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Comparing deliantra/server/include/util.h (file contents):
Revision 1.119 by root, Thu Jan 26 19:01:22 2012 UTC vs.
Revision 1.130 by root, Wed Dec 5 19:03:27 2018 UTC

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 (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
4 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team 5 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * 6 *
6 * Deliantra is free software: you can redistribute it and/or modify it under 7 * Deliantra is free software: you can redistribute it and/or modify it under
7 * the terms of the Affero GNU General Public License as published by the 8 * the terms of the Affero GNU General Public License as published by the
8 * Free Software Foundation, either version 3 of the License, or (at your 9 * Free Software Foundation, either version 3 of the License, or (at your
9 * option) any later version. 10 * option) any later version.
10 * 11 *
11 * This program is distributed in the hope that it will be useful, 12 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details. 15 * GNU General Public License for more details.
15 * 16 *
16 * You should have received a copy of the Affero GNU General Public License 17 * You should have received a copy of the Affero GNU General Public License
17 * and the GNU General Public License along with this program. If not, see 18 * and the GNU General Public License along with this program. If not, see
18 * <http://www.gnu.org/licenses/>. 19 * <http://www.gnu.org/licenses/>.
19 * 20 *
20 * The authors can be reached via e-mail to <support@deliantra.net> 21 * The authors can be reached via e-mail to <support@deliantra.net>
21 */ 22 */
22 23
23#ifndef UTIL_H__ 24#ifndef UTIL_H__
24#define UTIL_H__ 25#define UTIL_H__
… …
35#include <cmath> 36#include <cmath>
36#include <new> 37#include <new>
37#include <vector> 38#include <vector>
38 39
39#include <glib.h> 40#include <glib.h>
41
42#include <flat_hash_map.hpp>
40 43
41#include <shstr.h> 44#include <shstr.h>
42#include <traits.h> 45#include <traits.h>
43 46
44#if DEBUG_SALLOC 47#if DEBUG_SALLOC
… …
52# define g_slice_alloc0(s) calloc (1, (s)) 55# define g_slice_alloc0(s) calloc (1, (s))
53# define g_slice_alloc(s) malloc ((s)) 56# define g_slice_alloc(s) malloc ((s))
54# define g_slice_free1(s,p) free ((p)) 57# define g_slice_free1(s,p) free ((p))
55#endif 58#endif
56 59
57// use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever)
58#define auto(var,expr) decltype(expr) var = (expr)
59
60#if cplusplus_does_not_suck
61// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)
62template<typename T, int N>
63static inline int array_length (const T (&arr)[N])
64{
65 return N;
66}
67#else
68#define array_length(name) (sizeof (name) / sizeof (name [0]))
69#endif
70
71// very ugly macro that basically declares and initialises a variable 60// very ugly macro that basically declares and initialises a variable
72// that is in scope for the next statement only 61// that is in scope for the next statement only
73// works only for stuff that can be assigned 0 and converts to false 62// works only for stuff that can be assigned 0 and converts to false
74// (note: works great for pointers) 63// (note: works great for pointers)
75// most ugly macro I ever wrote 64// most ugly macro I ever wrote
… …
81 70
82// in range excluding end 71// in range excluding end
83#define IN_RANGE_EXC(val,beg,end) \ 72#define IN_RANGE_EXC(val,beg,end) \
84 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 73 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
85 74
86void cleanup (const char *cause, bool make_core = false); 75ecb_cold void cleanup (const char *cause, bool make_core = false);
87void fork_abort (const char *msg); 76ecb_cold void fork_abort (const char *msg);
88 77
89// rationale for using (U) not (T) is to reduce signed/unsigned issues, 78// rationale for using (U) not (T) is to reduce signed/unsigned issues,
90// as a is often a constant while b is the variable. it is still a bug, though. 79// as a is often a constant while b is the variable. it is still a bug, though.
