cppdraft_translate/cppdraft/mem/res/monotonic/buffer/general.md

[mem.res.monotonic.buffer.general]

20 Memory management library [mem]

20.5 Memory resources [mem.res]

20.5.6 Class monotonic_buffer_resource [mem.res.monotonic.buffer]

20.5.6.1 General [mem.res.monotonic.buffer.general]

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A monotonic_buffer_resource is a special-purpose memory resource intended for very fast memory allocations in situations where memory is used to build up a few objects and then is released all at once when the memory resource object is destroyed.

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namespace std::pmr {class monotonic_buffer_resource : public memory_resource { memory_resource* upstream_rsrc; // exposition onlyvoid* current_buffer; // exposition only size_t next_buffer_size; // exposition onlypublic:explicit monotonic_buffer_resource(memory_resource* upstream); monotonic_buffer_resource(size_t initial_size, memory_resource* upstream); monotonic_buffer_resource(void* buffer, size_t buffer_size, memory_resource* upstream);

monotonic_buffer_resource(): monotonic_buffer_resource(get_default_resource()) {}explicit monotonic_buffer_resource(size_t initial_size): monotonic_buffer_resource(initial_size, get_default_resource()) {} monotonic_buffer_resource(void* buffer, size_t buffer_size): monotonic_buffer_resource(buffer, buffer_size, get_default_resource()) {} monotonic_buffer_resource(const monotonic_buffer_resource&) = delete; virtual ~monotonic_buffer_resource();

monotonic_buffer_resource& operator=(const monotonic_buffer_resource&) = delete; void release(); memory_resource* upstream_resource() const; protected:void* do_allocate(size_t bytes, size_t alignment) override; void do_deallocate(void* p, size_t bytes, size_t alignment) override; bool do_is_equal(const memory_resource& other) const noexcept override; };}