abseil-cpp

82 Commits

9 Branches

22 Tags

14 MiB

Tag: Branch: Tree: 4b915e7092

Commit Graph

Author	SHA1	Message	Date
Abseil Team	1995c6a3c2	Export of internal Abseil changes -- 790f9061df340cd900e8da70e66c363f7af3c2eb by Abseil Team <absl-team@google.com>: Add support for rvalue reference to function types. PiperOrigin-RevId: 324508531 -- 51fe201dbb41a3ebc3d49ff65250b5f464279d43 by Abseil Team <absl-team@google.com>: Cleaning up function comment style; no substantive change. PiperOrigin-RevId: 324497401 -- da8595d5266577d0c170528d12f6de17b8affcc2 by Abseil Team <absl-team@google.com>: Add support for demangling GNU vector types. PiperOrigin-RevId: 324494559 -- 0cb0acf88c1750f6963c9cb85249f9b4f0bd5104 by Abseil Team <absl-team@google.com>: Add support for thread-local types. PiperOrigin-RevId: 324491183 -- c676bc8380560599cd26f7f231e04e6be532e904 by Abseil Team <absl-team@google.com>: Add support for demangling "Du" (char8_t). PiperOrigin-RevId: 324441607 -- b218bf6467bc62b327214782c881e8224ad91509 by Abseil Team <absl-team@google.com>: Update doc comments in header of `any.h` to reflect that `absl::variant` has been released. PiperOrigin-RevId: 324431690 -- e5b579f3f1aa598c1f62e71dba7103b98811de59 by Laramie Leavitt <lar@google.com>: Bugfix: Fix bounds in absl::Uniform where one of the bounds is min/max. When absl::Uniform(rng, tag, a, b) is called, the tag is used in conjunction with the type to determine whether or not to manipulate the bounds to make them inclusive or exclusive through the uniform__bound functions. Unfortunately, at limits of the interval the function was not well behaved. The previous implementation used wrapping arithmetic. This causes incorrect bounds computation at the extremes (numeric_limits::min / numeric_limits::max) the bound would wrap. Improve this situation by: 1/ Changing the uniform__bound functions to use saturating arithmetic instead of wrapping, thus in the unsigned case, the upper_bound of IntervalOpenOpen for 0 is now 0, rather than numeric_limits::max, likewise for the lower bound. 2/ Adjusting the hi/lo checks in the distributions. When the interval is empty, such as for absl::Uniform(absl::IntervalOpenOpen, gen, 1, 0), the return value is somewhat nonsensical. Now absl::Uniform more consistently returns the low input rather than any adjusted input. In the above case, that means that 1 is returned rather than 2. NOTE: Calls to absl::Uniform where the resolved upper bound is < the lower bound are still ill-formed and should be avoided. 3/ Adding better tests. The underlying uniform_*_distribution classes are not affected. PiperOrigin-RevId: 324240873 GitOrigin-RevId: 790f9061df340cd900e8da70e66c363f7af3c2eb Change-Id: I2a2208650ea3135c575e200b868ce1d275069fc8	5 years ago
Abseil Team	33caf1097e	Export of internal Abseil changes -- 7d0468a6610ed85586d5c87fd65de8dac5118923 by Derek Mauro <dmauro@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 313226473 -- 1131ef6d116f5ce7d46537a82f300ea06dcaaa53 by Gennadiy Rozental <rogeeff@google.com>: Migrate internal interface to use mutable references. PiperOrigin-RevId: 312931131 -- 96225212a9f5fbd0b38c71fe65539164992c7c3b by Laramie Leavitt <lar@google.com>: Remove random/internal/distributions.h This file was something of an historical artifact. All of the related code has either been removed or migraged, and so the only remaining type belongs with uniform_helper.h, as it is used to infer the return type of the absl::Uniform method in a few cases. PiperOrigin-RevId: 312878173 -- 6dcbd5be58ad425e08740ff64088373ee7fe4a72 by Mark Barolak <mbar@google.com>: Release the StrFormat test case for Cords to open source. PiperOrigin-RevId: 312707974 -- 34484d18dfb63a0a7ad6e2aaeb570e33592968be by Abseil Team <absl-team@google.com>: Let Cord::Cord(string&&), Cord::operator=(string&&), Cord::Append(string&&), and Cord::Prepend(string&&) steal string data and embed it into the Cord as a single external chunk, instead of copying it into flat chunks (at most 4083-byte each). Stealing string data is faster, but it creates a long chunk, which leads to a higher more memory usage if its subcords are created and outlive the whole Cord. These functions revert to copying the data if any of the following conditions holds: - string size is at most kMaxBytesToCopy (511), to avoid the overhead of an external chunk for short strings; - less than half of string capacity is used, to avoid pinning to much unused memory. PiperOrigin-RevId: 312683785 GitOrigin-RevId: 7d0468a6610ed85586d5c87fd65de8dac5118923 Change-Id: If79b5a1dfe6d53a8ddddbc7da84338f11fc4cfa3	5 years ago
Abseil Team	768eb2ca28	Export of internal Abseil changes -- f012012ef78234a6a4585321b67d7b7c92ebc266 by Laramie Leavitt <lar@google.com>: Slight restructuring of absl/random/internal randen implementation. Convert round-keys.inc into randen_round_keys.cc file. Consistently use a 128-bit pointer type for internal method parameters. This allows simpler pointer arithmetic in C++ & permits removal of some constants and casts. Remove some redundancy in comments & constexpr variables. Specifically, all references to Randen algorithm parameters use RandenTraits; duplication in RandenSlow removed. PiperOrigin-RevId: 312190313 -- dc8b42e054046741e9ed65335bfdface997c6063 by Abseil Team <absl-team@google.com>: Internal change. PiperOrigin-RevId: 312167304 -- f13d248fafaf206492c1362c3574031aea3abaf7 by Matthew Brown <matthewbr@google.com>: Cleanup StrFormat extensions a little. PiperOrigin-RevId: 312166336 -- 9d9117589667afe2332bb7ad42bc967ca7c54502 by Derek Mauro <dmauro@google.com>: Internal change PiperOrigin-RevId: 312105213 -- 9a12b9b3aa0e59b8ee6cf9408ed0029045543a9b by Abseil Team <absl-team@google.com>: Complete IGNORE_TYPE macro renaming. PiperOrigin-RevId: 311999699 -- 64756f20d61021d999bd0d4c15e9ad3857382f57 by Gennadiy Rozental <rogeeff@google.com>: Switch to fixed bytes specific default value. This fixes the Abseil Flags for big endian platforms. PiperOrigin-RevId: 311844448 -- bdbe6b5b29791dbc3816ada1828458b3010ff1e9 by Laramie Leavitt <lar@google.com>: Change many distribution tests to use pcg_engine as a deterministic source of entropy. It's reasonable to test that the BitGen itself has good entropy, however when testing the cross product of all random distributions x all the architecture variations x all submitted changes results in a large number of tests. In order to account for these failures while still using good entropy requires that our allowed sigma need to account for all of these independent tests. Our current sigma values are too restrictive, and we see a lot of failures, so we have to either relax the sigma values or convert some of the statistical tests to use deterministic values. This changelist does the latter. PiperOrigin-RevId: 311840096 GitOrigin-RevId: f012012ef78234a6a4585321b67d7b7c92ebc266 Change-Id: Ic84886f38ff30d7d72c126e9b63c9a61eb729a1a	5 years ago

