getpid

src/connection.h

@@ -5,6 +5,9 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+// not really connectiony, but need per-platform
+int GetProcessId();
+
 struct BaseConnection {
     static BaseConnection* Create();
     static void Destroy(BaseConnection*&);

src/connection_unix.cpp

@@ -1,5 +1,13 @@
 #include "connection.h"
 
+#include <sys/types.h>
+#include <unistd.h>
+
+int GetProcessId()
+{
+    return ::getpid();
+}
+
 const int RpcVersion = 1;
 const int NumFrames = 4;
 

src/connection_win.cpp

@@ -6,6 +6,11 @@
 #define NOIME
 #include <windows.h>
 
+int GetProcessId()
+{
+    return ::GetCurrentProcessId();
+}
+
 struct BaseConnectionWin : public BaseConnection {
     HANDLE pipe{INVALID_HANDLE_VALUE};
 };