diff options
Diffstat (limited to 'system/kernel/pdp_symbol.c')
| -rw-r--r-- | system/kernel/pdp_symbol.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/system/kernel/pdp_symbol.c b/system/kernel/pdp_symbol.c deleted file mode 100644 index 32e9e33..0000000 --- a/system/kernel/pdp_symbol.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * Pure Data Packet system implementation. : code implementing pdp's namespace (symbols) - * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <string.h> -#include <pthread.h> -#include "pdp_symbol.h" -#include "pdp_list.h" -#include "pdp_debug.h" - -// some extra prototypes -void *pdp_alloc(int size); -void pdp_dealloc(void *data); - -// the symbol hash mutex -static pthread_mutex_t pdp_hash_mutex; - -#define HASHSIZE 1024 -static t_pdp_symbol *pdp_symhash[HASHSIZE]; - - -#define LOCK pthread_mutex_lock(&pdp_hash_mutex) -#define UNLOCK pthread_mutex_unlock(&pdp_hash_mutex) - - -static void _pdp_symbol_init(t_pdp_symbol *s) -{ - memset(s, 0, sizeof(*s)); - s->s_forth.t = a_undef; -} - - -/* shamelessly copied from pd src and made thread safe */ -t_pdp_symbol *_pdp_dogensym(char *s, t_pdp_symbol *oldsym) -{ - t_pdp_symbol **sym1, *sym2; - unsigned int hash1 = 0, hash2 = 0; - int length = 0; - char *s2 = s; - while (*s2) - { - hash1 += *s2; - hash2 += hash1; - length++; - s2++; - } - sym1 = pdp_symhash + (hash2 & (HASHSIZE-1)); - - /* lock hash */ - LOCK; - - while (sym2 = *sym1) - { - if (!strcmp(sym2->s_name, s)) goto gotit; - sym1 = &sym2->s_next; - } - if (oldsym){ - sym2 = oldsym; - } - else - { - sym2 = (t_pdp_symbol *)pdp_alloc(sizeof(*sym2)); - _pdp_symbol_init(sym2); - sym2->s_name = pdp_alloc(length+1); - sym2->s_next = 0; - strcpy(sym2->s_name, s); - } - *sym1 = sym2; - - gotit: - - /* unlock hash */ - UNLOCK; - return (sym2); -} - -t_pdp_symbol *pdp_gensym(char *s) -{ - return(_pdp_dogensym(s, 0)); -} - - -/* connect a parsed typelist to a symbol type name - 1 = succes, 0 = error (symbol already connected) */ -int pdp_symbol_set_typelist(t_pdp_symbol *s, t_pdp_list *typelist) -{ - int status = 0; - LOCK; - if (!s->s_type){ - s->s_type = typelist; - status = 1; - } - UNLOCK; - return status; -} - - -void pdp_symbol_apply_all(t_pdp_symbol_iterator it) -{ - int i; - for (i=0; i<HASHSIZE; i++){ - t_pdp_symbol *s; - for (s = pdp_symhash[i]; s; s=s->s_next){ - it(s); - } - - } -} - -t_pdp_symbol _pdp_sym_wildcard; -t_pdp_symbol _pdp_sym_float; -t_pdp_symbol _pdp_sym_int; -t_pdp_symbol _pdp_sym_symbol; -t_pdp_symbol _pdp_sym_packet; -t_pdp_symbol _pdp_sym_pointer; -t_pdp_symbol _pdp_sym_invalid; -t_pdp_symbol _pdp_sym_list; -t_pdp_symbol _pdp_sym_question_mark; -t_pdp_symbol _pdp_sym_atom; -t_pdp_symbol _pdp_sym_null; -t_pdp_symbol _pdp_sym_quote_start; -t_pdp_symbol _pdp_sym_quote_end; -t_pdp_symbol _pdp_sym_return; -t_pdp_symbol _pdp_sym_nreturn; -t_pdp_symbol _pdp_sym_defstart; -t_pdp_symbol _pdp_sym_defend; -t_pdp_symbol _pdp_sym_if; -t_pdp_symbol _pdp_sym_then; -t_pdp_symbol _pdp_sym_local; -t_pdp_symbol _pdp_sym_forth; -t_pdp_symbol _pdp_sym_call; -t_pdp_symbol _pdp_sym_push; -t_pdp_symbol _pdp_sym_pop; - -static void _sym(char *name, t_pdp_symbol *s) -{ - t_pdp_symbol *realsym; - _pdp_symbol_init(s); - s->s_name = name; - realsym = _pdp_dogensym(name, s); - PDP_ASSERT(realsym == s); // if this fails, the symbol was already defined -} - -void pdp_symbol_setup(void) -{ - // create mutexes - pthread_mutex_init(&pdp_hash_mutex, NULL); - - // init symbol hash - memset(pdp_symhash, 0, HASHSIZE * sizeof(t_pdp_symbol *)); - - // setup predefined symbols (those that have direct pointer access for speedup) - _sym("*", &_pdp_sym_wildcard); - _sym("float", &_pdp_sym_float); - _sym("int", &_pdp_sym_int); - _sym("symbol", &_pdp_sym_symbol); - _sym("packet", &_pdp_sym_packet); - _sym("pointer", &_pdp_sym_pointer); - _sym("invalid", &_pdp_sym_invalid); - _sym("list", &_pdp_sym_list); - _sym("?", &_pdp_sym_question_mark); - _sym("atom", &_pdp_sym_atom); - _sym("null", &_pdp_sym_null); - _sym("[", &_pdp_sym_quote_start); - _sym("]", &_pdp_sym_quote_end); - _sym("ret", &_pdp_sym_return); - _sym("nret", &_pdp_sym_nreturn); - _sym(":", &_pdp_sym_defstart); - _sym(";", &_pdp_sym_defend); - _sym("if", &_pdp_sym_if); - _sym("then", &_pdp_sym_then); - _sym("local", &_pdp_sym_local); - _sym("forth", &_pdp_sym_forth); - _sym("call", &_pdp_sym_call); - _sym("push", &_pdp_sym_push); - _sym("pop", &_pdp_sym_pop); - -} - - |