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UNIX for Dummies Questions & Answers
Edit Multiple Files in VI
Post 41451 by djschmitt on Monday 6th of October 2003 04:12:13 PM
10-06-2003
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LEARN ABOUT PHP
ddi_get_instance
ddi_get_instance(9F) Kernel Functions for Drivers ddi_get_instance(9F) NAME
ddi_get_instance - get device instance number SYNOPSIS
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_get_instance(dev_info_t *dip); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). PARAMETERS
dip Pointer to dev_info structure. DESCRIPTION
ddi_get_instance() returns the instance number of the device corresponding to dip. The system assigns an instance number to every device. Instance numbers for devices attached to the same driver are unique. This pro- vides a way for the system and the driver to uniquely identify one or more devices of the same type. The instance number is derived by the system from different properties for different device types in an implementation specific manner. Once an instance number has been assigned to a device, it will remain the same even across reconfigurations and reboots. Therefore, instance numbers seen by a driver may not appear to be in consecutive order. For example, if device foo0 has been assigned an instance number of 0 and device foo1 has been assigned an instance number of 1, if foo0 is removed, foo1 will continue to be associated with instance number 1 (even though foo1 is now the only device of its type on the system). RETURN VALUES
ddi_get_instance() returns the instance number of the device corresponding to dip. CONTEXT
ddi_get_instance()can be called from user or interrupt context. SEE ALSO
path_to_inst(4) Writing Device Drivers SunOS 5.10 20 Jul 1994 ddi_get_instance(9F)