the res
>functions again during execution?

I think that all res_init() does is to set the pathname of the resource
directory that RISC OS Lib stores and uses internally,though as Acorn
haven't supplied
  a) a decent manual, or
  b) any source code,
I can't be 100% certain...

In this case, it should be safe to call res_init() twice, but the first
directory will then be 'lost' (i.e it should be OK to load read-only
resources, then swap directories for subsequent use of r/w resources)

However, you can't really rely on this, as Acorn probably reserve the right
to completely bugger up any programs that make this assumption by changing
res_init() to crash or something if it's called twice... Not that they'd
do this to spite us, but just that in future releases of ROLib this assumption
may not hold true...

-- 
_________________  "I'd like to answer this question in two ways:
  /____ _ _/_ __       First in my normal voice, and then
 // / //_//_ /_/       in a silly, high-pitched whine." (Monty Python)

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