48 lines
1.7 KiB
Go
48 lines
1.7 KiB
Go
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of go-ethereum.
|
|
//
|
|
// go-ethereum is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// go-ethereum 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 General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package fdlimit
|
|
|
|
import "errors"
|
|
|
|
// Raise tries to maximize the file descriptor allowance of this process
|
|
// to the maximum hard-limit allowed by the OS.
|
|
func Raise(max uint64) error {
|
|
// This method is NOP by design:
|
|
// * Linux/Darwin counterparts need to manually increase per process limits
|
|
// * On Windows Go uses the CreateFile API, which is limited to 16K files, non
|
|
// changeable from within a running process
|
|
// This way we can always "request" raising the limits, which will either have
|
|
// or not have effect based on the platform we're running on.
|
|
if max > 16384 {
|
|
return errors.New("file descriptor limit (16384) reached")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Current retrieves the number of file descriptors allowed to be opened by this
|
|
// process.
|
|
func Current() (int, error) {
|
|
// Please see Raise for the reason why we use hard coded 16K as the limit
|
|
return 16384, nil
|
|
}
|
|
|
|
// Maximum retrieves the maximum number of file descriptors this process is
|
|
// allowed to request for itself.
|
|
func Maximum() (int, error) {
|
|
return Current()
|
|
}
|