This commit adds the new method `GC.compact` and compacting GC support.
Please see this issue for caveats:
https://bugs.ruby-lang.org/issues/15626
[Feature #15626]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c (RHASH_AR_TABLE_SIZE_DEC): generally, we need to check all
entries to calculate exact "bound" in ar_table, but if size == 0,
we can clear bound because there are no active entries.
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* hash.c: ar_table only supports `objhash` so we can call compare/hash
functions directly.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66718 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c (hash_stlike_lookup): introduce inline a function and use it
instead of using ar_lookup()/st_lookup() directly.
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* hash.c: the type of `ar_table_entry::hash` is not a `VALUE`,
but a `st_hash_t`.
Also `st_hash_t` is not a `st_data_t`, but `st_index_t` (same as st.c).
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* internal.h: move ar_table def to hash.c because other files
don't need to know implementation of ar_table.
* hash.c (rb_hash_ar_table_size): added because gc.c needs to know
the size_of(ar_table).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66638 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c: separate NULL and EMPTY check functions.
`RHASH_TABLE_EMPTY` function checks NULL table or not,
but it should be named "NULL_P".
Introduce `RHASH_TABLE_EMPTY_P` function to check size == 0.
There are cases that hash has table data even if data is not NULL
(in case removed after inserted elements).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66392 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* internal.h: rename the following names:
* li_table -> ar_table. "li" means linear (from linear search),
but we use the word "array" (from data layout).
* RHASH_ARRAY -> RHASH_AR_TABLE. AR_TABLE is more clear.
* rb_hash_array_* -> rb_hash_ar_table_*.
* RHASH_TABLE_P() -> RHASH_ST_TABLE_P(). more clear.
* RHASH_CLEAR() -> RHASH_ST_CLEAR().
* hash.c: rename "linear_" prefix functions to "ar_" prefix.
* hash.c (linear_init_table): rename to ar_alloc_table.
* debug_counter.h: rename obj_hash_array to obj_hash_ar.
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* hash.c (linear_update): initialize `bin` just to silence false
warnings by old gcc 4.8. [Bug #15299]
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The reserved hash values in hash.c must be consistend with st.c.
[ruby-core:90356] [Bug #15389]
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* include/ruby/ruby.h: de-transient at
`RARRAY_PTR_USE` and `RARRAY_PTR_USE_START`.
Introduce `RARRAY_PTR_USE_TRANSIENT` and
`RARRAY_PTR_USE_START_TRANSIENT` if you don't want to
de-transient an array. Generally, it is difficult
so C-extension writers should not use them.
* array.c: use `RARRAY_PTR_USE_TRANSIENT` if possible.
* hash.c: ditto.
* enum.c (enum_sort_by): remove `rb_ary_transient_heap_evacuate()`
because `RARRAY_PTR_USE` do de-transient.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66165 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c (linear_copy): solve two issues on `Hash#replace`.
(1) fix memory leak
(1-1) don't allocate memory if destination already
has a memory area.
(1-2) free destination memory if src is NULL.
(2) clear transient heap flag if src is NULL. [Bug #15358]
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When a negative double is casted into an unsigned type, that operation
is undefined (cf: ISO/IEC 9899:1990 section 6.2.9.3). Recent versions
of C kindly footnotes that "The remaindering operation performed when
a value of integer type is converted to unsigned type need not be
performed when a value of real floating type is converted to unsigned
type" (cf: ISO/IEC 9899:1999 section 6.3.1.4 footnote 50).
So it is a wrong idea to just cast a double to st_data_t.
The intention of the code is commented as "mix the actual float value
in". It seems we should do a reinterpret_cast and rule out
static_cast.
Confirmed this changeset does not affect `make benchmark`.
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Before this changeset RHASH_ARRAY_SIZE_DEC() was expaneded to include
an expression like `RHASH_ARRAY_SIZE+(-1)`. RHASH_ARRAY_SIZE is by
definition unsigned int. -1 is signed, of course. Adding a signed
and an unsigned value requires the "usual arithmetic conversions" (cf:
ISO/IEC 9899:1990 section 6.2.1.5). -1 is converted to 0xFFFF by that.
This patch prevents that conversion.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65632 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c (RHASH_ARRAY_BOUND_RAW): should be unsigned as well as
RHASH_ARRAY_SIZE_RAW.
* hash.c (find_entry): return unsigned for the consistency with
RHASH_ARRAY_SIZE and RHASH_ARRAY_BOUND.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65513 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c (linear_copy): remember a hash object to mark pointing objects.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c: remove '//' style comments pointed out by the following
build log: 448551951
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* hash.c, internal.h: support theap for small Hash.
Introduce RHASH_ARRAY (li_table) besides st_table and small Hash
(<=8 entries) are managed by an array data structure.
This array data can be managed by theap.
If st_table is needed, then converting array data to st_table data.
For st_table using code, we prepare "stlike" APIs which accepts hash value
and are very similar to st_ APIs.
This work is based on the GSoC achievement
by tacinight <tacingiht@gmail.com> and refined by ko1.
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We revisit [Bug #9188] since st.c is much improved since then,
and benchmarks against so_k_nucleotide seem to indicate little
or no performance change compared to before.
[ruby-core:89555] [Feature #15251]
From: Anmol Chopra <chopraanmol1@gmail.com>
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65371 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c: [DOC] improve docs for Hash#{merge,merge!,update}:
various rewordings, avoid referring to the receiver as `hsh'
(does not appear in the call-seq of the generated HTML docs),
mention that Hash#update is an alias for Hash#merge!,
use more distinct example values, fix spacing in code.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65069 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c: [DOC] shorten example code for Hash#{size,length}
and mention aliases at the end; also enable links.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65036 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* hash.c (env_enc_str_new): as no locale/filesystem encoding is
available in miniruby on Windows, fallback the encoding to
ASCII-8BIT so it is valid encoding when the conversion failed.
[ruby-core:89177] [Bug #15164]
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