1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
6 | * Deliantra is free software: you can redistribute it and/or modify |
7 | * under the terms of the GNU General Public License as published by the Free |
7 | * it under the terms of the GNU General Public License as published by |
8 | * Software Foundation; either version 2 of the License, or (at your option) |
8 | * the Free Software Foundation, either version 3 of the License, or |
9 | * any later version. |
9 | * (at your option) any later version. |
10 | * |
10 | * |
11 | * This program is distributed in the hope that it will be useful, but |
11 | * This program is distributed in the hope that it will be useful, |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * for more details. |
14 | * GNU General Public License for more details. |
15 | * |
15 | * |
16 | * You should have received a copy of the GNU General Public License along |
16 | * You should have received a copy of the GNU General Public License |
17 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
18 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
|
19 | * |
18 | * |
20 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
19 | * The authors can be reached via e-mail to <support@deliantra.net> |
21 | */ |
20 | */ |
22 | |
21 | |
23 | #ifndef UTIL_H__ |
22 | #ifndef UTIL_H__ |
24 | #define UTIL_H__ |
23 | #define UTIL_H__ |
25 | |
24 | |
26 | //#define PREFER_MALLOC |
25 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
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26 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
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27 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
27 | |
28 | |
28 | #if __GNUC__ >= 3 |
29 | #if __GNUC__ >= 3 |
29 | # define is_constant(c) __builtin_constant_p (c) |
30 | # define is_constant(c) __builtin_constant_p (c) |
30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
31 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
31 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
32 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
… | |
… | |
43 | // is mostly true or mosty false. note that these return |
44 | // is mostly true or mosty false. note that these return |
44 | // booleans, not the expression. |
45 | // booleans, not the expression. |
45 | #define expect_false(expr) expect ((expr) != 0, 0) |
46 | #define expect_false(expr) expect ((expr) != 0, 0) |
46 | #define expect_true(expr) expect ((expr) != 0, 1) |
47 | #define expect_true(expr) expect ((expr) != 0, 1) |
47 | |
48 | |
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49 | #include <pthread.h> |
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50 | |
48 | #include <cstddef> |
51 | #include <cstddef> |
49 | #include <cmath> |
52 | #include <cmath> |
50 | #include <new> |
53 | #include <new> |
51 | #include <vector> |
54 | #include <vector> |
52 | |
55 | |
53 | #include <glib.h> |
56 | #include <glib.h> |
54 | |
57 | |
55 | #include <shstr.h> |
58 | #include <shstr.h> |
56 | #include <traits.h> |
59 | #include <traits.h> |
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60 | |
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61 | #if DEBUG_SALLOC |
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62 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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63 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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64 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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65 | void *g_slice_alloc (unsigned long size); |
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66 | void *g_slice_alloc0 (unsigned long size); |
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67 | void g_slice_free1 (unsigned long size, void *ptr); |
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68 | #elif PREFER_MALLOC |
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69 | # define g_slice_alloc0(s) calloc (1, (s)) |
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70 | # define g_slice_alloc(s) malloc ((s)) |
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71 | # define g_slice_free1(s,p) free ((p)) |
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72 | #endif |
57 | |
73 | |
58 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
74 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
59 | #define auto(var,expr) decltype(expr) var = (expr) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
60 | |
76 | |
61 | // very ugly macro that basicaly declares and initialises a variable |
77 | // very ugly macro that basicaly declares and initialises a variable |
… | |
… | |
71 | |
87 | |
72 | // in range excluding end |
88 | // in range excluding end |
73 | #define IN_RANGE_EXC(val,beg,end) \ |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
74 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
90 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
75 | |
91 | |
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92 | void cleanup (const char *cause, bool make_core = false); |
76 | void fork_abort (const char *msg); |
93 | void fork_abort (const char *msg); |
77 | |
94 | |
78 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
95 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
79 | // as a is often a constant while b is the variable. it is still a bug, though. |
96 | // as a is often a constant while b is the variable. it is still a bug, though. |
80 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
97 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
81 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
98 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
82 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; } |
99 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; } |
83 | |
100 | |
84 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
101 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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102 | |
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103 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
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104 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
85 | |
105 | |
86 | template<typename T> |
106 | template<typename T> |
87 | static inline T |
107 | static inline T |
88 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
108 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
89 | { |
109 | { |
… | |
… | |
173 | absdir (int d) |
193 | absdir (int d) |
174 | { |
194 | { |
175 | return ((d - 1) & 7) + 1; |
195 | return ((d - 1) & 7) + 1; |
176 | } |
196 | } |
177 | |
197 | |
178 | // makes dynamically allocated objects zero-initialised |
198 | extern ssize_t slice_alloc; // statistics |
179 | struct zero_initialised |
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180 | { |
