package pipe
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import (
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"context"
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"github.com/v2fly/v2ray-core/v5/common/signal"
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"github.com/v2fly/v2ray-core/v5/common/signal/done"
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"github.com/v2fly/v2ray-core/v5/features/policy"
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)
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// Option for creating new Pipes.
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type Option func(*pipeOption)
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// WithoutSizeLimit returns an Option for Pipe to have no size limit.
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func WithoutSizeLimit() Option {
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return func(opt *pipeOption) {
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opt.limit = -1
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}
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}
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// WithSizeLimit returns an Option for Pipe to have the given size limit.
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func WithSizeLimit(limit int32) Option {
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return func(opt *pipeOption) {
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opt.limit = limit
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}
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}
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// DiscardOverflow returns an Option for Pipe to discard writes if full.
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func DiscardOverflow() Option {
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return func(opt *pipeOption) {
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opt.discardOverflow = true
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}
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}
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// OptionsFromContext returns a list of Options from context.
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func OptionsFromContext(ctx context.Context) []Option {
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var opt []Option
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bp := policy.BufferPolicyFromContext(ctx)
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if bp.PerConnection >= 0 {
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opt = append(opt, WithSizeLimit(bp.PerConnection))
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} else {
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opt = append(opt, WithoutSizeLimit())
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}
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return opt
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}
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// New creates a new Reader and Writer that connects to each other.
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func New(opts ...Option) (*Reader, *Writer) {
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p := &pipe{
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readSignal: signal.NewNotifier(),
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writeSignal: signal.NewNotifier(),
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done: done.New(),
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option: pipeOption{
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limit: -1,
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},
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}
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for _, opt := range opts {
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opt(&(p.option))
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}
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return &Reader{
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pipe: p,
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}, &Writer{
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pipe: p,
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}
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}
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