{ This file is part of the Free Pascal run time library. Copyright (c) 2001 by Free Pascal development team This file implements all the base types and limits required for a minimal POSIX compliant subset required to port the compiler to a new OS. See the file COPYING.FPC, included in this distribution, for details about the copyright. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. **********************************************************************} {***************************************************************************** Heap Management *****************************************************************************} function SysOSAlloc (size: ptruint): pointer; var regs : Registers; nb_para : longint; begin {$ifdef DEBUG_TINY_HEAP} writeln('SysOSAlloc called size=',size); {$endif} {$if defined(FPC_X86_DATA_FAR) or defined(FPC_X86_DATA_HUGE)} regs.ax:=$4800; nb_para:=size div 16; if nb_para > $ffff then result:=nil else begin regs.bx:=nb_para; msdos(regs); if (regs.Flags and fCarry) <> 0 then begin {$ifdef DEBUG_TINY_HEAP} writeln('SysOSAlloc failed, err = ',regs.AX); {$endif} GetInOutRes(regs.AX); Result := nil; end else begin result:=ptr(regs.ax,0); {$ifdef DEBUG_TINY_HEAP} writeln('SysOSAlloc returned= $',hexstr(seg(result),4),':$',hexstr(ofs(result),4)); {$endif} end; end; {$else not DATA_FAR} Result := nil; {$endif not DATA_FAR} end; procedure SysOSFree(p: pointer; size: ptruint); begin end;