pike.git/src/mapping.c:53bb63286128d832391e278a358a2ad020e6dd84

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1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 /*\ ||| This file a part of Pike, and is copyright by Fredrik Hubinette ||| Pike is distributed as GPL (General Public License) ||| See the files COPYING and DISCLAIMER for more information. \*/ /**/ #include "global.h" RCSID("$Id: mapping.c,v 1.65 2000/02/09 23:49:17 hubbe Exp $"); #include "main.h" #include "object.h" #include "mapping.h" #include "svalue.h" #include "array.h" #include "pike_macros.h" #include "language.h" #include "error.h" #include "pike_memory.h" #include "dynamic_buffer.h" #include "interpret.h" #include "las.h" #include "gc.h" #include "stralloc.h" #include "security.h" #include "block_alloc.h" #define AVG_LINK_LENGTH 4 #define MIN_LINK_LENGTH 1 #define MAP_SLOTS(X) ((X)?((X)+((X)>>4)+8):0) struct mapping *first_mapping; #define unlink_mapping_data(M) do{ \ struct mapping_data *md_=(M); \ if(md_->hardlinks) { md_->hardlinks--; md_->valrefs--; } \ free_mapping_data(M); \ }while(0) #define MD_KEYPAIRS(MD, HSIZE) \ ( (struct keypair *)DO_ALIGN( (long) (((struct mapping_data *)(MD))->hash + HSIZE), ALIGNOF(struct keypair)) ) #define MAPPING_DATA_SIZE(HSIZE, KEYPAIRS) \ (long)( MD_KEYPAIRS(0, HSIZE) + KEYPAIRS ) #undef EXIT_BLOCK #define EXIT_BLOCK(m) \ INT32 e; \ DO_IF_DEBUG( \ if(m->refs) \ fatal("really free mapping on mapping with nonzero refs.\n"); \ ) \ \ FREE_PROT(m); \ \ unlink_mapping_data(m->data); \ \ if(m->prev) \ m->prev->next = m->next; \ else \ first_mapping = m->next; \ \ if(m->next) m->next->prev = m->prev; \ \ GC_FREE(); #undef COUNT_OTHER #define COUNT_OTHER() do{ \ struct mapping *m; \ for(m=first_mapping;m;m=m->next) \ { \ num++; \ size+=MAPPING_DATA_SIZE(m->data->hashsize, m->data->num_keypairs); \ } \ }while(0) BLOCK_ALLOC(mapping, 511) #ifdef PIKE_DEBUG /* This function checks that the type field isn't lacking any bits. * It is used for debugging purposes only. */ static void check_mapping_type_fields(struct mapping *m) { INT32 e; struct keypair *k=0,**prev; TYPE_FIELD ind_types, val_types; ind_types=val_types=0; MAPPING_LOOP(m) { val_types |= 1 << k->val.type; ind_types |= 1 << k->ind.type; } if(val_types & ~(m->data->val_types)) fatal("Mapping value types out of order!\n"); if(ind_types & ~(m->data->ind_types)) fatal("Mapping indices types out of order!\n"); } #endif static struct mapping_data empty_data = { 1, 1, 0,0,0,0,0 }; /* This function allocates the hash table and svalue space for a mapping * struct. The size is the max number of indices that can fit in the * allocated space. */ static void init_mapping(struct mapping *m, INT32 size) { struct mapping_data *md; char *tmp; INT32 e; INT32 hashsize; debug_malloc_touch(m); #ifdef PIKE_DEBUG if(size < 0) fatal("init_mapping with negative value.\n"); #endif if(size) { hashsize=size / AVG_LINK_LENGTH + 1; if(!(hashsize & 1)) hashsize++; e=MAPPING_DATA_SIZE(hashsize, size); md=(struct mapping_data *)xalloc(e); m->data=md; md->hashsize=hashsize; MEMSET((char *)md->hash, 0, sizeof(struct keypair *) * md->hashsize); md->free_list=MD_KEYPAIRS(md, hashsize); for(e=1;e<size;e++) { md->free_list[e-1].next = md->free_list + e; md->free_list[e-1].ind.type=T_INT; md->free_list[e-1].val.type=T_INT; } md->free_list[e-1].next=0; md->free_list[e-1].ind.type=T_INT; md->free_list[e-1].val.type=T_INT; md->ind_types = 0; md->val_types = 0; md->size = 0; md->refs=0; md->valrefs=0; md->hardlinks=0; md->num_keypairs=size; }else{ md=&empty_data; } add_ref(md); m->data=md; #ifdef PIKE_DEBUG m->debug_size = md->size; #endif } /* This function allocates an empty mapping with room for 'size' values */ struct mapping *debug_allocate_mapping(int size) { struct mapping *m; GC_ALLOC(); m=alloc_mapping(); INITIALIZE_PROT(m); init_mapping(m,size); m->next = first_mapping; m->prev = 0; m->refs = 1; m->flags = 0; if(first_mapping) first_mapping->prev = m; first_mapping=m; return m; } void really_free_mapping_data(struct mapping_data *md) { INT32 e; struct keypair *k; debug_malloc_touch(md); #ifdef PIKE_DEBUG if (md->refs) { fatal("really_free_mapping_data(): md has non-zero refs: %d\n", md->refs); } #endif /* PIKE_DEBUG */ NEW_MAPPING_LOOP(md) { free_svalue(& k->val); free_svalue(& k->ind); } free((char *) md); } /* This function is used to rehash a mapping without loosing the internal * order in each hash chain. This is to prevent mappings from becoming * inefficient just after being rehashed. */ static void mapping_rehash_backwards_evil(struct mapping_data *md, struct keypair *from) { unsigned INT32 h; struct keypair *tmp; struct keypair *k; if(!from) return; mapping_rehash_backwards_evil(md,from->next); /* unlink */ k=md->free_list; #ifdef PIKE_DEBUG if(!k) fatal("Error in rehash: not enough kehypairs.