summaryrefslogtreecommitdiffhomepage
path: root/pkg/amutex
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/amutex')
-rw-r--r--pkg/amutex/BUILD18
-rwxr-xr-xpkg/amutex/amutex_state_autogen.go3
-rw-r--r--pkg/amutex/amutex_test.go98
3 files changed, 3 insertions, 116 deletions
diff --git a/pkg/amutex/BUILD b/pkg/amutex/BUILD
deleted file mode 100644
index ffc918846..000000000
--- a/pkg/amutex/BUILD
+++ /dev/null
@@ -1,18 +0,0 @@
-load("//tools:defs.bzl", "go_library", "go_test")
-
-package(licenses = ["notice"])
-
-go_library(
- name = "amutex",
- srcs = ["amutex.go"],
- visibility = ["//:sandbox"],
- deps = ["//pkg/syserror"],
-)
-
-go_test(
- name = "amutex_test",
- size = "small",
- srcs = ["amutex_test.go"],
- library = ":amutex",
- deps = ["//pkg/sync"],
-)
diff --git a/pkg/amutex/amutex_state_autogen.go b/pkg/amutex/amutex_state_autogen.go
new file mode 100755
index 000000000..5a09c71ed
--- /dev/null
+++ b/pkg/amutex/amutex_state_autogen.go
@@ -0,0 +1,3 @@
+// automatically generated by stateify.
+
+package amutex
diff --git a/pkg/amutex/amutex_test.go b/pkg/amutex/amutex_test.go
deleted file mode 100644
index 8a3952f2a..000000000
--- a/pkg/amutex/amutex_test.go
+++ /dev/null
@@ -1,98 +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 amutex
-
-import (
- "testing"
- "time"
-
- "gvisor.dev/gvisor/pkg/sync"
-)
-
-type sleeper struct {
- ch chan struct{}
-}
-
-func (s *sleeper) SleepStart() <-chan struct{} {
- return s.ch
-}
-
-func (*sleeper) SleepFinish(bool) {
-}
-
-func (s *sleeper) Interrupted() bool {
- return len(s.ch) != 0
-}
-
-func TestMutualExclusion(t *testing.T) {
- var m AbortableMutex
- m.Init()
-
- // Test mutual exclusion by running "gr" goroutines concurrently, and
- // have each one increment a counter "iters" times within the critical
- // section established by the mutex.
- //
- // If at the end of the counter is not gr * iters, then we know that
- // goroutines ran concurrently within the critical section.
- //
- // If one of the goroutines doesn't complete, it's likely a bug that
- // causes it to wait forever.
- const gr = 1000
- const iters = 100000
- v := 0
- var wg sync.WaitGroup
- for i := 0; i < gr; i++ {
- wg.Add(1)
- go func() {
- for j := 0; j < iters; j++ {
- m.Lock(nil)
- v++
- m.Unlock()
- }
- wg.Done()
- }()
- }
-
- wg.Wait()
-
- if v != gr*iters {
- t.Fatalf("Bad count: got %v, want %v", v, gr*iters)
- }
-}
-
-func TestAbortWait(t *testing.T) {
- var s sleeper
- var m AbortableMutex
- m.Init()
-
- // Lock the mutex.
- m.Lock(&s)
-
- // Lock again, but this time cancel after 500ms.
- s.ch = make(chan struct{}, 1)
- go func() {
- time.Sleep(500 * time.Millisecond)
- s.ch <- struct{}{}
- }()
- if v := m.Lock(&s); v {
- t.Fatalf("Lock succeeded when it should have failed")
- }
-
- // Lock again, but cancel right away.
- s.ch <- struct{}{}
- if v := m.Lock(&s); v {
- t.Fatalf("Lock succeeded when it should have failed")
- }
-}