// Package app holds application-global state to make it accessible // by other packages in the application. // // This package differs from config in that the things in app aren't // really related to server configuration. package app import ( "errors" "runtime" "strconv" "strings" "sync" "github.com/mholt/caddy/server" ) const ( // Program name Name = "Caddy" // Program version Version = "0.6.0" ) var ( // Servers is a list of all the currently-listening servers Servers []*server.Server // This mutex protects the Servers slice during changes ServersMutex sync.Mutex // Waiting on Wg will block until all listeners have shut down. Wg sync.WaitGroup // Whether HTTP2 is enabled or not Http2 bool // TODO: temporary flag until http2 is standard // Quiet mode hides non-error initialization output Quiet bool ) // SetCPU parses string cpu and sets GOMAXPROCS // according to its value. It accepts either // a number (e.g. 3) or a percent (e.g. 50%). func SetCPU(cpu string) error { var numCPU int availCPU := runtime.NumCPU() if strings.HasSuffix(cpu, "%") { // Percent var percent float32 pctStr := cpu[:len(cpu)-1] pctInt, err := strconv.Atoi(pctStr) if err != nil || pctInt < 1 || pctInt > 100 { return errors.New("Invalid CPU value: percentage must be between 1-100") } percent = float32(pctInt) / 100 numCPU = int(float32(availCPU) * percent) } else { // Number num, err := strconv.Atoi(cpu) if err != nil || num < 1 { return errors.New("Invalid CPU value: provide a number or percent greater than 0") } numCPU = num } if numCPU > availCPU { numCPU = availCPU } runtime.GOMAXPROCS(numCPU) return nil }