While hash tables are useful for large symbol tables, the bool "enum" is
too small to justify one and even bsearch is too expensive (also,
bsearch requires knowing the number of elements, which is a bit of a
hassle currently).
The string type is useful for passing around strings (the only thing
that they can do, currently), particularly as arguments to functions.
The voidptr type is (currently) never generated by the core cexpr
system, but is useful for storing pointers via cexpr (probably a bit of
a hack, but it seems to work well in my current use).
I never liked it, but with C2x coming out, it's best to handle bools
properly. I haven't gone through all the uses of int as bool (I'll leave
that for fixing when I encounter them), but this gets QF working with
both c2x (really, gnu2x because of raw strings).
I don't know what I was thinking when I checked for 0 count for resizing
the set. Attempting to add/remove 0 elements results in adding/removing
4G elements. Oops.
set_while checks the iterator's current element membership and skips to
the first element with different membership. ie, if the current element
is in the set, then set_while returns the next element *not* in the set,
but if the current is not in the set, then set_while returns the next
element that *is* in the set. Rather handy for dealing with clusters of
set elements.
Requiring top-level {} or () for (usually) hand-written files is awkward
and even a little error prone, and certainly ugly at times. With this,
loaders that expect a particular format can specify the format a little
more directly.
I had looked into doing reference counting on the strings, but didn't
like the implementation. However, it did make for better string handling
in the property list parser.
And rename _bsearch to QF_bsearch_r since that's far less confusing.
Also, update the test to make it possible for valgrind to detect the
out-by-one. The problem was found when trying to remove components from
an entity when using subpools.
I'm not 100% sure this is the best fix for the issue, but the way the
cbuf interpreter stack works (especially in the console code) meant that
the stack was built in the order opposite to how it could be safely
deleted with the existing function. Yeah, more leaks :P
Uncovered by the memory leak cleanup: the nodes were all being "linked"
to the first node, those nodes in between the first and last were
getting lost.
This was mainly for the shutdown functions, thus allowing Sys_Shutdown
(and Sys_RegisterShutdown) to be per-thread, but it seemed like a good
idea to make everything per-thread.
Finally, hash links can be freed when the hash context is no longer
relevant. The context is created automatically when needed, and the
owner can delete the context when its done with the relevant hash
tables.
While the cexpr parser itself doesn't support void functions, they have
their uses when used with the system, and mixing them into the list of
function overloads shouldn't break non-void functions.
At least with a push-parser, by the time the parser has figured out it
has an identifier, the lexer has forgotten the token, thus the annoying
and uninformative "undefined identifier " error messages. Since
identifiers should always have a value (and functions need a function
type), setting up a dummy symbol with just the identifier name
duplicated seems to do the trick. It is a bit wasteful of memory if
there are a lot of such errors between cmem resets, though.
I ran into the need to get at the label of labeled array element and the
best way seemed to be by setting the name field of the plfield_t item
passed to the parser function, and then found that PL_ParseSymtab
already does this. I then decided passing the array index would also be
good, and the offset field made sense.
If the result object type pointer is null, then the parsed result type
and value pointers are written directly to the result object rather than
testing the parsed result type against the object type and copying the
parsed result value data to the location of the object value. It is then
up to the caller to check the type and copy the value data.
This fixes maplist showing only those maps in the user directory.
However, no checking is done for duplicate files due to earlier search
paths overriding later paths.
While chatting about utf-8, I noticed that QF doesn't ensure the input
sequences are the shortest possible encodings. It turns out that the
check is easy in that only the second byte needs to be checked if the
first byte's data bits are 0, and the second byte must have a data value
larger than that representable by the next lower leading byte.
I must have forgotten about the SYS_DeveloperID_... enum values, when I
wrote that code, because relying on the line number is not really for
the best.
Just head and tail are atomic, but it seems to work nicely (at least on
intel). I actually had more trouble with gcc (due to accidentally
testing lock-free with the wrong ring buffer... oops, but yup, gcc will
happily optimize your loop to spin really really fast). Also served as a
nice test for C11 threading.
Because the calculation didn't take the hunk header size (which is not
included in the hunk size) into account, the conversion to MB was one
short and thus the rounding up to the next 8 MB boundary was giving the
current total hunk size (ie, the already given size). Most confusing to
a user ("But I already asked for 128MB!").
It turns out that copying just "unknown" is a significant performance
hit when doing over 100M allocations. Making Hunk_RawAlloc the core and
initializing the name field with a single 0 shaved about a second off
`qfvis gmsp3v2.bsp` (from about 39s to about 38s).
My reason for using Hunk_HighAlloc for allocating cache blocks was to
lock them down so they were safe for the sound mixer to access when
running in a real-time thread. However, I had never tested under tight
memory constraints, which proved that the design (or maybe just
implementation) just wasn't robust. However, now that sounds are loaded
into a completely separate region, it's safe to put the cache back to
its original behaviour (still with 64-byte alignment and such, of
course). This will even allow the high hunk to be used again, though it
effectively was anyway with Hunk_TempAlloc.
