/*
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* Copyright (C) 2010 Philippe Gerum <rpm@xenomai.org>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; 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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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include "boilerplate/hash.h"
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#include "copperplate/reference.h"
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#include "internal.h"
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static int nrefs[MAX_FNLIBS];
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struct __fnref __fnrefs[MAX_FNLIBS][MAX_FNREFS] = {
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{ { NULL, -1U } }
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};
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int __fnref_register(const char *libname,
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int libtag, int cbirev,
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const char *symname, void (*fn)(void))
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{
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unsigned int hash;
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size_t len;
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int pos;
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if ((unsigned int)libtag >= MAX_FNLIBS)
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early_panic("reference table overflow for library %s",
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libname);
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pos = nrefs[libtag]++;
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if (pos >= MAX_FNREFS)
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early_panic("too many function references in library %s (> %d)",
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libname, MAX_FNREFS);
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assert(__fnrefs[libtag][pos].fn == NULL);
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__fnrefs[libtag][pos].fn = fn;
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len = strlen(symname);
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hash = __hash_key(symname, len, 0);
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hash = __hash_key(&cbirev, sizeof(cbirev), hash);
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__fnrefs[libtag][pos].hash = hash & 0xfffff;
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return __refmangle(libtag, hash, pos);
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}
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