This change introduces the symbol
ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
to guard redundant declarations of static constexpr data
members that are needed prior to C++17.
This change also introduces the symbol
ABSL_INTERNAL_CPLUSPLUS_LANG, which is supposed to be set
to the same value as __cplusplus, except it uses _MSVC_LANG
on MSVC so that the value is correct on MSVC.
Neither of these new symbols should be used outside of Abseil.
Fixes#1191
PiperOrigin-RevId: 453923908
Change-Id: I1316c52c19fa0c168b93cced0c817e4cb7c9c862
Avoid using value move/swap and delete those functions from slot_policy types. There was only one use of params_type::move in `erase`.
PiperOrigin-RevId: 453237739
Change-Id: Ie81c6dba6c4db34e97a067d2c0defcded8044a5a
https://pastebin.com/CmnzwUFN
The key idea is to avoid using 16 byte NEON and use 8 byte NEON which has lower latency for BitMask::Match. Even though 16 byte NEON achieves higher throughput, in SwissMap it's very important to catch these Matches with low latency as probing on average happens at most once.
I also introduced NonIterableMask as ARM has really great cbnz instructions and additional AND on scalar mask had 1 extra latency cycle
PiperOrigin-RevId: 453216147
Change-Id: I842c50d323954f8383ae156491232ced55aacb78
We were using `init_type`s for temp values that we would move into slots, but in this case, we need to have actual slots. We use node handles for managing slots outside of nodes.
Also, in btree::copy_or_move_values_in_order, pass the slots from the iterators rather than references to values. This allows for moving from map keys instead of copying for standard layout types.
In the test, fix a couple of ClangTidy warnings from missing includes and calling `new` instead of `make_unique`.
PiperOrigin-RevId: 452062967
Change-Id: I870e89ae1aa5b3cfa62ae6e75b73ffc3d52e731c
Benchmarks: https://pastebin.com/tZ7dr67W. Works well especially on smaller ranges.
After a week on spending optimizing NEON SIMD where I almost managed to make hash tables work with NEON SIMD without performance hits (still 1 cycle to optimize and I gave up a little), I found an interesting optimization for aarch64 to use cls instruction (count leading sign bits).
The loop has a property that ctrl_ group is not matched against count when the first slot is empty or deleted.
```
void skip_empty_or_deleted() {
while (IsEmptyOrDeleted(*ctrl_)) {
uint32_t shift = Group{ctrl_}.CountLeadingEmptyOrDeleted();
ctrl_ += shift;
slot_ += shift;
}
...
}
```
However, `kEmpty` and `kDeleted` have format of `1xxxxxx0` and `~ctrl & (ctrl >> 7)` always sets the lowest bit to 1.
In naive implementation, it does +1 to start counting zero bits, however, in aarch64 we may start counting one bits immediately. This saves 1 cycle and 5% of iteration performance.
Then it becomes hard to find a supported and sustainable C++ version of it.
`__clsll` is not supported by GCC and was supported only since clang 8, `__builtin_clrsb` is not producing optimal codegen for clang. `__rbit` is not supported by GCC and there is no intrinsic to do that, however, in clang we have `__builtin_bitreverse{32,64}`. For now I decided to enable this only for clang, only if they have appropriate builtins.
PiperOrigin-RevId: 451168570
Change-Id: I7e9256a60aecdc88ced4e6eb15ebc257281b6664
Add a new (internal) feature test macro to detect whether the wrappers are no-ops on a given platform.
Note that one-arg __builtin_prefetch(x) is equivalent to __builtin_prefetch(x, 0, 3), per `man BUILTIN_PREFETCH(3)` and gcc docs.
PiperOrigin-RevId: 449508660
Change-Id: I144e750205eec0c956d8dd62bc72e10bdb87c4f7
The old analysis viewed it as birthday attack, which asks how often
there are multiple values in the probe same probe sequence with the
same H2. In their own words, this analysis "breaks down" at around `n
= 12`.
Instead we can answer a simpler question, which is, if a probe
sequence examines `k` objects that are not what we are looking for,
what's the number of calls `==`? The expectation is simply `k/128`.
PiperOrigin-RevId: 446518063
Change-Id: Ie879bd4f6c97979822bc9d550b9e2503b1418c78
--
3d018c03a34bf273a4b24b3584ed77f0a6d21686 by Abseil Team <absl-team@google.com>:
Fix a spelling typo (s/boundries/boundaries).
PiperOrigin-RevId: 442041877
Change-Id: I608020697d37b85316bb9a0838e4b457659c926c
--
518b8119e51db24ce7fb0fd2fe537ec43825c3e6 by Dino Radakovic <dinor@google.com>:
absl/types/internal/variant: Make include guard uppercase
https://google.github.io/styleguide/cppguide.html#The__define_Guard
PiperOrigin-RevId: 441911692
Change-Id: I9837dd07f20204d8253f20627b0917a34dc21825
--
b91696c38310a7cae8c1ea9e2d479495f5dc3f69 by Greg Falcon <gfalcon@google.com>:
Add an internal-only API to wrap __builtin_prefetch() if available.
This private API is intended for future use by the Abseil implementation. Like any internal-namespaced function, it may be changed or removed at any time.
PiperOrigin-RevId: 441894616
Change-Id: Iaa48bd4680b373f4a0d5afab0cb35e2a1908595f
--
0f01e8b0551a662e02dff60840c54320f987315f by Derek Mauro <dmauro@google.com>:
C++20: Use the standard `constinit` keyword for `ABSL_CONST_INIT` when available
PiperOrigin-RevId: 441778874
Change-Id: I70c616469752ff23b326b1c615437599f42cc6aa
GitOrigin-RevId: 3d018c03a34bf273a4b24b3584ed77f0a6d21686
--
fb671efb2a70f452f17a884b17cf18817b977a8f by Abseil Team <absl-team@google.com>:
Remove extra semicolon in ABSL_INTERNAL_ASSERT_IS_FULL macro
To fix compilation when empty statement warning is treated as error.
PiperOrigin-RevId: 438342663
Change-Id: I3067fbeffa2691888f37554e88f229f24fb55ecc
--
a58c9396f1d88d11347aed36ef2e1b633071363c by Martijn Vels <mvels@google.com>:
Fix kMaxHeight bounds to kMaxDepth for CordrepBtreeNavigator
Added unit test (confirmed failure mode with old code) and extra assertion in the implementation.
PiperOrigin-RevId: 438327463
Change-Id: I32242c86b0c879b8a42cb9a92075e537d588e09f
--
f348e85dbfc9187ef59085fa2b999374f1670338 by Jorge Gorbe Moya <jgorbe@google.com>:
Make the flags enum in `RefcountAndFlags` a named enum to workaround an lldb
issue (https://github.com/llvm/llvm-project/issues/54602).
PiperOrigin-RevId: 438146097
Change-Id: Ibc2ee26489d99de515a779a903b6458dd0befef7
--
a960a3e9fb2a2e3418f806178e73d8566b78bc85 by Gennadiy Rozental <rogeeff@google.com>:
Introduce support for std::optional<T>/absl::optional<T> flag types.
