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- /*
- * LIB.C
- *
- * Basic Library Resource Handling
- *
- * NOTE: all data declarations should be initialized since we skip
- * normal C startup code (unless initial value is don't care)
- *
- * WARNING: arguments are passed in certain registers from the assembly
- * tag file, matched to how they are declared below. Do not change
- * the argument declarations!
- */
-
- #include "DEV_IE:Generators/defs.h"
- #include "Protos.h"
-
- extern struct Library *LibInit ( __A0 BPTR );
- extern struct Library *LibOpen ( __D0 long, __A0 struct Library * );
- extern long LibClose ( __A0 struct Library * );
- extern long LibExpunge( __A0 struct Library * );
-
- struct Library *LibBase = NULL;
-
- long SysBase = NULL;
- long DOSBase = NULL;
- long IntuitionBase = NULL;
- long GfxBase = NULL;
- long ReqToolsBase = NULL;
- long GadToolsBase = NULL;
- BPTR SegList = 0;
-
- /*
- * The Initialization routine is given only a seglist pointer. Since
- * we are NOT AUTOINIT we must construct and add the library ourselves
- * and return either NULL or the library pointer. Exec has Forbid()
- * for us during the call.
- */
-
- struct Library *LibInit( __A0 BPTR segment )
- {
-
- struct Library *lib = NULL;
-
- static const long Vectors[] = {
-
- (long)ALibOpen,
- (long)ALibClose,
- (long)ALibExpunge,
- (long)ALibReserved,
-
- (long)OpenFiles,
- (long)CloseFiles,
- (long)WriteHeaders,
- (long)WriteVars,
- (long)WriteData,
- (long)WriteStrings,
- (long)WriteChipData,
- (long)WriteCode,
- (long)Config,
- -1
- };
-
- SysBase = *(long *)4;
-
- if( DOSBase = OpenLibrary( "dos.library", 36 )) {
- if( IntuitionBase = OpenLibrary( "intuition.library", 36 )) {
- if( GfxBase = OpenLibrary( "graphics.library", 36 )) {
- if( GadToolsBase = OpenLibrary( "gadtools.library", 36 )) {
- if( ReqToolsBase = OpenLibrary( "reqtools.library", 37 )) {
-
- if( LibBase = lib = MakeLibrary( (APTR)Vectors, NULL, NULL, sizeof(struct Generator), NULL )) {
-
- lib->lib_Node.ln_Type = NT_LIBRARY;
- lib->lib_Node.ln_Name = LibName;
- lib->lib_Flags = LIBF_CHANGED | LIBF_SUMUSED;
- lib->lib_Version = 37;
- lib->lib_Revision = 18;
- lib->lib_IdString = (APTR)LibId;
-
- ((struct Generator *)lib)->Ext = "c";
- ((struct Generator *)lib)->Pattern = "#?.c";
-
- LoadPrefs();
-
- SegList = segment;
-
- AddLibrary( lib );
- }
-
- }
- }
- }
- }
- }
-
- return( lib );
- }
-
- /*
- * Open is given the library pointer and the version request. Either
- * return the library pointer or NULL. Remove the DELAYED-EXPUNGE flag.
- * Exec has Forbid() for us during the call.
- */
-
- struct Library *LibOpen( __D0 long version, __A0 struct Library *lib )
- {
- ++lib->lib_OpenCnt;
-
- lib->lib_Flags &= ~LIBF_DELEXP;
-
- return( lib );
- }
-
- /*
- * Close is given the library pointer and the version request. Be sure
- * not to decrement the open count if already zero. If the open count
- * is or becomes zero AND there is a LIBF_DELEXP, we expunge the library
- * and return the seglist. Otherwise we return NULL.
- *
- * Note that this routine never sets LIBF_DELEXP on its own.
- *
- * Exec has Forbid() for us during the call.
- */
-
- long LibClose( __A0 struct Library *lib )
- {
- if( lib->lib_OpenCnt && --lib->lib_OpenCnt )
- return( NULL );
-
- if( lib->lib_Flags & LIBF_DELEXP )
- return( LibExpunge( lib ));
-
- return( NULL );
- }
-
- /*
- * We expunge the library and return the Seglist ONLY if the open count
- * is zero. If the open count is not zero we set the DELAYED-EXPUNGE
- * flag and return NULL.
- *
- * Exec has Forbid() for us during the call. NOTE ALSO that Expunge
- * might be called from the memory allocator and thus we CANNOT DO A
- * Wait() or otherwise take a long time to complete (straight from RKM).
- *
- * Apparently RemLibrary(lib) calls our expunge routine and would
- * therefore freeze if we called it ourselves. As far as I can tell
- * from RKM, LibExpunge(lib) must remove the library itself as shown
- * below.
- */
-
- long LibExpunge( __A0 struct Library *lib )
- {
- if( lib->lib_OpenCnt ) {
-
- lib->lib_Flags |= LIBF_DELEXP;
- return( NULL );
- }
-
- Remove( &lib->lib_Node );
-
- FreeMem(( char * )lib - lib->lib_NegSize, lib->lib_NegSize + lib->lib_PosSize );
-
- if( DOSBase ) {
- CloseLibrary( (struct Library *)DOSBase );
- DOSBase = NULL;
- }
-
- if( IntuitionBase ) {
- CloseLibrary( (struct Library *)IntuitionBase );
- IntuitionBase = NULL;
- }
-
- if( GfxBase ) {
- CloseLibrary( (struct Library *)GfxBase );
- GfxBase = NULL;
- }
-
- if( GadToolsBase ) {
- CloseLibrary( (struct Library *)GadToolsBase );
- GadToolsBase = NULL;
- }
-
- if( ReqToolsBase ) {
- CloseLibrary( (struct Library *)ReqToolsBase );
- ReqToolsBase = NULL;
- }
-
- return(( long )SegList );
- }
-