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Handle resource changes when the resources is already evicted from cache
Also fix a logical flaw in the cache resizer that made it too aggressive. After this I haven't been able to reproduce #11988, but I need to look closer. Closes #11973 Updates #11988
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// Copyright 2024 The Hugo Authors. All rights reserved. | ||
// | ||
// 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. | ||
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package collections | ||
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import "sync" | ||
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// Stack is a simple LIFO stack that is safe for concurrent use. | ||
type Stack[T any] struct { | ||
items []T | ||
zero T | ||
mu sync.RWMutex | ||
} | ||
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func NewStack[T any]() *Stack[T] { | ||
return &Stack[T]{} | ||
} | ||
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func (s *Stack[T]) Push(item T) { | ||
s.mu.Lock() | ||
defer s.mu.Unlock() | ||
s.items = append(s.items, item) | ||
} | ||
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func (s *Stack[T]) Pop() (T, bool) { | ||
s.mu.Lock() | ||
defer s.mu.Unlock() | ||
if len(s.items) == 0 { | ||
return s.zero, false | ||
} | ||
item := s.items[len(s.items)-1] | ||
s.items = s.items[:len(s.items)-1] | ||
return item, true | ||
} | ||
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func (s *Stack[T]) Peek() (T, bool) { | ||
s.mu.RLock() | ||
defer s.mu.RUnlock() | ||
if len(s.items) == 0 { | ||
return s.zero, false | ||
} | ||
return s.items[len(s.items)-1], true | ||
} | ||
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func (s *Stack[T]) Len() int { | ||
s.mu.RLock() | ||
defer s.mu.RUnlock() | ||
return len(s.items) | ||
} | ||
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func (s *Stack[T]) Drain() []T { | ||
s.mu.Lock() | ||
defer s.mu.Unlock() | ||
items := s.items | ||
s.items = nil | ||
return items | ||
} |
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