You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: asyncreader.go
    path of file: ./repos/rclone/fs/asyncreader
    
    the code of the file until where you have to start completion: // Package asyncreader provides an asynchronous reader which reads
// independently of write
package asyncreader

import (
	"context"
	"errors"
	"io"
	"sync"
	"time"

	"github.com/rclone/rclone/fs"
	"github.com/rclone/rclone/lib/pool"
	"github.com/rclone/rclone/lib/readers"
)

const (
	// BufferSize is the default size of the async buffer
	BufferSize           = 1024 * 1024
	softStartInitial     = 4 * 1024
	bufferCacheSize      = 64              // max number of buffers to keep in cache
	bufferCacheFlushTime = 5 * time.Second // flush the cached buffers after this long
)

// ErrorStreamAbandoned is returned
    
func (a *AsyncReader) SkipBytes(skip int) (ok bool) {
	a.mu.Lock()
	defer func() {
		a.mu.Unlock()
		if !ok {
			a.Abandon()
		}
	}()

	if a.err != nil {
		return false
	}
	if skip < 0 {
		// seek backwards if skip is inside current buffer
		if a.cur != nil && a.cur.offset+skip >= 0 {
			a.cur.offset += skip
			return true
		}
		return false
	}
	// early return if skip is past the maximum buffer capacity
	if skip >= (len(a.ready)+1)*BufferSize {
		return false
	}

	refillTokens := 0
	for {
		if a.cur.isEmpty() {
			if a.cur != nil {
				a.putBuffer(a.cur)
				refillTokens++
				a.cur = nil
			}
			select {
			case b, ok := <-a.ready:
				if !ok {
					return false
				}
				a.cur = b
			default:
				return false
			}
		}

		n := len(a.cur.buffer())
		if n > skip {
			n = skip
		}
		a.cur.increment(n)
		skip -= n
		if skip == 0 {
			for ; refillTokens > 0; refillTokens-- {
				a.token <- struct{}{}
			}
			// If at end of buffer, store any error, if present
			if a.cur.isEmpty() && a.cur.err != nil {
				a.err = a.cur.err
			}
			return true
		}
		if a.cur.err != nil {
			a.err = a.cur.err
			return false
		}
	}
}