91template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 80template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
92template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 81template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
… …
122 111
123// div* only work correctly for div > 0 112// div* only work correctly for div > 0
124// div, with correct rounding (< 0.5 downwards, >=0.5 upwards) 113// div, with correct rounding (< 0.5 downwards, >=0.5 upwards)
125template<typename T> static inline T div (T val, T div) 114template<typename T> static inline T div (T val, T div)
126{ 115{
127 return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; 116 return ecb_expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div;
128} 117}
129 118
130template<> inline float div (float val, float div) { return val / div; } 119template<> inline float div (float val, float div) { return val / div; }
131template<> inline double div (double val, double div) { return val / div; } 120template<> inline double div (double val, double div) { return val / div; }
132 121
133// div, round-up 122// div, round-up
134template<typename T> static inline T div_ru (T val, T div) 123template<typename T> static inline T div_ru (T val, T div)
135{ 124{
136 return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; 125 return ecb_expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div;
137} 126}
138// div, round-down 127// div, round-down
139template<typename T> static inline T div_rd (T val, T div) 128template<typename T> static inline T div_rd (T val, T div)
140{ 129{
141 return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div; 130 return ecb_expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div;
142} 131}
143 132
144// lerp* only work correctly for min_in < max_in 133// lerp* only work correctly for min_in < max_in
145// Linear intERPolate, scales val from min_in..max_in to min_out..max_out 134// Linear intERPolate, scales val from min_in..max_in to min_out..max_out
146template<typename T> 135template<typename T>
… …
237#if 0 226#if 0
238// and has a max. error of 6 in the range -100..+100. 227// and has a max. error of 6 in the range -100..+100.
239#else 228#else
240// and has a max. error of 9 in the range -100..+100. 229// and has a max. error of 9 in the range -100..+100.
241#endif 230#endif
242inline int 231inline int
243idistance (int dx, int dy) 232idistance (int dx, int dy)
244{ 233{
245 unsigned int dx_ = abs (dx); 234 unsigned int dx_ = abs (dx);
246 unsigned int dy_ = abs (dy); 235 unsigned int dy_ = abs (dy);
247 236
248#if 0 237#if 0
249 return dx_ > dy_ 238 return dx_ > dy_
… …
283absdir (int d) 272absdir (int d)
284{ 273{
285 return ((d - 1) & 7) + 1; 274 return ((d - 1) & 7) + 1;
286} 275}
287 276
288// avoid ctz name because netbsd or freebsd spams it's namespace with it
289#if GCC_VERSION(3,4)
290static inline int least_significant_bit (uint32_t x)
291{
292 return __builtin_ctz (x);
293}
294#else
295int least_significant_bit (uint32_t x);
296#endif
297
298#define for_all_bits_sparse_32(mask, idxvar) \ 277#define for_all_bits_sparse_32(mask, idxvar) \
299 for (uint32_t idxvar, mask_ = mask; \ 278 for (uint32_t idxvar, mask_ = mask; \
300 mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);) 279 mask_ && ((idxvar = ecb_ctz32 (mask_)), mask_ &= ~(1 << idxvar), 1);)
301 280
302extern ssize_t slice_alloc; // statistics 281extern ssize_t slice_alloc; // statistics
303 282
304void *salloc_ (int n) throw (std::bad_alloc); 283void *salloc_ (int n);
305void *salloc_ (int n, void *src) throw (std::bad_alloc); 284void *salloc_ (int n, void *src);
306 285
307// strictly the same as g_slice_alloc, but never returns 0 286// strictly the same as g_slice_alloc, but never returns 0
308template<typename T> 287template<typename T>
309inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } 288inline T *salloc (int n = 1) { return (T *)salloc_ (n * sizeof (T)); }
