|
|
1 | /* |
|
|
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
|
|
3 | * |
|
|
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
|
|
5 | * |
|
|
6 | * 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 | * Free Software Foundation, either version 3 of the License, or (at your |
|
|
9 | * 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 Affero GNU General Public License |
|
|
17 | * and the GNU General Public License along with this program. If not, see |
|
|
18 | * <http://www.gnu.org/licenses/>. |
|
|
19 | * |
|
|
20 | * The authors can be reached via e-mail to <support@deliantra.net> |
|
|
21 | */ |
|
|
22 | |
1 | #ifndef UTIL_H__ |
23 | #ifndef UTIL_H__ |
2 | #define UTIL_H__ |
24 | #define UTIL_H__ |
3 | |
25 | |
4 | #if __GNUC__ >= 3 |
26 | #include <compiler.h> |
5 | # define is_constant(c) __builtin_constant_p (c) |
27 | |
6 | #else |
28 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
7 | # define is_constant(c) 0 |
29 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
8 | #endif |
30 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
|
|
31 | |
|
|
32 | #include <pthread.h> |
9 | |
33 | |
10 | #include <cstddef> |
34 | #include <cstddef> |
11 | #include <cmath> |
35 | #include <cmath> |
12 | #include <new> |
36 | #include <new> |
13 | #include <vector> |
37 | #include <vector> |
… | |
… | |
15 | #include <glib.h> |
39 | #include <glib.h> |
16 | |
40 | |
17 | #include <shstr.h> |
41 | #include <shstr.h> |
18 | #include <traits.h> |
42 | #include <traits.h> |
19 | |
43 | |
|
|
44 | #if DEBUG_SALLOC |
|
|
45 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
|
|
46 | # define g_slice_alloc(s) debug_slice_alloc(s) |
|
|
47 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
|
|
48 | void *g_slice_alloc (unsigned long size); |
|
|
49 | void *g_slice_alloc0 (unsigned long size); |
|
|
50 | void g_slice_free1 (unsigned long size, void *ptr); |
|
|
51 | #elif PREFER_MALLOC |
|
|
52 | # define g_slice_alloc0(s) calloc (1, (s)) |
|
|
53 | # define g_slice_alloc(s) malloc ((s)) |
|
|
54 | # define g_slice_free1(s,p) free ((p)) |
|
|
55 | #endif |
|
|
56 | |
20 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
57 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
21 | #define AUTODECL(var,expr) typeof(expr) var = (expr) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
22 | |
59 | |
|
|
60 | #if cplusplus_does_not_suck |
|
|
61 | // 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> |
|
|
63 | static inline int array_length (const T (&arr)[N]) |
|
|
64 | { |
|
|
65 | return N; |
|
|
66 | } |
|
|
67 | #else |
|
|
68 | #define array_length(name) (sizeof (name) / sizeof (name [0])) |
|
|
69 | #endif |
|
|
70 | |
23 | // very ugly macro that basicaly declares and initialises a variable |
71 | // very ugly macro that basically declares and initialises a variable |
24 | // that is in scope for the next statement only |
72 | // that is in scope for the next statement only |
25 | // works only for stuff that can be assigned 0 and converts to false |
73 | // works only for stuff that can be assigned 0 and converts to false |
26 | // (note: works great for pointers) |
74 | // (note: works great for pointers) |
27 | // most ugly macro I ever wrote |
75 | // most ugly macro I ever wrote |
28 | #define declvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
76 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
29 | |
77 | |
30 | // in range including end |
78 | // in range including end |
31 | #define IN_RANGE_INC(val,beg,end) \ |
