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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package util
import (
"errors"
"math"
"syscall"
"time"
)
/* misc */
// GetFdLimits returns a current values for file descriptors limits.
func GetFdLimits() (soft uint64, hard uint64, err error) {
return math.MaxUint64, math.MaxUint64, nil // syscall.RLIM_INFINITY
}
// SetFdSoftLimit sets a new file descriptors soft limit.
func SetFdSoftLimit(_ uint64) error {
return nil
}
// Getrusage gets file descriptors usage statistics
func Getrusage(who int, rusage *syscall.Rusage) (err error) {
if rusage != nil {
*rusage = syscall.Rusage{}
err = nil
} else {
err = errors.New("invalid parameter")
}
return
}
// GetCurrentProcessTimes gets current process kernel and usermode times
func GetCurrentProcessTimes() (utime int64, stime int64, err error) {
var Ktime, Utime syscall.Filetime
var handle syscall.Handle
handle, err = syscall.GetCurrentProcess()
if err == nil {
err = syscall.GetProcessTimes(handle, nil, nil, &Ktime, &Utime)
}
if err == nil {
utime = filetimeToDuration(&Utime).Nanoseconds()
stime = filetimeToDuration(&Ktime).Nanoseconds()
} else {
utime = 0
stime = 0
}
return
}
func filetimeToDuration(ft *syscall.Filetime) time.Duration {
n := int64(ft.HighDateTime)<<32 + int64(ft.LowDateTime) // in 100-nanosecond intervals
return time.Duration(n * 100)
}
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