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20 | */ |
20 | */ |
21 | |
21 | |
22 | #ifndef UTIL_H__ |
22 | #ifndef UTIL_H__ |
23 | #define UTIL_H__ |
23 | #define UTIL_H__ |
24 | |
24 | |
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25 | #define DEBUG_SALLOC 0 |
25 | //#define PREFER_MALLOC |
26 | #define PREFER_MALLOC 0 |
26 | //#define DEBUG_SALLOC |
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27 | |
27 | |
28 | #if __GNUC__ >= 3 |
28 | #if __GNUC__ >= 3 |
29 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define is_constant(c) __builtin_constant_p (c) |
30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
31 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
31 | # 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 |
43 | // is mostly true or mosty false. note that these return |
44 | // booleans, not the expression. |
44 | // booleans, not the expression. |
45 | #define expect_false(expr) expect ((expr) != 0, 0) |
45 | #define expect_false(expr) expect ((expr) != 0, 0) |
46 | #define expect_true(expr) expect ((expr) != 0, 1) |
46 | #define expect_true(expr) expect ((expr) != 0, 1) |
47 | |
47 | |
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48 | #include <pthread.h> |
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49 | |
48 | #include <cstddef> |
50 | #include <cstddef> |
49 | #include <cmath> |
51 | #include <cmath> |
50 | #include <new> |
52 | #include <new> |
51 | #include <vector> |
53 | #include <vector> |
52 | |
54 | |
53 | #include <glib.h> |
55 | #include <glib.h> |
54 | |
56 | |
55 | #include <shstr.h> |
57 | #include <shstr.h> |
56 | #include <traits.h> |
58 | #include <traits.h> |
57 | |
59 | |
58 | #ifdef DEBUG_SALLOC |
60 | #if DEBUG_SALLOC |
59 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
61 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
60 | # define g_slice_alloc(s) debug_slice_alloc(s) |
62 | # define g_slice_alloc(s) debug_slice_alloc(s) |
61 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
63 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
62 | void *g_slice_alloc (unsigned long size); |
64 | void *g_slice_alloc (unsigned long size); |
63 | void *g_slice_alloc0 (unsigned long size); |
65 | void *g_slice_alloc0 (unsigned long size); |
64 | void g_slice_free1 (unsigned long size, void *ptr); |
66 | void g_slice_free1 (unsigned long size, void *ptr); |
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67 | #elif PREFER_MALLOC |
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68 | # define g_slice_alloc0(s) calloc (1, (s)) |
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69 | # define g_slice_alloc(s) malloc ((s)) |
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70 | # define g_slice_free1(s,p) free ((p)) |
65 | #endif |
71 | #endif |
66 | |
72 | |
67 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
73 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
68 | #define auto(var,expr) decltype(expr) var = (expr) |
74 | #define auto(var,expr) decltype(expr) var = (expr) |
69 | |
75 | |
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80 | |
86 | |
81 | // in range excluding end |
87 | // in range excluding end |
82 | #define IN_RANGE_EXC(val,beg,end) \ |
88 | #define IN_RANGE_EXC(val,beg,end) \ |
83 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
89 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
84 | |
90 | |
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91 | void cleanup (const char *cause, bool make_core = false); |
85 | void fork_abort (const char *msg); |
92 | void fork_abort (const char *msg); |
86 | |
93 | |
87 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
94 | // 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. |
95 | // 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; } |
96 | 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; } |
97 | 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; } |
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; } |
92 | |
99 | |
93 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
100 | 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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101 | |
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102 | 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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103 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
94 | |
104 | |
95 | template<typename T> |
105 | template<typename T> |
96 | static inline T |
106 | static inline T |
97 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
107 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
98 | { |
108 | { |
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182 | absdir (int d) |
192 | absdir (int d) |
183 | { |
193 | { |
184 | return ((d - 1) & 7) + 1; |
194 | return ((d - 1) & 7) + 1; |
185 | } |
195 | } |
186 | |
196 | |
187 | extern size_t slice_alloc; // statistics |
197 | extern ssize_t slice_alloc; // statistics |
188 | |
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189 | // makes dynamically allocated objects zero-initialised |
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190 | struct zero_initialised |
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191 | { |
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192 | void *operator new (size_t s, void *p) |
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193 | { |
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194 | memset (p, 0, s); |
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195 | return p; |
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196 | } |
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197 | |
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198 | void *operator new (size_t s) |
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199 | { |
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200 | slice_alloc += s; |
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201 | return g_slice_alloc0 (s); |
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202 | } |
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203 | |
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204 | void *operator new[] (size_t s) |
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205 | { |
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206 | slice_alloc += s; |
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207 | return g_slice_alloc0 (s); |
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208 | } |
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209 | |
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210 | void operator delete (void *p, size_t s) |
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211 | { |
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212 | slice_alloc -= s; |
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213 | g_slice_free1 (s, p); |
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214 | } |
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215 | |
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216 | void operator delete[] (void *p, size_t s) |
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217 | { |
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218 | slice_alloc -= s; |
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219 | g_slice_free1 (s, p); |
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220 | } |
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221 | }; |
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222 | |
198 | |
223 | void *salloc_ (int n) throw (std::bad_alloc); |
199 | void *salloc_ (int n) throw (std::bad_alloc); |
224 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
200 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
225 | |
201 | |
226 | // strictly the same as g_slice_alloc, but never returns 0 |
202 | // strictly the same as g_slice_alloc, but never returns 0 |
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238 | |
214 | |
239 | // for symmetry |
215 | // for symmetry |
240 | template<typename T> |
216 | template<typename T> |
241 | inline void sfree (T *ptr, int n = 1) throw () |
217 | inline void sfree (T *ptr, int n = 1) throw () |
242 | { |
218 | { |
243 | #ifdef PREFER_MALLOC |
219 | if (expect_true (ptr)) |
244 | free (ptr); |
220 | { |
245 | #else |
