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/* |
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* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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* |
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* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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* |
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* Deliantra is free software: you can redistribute it and/or modify it under |
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* the terms of the Affero GNU General Public License as published by the |
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* Free Software Foundation, either version 3 of the License, or (at your |
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* option) 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 Affero GNU General Public License |
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* and the GNU General Public License along with this program. If not, see |
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* <http://www.gnu.org/licenses/>. |
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* |
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* The authors can be reached via e-mail to <support@deliantra.net> |
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*/ |
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|
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/* |
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* shstr.C |
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*/ |
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|
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#include <cstring> |
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#include <cstdlib> |
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#include <glib.h> |
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#include <tr1/unordered_set> |
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|
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#include "global.h" |
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|
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size_t shstr_alloc; |
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|
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typedef std::tr1::unordered_set <const char *, str_hash, str_equal, slice_allocator<const char *> > HT; |
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|
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static HT ht; |
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static int next_gc; |
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|
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#define NUM_INT 3 |
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|
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static const char * |
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makevec (const char *s) |
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{ |
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int len = strlen (s); |
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int alloc = sizeof (uint32_t) * NUM_INT + len + 1; |
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|
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shstr_alloc += alloc; |
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char *v = (char *)g_slice_alloc (alloc); |
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v += sizeof (uint32_t) * NUM_INT; |
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|
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shstr::hash (v) = strhsh (s); |
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shstr::length (v) = len; |
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shstr::refcnt (v) = 1; |
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|
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memcpy (v, s, len + 1); |
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|
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return v; |
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} |
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|
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shstr_vec<sizeof "(null)"> shstr_tmp::nullvec = { STRHSH_NULL, 0, 0xffffffff, "(null)" }; |
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|
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bool |
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shstr_tmp::contains (const char *substring) const |
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{ |
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//TODO: this is supposed to check for comma-seperation... |
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return s != null () |
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&& substring |
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&& strstr (s, substring); |
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} |
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|
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const char * |
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shstr::find (const char *s) |
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{ |
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if (!s) |
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return s; |
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|
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auto (i, ht.find (s)); |
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|
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return i != ht.end ()? *i : 0; |
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} |
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|
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const char * |
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shstr::intern (const char *s) |
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{ |
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if (!s) |
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return null (); |
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|
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if (const char *found = find (s)) |
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{ |
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++refcnt (found); |
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return found; |
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} |
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|
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--next_gc; |
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s = makevec (s); |
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ht.insert (s); |
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return s; |
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} |
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|
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// periodically test refcounts == 0 for a few strings |
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// this is the ONLY thing that erases stuff from ht. keep it that way. |
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void |
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shstr::gc () |
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{ |
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if (expect_true (next_gc > 0)) |
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return; |
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|
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static const char *curpos; |
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|
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auto (i, curpos ? ht.find (curpos) : ht.begin ()); |
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|
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if (i == ht.end ()) |
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i = ht.begin (); |
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|
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int n = ht.size () / 256 + 16; |
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next_gc += n >> 1; |
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|
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for (;;) |
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{ |
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if (i == ht.end ()) |
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{ |
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curpos = 0; |
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return; |
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} |
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else if (!--n) |
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break; |
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else if (!refcnt (*i)) |
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{ |
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auto (o, i++); |
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const char *s = *o; |
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|
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ht.erase (o); |
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|
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//printf ("GC %4d %3d %d >%s<%d\n", (int)ht.size (), n, shstr::refcnt (s), s, shstr::length (s)); |
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int alloc = sizeof (uint32_t) * NUM_INT + length (s) + 1; |
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shstr_alloc -= alloc; |
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g_slice_free1 (alloc, (void *)(s - sizeof (uint32_t) * NUM_INT)); |
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} |
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else |
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++i; |
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} |
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|
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curpos = *i; |
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} |
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|
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// declare these here to get correct initialisation order |
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#define def2(id,str) const shstr id (str); |
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#define def(id) def2(shstr_ ## id, # id) |
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# include "shstrinc.h" |
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#undef def |
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#undef def2 |
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|
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materialtype_t material_null; |
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|
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struct freed_map freed_map; |
