Method forEachChunk

pkg/sentry/pgalloc/pgalloc.go:246–258

forEachChunk invokes fn on a sequence of chunks that collectively span all bytes in fr. In each call, chunkFR is the subset of fr that falls within chunk. If any call to f returns false, forEachChunk stops iteration and returns.

(fr memmap.FileRange, fn func(chunk *chunkInfo, chunkFR memmap.FileRange) bool)

// chunk. If any call to f returns false, forEachChunk stops iteration and
// returns.
func (f *MemoryFile) forEachChunk(fr memmap.FileRange, fn func(chunk *chunkInfo, chunkFR memmap.FileRange) bool) {
	chunks := f.chunksLoad()
	chunkStart := fr.Start &^ chunkMask
	i := int(fr.Start / chunkSize)
	for chunkStart < fr.End {
		chunkEnd := chunkStart + chunkSize
		if !fn(&chunks[i], fr.Intersect(memmap.FileRange{chunkStart, chunkEnd})) {
			return
		}
		chunkStart = chunkEnd
		i++
	}
}

// unwasteInfo is the value type of MemoryFile.unwasteSmall/Huge.
//