1 | /* |
1 | /* |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
|
|
4 | * Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
6 | * |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | * the terms of the Affero GNU General Public License as published by the |
8 | * the terms of the Affero GNU General Public License as published by the |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | * option) any later version. |
10 | * option) any later version. |
10 | * |
11 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * GNU General Public License for more details. |
15 | * |
16 | * |
16 | * You should have received a copy of the Affero GNU General Public License |
17 | * You should have received a copy of the Affero GNU General Public License |
17 | * and the GNU General Public License along with this program. If not, see |
18 | * and the GNU General Public License along with this program. If not, see |
18 | * <http://www.gnu.org/licenses/>. |
19 | * <http://www.gnu.org/licenses/>. |
19 | * |
20 | * |
20 | * The authors can be reached via e-mail to <support@deliantra.net> |
21 | * The authors can be reached via e-mail to <support@deliantra.net> |
21 | */ |
22 | */ |
22 | |
23 | |
23 | #ifndef UTIL_H__ |
24 | #ifndef UTIL_H__ |
24 | #define UTIL_H__ |
25 | #define UTIL_H__ |
… | |
… | |
35 | #include <cmath> |
36 | #include <cmath> |
36 | #include <new> |
37 | #include <new> |
37 | #include <vector> |
38 | #include <vector> |
38 | |
39 | |
39 | #include <glib.h> |
40 | #include <glib.h> |
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41 | |
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42 | #include <flat_hash_map.hpp> |
40 | |
43 | |
41 | #include <shstr.h> |
44 | #include <shstr.h> |
42 | #include <traits.h> |
45 | #include <traits.h> |
43 | |
46 | |
44 | #if DEBUG_SALLOC |
47 | #if DEBUG_SALLOC |
… | |
… | |
55 | #endif |
58 | #endif |
56 | |
59 | |
57 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
60 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
61 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | |
62 | |
60 | #if cplusplus_does_not_suck |
63 | #if cplusplus_does_not_suck /* still sucks in codesize with gcc 6, although local types work now */ |
61 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
64 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
62 | template<typename T, int N> |
65 | template<typename T, int N> |
63 | static inline int array_length (const T (&arr)[N]) |
66 | static inline int array_length (const T (&arr)[N]) |
64 | { |
67 | { |
65 | return N; |
68 | return N; |
… | |
… | |
81 | |
84 | |
82 | // in range excluding end |
85 | // in range excluding end |
83 | #define IN_RANGE_EXC(val,beg,end) \ |
86 | #define IN_RANGE_EXC(val,beg,end) \ |
84 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
87 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
85 | |
88 | |
86 | void cleanup (const char *cause, bool make_core = false); |
89 | ecb_cold void cleanup (const char *cause, bool make_core = false); |
87 | void fork_abort (const char *msg); |
90 | ecb_cold void fork_abort (const char *msg); |
88 | |
91 | |
89 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
92 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
90 | // as a is often a constant while b is the variable. it is still a bug, though. |
93 | // as a is often a constant while b is the variable. it is still a bug, though. |
91 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
94 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
92 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
95 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
93 | 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; } |
96 | 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; } |
94 | |
97 | |
95 | template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); } |
98 | template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); } |
96 | template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
99 | template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
97 | template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = clamp (v, (T)a, (T)b); } |
100 | template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = clamp (v, (T)a, (T)b); } |
… | |
… | |
114 | |
117 | |
115 | // sign0 returns -1, 0 or +1 |
118 | // sign0 returns -1, 0 or +1 |
116 | template<typename T> |
119 | template<typename T> |
117 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
120 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
118 | |
121 | |
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122 | //clashes with C++0x |
119 | template<typename T, typename U> |
123 | template<typename T, typename U> |
120 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
