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627 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
23051e830a Changes in the API of 'luaH_set' and related functions 
Functions to set values in a table (luaH_set, luaH_newkey, etc.) receive
the new value, instead of returning a slot where to put the value.
 2020-12-04 11:08:42 -03:00
Roberto Ierusalimschy
65d2294454 Changed access to global table in the registry 
The global table is always in the array part of the registry; we can
use this fact to make its access slightly more efficient.
 2020-11-26 18:23:40 -03:00
Roberto Ierusalimschy
30528049f1 'lua_upvalueid' returns NULL on invalid upvalue index 2020-10-12 14:51:28 -03:00
Roberto Ierusalimschy
314c6057b7 Avoid any code before locks in the API 
For consistency in the C API, avoid any initializations before
callling lua_lock.
 2020-07-06 14:06:47 -03:00
Roberto Ierusalimschy
b57574d6fb Keep memory errors as memory errors 
Allow memory errors to be raised through the API (throwing the
error with the memory error message); error in external allocations
raises a memory error; memory errors in coroutines are re-raised
as memory errors.
 2020-07-06 12:09:44 -03:00
Roberto Ierusalimschy
ae809e9fd1 'luaV_concat' can "concat" one single value 
Several of its callers needed that case and had to do the check
themselves.
 2020-07-03 11:54:58 -03:00
Roberto Ierusalimschy
422ce50d2e Fixed detail in 'loadUpvalues' 
In 'lundump.c', when loading the upvalues of a function, there can be
a read error if the chunk is truncated. In that case, the creation
of the error message can trigger an emergency collection while the
prototype is still anchored. So, the prototype must be GC consistent
before loading the upvales, which implies that it the 'name' fields
must be filled with NULL before the reading.
 2020-06-30 15:36:26 -03:00
Roberto Ierusalimschy
46c3587a6f Clearer distinction between types and tags 
LUA_T* represents only types; tags (types + Variants) are represented
by LUA_V* constants.
 2020-01-31 11:09:53 -03:00
Roberto Ierusalimschy
5ff408d218 Changed internal representation of booleans 
Instead of an explicit value (field 'b'), true and false use different
tag variants. This avoids reading an extra field and results in more
direct code. (Most code that uses booleans needs to distinguish between
true and false anyway.)
 2020-01-06 11:38:31 -03:00
Roberto Ierusalimschy
e3c83835e7 Fixed bug in 'aux_rawset' 
In 'aux_rawset', top must be decremented after the barrier, which
refers to top-1. (Bug introduced in commit c646e57fd.)
 2019-12-30 14:53:38 -03:00
Roberto Ierusalimschy
c646e57fd6 Joined common code in 'lua_rawset' and 'lua_rawsetp' 2019-12-17 15:45:13 -03:00
Roberto Ierusalimschy
3747487320 Small correction in assertion 2019-12-13 14:02:42 -03:00
Roberto Ierusalimschy
508a705c1c Removed some wrong comments 
Both 'tonumber' and 'tointeger' cannot change the out parameter when
the conversion fails.
 2019-11-28 18:10:26 -03:00
Roberto Ierusalimschy
72a094bda7 Undo change in the handling of 'L->top' (commit b80077b8f3) 
With MMBIN instructions, there are fewer opcodes that need to update
'L->top', so that change does not seem to pay for the increased
complexity.
 2019-08-29 12:52:37 -03:00
Roberto Ierusalimschy
b80077b8f3 Change in the handling of 'L->top' when calling metamethods 
Instead of updating 'L->top' in every place that may call a
metamethod, the metamethod functions themselves (luaT_trybinTM and
luaT_callorderTM) correct the top. (When calling metamethods from
the C API, however, the callers must preserve 'L->top'.)
 2019-07-26 14:59:39 -03:00
Roberto Ierusalimschy
9c28ed05c9 Calls 'luaF_close' in 'lua_settop' only when needed 
In 'lua_settop', avoid calling 'luaF_close' when increasing the stack
or when the function has no to-be-closed variables.
 2019-07-17 15:22:11 -03:00
Roberto Ierusalimschy
298f383ffc Avoid setting the stack top below upvalues to be closed 
When leaving a scope, the new stack top should be set only after
closing any upvalue, to avoid manipulating values in an "invalid"
part of the stack.
