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24a1aaa4d8
Fixing warning revealed by GCC that I wasn't actually checking classes after init. Fixing abstract classes so that they pass their own checks! Copied from Perforce Change: 190837 ServerID: perforce.ravenbrook.com
146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/* pool.c: PROTOCOL IMPLEMENTATION
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*
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* $Id$
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* Copyright (c) 2001-2016 Ravenbrook Limited. See end of file for license.
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*
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* See design.mps.protocol.
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*/
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#include "mpm.h"
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#include "protocol.h"
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#include "classdef.h"
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SRCID(protocol, "$Id$");
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/* InstClassCheck -- check a protocol class */
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Bool InstClassCheck(InstClass class)
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{
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ClassLevel i;
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CHECKS(InstClass, class);
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CHECKL(class->name != NULL);
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CHECKL(class->level < ClassDEPTH);
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for (i = 0; i <= class->level; ++i) {
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CHECKL(class->display[i] != 0);
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CHECKL(class->display[i] < ClassIdLIMIT);
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}
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for (i = class->level + 1; i < ClassDEPTH; ++i) {
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CHECKL(class->display[i] == 0);
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}
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return TRUE;
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}
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/* InstCheck -- check a protocol instance */
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Bool InstCheck(Inst inst)
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{
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CHECKD(InstClass, inst->class);
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return TRUE;
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}
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/* The class definition for the root of the hierarchy */
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DEFINE_CLASS(Inst, Inst, theClass)
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{
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ClassLevel i;
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theClass->sig = InstClassSig;
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theClass->name = "Inst";
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theClass->superclass = theClass;
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for (i = 0; i < ClassDEPTH; ++i)
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theClass->display[i] = 0;
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theClass->level = 0;
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theClass->display[theClass->level] = ClassIdInst;
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AVERT(InstClass, theClass);
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}
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/* Superclass getters
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*
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* Use the class table to define a getter function for each class that
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* returns its superclass, in order to implement the SUPERCLASS macro
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* efficiently.
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*/
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#define CLASS_DEFINE_SUPER(UNUSED, ident, kind, super) \
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extern CLASS_TYPE(kind) CLASS_ENSURE(ident)(void); \
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CLASS_TYPE(kind) CLASS_SUPER(ident)(void) \
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{ \
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return CLASS(super); \
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}
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static void *CLASS_ENSURE(NoSuper)(void)
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{
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return NULL;
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}
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CLASSES(CLASS_DEFINE_SUPER, UNUSED)
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/* ClassOf* -- get the class of an instance */
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#define CLASS_DEFINE_CLASSOF(prefix, ident, kind, super) \
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CLASS_TYPE(kind) (prefix ## ident)(struct INST_STRUCT(ident) *inst) \
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{ \
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/* extern Bool INST_CHECK(ident)(struct INST_STRUCT(ident) *inst); */ \
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/* AVERC(ident, inst); */ \
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return (CLASS_TYPE(kind))CouldBeA(Inst, inst)->class; \
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}
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CLASSES(CLASS_DEFINE_CLASSOF, ClassOf)
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/* SetClassOf -- set the class of an instance */
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#define CLASS_DEFINE_SETCLASSOF(prefix, ident, kind, super) \
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void (prefix ## ident)(struct INST_STRUCT(ident) *inst, CLASS_TYPE(kind) class) \
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{ \
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AVERT(CLASS_TYPE(kind), class); \
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CouldBeA(Inst, inst)->class = (InstClass)class; \
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}
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CLASSES(CLASS_DEFINE_SETCLASSOF, SetClassOf)
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2016 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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