/*
**      $VER: LibInit.c 37.32 (15.5.98)
**
**      Library initializers and functions to be called by StartUp.c
**
**      (C) Copyright 1996-98 Andreas R. Kleinert
**      All Rights Reserved.
*/

#define __USE_SYSBASE        // perhaps only recognized by SAS/C

#include <exec/types.h>
#include <exec/memory.h>
#include <exec/libraries.h>
#include <exec/execbase.h>
#include <exec/resident.h>
#include <exec/initializers.h>

#ifdef __MAXON__
#include <clib/exec_protos.h>
#else
#include <proto/exec.h>
#endif
#include "compiler.h"
#include "libdefs.h"

#ifdef __GNUC__
#include "../include/example/examplebase.h"
#elif VBCC
#include "include/example/examplebase.h"
#else
#include "/include/example/examplebase.h"
#endif

ULONG __saveds __stdargs L_OpenLibs(struct LIBBASE *LIBBASE);
void  __saveds __stdargs L_CloseLibs(void);

struct ExecBase      *SysBase       = NULL;
struct IntuitionBase *IntuitionBase = NULL;
struct GfxBase       *GfxBase       = NULL;

char __aligned ExLibName [] = LIBNAME;
char __aligned ExLibID   [] = LIBID;
char __aligned Copyright [] = COPYRIGHT;


/* ------------------------------------------------------------------------
   ! ROMTag and Library inilitalization structure:
   !
   ! Below you find the ROMTag, which is the most important "magic" part of
   ! a library (as for any other resident module). You should not need to
   ! modify any of the structures directly, since all the data is referenced
   ! from constants from somewhere else.
   !
   ! You may place the ROMTag directly after the LibStart (-> StartUp.c)
   ! function as well.
   !
   ! Note, that the data initialization structure may be somewhat redundant
   ! - it's for demonstration purposes.
   !
   ! EndResident can be placed somewhere else - but it must follow the
   ! ROMTag and it must not be placed in a different SECTION.
   ------------------------------------------------------------------------
*/

extern ULONG InitTab[];
extern APTR  EndResident; /* below */

struct Resident __aligned ROMTag =     /* do not change */
{
    RTC_MATCHWORD,
    &ROMTag,
    &EndResident,
    RTF_AUTOINIT,
    VERSION,
    NT_LIBRARY,
    0,
    &ExLibName[0],
    &ExLibID[0],
    &InitTab[0]
};

APTR EndResident;

struct MyDataInit                      /* do not change */
{
    UWORD ln_Type_Init;      UWORD ln_Type_Offset;      UWORD ln_Type_Content;
    UBYTE ln_Name_Init;      UBYTE ln_Name_Offset;      ULONG ln_Name_Content;
    UWORD lib_Flags_Init;    UWORD lib_Flags_Offset;    UWORD lib_Flags_Content;
    UWORD lib_Version_Init;  UWORD lib_Version_Offset;  UWORD lib_Version_Content;
    UWORD lib_Revision_Init; UWORD lib_Revision_Offset; UWORD lib_Revision_Content;
    UBYTE lib_IdString_Init; UBYTE lib_IdString_Offset; ULONG lib_IdString_Content;
    ULONG ENDMARK;
} DataTab =
#ifdef VBCC
{
    0xe000,8,NT_LIBRARY,
    0x0080,10,(ULONG) &ExLibName[0],
    0xe000,LIBF_SUMUSED|LIBF_CHANGED,
    0xd000,20,VERSION,
    0xd000,22,REVISION,
    0x80,24,(ULONG) &ExLibID[0],
    (ULONG) 0
};
#else
{
    INITBYTE(OFFSET(Node,         ln_Type),      NT_LIBRARY),
    0x80, (UBYTE) OFFSET(Node,    ln_Name),      (ULONG) &ExLibName[0],
    INITBYTE(OFFSET(Library,      lib_Flags),    LIBF_SUMUSED|LIBF_CHANGED),
    INITWORD(OFFSET(Library,      lib_Version),  VERSION),
    INITWORD(OFFSET(Library,      lib_Revision), REVISION),
    0x80, (UBYTE) OFFSET(Library, lib_IdString), (ULONG) &ExLibID[0],
    (ULONG) 0
};
#endif


/* ------------------------------------------------------------------------
   ! L_OpenLibs:
   !
   ! Since this one is called by InitLib, libraries not shareable between
   ! Processes or libraries messing with RamLib (deadlock and crash) may
   ! not be opened here.
   !
   ! You may bypass this by calling this function fromout LibOpen, but then
   ! you will have to a) protect it by a semaphore and b) make sure, that
   ! libraries are only  opened once (when using global library bases).
   ------------------------------------------------------------------------
*/

ULONG __saveds __stdargs L_OpenLibs(struct LIBBASE *LIBBASE)
{
    SysBase = (*((struct ExecBase **) 4));

    IntuitionBase = (struct IntuitionBase *) OpenLibrary("intuition.library", 37);
    if(!IntuitionBase) return(FALSE);

    GfxBase = (struct GfxBase *) OpenLibrary("graphics.library", 37);
    if(!GfxBase) return(FALSE);


    LIBBASE->exb_IntuitionBase = IntuitionBase;

    LIBBASE->exb_GfxBase       = GfxBase;
    LIBBASE->exb_SysBase       = SysBase;

    return(TRUE);
}

/* ------------------------------------------------------------------------
   ! L_CloseLibs:
   !
   ! This one by default is called by ExpungeLib, which only can take place
   ! once and thus per definition is single-threaded.
   !
   ! When calling this fromout LibClose instead, you will have to protect
   ! it by a semaphore, since you don't know whether a given CloseLibrary
   ! (foobase) may cause a Wait(). Additionally, there should be
   ! protection, that a library won't be closed twice.
   ------------------------------------------------------------------------
*/

void __saveds __stdargs L_CloseLibs(void)
{
    if(GfxBase)       CloseLibrary((struct Library *) GfxBase);
    if(IntuitionBase) CloseLibrary((struct Library *) IntuitionBase);
}