PiperOrigin-RevId: 438129500
Change-Id: I3d925c0a7f9ce9f857277fac3b0bf664ccd3a95c
GitOrigin-RevId: fb671efb2a70f452f17a884b17cf18817b977a8f
--
291f7ef542f73e4801ab5108014bc02344ef31df by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 437835981
Change-Id: I42fd92e74903894533ac9984d7f622e3ba20f468
--
2e8caf1a57c50b518e05b4bca48e4fe1bb19af82 by Andy Getzendanner <durandal@google.com>:
Internal change
PiperOrigin-RevId: 437832673
Change-Id: I61b35089418d01a54cecf161b254b68252bebff3
--
b927482ccc399f7e337b60582988b914d9946e4e by Derek Mauro <dmauro@google.com>:
Simplify endian intrinsics for modern compilers
All modern compilers have either __builtin_bswapN (gcc, clang) or
_byteswap_TYPE (MSVC). The other intrinsic definitions are no longer
necessary.
PiperOrigin-RevId: 437772295
Change-Id: Ifb3d88ba24b9097f87ceb202272b36d2f5e5117f
--
b6782a2247a16d5c14706a74ec577c19963d9f97 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 437373174
Change-Id: I0f77e1780dee90d7a3c32a08d96c4aeb624a57b4
--
a53e0c724e37b0b01515a99bd25394b8e21ffdfc by Derek Mauro <dmauro@google.com>:
Unify detection of SSE2 and SSSE3 instruction sets and
include the proper headers
Fix the intrinsic implementation of FastHexToBufferZeroPad16 in
numbers.h which only relies on SSSE3, not SSE 4.2.
https://godbolt.org/z/Pf5bn1Yv9Closes#639
PiperOrigin-RevId: 437286940
Change-Id: Ic97948399b61b91e9c0bccd09313b795b904d714
--
f173f597cb2a75ef2a989f45a496334b85e6f40d by Abseil Team <absl-team@google.com>:
Change assertion function to enable clearer error messages.
PiperOrigin-RevId: 437227057
Change-Id: If420d2f63b51feef6648762f344d5be012cd9c85
GitOrigin-RevId: 291f7ef542f73e4801ab5108014bc02344ef31df
--
8c9dd24a6fbf9ed10ae81f9fa0bc2168558a9700 by Abseil Team <absl-team@google.com>:
Improve WebAssembly detection when using Bazel.
Unfortunately, the --cpu values are not standardized, and both
--cpu=wasm and --cpu=wasm32 are used in the wild. Most notably,
Emscripten's Bazel rules use --cpu=wasm, which was missing.
While there, add support for @platforms//cpu:{wasm32,wasm64}.
This change adds a dependency on @bazel_skylib, which requires
adding the following http_archive() rule to the WORKSPACE file:
http_archive(
name = "bazel_skylib",
urls = ["https://github.com/bazelbuild/bazel-skylib/releases/download/1.2.1/bazel-skylib-1.2.1.tar.gz"],
sha256 = "f7be3474d42aae265405a592bb7da8e171919d74c16f082a5457840f06054728",
)
PiperOrigin-RevId: 436815546
Change-Id: I4e1946070c6964abb12259f25a546f2d24e0992a
--
59514589043d9b0734a01f7aa7bc354f5b495eab by Abseil Team <absl-team@google.com>:
Fix some typos that slipped through.
PiperOrigin-RevId: 436777566
Change-Id: Ibf5c54e2671c749dc87d2bd5d36dcd220ce347d4
GitOrigin-RevId: 8c9dd24a6fbf9ed10ae81f9fa0bc2168558a9700
--
199bdbf9ad253b216ed6c6386bf69bc706330204 by Abseil Team <absl-team@google.com>:
Import of CCTZ from GitHub.
PiperOrigin-RevId: 435425408
Change-Id: I502d21ca5771d14e24fe41b28dc562ea6274996d
--
245a761e96f53857cef9c2359eac9d4bbcfdfd47 by Abseil Team <absl-team@google.com>:
Fix a -Wsign-compare -Wconversion problem in absl::btree discovered while getting cachelib to compile with those flags enabled.
PiperOrigin-RevId: 435419108
Change-Id: I0a9fa53d0163f678dde8960410315a5bc8445c72
GitOrigin-RevId: 199bdbf9ad253b216ed6c6386bf69bc706330204
--
5dc885f2b62993bccf33a3f3b99f7e460c819c89 by Derek Mauro <dmauro@google.com>:
Remove the internal-only ABSL_INTERNAL_ASSUME now that ABSL_ASSUME
is available and ABSL_INTERNAL_ASSUME has no more users.
Improve the documentation to ABSL_ASSUME somewhat.
PiperOrigin-RevId: 434803125
Change-Id: I7c27418463ffc1c7e10ecd50e2d17f348f686af7
--
4aea19a0ef596228c9136a4c2446e6f25085f23c by Derek Mauro <dmauro@google.com>:
Update documentation to warn against using absl::Hash across
dynamically loaded libraries
Fixes#1128
PiperOrigin-RevId: 434723247
Change-Id: Ib0c7ba03b2cab98b42e19e85be6833192d4b4067
GitOrigin-RevId: 5dc885f2b62993bccf33a3f3b99f7e460c819c89
--
7473df9e4922c589f6b27cf546aad097381ae552 by Martijn Vels <mvels@google.com>:
Make ABSL_ASSUME publicly available
PiperOrigin-RevId: 430540224
Change-Id: I760e2d86e3a0b676cd2a6d26e0225a77381e948f
--
c83e38bc421f715b3c1e20150c2f1ffe8e633028 by Abseil Team <absl-team@google.com>:
Alias absl::bind_front to std::bind_front if available
This avoids ambiguity between the two when enabling C++20.
PiperOrigin-RevId: 430486679
GitOrigin-RevId: 7473df9e4922c589f6b27cf546aad097381ae552
Change-Id: I1e9bba09a8946480ce10ddd28e86b6c86191d38c
--
91d76b3ac9edff91f206d9eee60423c39eeeaf93 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 430442277
--
9f8a87bcc5cc5b0fd8b7f0318f37d152fd8bea06 by Evan Brown <ezb@google.com>:
Small refactoring to work towards allowing for node_btree_* containers.
- Change common_params::transfer to rely on slot_policy transfer instead of manually doing construct/destruct. Transfer is not construct/destruct for node containers.
- Move maps' value_compare into btree.h from btree_map.h so it can be reused for node_btree_map.h.
- Also add a test for maps' value_compare protected members.
