1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Crossfire TRT 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. |
10 | * |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
11 | * This program is distributed in the hope that it will be useful, |
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14 | * GNU General Public License for more details. |
14 | * GNU General Public License for more details. |
15 | * |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
18 | * |
18 | * |
19 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
19 | * The authors can be reached via e-mail to <support@deliantra.net> |
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 |
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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 |
26 | |
28 | |
27 | #if __GNUC__ >= 3 |
29 | #if __GNUC__ >= 3 |
28 | # define is_constant(c) __builtin_constant_p (c) |
30 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
31 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | # 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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42 | // is mostly true or mosty false. note that these return |
44 | // is mostly true or mosty false. note that these return |
43 | // booleans, not the expression. |
45 | // booleans, not the expression. |
44 | #define expect_false(expr) expect ((expr) != 0, 0) |
46 | #define expect_false(expr) expect ((expr) != 0, 0) |
45 | #define expect_true(expr) expect ((expr) != 0, 1) |
47 | #define expect_true(expr) expect ((expr) != 0, 1) |
46 | |
48 | |
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49 | #include <pthread.h> |
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50 | |
47 | #include <cstddef> |
51 | #include <cstddef> |
48 | #include <cmath> |
52 | #include <cmath> |
49 | #include <new> |
53 | #include <new> |
50 | #include <vector> |
54 | #include <vector> |
51 | |
55 | |
52 | #include <glib.h> |
56 | #include <glib.h> |
53 | |
57 | |
54 | #include <shstr.h> |
58 | #include <shstr.h> |
55 | #include <traits.h> |
59 | #include <traits.h> |
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60 | |
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61 | #if DEBUG_SALLOC |
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62 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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63 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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64 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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65 | void *g_slice_alloc (unsigned long size); |
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66 | void *g_slice_alloc0 (unsigned long size); |
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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)) |
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72 | #endif |
56 | |
73 | |
57 | // 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) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | |
76 | |
60 | // very ugly macro that basicaly declares and initialises a variable |
77 | // very ugly macro that basicaly declares and initialises a variable |
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70 | |
87 | |
71 | // in range excluding end |
88 | // in range excluding end |
72 | #define IN_RANGE_EXC(val,beg,end) \ |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
73 | ((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)) |
74 | |
91 | |
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92 | void cleanup (const char *cause, bool make_core = false); |
75 | void fork_abort (const char *msg); |
93 | void fork_abort (const char *msg); |
76 | |
94 | |
77 | // 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, |
78 | // 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. |
79 | 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; } |
80 | 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; } |
81 | 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; } |
82 | |
100 | |
83 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
101 | 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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102 | |
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103 | 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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104 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
84 | |
105 | |
85 | template<typename T> |
106 | template<typename T> |
86 | static inline T |
107 | static inline T |
87 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
108 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
88 | { |
109 | { |
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172 | absdir (int d) |
193 | absdir (int d) |
173 | { |
194 | { |
174 | return ((d - 1) & 7) + 1; |
195 | return ((d - 1) & 7) + 1; |
175 | } |
196 | } |
176 | |
197 | |
177 | // makes dynamically allocated objects zero-initialised |
198 | extern ssize_t slice_alloc; // statistics |
178 | struct zero_initialised |
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179 | { |
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180 | void *operator new (size_t s, void *p) |
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181 | { |
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182 | memset (p, 0, s); |
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183 | return p; |
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184 | } |
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185 | |
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186 | void *operator new (size_t s) |
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187 | { |
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188 | return g_slice_alloc0 (s); |
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189 | } |
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190 | |
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191 | void *operator new[] (size_t s) |
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192 | { |
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193 | return g_slice_alloc0 (s); |
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194 | } |
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195 | |
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196 | void operator delete (void *p, size_t s) |
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197 | { |
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198 | g_slice_free1 (s, p); |
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199 | } |
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200 | |
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201 | void operator delete[] (void *p, size_t s) |
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202 | { |
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203 | g_slice_free1 (s, p); |
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204 | } |
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205 | }; |
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206 | |
199 | |
207 | void *salloc_ (int n) throw (std::bad_alloc); |
200 | void *salloc_ (int n) throw (std::bad_alloc); |
208 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
201 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
209 | |
202 | |
210 | // strictly the same as g_slice_alloc, but never returns 0 |
203 | // strictly the same as g_slice_alloc, but never returns 0 |
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222 | |
215 | |
223 | // for symmetry |
216 | // for symmetry |
224 | template<typename T> |
217 | template<typename T> |
225 | inline void sfree (T *ptr, int n = 1) throw () |
218 | inline void sfree (T *ptr, int n = 1) throw () |
226 | { |
219 | { |
227 | #ifdef PREFER_MALLOC |
220 | if (expect_true (ptr)) |
228 | free (ptr); |
221 | { |
229 | #else |
222 | slice_alloc -= n * sizeof (T); |
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223 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
230 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
224 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
231 | #endif |
225 | assert (slice_alloc >= 0);//D |
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226 | } |
232 | } |
227 | } |
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228 | |
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229 | // makes dynamically allocated objects zero-initialised |
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230 | struct zero_initialised |
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231 | { |
