forked from jaypipes/ghw
/
memory.go
67 lines (59 loc) · 1.82 KB
/
memory.go
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//
// Use and distribution licensed under the Apache license version 2.
//
// See the COPYING file in the root project directory for full text.
//
package ghw
import (
"fmt"
"math"
)
type MemoryInfo struct {
TotalPhysicalBytes int64 `json:"total_physical_bytes"`
TotalUsableBytes int64 `json:"total_usable_bytes"`
// An array of sizes, in bytes, of memory pages supported by the host
SupportedPageSizes []uint64 `json:"supported_page_sizes"`
}
func Memory(opts ...*WithOption) (*MemoryInfo, error) {
mergeOpts := mergeOptions(opts...)
ctx := &context{
chroot: *mergeOpts.Chroot,
}
info := &MemoryInfo{}
if err := ctx.memFillInfo(info); err != nil {
return nil, err
}
return info, nil
}
func (i *MemoryInfo) String() string {
tpbs := UNKNOWN
if i.TotalPhysicalBytes > 0 {
tpb := i.TotalPhysicalBytes
unit, unitStr := unitWithString(tpb)
tpb = int64(math.Ceil(float64(i.TotalPhysicalBytes) / float64(unit)))
tpbs = fmt.Sprintf("%d%s", tpb, unitStr)
}
tubs := UNKNOWN
if i.TotalUsableBytes > 0 {
tub := i.TotalUsableBytes
unit, unitStr := unitWithString(tub)
tub = int64(math.Ceil(float64(i.TotalUsableBytes) / float64(unit)))
tubs = fmt.Sprintf("%d%s", tub, unitStr)
}
return fmt.Sprintf("memory (%s physical, %s usable)", tpbs, tubs)
}
// simple private struct used to encapsulate memory information in a top-level
// "memory" YAML/JSON map/object key
type memoryPrinter struct {
Info *MemoryInfo `json:"memory"`
}
// YAMLString returns a string with the memory information formatted as YAML
// under a top-level "memory:" key
func (i *MemoryInfo) YAMLString() string {
return safeYAML(memoryPrinter{i})
}
// JSONString returns a string with the memory information formatted as JSON
// under a top-level "memory:" key
func (i *MemoryInfo) JSONString(indent bool) string {
return safeJSON(memoryPrinter{i}, indent)
}