PiperOrigin-RevId: 430245542
--
0126e0b6295342317d9c9f0a66e2d7009b858426 by Martijn Vels <mvels@google.com>:
Add CordRepSubString::Create function with hard checks on IsFlat() | IsExternal()
This hardens internal invariants, IsFlat() || IsExternal() is a cheap, single predicted branch, and removes boilerplate code from cord.cc
PiperOrigin-RevId: 429676041
--
ed98a92af49d9e238d9f1d1b69fb4eddcd1ccbc7 by Abseil Team <absl-team@google.com>:
tweaks to status.h documentation to reflect general-purpose communication
PiperOrigin-RevId: 429584104
GitOrigin-RevId: 91d76b3ac9edff91f206d9eee60423c39eeeaf93
Change-Id: I54d6d116a564f86a842b983ca76559bf9b388f72
--
ceee18732f9499d3a53d46d5974f12ea0774b900 by Abseil Team <absl-team@google.com>:
Remove division from the profile guided optimization
PiperOrigin-RevId: 428444108
--
fc27059f1b0c0b4cb8ddd9a7a88220af52c0c755 by Evan Brown <ezb@google.com>:
Rename btree_node::leaf to is_leaf and also add is_internal for readability improvements.
PiperOrigin-RevId: 428076422
--
6a90d18477cc3a6de84282b6e38d6f294aa72748 by Evan Brown <ezb@google.com>:
In sanitizer mode, add generation integers to b-tree nodes and iterators and validate that iterators have not been invalidated already when they're used.
Even though generation integers are stored in all nodes, we only use the one stored in the root node for validation. The reason we keep one in all the nodes is that nodes can become a root node after they are allocated.
Also change the order of args in init_leaf to not violate the style guide.
PiperOrigin-RevId: 428054226
--
ede4a0f676f43e7003fd2599c263d55222e760ba by Martijn Vels <mvels@google.com>:
Physically remove CordRepConcat
This CL removes all uses of CordRepConcat. This change is executed by removing all the dead 'btree_enabled()' and 'IsConcat' branches, and all subsequent dead code. This change explicitly does not optimize any of the remaining code other than the most trivial ones such as removing 'stack' loop vars and loops.
PiperOrigin-RevId: 428002308
--
7cc83d96118149cf1aa1258a066b8fd4517df5f6 by Evan Brown <ezb@google.com>:
Change btree_iterator from a struct to a class.
Motivation: btree_iterator has private members and invariants so it should be a class.
Also merge two private sections.
PiperOrigin-RevId: 427768836
--
524d478b0af422e1a867a8823d9fbad149030360 by Martijn Vels <mvels@google.com>:
Physically block the creation of new CordRepConcat nodes.
This change removes CordRepConcat creation, issuing a FATAL errors on the (practically impossible) call path on broken invariants. This change is deliberately limited in impact, subsequent changes will be more voluminous ripping out the (now dead) CordRepConcat code.
PiperOrigin-RevId: 427741022
--
e21eb354c1bb358ea8b64d0e3fbb378e87b8b8c4 by Derek Mauro <dmauro@google.com>:
Update the implementation of ABSL_DEPRECATED to work with GCC, and
recommend using the standard attribute [[deprecated]] for C++14 and newer
GCC users that are experiencing new warnings can silence them with
-Wno-deprecated-declatations.
GCC users that want to see the warnings but not error on them can use
-Wno-error=deprecated-declarations.
PiperOrigin-RevId: 427228952
--
0ab4ee5660f3a072054dc4ab5056925c26977c7a by Laramie Leavitt <lar@google.com>:
Change comment to avoid overflow.
PiperOrigin-RevId: 427090218
GitOrigin-RevId: ceee18732f9499d3a53d46d5974f12ea0774b900
Change-Id: Ida00477b6a3d02a8b7bb467be7621b618385d1e9
--
4409b08e103d6e7041d18a4d431290cafe3650cf by Derek Mauro <dmauro@google.com>:
Workaround NVCC compile error in StringConstant
Based on a patch in TensorFlow:
da83132aba/third_party/absl/com_google_absl_fix_mac_and_nvcc_build.patch (L262-L282)Fixes#1105
PiperOrigin-RevId: 426156316
--
25db16567ffc5400dfaa30b567398ede84729687 by Abseil Team <absl-team@google.com>:
Only look for Elf64_Auxinfo on 64-bit FreeBSD.
PiperOrigin-RevId: 426132251
--
2e73c3d9df59b2b769d2b8dca97f0ca5c512c72a by Abseil Team <absl-team@google.com>:
Add a problem hint to the error message when dereferencing the end() iterator.
PiperOrigin-RevId: 426120394
--
6befbf89c47963656b9e8151166ab4c8446d4785 by Martijn Vels <mvels@google.com>:
Make Cord Btree the default and remove opt out machinery
This change makes btree the default Cord format and removes the machinery to opt out. Subsequent changes will remove the 'true' constant evaluation and effectively cleanup all old code and references to CONCAT.
PiperOrigin-RevId: 426119728
--
f6a0a664029d61811d90bd484f4eefa0400b5dd4 by Abseil Team <absl-team@google.com>:
Mark Notification::HasBeenNotified as ABSL_MUST_USE_RESULT
PiperOrigin-RevId: 425927033
GitOrigin-RevId: 4409b08e103d6e7041d18a4d431290cafe3650cf
Change-Id: I86f1052c63c13c6486baf4108de2554f162f9c40
--
121db1a08321eaa3006726cc32b459cf17880e35 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 425707805
--
0dec484389bbb75aae0a412146e3564bf833a739 by Derek Mauro <dmauro@google.com>:
macOS CI: Avoid depending on external sites like GitHub by prepopulating
dependencies and setting --distdir
Our Linux CI does this, but for some reason was never enabled on macOS
PiperOrigin-RevId: 425668638
GitOrigin-RevId: 121db1a08321eaa3006726cc32b459cf17880e35
Change-Id: Id51645df90b6a0808dd5b18eb636a10f798e24ea
--
dab53ef01a1c8ceebd1347a4918a0def0d7d4ce5 by Derek Mauro <dmauro@google.com>:
Migrate away from the remaining usages of GoogleTest's legacy TestCase API
and use the new TestSuite API instead
PiperOrigin-RevId: 424668744
GitOrigin-RevId: dab53ef01a1c8ceebd1347a4918a0def0d7d4ce5
Change-Id: I599de09f3349d18c2d74795b1f867fa6c99c3eed
--
7fbe730c56c0890f27df47f9ad4f0cfa600c6ad9 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 424639048
--
1825fcf704e45e881cdd1d2fe3eb2226f523f3cd by Derek Mauro <dmauro@google.com>:
Disable tests Table.EnsureNonQuadraticTopNXorSeedByProbeSeqLength and Table.EnsureNonQuadraticTopNLinearTransformByProbeSeqLength again
as they are (still) flaky
PiperOrigin-RevId: 424616745
--
e624119171d9bceec2f6df023b220a6642070cfb by Abseil Team <absl-team@google.com>:
Switch from *_TEST_CASE_P to *_TEST_SUITE_P gtest macros.
