3 files changed, 0 insertions, 227 deletions
diff --git a/pkg/sync/seqatomic/BUILD b/pkg/sync/seqatomic/BUILD
deleted file mode 100644
index 60f79ab54..000000000
--- a/pkg/sync/seqatomic/BUILD
+++ /dev/null
@@ -1,45 +0,0 @@
-load("//tools:defs.bzl", "go_library", "go_test")
-load("//tools/go_generics:defs.bzl", "go_template", "go_template_instance")
-
-package(licenses = ["notice"])
-
-go_template(
-    name = "generic_seqatomic",
-    srcs = ["generic_seqatomic_unsafe.go"],
-    types = [
-        "Value",
-    ],
-    visibility = ["//:sandbox"],
-    deps = [
-        ":sync",
-        "//pkg/gohacks",
-    ],
-)
-
-go_template_instance(
-    name = "seqatomic_int",
-    out = "seqatomic_int_unsafe.go",
-    package = "seqatomic",
-    suffix = "Int",
-    template = ":generic_seqatomic",
-    types = {
-        "Value": "int",
-    },
-)
-
-go_library(
-    name = "seqatomic",
-    srcs = ["seqatomic_int_unsafe.go"],
-    deps = [
-        "//pkg/gohacks",
-        "//pkg/sync",
-    ],
-)
-
-go_test(
-    name = "seqatomic_test",
-    size = "small",
-    srcs = ["seqatomic_test.go"],
-    library = ":seqatomic",
-    deps = ["//pkg/sync"],
-)
diff --git a/pkg/sync/seqatomic/generic_seqatomic_unsafe.go b/pkg/sync/seqatomic/generic_seqatomic_unsafe.go
deleted file mode 100644
index 9578c9c52..000000000
--- a/pkg/sync/seqatomic/generic_seqatomic_unsafe.go
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package seqatomic doesn't exist. This file must be instantiated using the
-// go_template_instance rule in tools/go_generics/defs.bzl.
-package seqatomic
-
-import (
-	"unsafe"
-
-	"gvisor.dev/gvisor/pkg/gohacks"
-	"gvisor.dev/gvisor/pkg/sync"
-)
-
-// Value is a required type parameter.
-type Value struct{}
-
-// SeqAtomicLoad returns a copy of *ptr, ensuring that the read does not race
-// with any writer critical sections in seq.
-//
-//go:nosplit
-func SeqAtomicLoad(seq *sync.SeqCount, ptr *Value) Value {
-	for {
-		if val, ok := SeqAtomicTryLoad(seq, seq.BeginRead(), ptr); ok {
-			return val
-		}
-	}
-}
-
-// SeqAtomicTryLoad returns a copy of *ptr while in a reader critical section
-// in seq initiated by a call to seq.BeginRead() that returned epoch. If the
-// read would race with a writer critical section, SeqAtomicTryLoad returns
-// (unspecified, false).
-//
-//go:nosplit
-func SeqAtomicTryLoad(seq *sync.SeqCount, epoch sync.SeqCountEpoch, ptr *Value) (val Value, ok bool) {
-	if sync.RaceEnabled {
-		// runtime.RaceDisable() doesn't actually stop the race detector, so it
-		// can't help us here. Instead, call runtime.memmove directly, which is
-		// not instrumented by the race detector.
-		gohacks.Memmove(unsafe.Pointer(&val), unsafe.Pointer(ptr), unsafe.Sizeof(val))
-	} else {
-		// This is ~40% faster for short reads than going through memmove.
