1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
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 |
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 |
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 |
8 | * the Free Software Foundation, either version 3 of the License, or |
9 | * (at your option) 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, |
11 | * This program is distributed in the hope that it will be useful, |
… | |
… | |
14 | * GNU General Public License 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 |
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/>. |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
18 | * |
18 | * |
19 | * 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> |
20 | */ |
20 | */ |
21 | |
21 | |
22 | #ifndef UTIL_H__ |
22 | #ifndef UTIL_H__ |
23 | #define UTIL_H__ |
23 | #define UTIL_H__ |
24 | |
24 | |
25 | //#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 |
26 | |
28 | |
27 | #if __GNUC__ >= 3 |
29 | #if __GNUC__ >= 3 |
28 | # define is_constant(c) __builtin_constant_p (c) |
30 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
31 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
32 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
… | |
… | |
42 | // is mostly true or mosty false. note that these return |
44 | // is mostly true or mosty false. note that these return |
43 | // booleans, not the expression. |
45 | // booleans, not the expression. |
44 | #define expect_false(expr) expect ((expr) != 0, 0) |
46 | #define expect_false(expr) expect ((expr) != 0, 0) |
45 | #define expect_true(expr) expect ((expr) != 0, 1) |
47 | #define expect_true(expr) expect ((expr) != 0, 1) |
46 | |
48 | |
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49 | #include <pthread.h> |
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50 | |
47 | #include <cstddef> |
51 | #include <cstddef> |
48 | #include <cmath> |
52 | #include <cmath> |
49 | #include <new> |
53 | #include <new> |
50 | #include <vector> |
54 | #include <vector> |
51 | |
55 | |
52 | #include <glib.h> |
56 | #include <glib.h> |
53 | |
57 | |
54 | #include <shstr.h> |
58 | #include <shstr.h> |
55 | #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 |
56 | |
73 | |
57 | // 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) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | |
76 | |
60 | // very ugly macro that basicaly declares and initialises a variable |
77 | // very ugly macro that basicaly declares and initialises a variable |
… | |
… | |
70 | |
87 | |
71 | // in range excluding end |
88 | // in range excluding end |
72 | #define IN_RANGE_EXC(val,beg,end) \ |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
73 | ((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)) |
74 | |
91 | |
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92 | void cleanup (const char *cause, bool make_core = false); |
75 | void fork_abort (const char *msg); |
93 | void fork_abort (const char *msg); |
76 | |
94 | |
77 | // 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, |
78 | // 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. |
79 | 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; } |
80 | 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; } |
81 | 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; } |
82 | |
100 | |
83 | 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)); } |
84 | |
105 | |
85 | template<typename T> |
106 | template<typename T> |
86 | static inline T |
107 | static inline T |
87 | 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) |
88 | { |
109 | { |
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172 | absdir (int d) |
193 | absdir (int d) |
173 | { |
194 | { |
174 | return ((d - 1) & 7) + 1; |
195 | return ((d - 1) & 7) + 1; |
175 | } |
196 | } |
176 | |
197 | |
177 | // makes dynamically allocated objects zero-initialised |
198 | extern ssize_t slice_alloc; // statistics |
178 | struct zero_initialised |
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179 | { |
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180 | void *operator new (size_t s, void *p) |
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181 | { |
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182 | memset (p, 0, s); |
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183 | return p; |
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184 | } |
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185 | |
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186 | void *operator new (size_t s) |
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187 | { |
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188 | return g_slice_alloc0 (s); |
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189 | } |
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190 | |
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191 | void *operator new[] (size_t s) |
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192 | { |
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193 | return g_slice_alloc0 (s); |
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194 | } |
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195 | |
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196 | void operator delete (void *p, size_t s) |
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197 | { |
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198 | g_slice_free1 (s, p); |
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199 | } |
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200 | |
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201 | void operator delete[] (void *p, size_t s) |
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202 | { |
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203 | g_slice_free1 (s, p); |
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204 | } |
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205 | }; |
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206 | |
199 | |
207 | void *salloc_ (int n) throw (std::bad_alloc); |
200 | void *salloc_ (int n) throw (std::bad_alloc); |
208 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
201 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
209 | |
202 | |
210 | // strictly the same as g_slice_alloc, but never returns 0 |
203 | // strictly the same as g_slice_alloc, but never returns 0 |
… | |
… | |
222 | |
215 | |
223 | // for symmetry |
216 | // for symmetry |
224 | template<typename T> |
217 | template<typename T> |
225 | inline void sfree (T *ptr, int n = 1) throw () |
218 | inline void sfree (T *ptr, int n = 1) throw () |
226 | { |
219 | { |
227 | #ifdef PREFER_MALLOC |
220 | if (expect_true (ptr)) |
228 | free (ptr); |
221 | { |
229 | #else |
222 | slice_alloc -= n * sizeof (T); |
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223 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
