Add OS::is_process_running function.

Adds the is_process_running function to the native OS class and exposes it to script.

This is implemented on Windows and Unix platforms. A stub is provided for other platforms that do not support this function.

Documentation is updated to reflect new API function.

1 files changed, 19 insertions, 0 deletions

diff --git a/platform/windows/os_windows.cpp b/platform/windows/os_windows.cpp
index 6b4e455197..d43ab47004 100644
--- a/platform/windows/os_windows.cpp
+++ b/platform/windows/os_windows.cpp
@@ -517,6 +517,25 @@ int OS_Windows::get_process_id() const {
 	return _getpid();
 }
 
+bool OS_Windows::is_process_running(const ProcessID &p_pid) const {
+	if (!process_map->has(p_pid)) {
+		return false;
+	}
+
+	const PROCESS_INFORMATION &pi = (*process_map)[p_pid].pi;
+
+	DWORD dw_exit_code = 0;
+	if (!GetExitCodeProcess(pi.hProcess, &dw_exit_code)) {
+		return false;
+	}
+
+	if (dw_exit_code != STILL_ACTIVE) {
+		return false;
+	}
+
+	return true;
+}
+
 Error OS_Windows::set_cwd(const String &p_cwd) {
 	if (_wchdir((LPCWSTR)(p_cwd.utf16().get_data())) != 0) {
 		return ERR_CANT_OPEN;