Module sources 

Low-level Apple Silicon metric sources.

This module exposes the SMC, IOReport, IOHID, CoreFoundation, and system profiler helpers used by crate::Sampler. It is useful for advanced integrations, debugging new hardware, or experimenting with additional Apple Silicon counters before they are added to the high-level metrics API.

Prefer crate::Sampler for regular use. The APIs in this module are lower level and may change between releases as macOS, hardware generations, and metric keys change. Low-level macOS metric sources.

Structs

IOHIDSensors

IOHID temperature sensor reader.

IOReport

IOReport subscription used to sample Apple Silicon power and residency counters.

IOReportIterator

Iterator over IOReport channel samples.

IOReportIteratorItem

One IOReport channel item returned by IOReportIterator.

IOServiceIterator

Iterator over IORegistry services matching a service name.

KeyData

Raw SMC request/response payload.

KeyDataVer

SMC protocol version payload.

KeyInfo

Metadata describing an SMC key value.

PLimitData

SMC power limit payload.

SMC

Apple System Management Controller connection.

SensorVal

Decoded SMC sensor value.

SocInfo

Static Apple Silicon system information.

Functions

cfdict_get_val

Look up a value in a CoreFoundation dictionary by string key.

cfdict_keys

Return all keys from a CoreFoundation dictionary as Rust strings.

cfio_get_props

Copy all CoreFoundation properties from an IORegistry entry.

cfio_get_residencies

Read IOReport state residency counters from a channel item.

cfio_integer_value

Read the integer value from an IOReport channel item.

cfio_watts

Convert an IOReport energy counter into Watts for a sampling duration.

cfnum

Create a CoreFoundation number object from an i32.

cfstr

Create a CoreFoundation string object from a Rust string.

from_cfstr

Convert a CoreFoundation string reference into a Rust String.

get_dvfs_mhz

Parse dynamic voltage and frequency scaling data from an IORegistry dictionary.

get_soc_info

Load cached static SoC information for the current machine.

libc_ram

Read used and total RAM in bytes via libc/mach APIs.

libc_swap

Read used and total swap in bytes via libc sysctl.

Type Aliases

CVoidRef

Raw CoreFoundation/IOKit pointer used by FFI bindings.

WithError

Error type used by low-level source helpers.