79 | #define IN_RANGE_INC(val,beg,end) \ |
32 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
80 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
33 | |
81 | |
34 | // in range excluding end |
82 | // in range excluding end |
35 | #define IN_RANGE_EXC(val,beg,end) \ |
83 | #define IN_RANGE_EXC(val,beg,end) \ |
36 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
84 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
37 | |
85 | |
|
|
86 | void cleanup (const char *cause, bool make_core = false); |
|
|
87 | void fork_abort (const char *msg); |
|
|
88 | |
|
|
89 | // 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. |
|
|
91 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
|
|
92 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : 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; } |
|
|
94 | |
|
|
95 | 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); } |
|
|
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); } |
|
|
98 | |
|
|
99 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
|
|
100 | |
|
|
101 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
|
|
102 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
|
|
103 | |
|
|
104 | // sign returns -1 or +1 |
|
|
105 | template<typename T> |
|
|
106 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
|
|
107 | // relies on 2c representation |
|
|
108 | template<> |
|
|
109 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
|
|
110 | template<> |
|
|
111 | inline sint16 sign (sint16 v) { return 1 - (sint16 (uint16 (v) >> 15) * 2); } |
|
|
112 | template<> |
|
|
113 | inline sint32 sign (sint32 v) { return 1 - (sint32 (uint32 (v) >> 31) * 2); } |
|
|
114 | |
|
|
115 | // sign0 returns -1, 0 or +1 |
|
|
116 | template<typename T> |
|
|
117 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
|
|
118 | |
|
|
119 | template<typename T, typename U> |
|
|
120 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
|
|
121 | |
|
|
122 | // div* only work correctly for div > 0 |
|
|
123 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
|
|
124 | template<typename T> static inline T div (T val, T div) |
|
|
125 | { |
|
|
126 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
|
|
127 | } |
|
|
128 | |
|
|
129 | template<> inline float div (float val, float div) { return val / div; } |
|
|
130 | template<> inline double div (double val, double div) { return val / div; } |
|
|
131 | |
|
|
132 | // div, round-up |
|
|
133 | template<typename T> static inline T div_ru (T val, T div) |
|
|
134 | { |
|
|
135 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
|
|
136 | } |
|
|
137 | // div, round-down |
|
|
138 | template<typename T> static inline T div_rd (T val, T div) |
|
|
139 | { |
|
|
140 | return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div; |
|
|
141 | } |
|
|
142 | |
|
|
143 | // lerp* only work correctly for min_in < max_in |
|
|
144 | // Linear intERPolate, scales val from min_in..max_in to min_out..max_out |
|
|
145 | template<typename T> |
|
|
146 | static inline T |
|
|
147 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
|
|
148 | { |
|
|
149 | return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
|
|
150 | } |
|
|
151 | |
|
|
152 | // lerp, round-down |
|
|
153 | template<typename T> |
|
|
154 | static inline T |
|
|
155 | lerp_rd (T val, T min_in, T max_in, T min_out, T max_out) |
|
|
156 | { |
|
|
157 | return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
|
|
158 | } |
|
|
159 | |
|
|
160 | // lerp, round-up |
|
|
161 | template<typename T> |
