Intel® oneAPI Threading Building Blocks Developer Guide and API Reference
ID
772616
Date
6/24/2024
Public
A newer version of this document is available. Customers should click here to go to the newest version.
Visible to Intel only — GUID: GUID-F5F9A2B4-9FE5-4FB8-8407-6D404C0D7C5E
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
Parallel Reduction for rvalues
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-F5F9A2B4-9FE5-4FB8-8407-6D404C0D7C5E
Constrained APIs
Starting from C++20, most of oneAPI Threading Building Blocks (oneTBB) APIs are constrained to enforce named requirements on template arguments types.
The violations of these requirements are detected at a compile time during the template instantiation.
Example
// Call for body(oneapi::tbb::blocked_range) is ill-formed
// oneapi::tbb::parallel_for call results in constraint failure
auto body = [](const int& r) { /*...*/ };
oneapi::tbb::parallel_for(oneapi::tbb::blocked_range{1, 10}, body);
// Error example:
// error: no matching function to call to oneapi::tbb::parallel_for
// note: constraints not satisfied
// note: the required expression 'body(range)' is invalid
body(range);
CAUTION:
The code that violates named requirements but compiles successfully until C++20, may not compile in C++20 mode due to early and strict constraints diagnostics.