18 // storage. Once the full counts storage is allocated, the single-sample must
39   if (!counts()) {  in Accumulate()
46       // entries in the counts array so move the single-sample.  in Accumulate()
47       if (counts())  in Accumulate()
59       subtle::NoBarrier_AtomicIncrement(&counts()[bucket_index], count);  in Accumulate()
79   if (counts() || MountExistingCountsStorage()) {  in TotalCount()
82     const HistogramBase::AtomicCount* counts_array = counts();  in TotalCount()
102   if (counts() || MountExistingCountsStorage())  in GetCountAtIndex()
103     return subtle::NoBarrier_Load(&counts()[bucket_index]);  in GetCountAtIndex()
119   if (counts() || MountExistingCountsStorage()) {  in Iterator()
120     return std::make_unique<SampleVectorIterator>(counts(), counts_size(),  in Iterator()
162   // Single-value storage is possible if there is no counts storage and the  in AddSubtractImpl()
164   if (!counts()) {  in AddSubtractImpl()
170         // Handle race-condition that mounted counts storage between above and  in AddSubtractImpl()
172         if (counts())  in AddSubtractImpl()
178     // The counts storage will be needed to hold the multiple incoming values.  in AddSubtractImpl()
182   // Go through the iterator and add the counts into correct bucket.  in AddSubtractImpl()
195         &counts()[dest_index], op == HistogramSamples::ADD ? count : -count);  in AddSubtractImpl()
243   DCHECK(counts());  in MoveSingleSampleToCounts()
245   // Disable the single-sample since there is now counts storage for the data.  in MoveSingleSampleToCounts()
255   subtle::NoBarrier_AtomicIncrement(&counts()[sample.bucket], sample.count);  in MoveSingleSampleToCounts()
268       // Create the actual counts storage while the above lock is acquired.  in MountCountsStorageAndMoveSingleSample()
269       HistogramBase::Count* counts = CreateCountsStorageWhileLocked();  in MountCountsStorageAndMoveSingleSample()  local
270       DCHECK(counts);  in MountCountsStorageAndMoveSingleSample()
277       set_counts(counts);  in MountCountsStorageAndMoveSingleSample()
297   return counts() != nullptr;  in MountExistingCountsStorage()
309     const DelayedPersistentAllocation& counts)  in PersistentSampleVector()  argument
310     : SampleVectorBase(id, meta, bucket_ranges), persistent_counts_(counts) {  in PersistentSampleVector()
333   // There is no early exit if counts is not yet mounted because, given that  in MountExistingCountsStorage()
342   // Mount the counts array in position.  in MountExistingCountsStorage()
347   return counts() != nullptr;  in MountExistingCountsStorage()
365     const std::vector<HistogramBase::AtomicCount>* counts,  in SampleVectorIterator()  argument
367     : counts_(&(*counts)[0]),  in SampleVectorIterator()
368       counts_size_(counts->size()),  in SampleVectorIterator()
376     const HistogramBase::AtomicCount* counts,  in SampleVectorIterator()  argument
379     : counts_(counts),  in SampleVectorIterator()