230 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
224 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
231 | #endif |
225 | assert (slice_alloc >= 0);//D |
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226 | } |
232 | } |
227 | } |
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228 | |
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229 | // makes dynamically allocated objects zero-initialised |
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230 | struct zero_initialised |
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231 | { |
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232 | void *operator new (size_t s, void *p) |
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233 | { |
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234 | memset (p, 0, s); |
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235 | return p; |
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236 | } |
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237 | |
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238 | void *operator new (size_t s) |
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239 | { |
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240 | return salloc0<char> (s); |
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241 | } |
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242 | |
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243 | void *operator new[] (size_t s) |
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244 | { |
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245 | return salloc0<char> (s); |
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246 | } |
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247 | |
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248 | void operator delete (void *p, size_t s) |
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249 | { |
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250 | sfree ((char *)p, s); |
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251 | } |
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252 | |
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253 | void operator delete[] (void *p, size_t s) |
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254 | { |
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255 | sfree ((char *)p, s); |
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256 | } |
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257 | }; |
233 | |
258 | |
234 | // a STL-compatible allocator that uses g_slice |
259 | // a STL-compatible allocator that uses g_slice |
235 | // boy, this is verbose |
260 | // boy, this is verbose |
236 | template<typename Tp> |
261 | template<typename Tp> |
237 | struct slice_allocator |
262 | struct slice_allocator |
… | |
… | |
249 | { |
274 | { |
250 | typedef slice_allocator<U> other; |
275 | typedef slice_allocator<U> other; |
251 | }; |
276 | }; |
252 | |
277 | |
253 | slice_allocator () throw () { } |
278 | slice_allocator () throw () { } |
254 | slice_allocator (const slice_allocator &o) throw () { } |
279 | slice_allocator (const slice_allocator &) throw () { } |
255 | template<typename Tp2> |
280 | template<typename Tp2> |
256 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
281 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
257 | |
282 | |
258 | ~slice_allocator () { } |
283 | ~slice_allocator () { } |
259 | |
284 | |
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268 | void deallocate (pointer p, size_type n) |
293 | void deallocate (pointer p, size_type n) |
269 | { |
294 | { |
270 | sfree<Tp> (p, n); |
295 | sfree<Tp> (p, n); |
271 | } |
296 | } |
272 | |
297 | |
273 | size_type max_size ()const throw () |
298 | size_type max_size () const throw () |
274 | { |
299 | { |
275 | return size_t (-1) / sizeof (Tp); |
300 | return size_t (-1) / sizeof (Tp); |
276 | } |
301 | } |
277 | |
302 | |
278 | void construct (pointer p, const Tp &val) |
303 | void construct (pointer p, const Tp &val) |
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333 | |
358 | |
334 | typedef tausworthe_random_generator rand_gen; |
359 | typedef tausworthe_random_generator rand_gen; |
335 | |
360 | |
336 | extern rand_gen rndm; |
361 | extern rand_gen rndm; |
337 | |
362 | |
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363 | INTERFACE_CLASS (attachable) |
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364 | struct refcnt_base |
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365 | { |
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366 | typedef int refcnt_t; |
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367 | mutable refcnt_t ACC (RW, refcnt); |
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368 | |
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369 | MTH void refcnt_inc () const { ++refcnt; } |
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370 | MTH void refcnt_dec () const { --refcnt; } |
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371 | |
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372 | refcnt_base () : refcnt (0) { } |
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373 | }; |
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374 | |
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375 | // to avoid branches with more advanced compilers |
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376 | extern refcnt_base::refcnt_t refcnt_dummy; |
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377 | |
338 | template<class T> |
378 | template<class T> |
339 | struct refptr |
379 | struct refptr |
340 | { |
380 | { |
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381 | // p if not null |
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382 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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383 | |
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384 | void refcnt_dec () |
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385 | { |
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386 | if (!is_constant (p)) |
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387 | --*refcnt_ref (); |
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388 | else if (p) |
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389 | --p->refcnt; |
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390 | } |
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391 | |
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392 | void refcnt_inc () |
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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 | |
341 | T *p; |
400 | T *p; |
342 | |
401 | |
343 | refptr () : p(0) { } |
402 | refptr () : p(0) { } |
344 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
403 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
345 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