\n"); #endif md->free_list=k->next; /* initialize */ *k=*from; /* link */ h=k->hval; h%=md->hashsize; k->next=md->hash[h]; md->hash[h]=k; /* update */ md->ind_types |= 1<< (k->ind.type); md->val_types |= 1<< (k->val.type); md->size++; } static void mapping_rehash_backwards_good(struct mapping_data *md, struct keypair *from) { unsigned INT32 h; struct keypair *tmp; struct keypair *k; if(!from) return; mapping_rehash_backwards_good(md,from->next); /* unlink */ k=md->free_list; #ifdef PIKE_DEBUG if(!k) fatal("Error in rehash: not enough kehypairs.\n"); #endif md->free_list=k->next; /* initialize */ k->hval=from->hval; assign_svalue_no_free(&k->ind, &from->ind); assign_svalue_no_free(&k->val, &from->val); /* link */ h=k->hval; h%=md->hashsize; k->next=md->hash[h]; md->hash[h]=k; /* update */ md->ind_types |= 1<< (k->ind.type); md->val_types |= 1<< (k->val.type); md->size++; } /* This function re-allocates a mapping. It adjusts the max no. of * values can be fitted into the mapping. It takes a bit of time to * run, but is used seldom enough not to degrade preformance significantly. */ static struct mapping *rehash(struct mapping *m, int new_size) { struct mapping_data *md, *new_md; #ifdef PIKE_DEBUG INT32 tmp=m->data->size; #endif INT32 e; md=m->data; #ifdef PIKE_DEBUG if(md->refs <=0) fatal("Zero refs in mapping->data\n"); if(d_flag>1) check_mapping(m); #endif init_mapping(m, new_size); debug_malloc_touch(m); new_md=m->data; /* This operation is now 100% atomic - no locking required */ if(md->refs>1) { /* good */ for(e=0;e<md->hashsize;e++) mapping_rehash_backwards_good(new_md, md->hash[e]); unlink_mapping_data(md); }else{ /* evil */ for(e=0;e<md->hashsize;e++) mapping_rehash_backwards_evil(new_md, md->hash[e]); free((char *)md); } #ifdef PIKE_DEBUG if(m->data->size != tmp) fatal("Rehash failed, size not same any more.\n"); m->debug_size = m->data->size; #endif #ifdef PIKE_DEBUG if(d_flag>1) check_mapping(m); #endif return m; } /* * No need for super efficiency, should not be called very often * -Hubbe */ #define LOW_RELOC(X) X= (void *) ((char *)(X) + off); #define RELOC(X) if(X) LOW_RELOC(X) struct mapping_data *copy_mapping_data(struct mapping_data *md) { long off,size,e; struct mapping_data *nmd; struct keypair *keypairs; debug_malloc_touch(md); size=MAPPING_DATA_SIZE(md->hashsize, md->num_keypairs); nmd=(struct mapping_data *)xalloc(size); MEMCPY(nmd, md, size); off=((char *)nmd) - ((char *)md); RELOC(nmd->free_list); for(e=0;e<nmd->hashsize;e++) RELOC(nmd->hash[e]); keypairs=MD_KEYPAIRS(nmd, nmd->hashsize); for(e=0;e<nmd->num_keypairs;e++) { RELOC(keypairs[e].next); add_ref_svalue(& keypairs[e].ind); add_ref_svalue(& keypairs[e].val); } nmd->refs=1; nmd->valrefs=0; nmd->hardlinks=0; if(md->hardlinks) { #ifdef PIKE_DEBUG if(md->refs <= 0 || md->valrefs<=0) fatal("Hardlink without refs/valrefs!\n"); #endif md->hardlinks--; md->valrefs--; } md->refs--; return nmd; } #define LOW_FIND(FUN, KEY, FOUND, NOT_FOUND) do { \ md=m->data; \ add_ref(md); \ if(md->hashsize) \ { \ h=h2 % md->hashsize; \ DO_IF_DEBUG( if(d_flag > 1) check_mapping_type_fields(m); ) \ if(md->ind_types & (1 << key->type)) \ { \ for(prev= md->hash + h;(k=*prev);prev=&k->next) \ { \ if(h2 == k->hval && FUN(& k->ind, KEY)) \ { \ FOUND; \ } \ } \ } \ } \ NOT_FOUND; \ }while(0) #define LOW_FIND2(FUN, KEY, FOUND, NOT_FOUND) do { \ struct keypair *k2; \ md=m->data; \ add_ref(md); \ if(md->hashsize) \ { \ h=h2 % md->hashsize; \ DO_IF_DEBUG( if(d_flag > 1) check_mapping_type_fields(m); ) \ if(md->ind_types & (1 << key->type)) \ { \ k2=omd->hash[h2 % md->hashsize]; \ prev= md->hash + h; \ for(;(k=*prev) && k2;(prev=&k->next),(k2=k2->next)) \ if(!