[ViewVC] Diff of: cvs/deliantra/server/include/util.h

Comparing deliantra/server/include/util.h (file contents):
Revision 1.21 by root, Thu Dec 21 06:12:36 2006 UTC vs.
Revision 1.115 by root, Tue Apr 26 14:41:36 2011 UTC

…		…
		1	/*
		2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
		3	*
		4	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
		5	*
		6	* 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	* Free Software Foundation, either version 3 of the License, or (at your
		9	* option) any later version.
		10	*
		11	* This program is distributed in the hope that it will be useful,
		12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		14	* GNU General Public License for more details.
		15	*
		16	* 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	* <http://www.gnu.org/licenses/>.
		19	*
		20	* The authors can be reached via e-mail to <support@deliantra.net>
		21	*/
		22
1	#ifndef UTIL_H__	23	#ifndef UTIL_H__
2	#define UTIL_H__	24	#define UTIL_H__
3		25
4	#if __GNUC__ >= 3	26	#include <compiler.h>
5	# define is_constant(c) __builtin_constant_p (c)	27
		28	#define DEBUG_POISON 0x00 // poison memory before freeing it if != 0
		29	#define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs
		30	#define PREFER_MALLOC 0 // use malloc and not the slice allocator
		31
		32	#include <pthread.h>
		33
		34	#include <cstddef>
		35	#include <cmath>
		36	#include <new>
		37	#include <vector>
		38
		39	#include <glib.h>
		40
		41	#include <shstr.h>
		42	#include <traits.h>
		43
		44	#if DEBUG_SALLOC
		45	# define g_slice_alloc0(s) debug_slice_alloc0(s)
		46	# define g_slice_alloc(s) debug_slice_alloc(s)
		47	# define g_slice_free1(s,p) debug_slice_free1(s,p)
		48	void *g_slice_alloc (unsigned long size);
		49	void *g_slice_alloc0 (unsigned long size);
		50	void g_slice_free1 (unsigned long size, void *ptr);
		51	#elif PREFER_MALLOC
		52	# define g_slice_alloc0(s) calloc (1, (s))
		53	# define g_slice_alloc(s) malloc ((s))
		54	# define g_slice_free1(s,p) free ((p))
		55	#endif
		56
		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)
		62	template<typename T, int N>
		63	static inline int array_length (const T (&arr)[N])
		64	{
		65	return N;
		66	}
6	#else	67	#else
7	# define is_constant(c) 0	68	#define array_length(name) (sizeof (name) / sizeof (name [0]))
8	#endif	69	#endif
9		70
10	#include <cstddef>	71	// very ugly macro that basically declares and initialises a variable
		72	// that is in scope for the next statement only
		73	// works only for stuff that can be assigned 0 and converts to false
		74	// (note: works great for pointers)
		75	// most ugly macro I ever wrote
		76	#define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1)
11		77
12	#include <glib.h>	78	// in range including end
		79	#define IN_RANGE_INC(val,beg,end) \
		80	((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
13		81
14	// use a gcc extension for auto declarations until ISO C++ sanctifies them	82	// in range excluding end
15	#define AUTODECL(var,expr) typeof(expr) var = (expr)	83	#define IN_RANGE_EXC(val,beg,end) \
		84	((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
		85
		86	void cleanup (const char *cause, bool make_core = false);
		87	void fork_abort (const char *msg);
		88
		89	// 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.
