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61 lines
1.5 KiB
61 lines
1.5 KiB
package page_writer
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import (
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"sync/atomic"
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)
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func (up *UploadPipeline) LockForRead(startOffset, stopOffset int64) {
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startLogicChunkIndex := LogicChunkIndex(startOffset / up.ChunkSize)
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stopLogicChunkIndex := LogicChunkIndex(stopOffset / up.ChunkSize)
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if stopOffset%up.ChunkSize > 0 {
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stopLogicChunkIndex += 1
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}
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up.chunksLock.Lock()
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defer up.chunksLock.Unlock()
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for i := startLogicChunkIndex; i < stopLogicChunkIndex; i++ {
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if count, found := up.activeReadChunks[i]; found {
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up.activeReadChunks[i] = count + 1
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} else {
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up.activeReadChunks[i] = 1
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}
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}
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}
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func (up *UploadPipeline) UnlockForRead(startOffset, stopOffset int64) {
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startLogicChunkIndex := LogicChunkIndex(startOffset / up.ChunkSize)
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stopLogicChunkIndex := LogicChunkIndex(stopOffset / up.ChunkSize)
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if stopOffset%up.ChunkSize > 0 {
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stopLogicChunkIndex += 1
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}
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up.chunksLock.Lock()
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defer up.chunksLock.Unlock()
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for i := startLogicChunkIndex; i < stopLogicChunkIndex; i++ {
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if count, found := up.activeReadChunks[i]; found {
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if count == 1 {
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delete(up.activeReadChunks, i)
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} else {
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up.activeReadChunks[i] = count - 1
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}
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}
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}
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}
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func (up *UploadPipeline) IsLocked(logicChunkIndex LogicChunkIndex) bool {
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if count, found := up.activeReadChunks[logicChunkIndex]; found {
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return count > 0
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}
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return false
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}
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func (up *UploadPipeline) waitForCurrentWritersToComplete() {
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up.uploaderCountCond.L.Lock()
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t := int32(100)
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for {
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t = atomic.LoadInt32(&up.uploaderCount)
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if t <= 0 {
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break
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}
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up.uploaderCountCond.Wait()
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}
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up.uploaderCountCond.L.Unlock()
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}
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