52 lines
949 B
Go
52 lines
949 B
Go
package blobovnicza
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import (
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"encoding/binary"
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"fmt"
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"strconv"
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)
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const firstBucketBound = uint64(32 * 1 << 10) // 32KB
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func stringifyBounds(lower, upper uint64) string {
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return fmt.Sprintf("[%s:%s]",
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stringifyByteSize(lower),
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stringifyByteSize(upper),
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)
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}
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func stringifyByteSize(sz uint64) string {
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return strconv.FormatUint(sz, 10)
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}
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func bucketKeyFromBounds(upperBound uint64) []byte {
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buf := make([]byte, binary.MaxVarintLen64)
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ln := binary.PutUvarint(buf, upperBound)
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return buf[:ln]
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}
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func bucketForSize(sz uint64) []byte {
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return bucketKeyFromBounds(upperPowerOfTwo(sz))
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}
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func upperPowerOfTwo(v uint64) (upperBound uint64) {
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for upperBound = firstBucketBound; upperBound < v; upperBound *= 2 {
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}
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return
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}
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func (b *Blobovnicza) incSize(sz uint64) {
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b.filled.Add(sz)
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}
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func (b *Blobovnicza) decSize(sz uint64) {
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b.filled.Sub(sz)
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}
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func (b *Blobovnicza) full() bool {
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return b.filled.Load() >= b.fullSizeLimit
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}
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