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MixedMode.idl
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/*
File: MixedMode.idl
Contains: Mixed Mode Manager Interfaces.
Version: Technology: System 7.5
Release: Universal Interfaces 3.0d3 on Copland DR1
Copyright: © 1984-1996 by Apple Computer, Inc. All rights reserved.
Bugs?: If you find a problem with this file, send the file and version
information (from above) and the problem description to:
Internet: apple.bugs@applelink.apple.com
AppleLink: APPLE.BUGS
*/
#ifndef __MIXEDMODE_IDL__
#define __MIXEDMODE_IDL__
#include <somobj.idl>
#include <somcls.idl>
#ifndef __TYPES_IDL__
#include <Types.idl>
#endif
#ifdef __SOMIDL__
#if FOR_SYSTEM7_AND_SYSTEM8_COOPERATIVE
/* Mixed Mode constants */
/* Current Routine Descriptor Version */
/* MixedModeMagic Magic Cookie/Trap number */
/* Calling Conventions */
typedef unsigned short CallingConventionType;
/* ISA Types */
typedef SInt8 ISAType;
/* RTA Types */
typedef SInt8 RTAType;
/* Constants for specifing 68k registers */
typedef unsigned short registerSelectorType;
/* SizeCodes we use everywhere */
/* Mixed Mode Routine Records */
typedef unsigned long ProcInfoType;
/* Routine Flag Bits */
typedef unsigned short RoutineFlagsType;
#endif
#if FOR_SYSTEM7_AND_SYSTEM8_COOPERATIVE
typedef SOMLargeStruct RoutineRecord; /* Derived from a struct of 20 bytes in size */
typedef OpaquePtr RoutineRecordPtr; /* Substituted OpaquePtr for ``RoutineRecord*'' */
typedef OpaquePtr RoutineRecordHandle; /* Substituted OpaquePtr for ``RoutineRecordPtr*'' */
/* Mixed Mode Routine Descriptors */
/* Definitions of the Routine Descriptor Flag Bits */
typedef UInt8 RDFlagsType;
/* Routine Descriptor Structure */
typedef SOMLargeStruct RoutineDescriptor; /* Derived from a struct of 32 bytes in size */
typedef OpaquePtr RoutineDescriptorPtr; /* Substituted OpaquePtr for ``RoutineDescriptor*'' */
typedef OpaquePtr RoutineDescriptorHandle; /* Substituted OpaquePtr for ``RoutineDescriptorPtr*'' */
#endif
#if FOR_SYSTEM7_AND_SYSTEM8_DEPRECATED
#endif
#if FOR_SYSTEM7_AND_SYSTEM8_COOPERATIVE
/* Mixed Mode ProcInfos */
#endif
#if FOR_SYSTEM7_AND_SYSTEM8_COOPERATIVE
/*
NOTES ON USING ROUTINE DESCRIPTOR FUNCTIONS
When calling these routine from classic 68k code there are two possible intentions.
The first is source compatibility with code ported to CFM (either PowerPC or 68k CFM). When
the code is compiled for CFM the functions create routine descriptors that can be used by
the mixed mode manager operating on that machine. When the code is compiled for classic 68k
these functions do nothing so that the code will run on Macintoshes that do not have a
mixed mode manager. The dual nature of these functions is achieved by turning the CFM calls
into "no-op" macros for classic 68k: You can put "NewRoutineDescriptor" in your source,
compile it for any runtime or instruction set architecture, and it will run correctly on the
intended runtime/instruction platform. All without source changes and/or conditional source.
The other intention is for code that "knows" that it is executing as classic 68k runtime
and is specifically trying to call code of another architecture using mixed mode. Since the
routines were designed with classic <-> CFM source compatibility in mind this second case
is treated special. For classic 68k code to create routines descriptors for use by mixed mode
it must call the "Trap" versions of the routines (NewRoutineDescriptorTrap). These versions
are only available to classic 68k callers: rigging the interfaces to allow calling them
from CFM code will result in runtime failure because no shared library implements or exports
the functions.
This almost appears seamless until you consider "fat" routine descriptors and the advent of
CFM-68K. What does "fat" mean? CFM-68K is not emulated on PowerPC and PowerPC is not emulated
on CFM-68K. It makes no sense to create a routine descriptor having both a CFM-68K routine
and a PowerPC native routine pointer. Therefore "fat" is defined to be a mix of classic and
CFM for the hardware's native instruction set: on PowerPC fat is classic and PowerPC native,
on a 68k machine with CFM-68K installed fat is classic and CFM-68K.
