mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
// Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package nvml
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import (
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"unsafe"
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)
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import "C"
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var cgoAllocsUnknown = new(struct{})
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type stringHeader struct {
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Data unsafe.Pointer
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Len int
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}
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func clen(n []byte) int {
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for i := 0; i < len(n); i++ {
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if n[i] == 0 {
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return i
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}
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}
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return len(n)
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}
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func uint32SliceToIntSlice(s []uint32) []int {
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ret := make([]int, len(s))
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for i := range s {
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ret[i] = int(s[i])
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}
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return ret
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}
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// packPCharString creates a Go string backed by *C.char and avoids copying.
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func packPCharString(p *C.char) (raw string) {
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if p != nil && *p != 0 {
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h := (*stringHeader)(unsafe.Pointer(&raw))
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h.Data = unsafe.Pointer(p)
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for *p != 0 {
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p = (*C.char)(unsafe.Pointer(uintptr(unsafe.Pointer(p)) + 1)) // p++
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}
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h.Len = int(uintptr(unsafe.Pointer(p)) - uintptr(h.Data))
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}
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return
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}
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// unpackPCharString represents the data from Go string as *C.char and avoids copying.
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func unpackPCharString(str string) (*C.char, *struct{}) {
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h := (*stringHeader)(unsafe.Pointer(&str))
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return (*C.char)(h.Data), cgoAllocsUnknown
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}
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