mirror of
https://github.com/criyle/go-judge.git
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58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
package envexec
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import (
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"context"
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"golang.org/x/sync/errgroup"
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)
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// Group defines the running instruction to run multiple
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// exec in parallel restricted within cgroup
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type Group struct {
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// Cmd defines Cmd running in parallel in multiple environments
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Cmd []*Cmd
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// Pipes defines the potential mapping between Cmd.
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// ensure nil is used as placeholder in correspond cmd
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Pipes []*Pipe
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}
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// PipeIndex defines the index of cmd and the fd of the that cmd
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type PipeIndex struct {
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Index int
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Fd int
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}
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// Pipe defines the pipe between parallel Cmd
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type Pipe struct {
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In, Out PipeIndex
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}
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// Run starts the cmd and returns exec results
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func (r *Group) Run(ctx context.Context) ([]Result, error) {
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// prepare files
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fds, pipeToCollect, err := prepareFds(r)
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if err != nil {
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return nil, err
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}
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// wait all cmd to finish
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var g errgroup.Group
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result := make([]Result, len(r.Cmd))
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for i, c := range r.Cmd {
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i, c := i, c
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g.Go(func() error {
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r, err := runSingle(ctx, c, fds[i], pipeToCollect[i])
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result[i] = r
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if err != nil {
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result[i].Status = StatusInternalError
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result[i].Error = err.Error()
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return err
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}
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return nil
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})
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}
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err = g.Wait()
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return result, err
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}
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