(h2 == k->hval && is_identical(&k2->ind, &k->ind))) \ break; \ for(;(k=*prev);prev=&k->next) \ { \ if(FUN(& k->ind, KEY)) \ { \ FOUND; \ } \ } \ } \ } \ NOT_FOUND; \ }while(0) #define SAME_DATA(SAME,NOT_SAME) \ if(m->data == md) \ { \ SAME; \ }else{ \ NOT_SAME; \ } /* FIXME: the 'no action' might need to be fixed.... */ #define FIND() do{ \ LOW_FIND(is_eq, key, \ omd=md; \ SAME_DATA( break, \ struct svalue *tmp=&k->ind; \ LOW_FIND(is_identical, tmp, break, ;); \ free_mapping_data(omd)), \ break); \ free_mapping_data(md); \ }while(0) /* Assumes md is *NOT* locked */ #define COPYMAP2() do { \ long off; \ m->data=copy_mapping_data(m->data); \ debug_malloc_touch(m->data); \ DO_IF_DEBUG( if(d_flag>1) check_mapping(m); ) \ off=((char *)m->data)-((char *)md); \ LOW_RELOC(k); \ LOW_RELOC(prev); \ md=m->data; \ }while(0) #define PREPARE_FOR_DATA_CHANGE2() \ if(md->valrefs) COPYMAP2() #define PREPARE_FOR_INDEX_CHANGE2() \ if(md->refs>1) COPYMAP2() #define PROPAGATE() do { \ if(md->refs==1) \ { \ h=h2 % md->hashsize; \ *prev=k->next; \ k->next=md->hash[h]; \ md->hash[h]=k; \ } \ }while(0) /* Assumes md is locked */ #define COPYMAP() do { \ long off; \ m->data=copy_mapping_data(m->data); \ debug_malloc_touch(m->data); \ off=((char *)m->data)-((char *)md); \ LOW_RELOC(k); \ free_mapping_data(md); \ md=m->data; \ md->refs++; \ }while(0) #define PREPARE_FOR_DATA_CHANGE() \ if(md->valrefs) COPYMAP() #define PREPARE_FOR_INDEX_CHANGE() \ if(md->refs>1) COPYMAP() /* This function brings the type fields in the mapping up to speed. * I only use it when the type fields MUST be correct, which is not * very often. */ void mapping_fix_type_field(struct mapping *m) { INT32 e; struct keypair *k; TYPE_FIELD ind_types, val_types; val_types = ind_types = 0; NEW_MAPPING_LOOP(m->data) { val_types |= 1 << k->val.type; ind_types |= 1 << k->ind.type; } #ifdef PIKE_DEBUG if(val_types & ~(m->data->val_types)) fatal("Mapping value types out of order!\n"); if(ind_types & ~(m->data->ind_types)) fatal("Mapping indices types out of order!\n"); #endif m->data->val_types = val_types; m->data->ind_types = ind_types; } /* This function inserts key:val into the mapping m. * Same as doing m[key]=val; in pike. */ void low_mapping_insert(struct mapping *m, struct svalue *key, struct svalue *val, int overwrite) { unsigned INT32 h,h2; struct keypair *k, **prev; struct mapping_data *md, *omd; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif h2=hash_svalue(key); #ifdef PIKE_DEBUG if(d_flag>1) check_mapping(m); #endif LOW_FIND(is_eq, key, struct svalue *tmp=&k->ind; SAME_DATA(goto mi_set_value, omd=md; LOW_FIND(is_identical, tmp, free_mapping_data(omd); goto mi_set_value, free_mapping_data(omd); goto mi_do_nothing)), Z: SAME_DATA(goto mi_insert, omd=md; LOW_FIND2(is_eq, key, free_mapping_data(omd); goto mi_do_nothing, free_mapping_data(omd); goto Z))); mi_do_nothing: free_mapping_data(md); return; mi_set_value: #ifdef PIKE_DEBUG if(m->data != md) fatal("Wrong dataset in mapping_insert!\n"); if(d_flag>1) check_mapping(m); #endif free_mapping_data(md); if(!overwrite) return; PREPARE_FOR_DATA_CHANGE2(); PROPAGATE(); /* propagate after preparing */ md->val_types |= 1 << val->type; assign_svalue(& k->val, val); #ifdef PIKE_DEBUG if(d_flag>1) check_mapping(m); #endif return; mi_insert: #ifdef PIKE_DEBUG if(m->data != md) fatal("Wrong dataset in mapping_insert!\n"); if(d_flag>1) check_mapping(m); #endif free_mapping_data(md); /* We do a re-hash here instead of copying the mapping. */ if((!(k=md->free_list)) || md->refs>1) { debug_malloc_touch(m); rehash(m, md->size * 2 + 2); md=m->data; k=md->free_list; } h=h2 % md->hashsize; /* no need to lock here since we are not calling is_eq - Hubbe */ k=md->free_list; md->free_list=k->next; k->next=md->hash[h]; md->hash[h]=k; md->ind_types |= 1 << key->type; md->val_types |= 1 << val->type; assign_svalue_no_free(& k->ind, key); assign_svalue_no_free(& k->val, val); k->hval = h2; md->size++; #ifdef PIKE_DEBUG m->debug_size++; #endif #ifdef PIKE_DEBUG if(d_flag>1) check_mapping(m); #endif } void mapping_insert(struct mapping *m, struct svalue *key, struct svalue *val) { low_mapping_insert(m,key,val,1); } union anything *mapping_get_item_ptr(struct mapping *m, struct svalue *key, TYPE_T t) { unsigned INT32 h, h2; struct keypair *k, **prev; struct mapping_data *md,*omd; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); if(d_flag>1) check_mapping(m); debug_malloc_touch(m); debug_malloc_touch(m->data); #endif h2=hash_svalue(key); LOW_FIND(is_eq, key, struct svalue *tmp=&k->ind; SAME_DATA(goto mg_set_value, omd=md; LOW_FIND(is_identical, tmp, free_mapping_data(omd); goto mg_set_value, free_mapping_data(omd); goto mg_do_nothing)), Z: SAME_DATA(goto mg_insert, omd=md; LOW_FIND2(is_eq, key, free_mapping_data(omd); goto mg_do_nothing, free_mapping_data(omd); goto Z))); mg_do_nothing: free_mapping_data(md); return 0; mg_set_value: #ifdef PIKE_DEBUG if(m->data != md) fatal("Wrong dataset in mapping_get_item_ptr!