124 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
121 | |
125 | |
122 | // div* only work correctly for div > 0 |
126 | // div* only work correctly for div > 0 |
123 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
127 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
… | |
… | |
236 | #if 0 |
240 | #if 0 |
237 | // and has a max. error of 6 in the range -100..+100. |
241 | // and has a max. error of 6 in the range -100..+100. |
238 | #else |
242 | #else |
239 | // and has a max. error of 9 in the range -100..+100. |
243 | // and has a max. error of 9 in the range -100..+100. |
240 | #endif |
244 | #endif |
241 | inline int |
245 | inline int |
242 | idistance (int dx, int dy) |
246 | idistance (int dx, int dy) |
243 | { |
247 | { |
244 | unsigned int dx_ = abs (dx); |
248 | unsigned int dx_ = abs (dx); |
245 | unsigned int dy_ = abs (dy); |
249 | unsigned int dy_ = abs (dy); |
246 | |
250 | |
247 | #if 0 |
251 | #if 0 |
248 | return dx_ > dy_ |
252 | return dx_ > dy_ |
… | |
… | |
251 | #else |
255 | #else |
252 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
256 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
253 | #endif |
257 | #endif |
254 | } |
258 | } |
255 | |
259 | |
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|
260 | // can be substantially faster than floor, if your value range allows for it |
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261 | template<typename T> |
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262 | inline T |
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263 | fastfloor (T x) |
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264 | { |
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265 | return std::floor (x); |
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266 | } |
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267 | |
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268 | inline float |
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269 | fastfloor (float x) |
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270 | { |
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271 | return sint32(x) - (x < 0); |
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272 | } |
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273 | |
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274 | inline double |
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275 | fastfloor (double x) |
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276 | { |
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277 | return sint64(x) - (x < 0); |
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278 | } |
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279 | |
256 | /* |
280 | /* |
257 | * absdir(int): Returns a number between 1 and 8, which represent |
281 | * absdir(int): Returns a number between 1 and 8, which represent |
258 | * the "absolute" direction of a number (it actually takes care of |
282 | * the "absolute" direction of a number (it actually takes care of |
259 | * "overflow" in previous calculations of a direction). |
283 | * "overflow" in previous calculations of a direction). |
260 | */ |
284 | */ |
… | |
… | |
262 | absdir (int d) |
286 | absdir (int d) |
263 | { |
287 | { |
264 | return ((d - 1) & 7) + 1; |
288 | return ((d - 1) & 7) + 1; |
265 | } |
289 | } |
266 | |
290 | |
267 | // avoid ctz name because netbsd or freebsd spams it's namespace with it |
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268 | #if GCC_VERSION(3,4) |
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269 | static inline int least_significant_bit (uint32_t x) |
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270 | { |
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271 | return __builtin_ctz (x); |
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272 | } |
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273 | #else |
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274 | int least_significant_bit (uint32_t x); |
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275 | #endif |
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276 | |
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277 | #define for_all_bits_sparse_32(mask, idxvar) \ |
291 | #define for_all_bits_sparse_32(mask, idxvar) \ |
278 | for (uint32_t idxvar, mask_ = mask; \ |
292 | for (uint32_t idxvar, mask_ = mask; \ |
279 | mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);) |
293 | mask_ && ((idxvar = ecb_ctz32 (mask_)), mask_ &= ~(1 << idxvar), 1);) |
280 | |
294 | |
281 | extern ssize_t slice_alloc; // statistics |
295 | extern ssize_t slice_alloc; // statistics |
282 | |
296 | |
283 | void *salloc_ (int n) throw (std::bad_alloc); |
297 | void *salloc_ (int n); |
284 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
