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63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* Copyright (c) Mark Harmstone 2016
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*
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* This file is part of WinBtrfs.
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*
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* WinBtrfs is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public Licence as published by
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* the Free Software Foundation, either version 3 of the Licence, or
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* (at your option) any later version.
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*
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* WinBtrfs is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public Licence for more details.
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*
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* You should have received a copy of the GNU Lesser General Public Licence
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* along with WinBtrfs. If not, see <http://www.gnu.org/licenses/>. */
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#include "btrfs_drv.h"
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#define INTERVAL 15000 // in milliseconds
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static void do_flush(device_extension* Vcb) {
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LIST_ENTRY rollback;
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InitializeListHead(&rollback);
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FsRtlEnterFileSystem();
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acquire_tree_lock(Vcb, TRUE);
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if (Vcb->write_trees > 0)
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do_write(Vcb, &rollback);
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free_tree_cache(&Vcb->tree_cache);
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clear_rollback(&rollback);
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release_tree_lock(Vcb, TRUE);
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FsRtlExitFileSystem();
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}
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void STDCALL flush_thread(void* context) {
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device_extension* Vcb = context;
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LARGE_INTEGER due_time;
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KeInitializeTimer(&Vcb->flush_thread_timer);
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due_time.QuadPart = -INTERVAL * 10000;
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KeSetTimer(&Vcb->flush_thread_timer, due_time, NULL);
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while (TRUE) {
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KeWaitForSingleObject(&Vcb->flush_thread_timer, Executive, KernelMode, FALSE, NULL);
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do_flush(Vcb);
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KeSetTimer(&Vcb->flush_thread_timer, due_time, NULL);
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}
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KeCancelTimer(&Vcb->flush_thread_timer);
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PsTerminateSystemThread(STATUS_SUCCESS);
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}
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