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std::pointer_traits<Ptr>::pointer_to – std::pointer_traits<Ptr>::pointer_to Synopsis Defined in header <memory> static pointer (1) (since C++11) pointer_to( element_type& r ); (member of pointer_traits<Ptr> specialization) static pointer (since C++11) pointer_to( element_type& r ) noexcept; (until C++20)                                         (2) (member of pointer_traits<T*> specialization) static constexpr pointer (since C++20) pointer_to( element_type& r ) noexcept; (member of pointer_traits<T*> specialization) Constructs a dereferenceable pointer…

std::pointer_traits – std::pointer_traits Synopsis Defined in header <memory> template< class Ptr > struct pointer_traits; (1) (since C++11) template< class T > struct pointer_traits<T*>; (2) (since C++11) The pointer_traits class template provides the standardized way to access certain properties of pointer-like types (fancy_pointers, such as boost::interprocess::offset_ptr). The standard template std::allocator_traits relies on pointer_traits to determine the…

std::pointer_to_unary_function – std::pointer_to_unary_function Synopsis template< class Arg, (deprecated in C++11) class Result (removed in C++17) > class pointer_to_unary_function : public std::unary_function<Arg, Result>; std::pointer_to_unary_function is a function object that acts as a wrapper around a unary function. Member functions               constructs a new pointer_to_unary_function object with the supplied function constructor (public member function)               calls the stored function…

std::pointer_to_binary_function – std::pointer_to_binary_function Synopsis template< class Arg1, (deprecated in C++11) class Arg2, (removed in C++17) class Result > class pointer_to_binary_function : public std::binary_function<Arg1, Arg2, Result>; std::pointer_to_binary_function is a function object that acts as a wrapper around a binary function. Member functions               constructs a new pointer_to_binary_function object with the supplied function constructor (public member function)               calls…

std::pointer_safety – std::pointer_safety Synopsis Defined in header <memory> enum class pointer_safety { relaxed, preferred, (since C++11) strict }; The scoped enumeration type pointer_safety lists the pointer safety modes supported by C++ Enumeration constants pointer_safety::strict Only safely-derived pointers (pointers to objects allocated with new or subobjects thereof) may be dereferenced or deallocated. Garbage collector may be…

std::pmr::unsynchronized_pool_resource::upstream_resource – std::pmr::unsynchronized_pool_resource::upstream_resource Synopsis std::pmr::memory_resource* upstream_resource() const; (since C++17) Returns a pointer to the upstream memory resource. This is the same value as the upstream argument passed to the constructor of this object. See also               Constructs a unsynchronized_pool_resource constructor (public member function)

std::pmr::unsynchronized_pool_resource::~unsynchronized_pool_resource – std::pmr::unsynchronized_pool_resource::~unsynchronized_pool_resource Synopsis virtual ~unsynchronized_pool_resource(); (since C++17) Destroys a unsynchronized_pool_resource. Deallocates all memory owned by this resource by calling this->release(). See also         Release all allocated memory release (public member function)

std::pmr::unsynchronized_pool_resource::release – std::pmr::unsynchronized_pool_resource::release Synopsis void release(); (since C++ 17) Releases all memory owned by this resource by calling the deallocate function of the upstream memory resource as needed. Memory is released back to the upstream resource even if deallocate has not been called for some of the allocated blocks. See also            deallocates memory deallocate (public…

std::pmr::unsynchronized_pool_resource::options – std::pmr::unsynchronized_pool_resource::options Synopsis std::pmr::pool_options options() const; (since C++17) Returns the options that controls the pooling behavior of this resource. The values in the returned struct may differ from those supplied to the constructor in the following ways: * Values of zero will be replaced with implementation-specified defaults; * Sizes may be rounded to an…

std::pmr::unsynchronized_pool_resource::do_is_equal – std::pmr::unsynchronized_pool_resource::do_is_equal Synopsis virtual bool do_is_equal(const std::pmr::memory_resource& other) const noexcept; (since C++17) Compare *this with other for identity – memory allocated using a unsynchronized_pool_resource can only be deallocated using that same resource. Return value this == &other Defect report The following behavior-changing defect reports were applied retroactively to previously published C++ standards. DR Applied…

