Make it portable

include/ignition/transport/Helpers.hh

@@ -63,6 +63,10 @@ namespace ignition
         const std::string &_orig,
         char _delim);
 
+    /// \brief Portable function to get the id of the current process.
+    /// \returns id of current process
+    unsigned int IGNITION_TRANSPORT_VISIBLE getProcessId();
+
     // Use safer functions on Windows
     #ifdef _MSC_VER
       #define ign_strcat strcat_s

src/Helpers.cc

@@ -18,6 +18,12 @@
 #include <cstdlib>
 #include <string>
 
+#ifdef _WIN32
+#include <processthreadsapi.h>
+#else
+#include <unistd.h>
+#endif
+
 #include "ignition/transport/Helpers.hh"
 
 namespace ignition
@@ -59,6 +65,16 @@ namespace ignition
       pieces.push_back(_orig.substr(pos1, _orig.size()-pos1));
       return pieces;
     }
+
+    //////////////////////////////////////////////////
+    unsigned int getProcessId()
+    {
+#ifdef _WIN32
+      return ::GetCurrentProcessId();
+#else
+      return ::getpid();
+#endif
+    }
     }
   }
 }

src/NodeShared.cc

@@ -23,8 +23,6 @@
 #pragma warning(pop)
 #endif
 
-#include <unistd.h>
-
 #include <chrono>
 #include <cstring>
 #include <iostream>
@@ -176,10 +174,10 @@ NodeShared *NodeShared::Instance()
   // is not shared between different processes.
 
   static std::shared_mutex mutex;
-  static std::unordered_map<pid_t, NodeShared*> nodeSharedMap;
+  static std::unordered_map<unsigned int, NodeShared*> nodeSharedMap;
 
-  // Get current process PID.
-  auto pid = ::getpid();
+  // Get current process ID.
+  auto pid = getProcessId();
 
   // Check if there's already a NodeShared instance for this process.
   // Use a shared_lock so multiple threads can read simultaneously.