vendor/google.golang.org/grpc/internal/syscall/syscall_nonlinux.go

   1 // +build !linux appengine
   2
   3 /*
   4  *
   5  * Copyright 2018 gRPC authors.
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  */
  20
  21 package syscall
  22
  23 import (
  24         "net"
  25         "time"
  26
  27         "google.golang.org/grpc/grpclog"
  28 )
  29
  30 func init() {
  31         grpclog.Info("CPU time info is unavailable on non-linux or appengine environment.")
  32 }
  33
  34 // GetCPUTime returns the how much CPU time has passed since the start of this process.
  35 // It always returns 0 under non-linux or appengine environment.
  36 func GetCPUTime() int64 {
  37         return 0
  38 }
  39
  40 // Rusage is an empty struct under non-linux or appengine environment.
  41 type Rusage struct{}
  42
  43 // GetRusage is a no-op function under non-linux or appengine environment.
  44 func GetRusage() (rusage *Rusage) {
  45         return nil
  46 }
  47
  48 // CPUTimeDiff returns the differences of user CPU time and system CPU time used
  49 // between two Rusage structs. It a no-op function for non-linux or appengine environment.
  50 func CPUTimeDiff(first *Rusage, latest *Rusage) (float64, float64) {
  51         return 0, 0
  52 }
  53
  54 // SetTCPUserTimeout is a no-op function under non-linux or appengine environments
  55 func SetTCPUserTimeout(conn net.Conn, timeout time.Duration) error {
  56         return nil
  57 }
  58
  59 // GetTCPUserTimeout is a no-op function under non-linux or appengine environments
  60 // a negative return value indicates the operation is not supported
  61 func GetTCPUserTimeout(conn net.Conn) (int, error) {
  62         return -1, nil
  63 }