Initial implementation of GoPool

- Added a basic description to the README.md file.
- Created a new go.mod file with the module name and Go version.
- Implemented the basic structure of the Pool in pool.go.
- Implemented the basic structure of the Worker in worker.go.

Signed-off-by: Daniel Hu <tao.hu@merico.dev>

README.md

@@ -1 +1,3 @@
-# gopool
+# GoPool
+
+GoPool is a high-performance, feature-rich, and easy-to-use Golang thread pool.

go.mod

@@ -0,0 +1,3 @@
+module github.com/devchat-ai/gopool
+
+go 1.20

pool.go

@@ -0,0 +1,32 @@
+package gopool
+
+import (
+	"sync"
+)
+
+type Pool struct {
+	// capacity represents the maximum number of workers the pool can have
+	capacity int
+	// running represents the number of workers that are currently running
+	running int
+	// workers represents a pool of workers that are executing tasks
+	workers WorkerStack
+	// lock represents a mutex to protect the workers slice
+	lock sync.Mutex
+}
+
+func (p *Pool) Submit(task Task) {
+	// TODO
+}
+
+func (p *Pool) Running() int {
+	return p.running
+}
+
+func (p *Pool) Cap() int {
+	return p.capacity
+}
+
+func (p *Pool) Release() {
+	// TODO
+}

worker.go

@@ -0,0 +1,26 @@
+package gopool
+
+import (
+	"time"
+)
+
+type Task func()
+
+type Worker struct {
+	// pool represents a reference to the pool that owns this worker
+	pool *Pool
+	// task represents the task that the worker will execute
+	task chan Task
+	// lastUsedTime represents the last time the worker was used
+	lastUsedTime time.Time
+}
+
+type WorkerStack interface {
+	Push(w *Worker)
+	Pop() *Worker
+	Len() int
+}
+
+type workerStack struct {
+	workers []*Worker
+}