feat: Waku v2 bridge

Issue #12610

vendor/github.com/zenthangplus/goccm/README.md

@@ -0,0 +1,76 @@
+# Golang Concurrency Manager [![Build Status](https://travis-ci.com/zenthangplus/goccm.svg?branch=master)](https://travis-ci.com/zenthangplus/goccm)
+
+Golang Concurrency Manager package limits the number of goroutines that are allowed to run concurrently.
+
+### Installation
+
+Run the following command to install this package:
+
+```
+$ go get -u github.com/zenthangplus/goccm
+```
+
+### Example
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/zenthangplus/goccm"
+    "time"
+)
+
+func main()  {
+    // Limit 3 goroutines to run concurrently.
+    c := goccm.New(3)
+    
+    for i := 1; i <= 10; i++ {
+    	
+        // This function has to call before any goroutine
+        c.Wait()
+        
+        go func(i int) {
+            fmt.Printf("Job %d is running\n", i)
+            time.Sleep(2 * time.Second)
+            
+            // This function has to when a goroutine has finished
+            // Or you can use `defer c.Done()` at the top of goroutine.
+            c.Done()
+        }(i)
+    }
+    
+    // This function has to call to ensure all goroutines have finished 
+    // after close the main program.
+    c.WaitAllDone()
+}
+```
+
+### List of supported functions
+
+```go
+package main
+
+import "github.com/zenthangplus/goccm"
+
+func main() {
+    // Create the concurrency manager
+    // The first argument is the maximum number of goroutines to run concurrently.
+    c := goccm.New(10)
+    
+    // Wait until a slot is available for the new goroutine.
+    c.Wait()
+    
+    // Mark a goroutine as finished
+    c.Done()
+    
+    // Wait for all goroutines are done
+    c.WaitAllDone()
+    
+    // Close the manager manually
+    c.Close()
+    
+    // Returns the number of goroutines which are running
+    c.RunningCount()
+}
+```