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 PREFER_MALLOC |
25 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
26 | #define DEBUG_SALLOC |
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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… | |
43 | // is mostly true or mosty false. note that these return |
44 | // is mostly true or mosty false. note that these return |
44 | // booleans, not the expression. |
45 | // booleans, not the expression. |
45 | #define expect_false(expr) expect ((expr) != 0, 0) |
46 | #define expect_false(expr) expect ((expr) != 0, 0) |
46 | #define expect_true(expr) expect ((expr) != 0, 1) |
47 | #define expect_true(expr) expect ((expr) != 0, 1) |
47 | |
48 | |
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49 | #include <pthread.h> |
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50 | |
48 | #include <cstddef> |
51 | #include <cstddef> |
49 | #include <cmath> |
52 | #include <cmath> |
50 | #include <new> |
53 | #include <new> |
51 | #include <vector> |
54 | #include <vector> |
52 | |
55 | |
53 | #include <glib.h> |
56 | #include <glib.h> |
54 | |
57 | |
55 | #include <shstr.h> |
58 | #include <shstr.h> |
56 | #include <traits.h> |
59 | #include <traits.h> |
57 | |
60 | |
58 | #ifdef DEBUG_SALLOC |
61 | #if DEBUG_SALLOC |
59 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
62 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
60 | # define g_slice_alloc(s) debug_slice_alloc(s) |
63 | # define g_slice_alloc(s) debug_slice_alloc(s) |
61 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
64 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
62 | void *g_slice_alloc (unsigned long size); |
65 | void *g_slice_alloc (unsigned long size); |
63 | void *g_slice_alloc0 (unsigned long size); |
66 | void *g_slice_alloc0 (unsigned long size); |
64 | void g_slice_free1 (unsigned long size, void *ptr); |
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)) |
65 | #endif |
72 | #endif |
66 | |
73 | |
67 | // 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) |
68 | #define auto(var,expr) decltype(expr) var = (expr) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
69 | |
76 | |
70 | // very ugly macro that basicaly declares and initialises a variable |
77 | // very ugly macro that basically declares and initialises a variable |
71 | // that is in scope for the next statement only |
78 | // that is in scope for the next statement only |
72 | // works only for stuff that can be assigned 0 and converts to false |
79 | // works only for stuff that can be assigned 0 and converts to false |
73 | // (note: works great for pointers) |
80 | // (note: works great for pointers) |
74 | // most ugly macro I ever wrote |
81 | // most ugly macro I ever wrote |
75 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
82 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
… | |
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80 | |
87 | |
81 | // in range excluding end |
88 | // in range excluding end |
82 | #define IN_RANGE_EXC(val,beg,end) \ |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
83 | ((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)) |
84 | |
91 | |
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92 | void cleanup (const char *cause, bool make_core = false); |
85 | void fork_abort (const char *msg); |
93 | void fork_abort (const char *msg); |
86 | |
94 | |
87 | // 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, |
88 | // 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. |
89 | 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; } |
90 | 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; } |
91 | 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; } |
92 | |
100 | |
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101 | template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); } |
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102 | template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
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103 | 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); } |
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104 | |
93 | 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; } |
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106 | |
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107 | 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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108 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
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109 | |
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110 | // sign returns -1 or +1 |
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111 | template<typename T> |
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112 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
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113 | // relies on 2c representation |
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114 | template<> |
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115 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
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116 | |
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117 | // sign0 returns -1, 0 or +1 |
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118 | template<typename T> |
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119 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
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120 | |
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121 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
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122 | template<typename T> static inline T div (T val, T div) { return (val + div / 2) / div; } |
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123 | // div, round-up |
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124 | template<typename T> static inline T div_ru (T val, T div) { return (val + div - 1) / div; } |
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125 | // div, round-down |
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126 | template<typename T> static inline T div_rd (T val, T div) { return (val ) / div; } |
94 | |
127 | |
95 | template<typename T> |
128 | template<typename T> |
96 | static inline T |
129 | static inline T |
97 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
130 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
98 | { |
131 | { |
99 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
132 | return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
