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kstat_solaris_cgo.go
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kstat_solaris_cgo.go
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// +build solaris,cgo
package gkstat
// #cgo LDFLAGS: -lkstat
// #include <sys/sysinfo.h>
// #include <kstat.h>
import "C"
import (
"errors"
"fmt"
)
var ErrNotFound = errors.New("Not found")
var ErrNotNamedKStat = errors.New("Not a named kstat")
type KStat struct {
ks *C.kstat_ctl_t
ksp *C.kstat_t
readData bool
}
// Open kstat for reading.
func Open() (*KStat, error) {
ks, err := C.kstat_open()
if ks == nil && err != nil {
return nil, err
}
return &KStat{ks: ks}, nil
}
// Closes the kstat.
func (k *KStat) Close() error {
_, err := C.kstat_close(k.ks)
return err
}
func (k *KStat) Find(filters ...filter) (*KStatItem, error) {
defer closeFilters(filters)
ks := k.ks.kc_chain
for {
if ks == nil {
return nil, ErrNotFound
}
if matchFilters(ks, filters) {
return k.KStatItem(ks)
}
ks = ks.ks_next
}
}
func (k *KStat) Scan(filters ...filter) <-chan *KStatItem {
iC := make(chan *KStatItem)
go func(iC chan<- *KStatItem, filters []filter) {
defer closeFilters(filters)
ks := k.ks.kc_chain
for {
if ks == nil {
close(iC)
return
}
if matchFilters(ks, filters) {
if ksi, err := k.KStatItem(ks); err == nil {
iC <- ksi
} else {
fmt.Printf("failed to create kstat item: %s\n", err)
}
}
ks = ks.ks_next
}
}(iC, filters)
return iC
}
func (k *KStat) KStatItem(ksi *C.kstat_t) (*KStatItem, error) {
_, err := C.kstat_read(k.ks, ksi, nil)
return &KStatItem{ks: ksi}, err
}