\n"); if(d_flag) check_mapping(m); #endif free_mapping_data(md); if(k->val.type == t) { PREPARE_FOR_DATA_CHANGE2(); PROPAGATE(); /* prepare then propagate */ return & ( k->val.u ); } return 0; mg_insert: #ifdef PIKE_DEBUG if(m->data != md) fatal("Wrong dataset in mapping_get_item_ptr!\n"); if(d_flag) check_mapping(m); #endif free_mapping_data(md); if(t != T_INT) return 0; /* no need to call PREPARE_* because we re-hash instead */ if(!(k=md->free_list) || md->refs>1) { debug_malloc_touch(m); rehash(m, md->size * 2 + 2); md=m->data; k=md->free_list; } h=h2 % md->hashsize; md->free_list=k->next; k->next=md->hash[h]; md->hash[h]=k; assign_svalue_no_free(& k->ind, key); k->val.type=T_INT; k->val.subtype=NUMBER_NUMBER; k->val.u.integer=0; k->hval = h2; md->ind_types |= 1 << key->type; md->val_types |= BIT_INT; md->size++; #ifdef PIKE_DEBUG m->debug_size++; #endif #ifdef PIKE_DEBUG if(d_flag > 1) check_mapping_type_fields(m); #endif return & ( k->val.u ); } void map_delete_no_free(struct mapping *m, struct svalue *key, struct svalue *to) { unsigned INT32 h,h2; struct keypair *k, **prev; struct mapping_data *md,*omd; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); if(d_flag>1) check_mapping(m); debug_malloc_touch(m); #endif h2=hash_svalue(key); LOW_FIND(is_eq, key, struct svalue *tmp=&k->ind; SAME_DATA(goto md_remove_value, omd=md; LOW_FIND(is_identical, tmp, free_mapping_data(omd); goto md_remove_value, free_mapping_data(omd); goto md_do_nothing)), goto md_do_nothing); md_do_nothing: debug_malloc_touch(m); free_mapping_data(md); if(to) { to->type=T_INT; to->subtype=NUMBER_UNDEFINED; to->u.integer=0; } return; md_remove_value: #ifdef PIKE_DEBUG if(md->refs <= 1) fatal("Too few refs i mapping->data\n"); if(m->data != md) fatal("Wrong dataset in mapping_delete!\n"); if(d_flag>1) check_mapping(m); debug_malloc_touch(m); #endif free_mapping_data(md); PREPARE_FOR_INDEX_CHANGE2(); /* No need to propagate */ *prev=k->next; free_svalue(& k->ind); if(to) to[0]=k->val; else free_svalue(& k->val); k->ind.type=T_INT; k->val.type=T_INT; k->next=md->free_list; md->free_list=k; md->size--; #ifdef PIKE_DEBUG m->debug_size--; #endif if(md->size < (md->hashsize + 1) * MIN_LINK_LENGTH) { debug_malloc_touch(m); rehash(m, MAP_SLOTS(m->data->size)); } #ifdef PIKE_DEBUG if(d_flag>1) check_mapping(m); #endif return; } void check_mapping_for_destruct(struct mapping *m) { INT32 e; struct keypair *k, **prev; TYPE_FIELD ind_types, val_types; struct mapping_data *md=m->data; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); if(d_flag>1) check_mapping(m); debug_malloc_touch(m); #endif /* no is_eq -> no locking */ if(!md->size) return; if((md->ind_types | md->val_types) & (BIT_OBJECT | BIT_FUNCTION)) { val_types = ind_types = 0; md->val_types |= BIT_INT; for(e=0;e<md->hashsize;e++) { for(prev= md->hash + e;(k=*prev);) { check_destructed(& k->val); if((k->ind.type == T_OBJECT || k->ind.type == T_FUNCTION) && !k->ind.u.object->prog) { PREPARE_FOR_INDEX_CHANGE2(); *prev=k->next; free_svalue(& k->ind); free_svalue(& k->val); k->next=md->free_list; md->free_list=k; md->size--; #ifdef PIKE_DEBUG m->debug_size++; #endif }else{ val_types |= 1 << k->val.type; ind_types |= 1 << k->ind.type; prev=&k->next; } } } if(MAP_SLOTS(md->size) < md->hashsize * MIN_LINK_LENGTH) { debug_malloc_touch(m); rehash(m, MAP_SLOTS(md->size)); } md->val_types = val_types; md->ind_types = ind_types; #ifdef PIKE_DEBUG if(d_flag>1) check_mapping(m); #endif } } struct svalue *low_mapping_lookup(struct mapping *m, struct svalue *key) { unsigned INT32 h,h2; struct keypair *k=0, **prev=0; struct mapping_data *md, *omd; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); if(d_flag>1) check_mapping(m); #endif h2=hash_svalue(key); #ifdef PIKE_DEBUG if(d_flag > 1) check_mapping_type_fields(m); #endif FIND(); if(k) { PROPAGATE(); return &k->val; } return 0; } struct svalue *low_mapping_string_lookup(struct mapping *m, struct pike_string *p) { struct svalue tmp; tmp.type=T_STRING; tmp.u.string=p; return low_mapping_lookup(m, &tmp); } void mapping_string_insert(struct mapping *m, struct pike_string *p, struct svalue *val) { struct svalue tmp; tmp.type=T_STRING; tmp.u.string=p; mapping_insert(m, &tmp, val); } void mapping_string_insert_string(struct mapping *m, struct pike_string *p, struct pike_string *val) { struct svalue tmp; tmp.type=T_STRING; tmp.u.string=val; mapping_string_insert(m, p, &tmp); } struct svalue *simple_mapping_string_lookup(struct mapping *m, char *p) { struct pike_string *tmp; if((tmp=findstring(p))) return low_mapping_string_lookup(m,tmp); return 