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310 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
e8c779736f Removed internal cache for closures 
The mechanism of "caching the last closure created for a prototype to
try to reuse it the next time a closure for that prototype is created"
was removed. There are several reasons:

- It is hard to find a natural example where this cache has a measurable
impact on performance.

- Programmers already perceive closure creation as something slow,
so they tend to avoid it inside hot paths. (Any case where the cache
could reuse a closure can be rewritten predefining the closure in some
variable and using that variable.)

- The implementation was somewhat complex, due to a bad interaction
with the generational collector. (Typically, new closures are new,
while prototypes are old. So, the cache breaks the invariant that
old objects should not point to new ones.)
 2018-11-01 13:21:00 -03:00
Roberto Ierusalimschy
4cd1f4aac0 Towards "to closed" local variables 
Start of the implementation of "scoped variables" or "to be closed"
variables, local variables whose '__close' (or themselves) are called
when they go out of scope. This commit implements the syntax, the
opcode, and the creation of the corresponding upvalue, but it still
does not call the finalizations when the variable goes out of scope
(the most important part).

Currently, the syntax is 'local scoped name = exp', but that will
probably change.
 2018-10-08 10:42:07 -03:00
Roberto Ierusalimschy
f99509581e Removed extra information from RCS keyword strings 
Version numbers and dates (mostly wrong) from RCS keyword strings
removed from all source files; only the file name are kept.
 2018-08-23 14:26:12 -03:00
Roberto Ierusalimschy
b95e466218 new field 'nilvalue' in struct 'global_State' to avoid the use of 
addresses of static variables
 2018-06-15 16:31:22 -03:00
Roberto Ierusalimschy
6e600695f8 field 'sizearray' in struct 'Table' changed to 'alimit', which can 
be used as a hint for '#t'
 2018-06-15 11:14:20 -03:00
Roberto Ierusalimschy
505fc91222 no more 'luaO_nilobject' to avoid comparison of global variable addresses 
(now uses static variables)
 2018-06-01 14:40:38 -03:00
Roberto Ierusalimschy
fb8fa66136 no more 'luaH_emptyobject' and comparisons of addresses of global variables 
(instead, use a different kind of nil to signal the fake entry returned
when a key is not found in a table)
 2018-06-01 13:51:34 -03:00
Roberto Ierusalimschy
03c6a05ec8 no more nil-in-table 2018-04-04 11:23:41 -03:00
Roberto Ierusalimschy
ef8263f81f better names for macros for tags and types. 
rttype -> rawtt; ttyperaw -> withvariant; ttype -> ttypetag;
tnov -> ttype
 2018-02-26 11:16:05 -03:00
Roberto Ierusalimschy
2952bc5fc9 special compact representation for userdata with no user values 
(a common case)
 2018-02-26 10:35:03 -03:00
Roberto Ierusalimschy
75efc6722b avoid variant tags with the same value of the original type 
(to expose bugs more easily)
 2018-02-25 09:52:32 -03:00
Roberto Ierusalimschy
d766e2ae17 first (parcial) implementation of 'keyin'/'removekey' 
(still no metamethods, no raw verssions)
 2018-02-25 09:48:16 -03:00
Roberto Ierusalimschy
9243c414d9 first version of empty entries in tables 
(so that, in the future, tables can contain regular nil entries)
 2018-02-23 10:16:18 -03:00
Roberto Ierusalimschy
477ca2fe8c some reorganization in 'lobject.h' 
(just moving stuff around)
 2018-02-22 14:28:10 -03:00
Roberto Ierusalimschy
c80c7a49fd details (comments) 2018-02-21 13:28:12 -03:00
Roberto Ierusalimschy
ca6fe7449a userdata can have multiple user values 2018-02-20 13:52:50 -03:00
Roberto Ierusalimschy
e2b15aa21d janitor work on casts 2018-01-28 13:13:26 -02:00
Roberto Ierusalimschy
6710a2b0ef detail (comment) 2018-01-28 10:07:53 -02:00
Roberto Ierusalimschy
599f1742c6 detail (typo in comments) 2017-11-23 17:29:04 -02:00
Roberto Ierusalimschy
ad0704e40c back to 'CallInfo' (no gains with its removal) 2017-11-07 11:25:26 -02:00
Roberto Ierusalimschy
5a3f26f855 fitting a StackValue structure into 32 bytes (for 64-bit machines) 2017-11-06 15:34:06 -02:00
Roberto Ierusalimschy
472c560705 no more useful fields in CallInfo 2017-11-03 15:22:54 -02:00
Roberto Ierusalimschy
