From bbc0c8e2a783aa498732d3d5fc1b297c4e37c5a2 Mon Sep 17 00:00:00 2001
From: vCaesar <vzvway@gmail.com>
Date: Wed, 18 Jan 2017 20:34:35 +0800
Subject: [PATCH] Add Getpid

---
 robotgo.go        |  6 ++++++
 window/goWindow.h |  5 +++++
 window/window.h   | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+)

diff --git a/robotgo.go b/robotgo.go
index 9367c89..96cdf7b 100644
--- a/robotgo.go
+++ b/robotgo.go
@@ -777,3 +777,9 @@ func GetTitle() string {
 	// Println("title...", gtittle)
 	return gtittle
 }
+
+//GetPID Get the process id
+func GetPID() int {
+	pid := C.aGetPID()
+	return int(pid)
+}
diff --git a/window/goWindow.h b/window/goWindow.h
index fe0617b..4a7d3ca 100644
--- a/window/goWindow.h
+++ b/window/goWindow.h
@@ -57,3 +57,8 @@ char* aGetTitle(){
 	// printf("title::::%s\n",title );
 	return title;
 }
+
+int32 aGetPID(void){
+	int pid=WGetPID();
+	return pid;
+}
diff --git a/window/window.h b/window/window.h
index 3e9da69..0c082b2 100644
--- a/window/window.h
+++ b/window/window.h
@@ -867,3 +867,39 @@ char *GetTitle(){
 #endif
 }
 
+int32 WGetPID(void){
+	// Check window validity
+	if (!IsValid()) return 0;
+
+#if defined(IS_MACOSX)
+
+	pid_t pid = 0;
+	// Attempt to retrieve the window pid
+	if (AXUIElementGetPid(mData.AxID, &pid)
+			== kAXErrorSuccess) return pid;
+
+	return 0;
+
+#elif defined(USE_X11)
+
+	// Ignore X errors
+	XDismissErrors();
+
+	// Get the window PID
+	long* result = (long*)
+		GetWindowProperty(mData, WM_PID,NULL);
+
+	// Check result and convert it
+	if (result == NULL) return 0;
+	int32 pid = (int32) *result;
+	XFree (result); return pid;
+
+#elif defined(IS_WINDOWS)
+
+	DWORD  id = 0;
+	GetWindowThreadProcessId (mData.HWnd, &id);
+	return id;
+
+#endif
+}
+