OverallocationBehavior struct
Specifies the overallocation behavior of a pool. This can be useful for reducing the frequency of allocations at the cost of potentially higher memory usage.
Public static functions
- static auto Exact() -> OverallocationBehavior
- Creates a behavior of no overallocation that allocates exactly the requested amount.
Constructors, destructors, conversion operators
- OverallocationBehavior(float requestFactor, float growFactor, uint64_t minAllocationSize)
- Creates the specified overallocation behavior.
Public functions
- auto apply(uint64_t requestedSize, uint64_t poolSize) const -> uint64_t
- Applies the overallocation behavior to the requested size, returning the desired allocation size.
Function documentation
tp::
Creates the specified overallocation behavior.
| Parameters | |
|---|---|
| requestFactor | The factor applied to requested allocation sizes. Must be greater or equal to 1. |
| growFactor | The factor applied to the total size of all allocations. Must be greater or equal to 1. |
| minAllocationSize | The size of the smallest allocation allowed to be made. The units are dependent on the specific pool. |
Given a new allocation request, the size of the actual allocation to be made is calculated with the following formula: max(floor(requestedSize * requestFactor), floor(poolSize * (growFactor - 1.0)), minAllocationSize) where requestedSize is the size of the requested allocation and poolSize is the sum of all allocations made by the pool.
uint64_t tp::
Applies the overallocation behavior to the requested size, returning the desired allocation size.
| Parameters | |
|---|---|
| requestedSize | The requested size of the allocation. |
| poolSize | The size of all allocations made by the pool so far. |