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PAPI_library_init
Langue: en
Version: September, 2004 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
PAPI_library_init - initialize the PAPI library. PAPI_is_initialized - check for initialization.
SYNOPSIS
C Interface#include <papi.h> int PAPI_library_init(int version); int PAPI_is_initialized(void);Fortran Interface
#include fpapi.h PAPIF_library_init(C_INT check) PAPIF_is_initialized(C_INT check)
DESCRIPTION
PAPI_library_init() initializes the PAPI library. It must be called before any low level PAPI functions can be used. If your application is making use of threads PAPI_thread_init(3) must also be called prior to making any calls to the library other than PAPI_library_init().PAPI_is_initialized() returns the status of the PAPI library. The PAPI library can be in one of three states, as described under RETURN VALUES.
ARGUMENTS
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_library_init : On success, this function returns PAPI_VER_CURRENT . A positive return code other than PAPI_VER_CURRENT indicates a library version mis-match. A negative error code indicates an initialization error.PAPI_is_initialized:
PAPI_NOT_INITED
-- PAPI has not been initialized
PAPI_LOW_LEVEL_INITED
-- PAPI_library_init has been called
PAPI_HIGH_LEVEL_INITED
-- a high level PAPI function has been called
ERRORS
PAPI_is_initialized never returns an error.PAPI_library_init can return the following:
- PAPI_EINVAL
- papi.h is different from the version used to compile the PAPI library.
- PAPI_ENOMEM
- Insufficient memory to complete the operation.
- PAPI_ESBSTR
- This substrate does not support the underlying hardware.
- PAPI_ESYS
- A system or C library call failed inside PAPI, see the errno variable.
EXAMPLES
int retval; /* Initialize the library */ retval = PAPI_library_init(PAPI_VER_CURRENT); if (retval != PAPI_VER_CURRENT && retval > 0) { fprintf(stderr,"PAPI library version mismatch!\n"); exit(1); } if (retval < 0) handle_error(retval); retval = PAPI_is_initialized(); if (retval != PAPI_LOW_LEVEL_INITED) handle_error(retval);
BUGS
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(3), PAPI(3)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre