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Diffstat (limited to 'vendor/go.uber.org/atomic/float64_ext.go')
-rw-r--r-- | vendor/go.uber.org/atomic/float64_ext.go | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/vendor/go.uber.org/atomic/float64_ext.go b/vendor/go.uber.org/atomic/float64_ext.go deleted file mode 100644 index df36b010..00000000 --- a/vendor/go.uber.org/atomic/float64_ext.go +++ /dev/null @@ -1,69 +0,0 @@ -// Copyright (c) 2020 Uber Technologies, Inc. -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -// THE SOFTWARE. - -package atomic - -import ( - "math" - "strconv" -) - -//go:generate bin/gen-atomicwrapper -name=Float64 -type=float64 -wrapped=Uint64 -pack=math.Float64bits -unpack=math.Float64frombits -swap -json -imports math -file=float64.go - -// Add atomically adds to the wrapped float64 and returns the new value. -func (f *Float64) Add(delta float64) float64 { - for { - old := f.Load() - new := old + delta - if f.CAS(old, new) { - return new - } - } -} - -// Sub atomically subtracts from the wrapped float64 and returns the new value. -func (f *Float64) Sub(delta float64) float64 { - return f.Add(-delta) -} - -// CAS is an atomic compare-and-swap for float64 values. -// -// Note: CAS handles NaN incorrectly. NaN != NaN using Go's inbuilt operators -// but CAS allows a stored NaN to compare equal to a passed in NaN. -// This avoids typical CAS loops from blocking forever, e.g., -// -// for { -// old := atom.Load() -// new = f(old) -// if atom.CAS(old, new) { -// break -// } -// } -// -// If CAS did not match NaN to match, then the above would loop forever. -func (f *Float64) CAS(old, new float64) (swapped bool) { - return f.v.CAS(math.Float64bits(old), math.Float64bits(new)) -} - -// String encodes the wrapped value as a string. -func (f *Float64) String() string { - // 'g' is the behavior for floats with %v. - return strconv.FormatFloat(f.Load(), 'g', -1, 64) -} |