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133 | } |
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134 | |
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135 | // lerp, round-down |
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136 | template<typename T> |
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137 | static inline T |
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138 | lerp_rd (T val, T min_in, T max_in, T min_out, T max_out) |
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139 | { |
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140 | return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
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141 | } |
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142 | |
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143 | // lerp, round-up |
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144 | template<typename T> |
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145 | static inline T |
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146 | lerp_ru (T val, T min_in, T max_in, T min_out, T max_out) |
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147 | { |
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148 | return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
100 | } |
149 | } |
101 | |
150 | |
102 | // lots of stuff taken from FXT |
151 | // lots of stuff taken from FXT |
103 | |
152 | |
104 | /* Rotate right. This is used in various places for checksumming */ |
153 | /* Rotate right. This is used in various places for checksumming */ |
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182 | absdir (int d) |
231 | absdir (int d) |
183 | { |
232 | { |
184 | return ((d - 1) & 7) + 1; |
233 | return ((d - 1) & 7) + 1; |
185 | } |
234 | } |
186 | |
235 | |
187 | extern size_t slice_alloc; // statistics |
236 | extern ssize_t slice_alloc; // statistics |
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237 | |
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238 | void *salloc_ (int n) throw (std::bad_alloc); |
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239 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
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240 | |
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241 | // strictly the same as g_slice_alloc, but never returns 0 |
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242 | template<typename T> |
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243 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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244 | |
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245 | // also copies src into the new area, like "memdup" |
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246 | // if src is 0, clears the memory |
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247 | template<typename T> |
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248 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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249 | |
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250 | // clears the memory |
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251 | template<typename T> |
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252 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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253 | |
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254 | // for symmetry |
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255 | template<typename T> |
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256 | inline void sfree (T *ptr, int n = 1) throw () |
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257 | { |
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258 | if (expect_true (ptr)) |
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259 | { |
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260 | slice_alloc -= n * sizeof (T); |
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261 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
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262 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
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263 | assert (slice_alloc >= 0);//D |
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264 | } |
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265 | } |
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266 | |
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267 | // nulls the pointer |
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268 | template<typename T> |
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269 | inline void sfree0 (T *&ptr, int n = 1) throw () |
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270 | { |
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271 | sfree<T> (ptr, n); |
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272 | ptr = 0; |
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273 | } |
188 | |
274 | |
189 | // makes dynamically allocated objects zero-initialised |
275 | // makes dynamically allocated objects zero-initialised |
190 | struct zero_initialised |
276 | struct zero_initialised |
191 | { |
277 | { |
192 | void *operator new (size_t s, void *p) |
278 | void *operator new (size_t s, void *p) |
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195 | return p; |
281 | return p; |
196 | } |
282 | } |
197 | |
283 | |
198 | void *operator new (size_t s) |
284 | void *operator new (size_t s) |
199 | { |
285 | { |
200 | slice_alloc += s; |
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201 | return g_slice_alloc0 (s); |
286 | return salloc0<char> (s); |
202 | } |
287 | } |
203 | |
288 | |
204 | void *operator new[] (size_t s) |
289 | void *operator new[] (size_t s) |
205 | { |
290 | { |
206 | slice_alloc += s; |
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207 | return g_slice_alloc0 (s); |
291 | return salloc0<char> (s); |
208 | } |
292 | } |
209 | |
293 | |
210 | void operator delete (void *p, size_t s) |
294 | void operator delete (void *p, size_t s) |
211 | { |
295 | { |
212 | slice_alloc -= s; |
296 | sfree ((char *)p, s); |
213 | g_slice_free1 (s, p); |
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214 | } |
297 | } |
215 | |
298 | |
216 | void operator delete[] (void *p, size_t s) |
299 | void operator delete[] (void *p, size_t s) |
217 | { |
300 | { |
218 | slice_alloc -= s; |
301 | sfree ((char *)p, s); |
219 | g_slice_free1 (s, p); |
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220 | } |
302 | } |