		91	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 max (T a, U b) { return (U)a > b ? (U)a : b; }
		93	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
		95	template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); }
		96	template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); }
		97	template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = clamp (v, (T)a, (T)b); }
		98
		99	template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
		100
		101	template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); }
		102	template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); }
		103
		104	// sign returns -1 or +1
		105	template<typename T>
		106	static inline T sign (T v) { return v < 0 ? -1 : +1; }
		107	// relies on 2c representation
		108	template<>
		109	inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); }
		110	template<>
		111	inline sint16 sign (sint16 v) { return 1 - (sint16 (uint16 (v) >> 15) * 2); }
		112	template<>
		113	inline sint32 sign (sint32 v) { return 1 - (sint32 (uint32 (v) >> 31) * 2); }
		114
		115	// sign0 returns -1, 0 or +1
		116	template<typename T>
		117	static inline T sign0 (T v) { return v ? sign (v) : 0; }
		118
		119	//clashes with C++0x
		120	template<typename T, typename U>
		121	static inline T copysign (T a, U b) { return a > 0 ? b : -b; }
		122
		123	// div* only work correctly for div > 0
		124	// div, with correct rounding (< 0.5 downwards, >=0.5 upwards)
		125	template<typename T> static inline T div (T val, T div)
		126	{
		127	return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div;
		128	}
		129
		130	template<> inline float div (float val, float div) { return val / div; }
		131	template<> inline double div (double val, double div) { return val / div; }
		132
		133	// div, round-up
		134	template<typename T> static inline T div_ru (T val, T div)
		135	{
		136	return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div;
		137	}
		138	// div, round-down
		139	template<typename T> static inline T div_rd (T val, T div)
		140	{
		141	return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div;
		142	}
		143
		144	// lerp* only work correctly for min_in < max_in
		145	// Linear intERPolate, scales val from min_in..max_in to min_out..max_out
		146	template<typename T>
		147	static inline T
		148	lerp (T val, T min_in, T max_in, T min_out, T max_out)
		149	{
		150	return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in);
		151	}
		152
		153	// lerp, round-down
		154	template<typename T>
		155	static inline T
		156	lerp_rd (T val, T min_in, T max_in, T min_out, T max_out)
		157	{
		158	return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in);
		159	}
		160
		161	// lerp, round-up
		162	template<typename T>
		163	static inline T
		164	lerp_ru (T val, T min_in, T max_in, T min_out, T max_out)
		165	{
		166	return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in);
		167	}
		168
		169	// lots of stuff taken from FXT
		170
		171	/* Rotate right. This is used in various places for checksumming */
		172	//TODO: that sucks, use a better checksum algo
		173	static inline uint32_t
		174	rotate_right (uint32_t c, uint32_t count = 1)
		175	{
		176	return (c << (32 - count)) \| (c >> count);
		177	}
		178
		179	static inline uint32_t
		180	rotate_left (uint32_t c, uint32_t count = 1)
		181	{
		182	return (c >> (32 - count)) \| (c << count);
		183	}
		184
		185	// Return abs(a-b)
		186	// Both a and b must not have the most significant bit set
		187	static inline uint32_t
		188	upos_abs_diff (uint32_t a, uint32_t b)
		189	{
		190	long d1 = b - a;
		191	long d2 = (d1 & (d1 >> 31)) << 1;
		192
		193	return d1 - d2; // == (b - d) - (a + d);
		194	}
		195
		196	// Both a and b must not have the most significant bit set
		197	static inline uint32_t
		198	upos_min (uint32_t a, uint32_t b)
		199	{
		200	int32_t d = b - a;
		201	d &= d >> 31;
		202	return a + d;
		203	}
		204
		205	// Both a and b must not have the most significant bit set
		206	static inline uint32_t
		207	upos_max (uint32_t a, uint32_t b)
		208	{
		209	int32_t d = b - a;
		210	d &= d >> 31;
		211	return b - d;
		212	}
		213
		214	// this is much faster than crossfire's original algorithm
		215	// on modern cpus
		216	inline int
		217	isqrt (int n)
		218	{
		219	return (int)sqrtf ((float)n);
		220	}
		221
		222	// this is kind of like the ^^ operator, if it would exist, without sequence point.
		223	// more handy than it looks like, due to the implicit !! done on its arguments
		224	inline bool
		225	logical_xor (bool a, bool b)
		226	{
		227	return a != b;
		228	}
		229
		230	inline bool
		231	logical_implies (bool a, bool b)
		232	{
		233	return a <= b;
		234	}
		235
		236	// this is only twice as fast as naive sqrtf (dxdy+dydy)
		237	#if 0
		238	// and has a max. error of 6 in the range -100..+100.
