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 (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Deliantra 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. |
… | |
… | |
20 | */ |
20 | */ |
21 | |
21 | |
22 | #ifndef UTIL_H__ |
22 | #ifndef UTIL_H__ |
23 | #define UTIL_H__ |
23 | #define UTIL_H__ |
24 | |
24 | |
25 | #define DEBUG_SALLOC 0 |
25 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
26 | #define PREFER_MALLOC 0 |
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) |
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65 | void *g_slice_alloc0 (unsigned long size); |
66 | void *g_slice_alloc0 (unsigned long size); |
66 | void g_slice_free1 (unsigned long size, void *ptr); |
67 | void g_slice_free1 (unsigned long size, void *ptr); |
67 | #elif PREFER_MALLOC |
68 | #elif PREFER_MALLOC |
68 | # define g_slice_alloc0(s) calloc (1, (s)) |
69 | # define g_slice_alloc0(s) calloc (1, (s)) |
69 | # define g_slice_alloc(s) malloc ((s)) |
70 | # define g_slice_alloc(s) malloc ((s)) |
70 | # define g_slice_free1(s,p) free ((s)) |
71 | # define g_slice_free1(s,p) free ((p)) |
71 | #endif |
72 | #endif |
72 | |
73 | |
73 | // 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) |
74 | #define auto(var,expr) decltype(expr) var = (expr) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
75 | |
76 | |
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95 | // 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. |
96 | 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; } |
97 | 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; } |
98 | 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; } |
99 | |
100 | |
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101 | template<typename T> static inline void min_it (T &v, T m) { v = min (v, m); } |
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102 | template<typename T> static inline void max_it (T &v, T m) { v = max (v, m); } |
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103 | template<typename T> static inline void clamp_it (T &v, T a, T b) { v = clamp (v, a, b); } |
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104 | |
100 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
105 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
101 | |
106 | |
102 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
107 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
103 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
108 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
104 | |
109 | |
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110 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
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111 | template<typename T> static inline T div (T val, T div) { return (val + div / 2) / div; } |
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112 | // div, round-up |
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113 | template<typename T> static inline T div_ru (T val, T div) { return (val + div - 1) / div; } |
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114 | // div, round-down |
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115 | template<typename T> static inline T div_rd (T val, T div) { return (val ) / div; } |
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116 | |
105 | template<typename T> |
117 | template<typename T> |
106 | static inline T |
118 | static inline T |
107 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
119 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
108 | { |
120 | { |
109 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
121 | return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
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122 | } |
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123 | |
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124 | // lerp, round-down |
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125 | template<typename T> |
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126 | static inline T |
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127 | lerp_rd (T val, T min_in, T max_in, T min_out, T max_out) |
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128 | { |
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129 | return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
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130 | } |
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131 | |
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132 | // lerp, round-up |
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133 | template<typename T> |
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134 | static inline T |
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135 | lerp_ru (T val, T min_in, T max_in, T min_out, T max_out) |
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136 | { |
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137 | return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
110 | } |
138 | } |
111 | |
139 | |
112 | // lots of stuff taken from FXT |
140 | // lots of stuff taken from FXT |
113 | |
141 | |
114 | /* Rotate right. This is used in various places for checksumming */ |
142 | /* Rotate right. This is used in various places for checksumming */ |
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217 | inline void sfree (T *ptr, int n = 1) throw () |
245 | inline void sfree (T *ptr, int n = 1) throw () |
218 | { |
246 | { |
219 | if (expect_true (ptr)) |
247 | if (expect_true (ptr)) |
220 | { |
248 | { |
221 | slice_alloc -= n * sizeof (T); |
249 | slice_alloc -= n * sizeof (T); |
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250 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
222 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
251 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
223 | assert (slice_alloc >= 0);//D |
252 | assert (slice_alloc >= 0);//D |
224 | } |
253 | } |
225 | } |
254 | } |
226 | |
255 | |
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256 | // nulls the pointer |
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257 | template<typename T> |
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258 | inline void sfree0 (T *&ptr, int n = 1) throw () |
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259 | { |
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260 | sfree<T> (ptr, n); |
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261 | ptr = 0; |
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262 | } |
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263 | |
227 | // makes dynamically allocated objects zero-initialised |
264 | // makes dynamically allocated objects zero-initialised |
228 | struct zero_initialised |
265 | struct zero_initialised |
229 | { |
266 | { |
230 | void *operator new (size_t s, void *p) |
267 | void *operator new (size_t s, void *p) |
231 | { |
268 | { |
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239 | } |
276 | } |
240 | |
277 | |
241 | void *operator new[] (size_t s) |
278 | void *operator new[] (size_t s) |
242 | { |
279 | { |
243 | return salloc0<char> (s); |
280 | return salloc0<char> (s); |
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281 | } |
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282 | |
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283 | void operator delete (void *p, size_t s) |
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284 | { |
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285 | sfree ((char *)p, s); |
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286 | } |
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287 | |
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288 | void operator delete[] (void *p, size_t s) |
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289 | { |
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290 | sfree ((char *)p, s); |
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291 | } |
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292 | }; |
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293 | |
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294 | // makes dynamically allocated objects zero-initialised |
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295 | struct slice_allocated |
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296 | { |
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297 | void *operator new (size_t s, void *p) |
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298 | { |
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299 | return p; |
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300 | } |
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301 | |
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302 | void *operator new (size_t s) |
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303 | { |
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304 | return salloc<char> (s); |
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305 | } |
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306 | |
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307 | void *operator new[] (size_t s) |
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308 | { |
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309 | return salloc<char> (s); |
244 | } |
310 | } |
245 | |
311 | |
246 | void operator delete (void *p, size_t s) |
312 | void operator delete (void *p, size_t s) |
247 | { |
313 | { |
248 | sfree ((char *)p, s); |
314 | sfree ((char *)p, s); |
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326 | } |
392 | } |
327 | |
393 | |
328 | void seed (uint32_t seed); |
394 | void seed (uint32_t seed); |
329 | uint32_t next (); |
395 | uint32_t next (); |
330 | |
396 | |
331 | // uniform distribution |
397 | // uniform distribution, 0 .. max (0, num - 1) |
332 | uint32_t operator ()(uint32_t num) |
398 | uint32_t operator ()(uint32_t num) |
333 | { |
399 | { |
334 | return is_constant (num) |
400 | return is_constant (num) |
335 | ? (next () * (uint64_t)num) >> 32U |
401 | ? (next () * (uint64_t)num) >> 32U |
336 | : get_range (num); |
402 | : get_range (num); |
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354 | int get_range (int r_min, int r_max); |
420 | int get_range (int r_min, int r_max); |
355 | }; |
421 | }; |
356 | |
422 | |
357 | typedef tausworthe_random_generator rand_gen; |
423 | typedef tausworthe_random_generator rand_gen; |
358 | |
424 | |
359 | extern rand_gen rndm; |
425 | extern rand_gen rndm, rmg_rndm; |
360 | |
426 | |
361 | INTERFACE_CLASS (attachable) |
427 | INTERFACE_CLASS (attachable) |
362 | struct refcnt_base |
428 | struct refcnt_base |
363 | { |
429 | { |
364 | typedef int refcnt_t; |
430 | typedef int refcnt_t; |
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606 | #else |
672 | #else |
607 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
673 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
608 | #endif |
674 | #endif |
609 | |
675 | |
610 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
676 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
611 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
677 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
612 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
678 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
613 | |
679 | |
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680 | typedef pthread_cond_t scond; |
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681 | |
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682 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
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683 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
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684 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
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685 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
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686 | |
614 | #endif |
687 | #endif |
615 | |
688 | |