Visible to Intel only — GUID: GUID-82FADF47-C777-4E82-8099-F56C2F8D69C8
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
Invoke a Callable Object
Appendix A Costs of Time Slicing
Appendix B Mixing With Other Threading Packages
References
parallel_for_each Body semantics and requirements
parallel_sort ranges interface extension
TBB_malloc_replacement_log Function
Type-specified message keys for join_node
Scalable Memory Pools
Helper Functions for Expressing Graphs
concurrent_lru_cache
task_group extensions
The customizing mutex type for concurrent_hash_map
Visible to Intel only — GUID: GUID-82FADF47-C777-4E82-8099-F56C2F8D69C8
memory_pool_allocator
NOTE:
To enable this feature, set the TBB_PREVIEW_MEMORY_POOL macro to 1.
A class template that provides a memory pool with a C++ allocator interface.
Description
memory_pool_allocator meets the allocator requirements from the [allocator.requirements] ISO C++ Standard section It also provides a constructor to allocate and deallocate memory. This constructor is linked with an instance of either the memory_pool or the fixed_pool class. The class is mainly intended for enabling memory pools within STL containers.
API
Header
#include "oneapi/tbb/memory_pool.h"Synopsis
namespace oneapi {
namespace tbb {
template<typename T>
class memory_pool_allocator {
public:
using value_type = T;
using pointer = value_type*;
using const_pointer = const value_type*;
using reference = value_type&;
using const_reference = const value_type&;
using size_type = size_t;
using difference_type = ptrdiff_t;
template<typename U> struct rebind {
using other = memory_pool_allocator<U>;
};
explicit memory_pool_allocator(memory_pool &pool) throw();
explicit memory_pool_allocator(fixed_pool &pool) throw();
memory_pool_allocator(const memory_pool_allocator& src) throw();
template<typename U>
memory_pool_allocator(const memory_pool_allocator<U,P>& src) throw();
pointer address(reference x) const;
const_pointer address(const_reference x) const;
pointer allocate(size_type n, const void* hint=0);
void deallocate(pointer p, size_type);
size_type max_size() const throw();
void construct(pointer p, const T& value);
void destroy(pointer p);
};
template<>
class memory_pool_allocator<void> {
public:
using pointer = void*;
using const_pointer = const void*;
using value_type = void;
template<typename U> struct rebind {
using other = memory_pool_allocator<U>;
};
memory_pool_allocator(memory_pool &pool) throw();
memory_pool_allocator(fixed_pool &pool) throw();
memory_pool_allocator(const memory_pool_allocator& src) throw();
template<typename U>
memory_pool_allocator(const memory_pool_allocator<U>& src) throw();
};
} // namespace tbb
} // namespace oneapi
template<typename T, typename U>
inline bool operator==( const memory_pool_allocator<T>& a,
const memory_pool_allocator<U>& b);
template<typename T, typename U>
inline bool operator!=( const memory_pool_allocator<T>& a,
const memory_pool_allocator<U>& b);Member Functions
explicitmemory_pool_allocator(memory_pool&pool)
Effects: Constructs a memory pool allocator serviced by memory_pool instance pool.
explicitmemory_pool_allocator(fixed_pool&pool)
Effects: Constructs a memory pool allocator serviced by fixed_pool instance pool.
Examples
The code below provides a simple example of container construction with the use of a memory pool.
#define TBB_PREVIEW_MEMORY_POOL 1
#include "oneapi/tbb/memory_pool.h"
...
typedef oneapi::tbb::memory_pool_allocator<int>
pool_allocator_t;
std::list<int, pool_allocator_t> my_list(pool_allocator_t( my_pool ));