1// Copyright 2012 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package sync
6
7// Export for testing.
8var Runtime_Semacquire = runtime_Semacquire
9var Runtime_Semrelease = runtime_Semrelease
10var Runtime_procPin = runtime_procPin
11var Runtime_procUnpin = runtime_procUnpin
12
13// poolDequeue testing.
14type PoolDequeue interface {
15	PushHead(val any) bool
16	PopHead() (any, bool)
17	PopTail() (any, bool)
18}
19
20func NewPoolDequeue(n int) PoolDequeue {
21	d := &poolDequeue{
22		vals: make([]eface, n),
23	}
24	// For testing purposes, set the head and tail indexes close
25	// to wrapping around.
26	d.headTail = d.pack(1<<dequeueBits-500, 1<<dequeueBits-500)
27	return d
28}
29
30func (d *poolDequeue) PushHead(val any) bool {
31	return d.pushHead(val)
32}
33
34func (d *poolDequeue) PopHead() (any, bool) {
35	return d.popHead()
36}
37
38func (d *poolDequeue) PopTail() (any, bool) {
39	return d.popTail()
40}
41
42func NewPoolChain() PoolDequeue {
43	return new(poolChain)
44}
45
46func (c *poolChain) PushHead(val any) bool {
47	c.pushHead(val)
48	return true
49}
50
51func (c *poolChain) PopHead() (any, bool) {
52	return c.popHead()
53}
54
55func (c *poolChain) PopTail() (any, bool) {
56	return c.popTail()
57}
58