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