54eb35a8aa more fields moved out of 'CallInfo' 2017-11-03 10:12:30 -02:00
Roberto Ierusalimschy
c5482468fd baby steps to remove 'CallInfo': keeping 'L->func' correct 2017-10-31 15:54:35 -02:00
Roberto Ierusalimschy
f96497397a new type 'StackValue' for stack elements 
(we may want to put extra info there in the future)
 2017-06-29 12:06:44 -03:00
Roberto Ierusalimschy
b42430fd3a 'lineinfo' in prototypes saved as differences instead of absolute 
values, so that the array can use bytes instead of ints, reducing
its size. (A new array 'abslineinfo' is used when line differences
do not fit in a byte.)
 2017-06-27 08:35:31 -03:00
Roberto Ierusalimschy
73ec04fcf3 no more 'DEADKEY'. Table traversals do not need to consider dead keys; 
if the key is dead, it cannot be given to 'next'. Instead, we now
use a 'table' tag without the collectable bit, which makes it
a unique tag good enough to reserve space.
 2017-06-12 11:21:44 -03:00
Roberto Ierusalimschy
b6f87491af in hash nodes, keys are stored in separate pieces to avoid wasting 
space with alignments
 2017-06-09 13:48:44 -03:00
Roberto Ierusalimschy
4bb30f461b when assigning to a 'TValue', better assign only exact fields, 
to allow us to put stuff after the 'TValuefields' if needed
 2017-06-01 17:24:05 -03:00
Roberto Ierusalimschy
8634b2a011 added 'cachemiss' field to prototype to avoid wasting time checking 
hits that fail too often
 2017-04-30 17:43:26 -03:00
Roberto Ierusalimschy
2caecf1b3e type 'L_Umaxalign' replaced by macro 'LUAI_MAXALIGN', which is also added 
to the auxlib buffer
 2017-04-24 15:06:12 -03:00
Roberto Ierusalimschy
a3d36fe283 Upvalues collected like everything else (with mark-sweep) instead 
of reference count (simpler and better for generational mode)
 2017-04-11 15:41:09 -03:00
Roberto Ierusalimschy
e4a9e6fcca do not eliminate varargs from functions that do not use varargs 
(confuses the debug lib and gains very little in performance)
 2016-08-01 16:51:24 -03:00
Roberto Ierusalimschy
ebb2afa54b allow 'set' macros to be used when 'L' is not available (as it was 
needed only for assertions)
 2015-11-03 16:33:10 -02:00
Roberto Ierusalimschy
6707ce6349 function prepares vararg only if it really uses them (chunks 
are always declared vararg but seldom uses them)
 2015-10-28 15:28:40 -02:00
Roberto Ierusalimschy
ee5edb6b68 macros 'getaddrstr' and 'getstr' unified (they do the same thing) 2015-09-17 12:51:05 -03:00
Roberto Ierusalimschy
eb0be12ceb detail in macro 'checkliveness' + macro 'setobj2t' defined as an 
expression (to be used in macro 'luaV_fastset')
 2015-09-08 13:54:52 -03:00
Roberto Ierusalimschy
6556fcfe5a small janitor work 2015-09-08 12:49:25 -03:00
Roberto Ierusalimschy
2ecaf18138 using macros ('rttype' and 'settt_') to access "private" field 'tt_' 2015-06-09 11:21:42 -03:00
Roberto Ierusalimschy
6ffe006f5c detail (removed unused macro VARBITS) 2015-04-02 18:10:53 -03:00
Roberto Ierusalimschy
2b37f2150e comments 2015-03-14 14:58:57 -03:00
Roberto Ierusalimschy
6408bc0b7f new macros 'chgfltvalue'/'chgivalue' (numerical for loop does 
not need to set the type of its internal variable at each iteration)
 2015-03-02 13:04:52 -03:00
Roberto Ierusalimschy
7e2015a46d size of short strings stored in a single byte, to reduce the size 
of struct 'TString'
 2015-01-16 14:54:37 -02:00
Roberto Ierusalimschy
3c55790ebe 'setkey' -> 'setnodekey' (to avoid conflicts with POSIX) 2015-01-05 11:52:37 -02:00
Roberto Ierusalimschy
2b83711fba new macro 'nvalue' (to convert an object to a float when we know 
object is a number)
 2014-12-19 11:36:32 -02:00
Roberto Ierusalimschy
bdf566a8a3 `name' in comments changed to 'name' 2014-10-25 09:50:46 -02:00
Roberto Ierusalimschy
34b6664dcb better to use 'long' to represent UTF-8 code points 2014-10-01 08:52:33 -03:00
Roberto Ierusalimschy
3a15c7ce43 size for array part of a table ('sizearray') changed from 'int' to 
'unsigned int', which allows twice as many elements in the array part
 2014-09-04 15:15:29 -03:00
Roberto Ierusalimschy
34ac039fb8 new macro 'cvt2str' to better control whether numbers are convertible 
to strings
 2014-07-30 11:00:14 -03:00
Roberto Ierusalimschy
07c7fdb9df simpler definition for 'setobj' (trust the compiler for the assignment) 2014-07-29 13:22:24 -03:00