Intel® Integrated Performance Primitives Developer Reference

Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

GetNumThreads

Returns the number of existing threads in the multithreading environment.

Syntax

Case 1: Getting number of threads for operations on objects of 32-bit size
IppStatus ippGetNumThreads(int*
pNumThr
);
Case 2: Getting number of threads for operations with TL functions based on the Platform Aware API
IppStatus ippGetNumThreads_LT(int*
pNumThr
);
Case 3: Getting number of threads for operations with TL functions based on the Classic API
IppStatus ippGetNumThreads_T(int*
pNumThr
);
Include Files
ippcore.h
ippcore_tl.h
Parameters
pNumThr
Pointer to the number of threads.
Description
This function returns the number of OpenMP* threads specified by the user previously. If it is not specified, the function returns the initial number of threads that depends on the number of logical processors.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error condition when the
pMhz
 pointer is
NULL
.
ippStsNoOperation
Indicates that there is no such operation in the static version of the library.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804