mirror of
https://github.com/criyle/go-judge.git
synced 2025-11-04 14:50:02 +08:00
75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package envexec
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
"golang.org/x/sync/errgroup"
|
|
)
|
|
|
|
// Group defines the running instruction to run multiple
|
|
// exec in parallel restricted within cgroup
|
|
type Group struct {
|
|
// EnvironmentPool defines pool used for runner environment
|
|
EnvironmentPool EnvironmentPool
|
|
|
|
// Cmd defines Cmd running in parallel in multiple environments
|
|
Cmd []*Cmd
|
|
|
|
// Pipes defines the potential mapping between Cmd.
|
|
// ensure nil is used as placeholder in correspond cmd
|
|
Pipes []*Pipe
|
|
}
|
|
|
|
// PipeIndex defines the index of cmd and the fd of the that cmd
|
|
type PipeIndex struct {
|
|
Index int
|
|
Fd int
|
|
}
|
|
|
|
// Pipe defines the pipe between parallel Cmd
|
|
type Pipe struct {
|
|
In, Out PipeIndex
|
|
}
|
|
|
|
// Run starts the cmd and returns exec results
|
|
func (r *Group) Run(ctx context.Context) ([]Result, error) {
|
|
// prepare files
|
|
fds, pipeToCollect, fileToClose, err := prepareFds(r)
|
|
defer func() { closeFiles(fileToClose) }()
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// prepare environments
|
|
ms := make([]Environment, 0, len(r.Cmd))
|
|
for range r.Cmd {
|
|
m, err := r.EnvironmentPool.Get()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to get environment %v", err)
|
|
}
|
|
defer r.EnvironmentPool.Put(m)
|
|
ms = append(ms, m)
|
|
}
|
|
|
|
// wait all cmd to finish
|
|
var g errgroup.Group
|
|
result := make([]Result, len(r.Cmd))
|
|
for i, c := range r.Cmd {
|
|
i, c := i, c
|
|
g.Go(func() error {
|
|
r, err := runSingle(ctx, ms[i], c, fds[i], pipeToCollect[i])
|
|
result[i] = r
|
|
if err != nil {
|
|
result[i].Status = StatusInternalError
|
|
result[i].Error = err.Error()
|
|
return err
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
err = g.Wait()
|
|
return result, err
|
|
}
|