libs/libtorrent/patches/110-fix-no-posix_memalign.patch

   1 Index: libtorrent-0.12.6_r1209/rak/allocators.h
   2 ===================================================================
   3 --- libtorrent-0.12.6_r1209.orig/rak/allocators.h       2010-11-10 12:40:28.000000000 +0100
   4 +++ libtorrent-0.12.6_r1209/rak/allocators.h    2011-04-13 16:33:28.179339669 +0200
   5 @@ -74,17 +74,13 @@
   6    size_type max_size () const throw() { return std::numeric_limits<size_t>::max() / sizeof(T); }
   7
   8    pointer allocate(size_type num, const_void_pointer hint = 0) { return alloc_size(num*sizeof(T)); }
   9 +  void deallocate (pointer p, size_type num) { dealloc_size(p, num*sizeof(T)); }
  10
  11 -  static pointer alloc_size(size_type size) {
  12 -    pointer ptr = NULL;
  13 -    int __UNUSED result = posix_memalign((void**)&ptr, LT_SMP_CACHE_BYTES, size);
  14 -
  15 -    return ptr;
  16 -  }
  17 +  static pointer alloc_size(size_type size);
  18 +  static void dealloc_size(pointer p, size_type size);
  19
  20    void construct (pointer p, const T& value) { new((void*)p)T(value); }
  21    void destroy (pointer p) { p->~T(); }
  22 -  void deallocate (pointer p, size_type num) { free((void*)p); }
  23  };
  24
  25
  26 @@ -98,6 +94,36 @@
  27    return false;
  28  }
  29
  30 +template <class T>
  31 +inline typename cacheline_allocator<T>::pointer cacheline_allocator<T>::alloc_size(size_type size) {
  32 +  pointer ptr;
  33 +
  34 +#if HAVE_POSIX_MEMALIGN
  35 +  if (posix_memalign((void**)&ptr, LT_SMP_CACHE_BYTES, size))
  36 +    return NULL;
  37 +#else
  38 +  char* org = (char*)malloc(size + sizeof(void*) + LT_SMP_CACHE_BYTES - 1);
  39 +  if (org == NULL)
  40 +    return NULL;
  41 +
  42 +  ptr = (pointer)((uintptr_t)(org + LT_SMP_CACHE_BYTES - 1) & ~(LT_SMP_CACHE_BYTES - 1));
  43 +
  44 +  // store originally allocated pointer for later free() at the end of the allocated data
  45 +  *(void**)((char*)ptr + size) = org;
  46 +#endif
  47 +
  48 +  return ptr;
  49 +}
  50 +
  51 +template <class T>
  52 +inline void cacheline_allocator<T>::dealloc_size(pointer p, size_type size) {
  53 +#if HAVE_POSIX_MEMALIGN
  54 +  free(p);
  55 +#else
  56 +  free(*(void**)((char*)p + size));
  57 +#endif
  58 +}
  59 +
  60  }
  61
  62  //