|
|
162 | static inline T |
|
|
163 | lerp_ru (T val, T min_in, T max_in, T min_out, T max_out) |
|
|
164 | { |
|
|
165 | return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
|
|
166 | } |
|
|
167 | |
|
|
168 | // lots of stuff taken from FXT |
|
|
169 | |
|
|
170 | /* Rotate right. This is used in various places for checksumming */ |
|
|
171 | //TODO: that sucks, use a better checksum algo |
|
|
172 | static inline uint32_t |
|
|
173 | rotate_right (uint32_t c, uint32_t count = 1) |
|
|
174 | { |
|
|
175 | return (c << (32 - count)) | (c >> count); |
|
|
176 | } |
|
|
177 | |
|
|
178 | static inline uint32_t |
|
|
179 | rotate_left (uint32_t c, uint32_t count = 1) |
|
|
180 | { |
|
|
181 | return (c >> (32 - count)) | (c << count); |
|
|
182 | } |
|
|
183 | |
|
|
184 | // Return abs(a-b) |
|
|
185 | // Both a and b must not have the most significant bit set |
|
|
186 | static inline uint32_t |
|
|
187 | upos_abs_diff (uint32_t a, uint32_t b) |
|
|
188 | { |
|
|
189 | long d1 = b - a; |
|
|
190 | long d2 = (d1 & (d1 >> 31)) << 1; |
|
|
191 | |
|
|
192 | return d1 - d2; // == (b - d) - (a + d); |
|
|
193 | } |
|
|
194 | |
|
|
195 | // Both a and b must not have the most significant bit set |
|
|
196 | static inline uint32_t |
|
|
197 | upos_min (uint32_t a, uint32_t b) |
|
|
198 | { |
|
|
199 | int32_t d = b - a; |
|
|
200 | d &= d >> 31; |
|
|
201 | return a + d; |
|
|
202 | } |
|
|
203 | |
|
|
204 | // Both a and b must not have the most significant bit set |
|
|
205 | static inline uint32_t |
|
|
206 | upos_max (uint32_t a, uint32_t b) |
|
|
207 | { |
|
|
208 | int32_t d = b - a; |
|
|
209 | d &= d >> 31; |
|
|
210 | return b - d; |
|
|
211 | } |
|
|
212 | |
38 | // this is much faster than crossfires original algorithm |
213 | // this is much faster than crossfire's original algorithm |
39 | // on modern cpus |
214 | // on modern cpus |
40 | inline int |
215 | inline int |
41 | isqrt (int n) |
216 | isqrt (int n) |
42 | { |
217 | { |
43 | return (int)sqrtf ((float)n); |
218 | return (int)sqrtf ((float)n); |
|
|
219 | } |
|
|
220 | |
|
|
221 | // this is kind of like the ^^ operator, if it would exist, without sequence point. |
|
|
222 | // more handy than it looks like, due to the implicit !! done on its arguments |
|
|
223 | inline bool |
|
|
224 | logical_xor (bool a, bool b) |
|
|
225 | { |
|
|
226 | return a != b; |
|
|
227 | } |
|
|
228 | |
|
|
229 | inline bool |
|
|
230 | logical_implies (bool a, bool b) |
|
|
231 | { |
|
|
232 | return a <= b; |
44 | } |
233 | } |
45 | |
234 | |
46 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
235 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
47 | #if 0 |
236 | #if 0 |
48 | // and has a max. error of 6 in the range -100..+100. |
237 | // and has a max. error of 6 in the range -100..+100. |
… | |
… | |
73 | absdir (int d) |
262 | absdir (int d) |
74 | { |
263 | { |
75 | return ((d - 1) & 7) + 1; |
264 | return ((d - 1) & 7) + 1; |
76 | } |
265 | } |
77 | |
266 | |
|
|
267 | // avoid ctz name because netbsd or freebsd spams it's namespace with it |
|
|
268 | #if GCC_VERSION(3,4) |
|
|
269 | static inline int least_significant_bit (uint32_t x) |
|
|
270 | { |
|
|
271 | return __builtin_ctz (x); |
|
|
272 | } |
|
|
273 | #else |
|
|
274 | int least_significant_bit (uint32_t x); |
|
|
275 | #endif |
|
|
276 | |
|
|
277 | #define for_all_bits_sparse_32(mask, idxvar) \ |
|
|
278 | for (uint32_t idxvar, mask_ = mask; \ |
|
|
279 | mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);) |
|
|
280 | |
