janwas
2374caac3e
. completely rewrite waio - use IOCP, add several hardcore optimizations. now outperforms the AS SSD and ATTO benchmarks when writing . refactor file interface - use LIO_READ instead of 'r', allow access to file descriptor. . completely rewrite the IO wrapper. now much more simple, less CPU overhead, adds support for pre-issue/post-completion hooks and preallocation. io::Run defaults to simple synchronous IO; use io::Parameters to get asynchronous. . add alignment.h with constants and Align() function template (more efficient than round_up for compile-time constants) . add UniqueRange - similar to C++0x unique_ptr (emulated for C++03), plus a built-in size. avoids expensive thread-safe reference counting in shared_ptr. cleanup: - move fat_time functions into archive_zip - remove no longer needed io_align and block_cache - reduce dependencies in sysdep/compiler (move parts to code_annotation.h) - move IOCP into separate file (reused by waio) This was SVN commit r9350.
51 lines
2.3 KiB
C
51 lines
2.3 KiB
C
/* Copyright (c) 2010 Wildfire Games
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* I/O completion port
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*/
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#ifndef INCLUDED_WIOCP
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#define INCLUDED_WIOCP
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#include "lib/sysdep/os/win/win.h"
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// this appears to be the best solution for IO notification.
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// there are three alternatives:
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// - multiple threads with blocking I/O. this is rather inefficient when
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// many directories (e.g. mods) are being watched.
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// - normal overlapped I/O: build a contiguous array of the hEvents
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// in all OVERLAPPED structures, and WaitForMultipleObjects.
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// it would be cumbersome to update this array when adding/removing watches.
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// - callback notification: a notification function is called when the thread
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// that initiated the I/O (ReadDirectoryChangesW) enters an alertable
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// wait state. it is desirable for notifications to arrive at a single
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// known point - see dir_watch_Poll. however, other APIs might also
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// trigger APC delivery.
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// @param hIOCP 0 to create a new port
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extern void AttachToCompletionPort(HANDLE hFile, HANDLE& hIOCP, ULONG_PTR key, DWORD numConcurrentThreads = 0);
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extern LibError PollCompletionPort(HANDLE hIOCP, DWORD timeout, DWORD& bytesTransferred, ULONG_PTR& key, OVERLAPPED*& ovl);
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#endif // #ifndef INCLUDED_WIOCP
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