найти значение в файле сопоставленных значений памяти (find a value in the Memory Mapped Value file)
Имя (Name)
mmv_lookup_value_desc - find a value in the Memory Mapped Value
file
Синопсис C (C Synopsis)
#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
Описание (Description)
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.
Возвращаемое значение (Return value)
The function returns the address inside of the memory mapped
region on success or NULL on failure.
Смотри также (See also)
mmv_stats_init(3), mmv_inc_value(3) and mmv(5).
