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 | |
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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> 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 | |
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; } |
94 | |
106 | |
95 | 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)); } |
96 | 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)); } |
97 | |
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 | |
98 | template<typename T> |
117 | template<typename T> |
99 | static inline T |
118 | static inline T |
100 | 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) |
101 | { |
120 | { |
102 | 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); |
103 | } |
138 | } |
104 | |
139 | |
105 | // lots of stuff taken from FXT |
140 | // lots of stuff taken from FXT |
106 | |
141 | |
107 | /* 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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185 | absdir (int d) |
220 | absdir (int d) |
186 | { |
221 | { |
187 | return ((d - 1) & 7) + 1; |
222 | return ((d - 1) & 7) + 1; |
188 | } |
223 | } |
189 | |
224 | |
190 | extern size_t slice_alloc; // statistics |
225 | extern ssize_t slice_alloc; // statistics |
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226 | |
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227 | void *salloc_ (int n) throw (std::bad_alloc); |
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228 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
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229 | |
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230 | // strictly the same as g_slice_alloc, but never returns 0 |
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231 | template<typename T> |
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232 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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233 | |
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234 | // also copies src into the new area, like "memdup" |
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235 | // if src is 0, clears the memory |
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236 | template<typename T> |
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237 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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238 | |
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239 | // clears the memory |
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240 | template<typename T> |
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241 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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242 | |
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243 | // for symmetry |
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244 | template<typename T> |
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245 | inline void sfree (T *ptr, int n = 1) throw () |
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246 | { |
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247 | if (expect_true (ptr)) |
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248 | { |
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249 | slice_alloc -= n * sizeof (T); |
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250 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
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251 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
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252 | assert (slice_alloc >= 0);//D |
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253 | } |
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254 | } |
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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 | } |
191 | |
263 | |
192 | // makes dynamically allocated objects zero-initialised |
264 | // makes dynamically allocated objects zero-initialised |
193 | struct zero_initialised |
265 | struct zero_initialised |
194 | { |
266 | { |
195 | void *operator new (size_t s, void *p) |
267 | void *operator new (size_t s, void *p) |
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198 | return p; |
270 | return p; |
199 | } |
271 | } |
200 | |
272 | |
201 | void *operator new (size_t s) |
273 | void *operator new (size_t s) |
202 | { |
274 | { |
203 | slice_alloc += s; |
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204 | return g_slice_alloc0 (s); |
275 | return salloc0<char> (s); |
205 | } |
276 | } |
206 | |
277 | |
207 | void *operator new[] (size_t s) |
278 | void *operator new[] (size_t s) |
208 | { |
279 | { |
209 | slice_alloc += s; |
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210 | return g_slice_alloc0 (s); |
280 | return salloc0<char> (s); |
211 | } |
281 | } |
212 | |
282 | |
213 | void operator delete (void *p, size_t s) |
283 | void operator delete (void *p, size_t s) |
214 | { |
284 | { |
215 | slice_alloc -= s; |
285 | sfree ((char *)p, s); |
216 | g_slice_free1 (s, p); |
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217 | } |
286 | } |
218 | |
287 | |
219 | void operator delete[] (void *p, size_t s) |
288 | void operator delete[] (void *p, size_t s) |
220 | { |
289 | { |
221 | slice_alloc -= s; |
290 | sfree ((char *)p, s); |
222 | g_slice_free1 (s, p); |
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223 | } |
291 | } |
224 | }; |
292 | }; |
225 | |
293 | |
226 | void *salloc_ (int n) throw (std::bad_alloc); |
294 | // makes dynamically allocated objects zero-initialised |
227 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
295 | struct slice_allocated |
228 | |
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229 | // strictly the same as g_slice_alloc, but never returns 0 |
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230 | template<typename T> |
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231 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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232 | |
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233 | // also copies src into the new area, like "memdup" |
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234 | // if src is 0, clears the memory |
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235 | template<typename T> |
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236 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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237 | |
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238 | // clears the memory |
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239 | template<typename T> |
