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212 lines
4.6 KiB
C
212 lines
4.6 KiB
C
#ifndef __DLL_H
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#define __DLL_H
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#ifdef __DLL_LIB_BUILD
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#include <exec/exec.h>
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#endif
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/************************************************************
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* External structures
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************************************************************/
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typedef struct dll_sExportSymbol
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{
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void * SymbolAddress;
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char * SymbolName;
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} dll_tExportSymbol;
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typedef struct dll_sImportSymbol
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{
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void ** SymbolPointer;
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char * SymbolName;
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char * DLLFileName;
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char * DLLPortName;
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} dll_tImportSymbol;
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#ifdef __cplusplus
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extern "C" {
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#endif
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int dllImportSymbols(void);
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void * dllLoadLibrary(char *name,char *portname);
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void dllFreeLibrary(void *hinst);
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void * dllGetProcAddress(void *hinst,char *name);
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int dllKillLibrary(char *portname);
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int DLL_Init(void);
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void DLL_DeInit(void);
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#ifdef __cplusplus
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}
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#endif
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/*
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* Prototypes for DLL implementations
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*/
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extern dll_tExportSymbol DLL_ExportSymbols[];
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extern dll_tImportSymbol DLL_ImportSymbols[];
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/************************************************************
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* Internal structures
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************************************************************/
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void *dllInternalLoadLibrary(char *filename,char *portname,int raiseusecount);
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/*
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** Typedefs for function vectors.
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** Any DLL implementor must deliver these functions.
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*/
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typedef void* (*dll_tFindResourceFn)(int, char*);
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typedef void* (*dll_tLoadResourceFn)(void*);
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typedef void (*dll_tFreeResourceFn)(void*);
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/*
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** The stack type the application using the DLL prefers.
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** If there is no support for this type in your DLL, return
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** DLLERR_StackNotSupported.
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**
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** Implementation note: In the startup code, return different
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** function pointers depending on the stack frame. This is
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** the preferred method. Some of the stack frames might be
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** identical, for example, since there is not UBYTE passing
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** on the stack for the different DLL interface functions,
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** using the same stack from for all 68k stack types is safe.
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*/
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typedef enum
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{
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DLLSTACK_STORM = 0x01, // 68k, StormC
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DLLSTACK_EGCS = 0x02, // 68k, GCC or egcs
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DLLSTACK_SAS = 0x04, // 68k, SAS/C
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DLLSTACK_VBCC = 0x08, // 68k, vbcc
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DLLSTACK_POWEROPEN = 0x10, // PPC, StormC or vbcc
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DLLSTACK_SYSV = 0x20 // PPC, egcs
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//..
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} dll_tStackType;
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#ifdef __STORM__
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#ifdef __PPC__
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#define DLLSTACK_DEFAULT DLLSTACK_POWEROPEN
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#else
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#define DLLSTACK_DEFAULT DLLSTACK_STORM
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#endif
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#else //not Storm
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#ifdef __VBCC__
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#ifdef __PPC__
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#define DLLSTACK_DEFAULT DLLSTACK_POWEROPEN
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#else
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#define DLLSTACK_DEFAULT DLLSTACK_VBCC
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#endif
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#else //not VBCC
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#ifdef __GNUC__
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#ifdef __PPC
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#define DLLSTACK_DEFAULT DLLSTACK_SYSV
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#else
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#define DLLSTACK_DEFAULT DLLSTACK_EGCS
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#endif
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#else //not GCC
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#ifdef __SASC__
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#define DLLSTACK_DEFAULT DLLSTACK_SAS
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#endif
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#endif //GCC
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#endif //VBCC
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#endif //STORMC
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#ifdef __DLL_LIB_BUILD
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typedef enum
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{
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DLLERR_NoError = 0, // No error occured
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DLLERR_StackNotSupported = 1, // Illegal stack frame
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DLLERR_OutOfMemory = 2 // Init failed due to memory shortage
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} dll_tErrorCode;
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typedef enum
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{
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DLLMTYPE_Open = 0,
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DLLMTYPE_Close = 1,
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DLLMTYPE_SymbolQuery = 2,
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DLLMTYPE_Kill = 3
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} dll_tMessageType;
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typedef struct dll_sSymbolQuery
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{
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// Preferred stack type of the main program
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dll_tStackType StackType;
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// Name of the Symbol
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char * SymbolName;
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// Where to put the Symbol Address
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void ** SymbolPointer;
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} dll_tSymbolQuery;
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/*
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*/
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typedef struct dll_sMessage
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{
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// Message for sending
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struct Message Message;
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dll_tMessageType dllMessageType;
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union
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{
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struct
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{
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// Preferred stack type of the main program
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dll_tStackType StackType;
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// Initialization error code
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dll_tErrorCode ErrorCode;
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} dllOpen;
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struct
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{
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//Empty for now
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} dllClose;
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dll_tSymbolQuery dllSymbolQuery;
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} dllMessageData;
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// ... Might grow
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} dll_tMessage;
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/*
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** This structure is returned by the LoadLibrary() call. It is strictly
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** Off-Limits for both the caller and the DLL but rather used internally
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** to for tracking resources and other stuff for the DLL. This structure
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** may change at any time.
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*/
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struct dll_sInstance
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{
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struct MsgPort *dllPort;
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dll_tStackType StackType;
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dll_tFindResourceFn FindResource;
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dll_tLoadResourceFn LoadResource;
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dll_tFreeResourceFn FreeResource;
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// ... Might grow
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};
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/************************************************************
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* Misc
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************************************************************/
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#endif // DLL_LIB_BUILD
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#ifndef HINSTANCE
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typedef void * HINSTANCE;
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#endif
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#ifdef __GNUC__
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#ifdef __PPC
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#define __saveds
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#endif
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#endif
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#endif
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