221 | }; |
303 | }; |
222 | |
304 | |
223 | void *salloc_ (int n) throw (std::bad_alloc); |
305 | // makes dynamically allocated objects zero-initialised |
224 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
306 | struct slice_allocated |
225 | |
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226 | // strictly the same as g_slice_alloc, but never returns 0 |
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227 | template<typename T> |
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228 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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229 | |
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230 | // also copies src into the new area, like "memdup" |
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231 | // if src is 0, clears the memory |
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232 | template<typename T> |
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233 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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234 | |
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235 | // clears the memory |
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236 | template<typename T> |
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237 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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238 | |
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239 | // for symmetry |
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240 | template<typename T> |
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241 | inline void sfree (T *ptr, int n = 1) throw () |
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242 | { |
307 | { |
243 | #ifdef PREFER_MALLOC |
308 | void *operator new (size_t s, void *p) |
244 | free (ptr); |
309 | { |
245 | #else |
310 | return p; |
246 | slice_alloc -= n * sizeof (T); |
311 | } |
247 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
312 | |
248 | #endif |
313 | void *operator new (size_t s) |
249 | } |
314 | { |
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315 | return salloc<char> (s); |
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316 | } |
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317 | |
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318 | void *operator new[] (size_t s) |
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319 | { |
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320 | return salloc<char> (s); |
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321 | } |
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322 | |
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323 | void operator delete (void *p, size_t s) |
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324 | { |
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325 | sfree ((char *)p, s); |
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326 | } |
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327 | |
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328 | void operator delete[] (void *p, size_t s) |
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329 | { |
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330 | sfree ((char *)p, s); |
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331 | } |
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332 | }; |
250 | |
333 | |
251 | // a STL-compatible allocator that uses g_slice |
334 | // a STL-compatible allocator that uses g_slice |
252 | // boy, this is verbose |
335 | // boy, this is verbose |
253 | template<typename Tp> |
336 | template<typename Tp> |
254 | struct slice_allocator |
337 | struct slice_allocator |
… | |
… | |
266 | { |
349 | { |
267 | typedef slice_allocator<U> other; |
350 | typedef slice_allocator<U> other; |
268 | }; |
351 | }; |
269 | |
352 | |
270 | slice_allocator () throw () { } |
353 | slice_allocator () throw () { } |
271 | slice_allocator (const slice_allocator &o) throw () { } |
354 | slice_allocator (const slice_allocator &) throw () { } |
272 | template<typename Tp2> |
355 | template<typename Tp2> |
273 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
356 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
274 | |
357 | |
275 | ~slice_allocator () { } |
358 | ~slice_allocator () { } |
276 | |
359 | |
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285 | void deallocate (pointer p, size_type n) |
368 | void deallocate (pointer p, size_type n) |
286 | { |
369 | { |
287 | sfree<Tp> (p, n); |
370 | sfree<Tp> (p, n); |
288 | } |
371 | } |
289 | |
372 | |
290 | size_type max_size ()const throw () |
373 | size_type max_size () const throw () |
291 | { |
374 | { |
292 | return size_t (-1) / sizeof (Tp); |
375 | return size_t (-1) / sizeof (Tp); |
293 | } |
376 | } |
294 | |
377 | |
295 | void construct (pointer p, const Tp &val) |
378 | void construct (pointer p, const Tp &val) |
… | |
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306 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
389 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
307 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
390 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
308 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
391 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
309 | struct tausworthe_random_generator |
392 | struct tausworthe_random_generator |
310 | { |
393 | { |
311 | // generator |
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312 | uint32_t state [4]; |
394 | uint32_t state [4]; |
313 | |
395 | |
314 | void operator =(const tausworthe_random_generator &src) |
396 | void operator =(const tausworthe_random_generator &src) |
315 | { |
397 | { |
316 | state [0] = src.state [0]; |
398 | state [0] = src.state [0]; |
… | |
… | |
319 | state [3] = src.state [3]; |
401 | state [3] = src.state [3]; |
320 | } |
402 | } |
321 | |
403 | |
322 | void seed (uint32_t seed); |
404 | void seed (uint32_t seed); |
323 | uint32_t next (); |
405 | uint32_t next (); |
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406 | }; |
324 | |
407 | |
325 | // uniform distribution |
408 | // Xorshift RNGs, George Marsaglia |
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409 | // http://www.jstatsoft.org/v08/i14/paper |
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410 | // this one is about 40% faster than the tausworthe one above (i.e. not much), |
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411 | // despite the inlining, and has the issue of only creating 2**32-1 numbers. |
