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// Copyright 2018 Google LLC
//
// 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 pgalloc
import (
"reflect"
"syscall"
"unsafe"
)
func unsafeSlice(addr uintptr, length int) (slice []byte) {
sh := (*reflect.SliceHeader)(unsafe.Pointer(&slice))
sh.Data = addr
sh.Len = length
sh.Cap = length
return
}
func mincore(s []byte, buf []byte) error {
if _, _, errno := syscall.RawSyscall(
syscall.SYS_MINCORE,
uintptr(unsafe.Pointer(&s[0])),
uintptr(len(s)),
uintptr(unsafe.Pointer(&buf[0]))); errno != 0 {
return errno
}
return nil
}
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