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, 9 insertions, 0 deletions

diff --git a/drivers/unix/os_unix.cpp b/drivers/unix/os_unix.cpp
index 12e2113364..52a4d538e1 100644
--- a/drivers/unix/os_unix.cpp
+++ b/drivers/unix/os_unix.cpp
@@ -412,6 +412,15 @@ int OS_Unix::get_process_id() const {
 	return getpid();
 }
 
+bool OS_Unix::is_process_running(const ProcessID &p_pid) const {
+	int status = 0;
+	if (waitpid(p_pid, &status, WNOHANG) != 0) {
+		return false;
+	}
+
+	return true;
+}
+
 bool OS_Unix::has_environment(const String &p_var) const {
 	return getenv(p_var.utf8().get_data()) != nullptr;
 }