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72 lines
2.3 KiB
72 lines
2.3 KiB
// @generated Code generated by gen-atomicwrapper. |
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// Copyright (c) 2020-2023 Uber Technologies, Inc. |
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// |
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// Permission is hereby granted, free of charge, to any person obtaining a copy |
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// of this software and associated documentation files (the "Software"), to deal |
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// in the Software without restriction, including without limitation the rights |
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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// copies of the Software, and to permit persons to whom the Software is |
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// furnished to do so, subject to the following conditions: |
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// |
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// The above copyright notice and this permission notice shall be included in |
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// all copies or substantial portions of the Software. |
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// |
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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// THE SOFTWARE. |
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package atomic |
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// Error is an atomic type-safe wrapper for error values. |
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type Error struct { |
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_ nocmp // disallow non-atomic comparison |
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v Value |
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} |
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var _zeroError error |
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// NewError creates a new Error. |
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func NewError(val error) *Error { |
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x := &Error{} |
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if val != _zeroError { |
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x.Store(val) |
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} |
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return x |
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} |
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// Load atomically loads the wrapped error. |
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func (x *Error) Load() error { |
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return unpackError(x.v.Load()) |
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} |
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// Store atomically stores the passed error. |
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func (x *Error) Store(val error) { |
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x.v.Store(packError(val)) |
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} |
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// CompareAndSwap is an atomic compare-and-swap for error values. |
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func (x *Error) CompareAndSwap(old, new error) (swapped bool) { |
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if x.v.CompareAndSwap(packError(old), packError(new)) { |
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return true |
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} |
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if old == _zeroError { |
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// If the old value is the empty value, then it's possible the |
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// underlying Value hasn't been set and is nil, so retry with nil. |
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return x.v.CompareAndSwap(nil, packError(new)) |
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} |
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return false |
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} |
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// Swap atomically stores the given error and returns the old |
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// value. |
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func (x *Error) Swap(val error) (old error) { |
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return unpackError(x.v.Swap(packError(val))) |
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}
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