Files
scylladb/utils/large_bitset.cc
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

48 lines
1015 B
C++

/*
* Copyright (C) 2015-present ScyllaDB
*/
/*
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include "large_bitset.hh"
#include <algorithm>
#include <seastar/core/align.hh>
#include <seastar/core/thread.hh>
#include "seastarx.hh"
using namespace seastar;
large_bitset::large_bitset(size_t nr_bits) : _nr_bits(nr_bits) {
assert(thread::running_in_thread());
const size_t orig_nr_ints = align_up(nr_bits, bits_per_int()) / bits_per_int();
auto nr_ints = orig_nr_ints;
while (nr_ints) {
nr_ints = _storage.reserve_partial(nr_ints);
if (need_preempt()) {
thread::yield();
}
}
nr_ints = orig_nr_ints;
while (nr_ints) {
_storage.push_back(0);
--nr_ints;
if (need_preempt()) {
thread::yield();
}
}
}
void
large_bitset::clear() {
assert(thread::running_in_thread());
for (auto&& pos: _storage) {
pos = 0;
if (need_preempt()) {
thread::yield();
}
}
}