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/** |
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* memory.h: Memory templates. |
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* |
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* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team |
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* Rights to this code are documented in doc/pod/gplicense.pod. |
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* |
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* $Id: memory.h,v 1.5 2007-09-16 18:54:42 pippijn Exp $ |
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*/ |
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|
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#ifndef ERMYTH_MEMORY_H |
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#define ERMYTH_MEMORY_H |
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|
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#include <vector> |
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|
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#include <ermyth/type_traits.h> |
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|
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namespace impl |
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{ |
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inline void * |
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smalloc (size_t n) throw (std::bad_alloc) |
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{ |
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void *ptr = malloc (n); |
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|
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if (!ptr) |
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throw std::bad_alloc (); |
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|
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return ptr; |
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} |
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|
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inline void * |
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smalloc (size_t n, void const * const src) throw (std::bad_alloc) |
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{ |
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void *ptr = smalloc (n); |
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|
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if (src) |
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memcpy (ptr, src, n); |
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else |
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memset (ptr, 0, n); |
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|
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return ptr; |
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} |
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|
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// safe and slow version of above: never tries to copy more than len from src |
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inline void * |
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smalloc (size_t n, void *src, size_t len) throw (std::bad_alloc) |
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{ |
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size_t max = n >= len ? n : len; |
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void *ptr = smalloc (max); |
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|
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if (src) |
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{ |
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memcpy (ptr, src, len); |
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memset (((char *)(ptr)) + len, 0, max - len); // XXX: hack to allow pointer arithmetic |
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} |
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else |
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memset (ptr, 0, max); |
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|
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return ptr; |
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} |
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} |
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|
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template<typename T> |
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inline T * |
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salloc (size_t n = 1) throw (std::bad_alloc) |
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{ |
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return (T *) impl::smalloc (n * sizeof (T)); |
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} |
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|
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template<typename T> |
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inline T * |
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salloc (size_t n, T const * const src) throw (std::bad_alloc) |
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{ |
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return (T *) impl::smalloc (n * sizeof (T), src); |
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} |
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|
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// template counterpart of the safe copying allocator |
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template<typename T> |
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inline T * |
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salloc (size_t n, T *src, size_t len) throw (std::bad_alloc) |
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{ |
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return (T *) impl::smalloc (n * sizeof (T), src, len); |
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} |
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|
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template<typename T> |
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inline T * |
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salloc (size_t n, char c) throw (std::bad_alloc) |
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{ |
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T *ptr = (T *) impl::smalloc (n * sizeof (T)); |
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return memset (ptr, c, n * sizeof (T)); |
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} |
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|
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template<typename T> |
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inline void |
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sfree (T *ptr) throw () |
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{ |
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free (ptr); |
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} |
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|
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template<typename T> |
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inline void |
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sfree (T *ptr, size_t n) throw () |
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{ |
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free (ptr); |
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} |
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|
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// makes dynamically allocated objects zero-initialised |
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struct zero_initialised |
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{ |
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void *operator new (size_t s) |
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{ |
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void *p = impl::smalloc (s); |
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memset (p, 0, s); |
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return p; |
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} |
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|
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void *operator new[] (size_t s) |
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{ |
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void *p = impl::smalloc (s); |
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memset (p, 0, s); |
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return p; |
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} |
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|
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void operator delete (void *p, size_t s) |
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{ |
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free (p); |
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} |
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|
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void operator delete[] (void *p, size_t s) |
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{ |
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free (p); |
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} |
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}; |
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|
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E char *sstrdup (char const * const s); |
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E char *sstrndup (char const * const s, size_t len); |
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|
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template<size_t N> |
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inline char * |
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sstrndup (char const (&s)[N]) |
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{ |
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return sstrndup (s, N); |
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} |
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|
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struct garbage_collector |
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{ |
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void insert (void *p) |
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{ |
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mortals.push_back (p); |
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} |
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|
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void collect () |
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{ |
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while (!mortals.empty ()) |
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{ |
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sfree (mortals.back ()); |
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mortals.pop_back (); |
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} |
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} |
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|
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private: |
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std::vector<void *> mortals; |
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}; |
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|
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E garbage_collector gc; |
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|
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#endif |