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232 | void *operator new (size_t s, void *p) |
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233 | { |
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234 | memset (p, 0, s); |
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235 | return p; |
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236 | } |
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237 | |
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238 | void *operator new (size_t s) |
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239 | { |
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240 | return salloc0<char> (s); |
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241 | } |
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242 | |
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243 | void *operator new[] (size_t s) |
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244 | { |
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245 | return salloc0<char> (s); |
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246 | } |
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247 | |
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248 | void operator delete (void *p, size_t s) |
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249 | { |
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250 | sfree ((char *)p, s); |
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251 | } |
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252 | |
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253 | void operator delete[] (void *p, size_t s) |
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254 | { |
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255 | sfree ((char *)p, s); |
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256 | } |
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257 | }; |
233 | |
258 | |
234 | // a STL-compatible allocator that uses g_slice |
259 | // a STL-compatible allocator that uses g_slice |
235 | // boy, this is verbose |
260 | // boy, this is verbose |
236 | template<typename Tp> |
261 | template<typename Tp> |
237 | struct slice_allocator |
262 | struct slice_allocator |
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249 | { |
274 | { |
250 | typedef slice_allocator<U> other; |
275 | typedef slice_allocator<U> other; |
251 | }; |
276 | }; |
252 | |
277 | |
253 | slice_allocator () throw () { } |
278 | slice_allocator () throw () { } |
254 | slice_allocator (const slice_allocator &o) throw () { } |
279 | slice_allocator (const slice_allocator &) throw () { } |
255 | template<typename Tp2> |
280 | template<typename Tp2> |
256 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
281 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
257 | |
282 | |
258 | ~slice_allocator () { } |
283 | ~slice_allocator () { } |
259 | |
284 | |
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268 | void deallocate (pointer p, size_type n) |
293 | void deallocate (pointer p, size_type n) |
269 | { |
294 | { |
270 | sfree<Tp> (p, n); |
295 | sfree<Tp> (p, n); |
271 | } |
296 | } |
272 | |
297 | |
273 | size_type max_size ()const throw () |
298 | size_type max_size () const throw () |
274 | { |
299 | { |
275 | return size_t (-1) / sizeof (Tp); |
300 | return size_t (-1) / sizeof (Tp); |
276 | } |
301 | } |
277 | |
302 | |
278 | void construct (pointer p, const Tp &val) |
303 | void construct (pointer p, const Tp &val) |
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345 | MTH void refcnt_dec () const { --refcnt; } |
370 | MTH void refcnt_dec () const { --refcnt; } |
346 | |
371 | |
347 | refcnt_base () : refcnt (0) { } |
372 | refcnt_base () : refcnt (0) { } |
348 | }; |
373 | }; |
349 | |
374 | |
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375 | // to avoid branches with more advanced compilers |
350 | extern refcnt_base::refcnt_t refcnt_dummy; |
376 | extern refcnt_base::refcnt_t refcnt_dummy; |
351 | |
377 | |
352 | template<class T> |
378 | template<class T> |
353 | struct refptr |
379 | struct refptr |
354 | { |
380 | { |
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539 | assign ((char *)&dst, src, N); |
565 | assign ((char *)&dst, src, N); |
540 | } |
566 | } |
541 | |
567 | |
542 | typedef double tstamp; |
568 | typedef double tstamp; |
543 | |
569 | |
544 | // return current time as timestampe |
570 | // return current time as timestamp |
545 | tstamp now (); |
571 | tstamp now (); |
546 | |
572 | |
547 | int similar_direction (int a, int b); |
573 | int similar_direction (int a, int b); |
548 | |
574 | |
549 | // like printf, but returns a std::string |
575 | // like sprintf, but returns a "static" buffer |
550 | const std::string format (const char *format, ...); |
576 | const char *format (const char *format, ...); |
551 | |
577 | |
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578 | ///////////////////////////////////////////////////////////////////////////// |
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579 | // threads, very very thin wrappers around pthreads |
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580 | |
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581 | struct thread |
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582 | { |
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583 | pthread_t id; |
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584 | |
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585 | void start (void *(*start_routine)(void *), void *arg = 0); |
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586 | |
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587 | void cancel () |
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588 | { |
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589 | pthread_cancel (id); |
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590 | } |
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591 | |
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592 | void *join () |
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593 | { |
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594 | void *ret; |
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595 | |
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596 | if (pthread_join (id, &ret)) |
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597 | cleanup ("pthread_join failed", 1); |
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598 | |
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599 | return ret; |
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600 | } |
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601 | }; |
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602 | |
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603 | // note that mutexes are not classes |
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604 | typedef pthread_mutex_t smutex; |
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605 | |
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606 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
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607 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
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608 | #else |
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609 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
552 | #endif |
610 | #endif |
553 | |
611 | |
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612 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
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613 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
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614 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
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615 | |
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616 | typedef pthread_cond_t scond; |
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617 | |
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618 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
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619 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
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620 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
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621 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
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622 | |
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623 | #endif |
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624 | |