comments for gcache update

This commit is contained in:
John
2019-06-10 21:23:49 +08:00
parent 9f8c481992
commit f98db6d21c
2 changed files with 5 additions and 8 deletions

View File

@ -7,10 +7,10 @@
// Package gcache provides high performance and concurrent-safe in-memory cache for process.
package gcache
// 全局缓存管理对象
// Default cache object.
var cache = New()
// (使用全局KV缓存对象)设置kv缓存键值对过期时间单位为**毫秒**
// Set sets <key> with <value>, which is expired after <expire> milliseconds.
func Set(key interface{}, value interface{}, expire int) {
cache.Set(key, value, expire)
}

View File

@ -13,13 +13,12 @@ import (
"unsafe"
)
// 缓存对象。
// 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。
// Cache struct.
type Cache struct {
*memCache
}
// Cache对象按照缓存键名首字母做了分组
// New creates and returns a new cache object.
func New(lruCap...int) *Cache {
c := &Cache {
memCache : newMemCache(lruCap...),
@ -28,10 +27,8 @@ func New(lruCap...int) *Cache {
return c
}
// 清空缓存中的所有数据
// Clear clears all data of the cache.
func (c *Cache) Clear() {
// 使用原子操作替换缓存对象
old := atomic.SwapPointer((*unsafe.Pointer)(unsafe.Pointer(&c.memCache)), unsafe.Pointer(newMemCache()))
// 关闭旧的缓存对象
(*memCache)(old).Close()
}