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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | C SYNOPSIS | DESCRIPTION | RETURNS | SEE ALSO | COLOPHON |
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MMV_LOOK...ALUE_DESC(3) Library Functions Manual MMV_LOOK...ALUE_DESC(3)
mmv_lookup_value_desc - find a value in the Memory Mapped Value
file
#include <pcp/pmapi.h>
#include <pcp/mmv_stats.h>
pmAtomValue *mmv_lookup_value_desc(void *addr, const char
*metric, const char *inst);
cc ... -lpcp_mmv -lpcp
mmv_lookup_value_desc searches for the value of the instance
identified by the external instance name inst of the metric met‐
ric in the MMV(5) file. addr is the address returned from
mmv_stats_init().
The pointer returned points to a pmAtomValue union, which is de‐
fined as follows:
typedef union {
__int32_t l; /* 32-bit signed */
__uint32_t ul; /* 32-bit unsigned */
__int64_t ll; /* 64-bit signed */
__uint64_t ull; /* 64-bit unsigned */
float f; /* 32-bit floating point */
double d; /* 64-bit floating point */
char *cp; /* char ptr */
pmValueBlock *vbp; /* pmValueBlock ptr */
} pmAtomValue;
MMV string values should be set using either of the
mmv_set_string or mmv_set_strlen routines.
The function returns the address inside of the memory mapped re‐
gion on success or NULL on failure.
mmv_stats_init(3), mmv_inc_value(3) and mmv(5).
This page is part of the PCP (Performance Co-Pilot) project. In‐
formation about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
[email protected]. This page was obtained from the project's
upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
(At that time, the date of the most recent commit that was found
in the repository was 2024-06-14.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
Performance Co-Pilot MMV_LOOK...ALUE_DESC(3)
Pages that refer to this page: mmv_inc_value(3), mmv_set_value(3), mmv_stats_init(3), mmv_stats_registry(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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