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181 | void *operator new (size_t s, void *p) |
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182 | { |
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183 | memset (p, 0, s); |
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184 | return p; |
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185 | } |
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186 | |
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187 | void *operator new (size_t s) |
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188 | { |
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189 | return g_slice_alloc0 (s); |
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190 | } |
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191 | |
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192 | void *operator new[] (size_t s) |
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193 | { |
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194 | return g_slice_alloc0 (s); |
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195 | } |
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196 | |
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197 | void operator delete (void *p, size_t s) |
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198 | { |
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199 | g_slice_free1 (s, p); |
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200 | } |
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201 | |
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202 | void operator delete[] (void *p, size_t s) |
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203 | { |
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204 | g_slice_free1 (s, p); |
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205 | } |
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206 | }; |
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207 | |
199 | |
208 | void *salloc_ (int n) throw (std::bad_alloc); |
200 | void *salloc_ (int n) throw (std::bad_alloc); |
209 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
201 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
210 | |
202 | |
211 | // strictly the same as g_slice_alloc, but never returns 0 |
203 | // strictly the same as g_slice_alloc, but never returns 0 |
… | |
… | |
223 | |
215 | |
224 | // for symmetry |
216 | // for symmetry |
225 | template<typename T> |
217 | template<typename T> |
226 | inline void sfree (T *ptr, int n = 1) throw () |
218 | inline void sfree (T *ptr, int n = 1) throw () |
227 | { |
219 | { |
228 | #ifdef PREFER_MALLOC |
220 | if (expect_true (ptr)) |
229 | free (ptr); |
221 | { |
230 | #else |
222 | slice_alloc -= n * sizeof (T); |
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223 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
231 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
224 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
232 | #endif |
225 | assert (slice_alloc >= 0);//D |
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226 | } |
233 | } |
227 | } |
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228 | |
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229 | // nulls the pointer |
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230 | template<typename T> |
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231 | inline void sfree0 (T *&ptr, int n = 1) throw () |
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232 | { |
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233 | sfree<T> (ptr, n); |
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234 | ptr = 0; |
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235 | } |
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236 | |
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237 | // makes dynamically allocated objects zero-initialised |
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238 | struct zero_initialised |
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239 | { |
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240 | void *operator new (size_t s, void *p) |
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241 | { |
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242 | memset (p, 0, s); |
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243 | return p; |
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244 | } |
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245 | |
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246 | void *operator new (size_t s) |
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247 | { |
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248 | return salloc0<char> (s); |
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249 | } |
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250 | |
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251 | void *operator new[] (size_t s) |
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252 | { |
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253 | return salloc0<char> (s); |
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254 | } |
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255 | |
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256 | void operator delete (void *p, size_t s) |
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257 | { |
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258 | sfree ((char *)p, s); |
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259 | } |
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260 | |
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261 | void operator delete[] (void *p, size_t s) |
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262 | { |
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263 | sfree ((char *)p, s); |
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264 | } |
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265 | }; |
234 | |
266 | |
235 | // a STL-compatible allocator that uses g_slice |
267 | // a STL-compatible allocator that uses g_slice |
236 | // boy, this is verbose |
268 | // boy, this is verbose |
237 | template<typename Tp> |
269 | template<typename Tp> |
238 | struct slice_allocator |
270 | struct slice_allocator |
… | |
… | |
250 | { |
282 | { |
251 | typedef slice_allocator<U> other; |
283 | typedef slice_allocator<U> other; |
252 | }; |
284 | }; |
253 | |
285 | |
254 | slice_allocator () throw () { } |
286 | slice_allocator () throw () { } |
255 | slice_allocator (const slice_allocator &o) throw () { } |
287 | slice_allocator (const slice_allocator &) throw () { } |
256 | template<typename Tp2> |
288 | template<typename Tp2> |
257 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
289 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
258 | |
290 | |
259 | ~slice_allocator () { } |
291 | ~slice_allocator () { } |
260 | |
292 | |
… | |
… | |