std::pmr::unsynchronized_pool_resource::do_deallocate – std::pmr::unsynchronized_pool_resource::do_deallocate Synopsis virtual void do_deallocate(void* p, std::size_t bytes, std::size_t alignment); (since C++17) Returns the memory at p to the pool. It is unspecified if or under what circumstances this operation will result in a call to deallocate() on the upstream memory resource. Exceptions Throws nothing. See also               deallocates memory deallocate (public member function…

std::pmr::unsynchronized_pool_resource::do_allocate – std::pmr::unsynchronized_pool_resource::do_allocate Synopsis virtual void* do_allocate(std::size_t bytes, std::size_t alignment); (since C++17) Allocates storage. If the pool selected for a block of size bytes is unable to satisfy the request from its internal data structures, calls allocate() on the upstream memory resource to obtain memory. If the size requested is larger than what the largest…

std::pmr::unsynchronized_pool_resource – std::pmr::unsynchronized_pool_resource Synopsis Defined in header <memory_resource> class unsynchronized_pool_resource : public std::pmr::memory_resource; (since C++17) The class std::pmr::unsynchronized_pool_resource is a general-purpose memory resource class with the following properties: * It owns the allocated memory and frees it on destruction, even if deallocate has not been called for some of the allocated blocks. * It consists…

std::pmr::synchronized_pool_resource::upstream_resource – std::pmr::synchronized_pool_resource::upstream_resource Synopsis std::pmr::memory_resource* upstream_resource() const; (since C++17) Returns a pointer to the upstream memory resource. This is the same value as the upstream argument passed to the constructor of this object. See also               Constructs a synchronized_pool_resource constructor (public member function)

std::pmr::synchronized_pool_resource::~synchronized_pool_resource – std::pmr::synchronized_pool_resource::~synchronized_pool_resource Synopsis virtual ~synchronized_pool_resource(); (since C++17) Destroys a synchronized_pool_resource. Deallocates all memory owned by this resource by calling this->release(). See also         Release all allocated memory release (public member function)

std::pmr::synchronized_pool_resource::release – std::pmr::synchronized_pool_resource::release Synopsis void release(); (since C++ 17) Releases all memory owned by this resource by calling the deallocate function of the upstream memory resource as needed. Memory is released back to the upstream resource even if deallocate has not been called for some of the allocated blocks. See also            deallocates memory deallocate (public…

std::pmr::synchronized_pool_resource::options – std::pmr::synchronized_pool_resource::options Synopsis std::pmr::pool_options options() const; (since C++17) Returns the options that controls the pooling behavior of this resource. The values in the returned struct may differ from those supplied to the constructor in the following ways: * Values of zero will be replaced with implementation-specified defaults; * Sizes may be rounded to an…

std::pmr::synchronized_pool_resource::do_is_equal – std::pmr::synchronized_pool_resource::do_is_equal Synopsis virtual bool do_is_equal(const std::pmr::memory_resource& other) const noexcept; (since C++17) Compare *this with other for identity – memory allocated using a synchronized_pool_resource can only be deallocated using that same resource. Return value this == &other Defect report The following behavior-changing defect reports were applied retroactively to previously published C++ standards. DR Applied…

std::pmr::synchronized_pool_resource::do_deallocate – std::pmr::synchronized_pool_resource::do_deallocate Synopsis virtual void do_deallocate(void* p, std::size_t bytes, std::size_t alignment); (since C++17) Returns the memory at p to the pool. It is unspecified if or under what circumstances this operation will result in a call to deallocate() on the upstream memory resource. Exceptions Throws nothing. See also               deallocates memory deallocate (public member function…

std::pmr::synchronized_pool_resource::do_allocate – std::pmr::synchronized_pool_resource::do_allocate Synopsis virtual void* do_allocate(std::size_t bytes, std::size_t alignment); (since C++17) Allocates storage. If the pool selected for a block of size bytes is unable to satisfy the request from its internal data structures, calls allocate() on the upstream memory resource to obtain memory. If the size requested is larger than what the largest…