PiperOrigin-RevId: 424404790
--
a110698c10554fb1f640412db8cd7c5a38b7b8e8 by Abseil Team <absl-team@google.com>:
Remove extraneous newline in documentation.
PiperOrigin-RevId: 424328502
GitOrigin-RevId: 7fbe730c56c0890f27df47f9ad4f0cfa600c6ad9
Change-Id: I56fd8c7cecf65fe37cb4cf2dde70842867d637d7
--
505dc83f11dbc14d6e493d83ed6451966629fe71 by Evan Brown <ezb@google.com>:
In debug mode, make b-tree adapt comparators to do checking to diagnose invalid non-strict-weak-ordering comparators.
Reference: https://en.cppreference.com/w/cpp/named_req/Compare
- Add an opt-out mechanism for tests that rely on counting the number of comparisons.
- Use the unadapted comparator (original_key_compare) in making the use_linear_search decision so is_same still works.
PiperOrigin-RevId: 423889350
GitOrigin-RevId: 505dc83f11dbc14d6e493d83ed6451966629fe71
Change-Id: I65b0ba489c69c8dcfb107684db84f3f7f4d72daa
--
75504b9d2eb7560359b98b69136d071f980e04f2 by Abseil Team <absl-team@google.com>:
Fix typos in documentation.
PiperOrigin-RevId: 423376798
--
bf87e5de48a868f49a57d516be027e6e3a3cc3bd by Gennadiy Rozental <rogeeff@google.com>:
Correct WEAK attribute enabling condition.
ABSL_ATTRIBUTE_WEAK is present if:
compiler has built-in attribute weak
OR
we are using gcc (and not clang)
AND
we are not on windows
OR
we use windows clang version >= 9.0.0
AND
we are not on MinGW
PiperOrigin-RevId: 423357629
--
a01a8f1b7ea3da4ec349db452162a3333953dd9d by Abseil Team <absl-team@google.com>:
There are magic numbers in the expected load factors and probe lengths, and they seem to be wrong especially under msvc. Even under the linux tool chain, these tests fail occasionally. Fix the magic numbers to make the tests succeed.
PiperOrigin-RevId: 423320829
--
fd109295a1425ca1cb2b69fe34a294b6189542c0 by Laramie Leavitt <lar@google.com>:
Manually align buffers in randen_engine.
In C++ it's implementation defined whether types with extended alignment are supported.
randen_engine uses vector intrinsics with 16-byte alignment requirements in
some instances, so internally we allocate an extra 8 bytes to manually align to 16.
No detectable performance impact.
PiperOrigin-RevId: 423109265
GitOrigin-RevId: 75504b9d2eb7560359b98b69136d071f980e04f2
Change-Id: I8c5ab2269ff6d9e89d3b4d0e95d36ddb6ce8096e
--
487c7a754a3b93bc0f9de14bdced48007a96ae55 by Greg Falcon <gfalcon@google.com>:
Add support for absl::Hash to hash unordered containers. These can now be hashed directly, as well as combined in AbslHashValue implementations.
This also adds a new method, `H::combine_unordered()`, to the public AbslHashValue hash state API. This allows users to implement hash specializations for their own unordered collection types.
A traits class, `H::is_hashable<T>`, is also added to the hash state API. H::is_hashable<T>::value reflects whether type T is considered hashable by the AbslHashValue framework. This allows users to properly SFINAE templated versions of AbslHashValue. (The AbslHashValue implementation added to raw_hash_set shows an example of its use.)
PiperOrigin-RevId: 422856706
GitOrigin-RevId: 487c7a754a3b93bc0f9de14bdced48007a96ae55
Change-Id: Id31fd4ccba282f8c9ae6fcee6ae0ad0f7879f456
--
7f5caec21a1a88db6486b8bc2e5f6d5baba076ed by Derek Mauro <dmauro@google.com>:
Tag absl::StatusOr with [[nodiscard]] when it is available
[[nodiscard]] provides better diagnostics on classes than the current
ABSL_MUST_USE_RESULT, which expands to
__attribute__((warn_unused_result))
Ideally we would make ABSL_MUST_USE_RESULT expand to [[nodiscard]], but
we would need to fix all code to build with [[nodiscard]] first.
PiperOrigin-RevId: 422628161
--
236be69f0f34ccaa3adc831075613847797e6557 by Jorg Brown <jorg@google.com>:
Make sure all of absl/strings compiles even with -Wsign-compare and -Wconversion warnings.
PiperOrigin-RevId: 422573904
--
005669883a8794e6d19dc4bbb4f0e18032e2fbc9 by Chris Kennelly <ckennelly@google.com>:
Include sampling stride in hashtable sampling data.
This allows us to weight each sample to control for our sampling rate.
PiperOrigin-RevId: 421886935
--
78046ce6b429b9f5b6c97b05e8448a791db93bbe by Abseil Team <absl-team@google.com>:
Use __builtin_bit_cast for absl::bit_cast when possible
This makes absl::bit_cast match the requirements of the standard when compiler support exists.
PiperOrigin-RevId: 421883999
--
f397461f4bbeabd32437df0f2275663aeb51adb2 by Derek Mauro <dmauro@google.com>:
Tag absl::Status with [[nodiscard]] when it is available
[[nodiscard]] provides better diagnostics on classes than the current
ABSL_MUST_USE_RESULT, which expands to
__attribute__((warn_unused_result))
Ideally we would make ABSL_MUST_USE_RESULT expand to [[nodiscard]], but
we would need to fix all code to build with [[nodiscard]] first.
PiperOrigin-RevId: 421825565
GitOrigin-RevId: 7f5caec21a1a88db6486b8bc2e5f6d5baba076ed
Change-Id: I760b45b68f6012809c70c2a584e4144a99f98733
--
0db7f4046f9b59c0f8c3df2f0eb7fd88fc328439 by Abseil Team <absl-team@google.com>:
Revise documentation of bit_cast:
* Removes inappropriate examples (round-tripping pointers, serialization), for which reinterpret_cast is more appropriate.
* Removes mention of "bit representation", which is not an explicit notion in C++. The best we get is "byte representation".
* Removes a circular defition of "bitcast" as itself, and instead explains what it does.
* Removes the mathism "for some values of", which is probably not totally accessible to a general audience, and in any case needless verbiage.
* Fixes comments in the example.
* Replaces some colloquialisms with simpler, more direct language.
PiperOrigin-RevId: 421791786
--
e04e64df55d93c1b9a09c0483b97cc4d8763260d by Derek Mauro <dmauro@google.com>:
Update Docker image to use GCC 11.2, Clang 14 (prerelease),
CMake 3.22.1, and Bazel 4.2.2
PiperOrigin-RevId: 421658559
--
d002bb3dc5cd1fc5b4cbd79a450efc894caa567c by Chris Kennelly <ckennelly@google.com>:
Add a small microbenchmark for absl::bit_width.
PiperOrigin-RevId: 421604852
--
131b057d1b76ecd7170421b48d661bb958ff676b by Evan Brown <ezb@google.com>:
Adds a disabled test for EBO in nested `CompressedTuple`s.
