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37 lines
1.0 KiB
Go
37 lines
1.0 KiB
Go
// Copyright 2018 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://gitee.com/johng/gf.
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package gcache
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import (
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"gitee.com/johng/gf/g/os/gtimer"
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"sync/atomic"
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"time"
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"unsafe"
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)
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// 缓存对象。
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// 底层只有一个缓存对象，如果需要提高并发性能，可新增缓存对象无锁哈希表，用键名做固定分区。
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type Cache struct {
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*memCache
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}
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// Cache对象按照缓存键名首字母做了分组
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func New(lruCap...int) *Cache {
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c := &Cache {
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memCache : newMemCache(lruCap...),
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}
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gtimer.AddSingleton(time.Second, c.syncEventAndClearExpired)
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return c
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}
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// 清空缓存中的所有数据
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func (c *Cache) Clear() {
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// 使用原子操作替换缓存对象
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old := atomic.SwapPointer((*unsafe.Pointer)(unsafe.Pointer(&c.memCache)), unsafe.Pointer(newMemCache()))
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// 关闭旧的缓存对象
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(*memCache)(old).Close()
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} |