71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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import "context"
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// ByteFIFO defines a FIFO that takes a byte array
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type ByteFIFO interface {
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// Len returns the length of the fifo
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Len(ctx context.Context) int64
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// PushFunc pushes data to the end of the fifo and calls the callback if it is added
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PushFunc(ctx context.Context, data []byte, fn func() error) error
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// Pop pops data from the start of the fifo
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Pop(ctx context.Context) ([]byte, error)
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// Close this fifo
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Close() error
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// PushBack pushes data back to the top of the fifo
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PushBack(ctx context.Context, data []byte) error
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}
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// UniqueByteFIFO defines a FIFO that Uniques its contents
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type UniqueByteFIFO interface {
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ByteFIFO
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// Has returns whether the fifo contains this data
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Has(ctx context.Context, data []byte) (bool, error)
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}
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var _ ByteFIFO = &DummyByteFIFO{}
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// DummyByteFIFO represents a dummy fifo
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type DummyByteFIFO struct{}
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// PushFunc returns nil
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func (*DummyByteFIFO) PushFunc(ctx context.Context, data []byte, fn func() error) error {
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return nil
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}
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// Pop returns nil
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func (*DummyByteFIFO) Pop(ctx context.Context) ([]byte, error) {
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return []byte{}, nil
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}
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// Close returns nil
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func (*DummyByteFIFO) Close() error {
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return nil
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}
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// Len is always 0
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func (*DummyByteFIFO) Len(ctx context.Context) int64 {
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return 0
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}
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// PushBack pushes data back to the top of the fifo
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func (*DummyByteFIFO) PushBack(ctx context.Context, data []byte) error {
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return nil
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}
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var _ UniqueByteFIFO = &DummyUniqueByteFIFO{}
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// DummyUniqueByteFIFO represents a dummy unique fifo
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type DummyUniqueByteFIFO struct {
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DummyByteFIFO
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}
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// Has always returns false
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func (*DummyUniqueByteFIFO) Has(ctx context.Context, data []byte) (bool, error) {
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return false, nil
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}
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