PiperOrigin-RevId: 421413134
--
e34c7876d3a1212d90c73c030ccae6169b682d43 by Jorg Brown <jorg@google.com>:
Show users a better error message if they pass a pointer to absl::Uniform.
PiperOrigin-RevId: 421090472
GitOrigin-RevId: 0db7f4046f9b59c0f8c3df2f0eb7fd88fc328439
Change-Id: I5a004e8d17e974fa4897a09d1466ae8fc65dfdbb
--
04e8fdf6a37d31f9364ca0f70bf663ee972481c6 by Abseil Team <absl-team@google.com>:
Another implicit sign conversion found and removed.
PiperOrigin-RevId: 419718762
--
dbb6bca7d3cfa9ce79e70d0ed3d0354a4e3a0983 by Abseil Team <absl-team@google.com>:
Fix sign conversions so that absl/status/status.h can compile with -Wconversion -Wsign-compare
PiperOrigin-RevId: 419658075
GitOrigin-RevId: 04e8fdf6a37d31f9364ca0f70bf663ee972481c6
Change-Id: I18441488cc84f573c2818ee241c387e1953d5105
--
cca8a0c0d709803ce3413861ccbdb1b47e8fdcef by Abseil Team <absl-team@google.com>:
Add AssertHeld() to SpinLock.
PiperOrigin-RevId: 418034654
--
9e95a0e614b4cd7929d8db4324ca69d7be5351b2 by Evan Brown <ezb@google.com>:
Make btree use an unsigned size_type (size_t).
This brings btree in line with std::set, et al., which are required to use an unsigned size type - see https://en.cppreference.com/w/cpp/container/set.
Also avoid some warnings about comparing integers of different signs.
PiperOrigin-RevId: 418014466
GitOrigin-RevId: cca8a0c0d709803ce3413861ccbdb1b47e8fdcef
Change-Id: I2b951cf1d69a3bb9c8dc236c69ab4a06b45047ea
--
07240ca7822d007cdcc79f2c40bd58b2c2010348 by Abseil Team <absl-team@google.com>:
Correct the comment from "AlphaNum" to "Arg".
PiperOrigin-RevId: 416139192
--
adcba4a6b3763626e1db7b1e8c108b3114903557 by Martijn Vels <mvels@google.com>:
Fix NewExternalRep() to require data being non-empty, and remove nullptr return.
PiperOrigin-RevId: 416135865
--
c0d14cd918fb16f15d1d84de9284b5c5ecc1f8f2 by Abseil Team <absl-team@google.com>:
Fix doc comment for absl::ascii_isprint().
The comment was incorrectly saying that it includes all whitespace.
It doesn't; the only whitespace char it includes is ' '.
PiperOrigin-RevId: 416112524
--
d83327800159c07002b6865e21232a12463e02dd by Abseil Team <absl-team@google.com>:
Internal change
PiperOrigin-RevId: 416099978
--
baf11e9ca42ca9140cdbf8075f971db8d65b1195 by Ilya Tokar <tokarip@google.com>:
Prevent compiler from optimizing Group_Match* benchmarks away.
Currently we benchmark single store of precomputed value.
Not all affected benchmarks show performance changes:
BM_Group_Match 0.53ns ± 1% 0.53ns ± 0% -0.42% (p=0.038 n=10+10)
BM_Group_MatchEmpty 0.26ns ± 1% 0.26ns ± 1% ~ (p=1.000 n=10+10)
BM_Group_MatchEmptyOrDeleted 0.26ns ± 1% 0.26ns ± 1% ~ (p=0.121 n=10+10)
BM_Group_CountLeadingEmptyOrDeleted 0.26ns ± 1% 0.45ns ± 0% +70.05% (p=0.000 n=10+8)
BM_Group_MatchFirstEmptyOrDeleted 0.26ns ± 0% 0.44ns ± 1% +65.91% (p=0.000 n=8+9)
But inspecting the generated code shows the difference,
e. g. BM_Group_MatchFirstEmptyOrDeleted
Before:
add $0xffffffffffffffff,%rbx
jne 30
After:
pcmpeqd %xmm0,%xmm0
pcmpgtb -0x30(%rbp),%xmm0
pmovmskb %xmm0,%eax
add: 0x23$0xffffffffffffffff,%rbx
jne 40
PiperOrigin-RevId: 416083515
--
122fbff893dc4571b3e75e4b241eb4495b925610 by Abseil Team <absl-team@google.com>:
Put namespace guard in ABSL_DECLARE_FLAG to make declaring a flag in a namespace a compiler error instead of a linker error.
PiperOrigin-RevId: 416036072
--
020fd8a20f5fa319e948846e003391fcb9e03868 by Ilya Tokar <tokarip@google.com>:
Make Cord::InlineRep::set_data unconditionally zero out memory.
Currently there is a single case where we don't zero out memory
as an optimization. Unconditional zeroing doesn't show any changes
in benchmarks, except for the unrelated improvement:
BM_CordPartialCopyToCord/1M/1 12.6ns ± 4% 12.6ns ± 4% ~ (p=0.857 n=16+19)
BM_CordPartialCopyToCord/1M/128 44.9ns ± 7% 45.0ns ± 3% ~ (p=0.468 n=18+17)
BM_CordPartialCopyToCord/1M/1k 64.5ns ± 4% 61.4ns ± 4% -4.82% (p=0.000 n=19+17)
BM_CordPartialCopyToCord/1M/8k 139ns ± 3% 128ns ±15% -7.76% (p=0.009 n=17+20)
BM_CordPartialCopyToCord/1M/16k 193ns ± 6% 168ns ± 6% -13.17% (p=0.000 n=17+17)
BM_CordPartialCopyToCord/4M/16k 199ns ± 4% 177ns ± 4% -11.36% (p=0.000 n=17+18)
BM_CordPartialCopyToCord/4M/32k 275ns ± 3% 250ns ± 4% -9.00% (p=0.000 n=18+18)
BM_CordPartialCopyToCord/4M/64k 291ns ± 4% 266ns ± 5% -8.53% (p=0.000 n=18+16)
BM_CordPartialCopyToCord/4M/128k 322ns ± 5% 291ns ± 4% -9.43% (p=0.000 n=20+18)
BM_CordPartialCopyToCord/8M/32k 281ns ± 5% 251ns ± 4% -10.38% (p=0.000 n=20+16)
BM_CordPartialCopyToCord/8M/64k 293ns ± 6% 267ns ± 4% -8.87% (p=0.000 n=16+19)
BM_CordPartialCopyToCord/8M/128k 334ns ± 3% 305ns ± 2% -8.56% (p=0.000 n=17+16)
This is clearly an alignmnet effect since number of the executed instructions is the same:
M_CordPartialCopyToCord/1M/1 155 ± 0% 155 ± 0% ~ (all samples are equal)
BM_CordPartialCopyToCord/1M/128 446 ± 0% 446 ± 0% ~ (p=0.332 n=36+39)
BM_CordPartialCopyToCord/1M/1k 473 ± 0% 473 ± 0% ~ (p=0.969 n=40+40)
BM_CordPartialCopyToCord/1M/8k 808 ± 0% 808 ± 0% ~ (p=0.127 n=40+39)
BM_CordPartialCopyToCord/1M/16k 957 ± 0% 957 ± 0% ~ (p=0.532 n=40+40)
BM_CordPartialCopyToCord/4M/16k 952 ± 0% 952 ± 0% ~ (p=0.686 n=39+39)
BM_CordPartialCopyToCord/4M/32k 1.12k ± 0% 1.12k ± 0% ~ (p=0.690 n=40+40)
BM_CordPartialCopyToCord/4M/64k 1.23k ± 0% 1.23k ± 0% ~ (p=0.182 n=40+39)
BM_CordPartialCopyToCord/4M/128k 1.44k ± 0% 1.44k ± 0% ~ (p=0.711 n=40+40)
BM_CordPartialCopyToCord/8M/32k 1.12k ± 0% 1.12k ± 0% ~ (p=0.697 n=40+40)
BM_CordPartialCopyToCord/8M/64k 1.23k ± 0% 1.23k ± 0% +0.00% (p=0.049 n=40+40)
BM_CordPartialCopyToCord/8M/128k 1.44k ± 0% 1.44k ± 0% ~ (p=0.507 n=40+40)
This makes code simpler and doesn't regress performance.
