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package engine
import (
"fmt"
"github.com/mumax/3/cuda"
"github.com/mumax/3/data"
"github.com/mumax/3/httpfs"
"github.com/mumax/3/script"
"github.com/mumax/3/timer"
"github.com/mumax/3/util"
"io"
"sync"
"time"
)
var Table = *newTable("table") // output handle for tabular data (average magnetization etc.)
const TableAutoflushRate = 5 // auto-flush table every X seconds
func init() {
DeclFunc("TableAdd", TableAdd, "Add quantity as a column to the data table.")
DeclFunc("TableAddVar", TableAddVariable, "Add user-defined variable + name + unit to data table.")
DeclFunc("TableSave", TableSave, "Save the data table right now (appends one line).")
DeclFunc("TableAutoSave", TableAutoSave, "Auto-save the data table every period (s). Zero disables save.")
DeclFunc("TablePrint", TablePrint, "Print anyting in the data table")
Table.Add(&M)
}
type DataTable struct {
output interface {
io.Writer
Flush() error
}
info
outputs []Quantity
autosave
flushlock sync.Mutex
}
func (t *DataTable) Write(p []byte) (int, error) {
n, err := t.output.Write(p)
util.FatalErr(err)
return n, err
}
func (t *DataTable) Flush() error {
if t.output == nil {
return nil
}
if cuda.Synchronous {
timer.Start("io")
}
err := t.output.Flush()
if cuda.Synchronous {
timer.Stop("io")
}
util.FatalErr(err)
return err
}
func newTable(name string) *DataTable {
t := new(DataTable)
t.name = name
return t
}
func TableAdd(col Quantity) {
Table.Add(col)
}
func TableAddVariable(x script.ScalarFunction, name, unit string) {
Table.AddVariable(x, name, unit)
}
func (t *DataTable) AddVariable(x script.ScalarFunction, name, unit string) {
TableAdd(&userVar{x, name, unit})
}
type userVar struct {
value script.ScalarFunction
name, unit string
}
func (x *userVar) Name() string { return x.name }
func (x *userVar) NComp() int { return 1 }
func (x *userVar) Unit() string { return x.unit }
func (x *userVar) average() []float64 { return []float64{x.value.Float()} }
func (x *userVar) EvalTo(dst *data.Slice) {
avg := x.average()
for c := 0; c < x.NComp(); c++ {
cuda.Memset(dst.Comp(c), float32(avg[c]))
}
}
func TableSave() {
Table.Save()
}
func TableAutoSave(period float64) {
Table.autosave = autosave{period, Time, -1, nil} // count -1 allows output on t=0
}
func (t *DataTable) Add(output Quantity) {
if t.inited() {
util.Fatal("data table add ", NameOf(output), ": need to add quantity before table is output the first time")
}
t.outputs = append(t.outputs, output)
}
func (t *DataTable) Save() {
t.flushlock.Lock() // flush during write gives errShortWrite
defer t.flushlock.Unlock()
if cuda.Synchronous {
timer.Start("io")
}
t.init()
fprint(t, Time)
for _, o := range t.outputs {
vec := AverageOf(o)
for _, v := range vec {
fprint(t, "\t", float32(v))
}
}
fprintln(t)
//t.flush()
t.count++
if cuda.Synchronous {
timer.Stop("io")
}
}
func (t *DataTable) Println(msg ...interface{}) {
t.init()
fprintln(t, msg...)
}
func TablePrint(msg ...interface{}) {
Table.Println(msg...)
}
// open writer and write header
func (t *DataTable) init() {
if t.inited() {
return
}
f, err := httpfs.Create(OD() + t.name + ".txt")
util.FatalErr(err)
t.output = f
// write header
fprint(t, "# t (s)")
for _, o := range t.outputs {
if o.NComp() == 1 {
fprint(t, "\t", NameOf(o), " (", UnitOf(o), ")")
} else {
for c := 0; c < o.NComp(); c++ {
fprint(t, "\t", NameOf(o)+string('x'+c), " (", UnitOf(o), ")")
}
}
}
fprintln(t)
t.Flush()
// periodically flush so GUI shows graph,
// but don't flush after every output for performance
// (httpfs flush is expensive)
go func() {
for {
time.Sleep(TableAutoflushRate * time.Second)
Table.flush()
}
}()
}
func (t *DataTable) inited() bool {
return t.output != nil
}
func (t *DataTable) flush() {
t.flushlock.Lock()
defer t.flushlock.Unlock()
t.Flush()
}
// Safe fmt.Fprint, will fail on error
func fprint(out io.Writer, x ...interface{}) {
_, err := fmt.Fprint(out, x...)
util.FatalErr(err)
}
// Safe fmt.Fprintln, will fail on error
func fprintln(out io.Writer, x ...interface{}) {
_, err := fmt.Fprintln(out, x...)
util.FatalErr(err)
}
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