mirror of
https://github.com/superseriousbusiness/gotosocial.git
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81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
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//go:build windows
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package sysfs
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import (
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"net"
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"syscall"
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"unsafe"
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"github.com/tetratelabs/wazero/experimental/sys"
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"github.com/tetratelabs/wazero/internal/fsapi"
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socketapi "github.com/tetratelabs/wazero/internal/sock"
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)
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const (
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// MSG_PEEK is the flag PEEK for syscall.Recvfrom on Windows.
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// This constant is not exported on this platform.
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MSG_PEEK = 0x2
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// _FIONBIO is the flag to set the O_NONBLOCK flag on socket handles using ioctlsocket.
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_FIONBIO = 0x8004667e
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)
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var (
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// modws2_32 is WinSock.
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modws2_32 = syscall.NewLazyDLL("ws2_32.dll")
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// procrecvfrom exposes recvfrom from WinSock.
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procrecvfrom = modws2_32.NewProc("recvfrom")
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// procioctlsocket exposes ioctlsocket from WinSock.
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procioctlsocket = modws2_32.NewProc("ioctlsocket")
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)
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func newTCPListenerFile(tl *net.TCPListener) socketapi.TCPSock {
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return newDefaultTCPListenerFile(tl)
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}
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// recvfrom exposes the underlying syscall in Windows.
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//
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// Note: since we are only using this to expose MSG_PEEK,
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// we do not need really need all the parameters that are actually
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// allowed in WinSock.
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// We ignore `from *sockaddr` and `fromlen *int`.
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func recvfrom(s uintptr, buf []byte, flags int32) (n int, errno sys.Errno) {
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var _p0 *byte
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if len(buf) > 0 {
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_p0 = &buf[0]
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}
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r0, _, e1 := syscall.SyscallN(
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procrecvfrom.Addr(),
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s,
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uintptr(unsafe.Pointer(_p0)),
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uintptr(len(buf)),
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uintptr(flags),
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0, // from *sockaddr (optional)
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0) // fromlen *int (optional)
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return int(r0), sys.UnwrapOSError(e1)
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}
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func setNonblockSocket(fd uintptr, enabled bool) sys.Errno {
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opt := uint64(0)
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if enabled {
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opt = 1
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}
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// ioctlsocket(fd, FIONBIO, &opt)
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_, _, errno := syscall.SyscallN(
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procioctlsocket.Addr(),
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uintptr(fd),
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uintptr(_FIONBIO),
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uintptr(unsafe.Pointer(&opt)))
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return sys.UnwrapOSError(errno)
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}
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func _pollSock(conn syscall.Conn, flag fsapi.Pflag, timeoutMillis int32) (bool, sys.Errno) {
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if flag != fsapi.POLLIN {
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return false, sys.ENOTSUP
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}
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n, errno := syscallConnControl(conn, func(fd uintptr) (int, sys.Errno) {
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return _poll([]pollFd{newPollFd(fd, _POLLIN, 0)}, timeoutMillis)
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})
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return n > 0, errno
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}
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