PiperOrigin-RevId: 415560574
--
37305b2690b31682088749e4d62f40d7095bdc54 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 415558737
--
86aaed569b9e743c1eb813a5f48def978a793db3 by Martijn Vels <mvels@google.com>:
Internal change
PiperOrigin-RevId: 415515201
--
6cdb8786cdcb4fa0b8a4b72fc98940877d1fdeff by Abseil Team <absl-team@google.com>:
Update SubmitMutexProfileData to accept wait_cycles instead of wait_timestamp
PiperOrigin-RevId: 415360871
--
9f979d307aa16ad09f214e04876cbe84395c0901 by Abseil Team <absl-team@google.com>:
absl::flat_hash_set compiles with -Wconversion -Wsign-compare
PiperOrigin-RevId: 415357498
--
9eceb14174708f15e61259d449b214a8a4c7f9e7 by Abseil Team <absl-team@google.com>:
Fix AddressIsReadable for the corner case of (aligned) addr == NULL.
PiperOrigin-RevId: 415307792
--
1a39ffe55898375e2d7f88c17c99db5a1b95b313 by Martijn Vels <mvels@google.com>:
Internal change
PiperOrigin-RevId: 415162872
--
64378549b110d5f5762185a5906c520fba70f0e7 by Abseil Team <absl-team@google.com>:
Fix a typo in the comments
PiperOrigin-RevId: 415088461
--
41aae8322e913b82710153c22b97c611fdb6e1fb by Abseil Team <absl-team@google.com>:
Switch from `connect` to `rt_sigreturn` -- the latter is much less problematic
for system call sandboxes.
PiperOrigin-RevId: 415073965
--
870c5e3388b6a35611bff538626fe7a1c8c87171 by Abseil Team <absl-team@google.com>:
Add ABSL_HAVE_HWADDRESS_SANITIZER and ABSL_HAVE_LEAK_SANITIZER
PiperOrigin-RevId: 414871189
--
f213ed60a66b58da7ac40555adfb1d529ff0a4db by Derek Mauro <dmauro@google.com>:
Remove reference to __SANITIZE_MEMORY__, which does not exist
It appears to have been copied by pattern matching from the ASAN/TSAN
code blocks.
f47662204d/gcc/cppbuiltin.c (L79-L126)
PiperOrigin-RevId: 414806587
--
b152891e73ab515f397ceb53f66c8ee2f33863ea by Abseil Team <absl-team@google.com>:
Rollback previous commit: SYS_open is not defined in certain environments.
PiperOrigin-RevId: 414521820
--
5a1cbb282331023902e1374dd0d920c4effbe47f by Abseil Team <absl-team@google.com>:
Use syscall(SYS_open, ...) instead of open() to avoid possible symbol
interposition.
Also add some warning notes.
PiperOrigin-RevId: 414508186
--
1824d6593612710aafdc599a89b0adced7d787f6 by Abseil Team <absl-team@google.com>:
Correct aarch64 macro check
The macro is __aarch64__, not __arch64__.
PiperOrigin-RevId: 414446225
--
a1536a57b64dfd53945d33a01cfc08b18c99c97b by Abseil Team <absl-team@google.com>:
Fix backwards comment in the last commit.
PiperOrigin-RevId: 414281214
--
11ac021ba779513667a31cf2563ddafc57d6d913 by Abseil Team <absl-team@google.com>:
AddressIsReadable() didn't work correctly on ARM when the given pointer was
misaligned at the end of the page.
Fix that by aligning the pointer on an 8-byte boundary before checking it.
PiperOrigin-RevId: 414203863
GitOrigin-RevId: 07240ca7822d007cdcc79f2c40bd58b2c2010348
Change-Id: If5f129194d59f5c9e5d84efd8cd9e17a70e072ab
--
e7f53dfbf809812e84770217777f81b6308a3084 by Abseil Team <absl-team@google.com>:
Add a parameter pack to absl profile to allow profiles to separate
dynamic data from static data that is available at constructor-time.
Background: `inline_element_size` is effectively constant, but there
is a data race between its initialization and its access. We had fixed that race by making
inline_element_size atomic. This CL changes `inline_element_size`
back to a non-atomic integer, and provides a way for all profiles to
provide Register()-time values.
PiperOrigin-RevId: 413960559
--
70234c5943f8e37e17c1d9c54d8ed61d39880abf by Chris Kennelly <ckennelly@google.com>:
Document that absl::FunctionRef does not allocate.
PiperOrigin-RevId: 413946831
--
3308ae571412c4be3cc32d088c6edac98ff2d1ed by Samuel Benzaquen <sbenza@google.com>:
Internal change
PiperOrigin-RevId: 413933619
--
1617093a730d055edcf7bc04fdd6509783f5f75d by Martijn Vels <mvels@google.com>:
Internal Change
PiperOrigin-RevId: 413778735
--
03ad683f059c806a6c8b04f5b79b2662c3df8c73 by Evan Brown <ezb@google.com>:
Unify btree erase_if definitions and optimize them so that we only do rebalancing once per leaf node.
PiperOrigin-RevId: 413757280
--
5ba402f70801938178e486617063f01c7862525d by Martijn Vels <mvels@google.com>:
Cleanup up cord sampling internals
PiperOrigin-RevId: 413755011
--
522da8f9d3e0f11630d89fb41952004742bc335a by Evan Brown <ezb@google.com>:
Add b-tree benchmark for erase_if.
Since this benchmark doesn't work for std:: containers before C++20, disable it for them.