0; } struct svalue *mapping_mapping_lookup(struct mapping *m, struct svalue *key1, struct svalue *key2, int create) { struct svalue tmp; struct mapping *m2; struct svalue *s=low_mapping_lookup(m, key1); debug_malloc_touch(m); #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif if(!s || !s->type==T_MAPPING) { if(!create) return 0; tmp.u.mapping=allocate_mapping(5); tmp.type=T_MAPPING; mapping_insert(m, key1, &tmp); debug_malloc_touch(m); debug_malloc_touch(tmp.u.mapping); free_mapping(tmp.u.mapping); /* There is one ref in 'm' */ s=&tmp; } m2=s->u.mapping; debug_malloc_touch(m2); s=low_mapping_lookup(m2, key2); if(s) return s; if(!create) return 0; tmp.type=T_INT; tmp.subtype=NUMBER_UNDEFINED; tmp.u.integer=0; mapping_insert(m2, key2, &tmp); debug_malloc_touch(m2); return low_mapping_lookup(m2, key2); } struct svalue *mapping_mapping_string_lookup(struct mapping *m, struct pike_string *key1, struct pike_string *key2, int create) { struct svalue k1,k2; k1.type=T_STRING; k1.u.string=key1; k2.type=T_STRING; k2.u.string=key2; return mapping_mapping_lookup(m,&k1,&k2,create); } void mapping_index_no_free(struct svalue *dest, struct mapping *m, struct svalue *key) { struct svalue *p; if((p=low_mapping_lookup(m,key))) { if(p->type==T_INT) p->subtype=NUMBER_NUMBER; assign_svalue_no_free(dest, p); }else{ dest->type=T_INT; dest->u.integer=0; dest->subtype=NUMBER_UNDEFINED; } } struct array *mapping_indices(struct mapping *m) { INT32 e; struct array *a; struct svalue *s; struct keypair *k; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif a=allocate_array(m->data->size); s=ITEM(a); /* no locking required */ NEW_MAPPING_LOOP(m->data) assign_svalue(s++, & k->ind); a->type_field = m->data->ind_types; #ifdef PIKE_DEBUG if(d_flag > 1) check_mapping_type_fields(m); #endif return a; } struct array *mapping_values(struct mapping *m) { INT32 e; struct keypair *k; struct array *a; struct svalue *s; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif a=allocate_array(m->data->size); s=ITEM(a); /* no locking required */ NEW_MAPPING_LOOP(m->data) assign_svalue(s++, & k->val); a->type_field = m->data->val_types; #ifdef PIKE_DEBUG if(d_flag > 1) check_mapping_type_fields(m); #endif return a; } struct array *mapping_to_array(struct mapping *m) { INT32 e; struct keypair *k; struct array *a; struct svalue *s; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif a=allocate_array(m->data->size); s=ITEM(a); /* no locking required */ NEW_MAPPING_LOOP(m->data) { struct array *b=allocate_array(2); assign_svalue(b->item+0, & k->ind); assign_svalue(b->item+1, & k->val); s->u.array=b; s->type=T_ARRAY; s++; } a->type_field = BIT_ARRAY; return a; } void mapping_replace(struct mapping *m,struct svalue *from, struct svalue *to) { INT32 e; struct keypair *k; struct mapping_data *md; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif md=m->data; if(md->size) { add_ref(md); NEW_MAPPING_LOOP(md) { if(is_eq(& k->val, from)) { PREPARE_FOR_DATA_CHANGE(); assign_svalue(& k->val, to); md->val_types|=1<<to->type; } } free_mapping_data(md); } #ifdef PIKE_DEBUG if(d_flag > 1) check_mapping_type_fields(m); #endif } struct mapping *mkmapping(struct array *ind, struct array *val) { struct mapping *m; struct svalue *i,*v; INT32 e; #ifdef PIKE_DEBUG if(ind->size != val->size) fatal("mkmapping on different sized arrays.\n"); #endif m=allocate_mapping(MAP_SLOTS(ind->size)); i=ITEM(ind); v=ITEM(val); for(e=0;e<ind->size;e++) mapping_insert(m, i++, v++); return m; } #if 0 struct mapping *copy_mapping(struct mapping *m) { INT32 e; struct mapping *n; struct keypair *k; struct mapping_data *md; md=m->data; n=allocate_mapping(MAP_SLOTS(md->size)); md->valrefs++; add_ref(md); NEW_MAPPING_LOOP(md) mapping_insert(n, &k->ind, &k->val); md->valrefs--; free_mapping_data(md); return n; } #else /* deferred mapping copy! */ struct mapping *copy_mapping(struct mapping *m) { struct mapping *n; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif n=allocate_mapping(0); if(!m_sizeof(m)) return n; /* done */ debug_malloc_touch(n->data); free_mapping_data(n->data); n->data=m->data; #ifdef PIKE_DEBUG n->debug_size=n->data->size; #endif n->data->refs++; n->data->valrefs++; n->data->hardlinks++; debug_malloc_touch(n->data); return n; } #endif struct mapping *merge_mappings(struct mapping *a, struct mapping *b, INT32 op) { struct array *ai, *av; struct array *bi, *bv; struct array *ci, *cv; INT32 *zipper; struct mapping *m; #ifdef PIKE_DEBUG if(a->data->refs <=0) fatal("Zero refs in