C SYNOPSIS
#include <pcp/pmapi.h>const char *pmAtomStr(const pmAtomValue *avp, int type)
cc ... -lpcp
DESCRIPTION
All performance metric values may be encoded in a pmAtomValue union, 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 */ void *vp; /* void ptr */ } pmAtomValue;
Given the performance metric value pointed to by avp, and a performance metric type defined by type, generate the corresponding metric value as a string, suitable for diagnostic or report output.
The value for type is typically extracted from a pmDesc structure, following a call to pmLookupDesc(3) for a particular performance metric.
If the type is PM_TYPE_STRING values longer than 38 characters will be truncated after 34 characters, and truncation shown with ellipsis ``...'' at the end of the value.
If the type is PM_TYPE_AGGREGATE only the first three 32-bit words are displayed as hexadecimal values.
The string value is held in a single static buffer, so the returned value is only valid until the next call to pmAtomStr.