47 lines
939 B
Go
47 lines
939 B
Go
package exec
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import (
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"context"
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"fmt"
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)
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// LimitingBackend 用有界信号量限制底层 agent 并发，保护 GPU/API 资源。
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type LimitingBackend struct {
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inner Backend
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sem chan struct{}
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}
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// WrapWithConcurrencyLimit 包装 backend；max<=0 时默认 8。
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func WrapWithConcurrencyLimit(inner Backend, max int) Backend {
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if inner == nil {
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return nil
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}
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if max <= 0 {
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max = 8
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}
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return &LimitingBackend{
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inner: inner,
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sem: make(chan struct{}, max),
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}
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}
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func (l *LimitingBackend) Name() string {
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if l.inner == nil {
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return "limiting"
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}
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return l.inner.Name()
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}
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func (l *LimitingBackend) Execute(ctx context.Context, req Request) (*Result, error) {
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select {
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case l.sem <- struct{}{}:
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defer func() { <-l.sem }()
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case <-ctx.Done():
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return &Result{
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Success: false,
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ErrorReason: fmt.Sprintf("agent concurrency wait canceled: %v", ctx.Err()),
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}, ctx.Err()
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}
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return l.inner.Execute(ctx, req)
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}
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