 2019-07-16 14:13:22 -03:00
Roberto Ierusalimschy
d12262068d Small optimizations in range checks 
Checks of the form '1 <= x && x <= M' were rewritten in the form
'(unsigned)x - 1 < (unsigned)M', which is usually more efficient.
(Other similar checks have similar translations.) Although
some compilers do these optimizations, that does not happen
for all compilers or all cases.
 2019-03-27 14:56:10 -03:00
Roberto Ierusalimschy
b56d4e570a Changes in the warning system 
- The warning functions get an extra parameter that tells whether
message is to be continued (instead of using end-of-lines as a signal).

- The user data for the warning function is a regular value, instead
of a writable slot inside the Lua state.
 2019-03-14 15:30:54 -03:00
Roberto Ierusalimschy
cf71a5ddc7 Details 
Several small improvements (code style, warnings, comments, more tests),
in particular:

- 'lua_topointer' extended to handle strings
- raises an error in 'string.format("%10q")' ('%q' with modifiers)
- in the manual for 'string.format', the term "option" replaced by
  "conversion specifier" (the term used by the C standard)
 2019-03-13 13:16:53 -03:00
Roberto Ierusalimschy
2c32bff609 After a "bad collections", avoid switching back back to generational 
After a major bad collection (one that collects too few objects),
next collection will be major again. In that case, avoid switching
back to generational mode (as it will have to switch again to
incremental to do next major collection).
 2019-01-30 11:44:42 -02:00
Roberto Ierusalimschy
c6f7181e91 No more LUA_ERRGCMM errors 
Errors in finalizers (__gc metamethods) are never propagated.
Instead, they generate a warning.
 2019-01-01 12:14:56 -02:00
Roberto Ierusalimschy
437a5b07d4 Added a warning system to Lua 
The warning system is just a way for Lua to emit warnings, messages
to the programmer that do not interfere with the running program.
 2018-12-28 15:42:34 -02:00
Roberto Ierusalimschy
ba7da13ec5 Changes in the control of C-stack overflow 
* unification of the 'nny' and 'nCcalls' counters;
  * external C functions ('lua_CFunction') count more "slots" in
    the C stack (to allow for their possible use of buffers)
  * added a new test script specific for C-stack overflows. (Most
    of those tests were already present, but concentrating them
    in a single script easies the task of checking whether
    'LUAI_MAXCCALLS' is adequate in a system.)
 2018-12-27 14:32:29 -02:00
Roberto Ierusalimschy
6d04537ea6 A to-be-closed variable must have a closable value (or be nil) 
It is an error for a to-be-closed variable to have a non-closable
non-nil value when it is being closed. This situation does not seem to
be useful and often hints to an error. (Particularly in the C API, it is
easy to change a to-be-closed index by mistake.)
 2018-11-29 16:02:44 -02:00
Roberto Ierusalimschy
7696c6474f Auxiliary buffer cannot close box with 'lua_remove' 
To remove a to-be-closed variable from the stack in the C API a
function must use 'lua_settop' or 'lua_pop'. Previous implementation of
'luaL_pushresult' was not closing the box. (This commit also added
tests to check that box is being closed "as soon as possible".)
 2018-11-26 14:16:17 -02:00
Roberto Ierusalimschy
5fda30b4f9 'lua_toclose' gets the index to be closed as an argument 
Sometimes it is useful to mark to-be-closed an index that is not
at the top of the stack (e.g., if the value to be closed came from
a function call returning multiple values).
 2018-11-12 14:15:50 -02:00
Roberto Ierusalimschy
b8fed93215 New syntax for to-be-closed variables 
The new syntax is <local *toclose x = f()>. The mark '*' allows other
attributes to be added later without the need of new keywords; it
also allows better error messages.  The API function was also renamed
('lua_tobeclosed' -> 'lua_toclose').
