Commit Graph

13 Commits

Author SHA1 Message Date
Avi Kivity
fcb8d040e8 treewide: use Software Package Data Exchange (SPDX) license identifiers
Instead of lengthy blurbs, switch to single-line, machine-readable
standardized (https://spdx.dev) license identifiers. The Linux kernel
switched long ago, so there is strong precedent.

Three cases are handled: AGPL-only, Apache-only, and dual licensed.
For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0),
reasoning that our changes are extensive enough to apply our license.

The changes we applied mechanically with a script, except to
licenses/README.md.

Closes #9937
2022-01-18 12:15:18 +01:00
Pavel Emelyanov
63a2fed585 hasher: More picky noexcept marking of feed_hash()
Commit 5adb8e555c marked the ::feed_hash() and a visitor lambda of
digester::feed_hash() as noexcept. This was quite recklesl as the
appending_hash<>::operator()s called by ::feed_hash() are not all
marked noexcept. In particular, the appending_hash<row>() is not
such and seem to throw.

The original intent of the mentioned commit was to facilitate the
partition_hasher in repair/ code. The hasher itself had been removed
by the 0af7a22c21, so it no longer needs the feed_hash-s to be
noexcepts.

The fix is to inherit noexcept from the called hashers, but for the
digester::feed_hash part the noexcept is just removed until clang
compilation bug #50994 is fixed.

fixes: #8983
tests: unit(dev)

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
Message-Id: <20210706153608.4299-1-xemul@scylladb.com>
2021-07-07 12:00:16 +03:00
Avi Kivity
a55b434a2b treewide: extent copyright statements to present day 2021-06-06 19:18:49 +03:00
Avi Kivity
1afd6fbe06 hashing: appending_hash: convert from enable_if to concepts
A little simpler to understand.

Closes #8288
2021-03-17 09:59:22 +02:00
Pavel Emelyanov
5adb8e555c hashers: Mark hash updates noexcept
All those methods end up with library calls, whose code
is not marked noexcept, but is such according to code
itself or docs.

The primary goal is to make some repair partition_hasher
methods noexcept (next patch).

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2020-09-07 23:17:41 +03:00
Avi Kivity
a4c44cab88 treewide: update concepts language from the Concepts TS to C++20
Seastar recently lost support for the experimental Concepts Technical
Specification (TS) and gained support for C++20 concepts. Re-enable
concepts in Scylla by updating our use of concepts to the C++20
standard.

This change:
 - peels off uses of the GCC6_CONCEPT macro
 - removes inclusions of <seastar/gcc6-concepts.hh>
 - replaces function-style concepts (no longer supported) with
   equation-style concepts
 - semicolons added and removed as needed
 - deprecated std::is_pod replaced by recommended replacement
 - updates return type constraints to use concepts instead of
   type names (either std::same_as or std::convertible_to, with
   std::same_as chosen when possible)

No attempt is made to improve the concepts; this is a specification
update only.
Message-Id: <20200531110254.2555854-1-avi@scylladb.com>
2020-06-02 09:12:21 +03:00
Avi Kivity
adb64dc72f treewide: tighten concepts syntax
gcc 10 requires a semicolon after every compound requirement,
as per the standard. Add missing semicolons where necessary.
Message-Id: <20200129205805.20928-1-avi@scylladb.com>
2020-01-30 14:10:18 +02:00
Tomasz Grabiec
b0eecdcb8f hashing: Introduce type-erased interface for the hasher
The motivation is to allow hiding the definition of functions
accepting a hasher. For one, this reduces (re)complication times,
because we can put the definition in .cc
2019-05-14 10:43:06 +02:00
Tomasz Grabiec
fd349a3c65 hashing: Introduce C++ concept for the hasher 2019-05-10 12:54:30 +02:00
Duarte Nunes
fa2b0384d2 Replace std::experimental types with C++17 std version.
Replace stdx::optional and stdx::string_view with the C++ std
counterparts.

Some instances of boost::variant were also replaced with std::variant,
namely those that called seastar::visit.

Scylla now requires GCC 8 to compile.

Signed-off-by: Duarte Nunes <duarte@scylladb.com>
Message-Id: <20190108111141.5369-1-duarte@scylladb.com>
2019-01-08 13:16:36 +02:00
Avi Kivity
ebaeefa02b Merge seatar upstream (seastar namespace)
- introcduced "seastarx.hh" header, which does a "using namespace seastar";
 - 'net' namespace conflicts with seastar::net, renamed to 'netw'.
 - 'transport' namespace conflicts with seastar::transport, renamed to
   cql_transport.
 - "logger" global variables now conflict with logger global type, renamed
   to xlogger.
 - other minor changes
2017-05-21 12:26:15 +03:00
Paweł Dziepak
25c8ed1c71 feed_hash: allow additional arguments 2017-02-02 10:35:14 +00:00
Tomasz Grabiec
eb1b21eb4b Introduce hashing helpers 2016-01-08 21:10:25 +01:00