		239	#else
		240	// and has a max. error of 9 in the range -100..+100.
		241	#endif
		242	inline int
		243	idistance (int dx, int dy)
		244	{
		245	unsigned int dx_ = abs (dx);
		246	unsigned int dy_ = abs (dy);
		247
		248	#if 0
		249	return dx_ > dy_
		250	? (dx_ * 61685 + dy_ * 26870) >> 16
		251	: (dy_ * 61685 + dx_ * 26870) >> 16;
		252	#else
		253	return dx_ + dy_ - min (dx_, dy_) * 5 / 8;
		254	#endif
		255	}
		256
		257	// can be substantially faster than floor, if your value range allows for it
		258	template<typename T>
		259	inline T
		260	fastfloor (T x)
		261	{
		262	return std::floor (x);
		263	}
		264
		265	inline float
		266	fastfloor (float x)
		267	{
		268	return sint32(x) - (x < 0);
		269	}
		270
		271	inline double
		272	fastfloor (double x)
		273	{
		274	return sint64(x) - (x < 0);
		275	}
		276
		277	/*
		278	* absdir(int): Returns a number between 1 and 8, which represent
		279	* the "absolute" direction of a number (it actually takes care of
		280	* "overflow" in previous calculations of a direction).
		281	*/
		282	inline int
		283	absdir (int d)
		284	{
		285	return ((d - 1) & 7) + 1;
		286	}
		287
		288	// avoid ctz name because netbsd or freebsd spams it's namespace with it
		289	#if GCC_VERSION(3,4)
		290	static inline int least_significant_bit (uint32_t x)
		291	{
		292	return __builtin_ctz (x);
		293	}
		294	#else
		295	int least_significant_bit (uint32_t x);
		296	#endif
		297
		298	#define for_all_bits_sparse_32(mask, idxvar) \
		299	for (uint32_t idxvar, mask_ = mask; \
		300	mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);)
		301
		302	extern ssize_t slice_alloc; // statistics
		303
		304	void *salloc_ (int n) throw (std::bad_alloc);
		305	void salloc_ (int n, void src) throw (std::bad_alloc);
		306
		307	// strictly the same as g_slice_alloc, but never returns 0
		308	template<typename T>
		309	inline T salloc (int n = 1) throw (std::bad_alloc) { return (T )salloc_ (n * sizeof (T)); }
		310
		311	// also copies src into the new area, like "memdup"
		312	// if src is 0, clears the memory
		313	template<typename T>
		314	inline T salloc (int n, T src) throw (std::bad_alloc) { return (T )salloc_ (n sizeof (T), (void *)src); }
		315
		316	// clears the memory
		317	template<typename T>
		318	inline T salloc0(int n = 1) throw (std::bad_alloc) { return (T )salloc_ (n * sizeof (T), 0); }
		319
		320	// for symmetry
		321	template<typename T>
		322	inline void sfree (T *ptr, int n = 1) throw ()
		323	{
		324	if (expect_true (ptr))
		325	{
		326	slice_alloc -= n * sizeof (T);
		327	if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T));
		328	g_slice_free1 (n * sizeof (T), (void *)ptr);
		329	assert (slice_alloc >= 0);//D
		330	}
		331	}
		332
		333	// nulls the pointer
		334	template<typename T>
		335	inline void sfree0 (T *&ptr, int n = 1) throw ()
		336	{
		337	sfree<T> (ptr, n);
		338	ptr = 0;
		339	}
16		340
17	// makes dynamically allocated objects zero-initialised	341	// makes dynamically allocated objects zero-initialised
18	struct zero_initialised	342	struct zero_initialised
19	{	343	{
20	void operator new (size_t s, void p)	344	void operator new (size_t s, void p)
23	return p;	347	return p;
24	}	348	}
25		349
26	void *operator new (size_t s)	350	void *operator new (size_t s)
27	{	351	{
28	return g_slice_alloc0 (s);	352	return salloc0<char> (s);
29	}	353	}
30		354
31	void *operator new[] (size_t s)	355	void *operator new[] (size_t s)
32	{	356	{
33	return g_slice_alloc0 (s);	357	return salloc0<char> (s);