PiperOrigin-RevId: 413740844
--
a690ea42de8ed4a761d00235d8b2fb7548ba9732 by Andy Getzendanner <durandal@google.com>:
Import of CCTZ from GitHub.
PiperOrigin-RevId: 413735737
GitOrigin-RevId: e7f53dfbf809812e84770217777f81b6308a3084
Change-Id: I4f9f9039ba92831bc48971964aa063244c9fed72
--
08d99ee216b7bfac1c5182db952d4e053e5ebc31 by Abseil Team <absl-team@google.com>:
Fix race condition reported by tsan on `inline_element_size` in hashtablez.
PiperOrigin-RevId: 413520771
GitOrigin-RevId: 08d99ee216b7bfac1c5182db952d4e053e5ebc31
Change-Id: Ibd396803f04a659cfbdb8dc7ec37511643657694
--
e2a571b818faaec4185426a8cf71fd2970674423 by Matt Kulukundis <kfm@google.com>:
Fix missed use of old RTTI macro
PiperOrigin-RevId: 413239579
--
e3c15a3fe0a4e44d6e08d69ad912b2245a403bd6 by Derek Mauro <dmauro@google.com>:
Makes erase_if return the number of erased elements for compatibility
with C++20
https://en.cppreference.com/w/cpp/container/unordered_map/erase_if
This may technically be an API break, but no actual breaks were found
in Google code. Fixes to open source code should be trivial.
Closes#1065
PiperOrigin-RevId: 413204392
--
c1fb1ddbc2def3f3d177e5b80b9934bdbb7b16fc by Matt Kulukundis <kfm@google.com>:
Consolidate to a single HAS_RTTI macro
PiperOrigin-RevId: 413169336
GitOrigin-RevId: e2a571b818faaec4185426a8cf71fd2970674423
Change-Id: I74b78ebd5fc172e3f5fcbd13a58cf53f7b250ae9
--
a9ea60e9c0ccd744b6f12fd021dbedfe826dfe84 by Matt Kulukundis <kfm@google.com>:
Add an internal hook to allow keeping flags in sync with global state.
Rollforward, except continue including hashtablez_flags.h in absl_flags.h so users don't break.
PiperOrigin-RevId: 412198044
--
183e5c440b68c797ce4a82102f94f41c97a14674 by Martijn Vels <mvels@google.com>:
Internal cleanups and changes
PiperOrigin-RevId: 412083793
--
3740faf7c5a2e1723e3c7e4d1b3f3db7cbec6e61 by Abseil Team <absl-team@google.com>:
Mark Cord::Clear() with the ABSL_ATTRIBUTE_REINITIALIZES attribute.
This prevents false positives in the clang-tidy check bugprone-use-after-move; it allows Clear() to be called on a moved-from Cord without any warnings, and the Cord will thereafter be regarded as initialized again.
PiperOrigin-RevId: 412082757
--
a730d3f4ba06b55ae50386920a0544592069ac01 by Abseil Team <absl-team@google.com>:
StrJoin: Support iterators that do not have an `operator->`
Allows using `StrJoin` with iterators that do not have an `operator->`.
The `operator->` requirement for input iterators was dropped in C++20.
PiperOrigin-RevId: 412066130
--
6773c0ced2caa6a7855898298faecc584f3997ec by Andy Soffer <asoffer@google.com>:
Rollback of internal hook for keeping flags in sync with global state.
PiperOrigin-RevId: 411895027
--
4e7016a2fb88ce97853ef85ad5b4f76998eacca1 by Matt Kulukundis <kfm@google.com>:
Add an internal hook to allow keeping flags in sync with global state.
PiperOrigin-RevId: 411867376
--
2a7d4056e467b6b5d8a7aa9398d6cb5454c10fc5 by Martijn Vels <mvels@google.com>:
Internal change
PiperOrigin-RevId: 411806932
GitOrigin-RevId: a9ea60e9c0ccd744b6f12fd021dbedfe826dfe84
Change-Id: Ib35bb7b40774979ed2ad205bbb1744b1085eae78
--
2130ba98c8359b08d97fb16d84dfd05687005dcf by Abseil Team <absl-team@google.com>:
Tweaking the documentation of c_all_of to state the effect more directly.
PiperOrigin-RevId: 410557900
--
4732289bf4b56123fed113e36be4710b55c6a6c7 by Greg Falcon <gfalcon@google.com>:
Improve the quality of absl::Hash<std::vector<bool>>.
This previously dispatched to std::hash<vector<bool>>, which suffers from trivial collisions on many platforms. (They often hash the internal words but no size info, so that, e.g., {1, 1} and {1, 1, 0} collide.)
Also extended the unit test to exercise this.
PiperOrigin-RevId: 410329943
--
1c5f3934230a7669f74c96b305251786a265e235 by Greg Falcon <gfalcon@google.com>:
Add broader testing of absl hash contracts in the hash unit test.
In particular, test that the hash erasure mechanism works.
PiperOrigin-RevId: 410312738
--
5e1923f527ed3d02f6752a5b38d5e1c17a4a146f by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 410290663
--
8c74bc962b3b98a5908017c345efc592393048ea by Martijn Vels <mvels@google.com>:
Add Cord::CreateFlat() function
PiperOrigin-RevId: 410260776
--
bd0de4e94c85620d3b8dd60fae367b730fc4cb34 by Evan Brown <ezb@google.com>:
Rename node_hash_policy to node_slot_policy.
Motivation: we can potentially reuse this code for node_btree_*.
PiperOrigin-RevId: 410082271
GitOrigin-RevId: 2130ba98c8359b08d97fb16d84dfd05687005dcf
Change-Id: Ie052084cf992dee250d8b2f388d39c4de0dcff40
--
355b8f7b0070b005d53d94ee4180e95559ba2c88 by Derek Mauro <dmauro@google.com>:
Documentation: don't define absl::Status::ok() in terms of itself
Fixes#1058
PiperOrigin-RevId: 410035651
--
31c512c834b3a8979297adc5006c3727a3c6554b by Evan Brown <ezb@google.com>:
Cleanup: move set_params/set_slot_policy into btree_set.h and move map_params into btree_map.h.
Also change some `sizeof(value_type)`s to `sizeof(slot_type)`s and update some comments/variable names referring to values to refer to slots as appropriate in btree.h.
Motivation: preliminary cleanup towards node_btree_*.
PiperOrigin-RevId: 409991342
--
3129ca320d61a82f1c9ee8c02a23d25024eea4ab by Abseil Team <absl-team@google.com>:
Use simpler implementation for AddressIsReadable.
In particular, current solution doesn't work on systems configured with large
pid_t space.
