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#include "chunked_output_stream.h"
#include <util/system/sanitizers.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
TChunkedOutputStream::TChunkedOutputStream(
TRefCountedTypeCookie tagCookie,
IMemoryUsageTrackerPtr memoryUsageTracker,
size_t initialReserveSize,
size_t maxReserveSize)
: MemoryUsageTracker_(std::move(memoryUsageTracker))
, CurrentChunkMemoryUsageGuard_(TMemoryUsageTrackerGuard::Build(MemoryUsageTracker_))
, MaxReserveSize_(RoundUpToPage(maxReserveSize))
, CurrentReserveSize_(RoundUpToPage(initialReserveSize))
, CurrentChunk_(tagCookie, /*size*/ 0)
{
YT_VERIFY(MaxReserveSize_ > 0);
if (CurrentReserveSize_ > MaxReserveSize_) {
CurrentReserveSize_ = MaxReserveSize_;
}
}
std::vector<TSharedRef> TChunkedOutputStream::Finish()
{
FinishedChunks_.push_back(TrackMemory(MemoryUsageTracker_, TSharedRef::FromBlob(std::move(CurrentChunk_))));
CurrentChunkMemoryUsageGuard_.Release();
YT_ASSERT(CurrentChunk_.IsEmpty());
FinishedSize_ = 0;
for (const auto& chunk : FinishedChunks_) {
NSan::CheckMemIsInitialized(chunk.Begin(), chunk.Size());
}
return std::move(FinishedChunks_);
}
size_t TChunkedOutputStream::GetSize() const
{
return FinishedSize_ + CurrentChunk_.Size();
}
size_t TChunkedOutputStream::GetCapacity() const
{
return FinishedSize_ + CurrentChunk_.Capacity();
}
void TChunkedOutputStream::ReserveNewChunk(size_t spaceRequired)
{
YT_ASSERT(CurrentChunk_.Size() == CurrentChunk_.Capacity());
FinishedSize_ += CurrentChunk_.Size();
FinishedChunks_.push_back(TrackMemory(MemoryUsageTracker_, TSharedRef::FromBlob(std::move(CurrentChunk_))));
CurrentReserveSize_ = std::min(2 * CurrentReserveSize_, MaxReserveSize_);
CurrentChunk_.Reserve(std::max(RoundUpToPage(spaceRequired), CurrentReserveSize_));
UpdateCurrentChunkMemoryUsage();
}
void TChunkedOutputStream::DoWrite(const void* buffer, size_t length)
{
if (CurrentChunk_.Capacity() == 0) {
CurrentChunk_.Reserve(CurrentReserveSize_);
}
auto spaceAvailable = std::min(length, CurrentChunk_.Capacity() - CurrentChunk_.Size());
CurrentChunk_.Append(buffer, spaceAvailable);
auto spaceRequired = length - spaceAvailable;
if (spaceRequired > 0) {
ReserveNewChunk(spaceRequired);
CurrentChunk_.Append(static_cast<const char*>(buffer) + spaceAvailable, spaceRequired);
}
UpdateCurrentChunkMemoryUsage();
}
size_t TChunkedOutputStream::DoNext(void** ptr)
{
if (CurrentChunk_.Size() == CurrentChunk_.Capacity()) {
if (CurrentChunk_.Capacity() == 0) {
CurrentChunk_.Reserve(CurrentReserveSize_);
} else {
ReserveNewChunk(0);
}
}
auto spaceAvailable = CurrentChunk_.Capacity() - CurrentChunk_.Size();
YT_ASSERT(spaceAvailable > 0);
*ptr = CurrentChunk_.End();
CurrentChunk_.Resize(CurrentChunk_.Capacity(), /*initializeStorage*/ false);
UpdateCurrentChunkMemoryUsage();
return spaceAvailable;
}
void TChunkedOutputStream::DoUndo(size_t len)
{
YT_VERIFY(CurrentChunk_.Size() >= len);
CurrentChunk_.Resize(CurrentChunk_.Size() - len);
UpdateCurrentChunkMemoryUsage();
}
char* TChunkedOutputStream::Preallocate(size_t size)
{
size_t available = CurrentChunk_.Capacity() - CurrentChunk_.Size();
if (available < size) {
FinishedSize_ += CurrentChunk_.Size();
FinishedChunks_.push_back(TrackMemory(MemoryUsageTracker_, TSharedRef::FromBlob(std::move(CurrentChunk_))));
CurrentReserveSize_ = std::min(2 * CurrentReserveSize_, MaxReserveSize_);
CurrentChunk_.Reserve(std::max(RoundUpToPage(size), CurrentReserveSize_));
}
UpdateCurrentChunkMemoryUsage();
return CurrentChunk_.End();
}
void TChunkedOutputStream::Advance(size_t size)
{
YT_ASSERT(CurrentChunk_.Size() + size <= CurrentChunk_.Capacity());
CurrentChunk_.Resize(CurrentChunk_.Size() + size, false);
UpdateCurrentChunkMemoryUsage();
}
void TChunkedOutputStream::UpdateCurrentChunkMemoryUsage()
{
CurrentChunkMemoryUsageGuard_.SetSize(CurrentChunk_.Capacity());
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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