Author

SHA1

Message

Date

Abseil Team

1995c6a3c2

Export of internal Abseil changes

--
790f9061df340cd900e8da70e66c363f7af3c2eb by Abseil Team <absl-team@google.com>:

Add support for rvalue reference to function types.

PiperOrigin-RevId: 324508531

--
51fe201dbb41a3ebc3d49ff65250b5f464279d43 by Abseil Team <absl-team@google.com>:

Cleaning up function comment style; no substantive change.

PiperOrigin-RevId: 324497401

--
da8595d5266577d0c170528d12f6de17b8affcc2 by Abseil Team <absl-team@google.com>:

Add support for demangling GNU vector types.

PiperOrigin-RevId: 324494559

--
0cb0acf88c1750f6963c9cb85249f9b4f0bd5104 by Abseil Team <absl-team@google.com>:

Add support for thread-local types.

PiperOrigin-RevId: 324491183

--
c676bc8380560599cd26f7f231e04e6be532e904 by Abseil Team <absl-team@google.com>:

Add support for demangling "Du" (char8_t).

PiperOrigin-RevId: 324441607

--
b218bf6467bc62b327214782c881e8224ad91509 by Abseil Team <absl-team@google.com>:

Update doc comments in header of `any.h` to reflect that `absl::variant` has been released.

PiperOrigin-RevId: 324431690

--
e5b579f3f1aa598c1f62e71dba7103b98811de59 by Laramie Leavitt <lar@google.com>:

Bugfix: Fix bounds in absl::Uniform where one of the bounds is min/max.

When absl::Uniform(rng, tag, a, b) is called, the tag is used in conjunction with the type to determine whether or not to manipulate the bounds to make them inclusive or exclusive through the uniform_*_bound functions. Unfortunately, at limits of the interval the function was not well behaved.

The previous implementation used wrapping arithmetic. This causes incorrect bounds computation at the extremes (numeric_limits::min / numeric_limits::max) the bound would wrap.

Improve this situation by:

1/ Changing the uniform_*_bound functions to use saturating arithmetic instead of wrapping, thus in the unsigned case, the upper_bound of IntervalOpenOpen for 0 is now 0, rather than numeric_limits::max, likewise for the lower bound.

2/ Adjusting the hi/lo checks in the distributions. When the interval is empty, such as for absl::Uniform(absl::IntervalOpenOpen, gen, 1, 0), the return value is somewhat nonsensical. Now absl::Uniform more consistently returns the low input rather than any adjusted input. In the above case, that means that 1 is returned rather than 2.