269 | void deallocate (pointer p, size_type n) |
301 | void deallocate (pointer p, size_type n) |
270 | { |
302 | { |
271 | sfree<Tp> (p, n); |
303 | sfree<Tp> (p, n); |
272 | } |
304 | } |
273 | |
305 | |
274 | size_type max_size ()const throw () |
306 | size_type max_size () const throw () |
275 | { |
307 | { |
276 | return size_t (-1) / sizeof (Tp); |
308 | return size_t (-1) / sizeof (Tp); |
277 | } |
309 | } |
278 | |
310 | |
279 | void construct (pointer p, const Tp &val) |
311 | void construct (pointer p, const Tp &val) |
… | |
… | |
334 | |
366 | |
335 | typedef tausworthe_random_generator rand_gen; |
367 | typedef tausworthe_random_generator rand_gen; |
336 | |
368 | |
337 | extern rand_gen rndm; |
369 | extern rand_gen rndm; |
338 | |
370 | |
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371 | INTERFACE_CLASS (attachable) |
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372 | struct refcnt_base |
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373 | { |
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374 | typedef int refcnt_t; |
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375 | mutable refcnt_t ACC (RW, refcnt); |
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376 | |
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377 | MTH void refcnt_inc () const { ++refcnt; } |
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378 | MTH void refcnt_dec () const { --refcnt; } |
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379 | |
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380 | refcnt_base () : refcnt (0) { } |
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381 | }; |
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382 | |
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383 | // to avoid branches with more advanced compilers |
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384 | extern refcnt_base::refcnt_t refcnt_dummy; |
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385 | |
339 | template<class T> |
386 | template<class T> |
340 | struct refptr |
387 | struct refptr |
341 | { |
388 | { |
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389 | // p if not null |
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390 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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391 | |
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392 | void refcnt_dec () |
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393 | { |
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394 | if (!is_constant (p)) |
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395 | --*refcnt_ref (); |
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396 | else if (p) |
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397 | --p->refcnt; |
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398 | } |
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399 | |
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400 | void refcnt_inc () |
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401 | { |
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402 | if (!is_constant (p)) |
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403 | ++*refcnt_ref (); |
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404 | else if (p) |
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405 | ++p->refcnt; |
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406 | } |
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407 | |
342 | T *p; |
408 | T *p; |
343 | |
409 | |
344 | refptr () : p(0) { } |
410 | refptr () : p(0) { } |
345 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
411 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
346 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
412 | refptr (T *p) : p(p) { refcnt_inc (); } |
347 | ~refptr () { if (p) p->refcnt_dec (); } |
413 | ~refptr () { refcnt_dec (); } |
348 | |
414 | |
349 | const refptr<T> &operator =(T *o) |
415 | const refptr<T> &operator =(T *o) |
350 | { |
416 | { |
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417 | // if decrementing ever destroys we need to reverse the order here |
351 | if (p) p->refcnt_dec (); |
418 | refcnt_dec (); |
352 | p = o; |
419 | p = o; |
353 | if (p) p->refcnt_inc (); |
420 | refcnt_inc (); |
354 | |
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355 | return *this; |
421 | return *this; |
356 | } |
422 | } |
357 | |
423 | |
358 | const refptr<T> &operator =(const refptr<T> o) |
424 | const refptr<T> &operator =(const refptr<T> &o) |
359 | { |
425 | { |
360 | *this = o.p; |
426 | *this = o.p; |
361 | return *this; |
427 | return *this; |
362 | } |
428 | } |
363 | |
429 | |
364 | T &operator * () const { return *p; } |
430 | T &operator * () const { return *p; } |
365 | T *operator ->() const { return p; } |
431 | T *operator ->() const { return p; } |
366 | |
432 | |
367 | operator T *() const { return p; } |
433 | operator T *() const { return p; } |
368 | }; |
434 | }; |
369 | |
435 | |
370 | typedef refptr<maptile> maptile_ptr; |
436 | typedef refptr<maptile> maptile_ptr; |
… | |
… | |
406 | return !strcmp (a, b); |
472 | return !strcmp (a, b); |
407 | } |
473 | } |
408 | }; |
474 | }; |
409 | |
475 | |
410 | // Mostly the same as std::vector, but insert/erase can reorder |
476 | // Mostly the same as std::vector, but insert/erase can reorder |
411 | // the elements, making insret/remove O(1) instead of O(n). |
477 | // the elements, making append(=insert)/remove O(1) instead of O(n). |
412 | // |
478 | // |
413 | // NOTE: only some forms of erase/insert are available |
479 | // NOTE: only some forms of erase are available |
414 | template<class T> |
480 | template<class T> |
415 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
481 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
416 | { |
482 | { |
417 | typedef typename unordered_vector::iterator iterator; |
483 | typedef typename unordered_vector::iterator iterator; |
418 | |
484 | |
… | |
… | |
440 | // + free unique (but varying) id for inserted objects |
506 | // + free unique (but varying) id for inserted objects |
441 | // + cache-friendly iteration |
507 | // + cache-friendly iteration |
442 | // - only works for pointers to structs |
508 | // - only works for pointers to structs |
443 | // |
509 | // |
444 | // NOTE: only some forms of erase/insert are available |
510 | // NOTE: only some forms of erase/insert are available |
445 | template<class T, int T::* index> |
511 | typedef int object_vector_index; |
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512 | |
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513 | template<class T, object_vector_index T::*indexmember> |
446 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
514 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
447 | { |
515 | { |
448 | typedef typename object_vector::iterator iterator; |
516 | typedef typename object_vector::iterator iterator; |
