VideoPortFreeCommonBuffer function (video.h)
The VideoPortFreeCommonBuffer function is obsolete and is supported only for backward compatibility with existing drivers. In its place, driver writers should use VideoPortReleaseCommonBuffer.
VideoPortFreeCommonBuffer deallocates system memory that was allocated by a call to VideoPortGetCommonBuffer.
Syntax
VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortFreeCommonBuffer(
[in] IN PVOID HwDeviceExtension,
[in] IN ULONG Length,
[in] IN PVOID VirtualAddress,
[in] IN PHYSICAL_ADDRESS LogicalAddress,
[in] IN BOOLEAN CacheEnabled
);
Parameters
[in] HwDeviceExtension
Pointer to the miniport driver's device extension.
[in] Length
Specifies the number of bytes of memory to be freed.
[in] VirtualAddress
Pointer to the corresponding virtual address of the allocated memory range.
[in] LogicalAddress
Specifies the logical address of the buffer to be freed.
[in] CacheEnabled
Indicates whether the allocated memory is cached.
Return value
None
Remarks
Except for VideoPortGetCommonBuffer's Alignment parameter, all of the parameters used in a call to VideoPortFreeCommonBuffer must have the same values as those used in the previous call to VideoPortGetCommonBuffer.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows 2000 and later versions of the Windows operating systems. |
| Target Platform | Desktop |
| Header | video.h (include Video.h) |
| Library | Videoprt.lib |
| DLL | Videoprt.sys |
| IRQL | PASSIVE_LEVEL |