mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
877832da69
This change extends the support for multiple envvars when specifying swarm resources to consider ALL of the specified environment variables instead of the first match. Signed-off-by: Evan Lezar <elezar@nvidia.com>
128 lines
2.6 KiB
Go
128 lines
2.6 KiB
Go
/**
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# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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**/
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package image
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import (
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"strings"
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)
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// VisibleDevices represents the devices selected in a container image
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// through the NVIDIA_VISIBLE_DEVICES or other environment variables
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type VisibleDevices interface {
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List() []string
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Has(string) bool
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}
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var _ VisibleDevices = (*all)(nil)
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var _ VisibleDevices = (*none)(nil)
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var _ VisibleDevices = (*void)(nil)
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var _ VisibleDevices = (*devices)(nil)
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// newVisibleDevices creates a VisibleDevices based on the value of the specified envvar.
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func newVisibleDevices(envvars ...string) VisibleDevices {
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for _, envvar := range envvars {
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if envvar == "all" {
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return all{}
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}
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if envvar == "none" {
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return none{}
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}
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if envvar == "" || envvar == "void" {
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return void{}
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}
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}
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return newDevices(envvars...)
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}
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type all struct{}
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// List returns ["all"] for all devices
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func (a all) List() []string {
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return []string{"all"}
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}
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// Has for all devices is true for any id except the empty ID
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func (a all) Has(id string) bool {
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return id != ""
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}
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type none struct{}
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// List returns [""] for the none devices
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func (n none) List() []string {
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return []string{""}
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}
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// Has for none devices is false for any id
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func (n none) Has(id string) bool {
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return false
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}
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type void struct {
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none
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}
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// List returns nil for the void devices
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func (v void) List() []string {
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return nil
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}
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type devices struct {
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len int
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lookup map[string]int
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}
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func newDevices(idOrCommaSeparated ...string) devices {
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lookup := make(map[string]int)
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i := 0
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for _, commaSeparated := range idOrCommaSeparated {
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for _, id := range strings.Split(commaSeparated, ",") {
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lookup[id] = i
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i++
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}
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}
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d := devices{
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len: i,
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lookup: lookup,
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}
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return d
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}
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// List returns the list of requested devices
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func (d devices) List() []string {
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list := make([]string, d.len)
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for id, i := range d.lookup {
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list[i] = id
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}
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return list
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}
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// Has checks whether the specified ID is in the set of requested devices
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func (d devices) Has(id string) bool {
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if id == "" {
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return false
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}
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_, exist := d.lookup[id]
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return exist
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}
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