449 | |
517 | |
450 | bool contains (const T *obj) const |
518 | bool contains (const T *obj) const |
451 | { |
519 | { |
452 | return obj->*index; |
520 | return obj->*indexmember; |
453 | } |
521 | } |
454 | |
522 | |
455 | iterator find (const T *obj) |
523 | iterator find (const T *obj) |
456 | { |
524 | { |
457 | return obj->*index |
525 | return obj->*indexmember |
458 | ? this->begin () + obj->*index - 1 |
526 | ? this->begin () + obj->*indexmember - 1 |
459 | : this->end (); |
527 | : this->end (); |
460 | } |
528 | } |
461 | |
529 | |
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530 | void push_back (T *obj) |
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531 | { |
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532 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
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533 | obj->*indexmember = this->size (); |
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534 | } |
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535 | |
462 | void insert (T *obj) |
536 | void insert (T *obj) |
463 | { |
537 | { |
464 | push_back (obj); |
538 | push_back (obj); |
465 | obj->*index = this->size (); |
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466 | } |
539 | } |
467 | |
540 | |
468 | void insert (T &obj) |
541 | void insert (T &obj) |
469 | { |
542 | { |
470 | insert (&obj); |
543 | insert (&obj); |
471 | } |
544 | } |
472 | |
545 | |
473 | void erase (T *obj) |
546 | void erase (T *obj) |
474 | { |
547 | { |
475 | unsigned int pos = obj->*index; |
548 | unsigned int pos = obj->*indexmember; |
476 | obj->*index = 0; |
549 | obj->*indexmember = 0; |
477 | |
550 | |
478 | if (pos < this->size ()) |
551 | if (pos < this->size ()) |
479 | { |
552 | { |
480 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
553 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
481 | (*this)[pos - 1]->*index = pos; |
554 | (*this)[pos - 1]->*indexmember = pos; |
482 | } |
555 | } |
483 | |
556 | |
484 | this->pop_back (); |
557 | this->pop_back (); |
485 | } |
558 | } |
486 | |
559 | |
487 | void erase (T &obj) |
560 | void erase (T &obj) |
488 | { |
561 | { |
489 | errase (&obj); |
562 | erase (&obj); |
490 | } |
563 | } |
491 | }; |
564 | }; |
492 | |
565 | |
493 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
566 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
494 | void assign (char *dst, const char *src, int maxlen); |
567 | void assign (char *dst, const char *src, int maxlen); |
… | |
… | |
500 | assign ((char *)&dst, src, N); |
573 | assign ((char *)&dst, src, N); |
501 | } |
574 | } |
502 | |
575 | |
503 | typedef double tstamp; |
576 | typedef double tstamp; |
504 | |
577 | |
505 | // return current time as timestampe |
578 | // return current time as timestamp |
506 | tstamp now (); |
579 | tstamp now (); |
507 | |
580 | |
508 | int similar_direction (int a, int b); |
581 | int similar_direction (int a, int b); |
509 | |
582 | |
510 | // like printf, but returns a std::string |
583 | // like sprintf, but returns a "static" buffer |
511 | const std::string format (const char *format, ...); |
584 | const char *format (const char *format, ...); |
512 | |
585 | |
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586 | ///////////////////////////////////////////////////////////////////////////// |
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587 | // threads, very very thin wrappers around pthreads |
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588 | |
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589 | struct thread |
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590 | { |
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591 | pthread_t id; |
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592 | |
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593 | void start (void *(*start_routine)(void *), void *arg = 0); |
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594 | |
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595 | void cancel () |
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596 | { |
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597 | pthread_cancel (id); |
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598 | } |
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599 | |
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600 | void *join () |
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601 | { |
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602 | void *ret; |
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603 | |
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604 | if (pthread_join (id, &ret)) |
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605 | cleanup ("pthread_join failed", 1); |
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606 | |
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607 | return ret; |
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608 | } |
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609 | }; |
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610 | |
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611 | // note that mutexes are not classes |
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612 | typedef pthread_mutex_t smutex; |
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613 | |
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614 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
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615 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
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616 | #else |
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617 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
513 | #endif |
618 | #endif |
514 | |
619 | |
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620 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
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621 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
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622 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
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623 | |
|
|
624 | typedef pthread_cond_t scond; |
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625 | |
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626 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
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627 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
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628 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
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629 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
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630 | |
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631 | #endif |
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632 | |