|
|
281 | extern ssize_t slice_alloc; // statistics |
|
|
282 | |
|
|
283 | void *salloc_ (int n) throw (std::bad_alloc); |
|
|
284 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
|
|
285 | |
|
|
286 | // strictly the same as g_slice_alloc, but never returns 0 |
|
|
287 | template<typename T> |
|
|
288 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
|
|
289 | |
|
|
290 | // also copies src into the new area, like "memdup" |
|
|
291 | // if src is 0, clears the memory |
|
|
292 | template<typename T> |
|
|
293 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
|
|
294 | |
|
|
295 | // clears the memory |
|
|
296 | template<typename T> |
|
|
297 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
|
|
298 | |
|
|
299 | // for symmetry |
|
|
300 | template<typename T> |
|
|
301 | inline void sfree (T *ptr, int n = 1) throw () |
|
|
302 | { |
|
|
303 | if (expect_true (ptr)) |
|
|
304 | { |
|
|
305 | slice_alloc -= n * sizeof (T); |
|
|
306 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
|
|
307 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
|
|
308 | assert (slice_alloc >= 0);//D |
|
|
309 | } |
|
|
310 | } |
|
|
311 | |
|
|
312 | // nulls the pointer |
|
|
313 | template<typename T> |
|
|
314 | inline void sfree0 (T *&ptr, int n = 1) throw () |
|
|
315 | { |
|
|
316 | sfree<T> (ptr, n); |
|
|
317 | ptr = 0; |
|
|
318 | } |
|
|
319 | |
78 | // makes dynamically allocated objects zero-initialised |
320 | // makes dynamically allocated objects zero-initialised |
79 | struct zero_initialised |
321 | struct zero_initialised |
80 | { |
322 | { |
81 | void *operator new (size_t s, void *p) |
323 | void *operator new (size_t s, void *p) |
82 | { |
324 | { |
… | |
… | |
84 | return p; |
326 | return p; |
85 | } |
327 | } |
86 | |
328 | |
87 | void *operator new (size_t s) |
329 | void *operator new (size_t s) |
88 | { |
330 | { |
89 | return g_slice_alloc0 (s); |
331 | return salloc0<char> (s); |
90 | } |
332 | } |
91 | |
333 | |
92 | void *operator new[] (size_t s) |
334 | void *operator new[] (size_t s) |
93 | { |
335 | { |
94 | return g_slice_alloc0 (s); |
336 | return salloc0<char> (s); |
95 | } |
337 | } |
96 | |
338 | |
97 | void operator delete (void *p, size_t s) |
339 | void operator delete (void *p, size_t s) |
98 | { |
340 | { |
99 | g_slice_free1 (s, p); |
341 | sfree ((char *)p, s); |
100 | } |
342 | } |
101 | |
343 | |
102 | void operator delete[] (void *p, size_t s) |
344 | void operator delete[] (void *p, size_t s) |
103 | { |
345 | { |
104 | g_slice_free1 (s, p); |
346 | sfree ((char *)p, s); |
105 | } |
347 | } |
106 | }; |
348 | }; |
107 | |
349 | |
108 | void *salloc_ (int n) throw (std::bad_alloc); |
350 | // makes dynamically allocated objects zero-initialised |
109 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
351 | struct slice_allocated |
110 | |
|
|
111 | // strictly the same as g_slice_alloc, but never returns 0 |
|
|
112 | template<typename T> |
|
|
113 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
|
|
114 | |
|
|
115 | // also copies src into the new area, like "memdup" |
|
|
116 | // if src is 0, clears the memory |
|
|
117 | template<typename T> |
|
|
118 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
|
|
119 | |
|
|
120 | // clears the memory |
|
|
121 | template<typename T> |
|
|
122 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
|
|
123 | |
|
|
124 | // for symmetry |
|
|
125 | template<typename T> |
|
|
126 | inline void sfree (T *ptr, int n = 1) throw () |
|
|
127 | { |
352 | { |
