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package main
import (
"bytes"
"errors"
"log/slog"
"os"
"os/signal"
"strconv"
"time"
"github.com/KimMachineGun/automemlimit/memlimit"
)
func init() {
slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stderr, nil)))
memlimit.SetGoMemLimitWithOpts(
memlimit.WithProvider(
FileProvider("limit.txt"),
),
memlimit.WithRefreshInterval(5*time.Second),
memlimit.WithLogger(slog.Default()),
)
}
func main() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
s := <-c
slog.Info("signal captured", slog.Any("signal", s))
}
func FileProvider(path string) memlimit.Provider {
return func() (uint64, error) {
b, err := os.ReadFile(path)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
return memlimit.ApplyFallback(memlimit.FromCgroup, memlimit.FromSystem)()
}
return 0, err
}
b = bytes.TrimSpace(b)
if len(b) == 0 {
return 0, memlimit.ErrNoLimit
}
return strconv.ParseUint(string(b), 10, 64)
}
}
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