Description: This file shows how to implement a basic I/O Kit driver kernel extension (KEXT).
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Change History (most recent first):
2.0 08/13/2008 Add Leopard user client API for supporting 64-bit user processes.
Now requires Xcode 3.0 or later to build.
1.1 05/22/2007 User client performs endian swapping when called from a user process
running using Rosetta. Updated to produce a universal binary.
Now requires Xcode 2.2.1 or later to build.
1.0d3 01/14/2003 New sample.
// Set up a minimal set of availability macros.
// These macros are useful for conditionally compiling code targeting specific versions
// of Mac OS X. But the standard availability macros aren't available to kernel code
// prior to Mac OS X 10.5. Code targeting 10.5 and later should use AvailabilityMacros.h
// instead of this file. Code targeting 10.6 and later should use Availability.h
#define MAC_OS_X_VERSION_10_4 1040
#define MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_4
class SimpleDriverClassName : public IOService
// Declare the metaclass information that is used for runtime type checking of I/O Kit objects.
// Note that the class name is different when targeting Mac OS X 10.4 because support for that
// version has to be built as a separate kext. This is because the KPIs for 64-bit user processes
// to access user clients only exist on Mac OS X 10.5 and later.
#if MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_4
// IOService methods
virtual bool init(OSDictionary* dictionary = 0);
virtual void free(void);
virtual IOService* probe(IOService* provider, SInt32* score);
virtual bool start(IOService* provider);
virtual void stop(IOService* provider);
virtual bool willTerminate(IOService* provider, IOOptionBits options);
virtual bool didTerminate(IOService* provider, IOOptionBits options, bool* defer);
virtual bool terminate(IOOptionBits options = 0);
virtual bool finalize(IOOptionBits options);
// SimpleDriver methods
virtual IOReturn ScalarIStructI(uint32_t inNumber, MySampleStruct* inStruct, uint32_t inStructSize);
virtual IOReturn ScalarIStructO(uint32_t inNumber1, uint32_t inNumber2, MySampleStruct* outStruct, uint32_t* outStructSize);
virtual IOReturn ScalarIScalarO(uint32_t inNumber1, uint32_t inNumber2, uint32_t* outNumber);
virtual IOReturn StructIStructO(MySampleStruct* inStruct, MySampleStruct* outStruct, uint32_t inStructSize, uint32_t* outStructSize);