Move fdnotifier package to reduce internal confusion.

PiperOrigin-RevId: 225632398
Change-Id: I909e7e2925aa369adc28e844c284d9a6108e85ce

1 files changed, 0 insertions, 74 deletions

diff --git a/pkg/waiter/fdnotifier/poll_unsafe.go b/pkg/waiter/fdnotifier/poll_unsafe.go
deleted file mode 100644
index 8459d4c74..000000000
--- a/pkg/waiter/fdnotifier/poll_unsafe.go
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2018 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package fdnotifier
-
-import (
-	"syscall"
-	"unsafe"
-
-	"gvisor.googlesource.com/gvisor/pkg/waiter"
-)
-
-// NonBlockingPoll polls the given FD in non-blocking fashion. It is used just
-// to query the FD's current state.
-func NonBlockingPoll(fd int32, mask waiter.EventMask) waiter.EventMask {
-	e := struct {
-		fd      int32
-		events  int16
-		revents int16
-	}{
-		fd:     fd,
-		events: int16(mask),
-	}
-
-	for {
-		n, _, err := syscall.RawSyscall(syscall.SYS_POLL, uintptr(unsafe.Pointer(&e)), 1, 0)
-		// Interrupted by signal, try again.
-		if err == syscall.EINTR {
-			continue
-		}
-		// If an error occur we'll conservatively say the FD is ready for
-		// whatever is being checked.
-		if err != 0 {
-			return mask
-		}
-
-		// If no FDs were returned, it wasn't ready for anything.
-		if n == 0 {
-			return 0
-		}
-
-		// Otherwise we got the ready events in the revents field.
-		return waiter.EventMask(e.revents)
-	}
-}
-
-// epollWait performs a blocking wait on epfd.
-//
-// Preconditions:
-//  * len(events) > 0
-func epollWait(epfd int, events []syscall.EpollEvent, msec int) (int, error) {
-	if len(events) == 0 {
-		panic("Empty events passed to EpollWait")
-	}
-
-	// We actually use epoll_pwait with NULL sigmask instead of epoll_wait
-	// since that is what the Go >= 1.11 runtime prefers.
-	r, _, e := syscall.Syscall6(syscall.SYS_EPOLL_PWAIT, uintptr(epfd), uintptr(unsafe.Pointer(&events[0])), uintptr(len(events)), uintptr(msec), 0, 0)
-	if e != 0 {
-		return 0, e
-	}
-	return int(r), nil
-}