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NAME | C SYNOPSIS | DESCRIPTION | RETURNS | SEE ALSO | COLOPHON |
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MMV_LOOKUP_VALUE_DESC(3)Library Functions ManualMMV_LOOKUP_VALUE_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
metric in the MMV(5) file. addr is the address returned from
mmv_stats_init().
The pointer returned points to a pmAtomValue union, which is
defined 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
region 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.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2022-12-17.
(At that time, the date of the most recent commit that was found
in the repository was 2022-12-16.) If you discover any rendering
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corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Performance Co-Pilot MMV_LOOKUP_VALUE_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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