34	}	358	}
35		359
36	void operator delete (void *p, size_t s)	360	void operator delete (void *p, size_t s)
37	{	361	{
38	g_slice_free1 (s, p);	362	sfree ((char *)p, s);
39	}	363	}
40		364
41	void operator delete[] (void *p, size_t s)	365	void operator delete[] (void *p, size_t s)
42	{	366	{
43	g_slice_free1 (s, p);	367	sfree ((char *)p, s);
44	}	368	}
45	};	369	};
46		370
47	void *salloc_ (int n) throw (std::bad_alloc);	371	// makes dynamically allocated objects zero-initialised
48	void salloc_ (int n, void src) throw (std::bad_alloc);	372	struct slice_allocated
49
50	// strictly the same as g_slice_alloc, but never returns 0
51	template<typename T>
52	inline T salloc (int n = 1) throw (std::bad_alloc) { return (T )salloc_ (n * sizeof (T)); }
53
54	// also copies src into the new area, like "memdup"
55	// if src is 0, clears the memory
56	template<typename T>
57	inline T salloc (int n, T src) throw (std::bad_alloc) { return (T )salloc_ (n sizeof (T), (void *)src); }
58
59	// clears the memory
60	template<typename T>
61	inline T salloc0(int n = 1) throw (std::bad_alloc) { return (T )salloc_ (n * sizeof (T), 0); }
62
63	// for symmetry
64	template<typename T>
65	inline void sfree (T *ptr, int n = 1) throw ()
66	{	373	{
67	g_slice_free1 (n * sizeof (T), (void *)ptr);	374	void operator new (size_t s, void p)
68	}	375	{
		376	return p;
		377	}
		378
		379	void *operator new (size_t s)
		380	{
		381	return salloc<char> (s);
		382	}
		383
		384	void *operator new[] (size_t s)
		385	{
		386	return salloc<char> (s);
		387	}
		388
		389	void operator delete (void *p, size_t s)
		390	{
		391	sfree ((char *)p, s);
		392	}
		393
		394	void operator delete[] (void *p, size_t s)
		395	{
		396	sfree ((char *)p, s);
		397	}
		398	};
69		399
70	// a STL-compatible allocator that uses g_slice	400	// a STL-compatible allocator that uses g_slice
71	// boy, this is verbose	401	// boy, this is verbose
72	template<typename Tp>	402	template<typename Tp>
73	struct slice_allocator	403	struct slice_allocator
…		…
85	{	415	{
86	typedef slice_allocator<U> other;	416	typedef slice_allocator<U> other;
87	};	417	};
88		418
89	slice_allocator () throw () { }	419	slice_allocator () throw () { }
90	slice_allocator (const slice_allocator &o) throw () { }	420	slice_allocator (const slice_allocator &) throw () { }
91	template<typename Tp2>	421	template<typename Tp2>
92	slice_allocator (const slice_allocator<Tp2> &) throw () { }	422	slice_allocator (const slice_allocator<Tp2> &) throw () { }
93		423
94	~slice_allocator () { }	424	~slice_allocator () { }
95		425
…		…
104	void deallocate (pointer p, size_type n)	434	void deallocate (pointer p, size_type n)
105	{	435	{
106	sfree<Tp> (p, n);	436	sfree<Tp> (p, n);
107	}	437	}
108		438
109	size_type max_size ()const throw ()	439	size_type max_size () const throw ()
110	{	440	{
111	return size_t (-1) / sizeof (Tp);	441	return size_t (-1) / sizeof (Tp);
112	}	442	}
113		443
114	void construct (pointer p, const Tp &val)	444	void construct (pointer p, const Tp &val)
…		…
120	{	450	{
121	p->~Tp ();	451	p->~Tp ();
122	}	452	}
123	};	453	};
124		454
		455	INTERFACE_CLASS (attachable)
125	struct refcounted	456	struct refcnt_base
126	{	457	{
127	refcounted () : refcnt (0) { }	458	typedef int refcnt_t;
128	// virtual ~refcounted ();	459	mutable refcnt_t ACC (RW, refcnt);
		460
129	void refcnt_inc () { ++refcnt; }	461	MTH void refcnt_inc () const { ++refcnt; }
130	void refcnt_dec () { --refcnt; }	462	MTH void refcnt_dec () const { --refcnt; }