128 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
353 | void *operator new (size_t s, void *p) |
129 | } |
354 | { |
|
|
355 | return p; |
|
|
356 | } |
|
|
357 | |
|
|
358 | void *operator new (size_t s) |
|
|
359 | { |
|
|
360 | return salloc<char> (s); |
|
|
361 | } |
|
|
362 | |
|
|
363 | void *operator new[] (size_t s) |
|
|
364 | { |
|
|
365 | return salloc<char> (s); |
|
|
366 | } |
|
|
367 | |
|
|
368 | void operator delete (void *p, size_t s) |
|
|
369 | { |
|
|
370 | sfree ((char *)p, s); |
|
|
371 | } |
|
|
372 | |
|
|
373 | void operator delete[] (void *p, size_t s) |
|
|
374 | { |
|
|
375 | sfree ((char *)p, s); |
|
|
376 | } |
|
|
377 | }; |
130 | |
378 | |
131 | // a STL-compatible allocator that uses g_slice |
379 | // a STL-compatible allocator that uses g_slice |
132 | // boy, this is verbose |
380 | // boy, this is verbose |
133 | template<typename Tp> |
381 | template<typename Tp> |
134 | struct slice_allocator |
382 | struct slice_allocator |
… | |
… | |
146 | { |
394 | { |
147 | typedef slice_allocator<U> other; |
395 | typedef slice_allocator<U> other; |
148 | }; |
396 | }; |
149 | |
397 | |
150 | slice_allocator () throw () { } |
398 | slice_allocator () throw () { } |
151 | slice_allocator (const slice_allocator &o) throw () { } |
399 | slice_allocator (const slice_allocator &) throw () { } |
152 | template<typename Tp2> |
400 | template<typename Tp2> |
153 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
401 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
154 | |
402 | |
155 | ~slice_allocator () { } |
403 | ~slice_allocator () { } |
156 | |
404 | |
… | |
… | |
165 | void deallocate (pointer p, size_type n) |
413 | void deallocate (pointer p, size_type n) |
166 | { |
414 | { |
167 | sfree<Tp> (p, n); |
415 | sfree<Tp> (p, n); |
168 | } |
416 | } |
169 | |
417 | |
170 | size_type max_size ()const throw () |
418 | size_type max_size () const throw () |
171 | { |
419 | { |
172 | return size_t (-1) / sizeof (Tp); |
420 | return size_t (-1) / sizeof (Tp); |
173 | } |
421 | } |
174 | |
422 | |
175 | void construct (pointer p, const Tp &val) |
423 | void construct (pointer p, const Tp &val) |
… | |
… | |
180 | void destroy (pointer p) |
428 | void destroy (pointer p) |
181 | { |
429 | { |
182 | p->~Tp (); |
430 | p->~Tp (); |
183 | } |
431 | } |
184 | }; |
432 | }; |
|
|
433 | |
|
|
434 | INTERFACE_CLASS (attachable) |
|
|
435 | struct refcnt_base |
|
|
436 | { |
|
|
437 | typedef int refcnt_t; |
|
|
438 | mutable refcnt_t ACC (RW, refcnt); |
|
|
439 | |
|
|
440 | MTH void refcnt_inc () const { ++refcnt; } |
|
|
441 | MTH void refcnt_dec () const { --refcnt; } |
|
|
442 | |
|
|
443 | refcnt_base () : refcnt (0) { } |
|
|
444 | }; |
|
|
445 | |
|
|
446 | // to avoid branches with more advanced compilers |
|
|
447 | extern refcnt_base::refcnt_t refcnt_dummy; |
185 | |
448 | |
186 | template<class T> |
449 | template<class T> |
187 | struct refptr |
450 | struct refptr |
188 | { |
451 | { |
|
|
452 | // p if not null |
|
|
453 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
|
|
454 | |
|
|
455 | void refcnt_dec () |
|
|
456 | { |
|
|
457 | if (!is_constant (p)) |
|
|
458 | --*refcnt_ref (); |
|
|
459 | else if (p) |
|
|
460 | --p->refcnt; |
|
|
461 | } |
|
|
462 | |
|
|
463 | void refcnt_inc () |
|
|
464 | { |
|
|
465 | if (!is_constant (p)) |
|
|
466 | ++*refcnt_ref (); |
|
|
467 | else if (p) |
|
|
468 | ++p->refcnt; |
|
|
469 | } |
|
|
470 | |
189 | T *p; |
471 | T *p; |
190 | |
472 | |
191 | refptr () : p(0) { } |
473 | refptr () : p(0) { } |
