PAPI_library_init Class Reference

initialize the PAPI library. More...


Detailed Description

Parameters:
version upon initialization, PAPI checks the argument against the internal value of PAPI_VER_CURRENT when the library was compiled. This guards against portability problems when updating the PAPI shared libraries on your system.
Return values:
PAPI_EINVAL papi.h is different from the version used to compile the PAPI library.
PAPI_ENOMEM Insufficient memory to complete the operation.
PAPI_ECMP This component does not support the underlying hardware.
PAPI_ESYS A system or C library call failed inside PAPI, see the errno variable.

PAPI_library_init() initializes the PAPI library. PAPI_is_initialized() check for initialization. It must be called before any low level PAPI functions can be used. If your application is making use of threads PAPI_thread_init must also be called prior to making any calls to the library other than PAPI_library_init() .

Examples:
        int retval;
        retval = PAPI_library_init(PAPI_VER_CURRENT);
        if (retval != PAPI_VER_CURRENT && retval > 0) {
            fprintf(stderr,"PAPI library version mismatch!\en");
            exit(1); }
        if (retval < 0)
            handle_error(retval);
        retval = PAPI_is_initialized();
        if (retval != PAPI_LOW_LEVEL_INITED)
            handle_error(retval)    
Bug:
If you don't call this before using any of the low level PAPI calls, your application could core dump.
See also:
PAPI_thread_init PAPI

The documentation for this class was generated from the following file:

Generated on 8 Sep 2016 for PAPI by  doxygen 1.6.1