1 files changed, 57 insertions, 0 deletions
diff --git a/src/sync/export_test.go b/src/sync/export_test.go
new file mode 100644
index 0000000..c020ef7
--- /dev/null
+++ b/src/sync/export_test.go
@@ -0,0 +1,57 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package sync
+
+// Export for testing.
+var Runtime_Semacquire = runtime_Semacquire
+var Runtime_Semrelease = runtime_Semrelease
+var Runtime_procPin = runtime_procPin
+var Runtime_procUnpin = runtime_procUnpin
+
+// poolDequeue testing.
+type PoolDequeue interface {
+	PushHead(val any) bool
+	PopHead() (any, bool)
+	PopTail() (any, bool)
+}
+
+func NewPoolDequeue(n int) PoolDequeue {
+	d := &poolDequeue{
+		vals: make([]eface, n),
+	}
+	// For testing purposes, set the head and tail indexes close
+	// to wrapping around.
+	d.headTail = d.pack(1<<dequeueBits-500, 1<<dequeueBits-500)
+	return d
+}
+
+func (d *poolDequeue) PushHead(val any) bool {
+	return d.pushHead(val)
+}
+
+func (d *poolDequeue) PopHead() (any, bool) {
+	return d.popHead()
+}
+
+func (d *poolDequeue) PopTail() (any, bool) {
+	return d.popTail()
+}
+
+func NewPoolChain() PoolDequeue {
+	return new(poolChain)
+}
+
+func (c *poolChain) PushHead(val any) bool {
+	c.pushHead(val)
+	return true
+}
+
+func (c *poolChain) PopHead() (any, bool) {
+	return c.popHead()
+}
+
+func (c *poolChain) PopTail() (any, bool) {
+	return c.popTail()
+}