mapping->data\n"); if(b->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif ai=mapping_indices(a); av=mapping_values(a); if(ai->size > 1) { zipper=get_set_order(ai); order_array(ai, zipper); order_array(av, zipper); free((char *)zipper); } bi=mapping_indices(b); bv=mapping_values(b); if(bi->size > 1) { zipper=get_set_order(bi); order_array(bi, zipper); order_array(bv, zipper); free((char *)zipper); } zipper=merge(ai,bi,op); ci=array_zip(ai,bi,zipper); free_array(ai); free_array(bi); cv=array_zip(av,bv,zipper); free_array(av); free_array(bv); free((char *)zipper); m=mkmapping(ci, cv); free_array(ci); free_array(cv); return m; } struct mapping *merge_mapping_array_ordered(struct mapping *a, struct array *b, INT32 op) { struct array *ai, *av; struct array *ci, *cv; INT32 *zipper; struct mapping *m; ai=mapping_indices(a); av=mapping_values(a); if(ai->size > 1) { zipper=get_set_order(ai); order_array(ai, zipper); order_array(av, zipper); free((char *)zipper); } switch (op) /* no elements from »b» may be selected */ { case PIKE_ARRAY_OP_AND: zipper=merge(b,ai,op); ci=array_zip(b,ai,zipper); /* b must not be used */ cv=array_zip(b,av,zipper); /* b must not be used */ break; case PIKE_ARRAY_OP_SUB: zipper=merge(ai,b,op); ci=array_zip(ai,b,zipper); /* b must not be used */ cv=array_zip(av,b,zipper); /* b must not be used */ break; default: fatal("merge_mapping_array on other then AND or SUB\n"); } free_array(ai); free_array(av); free((char *)zipper); m=mkmapping(ci, cv); free_array(ci); free_array(cv); return m; } struct mapping *merge_mapping_array_unordered(struct mapping *a, struct array *b, INT32 op) { struct array *b_temp; INT32 *zipper; struct mapping *m; if (b->size>1) { zipper=get_set_order(b); b_temp=reorder_and_copy_array(b,zipper); m=merge_mapping_array_ordered(a,b_temp,op); free_array(b_temp); } else m=merge_mapping_array_ordered(a,b,op); return m; } struct mapping *add_mappings(struct svalue *argp, INT32 args) { INT32 e,d; struct mapping *ret; struct keypair *k; for(e=d=0;d<args;d++) { #ifdef PIKE_DEBUG if(d_flag>1) check_mapping(argp[d].u.mapping); #endif e+=argp[d].u.mapping->data->size; } #if 1 /* Major optimization */ for(d=0;d<args;d++) if(e==argp[d].u.mapping->data->size) return copy_mapping(argp[d].u.mapping); #endif /* FIXME: need locking! */ ret=allocate_mapping(MAP_SLOTS(e)); for(d=0;d<args;d++) MAPPING_LOOP(argp[d].u.mapping) mapping_insert(ret, &k->ind, &k->val); return ret; } int mapping_equal_p(struct mapping *a, struct mapping *b, struct processing *p) { struct processing curr; struct keypair *k; struct mapping_data *md; INT32 e,eq=1; #ifdef PIKE_DEBUG if(a->data->refs <=0) fatal("Zero refs in mapping->data\n"); if(b->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif if(a==b) return 1; if(m_sizeof(a) != m_sizeof(b)) return 0; curr.pointer_a = a; curr.pointer_b = b; curr.next = p; for( ;p ;p=p->next) if(p->pointer_a == (void *)a && p->pointer_b == (void *)b) return 1; check_mapping_for_destruct(a); check_mapping_for_destruct(b); md=a->data; md->valrefs++; add_ref(md); NEW_MAPPING_LOOP(md) { struct svalue *s; if((s=low_mapping_lookup(b, & k->ind))) { if(!low_is_equal(s, &k->val, &curr)) { eq=0; break; } }else{ eq=0; break; } } md->valrefs--; free_mapping_data(md); return eq; } void describe_mapping(struct mapping *m,struct processing *p,int indent) { struct processing doing; struct array *a; JMP_BUF catch; ONERROR err; INT32 e,d; struct keypair *k; char buf[40]; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif if(! m->data->size) { my_strcat("([ ])"); return; } doing.next=p; doing.pointer_a=(void *)m; for(e=0;p;e++,p=p->next) { if(p->pointer_a == (void *)m) { sprintf(buf,"@%ld",(long)e); my_strcat(buf); return; } } sprintf(buf, m->data->size == 1 ? "([ /* %ld element */\n" : "([ /* %ld elements */\n", (long)m->data->size); my_strcat(buf); a = mapping_indices(m); SET_ONERROR(err, do_free_array, a); if(!SETJMP(catch)) sort_array_destructively(a); UNSETJMP(catch); /* no mapping locking required (I hope) */ for(e = 0; e < a->size; e++) { struct svalue *tmp; if(e) my_strcat(",\n"); for(d = 0; d < indent; d++) my_putchar(' '); describe_svalue(ITEM(a)+e, indent+2, &doing); my_putchar(':'); if((tmp=low_mapping_lookup(m, ITEM(a)+e))) describe_svalue(tmp, indent+2, &doing); else my_strcat("** gone **"); } UNSET_ONERROR(err); free_array(a); my_putchar('\n'); for(e=2; e<indent; e++) my_putchar(' '); my_strcat("])"); } node *make_node_from_mapping(struct mapping *m) { struct keypair *k; INT32 e; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif mapping_fix_type_field(m); if((m->data->ind_types | m->data->val_types) & (BIT_FUNCTION | BIT_OBJECT)) { struct array *ind, *val; node *n; ind=mapping_indices(m); val=mapping_values(m); n=mkefuncallnode("mkmapping", mknode(F_ARG_LIST, make_node_from_array(ind), make_node_from_array(val))); free_array(ind); free_array(val); return n; }else{ struct svalue s; if(!m->data->size) return mkefuncallnode("aggregate_mapping",0); s.type=T_MAPPING; s.subtype=0; s.u.mapping=m; return mkconstantsvaluenode(&s); } } void f_m_delete(INT32 args) { if(args < 2) error("Too few arguments to m_delete.