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package stack
import (
"sync"
)
type Context struct {
mu sync.RWMutex
m map[string]interface{}
}
func NewContext() *Context {
m := make(map[string]interface{})
return &Context{m: m}
}
func (c *Context) Get(key string) interface{} {
if !c.Exists(key) {
return nil
}
c.mu.RLock()
defer c.mu.RUnlock()
return c.m[key]
}
func (c *Context) Put(key string, val interface{}) *Context {
c.mu.Lock()
defer c.mu.Unlock()
c.m[key] = val
return c
}
func (c *Context) Delete(key string) *Context {
c.mu.Lock()
defer c.mu.Unlock()
delete(c.m, key)
return c
}
func (c *Context) Exists(key string) bool {
c.mu.RLock()
defer c.mu.RUnlock()
_, ok := c.m[key]
return ok
}
func (c *Context) copy() *Context {
nc := NewContext()
c.mu.RLock()
defer c.mu.RUnlock()
for k, v := range c.m {
nc.m[k] = v
}
return nc
}
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