1 // +build !linux appengine
5 * Copyright 2018 gRPC authors.
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
27 "google.golang.org/grpc/grpclog"
31 grpclog.Info("CPU time info is unavailable on non-linux or appengine environment.")
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 {
40 // Rusage is an empty struct under non-linux or appengine environment.
43 // GetRusage is a no-op function under non-linux or appengine environment.
44 func GetRusage() (rusage *Rusage) {
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) {
54 // SetTCPUserTimeout is a no-op function under non-linux or appengine environments
55 func SetTCPUserTimeout(conn net.Conn, timeout time.Duration) error {
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) {