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ResourceRequestEx (Compact 2013)

  • Article

3/26/2014

This function allows devices to request exclusive access to shareable resources.

Syntax

BOOL ResourceRequestEx (
  DWORD dwResId,
  DWORD dwId,
  DWORD dwLen,
  DWORD dwFlags
);

Parameters

  • dwResId
    [in] Resource identifier, which is a label for a set of numbers. The following table shows the existing resource identifiers and their values, which are defined in Resmgr.h.

    Resource identifier

    Value

    RESMGR_IRQ

    0x00001

    RESMGR_IOSPACE

    0x00002

    Although some resource identifiers are for your use, values below RESMGR_BASE_OEM are reserved. Values greater than RESMGR_MAX_OEM are reserved. The following table shows the resource identifiers that you can use and their values, which are defined in Resmgr.h.

    Resource identifier

    Value

    RESMGR_BASE_OEM

    0x00080000

    RESMGR_MAX_OEM

    0x000FFFFF
  • dwId
    [in] Identifer of the resource to request exclusive access.
  • dwLen
    [in] Number of resources to request.
  • dwFlags
    [in] Set to RREXF_REQUEST_EXCLUSIVE to request exclusive access of the shareable resource.

Return Value

TRUE indicates success. FALSE indicates failure.

You cannot have a partial allocation or a partial release of resources.

Remarks

Some devices are not capable of sharing resources. For example, some network cards need exclusive access to interrupt requests (IRQs) even when the IRQ is shareable. Bus drivers should make this request on behalf of the device drivers they load.

Requirements

Header

winbase.h

See Also

Reference

Device Manager Functions