github.com/lightlus/netstack@v1.2.0/tcpip/time_unsafe.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 // +build go1.9 16 // +build !go1.22 17 18 // Check go:linkname function signatures when updating Go version. 19 20 package tcpip 21 22 import ( 23 _ "time" // Used with go:linkname. 24 _ "unsafe" // Required for go:linkname. 25 ) 26 27 // StdClock implements Clock with the time package. 28 type StdClock struct{} 29 30 var _ Clock = (*StdClock)(nil) 31 32 //go:linkname now time.now 33 func now() (sec int64, nsec int32, mono int64) 34 35 // NowNanoseconds implements Clock.NowNanoseconds. 36 func (*StdClock) NowNanoseconds() int64 { 37 sec, nsec, _ := now() 38 return sec*1e9 + int64(nsec) 39 } 40 41 // NowMonotonic implements Clock.NowMonotonic. 42 func (*StdClock) NowMonotonic() int64 { 43 _, _, mono := now() 44 return mono 45 }