github.com/MerlinKodo/gvisor@v0.0.0-20231110090155-957f62ecf90e/pkg/hosttid/hosttid.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package hosttid provides the Current function.
    16  package hosttid
    17  
    18  import (
    19  	"runtime"
    20  )
    21  
    22  // Dummy references for facts.
    23  const _ = runtime.Compiler
    24  
    25  // Current returns the caller's host thread ID. Unless runtime.LockOSThread()
    26  // is in effect, this function is inherently racy since the Go runtime may
    27  // migrate the calling goroutine to another thread at any time.
    28  //
    29  // Current is equivalent to unix.Gettid(), but faster.
    30  func Current() uint64