131	bool dead () { return refcnt == 0; }	463
132	mutable int refcnt;	464	refcnt_base () : refcnt (0) { }
133	#if 0
134	private:
135	static refcounted *rc_first;
136	refcounted *rc_next;
137	#endif
138	};	465	};
		466
		467	// to avoid branches with more advanced compilers
		468	extern refcnt_base::refcnt_t refcnt_dummy;
139		469
140	template<class T>	470	template<class T>
141	struct refptr	471	struct refptr
142	{	472	{
		473	// p if not null
		474	refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; }
		475
		476	void refcnt_dec ()
		477	{
		478	if (!is_constant (p))
		479	--*refcnt_ref ();
		480	else if (p)
		481	--p->refcnt;
		482	}
		483
		484	void refcnt_inc ()
		485	{
		486	if (!is_constant (p))
		487	++*refcnt_ref ();
		488	else if (p)
		489	++p->refcnt;
		490	}
		491
143	T *p;	492	T *p;
144		493
145	refptr () : p(0) { }	494	refptr () : p(0) { }
146	refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); }	495	refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); }
147	refptr (T *p) : p(p) { if (p) p->refcnt_inc (); }	496	refptr (T *p) : p(p) { refcnt_inc (); }
148	~refptr () { if (p) p->refcnt_dec (); }	497	~refptr () { refcnt_dec (); }
149		498
150	const refptr<T> &operator =(T *o)	499	const refptr<T> &operator =(T *o)
151	{	500	{
		501	// if decrementing ever destroys we need to reverse the order here
152	if (p) p->refcnt_dec ();	502	refcnt_dec ();
153	p = o;	503	p = o;
154	if (p) p->refcnt_inc ();	504	refcnt_inc ();
155
156	return *this;	505	return *this;
157	}	506	}
158		507
159	const refptr<T> &operator =(const refptr<T> o)	508	const refptr<T> &operator =(const refptr<T> &o)
160	{	509	{
161	*this = o.p;	510	*this = o.p;
162	return *this;	511	return *this;
163	}	512	}
164		513
165	T &operator * () const { return *p; }	514	T &operator * () const { return *p; }
166	T *operator ->() const { return p; }	515	T *operator ->() const { return p; }
167		516
168	operator T *() const { return p; }	517	operator T *() const { return p; }
169	};	518	};
170		519
		520	typedef refptr<maptile> maptile_ptr;
		521	typedef refptr<object> object_ptr;
		522	typedef refptr<archetype> arch_ptr;
		523	typedef refptr<client> client_ptr;
		524	typedef refptr<player> player_ptr;
		525	typedef refptr<region> region_ptr;
		526
		527	#define STRHSH_NULL 2166136261
		528
		529	static inline uint32_t
		530	strhsh (const char *s)
		531	{
		532	// use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/)
		533	// it is about twice as fast as the one-at-a-time one,
		534	// with good distribution.
		535	// FNV-1a is faster on many cpus because the multiplication
		536	// runs concurrently with the looping logic.
		537	// we modify the hash a bit to improve its distribution
		538	uint32_t hash = STRHSH_NULL;
		539
		540	while (*s)
		541	hash = (hash ^ s++) 16777619U;
		542
		543	return hash ^ (hash >> 16);
		544	}
		545
		546	static inline uint32_t
		547	memhsh (const char *s, size_t len)
		548	{
		549	uint32_t hash = STRHSH_NULL;
		550
		551	while (len--)
		552	hash = (hash ^ s++) 16777619U;
		553
		554	return hash;
		555	}
		556
171	struct str_hash	557	struct str_hash
172	{	558	{
173	std::size_t operator ()(const char *s) const	559	std::size_t operator ()(const char *s) const
174	{	560	{
175	unsigned long hash = 0;
176
177	/* use the one-at-a-time hash function, which supposedly is
178	* better than the djb2-like one used by perl5.005, but
179	* certainly is better then the bug used here before.