310 289
311// also copies src into the new area, like "memdup" 290// also copies src into the new area, like "memdup"
312// if src is 0, clears the memory 291// if src is 0, clears the memory
313template<typename T> 292template<typename T>
314inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } 293inline T *salloc (int n, T *src) { return (T *)salloc_ (n * sizeof (T), (void *)src); }
315 294
316// clears the memory 295// clears the memory
317template<typename T> 296template<typename T>
318inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } 297inline T *salloc0(int n = 1) { return (T *)salloc_ (n * sizeof (T), 0); }
319 298
320// for symmetry 299// for symmetry
321template<typename T> 300template<typename T>
322inline void sfree (T *ptr, int n = 1) throw () 301inline void sfree (T *ptr, int n = 1) noexcept
323{ 302{
324 if (expect_true (ptr)) 303 if (ecb_expect_true (ptr))
325 { 304 {
326 slice_alloc -= n * sizeof (T); 305 slice_alloc -= n * sizeof (T);
327 if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); 306 if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T));
328 g_slice_free1 (n * sizeof (T), (void *)ptr); 307 g_slice_free1 (n * sizeof (T), (void *)ptr);
329 } 308 }
330} 309}
331 310
332// nulls the pointer 311// nulls the pointer
333template<typename T> 312template<typename T>
334inline void sfree0 (T *&ptr, int n = 1) throw () 313inline void sfree0 (T *&ptr, int n = 1) noexcept
335{ 314{
336 sfree<T> (ptr, n); 315 sfree<T> (ptr, n);
337 ptr = 0; 316 ptr = 0;
338} 317}
339 318
… …
407 typedef const Tp *const_pointer; 386 typedef const Tp *const_pointer;
408 typedef Tp &reference; 387 typedef Tp &reference;
409 typedef const Tp &const_reference; 388 typedef const Tp &const_reference;
410 typedef Tp value_type; 389 typedef Tp value_type;
411 390
412 template <class U> 391 template <class U>
413 struct rebind 392 struct rebind
414 { 393 {
415 typedef slice_allocator<U> other; 394 typedef slice_allocator<U> other;
416 }; 395 };
417 396
418 slice_allocator () throw () { } 397 slice_allocator () noexcept { }
419 slice_allocator (const slice_allocator &) throw () { } 398 slice_allocator (const slice_allocator &) noexcept { }
420 template<typename Tp2> 399 template<typename Tp2>
421 slice_allocator (const slice_allocator<Tp2> &) throw () { } 400 slice_allocator (const slice_allocator<Tp2> &) noexcept { }
422 401
423 ~slice_allocator () { } 402 ~slice_allocator () { }
424 403
425 pointer address (reference x) const { return &x; } 404 pointer address (reference x) const { return &x; }
426 const_pointer address (const_reference x) const { return &x; } 405 const_pointer address (const_reference x) const { return &x; }
… …
433 void deallocate (pointer p, size_type n) 412 void deallocate (pointer p, size_type n)
434 { 413 {
435 sfree<Tp> (p, n); 414 sfree<Tp> (p, n);
436 } 415 }
437 416
438 size_type max_size () const throw () 417 size_type max_size () const noexcept
439 { 418 {
440 return size_t (-1) / sizeof (Tp); 419 return size_t (-1) / sizeof (Tp);
441 } 420 }
442 421
443 void construct (pointer p, const Tp &val) 422 void construct (pointer p, const Tp &val)
… …
460 refcnt_buf (void *data, size_t size); 439 refcnt_buf (void *data, size_t size);
461 440
462 refcnt_buf (const refcnt_buf &src) 441 refcnt_buf (const refcnt_buf &src)
463 { 442 {
464 data = src.data; 443 data = src.data;
465 ++_refcnt (); 444 inc ();
466 } 445 }
467 446
468 ~refcnt_buf (); 447 ~refcnt_buf ();
469 448
470 refcnt_buf &operator =(const refcnt_buf &src); 449 refcnt_buf &operator =(const refcnt_buf &src);
… …
479 return _size (); 458 return _size ();
480 } 459 }
481 460
482protected: 461protected:
483 enum { 462 enum {
484 overhead = sizeof (unsigned int) * 2 463 overhead = sizeof (uint32_t) * 2
485 }; 464 };
486 465
487 unsigned int &_size () const 466 uint32_t &_size () const
488 { 467 {
489 return ((unsigned int *)data)[-2]; 468 return ((unsigned int *)data)[-2];
