std::pmr::pool_options

 

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Dynamic memory management

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Defined in header <memory_resource>
struct pool_options;		(since C++17)

std::pmr::pool_options is a set of constructor options for pool resources including std::pmr::synchronized_pool_resource and std::pmr::unsynchronized_pool_resource.

Data members

Member	Meaning
std::size_t max_blocks_per_chunk;	The maximum number of blocks that will be allocated at once from the upstream std::pmr::memory_resource to replenish the pool. If the value of max_blocks_per_chunk is zero or is greater than an implementation-defined limit, that limit is used instead. The implementation may choose to use a smaller value than is specified in this field and may use different values for different pools.
std::size_t largest_required_pool_block;	The largest allocation size that is required to be fulfilled using the pooling mechanism. Attempts to allocate a single block larger than this threshold will be allocated directly from the upstream std::pmr::memory_resource. If largest_required_pool_block is zero or is greater than an implementation-defined limit, that limit is used instead. The implementation may choose a pass-through threshold larger than specified in this field.

See also

synchronized_pool_resource (C++17)	a thread-safe std::pmr::memory_resource for managing allocations in pools of different block sizes (class)
unsynchronized_pool_resource (C++17)	a thread-unsafe std::pmr::memory_resource for managing allocations in pools of different block sizes (class)