PiperOrigin-RevId: 409397716
--
f71067f7494b19ce4a2e1df730b934dc931c51b2 by Martijn Vels <mvels@google.com>:
Add Span dependency
PiperOrigin-RevId: 409198889
GitOrigin-RevId: 355b8f7b0070b005d53d94ee4180e95559ba2c88
Change-Id: I7f4df3ec7739fdfde61d8ba983f07a08f6f1c7d7
--
4324716dc5384f03dcd7e36e8cca0e944e4dac74 by Evan Brown <ezb@google.com>:
Clarify comments about API differences from std::{set,map} in btree headers.
We note that the most important API differences are mentioned in the next paragraph and that other API differences are minor. An example of another minor API difference is the note about std::launder in the comment for `extract`.
Motivation: readers shouldn't feel like they need to read the entire header file to understand why b-tree containers are not "drop-in replacements" for STL containers.
PiperOrigin-RevId: 408703780
--
7e8da4f14afd25d11713eee6b743ba31605332bf by Derek Mauro <dmauro@google.com>:
Remove the test for absl::base_internal::NominalCPUFrequency() from OSS code
This is an internal-only function that should never by called by OSS code.
By its nature fails on unsupported platforms.
Google code has tests for this function on supported internal platforms.
Fixes#1053
PiperOrigin-RevId: 408692861
--
37bad2e003b17e3f82d6fd5d90ae183553c018b0 by Abseil Team <absl-team@google.com>:
To avoid triggering -Wmissing-variable-declarations warnings, ABSL_FLAG now
declares the Flag before defining it.
PiperOrigin-RevId: 408673990
GitOrigin-RevId: 4324716dc5384f03dcd7e36e8cca0e944e4dac74
Change-Id: I8c8ea73c4a4e38729c5bfdfa3fefb5d593e0536c
--
83e4cdf03a4d702b30e69204060de09e462e23c6 by Greg Falcon <gfalcon@google.com>:
Revert the crc addition to RefcountAndFlags, and restore related comments to their original state.
In development, the implementation of SetExpectedCrc() changed, and there is no longer a need to track the CRC status in the refcount.
Since the distinction between IsOne() and IsMutable() is subtle *and unused*, removing it now can help avoid subtle bugs in the future. This distinction can always be added back later, if it proves necessary.
Keep the reserved bit for now; all it costs is one extra mask instruction in the refcount checks, and space for extra state in Cord is always hard to find.
PiperOrigin-RevId: 408647038
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ee67585cf66954176615271f50f8b278119dd138 by Greg Falcon <gfalcon@google.com>:
Implement Cord::SetExpectedChecksum() and Cord::ExpectedChecksum().
SetExpectedChecksum() will store a uint32_t out-of-band alongside a Cord's data. This value persists through copies and assignments. Mutating operations on a Cord cause the value to be forgotten. ExpectedChecksum() retrieves the stored value, if present.
This API is intended for storing a CRC32C checksum alongside data, allowing checksums to be passed through dataflows and validated at the final step. However, this API is agnostic to the meaning of the stored value. No CRC32C validation is performed by these new APIs.
This implementation adds a new CordRep node, CordRepCrc. A CordRepCrc may (currently) only live at the top of a tree. This allows traversal logic to be agnostic to these nodes, instead putting the needed branches at the mutation level. This also implements the property requested from API review, that any mutation is guaranteed to permanently forget the stored CRC.
PiperOrigin-RevId: 408611221
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a86f592402b37c854ebdc77d2b9b425451a7a675 by Martijn Vels <mvels@google.com>:
Move 'ExtractResult' into CordRep
The result of an extract operation is logically identical for any tree implementation, and having a single type makes 'tree independent' implementation in cord.cc more concise.
PiperOrigin-RevId: 408332408
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baa7647e21db59a87f75af9cac62172ce38a0f71 by Abseil Team <absl-team@google.com>:
Replace usages of `assert` macros with `ABSL_HARDENING_ASSERT`.
PiperOrigin-RevId: 408272133
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c7658133d8662c39fa5035fc93a364c7c3d327e0 by Martijn Vels <mvels@google.com>:
Add CordRepBtree::ExtractAppendBuffer
PiperOrigin-RevId: 407944179
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5775100363b5890ebfe710fadebf040445eab991 by Martijn Vels <mvels@google.com>:
Add CordRepConcat::ExtractAppendBuffer
PiperOrigin-RevId: 407932968
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9f520ba1600a93352c78f644a369c7c76195ee86 by Greg Falcon <gfalcon@google.com>:
Add cordz tracking for crc nodes.
This also adds a new kSetExpectedChecksum method to the list of tracked methods. This is presently unused but will be used soon.
PiperOrigin-RevId: 407884120
GitOrigin-RevId: 83e4cdf03a4d702b30e69204060de09e462e23c6
Change-Id: I134ace2d87215813eaa60a282996a33884676c06
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9f6ef337f282272bc098330c9ccacd9d39155db4 by Abseil Team <absl-team@google.com>:
Make DestroyElements an empty function if the value types are trivially deconstructible.
PiperOrigin-RevId: 407345743
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a639bbf6f22446d6ba3da9e2c205e26cda4bebc5 by Derek Mauro <dmauro@google.com>:
Add ctest --output-on-failure to the CMake install test
PiperOrigin-RevId: 407333671
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54d0577fa6ba1159c6a86410ae185c52f4afaff6 by Derek Mauro <dmauro@google.com>:
Fix Android build of elf_mem_image.cc
PiperOrigin-RevId: 407331032
GitOrigin-RevId: 9f6ef337f282272bc098330c9ccacd9d39155db4
Change-Id: I7e13f01cd804aec50f280ac25934c9ec48ef3c5f
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05a099a580753f8e96cee38572e94dcdc079361b by Abseil Team <absl-team@google.com>:
Import of CCTZ from GitHub.
PiperOrigin-RevId: 405966217
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c6b81e9ebc183d8389f14ecd091c8bad08cfe0aa by Abseil Team <absl-team@google.com>:
Add `inline_element_size` to hashtablez (so that we can compute the weighted load factors properly e.g., in b/187896534).
PiperOrigin-RevId: 405917711
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3e3673de4e54e4142c54b09e1644dfa3de4bb296 by Abseil Team <absl-team@google.com>:
align indent of code comment in mutex.h
PiperOrigin-RevId: 405871997
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2248301a5b14f8d2be5b2e9088f3528a353ea491 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 405639236
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bc7d3c56fdad3dde4b89324af142529f2afe5f1b by Abseil Team <absl-team@google.com>:
Import of CCTZ from GitHub.
PiperOrigin-RevId: 405508045
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66472387276ef02505d99195747be862768bb35b by Laramie Leavitt <lar@google.com>:
Also use uint8_t golden values in randen_test.cc
This makes randen_test, randen_slow_test, and randen_hwaes_test essentially
identical, as is the intent.
PiperOrigin-RevId: 405484423
GitOrigin-RevId: 05a099a580753f8e96cee38572e94dcdc079361b
Change-Id: I3dd5b0cfdb98d6e1ab02266194ba67d15428c2f8
Derek Mauro
Abseil Team
Evan Brown
Tom Rybka
Jose Renau
Greg Falcon