490 } 469 }
491 470
492 unsigned int &_refcnt () const 471 uint32_t &_refcnt () const
493 { 472 {
494 return ((unsigned int *)data)[-1]; 473 return ((unsigned int *)data)[-1];
495 } 474 }
496 475
497 void _alloc (unsigned int size) 476 void _alloc (uint32_t size)
498 { 477 {
499 data = ((char *)salloc<char> (size + overhead)) + overhead; 478 data = ((char *)salloc<char> (size + overhead)) + overhead;
500 _size () = size; 479 _size () = size;
501 _refcnt () = 1; 480 _refcnt () = 1;
502 } 481 }
503 482
483 void _dealloc ();
484
485 void inc ()
486 {
487 ++_refcnt ();
488 }
489
504 void dec () 490 void dec ()
505 { 491 {
506 if (!--_refcnt ()) 492 if (!--_refcnt ())
507 sfree<char> (data - overhead, size () + overhead); 493 _dealloc ();
508 } 494 }
509}; 495};
510 496
511INTERFACE_CLASS (attachable) 497INTERFACE_CLASS (attachable)
512struct refcnt_base 498struct refcnt_base
… …
529 // p if not null 515 // p if not null
530 refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } 516 refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; }
531 517
532 void refcnt_dec () 518 void refcnt_dec ()
533 { 519 {
534 if (!is_constant (p)) 520 if (!ecb_is_constant (p))
535 --*refcnt_ref (); 521 --*refcnt_ref ();
536 else if (p) 522 else if (p)
537 --p->refcnt; 523 --p->refcnt;
538 } 524 }
539 525
540 void refcnt_inc () 526 void refcnt_inc ()
541 { 527 {
542 if (!is_constant (p)) 528 if (!ecb_is_constant (p))
543 ++*refcnt_ref (); 529 ++*refcnt_ref ();
544 else if (p) 530 else if (p)
545 ++p->refcnt; 531 ++p->refcnt;
546 } 532 }
547 533
… …
590 // with good distribution. 576 // with good distribution.
591 // FNV-1a is faster on many cpus because the multiplication 577 // FNV-1a is faster on many cpus because the multiplication
592 // runs concurrently with the looping logic. 578 // runs concurrently with the looping logic.
593 // we modify the hash a bit to improve its distribution 579 // we modify the hash a bit to improve its distribution
594 uint32_t hash = STRHSH_NULL; 580 uint32_t hash = STRHSH_NULL;
595 581
596 while (*s) 582 while (*s)
597 hash = (hash ^ *s++) * 16777619U; 583 hash = (hash ^ *s++) * 16777619U;
598 584
599 return hash ^ (hash >> 16); 585 return hash ^ (hash >> 16);
600} 586}
601 587
602static inline uint32_t 588static inline uint32_t
603memhsh (const char *s, size_t len) 589memhsh (const char *s, size_t len)
604{ 590{
605 uint32_t hash = STRHSH_NULL; 591 uint32_t hash = STRHSH_NULL;
606 592
607 while (len--) 593 while (len--)
608 hash = (hash ^ *s++) * 16777619U; 594 hash = (hash ^ *s++) * 16777619U;
609 595
610 return hash; 596 return hash;
611} 597}
… …
619 605
620 std::size_t operator ()(const shstr &s) const 606 std::size_t operator ()(const shstr &s) const
621 { 607 {
622 return strhsh (s); 608 return strhsh (s);
623 } 609 }
610
611 typedef ska::power_of_two_hash_policy hash_policy;
624}; 612};
625 613
626struct str_equal 614struct str_equal
627{ 615{
628 bool operator ()(const char *a, const char *b) const 616 bool operator ()(const char *a, const char *b) const
… …
807 795
808int similar_direction (int a, int b); 796int similar_direction (int a, int b);
809 797
810// like v?sprintf, but returns a "static" buffer 798// like v?sprintf, but returns a "static" buffer
811char *vformat (const char *format, va_list ap); 799char *vformat (const char *format, va_list ap);
812char *format (const char *format, ...) attribute ((format (printf, 1, 2))); 800char *format (const char *format, ...) ecb_attribute ((format (printf, 1, 2)));
813 801
814// safety-check player input which will become object->msg 802// safety-check player input which will become object->msg
815bool msg_is_safe (const char *msg); 803bool msg_is_safe (const char *msg);
816 804
817///////////////////////////////////////////////////////////////////////////// 805/////////////////////////////////////////////////////////////////////////////

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