Visible to Intel only — GUID: GUID-A8F5AF17-C640-4DA5-92D0-9340E46DE998
Package Contents
Parallelizing Simple Loops
Parallelizing Complex Loops
Parallelizing Data Flow and Dependence Graphs
Work Isolation
Exceptions and Cancellation
Containers
Mutual Exclusion
Timing
Memory Allocation
The Task Scheduler
Design Patterns
Migrating from Threading Building Blocks (TBB)
Constrained APIs
Appendix A Costs of Time Slicing
Appendix B Mixing With Other Threading Packages
References
oneapi::tbb::info namespace
parallel_for_each Body semantics and requirements
parallel_sort ranges interface extension
Type-specified message keys for join_node
Scalable Memory Pools
Helper Functions for Expressing Graphs
concurrent_lru_cache
task_arena::constraints extensions
oneapi::tbb::info namespace extensions
task_group extensions
The customizing mutex type for concurrent_hash_map
Visible to Intel only — GUID: GUID-A8F5AF17-C640-4DA5-92D0-9340E46DE998
memory_pool
NOTE:
To enable this feature, set the TBB_PREVIEW_MEMORY_POOL macro to 1.
A class template for scalable memory allocation from memory blocks provided by an underlying allocator.
Description
A memory_pool allocates and frees memory in a way that scales with the number of processors. The memory is obtained as big chunks from an underlying allocator specified by the template argument. The latter must satisfy the subset of the allocator requirements from the [allocator.requirements] ISO C++ Standard section. A memory_pool meet the Memory Pool named requirement.
CAUTION:
If the underlying allocator refers to another scalable memory pool, the inner pool (or pools) must be destroyed before the outer pool is destroyed or recycled.
API
Header
#include "oneapi/tbb/memory_pool.h"
Synopsis
namespace oneapi {
namespace tbb {
template <typename Alloc>
class memory_pool {
public:
explicit memory_pool(const Alloc &src = Alloc());
memory_pool(const memory_pool& other) = delete;
memory_pool& operator=(const memory_pool& other) = delete;
~memory_pool();
void recycle();
void *malloc(size_t size);
void free(void* ptr);
void *realloc(void* ptr, size_t size);
};
}
}
Member Functions
explicitmemory_pool(constAlloc&src=Alloc())
Effects: Constructs a memory pool with an instance of underlying memory allocator of type Alloc copied from src. Throws the bad_alloc exception if runtime fails to construct an instance of the class.
Examples
The code below provides a simple example of allocation from an extensible memory pool.
#define TBB_PREVIEW_MEMORY_POOL 1 #include "oneapi/tbb/memory_pool.h" ... oneapi::tbb::memory_pool<std::allocator<char> > my_pool; void* my_ptr = my_pool.malloc(10); my_pool.free(my_ptr);