 2018-11-07 10:03:05 -02:00
Roberto Ierusalimschy
34840301b5 To-be-closed variables in the C API 2018-10-25 15:30:15 -03:00
Roberto Ierusalimschy
9cbf17b0f1 Details (comments) 2018-09-11 08:39:12 -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
af70905246 no need to check whether libraries and host use the same kernel; 
Lua should work correctly with several copies of the kernel
 2018-06-18 09:08:10 -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
d406d3d05f removed unused macros 'isstackindex'/'api_checkstackindex' + 
macro 'api_checkvalidindex' (used only once) expanded and removed
 2018-06-15 14:30:52 -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
03c6a05ec8 no more nil-in-table 2018-04-04 11:23:41 -03:00
Roberto Ierusalimschy
fbea553ca2 'lua_setiuservalue' removes value from the stack even in case of error 2018-02-27 17:01:55 -03:00
Roberto Ierusalimschy
b7edf5d2d8 metamethods for 'removekey'/'keyin' 2018-02-27 14:48:28 -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
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
ca6fe7449a userdata can have multiple user values 2018-02-20 13:52:50 -03:00
Roberto Ierusalimschy
1afd5a152d more generic way to handle 'gclist' 2018-02-19 17:06:56 -03:00
Roberto Ierusalimschy
56e50e8bc5 'collectgarbage' returns old mode when changing mode 2018-02-05 15:10:52 -02:00
Roberto Ierusalimschy
dc0ab1e8ca warnings in VS (implicit casts from ptrdiff_t to int) 2018-01-29 14:21:35 -02:00
Roberto Ierusalimschy
e2b15aa21d janitor work on casts 2018-01-28 13:13:26 -02:00
Roberto Ierusalimschy
728ff94595 error handler in protected calls must be a function 2018-01-10 10:02:35 -02:00
Roberto Ierusalimschy
e663a24ab0 more freedom in handling memory-allocation errors (not all allocations 
automatically raise an error), which allows fixing a bug when resizing
a table.
 2017-12-08 15:28:25 -02:00
Roberto Ierusalimschy
ae11e37e53 bug: 'lua_pushcclosure' should not call the GC when 'n' is zero 2017-12-06 16:08:03 -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
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
ba36180fd7 new API for 'lua_resume' + cleaning the uses of the 'extra' field in 
'CallInfo'
 2017-11-02 09:28:56 -02:00
Roberto Ierusalimschy
b9e76be8a6 using 'L->func' when possible 2017-11-01 16:20:48 -02:00
Roberto Ierusalimschy
1d8920dd7f some cleaning in GC parameters 2017-10-11 09:38:45 -03:00
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
b029e7ea20 macro 'luaV_fastget' may need protection ({}) to be used inside 
'if's
 2017-06-01 17:22:33 -03:00
Roberto Ierusalimschy
72d82a296c revamping the incremental collector 
Some simplifications (not counting bytes, couting only slots visited;
no more 'gcfinnum'); more GC parameters; using vararg in 'lua_gc' to
set parameters in different GC modes
 2017-05-26 16:14:29 -03:00
Roberto Ierusalimschy
49f7aab62a 'lua_rawlen' returns 'lua_Unsigned' instead of 'size_t'. (Real 
length of strings and userdata are limited by Lua integers,
but table length is hard to compute limiting it to 'size_t'.)
 2017-05-18 09:34:58 -03:00
Roberto Ierusalimschy
7647d5d13d revamp of fast track for table access (table set uses the same 
macros as table get + new macro for integer keys)
 2017-05-11 15:57:46 -03:00
Roberto Ierusalimschy
69371c4b84 'KGC_NORMAL' -> 'KGC_INC' + emergency GC signalled by flag (instead 
of mode)
 2017-04-24 13:59:26 -03:00
Roberto Ierusalimschy
f748b4bb40 macros to define default parameters for generational collection 2017-04-20 15:22:44 -03:00
Roberto Ierusalimschy
c7bdc0e0e8 first version of control for the generational collector 2017-04-19 14:02:50 -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
2331e1beec small changes in 'luaC_upvalbarrier' 2017-04-06 10:08:56 -03:00
Roberto Ierusalimschy
f5f3df3bd1 generational collection: new attempt (still incomplete) 2017-02-23 18:07:34 -03:00
Roberto Ierusalimschy
03ca6385dc call 'checkGC' *after* creating new objects (this is how 'execute' 
