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完成 I/O 要求時指定優先順序提升

當驅動程式完成 I/O 要求時,它可以呼叫 WdfRequestCompleteWithPriorityBoost 來指定系統用來提升要求 I/O 作業之線程運行時間優先順序的值。

如果驅動程式呼叫 WdfRequestCompleteWdfRequestCompleteWithInformation ,而不是 WdfRequestCompleteWithPriorityBoost,架構會使用以裝置類型為基礎的預設優先順序提升值。 下表列出架構使用的預設優先順序提升值。 裝置類型和優先順序提升常數定義於 Wdm.h 中。

裝置類型 默認優先順序提升
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