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std::allocator_traits::allocate

提供: cppreference.com

 
 
動的なメモリ管理
低レベルのメモリ管理
アロケータ
Original:
Allocators
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allocator
allocator_traits(C++11)
allocator_arg_t(C++11)
allocator_arg(C++11)
uses_allocator(C++11)
scoped_allocator_adaptor(C++11)
ストレージを初期化されていない
Original:
Uninitialized storage
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uninitialized_copy
uninitialized_copy_n(C++11)
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
スマートポインタ
Original:
Smart pointers
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unique_ptr(C++11)
shared_ptr(C++11)
weak_ptr(C++11)
auto_ptr(廃止予定)
owner_less(C++11)
enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
default_delete(C++11)
ガベージコレクションをサポートしています
Original:
Garbage collection support
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declare_reachable(C++11)
undeclare_reachable(C++11)
declare_no_pointers(C++11)
undeclare_no_pointers(C++11)
pointer_safety(C++11)
get_pointer_safety(C++11)
その他
Original:
Miscellaneous
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pointer_traits(C++11)
addressof(C++11)
align(C++11)
Cライブラリ
Original:
C Library
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std::allocator_traits
メンバ関数
Original:
Member functions
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allocator_traits::allocate
allocator_traits::deallocate
allocator_traits::construct
allocator_traits::destroy
allocator_traits::max_size
allocator_traits::select_on_container_copy_construction
 
Defined in header <memory>
static pointer allocate( Alloc& a, size_type n );
(1) (C++11およびそれ以降)
static pointer allocate( Alloc& a, size_type n, const_void_pointer hint );
(2) (C++11およびそれ以降)
1)
aを呼び出すことによって、初期化されていないストレージのn*sizeof(Alloc::value_type)バイトを割り当てることアロケータa.allocate(n)を使用しています
Original:
Uses the allocator a to allocate n*sizeof(Alloc::value_type) bytes of uninitialized storage, by calling a.allocate(n)
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2)
メモリ局所性ヒントaで初期化されていないストレージのn*sizeof(Alloc::value_type)バイトを割り当てることアロケータhintを使用しています。 a.allocate(n, hint)可能であれば、呼び出します。それができない場合(例えば、どの2つの引数のメンバ関数ALLOCATE()は持っていません)、a.allocate(n)呼び出します
Original:
Uses the allocator a to allocate n*sizeof(Alloc::value_type) bytes of uninitialized storage with the memory locality hint hint. Calls a.allocate(n, hint) if possible. If not possible (e.g. a has no two-argument member function allocate()), calls a.allocate(n)
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[編集] パラメータ

a -
使用するアロケータ
Original:
allocator to use
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n -
にストレージを割り当てたオブジェクトの数
Original:
the number of objects to allocate storage for
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hint -
近くのメモリ位置へのポインタ
Original:
pointer to a nearby memory location
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[編集] 値を返します

ポインタがa.allocate(n)の呼び出しによって返された
Original:
The pointer returned by the call to a.allocate(n)
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[編集] も参照してください

初期化されていないストレージが割り当てられます
Original:
allocates uninitialized storage
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(パブリックメンバ関数of std::allocator) [edit]