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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 | |
27 | |
27 | #if __GNUC__ >= 3 |
28 | #if __GNUC__ >= 3 |
28 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | # 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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42 | // is mostly true or mosty false. note that these return |
43 | // is mostly true or mosty false. note that these return |
43 | // booleans, not the expression. |
44 | // booleans, not the expression. |
44 | #define expect_false(expr) expect ((expr) != 0, 0) |
45 | #define expect_false(expr) expect ((expr) != 0, 0) |
45 | #define expect_true(expr) expect ((expr) != 0, 1) |
46 | #define expect_true(expr) expect ((expr) != 0, 1) |
46 | |
47 | |
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48 | #include <pthread.h> |
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49 | |
47 | #include <cstddef> |
50 | #include <cstddef> |
48 | #include <cmath> |
51 | #include <cmath> |
49 | #include <new> |
52 | #include <new> |
50 | #include <vector> |
53 | #include <vector> |
51 | |
54 | |
52 | #include <glib.h> |
55 | #include <glib.h> |
53 | |
56 | |
54 | #include <shstr.h> |
57 | #include <shstr.h> |
55 | #include <traits.h> |
58 | #include <traits.h> |
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59 | |
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60 | #if DEBUG_SALLOC |
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61 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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62 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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63 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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64 | void *g_slice_alloc (unsigned long size); |
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65 | void *g_slice_alloc0 (unsigned long size); |
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66 | void g_slice_free1 (unsigned long size, void *ptr); |
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67 | #endif |
56 | |
68 | |
57 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
69 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
70 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | |
71 | |
60 | // very ugly macro that basicaly declares and initialises a variable |
72 | // very ugly macro that basicaly declares and initialises a variable |
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70 | |
82 | |
71 | // in range excluding end |
83 | // in range excluding end |
72 | #define IN_RANGE_EXC(val,beg,end) \ |
84 | #define IN_RANGE_EXC(val,beg,end) \ |
73 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
85 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
74 | |
86 | |
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87 | void cleanup (const char *cause, bool make_core = false); |
75 | void fork_abort (const char *msg); |
88 | void fork_abort (const char *msg); |
76 | |
89 | |
77 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
90 | // 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. |
91 | // 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; } |
92 | 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; } |
93 | 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; } |
94 | 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 | |
95 | |
83 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
96 | 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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97 | |
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98 | 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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99 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
84 | |
100 | |
85 | template<typename T> |
101 | template<typename T> |
86 | static inline T |
102 | static inline T |
87 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
103 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
88 | { |
104 | { |
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228 | |
244 | |
229 | // for symmetry |
245 | // for symmetry |
230 | template<typename T> |
246 | template<typename T> |
231 | inline void sfree (T *ptr, int n = 1) throw () |
247 | inline void sfree (T *ptr, int n = 1) throw () |
232 | { |
248 | { |
233 | #ifdef PREFER_MALLOC |
249 | #if PREFER_MALLOC |
234 | free (ptr); |
250 | free (ptr); |
235 | #else |
251 | #else |
236 | slice_alloc -= n * sizeof (T); |
252 | slice_alloc -= n * sizeof (T); |
237 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
253 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
238 | #endif |
254 | #endif |
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256 | { |
272 | { |
257 | typedef slice_allocator<U> other; |
273 | typedef slice_allocator<U> other; |
258 | }; |
274 | }; |
259 | |
275 | |
260 | slice_allocator () throw () { } |
276 | slice_allocator () throw () { } |
261 | slice_allocator (const slice_allocator &o) throw () { } |
277 | slice_allocator (const slice_allocator &) throw () { } |
262 | template<typename Tp2> |
278 | template<typename Tp2> |
263 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
279 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
264 | |
280 | |
265 | ~slice_allocator () { } |
281 | ~slice_allocator () { } |
266 | |
282 | |
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275 | void deallocate (pointer p, size_type n) |
291 | void deallocate (pointer p, size_type n) |
276 | { |
292 | { |
277 | sfree<Tp> (p, n); |
293 | sfree<Tp> (p, n); |
278 | } |
294 | } |
279 | |
295 | |
280 | size_type max_size ()const throw () |
296 | size_type max_size () const throw () |
281 | { |
297 | { |
282 | return size_t (-1) / sizeof (Tp); |
298 | return size_t (-1) / sizeof (Tp); |
283 | } |
299 | } |
284 | |
300 | |
285 | void construct (pointer p, const Tp &val) |
301 | void construct (pointer p, const Tp &val) |
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555 | int similar_direction (int a, int b); |
571 | int similar_direction (int a, int b); |
556 | |
572 | |
557 | // like sprintf, but returns a "static" buffer |
573 | // like sprintf, but returns a "static" buffer |
558 | const char *format (const char *format, ...); |
574 | const char *format (const char *format, ...); |
559 | |
575 | |
560 | #endif |
576 | ///////////////////////////////////////////////////////////////////////////// |
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577 | // threads, very very thin wrappers around pthreads |
561 | |
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 |
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608 | #endif |
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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 | #endif |
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615 | |