180	* see http://burtleburtle.net/bob/hash/doobs.html
181	*/
182	while (*s)
183	{
184	hash += *s++;
185	hash += hash << 10;
186	hash ^= hash >> 6;
187	}
188
189	hash += hash << 3;
190	hash ^= hash >> 11;
191	hash += hash << 15;
192
193	return hash;	561	return strhsh (s);
		562	}
		563
		564	std::size_t operator ()(const shstr &s) const
		565	{
		566	return strhsh (s);
194	}	567	}
195	};	568	};
196		569
197	struct str_equal	570	struct str_equal
198	{	571	{
…		…
200	{	573	{
201	return !strcmp (a, b);	574	return !strcmp (a, b);
202	}	575	}
203	};	576	};
204		577
205	#include <vector>	578	// Mostly the same as std::vector, but insert/erase can reorder
206		579	// the elements, making append(=insert)/remove O(1) instead of O(n).
		580	//
		581	// NOTE: only some forms of erase are available
207	template<class obj>	582	template<class T>
208	struct unordered_vector : std::vector<obj, slice_allocator<obj> >	583	struct unordered_vector : std::vector<T, slice_allocator<T> >
209	{	584	{
210	typedef typename unordered_vector::iterator iterator;	585	typedef typename unordered_vector::iterator iterator;
211		586
212	void erase (unsigned int pos)	587	void erase (unsigned int pos)
213	{	588	{
…		…
221	{	596	{
222	erase ((unsigned int )(i - this->begin ()));	597	erase ((unsigned int )(i - this->begin ()));
223	}	598	}
224	};	599	};
225		600
226	template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }	601	// This container blends advantages of linked lists
227	template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }	602	// (efficiency) with vectors (random access) by
228	template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; }	603	// by using an unordered vector and storing the vector
		604	// index inside the object.
		605	//
		606	// + memory-efficient on most 64 bit archs
		607	// + O(1) insert/remove
		608	// + free unique (but varying) id for inserted objects
		609	// + cache-friendly iteration
		610	// - only works for pointers to structs
		611	//
		612	// NOTE: only some forms of erase/insert are available
		613	typedef int object_vector_index;
229		614
230	template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }	615	template<class T, object_vector_index T::*indexmember>
		616	struct object_vector : std::vector<T , slice_allocator<T > >
		617	{
		618	typedef typename object_vector::iterator iterator;
		619
		620	bool contains (const T *obj) const
		621	{
		622	return obj->*indexmember;
		623	}
		624
		625	iterator find (const T *obj)
		626	{
		627	return obj->*indexmember
		628	? this->begin () + obj->*indexmember - 1
		629	: this->end ();
		630	}
		631
		632	void push_back (T *obj)
		633	{
		634	std::vector<T , slice_allocator<T > >::push_back (obj);
		635	obj->*indexmember = this->size ();
		636	}
		637
		638	void insert (T *obj)
		639	{
		640	push_back (obj);
		641	}
		642
		643	void insert (T &obj)
		644	{
		645	insert (&obj);
		646	}
		647
		648	void erase (T *obj)
		649	{
		650	unsigned int pos = obj->*indexmember;
		651	obj->*indexmember = 0;
		652
		653	if (pos < this->size ())
		654	{
		655	(this)[pos - 1] = (this)[this->size () - 1];
		656	(this)[pos - 1]->indexmember = pos;
		657	}
		658
		659	this->pop_back ();
		660	}
		661
		662	void erase (T &obj)
		663	{
		664	erase (&obj);
		665	}
		666	};
		667
		668	/////////////////////////////////////////////////////////////////////////////
		669
		670	// something like a vector or stack, but without
		671	// out of bounds checking
		672	template<typename T>
		673	struct fixed_stack
		674	{
		675	T *data;
		676	int size;
		677	int max;
		678
		679	fixed_stack ()
		680	: size (0), data (0)
		681	{
		682	}
		683
		684	fixed_stack (int max)
		685	: size (0), max (max)
		686	{
		687	data = salloc<T> (max);
		688	}
		689
		690	void reset (int new_max)
