mirror of
https://github.com/status-im/status-go.git
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a6df2be92e
Due to presence of syscall to `epoll_wait` android emulators after Android 10 would crash. This commit has added `amd64` fallback implementations in 2 spots - `tcp-shaker` ref :571aa46f35- `notify` ref :0eb36e6c1aThe build flags are updated for fallback implementation to only be used in case of `x86_64` simulators. status-mobile PR : https://github.com/status-im/status-mobile/pull/17773
119 lines
2.8 KiB
Go
119 lines
2.8 KiB
Go
//go:build linux && !(android && amd64)
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// +build linux
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// +build !android !amd64
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package tcp
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import (
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"fmt"
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"os"
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"time"
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"golang.org/x/sys/unix"
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)
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const maxEpollEvents = 32
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// createSocket creates a socket with necessary options set.
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func createSocketZeroLinger(zeroLinger bool) (fd int, err error) {
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// Create socket
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fd, err = _createNonBlockingSocket()
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if err == nil {
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if zeroLinger {
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err = _setZeroLinger(fd)
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}
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}
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return
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}
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// createNonBlockingSocket creates a non-blocking socket with necessary options all set.
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func _createNonBlockingSocket() (int, error) {
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// Create socket
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fd, err := _createSocket()
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if err != nil {
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return 0, err
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}
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// Set necessary options
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err = _setSockOpts(fd)
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if err != nil {
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unix.Close(fd)
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}
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return fd, err
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}
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// createSocket creates a socket with CloseOnExec set
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func _createSocket() (int, error) {
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fd, err := unix.Socket(unix.AF_INET, unix.SOCK_STREAM, 0)
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if err != nil {
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return 0, os.NewSyscallError("socket", err)
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}
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unix.CloseOnExec(fd)
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return fd, err
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}
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// setSockOpts sets SOCK_NONBLOCK and TCP_QUICKACK for given fd
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func _setSockOpts(fd int) error {
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err := unix.SetNonblock(fd, true)
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if err != nil {
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return err
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}
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return unix.SetsockoptInt(fd, unix.IPPROTO_TCP, unix.TCP_QUICKACK, 0)
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}
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var zeroLinger = unix.Linger{Onoff: 1, Linger: 0}
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// setLinger sets SO_Linger with 0 timeout to given fd
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func _setZeroLinger(fd int) error {
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return unix.SetsockoptLinger(fd, unix.SOL_SOCKET, unix.SO_LINGER, &zeroLinger)
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}
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func createPoller() (fd int, err error) {
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fd, err = unix.EpollCreate1(unix.EPOLL_CLOEXEC)
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if err != nil {
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err = os.NewSyscallError("epoll_create1", err)
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}
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return fd, err
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}
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// registerEvents registers given fd with read and write events.
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func registerEvents(pollerFd int, fd int) error {
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var event unix.EpollEvent
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event.Events = unix.EPOLLOUT | unix.EPOLLIN | unix.EPOLLET
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event.Fd = int32(fd)
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if err := unix.EpollCtl(pollerFd, unix.EPOLL_CTL_ADD, fd, &event); err != nil {
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return os.NewSyscallError(fmt.Sprintf("epoll_ctl(%d, ADD, %d, ...)", pollerFd, fd), err)
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}
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return nil
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}
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func pollEvents(pollerFd int, timeout time.Duration) ([]event, error) {
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var timeoutMS = int(timeout.Nanoseconds() / 1e6)
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var epollEvents [maxEpollEvents]unix.EpollEvent
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// this blocks, waiting for socket events
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nEvents, err := unix.EpollWait(pollerFd, epollEvents[:], timeoutMS)
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if err != nil {
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if err == unix.EINTR {
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return nil, nil
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}
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return nil, os.NewSyscallError("epoll_wait", err)
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}
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var events = make([]event, 0, nEvents)
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for i := 0; i < nEvents; i++ {
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var fd = int(epollEvents[i].Fd)
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var evt = event{Fd: fd, Err: nil}
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errCode, err := unix.GetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_ERROR)
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if err != nil {
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evt.Err = os.NewSyscallError("getsockopt", err)
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}
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if errCode != 0 {
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evt.Err = newErrConnect(errCode)
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}
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events = append(events, evt)
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}
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return events, nil
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}
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