FSH FLUSHBUF: Difference between revisions

Revision as of 16:01, 20 February 2020

Legacy Function Warning
It is recommended to use a newer replacement for this function.
Replacement:
Remarks:	REMOVED in OS/2 Version 2.0

Flush buffer takes dirty sectors contained in the buffer cache on a particular media and writes them out. Optionally, the data can be discarded afterwards.

Syntax

FSH_FLUSHBUF (hVPB, fDiscard)

Parameters

hVPB: handle to the volume to be flushed

fDiscard

indicates disposition of cached data.

fDiscard == 0 indicates don't discard any buffers.
fDiscard == 1 indicates discard clean buffers

All other values are reserved.

Returns

Error code if any write failed. 0 otherwise.

ERROR_INVALID_PARAMETER - the value of Operation is invalid.

Device-driver/device-manager errors listed.

Calling Sequence

int pascal FSH_FLUSHBUF (hVPB, fDiscard)

unsigned long hVPB;
unsigned long fDiscard;

Remarks

If fDiscard = 1 and a write error occurred, the data in the buffer(s) that generated the error is not discarded.

See note under FSH_GETBUF for interactions with other buffer calls.

Reminder: OS/2 does not validate input parameters, so FSD should call FSH_PROBEBUF where appropriate.

FSH_FLUSHBUF may block.

@@ Line 3: / Line 3: @@
 |Remarks=REMOVED in OS/2 Version 2.0
 }}
+Flush buffer takes dirty sectors contained in the buffer cache on a particular media and writes them out. Optionally, the data can be discarded afterwards.
 ==Syntax==
-  FSH_FLUSHBUF(hVPB, fDiscard)
+  FSH_FLUSHBUF (hVPB, fDiscard)
 ==Parameters==
-;hVPB
+;hVPB : handle to the volume to be flushed
-;fDiscard
+; fDiscard : indicates disposition of cached data.
+:*fDiscard == 0 indicates don't discard any buffers.
+:*fDiscard == 1 indicates discard clean buffers
+:All other values are reserved.
 ==Returns==
+Error code if any write failed. 0 otherwise.
+ERROR_INVALID_PARAMETER - the value of Operation is invalid.
+Device-driver/device-manager errors listed.
 ==Calling Sequence==
 <PRE>
-int far pascal FSH_FLUSHBUF(hVPB, fDiscard)
+int pascal FSH_FLUSHBUF (hVPB, fDiscard)
-unsigned short hVPB;
+unsigned long hVPB;
-unsigned short fDiscard;
+unsigned long fDiscard;
 </PRE>
 ==Remarks==
+If fDiscard = 1 and a write error occurred, the data in the buffer(s) that generated the error is not discarded.
+See note under [[FSH_GETBUF]] for interactions with other buffer calls.
+; Reminder: OS/2 does not validate input parameters, so FSD should call FSH_PROBEBUF where appropriate.
+FSH_FLUSHBUF may block.
 [[Category:IFS Interfaces]]
 {{DISPLAYTITLE:FSH_FLUSHBUF}}