\n"); if(sp[-args].type != T_MAPPING) error("Bad argument 1 to m_delete.\n"); map_delete(sp[-args].u.mapping,sp+1-args); pop_n_elems(args-1); } void f_aggregate_mapping(INT32 args) { INT32 e; struct keypair *k; struct mapping *m; if(args & 1) error("Uneven number of arguments to aggregate_mapping.\n"); m=allocate_mapping(MAP_SLOTS(args / 2)); for(e=-args;e<0;e+=2) mapping_insert(m, sp+e, sp+e+1); pop_n_elems(args); #ifdef PIKE_DEBUG if(d_flag) check_mapping(m); #endif push_mapping(m); } struct mapping *copy_mapping_recursively(struct mapping *m, struct processing *p) { struct processing doing; struct mapping *ret; INT32 e; struct keypair *k; struct mapping_data *md; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif doing.next=p; doing.pointer_a=(void *)m; for(;p;p=p->next) { if(p->pointer_a == (void *)m) { add_ref(ret=(struct mapping *)p->pointer_b); return ret; } } #ifdef PIKE_DEBUG if(d_flag > 1) check_mapping_type_fields(m); #endif if(!((m->data->val_types | m->data->ind_types) & BIT_COMPLEX)) return copy_mapping(m); ret=allocate_mapping(MAP_SLOTS(m->data->size)); ret->flags=m->flags; doing.pointer_b=ret; check_stack(2); md=m->data; md->valrefs++; add_ref(md); MAPPING_LOOP(m) /* FIXME: Shouldn't NEW_MAPPING_LOOP() be used? */ { copy_svalues_recursively_no_free(sp,&k->ind, 1, p); sp++; copy_svalues_recursively_no_free(sp,&k->val, 1, p); sp++; mapping_insert(ret, sp-2, sp-1); pop_n_elems(2); } md->valrefs--; free_mapping_data(md); return ret; } void mapping_search_no_free(struct svalue *to, struct mapping *m, struct svalue *look_for, struct svalue *key /* start */) { struct mapping_data *md, *omd; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif md=m->data; if(md->size) { unsigned INT32 h2,h=0; struct keypair *k=md->hash[0], **prev; if(key) { h2=hash_svalue(key); FIND(); if(!k) { to->type=T_INT; to->subtype=NUMBER_UNDEFINED; to->u.integer=0; return; } k=k->next; } md=m->data; if(md->size) { md->valrefs++; add_ref(md); if(h < (unsigned INT32)md->hashsize) { while(1) { while(k) { if(is_eq(look_for, &k->val)) { assign_svalue_no_free(to,&k->ind); md->valrefs--; free_mapping_data(md); return; } k=k->next; } h++; if(h>= (unsigned INT32)md->hashsize) break; k=md->hash[h]; } } } md->valrefs--; free_mapping_data(md); } to->type=T_INT; to->subtype=NUMBER_UNDEFINED; to->u.integer=0; } #ifdef PIKE_DEBUG void check_mapping(struct mapping *m) { int e,num; struct keypair *k; struct mapping_data *md; md=m->data; if(m->refs <=0) fatal("Mapping has zero refs.\n"); if(!m->data) fatal("Mapping has no data block.\n"); if (!m->data->refs) fatal("Mapping data block has zero refs.\n"); if(m->next && m->next->prev != m) fatal("Mapping ->next->prev != mapping.\n"); if(m->debug_size != md->size) fatal("Mapping zapping detected!\n"); if(m->prev) { if(m->prev->next != m) fatal("Mapping ->prev->next != mapping.\n"); }else{ if(first_mapping != m) fatal("Mapping ->prev == 0 but first_mapping != mapping.\n"); } if(md->valrefs <0) fatal("md->valrefs < 0\n"); if(md->hardlinks <0) fatal("md->valrefs < 0\n"); if(md->refs < md->valrefs+1) fatal("md->refs < md->valrefs+1\n"); if(md->valrefs < md->hardlinks) fatal("md->refs < md->valrefs+1\n"); if(md->hashsize < 0) fatal("Assert: I don't think he's going to make it Jim.\n"); if(md->size < 0) fatal("Core breach, evacuate ship!\n"); if(md->num_keypairs < 0) fatal("Starboard necell on fire!\n"); if(md->size > md->num_keypairs) fatal("Pretty mean hashtable there buster!\n"); if(md->hashsize > md->num_keypairs) fatal("Pretty mean hashtable there buster (2)!\n"); if(md->num_keypairs > (md->hashsize + 3) * AVG_LINK_LENGTH) fatal("Mapping from hell detected, attempting to send it back...\n"); if(md->size > 0 && (!md->ind_types || !md->val_types)) fatal("Mapping type fields are... wrong.\n"); num=0; NEW_MAPPING_LOOP(md) { num++; if(! ( (1 << k->ind.type) & (md->ind_types) )) fatal("Mapping indices type field lies.