298 | void *salloc_ (int n, void *src); |
285 | |
299 | |
286 | // strictly the same as g_slice_alloc, but never returns 0 |
300 | // strictly the same as g_slice_alloc, but never returns 0 |
287 | template<typename T> |
301 | template<typename T> |
288 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
302 | inline T *salloc (int n = 1) { return (T *)salloc_ (n * sizeof (T)); } |
289 | |
303 | |
290 | // also copies src into the new area, like "memdup" |
304 | // also copies src into the new area, like "memdup" |
291 | // if src is 0, clears the memory |
305 | // if src is 0, clears the memory |
292 | template<typename T> |
306 | template<typename T> |
293 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
307 | inline T *salloc (int n, T *src) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
294 | |
308 | |
295 | // clears the memory |
309 | // clears the memory |
296 | template<typename T> |
310 | template<typename T> |
297 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
311 | inline T *salloc0(int n = 1) { return (T *)salloc_ (n * sizeof (T), 0); } |
298 | |
312 | |
299 | // for symmetry |
313 | // for symmetry |
300 | template<typename T> |
314 | template<typename T> |
301 | inline void sfree (T *ptr, int n = 1) throw () |
315 | inline void sfree (T *ptr, int n = 1) noexcept |
302 | { |
316 | { |
303 | if (expect_true (ptr)) |
317 | if (expect_true (ptr)) |
304 | { |
318 | { |
305 | slice_alloc -= n * sizeof (T); |
319 | slice_alloc -= n * sizeof (T); |
306 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
320 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
307 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
321 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
308 | assert (slice_alloc >= 0);//D |
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309 | } |
322 | } |
310 | } |
323 | } |
311 | |
324 | |
312 | // nulls the pointer |
325 | // nulls the pointer |
313 | template<typename T> |
326 | template<typename T> |
314 | inline void sfree0 (T *&ptr, int n = 1) throw () |
327 | inline void sfree0 (T *&ptr, int n = 1) noexcept |
315 | { |
328 | { |
316 | sfree<T> (ptr, n); |
329 | sfree<T> (ptr, n); |
317 | ptr = 0; |
330 | ptr = 0; |
318 | } |
331 | } |
319 | |
332 | |
… | |
… | |
387 | typedef const Tp *const_pointer; |
400 | typedef const Tp *const_pointer; |
388 | typedef Tp &reference; |
401 | typedef Tp &reference; |
389 | typedef const Tp &const_reference; |
402 | typedef const Tp &const_reference; |
390 | typedef Tp value_type; |
403 | typedef Tp value_type; |
391 | |
404 | |
392 | template <class U> |
405 | template <class U> |
393 | struct rebind |
406 | struct rebind |
394 | { |
407 | { |
395 | typedef slice_allocator<U> other; |
408 | typedef slice_allocator<U> other; |
396 | }; |
409 | }; |
397 | |
410 | |
398 | slice_allocator () throw () { } |
411 | slice_allocator () noexcept { } |
399 | slice_allocator (const slice_allocator &) throw () { } |
412 | slice_allocator (const slice_allocator &) noexcept { } |
400 | template<typename Tp2> |
413 | template<typename Tp2> |
401 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
414 | slice_allocator (const slice_allocator<Tp2> &) noexcept { } |
402 | |
415 | |
403 | ~slice_allocator () { } |
416 | ~slice_allocator () { } |
404 | |
417 | |
405 | pointer address (reference x) const { return &x; } |
418 | pointer address (reference x) const { return &x; } |
406 | const_pointer address (const_reference x) const { return &x; } |
419 | const_pointer address (const_reference x) const { return &x; } |
… | |
… | |
413 | void deallocate (pointer p, size_type n) |
426 | void deallocate (pointer p, size_type n) |
414 | { |
427 | { |
415 | sfree<Tp> (p, n); |
428 | sfree<Tp> (p, n); |
416 | } |
429 | } |
417 | |
430 | |
418 | size_type max_size () const throw () |
431 | size_type max_size () const noexcept |
419 | { |
432 | { |
420 | return size_t (-1) / sizeof (Tp); |
433 | return size_t (-1) / sizeof (Tp); |
421 | } |
434 | } |
422 | |
435 | |
423 | void construct (pointer p, const Tp &val) |
436 | void construct (pointer p, const Tp &val) |
… | |
… | |
426 | } |
439 | } |
427 | |
440 | |
428 | void destroy (pointer p) |
441 | void destroy (pointer p) |
429 | { |
442 | { |
430 | p->~Tp (); |
443 | p->~Tp (); |
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444 | } |
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445 | }; |
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446 | |
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447 | // basically a memory area, but refcounted |
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448 | struct refcnt_buf |
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449 | { |
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450 | char *data; |