By definition fat routine descriptors are only constructed by code that is aware of the
architecture it is executing as and that another architecture exists. Source compatibility
between code intented as pure classic and pure CFM is not an issue and so NewFatRoutineDescriptor
is not available when building pure classic code.
NewFatRoutineDescriptorTrap is available to classic code on both PowerPC and CFM-68K. The
classic code can use the code fragment manager routine "FindSymbol" to obtain the address of
a routine in a shared library and then construct a routine descriptor with both the CFM routine
and classic routine.
*/
#if GENERATINGCFM
#else
/* Note that the call to NewFatRoutineDescriptor is undefined when GENERATINGCFM is false. */
#endif
#if GENERATINGCFM
/*
CallUniversalProc is only implemented in shared libraries on 68k and PowerPC, it is now
conditionalize with GENERATINGCFM. This will catch accidental calls from classic 68K code
that previously only showed up as linker errors.
*/
#endif
#endif
/* Macros for building ProcInfos */
/*
* * * * * * * * * * * * * *
* SIZE_CODE - Return the size code for an object, given its size in bytes.
* size - size of an object in bytes
*/
/*
* * * * * * * * * * * * * *
* RESULT_SIZE - Return the result field of a ProcInfo, given the return object's size.
* This is the same for all ProcInfos
* sizeCode - size code
*/
/*
* * * * * * * * * * * * * *
* STACK_ROUTINE_PARAMETER - Return a parameter field of a ProcInfo, for a simple,
* non-dispatched, stack based routine.
* whichParam - which parameter
* sizeCode - size code
*/
/*
* * * * * * * * * * * * * *
* DISPATCHED_STACK_ROUTINE_PARAMETER - Return a parameter field of a ProcInfo, for
* a dispatched, stack based routine. The same
* macro is used regardless of the type of
* dispatching.
* whichParam - which parameter
* sizeCode - size code
*/
/*
* * * * * * * * * * * * * *
* DISPATCHED_STACK_ROUTINE_SELECTOR_SIZE - Return a the selector size field of a ProcInfo
* for a dispatched, stack based routine. The
* same macro is used regardless of the type of
* dispatching.
* sizeCode - size code
*/
/*
* * * * * * * * * * * * * *
* REGISTER_RESULT_LOCATION - Return the Result Location field of a ProcInfo,
* given the location.
* whichReg - which register
*/
/*
* * * * * * * * * * * * * *
* REGISTER_ROUTINE_PARAMETER - Return a parameter field of a ProcInfo for a
* register based routine.
*/
/*
* * * * * * * * * * * * * *
*
* SPECIAL_CASE_PROCINFO - Returns the procInfo constant for the following special cases:
*
* High Hook & Caret Hook - (see I-379)
* C calling conventions, Rect on stack, pointer in A3, no return value
* EOL Hook - (see VI-15-26)
* Register-based; inputs in D0, A3, A4;
* output is Z flag of status register
* Width Hook - (see VI-15-27)
* Register-based; inputs in D0, D1, A0, A3, A4; output in D1
* NWidth Hook - (see VI-15-27)
* Register-based; inputs in D0, D1, D2, A0, A2, A3, A4; output in D1
* TextWidthHook - (see VI-15-28)
* Register-based; inputs in D0, D1, A0, A3, A4; output in D1
* DrawHook - (see VI-15-28)
* Register-based; inputs in D0, D1, A0, A3, A4; no output
* HitTestHook - (See VI-15-29)
* Register-based; inputs in D0, D1, D2, A0, A3, A4; outputs in D0, D1, D2
* FindWord - (see VI-15-30)
* Register-based; inputs in D0, D2, A3, A4; outputs in D0, D1
* ADBRoutines - (see V-371)
* Register-based; inputs in A0, A1, A2, D0; no outputs
* ProtocolHandler - (see II-326)
* Register-based; inputs in A0, A1, A2, A3, A4, D1.w; output in Z
* SocketListener - (see II-329)
* Register-based; inputs in A0, A1, A2, A3, A4, D0.b, D1.w; output in Z
* Reclac - (see I-391)
* Register-based; inputs in A3, D7; outputs in D2, D3, D4
* DoText - (see I-391)
* Register-based; inputs in A3, D3, D4, D7; outputs in A0, D0
* GNEFilterProc - (see tech note 85)
* Register & Stack Based; inputs in A1, D0 & on the stack; outputs on the stack
* MenuBarHook - (see I-356)
* Register & Stack Based; input on the stack; output in D0
*/
#endif /* __SOMIDL__ */
#endif /* __MIXEDMODE_IDL__ */