192 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
474 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
193 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
475 | refptr (T *p) : p(p) { refcnt_inc (); } |
194 | ~refptr () { if (p) p->refcnt_dec (); } |
476 | ~refptr () { refcnt_dec (); } |
195 | |
477 | |
196 | const refptr<T> &operator =(T *o) |
478 | const refptr<T> &operator =(T *o) |
197 | { |
479 | { |
|
|
480 | // if decrementing ever destroys we need to reverse the order here |
198 | if (p) p->refcnt_dec (); |
481 | refcnt_dec (); |
199 | p = o; |
482 | p = o; |
200 | if (p) p->refcnt_inc (); |
483 | refcnt_inc (); |
201 | |
|
|
202 | return *this; |
484 | return *this; |
203 | } |
485 | } |
204 | |
486 | |
205 | const refptr<T> &operator =(const refptr<T> o) |
487 | const refptr<T> &operator =(const refptr<T> &o) |
206 | { |
488 | { |
207 | *this = o.p; |
489 | *this = o.p; |
208 | return *this; |
490 | return *this; |
209 | } |
491 | } |
210 | |
492 | |
211 | T &operator * () const { return *p; } |
493 | T &operator * () const { return *p; } |
212 | T *operator ->() const { return p; } |
494 | T *operator ->() const { return p; } |
213 | |
495 | |
214 | operator T *() const { return p; } |
496 | operator T *() const { return p; } |
215 | }; |
497 | }; |
216 | |
498 | |
217 | typedef refptr<maptile> maptile_ptr; |
499 | typedef refptr<maptile> maptile_ptr; |
218 | typedef refptr<object> object_ptr; |
500 | typedef refptr<object> object_ptr; |
219 | typedef refptr<archetype> arch_ptr; |
501 | typedef refptr<archetype> arch_ptr; |
220 | typedef refptr<client> client_ptr; |
502 | typedef refptr<client> client_ptr; |
221 | typedef refptr<player> player_ptr; |
503 | typedef refptr<player> player_ptr; |
|
|
504 | typedef refptr<region> region_ptr; |
|
|
505 | |
|
|
506 | #define STRHSH_NULL 2166136261 |
|
|
507 | |
|
|
508 | static inline uint32_t |
|
|
509 | strhsh (const char *s) |
|
|
510 | { |
|
|
511 | // 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, |
|
|
513 | // with good distribution. |
|
|
514 | // FNV-1a is faster on many cpus because the multiplication |
|
|
515 | // runs concurrently with the looping logic. |
|
|
516 | uint32_t hash = STRHSH_NULL; |
|
|
517 | |
|
|
518 | while (*s) |
|
|
519 | hash = (hash ^ *s++) * 16777619U; |
|
|
520 | |
|
|
521 | return hash; |
|
|
522 | } |
|
|
523 | |
|
|
524 | static inline uint32_t |
|
|
525 | memhsh (const char *s, size_t len) |
|
|
526 | { |
|
|
527 | uint32_t hash = STRHSH_NULL; |
|
|
528 | |
|
|
529 | while (len--) |
|
|
530 | hash = (hash ^ *s++) * 16777619U; |
|
|
531 | |
|
|
532 | return hash; |
|
|
533 | } |
222 | |
534 | |
223 | struct str_hash |
535 | struct str_hash |
224 | { |
536 | { |
225 | std::size_t operator ()(const char *s) const |
537 | std::size_t operator ()(const char *s) const |
226 | { |
538 | { |
227 | unsigned long hash = 0; |
|
|
228 | |
|
|
229 | /* use the one-at-a-time hash function, which supposedly is |
|
|
230 | * better than the djb2-like one used by perl5.005, but |
|
|
231 | * certainly is better then the bug used here before. |
|
|
232 | * see http://burtleburtle.net/bob/hash/doobs.html |
|
|
233 | */ |
|
|
234 | while (*s) |
|
|
235 | { |
|
|
236 | hash += *s++; |
|
|
237 | hash += hash << 10; |
|
|
238 | hash ^= hash >> 6; |
|
|
239 | } |
|
|
240 | |
|
|
241 | hash += hash << 3; |
|
|
242 | hash ^= hash >> 11; |
|
|
243 | hash += hash << 15; |
|
|
244 | |
|
|
245 | return hash; |
539 | return strhsh (s); |
|
|
540 | } |
|
|
541 | |
|
|