		691	{
		692	sfree (data, max);
		693	size = 0;
		694	max = new_max;
		695	data = salloc<T> (max);
		696	}
		697
		698	void free ()
		699	{
		700	sfree (data, max);
		701	data = 0;
		702	}
		703
		704	~fixed_stack ()
		705	{
		706	sfree (data, max);
		707	}
		708
		709	T &operator[](int idx)
		710	{
		711	return data [idx];
		712	}
		713
		714	void push (T v)
		715	{
		716	data [size++] = v;
		717	}
		718
		719	T &pop ()
		720	{
		721	return data [--size];
		722	}
		723
		724	T remove (int idx)
		725	{
		726	T v = data [idx];
		727
		728	data [idx] = data [--size];
		729
		730	return v;
		731	}
		732	};
		733
		734	/////////////////////////////////////////////////////////////////////////////
231		735
232	// basically does what strncpy should do, but appends "..." to strings exceeding length	736	// basically does what strncpy should do, but appends "..." to strings exceeding length
		737	// returns the number of bytes actually used (including \0)
233	void assign (char dst, const char src, int maxlen);	738	int assign (char dst, const char src, int maxsize);
234		739
235	// type-safe version of assign	740	// type-safe version of assign
236	template<int N>	741	template<int N>
237	inline void assign (char (&dst)[N], const char *src)	742	inline int assign (char (&dst)[N], const char *src)
238	{	743	{
239	assign ((char *)&dst, src, N);	744	return assign ((char *)&dst, src, N);
240	}	745	}
241		746
242	typedef double tstamp;	747	typedef double tstamp;
243		748
244	// return current time as timestampe	749	// return current time as timestamp
245	tstamp now ();	750	tstamp now ();
246		751
		752	int similar_direction (int a, int b);
		753
		754	// like v?sprintf, but returns a "static" buffer
		755	char vformat (const char format, va_list ap);
		756	char format (const char format, ...) attribute ((format (printf, 1, 2)));
		757
		758	// safety-check player input which will become object->msg
		759	bool msg_is_safe (const char *msg);
		760
		761	/////////////////////////////////////////////////////////////////////////////
		762	// threads, very very thin wrappers around pthreads
		763
		764	struct thread
		765	{
		766	pthread_t id;
		767
		768	void start (void (start_routine)(void ), void arg = 0);
		769
		770	void cancel ()
		771	{
		772	pthread_cancel (id);
		773	}
		774
		775	void *join ()
		776	{
		777	void *ret;
		778
		779	if (pthread_join (id, &ret))
		780	cleanup ("pthread_join failed", 1);
		781
		782	return ret;
		783	}
		784	};
		785
		786	// note that mutexes are not classes
		787	typedef pthread_mutex_t smutex;
		788
		789	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		790	#define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		791	#else
		792	#define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER
247	#endif	793	#endif
248		794
		795	#define SMUTEX(name) smutex name = SMUTEX_INITIALISER
		796	#define SMUTEX_LOCK(name) pthread_mutex_lock (&(name))
		797	#define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name))
		798
		799	typedef pthread_cond_t scond;
		800
		801	#define SCOND(name) scond name = PTHREAD_COND_INITIALIZER
		802	#define SCOND_SIGNAL(name) pthread_cond_signal (&(name))
		803	#define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name))
		804	#define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex))
		805
		806	#endif
		807

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Comparing deliantra/server/include/util.h (file contents): Revision 1.21 by root, Thu Dec 21 06:12:36 2006 UTC vs. Revision 1.115 by root, Tue Apr 26 14:41:36 2011 UTC

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Comparing deliantra/server/include/util.h (file contents):
Revision 1.21 by root, Thu Dec 21 06:12:36 2006 UTC vs.
Revision 1.115 by root, Tue Apr 26 14:41:36 2011 UTC