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34 lines
512 B
Go
34 lines
512 B
Go
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package two
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import "sync"
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type antiNodeCache struct {
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mu sync.RWMutex
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data map[coords]struct{}
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}
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func newAntiNodeCache() antiNodeCache {
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return antiNodeCache{
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data: make(map[coords]struct{}),
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}
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}
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func (c *antiNodeCache) len() int {
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return len(c.data)
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}
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func (c *antiNodeCache) contains(coords coords) bool {
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c.mu.RLock()
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defer c.mu.RUnlock()
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_, ok := c.data[coords]
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return ok
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}
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func (c *antiNodeCache) insert(coords coords) {
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c.mu.Lock()
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defer c.mu.Unlock()
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c.data[coords] = struct{}{}
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}
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