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Comparing deliantra/server/include/util.h (file contents):
Revision 1.62 by root, Fri Jan 25 18:13:57 2008 UTC vs.
Revision 1.70 by root, Sun Apr 20 05:24:55 2008 UTC

… …
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 0xaa // poison memory before freeing it if != 0
26#define DEBUG_SALLOC 26#define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs
27#define PREFER_MALLOC 0 // use malloc and not the slice allocator
27 28
28#if __GNUC__ >= 3 29#if __GNUC__ >= 3
29# define is_constant(c) __builtin_constant_p (c) 30# define is_constant(c) __builtin_constant_p (c)
30# define expect(expr,value) __builtin_expect ((expr),(value)) 31# define expect(expr,value) __builtin_expect ((expr),(value))
31# define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 32# define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
… …
43// is mostly true or mosty false. note that these return 44// is mostly true or mosty false. note that these return
44// booleans, not the expression. 45// booleans, not the expression.
45#define expect_false(expr) expect ((expr) != 0, 0) 46#define expect_false(expr) expect ((expr) != 0, 0)
46#define expect_true(expr) expect ((expr) != 0, 1) 47#define expect_true(expr) expect ((expr) != 0, 1)
47 48
49#include <pthread.h>
50
48#include <cstddef> 51#include <cstddef>
49#include <cmath> 52#include <cmath>
50#include <new> 53#include <new>
51#include <vector> 54#include <vector>
52 55
53#include <glib.h> 56#include <glib.h>
54 57
55#include <shstr.h> 58#include <shstr.h>
56#include <traits.h> 59#include <traits.h>
57 60
58#ifdef DEBUG_SALLOC 61#if DEBUG_SALLOC
59# define g_slice_alloc0(s) debug_slice_alloc0(s) 62# define g_slice_alloc0(s) debug_slice_alloc0(s)
60# define g_slice_alloc(s) debug_slice_alloc(s) 63# define g_slice_alloc(s) debug_slice_alloc(s)
61# define g_slice_free1(s,p) debug_slice_free1(s,p) 64# define g_slice_free1(s,p) debug_slice_free1(s,p)
62void *g_slice_alloc (unsigned long size); 65void *g_slice_alloc (unsigned long size);
63void *g_slice_alloc0 (unsigned long size); 66void *g_slice_alloc0 (unsigned long size);
64void g_slice_free1 (unsigned long size, void *ptr); 67void g_slice_free1 (unsigned long size, void *ptr);
68#elif PREFER_MALLOC
69# define g_slice_alloc0(s) calloc (1, (s))
70# define g_slice_alloc(s) malloc ((s))
71# define g_slice_free1(s,p) free ((p))
65#endif 72#endif
66 73
67// 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)
68#define auto(var,expr) decltype(expr) var = (expr) 75#define auto(var,expr) decltype(expr) var = (expr)
69 76
… …
80 87
81// in range excluding end 88// in range excluding end
82#define IN_RANGE_EXC(val,beg,end) \ 89#define IN_RANGE_EXC(val,beg,end) \
83 ((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))
84 91
92void cleanup (const char *cause, bool make_core = false);
85void fork_abort (const char *msg); 93void fork_abort (const char *msg);
86 94
87// 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,
88// 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.
89template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } 97template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; }
90template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } 98template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; }
91template<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; } 99template<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; }
92 100
93template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 101template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
102
103template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); }
104template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); }
94 105
95template<typename T> 106template<typename T>
96static inline T 107static inline T
97lerp (T val, T min_in, T max_in, T min_out, T max_out) 108lerp (T val, T min_in, T max_in, T min_out, T max_out)
98{ 109{
… …
182absdir (int d) 193absdir (int d)
183{ 194{
184 return ((d - 1) & 7) + 1; 195 return ((d - 1) & 7) + 1;
185} 196}
186 197
187extern size_t slice_alloc; // statistics 198extern ssize_t slice_alloc; // statistics
188
189// makes dynamically allocated objects zero-initialised
190struct zero_initialised
191{
192 void *operator new (size_t s, void *p)
193 {
194 memset (p, 0, s);
195 return p;
196 }
197
198 void *operator new (size_t s)
199 {
200 slice_alloc += s;
201 return g_slice_alloc0 (s);
202 }
203
204 void *operator new[] (size_t s)
205 {
206 slice_alloc += s;
207 return g_slice_alloc0 (s);
208 }
209
210 void operator delete (void *p, size_t s)
