UserKernelShared.h

/*
    File:           UserKernelShared.h
 
    Description:    Definitions shared between SimpleUserClient (kernel) and SimpleUserClientTool (userland).
 
    Copyright:      Copyright © 2001-2008 Apple Inc. All rights reserved.
    
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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          Perform endian swapping when called from a user process running
                                            under Rosetta. Updated to produce a universal binary. Now requires
                                            Xcode 2.2.1 or later to build.
            
            1.0d3       01/14/2003          New sample.
 
*/
 
#if MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_4
#define SimpleDriverClassName       com_apple_dts_driver_SimpleDriver_10_4
#else
#define SimpleDriverClassName       com_apple_dts_driver_SimpleDriver
#endif
 
#define kSimpleDriverClassName      "com_apple_dts_driver_SimpleDriver"
#define kSimpleDriverClassName_10_4 "com_apple_dts_driver_SimpleDriver_10_4"
 
// Data structure passed between the tool and the user client. This structure and its fields need to have
// the same size and alignment between the user client, 32-bit processes, and 64-bit processes.
// To avoid invisible compiler padding, align fields on 64-bit boundaries when possible
// and make the whole structure's size a multiple of 64 bits.
 
typedef struct MySampleStruct {
    uint64_t field1;    
    uint64_t field2;
} MySampleStruct;
 
 
// User client method dispatch selectors.
enum {
    kMyUserClientOpen,
    kMyUserClientClose,
    kMyScalarIStructIMethod,
    kMyScalarIStructOMethod,
    kMyScalarIScalarOMethod,
    kMyStructIStructOMethod,
    kNumberOfMethods // Must be last 
};