70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
package client
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import (
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"sync"
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"sync/atomic"
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"time"
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)
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var callStatePool sync.Pool
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var zeroTime time.Time
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type CallState struct {
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ID uint64
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Method string
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Args interface{}
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Result interface{}
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Error error
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DoneChan chan *CallState
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hasResponse bool
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canceled uint32
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}
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func (cs *CallState) done() {
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select {
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case cs.DoneChan <- cs:
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// ok
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default:
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// We don't want to block here. It is the caller's responsibility to make
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// sure the channel has enough buffer space. See comment in Go().
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// if debugLog {
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// log.Println("rpc: discarding Call reply due to insufficient Done chan capacity")
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// }
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}
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}
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// Cancel cancels async call.
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//
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// Canceled call isn't sent to the server unless it is already sent there.
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// Canceled call may successfully complete if it has been already sent
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// to the server before Cancel call.
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//
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// It is safe calling this function multiple times from concurrently
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// running goroutines.
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func (cs *CallState) Cancel() {
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atomic.StoreUint32(&cs.canceled, 1)
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}
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func (cs *CallState) IsCanceled() bool {
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return atomic.LoadUint32(&cs.canceled) != 0
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}
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func retainCallState() *CallState {
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v := callStatePool.Get()
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if v == nil {
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return &CallState{}
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}
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return v.(*CallState)
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}
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func releaseCallState(cs *CallState) {
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cs.Method = ""
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cs.Args = nil
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cs.Result = nil
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cs.Error = nil
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cs.DoneChan = nil
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callStatePool.Put(cs)
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}
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