github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/tcpip/link/rawfile/blockingpoll_noyield_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 linux,!amd64,!arm64 16 17 package rawfile 18 19 import ( 20 "unsafe" 21 22 "golang.org/x/sys/unix" 23 ) 24 25 // BlockingPoll is just a stub function that forwards to the ppoll() system call 26 // on non-amd64 and non-arm64 platforms. 27 func BlockingPoll(fds *PollEvent, nfds int, timeout *unix.Timespec) (int, unix.Errno) { 28 n, _, e := unix.Syscall6(unix.SYS_PPOLL, uintptr(unsafe.Pointer(fds)), 29 uintptr(nfds), uintptr(unsafe.Pointer(timeout)), 0, 0, 0) 30 31 return int(n), e 32 }