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240 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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241 | |
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242 | // for symmetry |
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243 | template<typename T> |
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244 | inline void sfree (T *ptr, int n = 1) throw () |
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245 | { |
296 | { |
246 | #ifdef PREFER_MALLOC |
297 | void *operator new (size_t s, void *p) |
247 | free (ptr); |
298 | { |
248 | #else |
299 | return p; |
249 | slice_alloc -= n * sizeof (T); |
300 | } |
250 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
301 | |
251 | #endif |
302 | void *operator new (size_t s) |
252 | } |
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); |
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310 | } |
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311 | |
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312 | void operator delete (void *p, size_t s) |
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313 | { |
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314 | sfree ((char *)p, s); |
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315 | } |
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316 | |
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317 | void operator delete[] (void *p, size_t s) |
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318 | { |
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319 | sfree ((char *)p, s); |
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320 | } |
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321 | }; |
253 | |
322 | |
254 | // a STL-compatible allocator that uses g_slice |
323 | // a STL-compatible allocator that uses g_slice |
255 | // boy, this is verbose |
324 | // boy, this is verbose |
256 | template<typename Tp> |
325 | template<typename Tp> |
257 | struct slice_allocator |
326 | struct slice_allocator |
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323 | } |
392 | } |
324 | |
393 | |
325 | void seed (uint32_t seed); |
394 | void seed (uint32_t seed); |
326 | uint32_t next (); |
395 | uint32_t next (); |
327 | |
396 | |
328 | // uniform distribution |
397 | // uniform distribution, 0 .. max (0, num - 1) |
329 | uint32_t operator ()(uint32_t num) |
398 | uint32_t operator ()(uint32_t num) |
330 | { |
399 | { |
331 | return is_constant (num) |
400 | return is_constant (num) |
332 | ? (next () * (uint64_t)num) >> 32U |
401 | ? (next () * (uint64_t)num) >> 32U |
333 | : get_range (num); |
402 | : get_range (num); |
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351 | int get_range (int r_min, int r_max); |
420 | int get_range (int r_min, int r_max); |
352 | }; |
421 | }; |
353 | |
422 | |
354 | typedef tausworthe_random_generator rand_gen; |
423 | typedef tausworthe_random_generator rand_gen; |
355 | |
424 | |
356 | extern rand_gen rndm; |
425 | extern rand_gen rndm, rmg_rndm; |
357 | |
426 | |
358 | INTERFACE_CLASS (attachable) |
427 | INTERFACE_CLASS (attachable) |
359 | struct refcnt_base |
428 | struct refcnt_base |
360 | { |
429 | { |
361 | typedef int refcnt_t; |
430 | typedef int refcnt_t; |
… | |
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568 | int similar_direction (int a, int b); |
637 | int similar_direction (int a, int b); |
569 | |
638 | |
570 | // like sprintf, but returns a "static" buffer |
639 | // like sprintf, but returns a "static" buffer |
571 | const char *format (const char *format, ...); |
640 | const char *format (const char *format, ...); |
572 | |
641 | |
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642 | ///////////////////////////////////////////////////////////////////////////// |
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643 | // threads, very very thin wrappers around pthreads |
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644 | |
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645 | struct thread |
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646 | { |
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647 | pthread_t id; |
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648 | |
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649 | void start (void *(*start_routine)(void *), void *arg = 0); |
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650 | |
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651 | void cancel () |
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652 | { |
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653 | pthread_cancel (id); |
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654 | } |
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655 | |
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656 | void *join () |
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657 | { |
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658 | void *ret; |
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659 | |
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660 | if (pthread_join (id, &ret)) |
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661 | cleanup ("pthread_join failed", 1); |
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662 | |
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663 | return ret; |
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664 | } |
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665 | }; |
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666 | |
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667 | // note that mutexes are not classes |
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668 | typedef pthread_mutex_t smutex; |
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669 | |
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670 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
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671 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
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672 | #else |
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673 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
573 | #endif |
674 | #endif |
574 | |
675 | |
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676 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
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677 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
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678 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
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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 | |
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687 | #endif |
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688 | |