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246 | slice_alloc -= n * sizeof (T); |
221 | slice_alloc -= n * sizeof (T); |
247 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
222 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
248 | #endif |
223 | assert (slice_alloc >= 0);//D |
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224 | } |
249 | } |
225 | } |
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226 | |
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227 | // makes dynamically allocated objects zero-initialised |
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228 | struct zero_initialised |
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229 | { |
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230 | void *operator new (size_t s, void *p) |
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231 | { |
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232 | memset (p, 0, s); |
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233 | return p; |
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234 | } |
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235 | |
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236 | void *operator new (size_t s) |
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237 | { |
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238 | return salloc0<char> (s); |
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239 | } |
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240 | |
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241 | void *operator new[] (size_t s) |
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242 | { |
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243 | return salloc0<char> (s); |
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244 | } |
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245 | |
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246 | void operator delete (void *p, size_t s) |
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247 | { |
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248 | sfree ((char *)p, s); |
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249 | } |
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250 | |
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251 | void operator delete[] (void *p, size_t s) |
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252 | { |
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253 | sfree ((char *)p, s); |
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254 | } |
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255 | }; |
250 | |
256 | |
251 | // a STL-compatible allocator that uses g_slice |
257 | // a STL-compatible allocator that uses g_slice |
252 | // boy, this is verbose |
258 | // boy, this is verbose |
253 | template<typename Tp> |
259 | template<typename Tp> |
254 | struct slice_allocator |
260 | struct slice_allocator |
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266 | { |
272 | { |
267 | typedef slice_allocator<U> other; |
273 | typedef slice_allocator<U> other; |
268 | }; |
274 | }; |
269 | |
275 | |
270 | slice_allocator () throw () { } |
276 | slice_allocator () throw () { } |
271 | slice_allocator (const slice_allocator &o) throw () { } |
277 | slice_allocator (const slice_allocator &) throw () { } |
272 | template<typename Tp2> |
278 | template<typename Tp2> |
273 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
279 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
274 | |
280 | |
275 | ~slice_allocator () { } |
281 | ~slice_allocator () { } |
276 | |
282 | |
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285 | void deallocate (pointer p, size_type n) |
291 | void deallocate (pointer p, size_type n) |
286 | { |
292 | { |
287 | sfree<Tp> (p, n); |
293 | sfree<Tp> (p, n); |
288 | } |
294 | } |
289 | |
295 | |
290 | size_type max_size ()const throw () |
296 | size_type max_size () const throw () |
291 | { |
297 | { |
292 | return size_t (-1) / sizeof (Tp); |
298 | return size_t (-1) / sizeof (Tp); |
293 | } |
299 | } |
294 | |
300 | |
295 | void construct (pointer p, const Tp &val) |
301 | void construct (pointer p, const Tp &val) |
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565 | int similar_direction (int a, int b); |
571 | int similar_direction (int a, int b); |
566 | |
572 | |
567 | // like sprintf, but returns a "static" buffer |
573 | // like sprintf, but returns a "static" buffer |
568 | const char *format (const char *format, ...); |
574 | const char *format (const char *format, ...); |
569 | |
575 | |
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576 | ///////////////////////////////////////////////////////////////////////////// |
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577 | // threads, very very thin wrappers around pthreads |
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578 | |
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579 | struct thread |
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580 | { |
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581 | pthread_t id; |
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582 | |
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583 | void start (void *(*start_routine)(void *), void *arg = 0); |
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584 | |
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585 | void cancel () |
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586 | { |
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587 | pthread_cancel (id); |
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588 | } |
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589 | |
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590 | void *join () |
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591 | { |
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592 | void *ret; |
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593 | |
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594 | if (pthread_join (id, &ret)) |
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595 | cleanup ("pthread_join failed", 1); |
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596 | |
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597 | return ret; |
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598 | } |
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599 | }; |
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600 | |
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601 | // note that mutexes are not classes |
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602 | typedef pthread_mutex_t smutex; |
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603 | |
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604 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
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605 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
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606 | #else |
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607 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
570 | #endif |
608 | #endif |
571 | |
609 | |
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610 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
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611 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
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612 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
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613 | |
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614 | typedef pthread_cond_t scond; |
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615 | |
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616 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
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617 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
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618 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
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619 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
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620 | |
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621 | #endif |
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622 | |