211 {
212 slice_alloc -= s;
213 g_slice_free1 (s, p);
214 }
215
216 void operator delete[] (void *p, size_t s)
217 {
218 slice_alloc -= s;
219 g_slice_free1 (s, p);
220 }
221};
222 199
223void *salloc_ (int n) throw (std::bad_alloc); 200void *salloc_ (int n) throw (std::bad_alloc);
224void *salloc_ (int n, void *src) throw (std::bad_alloc); 201void *salloc_ (int n, void *src) throw (std::bad_alloc);
225 202
226// strictly the same as g_slice_alloc, but never returns 0 203// strictly the same as g_slice_alloc, but never returns 0
… …
238 215
239// for symmetry 216// for symmetry
240template<typename T> 217template<typename T>
241inline void sfree (T *ptr, int n = 1) throw () 218inline void sfree (T *ptr, int n = 1) throw ()
242{ 219{
243#ifdef PREFER_MALLOC 220 if (expect_true (ptr))
244 free (ptr); 221 {
245#else
246 slice_alloc -= n * sizeof (T); 222 slice_alloc -= n * sizeof (T);
223 if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T));
247 g_slice_free1 (n * sizeof (T), (void *)ptr); 224 g_slice_free1 (n * sizeof (T), (void *)ptr);
248#endif 225 assert (slice_alloc >= 0);//D
226 }
249} 227}
228
229// makes dynamically allocated objects zero-initialised
230struct zero_initialised
231{
232 void *operator new (size_t s, void *p)
233 {
234 memset (p, 0, s);
235 return p;
236 }
237
238 void *operator new (size_t s)
239 {
240 return salloc0<char> (s);
241 }
242
243 void *operator new[] (size_t s)
244 {
245 return salloc0<char> (s);
246 }
247
248 void operator delete (void *p, size_t s)
249 {
250 sfree ((char *)p, s);
251 }
252
253 void operator delete[] (void *p, size_t s)
254 {
255 sfree ((char *)p, s);
256 }
257};
250 258
251// a STL-compatible allocator that uses g_slice 259// a STL-compatible allocator that uses g_slice
252// boy, this is verbose 260// boy, this is verbose
253template<typename Tp> 261template<typename Tp>
254struct slice_allocator 262struct slice_allocator
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266 { 274 {
267 typedef slice_allocator<U> other; 275 typedef slice_allocator<U> other;
268 }; 276 };
269 277
270 slice_allocator () throw () { } 278 slice_allocator () throw () { }
271 slice_allocator (const slice_allocator &o) throw () { } 279 slice_allocator (const slice_allocator &) throw () { }
272 template<typename Tp2> 280 template<typename Tp2>
273 slice_allocator (const slice_allocator<Tp2> &) throw () { } 281 slice_allocator (const slice_allocator<Tp2> &) throw () { }
274 282
275 ~slice_allocator () { } 283 ~slice_allocator () { }
276 284
… …
285 void deallocate (pointer p, size_type n) 293 void deallocate (pointer p, size_type n)
286 { 294 {
287 sfree<Tp> (p, n); 295 sfree<Tp> (p, n);
288 } 296 }
289 297
290 size_type max_size ()const throw () 298 size_type max_size () const throw ()
291 { 299 {
292 return size_t (-1) / sizeof (Tp); 300 return size_t (-1) / sizeof (Tp);
293 } 301 }
294 302
295 void construct (pointer p, const Tp &val) 303 void construct (pointer p, const Tp &val)
… …
565int similar_direction (int a, int b); 573int similar_direction (int a, int b);
566 574
567// like sprintf, but returns a "static" buffer 575// like sprintf, but returns a "static" buffer
568const char *format (const char *format, ...); 576const char *format (const char *format, ...);
569 577
578/////////////////////////////////////////////////////////////////////////////
579// threads, very very thin wrappers around pthreads
580
581struct thread
582{
583 pthread_t id;
584
585 void start (void *(*start_routine)(void *), void *arg = 0);
586
587 void cancel ()
588 {
589 pthread_cancel (id);
590 }
591
592 void *join ()
593 {
594 void *ret;
595
596 if (pthread_join (id, &ret))
597 cleanup ("pthread_join failed", 1);
598
599 return ret;
600 }
601};
602
603// note that mutexes are not classes
604typedef pthread_mutex_t smutex;
605
606#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
607 #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
608#else
609 #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER
570#endif 610#endif
571 611
612#define SMUTEX(name) smutex name = SMUTEX_INITIALISER
613#define SMUTEX_LOCK(name) pthread_mutex_lock (&(name))
614#define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name))
615
616typedef pthread_cond_t scond;
617
618#define SCOND(name) scond name = PTHREAD_COND_INITIALIZER
619#define SCOND_SIGNAL(name) pthread_cond_signal (&(name))
620#define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name))
621#define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex))
622
623#endif
624

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