425 lines
11 KiB
C++
425 lines
11 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: Async.NT.cpp
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Date: 2021-9-13
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "FS.hpp"
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#include "Async.NT.hpp"
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#include "FileAdvisory.NT.hpp"
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#include <Source/Loop/Loop.hpp>
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#include <Source/Loop/LSHandle.hpp>
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namespace Aurora::IO::FS
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{
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struct FileHandle
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{
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~FileHandle();
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bool Init(const AuString &path, EFileOpenMode openMode, bool directIO, EFileAdvisoryLockLevel lock);
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HANDLE handle = INVALID_HANDLE_VALUE;
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AuString path;
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bool readOnly;
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bool directIO;
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};
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struct NtAsyncFileStream : IAsyncFileStream
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{
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AuSPtr<IAsyncTransaction> NewTransaction() override;
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void Init(const AuSPtr<FileHandle> &handle);
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AuSPtr<FileHandle> GetHandle();
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private:
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AuSPtr<FileHandle> handle_;
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};
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struct NtAsyncFileTransaction : IAsyncTransaction, AuEnableSharedFromThis<NtAsyncFileTransaction>
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{
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~NtAsyncFileTransaction();
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bool Init(const AuSPtr<FileHandle> &handle);
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bool StartRead(AuUInt64 offset, const AuSPtr<AuMemoryViewWrite> &memoryView) override;
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bool StartWrite(AuUInt64 offset, const AuSPtr<AuMemoryViewRead> &memoryView) override;
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bool Complete() override;
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AuUInt32 GetLastPacketLength() override;
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void SetCallback(const AuSPtr<IAsyncFinishedSubscriber> &sub) override;
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bool Wait(AuUInt32 timeout) override;
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AuSPtr<Loop::ILoopSource> NewLoopSource() override;
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void DispatchCb();
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HANDLE GetHandle();
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AuSPtr<FileHandle> GetFileHandle();
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// Required for a very evil hack
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OVERLAPPED overlap_ {};
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AuSPtr<NtAsyncFileTransaction> pin_;
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private:
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AuSPtr<void> memoryHold_;
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AuSPtr<FileHandle> handle_;
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HANDLE event_ = INVALID_HANDLE_VALUE;
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AuUInt32 lastAbstractStat_ {}, lastAbstractOffset_ {};
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bool latch_ {};
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AuSPtr<IAsyncFinishedSubscriber> sub_;
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};
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struct NtAsyncFileTransactionLoopSource : Loop::LSHandle
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{
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NtAsyncFileTransactionLoopSource(AuSPtr<NtAsyncFileTransaction> that) : caller_(that), Loop::LSHandle(AuUInt(that->GetFileHandle()->handle))
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{}
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virtual bool IsSignaled() override;
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virtual bool OnTrigger(AuUInt handle) override;
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virtual Loop::ELoopSource GetType() override;
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private:
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AuWPtr<NtAsyncFileTransaction> caller_;
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};
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bool NtAsyncFileTransactionLoopSource::OnTrigger(AuUInt handle)
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{
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return IsSignaled();
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}
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Loop::ELoopSource NtAsyncFileTransactionLoopSource::GetType()
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{
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return Loop::ELoopSource::eSourceAIO;
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}
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bool NtAsyncFileTransactionLoopSource::IsSignaled()
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{
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auto lock = caller_.lock();
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if (!lock) return LSEvent::IsSignaled();
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return lock->Complete();
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}
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NtAsyncFileTransaction::~NtAsyncFileTransaction()
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{
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AuWin32CloseHandle(this->event_);
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}
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FileHandle::~FileHandle()
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{
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AuWin32CloseHandle(this->handle);
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}
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bool FileHandle::Init(const AuString &path, EFileOpenMode openMode, bool directIO, EFileAdvisoryLockLevel lock)
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{
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HANDLE fileHandle;
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auto pathex = NormalizePathRet(path);
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if (pathex.empty())
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{
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return false;
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}
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auto win32Path = Locale::ConvertFromUTF8(pathex);
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if (win32Path.empty())
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{
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return false;
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}
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auto flags = FILE_FLAG_OVERLAPPED;
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if (directIO)
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{
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flags |= FILE_FLAG_NO_BUFFERING;
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}
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fileHandle = INVALID_HANDLE_VALUE;
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switch (openMode)
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{
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case EFileOpenMode::eRead:
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{
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fileHandle = CreateFileW(win32Path.c_str(), GENERIC_READ, NtLockAdvisoryToShare(lock), NULL, OPEN_EXISTING, flags, NULL);
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break;
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}
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case EFileOpenMode::eReadWrite:
