20 General utilities library [utilities]

20.12 Memory resources [mem.res]

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

20.12.6.3 Members [mem.res.monotonic.buffer.mem]

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void release();
1
#
Effects: Calls upstream_­rsrc->deallocate() as necessary to release all allocated memory.
2
#
[Note 1:
The memory is released back to upstream_­rsrc even if some blocks that were allocated from this have not been deallocated from this.
— end note]
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memory_resource* upstream_resource() const;
3
#
Returns: The value of upstream_­rsrc.
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void* do_allocate(size_t bytes, size_t alignment) override;
4
#
Effects: If the unused space in current_­buffer can fit a block with the specified bytes and alignment, then allocate the return block from current_­buffer; otherwise set current_­buffer to upstream_­rsrc->allocate(n, m), where n is not less than max(bytes, next_­buffer_­size) and m is not less than alignment, and increase next_­buffer_­size by an implementation-defined growth factor (which need not be integral), then allocate the return block from the newly-allocated current_­buffer.
5
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Returns: A pointer to allocated storage ([basic.stc.dynamic.allocation]) with a size of at least bytes.
The size and alignment of the allocated memory shall meet the requirements for a class derived from memory_­resource ([mem.res.class]).
6
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Throws: Nothing unless upstream_­rsrc->allocate() throws.
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void do_deallocate(void* p, size_t bytes, size_t alignment) override;
7
#
Effects: None.
8
#
Throws: Nothing.
9
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Remarks: Memory used by this resource increases monotonically until its destruction.
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bool do_is_equal(const memory_resource& other) const noexcept override;
10
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Returns: this == &other.