fd5b4205080d501634136517fa45678b3607967d
[reactos.git] / reactos / ntoskrnl / io / flush.c
1 /*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: ntoskrnl/io/flush.c
5 * PURPOSE: Flushing file buffer
6 * PROGRAMMER: David Welch (welch@cwcom.net)
7 * UPDATE HISTORY:
8 * Created 22/05/98
9 */
10
11 /* INCLUDES *****************************************************************/
12
13 #include <ddk/ntddk.h>
14 #include <internal/ob.h>
15
16 #define NDEBUG
17 #include <internal/debug.h>
18
19 /* FUNCTIONS *****************************************************************/
20
21
22 NTSTATUS
23 STDCALL
24 NtFlushWriteBuffer(VOID)
25 {
26 KeFlushWriteBuffer();
27 return STATUS_SUCCESS;
28 }
29
30 NTSTATUS
31 STDCALL
32 NtFlushBuffersFile (
33 IN HANDLE FileHandle,
34 OUT PIO_STATUS_BLOCK IoStatusBlock
35 )
36 /*
37 * FUNCTION: Flushes cached file data to disk
38 * ARGUMENTS:
39 * FileHandle = Points to the file
40 * IoStatusBlock = Caller must supply storage to receive the result of
41 * the flush buffers operation. The information field is
42 * set to number of bytes flushed to disk.
43 * RETURNS: Status
44 * REMARKS: This function maps to the win32 FlushFileBuffers
45 */
46 {
47 PFILE_OBJECT FileObject = NULL;
48 PIRP Irp;
49 PIO_STACK_LOCATION StackPtr;
50 KEVENT Event;
51 NTSTATUS Status;
52
53 Status = ObReferenceObjectByHandle(FileHandle,
54 FILE_WRITE_DATA,
55 NULL,
56 UserMode,
57 (PVOID*)&FileObject,
58 NULL);
59 if (Status != STATUS_SUCCESS)
60 {
61 return(Status);
62 }
63
64 KeInitializeEvent(&Event,NotificationEvent,FALSE);
65 Irp = IoBuildSynchronousFsdRequest(IRP_MJ_FLUSH_BUFFERS,
66 FileObject->DeviceObject,
67 NULL,
68 0,
69 NULL,
70 &Event,
71 IoStatusBlock);
72
73 StackPtr = IoGetNextIrpStackLocation(Irp);
74 StackPtr->FileObject = FileObject;
75
76 Status = IoCallDriver(FileObject->DeviceObject,Irp);
77 if (Status==STATUS_PENDING)
78 {
79 KeWaitForSingleObject(&Event,Executive,KernelMode,FALSE,NULL);
80 Status = Irp->IoStatus.Status;
81 }
82 return(Status);
83 }