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451 | |
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452 | refcnt_buf (size_t size = 0); |
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453 | refcnt_buf (void *data, size_t size); |
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454 | |
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455 | refcnt_buf (const refcnt_buf &src) |
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456 | { |
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457 | data = src.data; |
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458 | inc (); |
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459 | } |
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460 | |
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461 | ~refcnt_buf (); |
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462 | |
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463 | refcnt_buf &operator =(const refcnt_buf &src); |
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464 | |
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465 | operator char *() |
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466 | { |
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467 | return data; |
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468 | } |
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469 | |
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470 | size_t size () const |
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471 | { |
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472 | return _size (); |
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473 | } |
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474 | |
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475 | protected: |
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476 | enum { |
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477 | overhead = sizeof (uint32_t) * 2 |
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478 | }; |
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479 | |
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480 | uint32_t &_size () const |
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481 | { |
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482 | return ((unsigned int *)data)[-2]; |
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483 | } |
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484 | |
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485 | uint32_t &_refcnt () const |
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486 | { |
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487 | return ((unsigned int *)data)[-1]; |
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488 | } |
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489 | |
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490 | void _alloc (uint32_t size) |
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491 | { |
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492 | data = ((char *)salloc<char> (size + overhead)) + overhead; |
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493 | _size () = size; |
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494 | _refcnt () = 1; |
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495 | } |
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496 | |
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497 | void _dealloc (); |
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498 | |
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499 | void inc () |
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500 | { |
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501 | ++_refcnt (); |
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502 | } |
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503 | |
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504 | void dec () |
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505 | { |
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506 | if (!--_refcnt ()) |
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507 | _dealloc (); |
431 | } |
508 | } |
432 | }; |
509 | }; |
433 | |
510 | |
434 | INTERFACE_CLASS (attachable) |
511 | INTERFACE_CLASS (attachable) |
435 | struct refcnt_base |
512 | struct refcnt_base |
… | |
… | |
452 | // p if not null |
529 | // p if not null |
453 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
530 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
454 | |
531 | |
455 | void refcnt_dec () |
532 | void refcnt_dec () |
456 | { |
533 | { |
457 | if (!is_constant (p)) |
534 | if (!ecb_is_constant (p)) |
458 | --*refcnt_ref (); |
535 | --*refcnt_ref (); |
459 | else if (p) |
536 | else if (p) |
460 | --p->refcnt; |
