github.com/FlowerWrong/netstack@v0.0.0-20191009141956-e5848263af28/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 darwin
    16  
    17  package rawfile
    18  
    19  import (
    20  	"syscall"
    21  	"unsafe"
    22  )
    23  
    24  // BlockingPoll is just a stub function that forwards to the ppoll() system call
    25  // on non-amd64 and non-arm64 platforms.
    26  func BlockingPoll(fds *PollEvent, nfds int, timeout *syscall.Timespec) (int, syscall.Errno) {
    27  	n, _, e := syscall.Syscall(syscall.SYS_POLL, uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(unsafe.Pointer(timeout)))
    28  
    29  	return int(n), e
    30  }