\n"); if(! ( (1 << k->val.type) & (md->val_types) )) fatal("Mapping values type field lies.\n"); check_svalue(& k->ind); check_svalue(& k->val); /* FIXME add check for k->hval * beware that hash_svalue may be threaded and locking * is required!! */ } if(md->size != num) fatal("Shields are failing, hull integrity down to 20%%\n"); } void check_all_mappings(void) { struct mapping *m; for(m=first_mapping;m;m=m->next) check_mapping(m); } #endif void gc_mark_mapping_as_referenced(struct mapping *m) { INT32 e; struct keypair *k; #ifdef PIKE_DEBUG if(m->data->refs <=0) fatal("Zero refs in mapping->data\n"); #endif if(gc_mark(m) && gc_mark(m->data)) { if((m->data->ind_types | m->data->val_types) & BIT_COMPLEX) { MAPPING_LOOP(m) { /* We do not want to count this key:index pair if * the index is a destructed object or function */ if(((1 << k->ind.type) & (BIT_OBJECT | BIT_FUNCTION)) && !(k->ind.u.object->prog)) continue; if (m->flags & MAPPING_FLAG_WEAK) { if (k->ind.type == T_OBJECT && k->ind.u.object->prog->flags & PROGRAM_NO_WEAK_FREE) gc_mark_svalues(&k->ind, 1); if (k->val.type == T_OBJECT && k->val.u.object->prog && k->val.u.object->prog->flags & PROGRAM_NO_WEAK_FREE) gc_mark_svalues(&k->val, 1); } else { gc_mark_svalues(&k->ind, 1); gc_mark_svalues(&k->val, 1); } } } } } void gc_check_all_mappings(void) { INT32 e; struct keypair *k; struct mapping *m; for(m=first_mapping;m;m=m->next) { if((m->data->ind_types | m->data->val_types) & BIT_COMPLEX) { if(gc_check(m->data)) continue; MAPPING_LOOP(m) { /* We do not want to count this key:index pair if * the index is a destructed object or function */ if(((1 << k->ind.type) & (BIT_OBJECT | BIT_FUNCTION)) && !(k->ind.u.object->prog)) continue; debug_gc_check_svalues(&k->ind, 1, T_MAPPING, m); m->data->val_types |= debug_gc_check_svalues(&k->val, 1, T_MAPPING, m); } #ifdef PIKE_DEBUG if(d_flag > 1) check_mapping_type_fields(m); #endif } } } void gc_mark_all_mappings(void) { struct mapping *m; for(m=first_mapping;m;m=m->next) if(gc_is_referenced(m)) gc_mark_mapping_as_referenced(m); } void gc_free_all_unreferenced_mappings(void) { INT32 e; struct keypair *k,**prev; struct mapping *m,*next; struct mapping_data *md; for(m=first_mapping;m;m=next) { check_mapping_for_destruct(m); if(gc_do_free(m)) { add_ref(m); unlink_mapping_data(m->data); m->data=&empty_data; m->data->refs++; next=m->next; #ifdef PIKE_DEBUG m->debug_size=0; #endif free_mapping(m); } else if(m->flags & MAPPING_FLAG_WEAK) { add_ref(m); md=m->data; /* no locking required (no is_eq) */ for(e=0;e<md->hashsize;e++) { for(prev= md->hash + e;(k=*prev);) { if((k->val.type <= MAX_COMPLEX && !(k->val.type == T_OBJECT && k->val.u.object->prog->flags & PROGRAM_NO_WEAK_FREE) && gc_do_free(k->val.u.refs)) || (k->ind.type <= MAX_COMPLEX && !(k->ind.type == T_OBJECT && k->ind.u.object->prog->flags & PROGRAM_NO_WEAK_FREE) && gc_do_free(k->ind.u.refs))) { PREPARE_FOR_INDEX_CHANGE(); *prev=k->next; free_svalue(& k->ind); free_svalue(& k->val); k->next=md->free_list; md->free_list=k; md->size--; #ifdef PIKE_DEBUG m->debug_size--; #endif }else{ prev=&k->next; } } } if(MAP_SLOTS(md->size) < md->hashsize * MIN_LINK_LENGTH) { debug_malloc_touch(m); rehash(m, MAP_SLOTS(md->size)); } next=m->next; free_mapping(m); } else { next=m->next; } } } #ifdef PIKE_DEBUG void simple_describe_mapping(struct mapping *m) { char *s; init_buf(); describe_mapping(m,0,2); s=simple_free_buf(); fprintf(stderr,"%s\n",s); free(s); } void debug_dump_mapping(struct mapping *m) { fprintf(stderr,"Refs=%d, next=%p, prev=%p, size=%d, hashsize=%d\n", m->refs, m->next, m->prev, m->data->size, m->data->hashsize); fprintf(stderr,"Indices type field = "); debug_dump_type_field(m->data->ind_types); fprintf(stderr,"\n"); fprintf(stderr,"Values type field = "); debug_dump_type_field(m->data->val_types); fprintf(stderr,"\n"); simple_describe_mapping(m); } #endif void zap_all_mappings(void) { INT32 e; struct keypair *k; struct mapping *m,*next; struct mapping_data *md; for(m=first_mapping;m;m=next) { add_ref(m); #if defined(PIKE_DEBUG) && defined(DEBUG_MALLOC) if(verbose_debug_exit) debug_dump_mapping(m); #endif md=m->data; for(e=0;e<md->hashsize;e++) { while((k=md->hash[e])) { md->hash[e]=k->next; k->next=md->free_list; md->free_list=k; free_svalue(&k->ind); free_svalue(&k->val); } } md->size=0; #ifdef PIKE_DEBUG m->debug_size=0; #endif next=m->next; /* free_mapping(m); */ } free_all_mapping_blocks(); }

pike.git/ src/ mapping.c > 53bb63286128d832391e278a358a2ad020e6dd84 [Annotate]