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case EFileOpenMode::eWrite:
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{
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CreateDirectories(pathex, true);
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fileHandle = CreateFileW(win32Path.c_str(), (openMode == EFileOpenMode::eReadWrite) ? (GENERIC_WRITE | GENERIC_READ) : GENERIC_WRITE, NtLockAdvisoryToShare(lock), NULL, CREATE_ALWAYS, flags, NULL);
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break;
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}
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}
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if (fileHandle == INVALID_HANDLE_VALUE)
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{
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SysPushErrorIO("Missing file: {}", path);
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return {};
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}
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this->directIO = directIO;
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this->handle = fileHandle;
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this->readOnly = openMode == EFileOpenMode::eRead;
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return true;
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}
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AuSPtr<FileHandle> NtAsyncFileStream::GetHandle()
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{
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return handle_;
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}
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void NtAsyncFileStream::Init(const AuSPtr<FileHandle> &handle)
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{
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this->handle_ = handle;
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}
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AuSPtr<IAsyncTransaction> NtAsyncFileStream::NewTransaction()
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{
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auto shared = AuMakeShared<NtAsyncFileTransaction>();
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if (!shared)
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{
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return {};
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}
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if (!shared->Init(this->handle_))
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{
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return {};
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}
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return shared;
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}
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bool NtAsyncFileTransaction::Init(const AuSPtr<FileHandle> &handle)
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{
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this->handle_ = handle;
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this->overlap_.hEvent = this->event_ = CreateEvent(NULL, true, 0, NULL);
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return this->overlap_.hEvent != INVALID_HANDLE_VALUE;
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}
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static bool TranslateNtStatus(NtAsyncFileTransaction *that, BOOL val)
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{
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if ((val) ||
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(!val && GetLastError() == ERROR_IO_PENDING))
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{
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if (val)
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{
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that->DispatchCb();
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that->pin_.reset();
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}
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return true;
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}
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else
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{
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that->pin_.reset();
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SysPushErrorFIO("Async FIO error: {}", that->GetFileHandle()->path);
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return false;
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}
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}
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static VOID WINAPI GenericCompletionRoutine(
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_In_ DWORD dwErrorCode,
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_In_ DWORD dwNumberOfBytesTransfered,
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_Inout_ LPOVERLAPPED lpOverlapped
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)
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{
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auto transaction = reinterpret_cast<NtAsyncFileTransaction *>(reinterpret_cast<AuUInt8*>(lpOverlapped) - offsetof(NtAsyncFileTransaction, overlap_));
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transaction->Complete();
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}
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bool NtAsyncFileTransaction::StartRead(AuUInt64 offset, const AuSPtr<AuMemoryViewWrite> &memoryView)
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{
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if (AuExchange(this->pin_, AuSharedFromThis()))
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{
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return {};
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}
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this->latch_ = false;
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::ResetEvent(this->this->event_);
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this->memoryHold_ = memoryView;
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this->lastAbstractStat_ = memoryView->length;
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this->lastAbstractOffset_ = offset;
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this->overlap_.Offset = offset & 0xFFFFFFFF;
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this->overlap_.OffsetHigh = (offset >> 32) & 0xFFFFFFFF;
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auto ret = ::ReadFileEx(this->handle_->handle, memoryView->ptr, memoryView->length, &overlap_, GenericCompletionRoutine);
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return TranslateNtStatus(this, ret);
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}
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bool NtAsyncFileTransaction::StartWrite(AuUInt64 offset, const AuSPtr<AuMemoryViewRead> &memoryView)
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{
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if (AuExchange(this->pin_, AuSharedFromThis()))
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{
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return {};
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}
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this->latch_ = false;
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::ResetEvent(this->this->event_);
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this->memoryHold_ = memoryView;
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this->lastAbstractStat_ = memoryView->length;
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this->lastAbstractOffset_ = offset;
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this->overlap_.Offset = offset & 0xFFFFFFFF;
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this->overlap_.OffsetHigh = (offset >> 32) & 0xFFFFFFFF;
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auto ret = ::WriteFileEx(this->handle_->handle, memoryView->ptr, memoryView->length, &overlap_, GenericCompletionRoutine);
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return TranslateNtStatus(this, ret);
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}
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void NtAsyncFileTransaction::DispatchCb()
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{
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if (AuExchange(this->latch_, true))
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{
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return;
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}
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this->memoryHold_.reset();
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auto hold = AuExchange(this->pin_, {});
