message
Receives a generic message delivered from an attached provider.
Declaration
virtual IOReturn message(
UInt32 type,
IOService *provider,
void *argument = 0 );Parameters
- type:
A type defined in
IOMessage.hor defined by the provider family. - provider:
The provider from which the message originates.
- argument:
An argument defined by the provider family, not used by IOService.
Return Value
An IOReturn code defined by the message type.
Overview
A provider may deliver messages via the message method to its clients informing them of state changes, such as kIOMessageServiceIsTerminated or kIOMessageServiceIsSuspended. Certain messages are defined by the I/O Kit in IOMessage.h while others may be family dependent. This method is implemented in the client to receive messages.
See Also
Miscellaneous
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