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Comparing deliantra/server/common/shstr.C (file contents):
Revision 1.12 by root, Thu Sep 7 07:52:58 2006 UTC vs.
Revision 1.33 by root, Wed Dec 31 18:07:41 2008 UTC

1/*
2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 *
4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 *
6 * Deliantra is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 *
19 * The authors can be reached via e-mail to <support@deliantra.net>
20 */
21
1/* 22/*
2 * shstr.C 23 * shstr.C
3 */ 24 */
4 25
5#include <cstring> 26#include <cstring>
6#include <cstdlib> 27#include <cstdlib>
7
8#include <glib.h> 28#include <glib.h>
9
10#include <tr1/unordered_set> 29#include <tr1/unordered_set>
11 30
12#include "shstr.h"
13#include "util.h" 31#include "global.h"
14 32
33size_t shstr_alloc;
34
15typedef std::tr1::unordered_set<const char *, str_hash, str_equal> HT; 35typedef std::tr1::unordered_set <const char *, str_hash, str_equal, slice_allocator<const char *> > HT;
16 36
17static HT ht; 37static HT ht;
38static int next_gc;
18 39
19static const char *makevec (const char *s) 40static const char *
41makevec (const char *s)
20{ 42{
21 int len = strlen (s); 43 int len = strlen (s);
22 44
45 shstr_alloc += sizeof (uint32_t) * 2 + len + 1;
23 const char *v = (const char *)(2 + (int *)g_slice_alloc (sizeof (int) * 2 + len + 1)); 46 const char *v = (const char *) (2 + (int *)g_slice_alloc (sizeof (uint32_t) * 2 + len + 1));
24 47
25 shstr::length (v) = len; 48 shstr::length (v) = len;
26 shstr::refcnt (v) = 1; 49 shstr::refcnt (v) = 1;
27 50
28 memcpy ((char *)v, s, len + 1); 51 memcpy ((char *) v, s, len + 1);
29 52
30 return v; 53 return v;
31} 54}
32 55
33const char *shstr::null = makevec ("<nil>"); 56shstr_vec<sizeof "(null)"> shstr_tmp::nullvec = { 0, 0xffffffff, "(null)" };
34
35// what weird misoptimisation is this again?
36const shstr undead_name ("undead");
37 57
38const char * 58const char *
39shstr::find (const char *s) 59shstr::find (const char *s)
40{ 60{
41 if (!s) 61 if (!s)
42 return s; 62 return s;
43 63
44 HT::iterator i = ht.find (s); 64 auto (i, ht.find (s));
45 65
46 return i != ht.end () 66 return i != ht.end ()? *i : 0;
47 ? *i
48 : 0;
49} 67}
50 68
51const char * 69const char *
52shstr::intern (const char *s) 70shstr::intern (const char *s)
53{ 71{
54 if (!s) 72 if (!s)
55 return null; 73 return null ();
56 74
57 if (const char *found = find (s)) 75 if (const char *found = find (s))
58 { 76 {
59 ++refcnt (found); 77 ++refcnt (found);
60 return found; 78 return found;
61 } 79 }
62 80
81 --next_gc;
63 s = makevec (s); 82 s = makevec (s);
64 ht.insert (s); 83 ht.insert (s);
65 return s; 84 return s;
66} 85}
67 86
68// periodically test refcounts == 0 for a few strings 87// periodically test refcounts == 0 for a few strings
69// this is the ONLY thing that erases stuff from ht. keep it that way. 88// this is the ONLY thing that erases stuff from ht. keep it that way.
70void 89void
71shstr::gc () 90shstr::gc ()
72{ 91{
92 if (expect_true (next_gc > 0))
93 return;
94
73 static const char *curpos; 95 static const char *curpos;
74 96
75 HT::iterator i = curpos ? ht.find (curpos) : ht.begin (); 97 auto (i, curpos ? ht.find (curpos) : ht.begin ());
76 98
77 if (i == ht.end ()) 99 if (i == ht.end ())
78 i = ht.begin (); 100 i = ht.begin ();
79 101
80 // go through all strings roughly once every 4 minutes
81 int n = ht.size () / 256 + 16; 102 int n = ht.size () / 256 + 16;
103 next_gc += n >> 1;
82 104
83 for (;;) 105 for (;;)
84 { 106 {
85 if (i == ht.end ()) 107 if (i == ht.end ())
86 { 108 {
… …
89 } 111 }
90 else if (!--n) 112 else if (!--n)
91 break; 113 break;
92 else if (!refcnt (*i)) 114 else if (!refcnt (*i))
93 { 115 {
94 HT::iterator o = i++; 116 auto (o, i++);
95 const char *s = *o; 117 const char *s = *o;
118
96 ht.erase (o); 119 ht.erase (o);
97 120
98 //printf ("GC %4d %3d %d >%s<%d\n", (int)ht.size (), n, shstr::refcnt (s), s, shstr::length (s)); 121 //printf ("GC %4d %3d %d >%s<%d\n", (int)ht.size (), n, shstr::refcnt (s), s, shstr::length (s));
122 shstr_alloc -= sizeof (uint32_t) * 2 + length (s) + 1;
99 g_slice_free1 (sizeof (int) * 2 + length (s) + 1, -2 + (int *)s); 123 g_slice_free1 (sizeof (uint32_t) * 2 + length (s) + 1, -2 + (int *) s);
100 } 124 }
101 else 125 else
102 ++i; 126 ++i;
103 } 127 }
104 128
105 curpos = *i; 129 curpos = *i;
106} 130}
107 131
132// declare these here to get correct initialisation order
133#define def(str) const shstr shstr_ ## str (# str);
134# include "shstrinc.h"
135#undef def
136
137shstr skill_names[NUM_SKILLS];
138
108//TODO: this should of course not be here 139//TODO: this should of course not be here
140
109/* buf_overflow() - we don't want to exceed the buffer size of 141/* buf_overflow() - we don't want to exceed the buffer size of
110 * buf1 by adding on buf2! Returns true if overflow will occur. 142 * buf1 by adding on buf2! Returns true if overflow will occur.
111 */ 143 */
112
113int 144int
114buf_overflow (const char *buf1, const char *buf2, int bufsize) 145buf_overflow (const char *buf1, const char *buf2, int bufsize)
115{ 146{
116 int len1 = 0, len2 = 0; 147 int len1 = 0, len2 = 0;
117 148
118 if (buf1) 149 if (buf1)
119 len1 = strlen (buf1); 150 len1 = strlen (buf1);
151
120 if (buf2) 152 if (buf2)
121 len2 = strlen (buf2); 153 len2 = strlen (buf2);
154
122 if ((len1 + len2) >= bufsize) 155 if ((len1 + len2) >= bufsize)
123 return 1;
124 return 0; 156 return 1;
157
158 return 0;
125} 159}
126

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