404 | refptr (T *p) : p(p) { refcnt_inc (); } |
346 | ~refptr () { if (p) p->refcnt_dec (); } |
405 | ~refptr () { refcnt_dec (); } |
347 | |
406 | |
348 | const refptr<T> &operator =(T *o) |
407 | const refptr<T> &operator =(T *o) |
349 | { |
408 | { |
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409 | // if decrementing ever destroys we need to reverse the order here |
350 | if (p) p->refcnt_dec (); |
410 | refcnt_dec (); |
351 | p = o; |
411 | p = o; |
352 | if (p) p->refcnt_inc (); |
412 | refcnt_inc (); |
353 | |
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354 | return *this; |
413 | return *this; |
355 | } |
414 | } |
356 | |
415 | |
357 | const refptr<T> &operator =(const refptr<T> o) |
416 | const refptr<T> &operator =(const refptr<T> &o) |
358 | { |
417 | { |
359 | *this = o.p; |
418 | *this = o.p; |
360 | return *this; |
419 | return *this; |
361 | } |
420 | } |
362 | |
421 | |
363 | T &operator * () const { return *p; } |
422 | T &operator * () const { return *p; } |
364 | T *operator ->() const { return p; } |
423 | T *operator ->() const { return p; } |
365 | |
424 | |
366 | operator T *() const { return p; } |
425 | operator T *() const { return p; } |
367 | }; |
426 | }; |
368 | |
427 | |
369 | typedef refptr<maptile> maptile_ptr; |
428 | typedef refptr<maptile> maptile_ptr; |
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458 | return obj->*indexmember |
517 | return obj->*indexmember |
459 | ? this->begin () + obj->*indexmember - 1 |
518 | ? this->begin () + obj->*indexmember - 1 |
460 | : this->end (); |
519 | : this->end (); |
461 | } |
520 | } |
462 | |
521 | |
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522 | void push_back (T *obj) |
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523 | { |
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524 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
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525 | obj->*indexmember = this->size (); |
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526 | } |
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527 | |
463 | void insert (T *obj) |
528 | void insert (T *obj) |
464 | { |
529 | { |
465 | push_back (obj); |
530 | push_back (obj); |
466 | obj->*indexmember = this->size (); |
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467 | } |
531 | } |
468 | |
532 | |
469 | void insert (T &obj) |
533 | void insert (T &obj) |
470 | { |
534 | { |
471 | insert (&obj); |
535 | insert (&obj); |
… | |
… | |
501 | assign ((char *)&dst, src, N); |
565 | assign ((char *)&dst, src, N); |
502 | } |
566 | } |
503 | |
567 | |
504 | typedef double tstamp; |
568 | typedef double tstamp; |
505 | |
569 | |
506 | // return current time as timestampe |
570 | // return current time as timestamp |
507 | tstamp now (); |
571 | tstamp now (); |
508 | |
572 | |
509 | int similar_direction (int a, int b); |
573 | int similar_direction (int a, int b); |
510 | |
574 | |
511 | // like printf, but returns a std::string |
575 | // like sprintf, but returns a "static" buffer |
512 | const std::string format (const char *format, ...); |
576 | const char *format (const char *format, ...); |
513 | |
577 | |
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578 | ///////////////////////////////////////////////////////////////////////////// |
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579 | // threads, very very thin wrappers around pthreads |
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580 | |
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581 | struct thread |
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582 | { |
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583 | pthread_t id; |
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584 | |
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585 | void start (void *(*start_routine)(void *), void *arg = 0); |
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586 | |
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587 | void cancel () |
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588 | { |
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589 | pthread_cancel (id); |
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590 | } |
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591 | |
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592 | void *join () |
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593 | { |
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594 | void *ret; |
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595 | |
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596 | if (pthread_join (id, &ret)) |
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597 | cleanup ("pthread_join failed", 1); |
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598 | |
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599 | return ret; |
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600 | } |
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601 | }; |
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602 | |
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603 | // note that mutexes are not classes |
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604 | typedef pthread_mutex_t smutex; |
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605 | |
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606 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
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607 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
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608 | #else |
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609 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
514 | #endif |
610 | #endif |
515 | |
611 | |
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612 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
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613 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
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614 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
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615 | |
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616 | typedef pthread_cond_t scond; |
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617 | |
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618 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
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619 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
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620 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
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621 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
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622 | |
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623 | #endif |
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624 | |