add cross-platform interrupt signal utility

Author: dogancanbakir

process/interrupt_unix.go

@@ -0,0 +1,13 @@
+//go:build !windows
+
+package process
+
+import "os"
+
+// SendInterrupt sends an interrupt signal to the current process.
+// On Unix systems, this sends os.Interrupt (SIGINT).
+func SendInterrupt() {
+	if p, err := os.FindProcess(os.Getpid()); err == nil {
+		_ = p.Signal(os.Interrupt)
+	}
+}

process/interrupt_windows.go

@@ -0,0 +1,18 @@
+//go:build windows
+
+package process
+
+import "syscall"
+
+var (
+	kernel32                     = syscall.NewLazyDLL("kernel32.dll")
+	procGenerateConsoleCtrlEvent = kernel32.NewProc("GenerateConsoleCtrlEvent")
+)
+
+// SendInterrupt sends an interrupt signal to the current process.
+// On Windows, this uses GenerateConsoleCtrlEvent with CTRL_BREAK_EVENT
+// because Go's p.Signal(os.Interrupt) is not implemented on Windows.
+func SendInterrupt() {
+	// CTRL_BREAK_EVENT = 1
+	procGenerateConsoleCtrlEvent.Call(1, 0)
+}