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460 | refcnt_buf (void *data, size_t size); |
460 | refcnt_buf (void *data, size_t size); |
461 | |
461 | |
462 | refcnt_buf (const refcnt_buf &src) |
462 | refcnt_buf (const refcnt_buf &src) |
463 | { |
463 | { |
464 | data = src.data; |
464 | data = src.data; |
465 | ++_refcnt (); |
465 | inc (); |
466 | } |
466 | } |
467 | |
467 | |
468 | ~refcnt_buf (); |
468 | ~refcnt_buf (); |
469 | |
469 | |
470 | refcnt_buf &operator =(const refcnt_buf &src); |
470 | refcnt_buf &operator =(const refcnt_buf &src); |
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… | |
479 | return _size (); |
479 | return _size (); |
480 | } |
480 | } |
481 | |
481 | |
482 | protected: |
482 | protected: |
483 | enum { |
483 | enum { |
484 | overhead = sizeof (unsigned int) * 2 |
484 | overhead = sizeof (uint32_t) * 2 |
485 | }; |
485 | }; |
486 | |
486 | |
487 | unsigned int &_size () const |
487 | uint32_t &_size () const |
488 | { |
488 | { |
489 | return ((unsigned int *)data)[-2]; |
489 | return ((unsigned int *)data)[-2]; |
490 | } |
490 | } |
491 | |
491 | |
492 | unsigned int &_refcnt () const |
492 | uint32_t &_refcnt () const |
493 | { |
493 | { |
494 | return ((unsigned int *)data)[-1]; |
494 | return ((unsigned int *)data)[-1]; |
495 | } |
495 | } |
496 | |
496 | |
497 | void _alloc (unsigned int size) |
497 | void _alloc (uint32_t size) |
498 | { |
498 | { |
499 | data = ((char *)salloc<char> (size + overhead)) + overhead; |
499 | data = ((char *)salloc<char> (size + overhead)) + overhead; |
500 | _size () = size; |
500 | _size () = size; |
501 | _refcnt () = 1; |
501 | _refcnt () = 1; |
502 | } |
502 | } |
503 | |
503 | |
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504 | void _dealloc (); |
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505 | |
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506 | void inc () |
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507 | { |
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508 | ++_refcnt (); |
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509 | } |
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510 | |
504 | void dec () |
511 | void dec () |
505 | { |
512 | { |
506 | if (!--_refcnt ()) |
513 | if (!--_refcnt ()) |
507 | sfree<char> (data - overhead, size () + overhead); |
514 | _dealloc (); |
508 | } |
515 | } |
509 | }; |
516 | }; |
510 | |
517 | |
511 | INTERFACE_CLASS (attachable) |
518 | INTERFACE_CLASS (attachable) |
512 | struct refcnt_base |
519 | struct refcnt_base |