106 lines
2.9 KiB
C++
106 lines
2.9 KiB
C++
#ifndef __pointers_H
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#define __pointers_H
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/*
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* Copyright (c) 2001 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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/*
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* This header file describes the various "pointer" integral types
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* that are used in vvp, along with functions that can be used to
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* manipulate those pointers.
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*/
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# include "config.h"
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/*
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* The vvp_ipoint_t is a 32bit integer that encodes the address of a
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* functor input port.
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*
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* The typedef below gets the type properly declared as an integral
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* type that is big enough. The config.h header file has the defines
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* needed for the following pre-processor magic to work.
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*/
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# if SIZEOF_UNSIGNED >= 4
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typedef unsigned vvp_ipoint_t;
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#elif SIZEOF_UNSIGNED_LONG >= 4
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typedef unsigned long vvp_ipoint_t;
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#else
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#error "I need an unsigned type that is 32 bits!"
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#endif
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/*
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* This is a native-pointer version of the vvp_ipoint_t
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*/
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typedef struct functor_s *functor_t;
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/*
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* Given a functor generic address and a desired port, this function
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* makes a complete vvp_ipoint_t that points to the port of the given
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* functor. The The result points to the same functor as the input
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* pointer, but addresses the supplied port instead.
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*/
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inline vvp_ipoint_t ipoint_make(vvp_ipoint_t func, unsigned port)
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{
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return (func & ~3) | (port & 3);
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}
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/*
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* This implements pointer arithmetic for vvp_point_t pointers. Add
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* the given index to the functor part of the pointer.
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*/
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inline vvp_ipoint_t ipoint_index(vvp_ipoint_t base, unsigned idx)
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{
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return base + (idx<<2);
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}
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/*
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* Return the ipoint of an input into a multi-functor input vector.
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*/
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inline vvp_ipoint_t ipoint_input_index(vvp_ipoint_t base, unsigned idx)
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{
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return (base & ~3) + idx;
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}
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/*
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* This function returns the port index of a functor given a complete
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* vvp_ipoint_t pointer.
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*/
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inline unsigned ipoint_port(vvp_ipoint_t func)
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{
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return func & 3;
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}
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/*
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* The functor event mode uses a pointer of this type to point to the
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* extended event data.
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*/
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typedef struct event_functor_s *vvp_event_t;
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typedef struct vthread_s*vthread_t;
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/* vector of functors */
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typedef struct vvp_fvector_s *vvp_fvector_t;
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/* Forward declarations. */
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class vvp_delay_t;
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#endif
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