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172 | absdir (int d) |
172 | absdir (int d) |
173 | { |
173 | { |
174 | return ((d - 1) & 7) + 1; |
174 | return ((d - 1) & 7) + 1; |
175 | } |
175 | } |
176 | |
176 | |
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177 | extern size_t slice_alloc; // statistics |
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178 | |
177 | // makes dynamically allocated objects zero-initialised |
179 | // makes dynamically allocated objects zero-initialised |
178 | struct zero_initialised |
180 | struct zero_initialised |
179 | { |
181 | { |
180 | void *operator new (size_t s, void *p) |
182 | void *operator new (size_t s, void *p) |
181 | { |
183 | { |
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183 | return p; |
185 | return p; |
184 | } |
186 | } |
185 | |
187 | |
186 | void *operator new (size_t s) |
188 | void *operator new (size_t s) |
187 | { |
189 | { |
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190 | slice_alloc += s; |
188 | return g_slice_alloc0 (s); |
191 | return g_slice_alloc0 (s); |
189 | } |
192 | } |
190 | |
193 | |
191 | void *operator new[] (size_t s) |
194 | void *operator new[] (size_t s) |
192 | { |
195 | { |
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196 | slice_alloc += s; |
193 | return g_slice_alloc0 (s); |
197 | return g_slice_alloc0 (s); |
194 | } |
198 | } |
195 | |
199 | |
196 | void operator delete (void *p, size_t s) |
200 | void operator delete (void *p, size_t s) |
197 | { |
201 | { |
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202 | slice_alloc -= s; |
198 | g_slice_free1 (s, p); |
203 | g_slice_free1 (s, p); |
199 | } |
204 | } |
200 | |
205 | |
201 | void operator delete[] (void *p, size_t s) |
206 | void operator delete[] (void *p, size_t s) |
202 | { |
207 | { |
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208 | slice_alloc -= s; |
203 | g_slice_free1 (s, p); |
209 | g_slice_free1 (s, p); |
204 | } |
210 | } |
205 | }; |
211 | }; |
206 | |
212 | |
207 | void *salloc_ (int n) throw (std::bad_alloc); |
213 | void *salloc_ (int n) throw (std::bad_alloc); |
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225 | inline void sfree (T *ptr, int n = 1) throw () |
231 | inline void sfree (T *ptr, int n = 1) throw () |
226 | { |
232 | { |
227 | #ifdef PREFER_MALLOC |
233 | #ifdef PREFER_MALLOC |
228 | free (ptr); |
234 | free (ptr); |
229 | #else |
235 | #else |
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236 | slice_alloc -= n * sizeof (T); |
230 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
237 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
231 | #endif |
238 | #endif |
232 | } |
239 | } |
233 | |
240 | |
234 | // a STL-compatible allocator that uses g_slice |
241 | // a STL-compatible allocator that uses g_slice |
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333 | |
340 | |
334 | typedef tausworthe_random_generator rand_gen; |
341 | typedef tausworthe_random_generator rand_gen; |
335 | |
342 | |
336 | extern rand_gen rndm; |
343 | extern rand_gen rndm; |
337 | |
344 | |
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345 | INTERFACE_CLASS (attachable) |
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346 | struct refcnt_base |
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347 | { |
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348 | typedef int refcnt_t; |
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349 | mutable refcnt_t ACC (RW, refcnt); |
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350 | |
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351 | MTH void refcnt_inc () const { ++refcnt; } |
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352 | MTH void refcnt_dec () const { --refcnt; } |
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353 | |
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354 | refcnt_base () : refcnt (0) { } |
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355 | }; |
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356 | |
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357 | // to avoid branches with more advanced compilers |
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358 | extern refcnt_base::refcnt_t refcnt_dummy; |
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359 | |
338 | template<class T> |
360 | template<class T> |
339 | struct refptr |
361 | struct refptr |
340 | { |
362 | { |
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363 | // p if not null |
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364 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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365 | |
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366 | void refcnt_dec () |
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367 | { |
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368 | if (!is_constant (p)) |
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369 | --*refcnt_ref (); |
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370 | else if (p) |
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371 | --p->refcnt; |
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372 | } |
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373 | |
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374 | void refcnt_inc () |
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375 | { |
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376 | if (!is_constant (p)) |
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377 | ++*refcnt_ref (); |
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378 | else if (p) |
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379 | ++p->refcnt; |
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380 | } |
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381 | |
341 | T *p; |
382 | T *p; |
342 | |
383 | |
343 | refptr () : p(0) { } |
384 | refptr () : p(0) { } |
344 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
385 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
345 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
386 | refptr (T *p) : p(p) { refcnt_inc (); } |
346 | ~refptr () { if (p) p->refcnt_dec (); } |
387 | ~refptr () { refcnt_dec (); } |
347 | |
388 | |
348 | const refptr<T> &operator =(T *o) |
389 | const refptr<T> &operator =(T *o) |
349 | { |
390 | { |
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391 | // if decrementing ever destroys we need to reverse the order here |
350 | if (p) p->refcnt_dec (); |
392 | refcnt_dec (); |
351 | p = o; |
393 | p = o; |
352 | if (p) p->refcnt_inc (); |
394 | refcnt_inc (); |
353 | |
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354 | return *this; |
395 | return *this; |
355 | } |
396 | } |
356 | |
397 | |
357 | const refptr<T> &operator =(const refptr<T> o) |
398 | const refptr<T> &operator =(const refptr<T> &o) |
358 | { |
399 | { |
359 | *this = o.p; |
400 | *this = o.p; |
360 | return *this; |
401 | return *this; |
361 | } |
402 | } |
362 | |
403 | |
363 | T &operator * () const { return *p; } |
404 | T &operator * () const { return *p; } |
364 | T *operator ->() const { return p; } |
405 | T *operator ->() const { return p; } |
365 | |
406 | |
366 | operator T *() const { return p; } |
407 | operator T *() const { return p; } |
367 | }; |
408 | }; |
368 | |
409 | |
369 | typedef refptr<maptile> maptile_ptr; |
410 | typedef refptr<maptile> maptile_ptr; |
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511 | // return current time as timestampe |
552 | // return current time as timestampe |
512 | tstamp now (); |
553 | tstamp now (); |
513 | |
554 | |
514 | int similar_direction (int a, int b); |
555 | int similar_direction (int a, int b); |
515 | |
556 | |
516 | // like printf, but returns a std::string |
557 | // like sprintf, but returns a "static" buffer |
517 | const std::string format (const char *format, ...); |
558 | const char *format (const char *format, ...); |
518 | |
559 | |
519 | #endif |
560 | #endif |
520 | |
561 | |