542 | std::size_t operator ()(const shstr &s) const |
|
|
543 | { |
|
|
544 | return strhsh (s); |
246 | } |
545 | } |
247 | }; |
546 | }; |
248 | |
547 | |
249 | struct str_equal |
548 | struct str_equal |
250 | { |
549 | { |
… | |
… | |
252 | { |
551 | { |
253 | return !strcmp (a, b); |
552 | return !strcmp (a, b); |
254 | } |
553 | } |
255 | }; |
554 | }; |
256 | |
555 | |
|
|
556 | // Mostly the same as std::vector, but insert/erase can reorder |
|
|
557 | // the elements, making append(=insert)/remove O(1) instead of O(n). |
|
|
558 | // |
|
|
559 | // NOTE: only some forms of erase are available |
257 | template<class T> |
560 | template<class T> |
258 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
561 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
259 | { |
562 | { |
260 | typedef typename unordered_vector::iterator iterator; |
563 | typedef typename unordered_vector::iterator iterator; |
261 | |
564 | |
… | |
… | |
271 | { |
574 | { |
272 | erase ((unsigned int )(i - this->begin ())); |
575 | erase ((unsigned int )(i - this->begin ())); |
273 | } |
576 | } |
274 | }; |
577 | }; |
275 | |
578 | |
276 | template<class T, int T::* index> |
579 | // This container blends advantages of linked lists |
|
|
580 | // (efficiency) with vectors (random access) by |
|
|
581 | // by using an unordered vector and storing the vector |
|
|
582 | // index inside the object. |
|
|
583 | // |
|
|
584 | // + memory-efficient on most 64 bit archs |
|
|
585 | // + O(1) insert/remove |
|
|
586 | // + free unique (but varying) id for inserted objects |
|
|
587 | // + cache-friendly iteration |
|
|
588 | // - only works for pointers to structs |
|
|
589 | // |
|
|
590 | // NOTE: only some forms of erase/insert are available |
|
|
591 | typedef int object_vector_index; |
|
|
592 | |
|
|
593 | template<class T, object_vector_index T::*indexmember> |
277 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
594 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
278 | { |
595 | { |
|
|
596 | typedef typename object_vector::iterator iterator; |
|
|
597 | |
|
|
598 | bool contains (const T *obj) const |
|
|
599 | { |
|
|
600 | return obj->*indexmember; |
|
|
601 | } |
|
|
602 | |
|
|
603 | iterator find (const T *obj) |
|
|
604 | { |
|
|
605 | return obj->*indexmember |
|
|
606 | ? this->begin () + obj->*indexmember - 1 |
|
|
607 | : this->end (); |
|
|
608 | } |
|
|
609 | |
|
|
610 | void push_back (T *obj) |
|
|
611 | { |
|
|
612 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
|
|
613 | obj->*indexmember = this->size (); |
|
|
614 | } |
|
|
615 | |
279 | void insert (T *obj) |
616 | void insert (T *obj) |
280 | { |
617 | { |
281 | assert (!(obj->*index)); |
|
|
282 | push_back (obj); |
618 | push_back (obj); |
283 | obj->*index = this->size (); |
|
|
284 | } |
619 | } |
285 | |
620 | |
286 | void insert (T &obj) |
621 | void insert (T &obj) |
287 | { |
622 | { |
288 | insert (&obj); |
623 | insert (&obj); |
289 | } |
624 | } |
290 | |
625 | |
291 | void erase (T *obj) |
626 | void erase (T *obj) |
292 | { |
627 | { |
293 | assert (obj->*index); |
|
|
294 | int pos = obj->*index; |
628 | unsigned int pos = obj->*indexmember; |
295 | obj->*index = 0; |
629 | obj->*indexmember = 0; |
296 | |
630 | |
297 | if (pos < this->size ()) |
631 | if (pos < this->size ()) |
298 | { |
632 | { |
299 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
633 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
300 | (*this)[pos - 1]->*index = pos; |
634 | (*this)[pos - 1]->*indexmember = pos; |
