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https://github.com/infiniflow/ragflow.git
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956357b997
### What problem does this PR solve? core module for agent layer built on top of graph engine #16039 ### Type of change - [x] New Feature (non-breaking change which adds functionality)
109 lines
1.7 KiB
Go
109 lines
1.7 KiB
Go
package core
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import "sync"
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// turnBuffer is a thread-safe blocking buffer used internally by AgentLoop.
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type turnBuffer[T any] struct {
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buf []T
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mu sync.Mutex
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notEmpty *sync.Cond
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closed bool
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woken bool
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}
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func newTurnBuffer[T any]() *turnBuffer[T] {
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tb := &turnBuffer[T]{}
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tb.notEmpty = sync.NewCond(&tb.mu)
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return tb
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}
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// TrySend enqueues a value. Returns false if the buffer is closed — no panic.
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func (tb *turnBuffer[T]) TrySend(value T) bool {
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tb.mu.Lock()
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defer tb.mu.Unlock()
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if tb.closed {
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return false
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}
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tb.buf = append(tb.buf, value)
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tb.notEmpty.Signal()
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return true
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}
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func (tb *turnBuffer[T]) Receive() (T, bool) {
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tb.mu.Lock()
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defer tb.mu.Unlock()
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for len(tb.buf) == 0 && !tb.closed && !tb.woken {
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tb.notEmpty.Wait()
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}
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tb.woken = false
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if len(tb.buf) == 0 {
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var zero T
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return zero, false
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}
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val := tb.buf[0]
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tb.buf = tb.buf[1:]
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return val, true
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}
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func (tb *turnBuffer[T]) Close() {
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tb.mu.Lock()
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defer tb.mu.Unlock()
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if !tb.closed {
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tb.closed = true
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tb.notEmpty.Broadcast()
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}
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}
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func (tb *turnBuffer[T]) IsClosed() bool {
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tb.mu.Lock()
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defer tb.mu.Unlock()
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return tb.closed
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}
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func (tb *turnBuffer[T]) TakeAll() []T {
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tb.mu.Lock()
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defer tb.mu.Unlock()
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if len(tb.buf) == 0 {
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return nil
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}
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values := tb.buf
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tb.buf = nil
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return values
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}
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func (tb *turnBuffer[T]) PushFront(values []T) {
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if len(values) == 0 {
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return
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}
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tb.mu.Lock()
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defer tb.mu.Unlock()
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tb.buf = append(append([]T{}, values...), tb.buf...)
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tb.notEmpty.Signal()
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}
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func (tb *turnBuffer[T]) Wakeup() {
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tb.mu.Lock()
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defer tb.mu.Unlock()
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tb.woken = true
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tb.notEmpty.Broadcast()
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}
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func (tb *turnBuffer[T]) ClearWakeup() {
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tb.mu.Lock()
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defer tb.mu.Unlock()
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tb.woken = false
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}
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