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412 | struct xorshift_random_generator |
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413 | { |
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414 | uint32_t x, y; |
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415 | |
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416 | void operator =(const xorshift_random_generator &src) |
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417 | { |
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418 | x = src.x; |
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419 | y = src.y; |
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420 | } |
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421 | |
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422 | void seed (uint32_t seed) |
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423 | { |
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424 | x = seed; |
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425 | y = seed * 69069U; |
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426 | } |
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427 | |
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428 | uint32_t next () |
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429 | { |
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430 | uint32_t t = x ^ (x << 10); |
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431 | x = y; |
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432 | y = y ^ (y >> 13) ^ t ^ (t >> 10); |
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433 | return y; |
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434 | } |
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435 | }; |
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436 | |
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437 | template<class generator> |
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438 | struct random_number_generator : generator |
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439 | { |
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440 | // uniform distribution, 0 .. max (0, num - 1) |
326 | uint32_t operator ()(uint32_t num) |
441 | uint32_t operator ()(uint32_t num) |
327 | { |
442 | { |
328 | return is_constant (num) |
443 | return !is_constant (num) ? get_range (num) // non-constant |
329 | ? (next () * (uint64_t)num) >> 32U |
444 | : num & (num - 1) ? (this->next () * (uint64_t)num) >> 32U // constant, non-power-of-two |
330 | : get_range (num); |
445 | : this->next () & (num - 1); // constant, power-of-two |
331 | } |
446 | } |
332 | |
447 | |
333 | // return a number within (min .. max) |
448 | // return a number within (min .. max) |
334 | int operator () (int r_min, int r_max) |
449 | int operator () (int r_min, int r_max) |
335 | { |
450 | { |
… | |
… | |
346 | protected: |
461 | protected: |
347 | uint32_t get_range (uint32_t r_max); |
462 | uint32_t get_range (uint32_t r_max); |
348 | int get_range (int r_min, int r_max); |
463 | int get_range (int r_min, int r_max); |
349 | }; |
464 | }; |
350 | |
465 | |
351 | typedef tausworthe_random_generator rand_gen; |
466 | typedef random_number_generator<tausworthe_random_generator> rand_gen; |
352 | |
467 | |
353 | extern rand_gen rndm; |
468 | extern rand_gen rndm, rmg_rndm; |
354 | |
469 | |
355 | INTERFACE_CLASS (attachable) |
470 | INTERFACE_CLASS (attachable) |
356 | struct refcnt_base |
471 | struct refcnt_base |
357 | { |
472 | { |
358 | typedef int refcnt_t; |
473 | typedef int refcnt_t; |
… | |
… | |
565 | int similar_direction (int a, int b); |
680 | int similar_direction (int a, int b); |
566 | |
681 | |
567 | // like sprintf, but returns a "static" buffer |
682 | // like sprintf, but returns a "static" buffer |
568 | const char *format (const char *format, ...); |
683 | const char *format (const char *format, ...); |
569 | |
684 | |
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|
685 | ///////////////////////////////////////////////////////////////////////////// |
|
|
686 | // threads, very very thin wrappers around pthreads |
|
|
687 | |
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688 | struct thread |
|
|
689 | { |
|
|
690 | pthread_t id; |
|
|
691 | |
|
|
692 | void start (void *(*start_routine)(void *), void *arg = 0); |
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|
693 | |
|
|
694 | void cancel () |
|
|
695 | { |
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|
696 | pthread_cancel (id); |
|
|
697 | } |
|
|
698 | |
|
|
699 | void *join () |
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700 | { |
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701 | void *ret; |
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|
702 | |
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|
703 | if (pthread_join (id, &ret)) |
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704 | cleanup ("pthread_join failed", 1); |
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705 | |
|
|
706 | return ret; |
|
|
707 | } |
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708 | }; |
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709 | |
|
|
710 | // note that mutexes are not classes |
|
|
711 | typedef pthread_mutex_t smutex; |
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712 | |
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|
713 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
714 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
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|
715 | #else |
|
|
716 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
570 | #endif |
717 | #endif |
571 | |
718 | |
|
|
719 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
720 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
721 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
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|
722 | |
|
|
723 | typedef pthread_cond_t scond; |
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|
724 | |
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|
725 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
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|
726 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
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|
727 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
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|
728 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
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729 | |
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|
730 | #endif |
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|
731 | |