NOTE: Calls to absl::Uniform where the resolved upper bound is < the lower bound  are still ill-formed and should be avoided.

3/ Adding better tests.

The underlying uniform_*_distribution classes are not affected.

PiperOrigin-RevId: 324240873
GitOrigin-RevId: 790f9061df340cd900e8da70e66c363f7af3c2eb
Change-Id: I2a2208650ea3135c575e200b868ce1d275069fc8

5 years ago

Abseil Team

33caf1097e

Export of internal Abseil changes

--
7d0468a6610ed85586d5c87fd65de8dac5118923 by Derek Mauro <dmauro@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 313226473

--
1131ef6d116f5ce7d46537a82f300ea06dcaaa53 by Gennadiy Rozental <rogeeff@google.com>:

Migrate internal interface to use mutable references.

PiperOrigin-RevId: 312931131

--
96225212a9f5fbd0b38c71fe65539164992c7c3b by Laramie Leavitt <lar@google.com>:

Remove random/internal/distributions.h

This file was something of an historical artifact. All of the related
code has either been removed or migraged, and so the only remaining type
belongs with uniform_helper.h, as it is used to infer the return type
of the absl::Uniform method in a few cases.

PiperOrigin-RevId: 312878173

--
6dcbd5be58ad425e08740ff64088373ee7fe4a72 by Mark Barolak <mbar@google.com>:

Release the StrFormat test case for Cords to open source.

PiperOrigin-RevId: 312707974

--
34484d18dfb63a0a7ad6e2aaeb570e33592968be by Abseil Team <absl-team@google.com>:

Let Cord::Cord(string&&), Cord::operator=(string&&),
Cord::Append(string&&), and Cord::Prepend(string&&) steal string data
and embed it into the Cord as a single external chunk, instead of
copying it into flat chunks (at most 4083-byte each).

Stealing string data is faster, but it creates a long chunk, which leads
to a higher more memory usage if its subcords are created and outlive
the whole Cord.

These functions revert to copying the data if any of the following
conditions holds:
- string size is at most kMaxBytesToCopy (511), to avoid the overhead
  of an external chunk for short strings;
- less than half of string capacity is used, to avoid pinning to much
  unused memory.

PiperOrigin-RevId: 312683785
GitOrigin-RevId: 7d0468a6610ed85586d5c87fd65de8dac5118923
Change-Id: If79b5a1dfe6d53a8ddddbc7da84338f11fc4cfa3

5 years ago

Abseil Team

768eb2ca28

Export of internal Abseil changes

--
f012012ef78234a6a4585321b67d7b7c92ebc266 by Laramie Leavitt <lar@google.com>:

Slight restructuring of absl/random/internal randen implementation.

Convert round-keys.inc into randen_round_keys.cc file.

Consistently use a 128-bit pointer type for internal method parameters. This allows simpler pointer arithmetic in C++ & permits removal of some constants and casts.

Remove some redundancy in comments & constexpr variables. Specifically, all references to Randen algorithm parameters use RandenTraits; duplication in RandenSlow removed.

PiperOrigin-RevId: 312190313

--
dc8b42e054046741e9ed65335bfdface997c6063 by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 312167304

--
f13d248fafaf206492c1362c3574031aea3abaf7 by Matthew Brown <matthewbr@google.com>:

Cleanup StrFormat extensions a little.

PiperOrigin-RevId: 312166336

--
9d9117589667afe2332bb7ad42bc967ca7c54502 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 312105213

--
9a12b9b3aa0e59b8ee6cf9408ed0029045543a9b by Abseil Team <absl-team@google.com>:

Complete IGNORE_TYPE macro renaming.

PiperOrigin-RevId: 311999699

--
64756f20d61021d999bd0d4c15e9ad3857382f57 by Gennadiy Rozental <rogeeff@google.com>:

Switch to fixed bytes specific default value.

This fixes the Abseil Flags for big endian platforms.

PiperOrigin-RevId: 311844448

--
bdbe6b5b29791dbc3816ada1828458b3010ff1e9 by Laramie Leavitt <lar@google.com>:

Change many distribution tests to use pcg_engine as a deterministic source of entropy.

It's reasonable to test that the BitGen itself has good entropy, however when testing the cross product of all random distributions x all the architecture variations x all submitted changes results in a large number of tests. In order to account for these failures while still using good entropy requires that our allowed sigma need to account for all of these independent tests.

Our current sigma values are too restrictive, and we see a lot of failures, so we have to either relax the sigma values or convert some of the statistical tests to use deterministic values.

This changelist does the latter.

PiperOrigin-RevId: 311840096
GitOrigin-RevId: f012012ef78234a6a4585321b67d7b7c92ebc266
Change-Id: Ic84886f38ff30d7d72c126e9b63c9a61eb729a1a

5 years ago

3 Commits (4b915e70929ca2d6152240facc83d3d38c5d5f28)