github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/session/mbtime/mbtime_linux.go (about) 1 /* 2 * Copyright (C) 2020 The "MysteriumNetwork/node" Authors. 3 * 4 * This program is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation, either version 3 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 package mbtime 19 20 import ( 21 "golang.org/x/sys/unix" 22 ) 23 24 func nanotime() (uint64, error) { 25 var ts unix.Timespec 26 if err := unix.ClockGettime(unix.CLOCK_BOOTTIME, &ts); err != nil { 27 if tempSyscallErr(err) { 28 if err := unix.ClockGettime(unix.CLOCK_BOOTTIME, &ts); err != nil { 29 return 0, err 30 } 31 } 32 } 33 34 // explicit cast prevents overflow on 32 bit systems 35 castedSec := uint64(ts.Sec) 36 castedNsec := uint64(ts.Nsec) 37 return castedSec*1e9 + castedNsec, nil 38 }