mirror of
https://github.com/gravitational/teleport.git
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39 lines
1.2 KiB
Go
39 lines
1.2 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package utils
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import (
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"unsafe"
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"github.com/gravitational/trace"
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)
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// UnsafeSliceData is a wrapper around unsafe.SliceData
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// which ensures that instead of ever returning
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// "a non-nil pointer to an unspecified memory address"
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// (see unsafe.SliceData documentation), an error is
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// returned instead.
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func UnsafeSliceData[T any](slice []T) (*T, error) {
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if slice == nil || cap(slice) > 0 {
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return unsafe.SliceData(slice), nil
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}
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return nil, trace.BadParameter("non-nil slice had a capacity of zero")
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}
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