301 | } |
635 | } |
302 | |
636 | |
303 | this->pop_back (); |
637 | this->pop_back (); |
304 | } |
638 | } |
305 | |
639 | |
306 | void erase (T &obj) |
640 | void erase (T &obj) |
307 | { |
641 | { |
308 | errase (&obj); |
642 | erase (&obj); |
309 | } |
643 | } |
310 | }; |
644 | }; |
311 | |
|
|
312 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
|
|
313 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
|
|
314 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
|
|
315 | |
|
|
316 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
|
|
317 | |
645 | |
318 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
646 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
|
|
647 | // returns the number of bytes actually used (including \0) |
319 | void assign (char *dst, const char *src, int maxlen); |
648 | int assign (char *dst, const char *src, int maxsize); |
320 | |
649 | |
321 | // type-safe version of assign |
650 | // type-safe version of assign |
322 | template<int N> |
651 | template<int N> |
323 | inline void assign (char (&dst)[N], const char *src) |
652 | inline int assign (char (&dst)[N], const char *src) |
324 | { |
653 | { |
325 | assign ((char *)&dst, src, N); |
654 | return assign ((char *)&dst, src, N); |
326 | } |
655 | } |
327 | |
656 | |
328 | typedef double tstamp; |
657 | typedef double tstamp; |
329 | |
658 | |
330 | // return current time as timestampe |
659 | // return current time as timestamp |
331 | tstamp now (); |
660 | tstamp now (); |
332 | |
661 | |
333 | int similar_direction (int a, int b); |
662 | int similar_direction (int a, int b); |
334 | |
663 | |
|
|
664 | // like v?sprintf, but returns a "static" buffer |
|
|
665 | char *vformat (const char *format, va_list ap); |
|
|
666 | char *format (const char *format, ...) attribute ((format (printf, 1, 2))); |
|
|
667 | |
|
|
668 | // safety-check player input which will become object->msg |
|
|
669 | bool msg_is_safe (const char *msg); |
|
|
670 | |
|
|
671 | ///////////////////////////////////////////////////////////////////////////// |
|
|
672 | // threads, very very thin wrappers around pthreads |
|
|
673 | |
|
|
674 | struct thread |
|
|
675 | { |
|
|
676 | pthread_t id; |
|
|
677 | |
|
|
678 | void start (void *(*start_routine)(void *), void *arg = 0); |
|
|
679 | |
|
|
680 | void cancel () |
|
|
681 | { |
|
|
682 | pthread_cancel (id); |
|
|
683 | } |
|
|
684 | |
|
|
685 | void *join () |
|
|
686 | { |
|
|
687 | void *ret; |
|
|
688 | |
|
|
689 | if (pthread_join (id, &ret)) |
|
|
690 | cleanup ("pthread_join failed", 1); |
|
|
691 | |
|
|
692 | return ret; |
|
|
693 | } |
|
|
694 | }; |
|
|
695 | |
|
|
696 | // note that mutexes are not classes |
|
|
697 | typedef pthread_mutex_t smutex; |
|
|
698 | |
|
|
699 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
700 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
|
|
701 | #else |
|
|
702 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
335 | #endif |
703 | #endif |
336 | |
704 | |
|
|
705 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
706 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
707 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
|
|
708 | |
|
|
709 | typedef pthread_cond_t scond; |
|
|
710 | |
|
|
711 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
|
|
712 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
|
|
713 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
|
|
714 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
|
|
715 | |
|
|
716 | #endif |
|
|
717 | |