Angeben von Prioritätserhöhungen beim Abschließen von E/A-Anforderungen
Wenn ein Treiber eine E/A-Anforderung abschließt, kann er WdfRequestCompleteWithPriorityBoost aufrufen, um einen Wert anzugeben, den das System verwendet, um die Laufzeitpriorität des Threads zu erhöhen, der den E/A-Vorgang angefordert hat.
Wenn der Treiber WdfRequestComplete oder WdfRequestCompleteWithInformation anstelle von WdfRequestCompleteWithPriorityBoost aufruft, verwendet das Framework einen standardmäßigen Prioritätsschubwert, der auf dem Gerätetyp basiert. In der folgenden Tabelle sind die Standardprioritätswerte aufgeführt, die das Framework verwendet. Der Gerätetyp und die Prioritätsverstärkungskonstanten sind in Wdm.h definiert.
| Gerätetyp | Standardprioritätserhöhung |
|---|---|
| FILE_DEVICE_UNDEFINED | IO_NO_INCREMENT |
| FILE_DEVICE_BEEP | IO_NO_INCREMENT |
| FILE_DEVICE_CD_ROM | IO_CD_ROM_INCREMENT |
| FILE_DEVICE_CD_ROM_FILE_SYSTEM | IO_CD_ROM_INCREMENT |
| FILE_DEVICE_CONTROLLER | IO_NO_INCREMENT |
| FILE_DEVICE_DATALINK | IO_NO_INCREMENT |
| FILE_DEVICE_DFS | IO_NO_INCREMENT |
| FILE_DEVICE_DISK | IO_DISK_INCREMENT |
| FILE_DEVICE_DISK_FILE_SYSTEM | IO_DISK_INCREMENT |
| FILE_DEVICE_FILE_SYSTEM | IO_NO_INCREMENT |
| FILE_DEVICE_INPORT_PORT | IO_NO_INCREMENT |
| FILE_DEVICE_KEYBOARD | IO_KEYBOARD_INCREMENT |
| FILE_DEVICE_MAILSLOT | IO_MAILSLOT_INCREMENT |
| FILE_DEVICE_MIDI_IN | IO_SOUND_INCREMENT |
| FILE_DEVICE_MIDI_OUT | IO_SOUND_INCREMENT |
| FILE_DEVICE_MOUSE | IO_MOUSE_INCREMENT |
| FILE_DEVICE_MULTI_UNC_PROVIDER | IO_NO_INCREMENT |
| FILE_DEVICE_NAMED_PIPE | IO_NAMED_PIPE_INCREMENT |
| FILE_DEVICE_NETWORK | IO_NETWORK_INCREMENT |
| FILE_DEVICE_NETWORK_BROWSER | IO_NETWORK_INCREMENT |
| FILE_DEVICE_NETWORK_FILE_SYSTEM | IO_NETWORK_INCREMENT |
| FILE_DEVICE_NULL | IO_NO_INCREMENT |
| FILE_DEVICE_PARALLEL_PORT | IO_PARALLEL_INCREMENT |
| FILE_DEVICE_PHYSICAL_NETCARD | IO_NETWORK_INCREMENT |
| FILE_DEVICE_PRINTER | IO_NO_INCREMENT |
| FILE_DEVICE_SCANNER | IO_NO_INCREMENT |
| FILE_DEVICE_SERIAL_MOUSE_PORT | IO_SERIAL_INCREMENT |
| FILE_DEVICE_SERIAL_PORT | IO_SERIAL_INCREMENT |
| FILE_DEVICE_SCREEN | IO_VIDEO_INCREMENT |
| FILE_DEVICE_SOUND | IO_SOUND_INCREMENT |
| FILE_DEVICE_STREAMS | IO_SOUND_INCREMENT |
| FILE_DEVICE_TAPE | IO_NO_INCREMENT |
| FILE_DEVICE_TAPE_FILE_SYSTEM | IO_NO_INCREMENT |
| FILE_DEVICE_TRANSPORT | IO_NO_INCREMENT |
| FILE_DEVICE_UNKNOWN | IO_NO_INCREMENT |
| FILE_DEVICE_VIDEO | IO_VIDEO_INCREMENT |
| FILE_DEVICE_VIRTUAL_DISK | IO_DISK_INCREMENT |
| FILE_DEVICE_WAVE_IN | IO_SOUND_INCREMENT |
| FILE_DEVICE_WAVE_OUT | IO_SOUND_INCREMENT |
| FILE_DEVICE_8042_PORT | IO_KEYBOARD_INCREMENT |
| FILE_DEVICE_NETWORK_REDIRECTOR | IO_NETWORK_INCREMENT |
| FILE_DEVICE_BATTERY | IO_NO_INCREMENT |
| FILE_DEVICE_BUS_EXTENDER | IO_NO_INCREMENT |
| FILE_DEVICE_MODEM | IO_SERIAL_INCREMENT |
| FILE_DEVICE_VDM | IO_NO_INCREMENT |
| FILE_DEVICE_MASS_STORAGE | IO_DISK_INCREMENT |
| FILE_DEVICE_SMB | IO_NETWORK_INCREMENT |
| FILE_DEVICE_KS | IO_SOUND_INCREMENT |
| FILE_DEVICE_CHANGER | IO_NO_INCREMENT |
| FILE_DEVICE_SMARTCARD | IO_NO_INCREMENT |
| FILE_DEVICE_ACPI | IO_NO_INCREMENT |
| FILE_DEVICE_DVD | IO_NO_INCREMENT |
| FILE_DEVICE_FULLSCREEN_VIDEO | IO_VIDEO_INCREMENT |
| FILE_DEVICE_DFS_FILE_SYSTEM | IO_NO_INCREMENT |
| FILE_DEVICE_DFS_VOLUME | IO_NO_INCREMENT |
| FILE_DEVICE_SERENUM | IO_SERIAL_INCREMENT |
| FILE_DEVICE_TERMSRV | IO_NO_INCREMENT |
| FILE_DEVICE_KSEC | IO_NO_INCREMENT |
| FILE_DEVICE_FIPS | IO_NO_INCREMENT |
| FILE_DEVICE_INFINIBAND | IO_NO_INCREMENT |