fix: rename file according to Summary

synchronization/read-write-lock.md

@@ -1,110 +0,0 @@
-# Read/Write Lock Pattern
-Allows parallel read access, but only exclusive access on write operations to a resource
-
-## Implementation
-
-```go
-package router
-
-import (
-	"sync"
-)
-
-type Socket  string
-type Peer interface {
-	socket Socket
-	connection net.Conn
-}
-
-func (p *Peer) Socket() Socket {
-	return p.socket
-}
-
-// Router hash table to associate Socket with Peers.
-// Unstructured mesh architecture
-// eg. {127.0.0.1:4000: Peer}
-type Router struct {
-	sync.RWMutex
-	table map[Socket]Peer
-}
-
-
-// Return connection interface based on socket
-func (r *Router) Query(socket Socket) *Peer {
-	// Mutex for reading topics.
-	// Do not write while topics are read.
-	// Write Lock can’t be acquired until all Read Locks are released.
-	r.RWMutex.RLock()
-	defer r.RWMutex.RUnlock()
-
-	if peer, ok := r.table[socket]; ok {
-		return peer
-	}
-
-	return nil
-}
-
-// Add create new socket connection association
-func (r *Router) Add(peer *Peer) {
-	// Lock write table while add operation
-	// A blocked Lock call excludes new readers from acquiring the lock.
-	r.RWMutex.Lock()
-	defer r.RWMutex.Unlock()
-	r.table[peer.Socket()] = peer
-}
-
-// Delete removes a connection from router
-func (r *Router) Delete(peer *Peer) {
-	// Lock write table while delete operation
-	// A blocked Lock call excludes new readers from acquiring the lock.
-	r.RWMutex.Lock()
-	defer r.RWMutex.Unlock()
-	delete(r.table, peer.Socket())
-}
-```
-
-## Usage
-### Syncronize routing peers from incoming connections
-
-```go
-
-// New router 
-router:= &Router{
-	table: make(map[Socket]Peer)
-}
-
-// !Important: 
-// 1 - Write Lock can’t be acquired until all Read Locks are released.
-// 2 - A blocked Lock call excludes new readers from acquiring the lock.
-
-// Writing operation
-go func(r *Router){
-	for {
-		// this will be running waiting for new connections
-		/// .. some code here
-		conn, err := listener.Accept()
-		// eg. 192.168.1.1:8080
-		remote := connection.RemoteAddr().String()
-		socket := Socket(address)
-		// New peer
-		peer := &Peer{
-			socket: socket,
-			connection: conn
-		}
-		// Here we need a write lock to avoid race condition
-		r.Add(peer)
-	}
-}(router)
-
-// Reading operation
-go func(r *Router){
-	// ...some logic here
-	// reading operation 1
-	connection := r.Query("192.168.1.1:8080")
-	//... more code here 
-	// reading operation 2
-	otherQuery:= r.Query("192.168.1.1:8081")
-	// read locks are like counters.. until counter = 0 Write can be acquired
-}(router)
-
-```