537 | --p->refcnt; |
461 | } |
538 | } |
462 | |
539 | |
463 | void refcnt_inc () |
540 | void refcnt_inc () |
464 | { |
541 | { |
465 | if (!is_constant (p)) |
542 | if (!ecb_is_constant (p)) |
466 | ++*refcnt_ref (); |
543 | ++*refcnt_ref (); |
467 | else if (p) |
544 | else if (p) |
468 | ++p->refcnt; |
545 | ++p->refcnt; |
469 | } |
546 | } |
470 | |
547 | |
… | |
… | |
511 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
588 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
512 | // it is about twice as fast as the one-at-a-time one, |
589 | // it is about twice as fast as the one-at-a-time one, |
513 | // with good distribution. |
590 | // with good distribution. |
514 | // FNV-1a is faster on many cpus because the multiplication |
591 | // FNV-1a is faster on many cpus because the multiplication |
515 | // runs concurrently with the looping logic. |
592 | // runs concurrently with the looping logic. |
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593 | // we modify the hash a bit to improve its distribution |
516 | uint32_t hash = STRHSH_NULL; |
594 | uint32_t hash = STRHSH_NULL; |
517 | |
595 | |
518 | while (*s) |
596 | while (*s) |
519 | hash = (hash ^ *s++) * 16777619U; |
597 | hash = (hash ^ *s++) * 16777619U; |
520 | |
598 | |
521 | return hash; |
599 | return hash ^ (hash >> 16); |
522 | } |
600 | } |
523 | |
601 | |
524 | static inline uint32_t |
602 | static inline uint32_t |
525 | memhsh (const char *s, size_t len) |
603 | memhsh (const char *s, size_t len) |
526 | { |
604 | { |
527 | uint32_t hash = STRHSH_NULL; |
605 | uint32_t hash = STRHSH_NULL; |
528 | |
606 | |
529 | while (len--) |
607 | while (len--) |
530 | hash = (hash ^ *s++) * 16777619U; |
608 | hash = (hash ^ *s++) * 16777619U; |
531 | |
609 | |
532 | return hash; |
610 | return hash; |
533 | } |
611 | } |
… | |
… | |
541 | |
619 | |
542 | std::size_t operator ()(const shstr &s) const |
620 | std::size_t operator ()(const shstr &s) const |
543 | { |
621 | { |
544 | return strhsh (s); |
622 | return strhsh (s); |
545 | } |
623 | } |
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624 | |
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625 | typedef ska::power_of_two_hash_policy hash_policy; |
546 | }; |
626 | }; |
547 | |
627 | |
548 | struct str_equal |
628 | struct str_equal |
549 | { |
629 | { |
550 | bool operator ()(const char *a, const char *b) const |
630 | bool operator ()(const char *a, const char *b) const |
… | |
… | |
576 | } |
656 | } |
577 | }; |
657 | }; |
578 | |
658 | |
579 | // This container blends advantages of linked lists |
659 | // This container blends advantages of linked lists |
580 | // (efficiency) with vectors (random access) by |
660 | // (efficiency) with vectors (random access) by |
581 | // by using an unordered vector and storing the vector |
661 | // using an unordered vector and storing the vector |
582 | // index inside the object. |
662 | // index inside the object. |
583 | // |
663 | // |
584 | // + memory-efficient on most 64 bit archs |
664 | // + memory-efficient on most 64 bit archs |
585 | // + O(1) insert/remove |
665 | // + O(1) insert/remove |
586 | // + free unique (but varying) id for inserted objects |
666 | // + free unique (but varying) id for inserted objects |
… | |
… | |
623 | insert (&obj); |
703 | insert (&obj); |
624 | } |
704 | } |
625 | |
705 | |
626 | void erase (T *obj) |
706 | void erase (T *obj) |
627 | { |
707 | { |
628 | unsigned int pos = obj->*indexmember; |
708 | object_vector_index pos = obj->*indexmember; |
629 | obj->*indexmember = 0; |
709 | obj->*indexmember = 0; |
630 | |
710 | |
631 | if (pos < this->size ()) |
711 | if (pos < this->size ()) |
632 | { |
712 | { |
633 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
713 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
… | |
… | |
729 | |
809 | |
730 | int similar_direction (int a, int b); |
810 | int similar_direction (int a, int b); |
731 | |
811 | |
732 | // like v?sprintf, but returns a "static" buffer |
812 | // like v?sprintf, but returns a "static" buffer |
733 | char *vformat (const char *format, va_list ap); |
813 | char *vformat (const char *format, va_list ap); |
734 | char *format (const char *format, ...) attribute ((format (printf, 1, 2))); |
814 | char *format (const char *format, ...) ecb_attribute ((format (printf, 1, 2))); |
735 | |
815 | |
736 | // safety-check player input which will become object->msg |
816 | // safety-check player input which will become object->msg |
737 | bool msg_is_safe (const char *msg); |
817 | bool msg_is_safe (const char *msg); |
738 | |
818 | |
739 | ///////////////////////////////////////////////////////////////////////////// |
819 | ///////////////////////////////////////////////////////////////////////////// |