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if (hold->sub_)
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{
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DWORD read {};
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GetOverlappedResult(hold->handle_->handle, &hold->overlap_, &read, false);
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hold->sub_->OnAsyncFileOpFinished(hold->lastAbstractOffset_, read);
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}
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}
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bool NtAsyncFileTransaction::Complete()
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{
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auto ret = WaitForSingleObjectEx(this->event_, 0, true);
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if (ret == WAIT_OBJECT_0)
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{
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DispatchCb();
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return true;
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}
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return false;
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}
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AuUInt32 NtAsyncFileTransaction::GetLastPacketLength()
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{
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DWORD read {};
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GetOverlappedResult(this->handle_->handle, &this->overlap_, &read, false);
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return read;
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}
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void NtAsyncFileTransaction::SetCallback(const AuSPtr<IAsyncFinishedSubscriber> &sub)
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{
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this->sub_ = sub;
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}
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bool NtAsyncFileTransaction::Wait(AuUInt32 timeout)
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{
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auto ret = WaitForSingleObjectEx(this->event_, timeout ? timeout : INFINITE, true);
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if (ret == WAIT_OBJECT_0)
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{
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DispatchCb();
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return true;
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}
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return false;
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}
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HANDLE NtAsyncFileTransaction::GetHandle()
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{
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return this->event_;
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}
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AuSPtr<FileHandle> NtAsyncFileTransaction::GetFileHandle()
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{
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return this->handle_;
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}
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AuSPtr<Loop::ILoopSource> NtAsyncFileTransaction::NewLoopSource()
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{
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return AuMakeShared<NtAsyncFileTransactionLoopSource>(AuSharedFromThis());
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}
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AUKN_SYM IAsyncFileStream *OpenAsyncNew(const AuString &path, EFileOpenMode openMode, bool directIO, EFileAdvisoryLockLevel lock)
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{
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AuSPtr<FileHandle> fileHandle;
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NtAsyncFileStream *stream;
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if (path.empty())
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{
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SysPushErrorParam("Empty path");
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return {};
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}
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if (!EFileOpenModeIsValid(openMode))
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{
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SysPushErrorParam("Invalid open mode");
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return {};
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}
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try
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{
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fileHandle = AuMakeShared<FileHandle>();
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if (!fileHandle->Init(path, openMode, directIO, lock))
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{
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return {};
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}
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}
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catch (...)
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{
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SysPushErrorCatch("Couldn't initialize FileHandle");
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return {};
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}
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try
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{
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stream = _new NtAsyncFileStream();
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if (!stream)
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{
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return {};
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}
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stream->Init(fileHandle);
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}
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catch (...)
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{
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if (stream) delete stream;
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SysPushErrorCatch("Couldn't initialize NtAsyncFileStream");
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return {};
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}
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return stream;
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}
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AUKN_SYM void OpenAsyncRelease(IAsyncFileStream *handle)
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{
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AuSafeDelete<NtAsyncFileStream *>(handle);
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}
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AUKN_SYM AuUInt32 WaitMultiple(const AuList<AuSPtr<IAsyncTransaction>> &files, AuUInt32 timeout)
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{
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AuList<HANDLE> handles;
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AuUInt32 count {};
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if (files.empty())
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{
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return true;
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}
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for (const auto & file : files)
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{
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handles.push_back(AuStaticPointerCast<NtAsyncFileTransaction>(file)->GetHandle());
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}
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auto ret = WaitForMultipleObjectsEx(handles.size(), handles.data(), false, timeout ? timeout : INFINITE, TRUE);
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if (ret == WAIT_TIMEOUT || ret == WAIT_FAILED)
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{
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return false;
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}
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for (auto &file : files)
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{
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count += AuStaticPointerCast<NtAsyncFileTransaction>(file)->Complete();
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}
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return count;
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}
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} |