mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
// Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package nvml
|
|
|
|
import (
|
|
"unsafe"
|
|
)
|
|
|
|
import "C"
|
|
|
|
var cgoAllocsUnknown = new(struct{})
|
|
|
|
type stringHeader struct {
|
|
Data unsafe.Pointer
|
|
Len int
|
|
}
|
|
|
|
func clen(n []byte) int {
|
|
for i := 0; i < len(n); i++ {
|
|
if n[i] == 0 {
|
|
return i
|
|
}
|
|
}
|
|
return len(n)
|
|
}
|
|
|
|
func uint32SliceToIntSlice(s []uint32) []int {
|
|
ret := make([]int, len(s))
|
|
for i := range s {
|
|
ret[i] = int(s[i])
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// packPCharString creates a Go string backed by *C.char and avoids copying.
|
|
func packPCharString(p *C.char) (raw string) {
|
|
if p != nil && *p != 0 {
|
|
h := (*stringHeader)(unsafe.Pointer(&raw))
|
|
h.Data = unsafe.Pointer(p)
|
|
for *p != 0 {
|
|
p = (*C.char)(unsafe.Pointer(uintptr(unsafe.Pointer(p)) + 1)) // p++
|
|
}
|
|
h.Len = int(uintptr(unsafe.Pointer(p)) - uintptr(h.Data))
|
|
}
|
|
return
|
|
}
|
|
|
|
// unpackPCharString represents the data from Go string as *C.char and avoids copying.
|
|
func unpackPCharString(str string) (*C.char, *struct{}) {
|
|
h := (*stringHeader)(unsafe.Pointer(&str))
|
|
return (*C.char)(h.Data), cgoAllocsUnknown
|
|
}
|