does it)
(It increases the changes that 'allgc' start with a non-white
object, which helps 'entersweep')
 2016-02-29 11:27:14 -03:00
Roberto Ierusalimschy
1a44e82200 'luaV_fastget' only treats the real fast case (table with a non-nil 
value at given key, so that it does not need to check metamethods)
 2016-01-05 14:07:21 -02:00
Roberto Ierusalimschy
ff1289a361 in 'luaD_call', use two functions instead of one with fixed boolean 
argument
 2015-11-02 16:48:07 -02:00
Roberto Ierusalimschy
8949904783 allow NULL string when length is zero in 'lua_pushlstring' and 
'luaL_addlstring'
 2015-10-06 13:10:22 -03:00
Roberto Ierusalimschy
364cdbdbdb 'setobj2t' incorporated into 'luaV_fastset' + 'invalidateTMcache' 
is not needed in the fast track (as it does not create new
entries) + small bug in 'auxsetstr' (calling barrier with wrong
object) + using 'setobj2t' without side effects in its arguments
 2015-09-09 10:45:50 -03:00
Roberto Ierusalimschy
502214f8a5 added assert for NULL pointer in 'lua_pushlstring' 2015-08-25 15:50:37 -03:00
Roberto Ierusalimschy
8f25d08637 'invalidateTMcache' not needed in all 'settable' uses 2015-08-03 17:40:26 -03:00
Roberto Ierusalimschy
3b795541c4 fast track for 'settable' 2015-08-03 16:50:49 -03:00
Roberto Ierusalimschy
e247c3ada3 implementation of fast track for gettable operations 2015-07-20 15:24:50 -03:00
Roberto Ierusalimschy
dcad08b76d details (use original type when saving variable's value) 2015-06-18 11:19:52 -03:00
Roberto Ierusalimschy
67bf789462 avoid using API functions inside the core 2015-04-06 09:23:48 -03:00
Roberto Ierusalimschy
e723c75c02 details (avoid 'lint' warnings) 2015-03-28 16:14:47 -03:00
Roberto Ierusalimschy
a30c66f0fc macro 'luai_apicheck'/'api_check' back with a 'lua_State' parameter 
(some people use it)
 2015-03-06 16:49:50 -03:00
Roberto Ierusalimschy
2e6e53c7cc added API checks to some unprotected 'top' increments 2015-02-11 16:47:22 -02:00
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
fb6796ba06 removed useless initializations 2014-12-26 12:43:45 -02:00
Roberto Ierusalimschy
e5fd1e5fe2 details (match parameter names with lua.h and manual) 2014-11-12 11:28:54 -02:00
Roberto Ierusalimschy
28fdbcf393 added include for 'lprefix.h', for stuff that must be added before 
any other header file
 2014-11-02 17:19:04 -02:00
Roberto Ierusalimschy
c25072a246 'lua_load' sets _ENV for any chunk with upvalues (not just those 
with exactly one upvalue)
 2014-10-31 15:41:51 -02:00
Roberto Ierusalimschy
9de384e27a removed useless 'include math.h' 2014-10-28 15:27:50 -02:00
Roberto Ierusalimschy
bdf566a8a3 `name' in comments changed to 'name' 2014-10-25 09:50:46 -02:00
Roberto Ierusalimschy
0d31efb365 'lua_stringtonum' -> 'lua_stringtonumber' 2014-10-17 16:17:55 -03:00
Roberto Ierusalimschy
89602bf747 'lua_strtonum' -> 'lua_stringtonum' 2014-10-15 11:27:40 -03:00
Roberto Ierusalimschy
2a21f6c894 'lua_Kcontext' -> 'lua_KContext' 2014-10-07 15:29:13 -03:00
Roberto Ierusalimschy
9b25347a67 detail 2014-08-27 11:59:33 -03:00
Roberto Ierusalimschy
7f1a2ad699 new functions 'lua_geti/lua_seti' (non raw) 2014-08-21 17:07:56 -03:00
Roberto Ierusalimschy
2be88d5084 'lua_Ctx' -> 'lua_Kcontext' 2014-08-01 14:33:08 -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
97e299c395 'lua_replace' implemented as a macro using 'lua_copy' 2014-07-22 15:07:47 -03:00
Roberto Ierusalimschy
c697aa30bc more precise type for argument to 'aux_upvalue' 2014-07-21 13:02:57 -03:00
Roberto Ierusalimschy
e43612aaf6 put the restriction that 'luaC_barrierback' works only on tables 
in its prototype
 2014-07-19 12:09:37 -03:00
Roberto Ierusalimschy
bb12903120 type 'Udata' refers directly to structure inside the union (union 
used only for aligning purposes now)
 2014-07-18 11:46:47 -03:00
Roberto Ierusalimschy
56137d58ff added check for conversion 'obj2gco' (and corrections for small 
problems detected by this check)
 2014-07-18 09:17:54 -03:00