-		val = *ptr
-	}
-	ok = seq.ReadOk(epoch)
-	return
-}
diff --git a/pkg/sync/seqatomic/seqatomic_test.go b/pkg/sync/seqatomic/seqatomic_test.go
deleted file mode 100644
index 2c4568b07..000000000
--- a/pkg/sync/seqatomic/seqatomic_test.go
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// 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 seqatomic
-
-import (
-	"sync/atomic"
-	"testing"
-	"time"
-
-	"gvisor.dev/gvisor/pkg/sync"
-)
-
-func TestSeqAtomicLoadUncontended(t *testing.T) {
-	var seq sync.SeqCount
-	const want = 1
-	data := want
-	if got := SeqAtomicLoadInt(&seq, &data); got != want {
-		t.Errorf("SeqAtomicLoadInt: got %v, wanted %v", got, want)
-	}
-}
-
-func TestSeqAtomicLoadAfterWrite(t *testing.T) {
-	var seq sync.SeqCount
-	var data int
-	const want = 1
-	seq.BeginWrite()
-	data = want
-	seq.EndWrite()
-	if got := SeqAtomicLoadInt(&seq, &data); got != want {
-		t.Errorf("SeqAtomicLoadInt: got %v, wanted %v", got, want)
-	}
-}
-
-func TestSeqAtomicLoadDuringWrite(t *testing.T) {
-	var seq sync.SeqCount
-	var data int
-	const want = 1
-	seq.BeginWrite()
-	go func() {
-		time.Sleep(time.Second)
-		data = want
-		seq.EndWrite()
-	}()
-	if got := SeqAtomicLoadInt(&seq, &data); got != want {
-		t.Errorf("SeqAtomicLoadInt: got %v, wanted %v", got, want)
-	}
-}
-
-func TestSeqAtomicTryLoadUncontended(t *testing.T) {
-	var seq sync.SeqCount
-	const want = 1
-	data := want
-	epoch := seq.BeginRead()
-	if got, ok := SeqAtomicTryLoadInt(&seq, epoch, &data); !ok || got != want {
-		t.Errorf("SeqAtomicTryLoadInt: got (%v, %v), wanted (%v, true)", got, ok, want)
-	}
-}
-
-func TestSeqAtomicTryLoadDuringWrite(t *testing.T) {
-	var seq sync.SeqCount
-	var data int
-	epoch := seq.BeginRead()
-	seq.BeginWrite()
-	if got, ok := SeqAtomicTryLoadInt(&seq, epoch, &data); ok {
-		t.Errorf("SeqAtomicTryLoadInt: got (%v, true), wanted (_, false)", got)
-	}
-	seq.EndWrite()
-}
-
-func TestSeqAtomicTryLoadAfterWrite(t *testing.T) {
-	var seq sync.SeqCount
-	var data int
-	epoch := seq.BeginRead()
-	seq.BeginWrite()
-	seq.EndWrite()
-	if got, ok := SeqAtomicTryLoadInt(&seq, epoch, &data); ok {
-		t.Errorf("SeqAtomicTryLoadInt: got (%v, true), wanted (_, false)", got)
-	}
-}
-
-func BenchmarkSeqAtomicLoadIntUncontended(b *testing.B) {
-	var seq sync.SeqCount
-	const want = 42
-	data := want
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if got := SeqAtomicLoadInt(&seq, &data); got != want {
-				b.Fatalf("SeqAtomicLoadInt: got %v, wanted %v", got, want)
-			}
-		}
-	})
-}
-
-func BenchmarkSeqAtomicTryLoadIntUncontended(b *testing.B) {
-	var seq sync.SeqCount
-	const want = 42
-	data := want
-	b.RunParallel(func(pb *testing.PB) {
-		epoch := seq.BeginRead()
-		for pb.Next() {
-			if got, ok := SeqAtomicTryLoadInt(&seq, epoch, &data); !ok || got != want {
-				b.Fatalf("SeqAtomicTryLoadInt: got (%v, %v), wanted (%v, true)", got, ok, want)
-			}
-		}
-	})
-}
-
-// For comparison:
-func BenchmarkAtomicValueLoadIntUncontended(b *testing.B) {
-	var a atomic.Value
-	const want = 42
-	a.Store(int(want))
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if got := a.Load().(int); got != want {
-				b.Fatalf("atomic.Value.Load: got %v, wanted %v", got, want)
-			}
-		}
-	})
-}