Merge pull request #51 from alananisimov/codex/add-olcrtc-cgo

Add cgo ping library entrypoint

cmd/olcrtc-cgo/main.go

@@ -0,0 +1,97 @@
+// Package main exports a small c-shared olcRTC connectivity API for desktop clients.
+package main
+
+import "C"
+import (
+	"github.com/openlibrecommunity/olcrtc/mobile"
+)
+
+const errorResult = C.longlong(-1)
+
+// Ping starts a short-lived olcRTC client, waits for its SOCKS listener,
+// performs an HTTP ping through it, and returns latency in milliseconds.
+// It returns -1 when arguments are invalid, startup fails, or the ping fails.
+//
+//export Ping
+func Ping(
+	carrierName *C.char,
+	transportName *C.char,
+	roomID *C.char,
+	clientID *C.char,
+	keyHex *C.char,
+	socksPort C.longlong,
+	timeoutMillis C.longlong,
+	pingURL *C.char,
+	vp8FPS C.longlong,
+	vp8BatchSize C.longlong,
+) C.longlong {
+	result, err := mobile.Ping(
+		goString(carrierName),
+		goString(transportName),
+		goString(roomID),
+		goString(clientID),
+		goString(keyHex),
+		goInt(socksPort),
+		goInt(timeoutMillis),
+		goString(pingURL),
+		goInt(vp8FPS),
+		goInt(vp8BatchSize),
+	)
+	if err != nil {
+		return errorResult
+	}
+	return C.longlong(result)
+}
+
+// Check starts a short-lived olcRTC client and returns elapsed milliseconds
+// once the transport and local SOCKS listener are ready. It returns -1 on error.
+//
+//export Check
+func Check(
+	carrierName *C.char,
+	transportName *C.char,
+	roomID *C.char,
+	clientID *C.char,
+	keyHex *C.char,
+	socksPort C.longlong,
+	timeoutMillis C.longlong,
+	vp8FPS C.longlong,
+	vp8BatchSize C.longlong,
+) C.longlong {
+	result, err := mobile.Check(
+		goString(carrierName),
+		goString(transportName),
+		goString(roomID),
+		goString(clientID),
+		goString(keyHex),
+		goInt(socksPort),
+		goInt(timeoutMillis),
+		goInt(vp8FPS),
+		goInt(vp8BatchSize),
+	)
+	if err != nil {
+		return errorResult
+	}
+	return C.longlong(result)
+}
+
+func goString(value *C.char) string {
+	if value == nil {
+		return ""
+	}
+	return C.GoString(value)
+}
+
+func goInt(value C.longlong) int {
+	const maxInt = int(^uint(0) >> 1)
+	const minInt = -maxInt - 1
+	if value > C.longlong(maxInt) {
+		return maxInt
+	}
+	if value < C.longlong(minInt) {
+		return minInt
+	}
+	return int(value)
+}
+
+func main() {}