From 12025d4ffa5ace1e2eff3015112997287f9bfeaa Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 11 Jul 2014 17:03:55 +0200
Subject: [PATCH] possible fix for win SystemExec::wait()

if it does not help, use CREATE_NO_WINDOW and/or peek/pump messages :(
---
 libs/pbd/system_exec.cc | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/libs/pbd/system_exec.cc b/libs/pbd/system_exec.cc
index 01c46aa9eb..123fb909ad 100644
--- a/libs/pbd/system_exec.cc
+++ b/libs/pbd/system_exec.cc
@@ -413,8 +413,7 @@ int
 SystemExec::wait (int options)
 {
 	while (is_running()) {
-		WaitForSingleObject(pid->hProcess, INFINITE);
-		Sleep(20);
+		WaitForSingleObject(pid->hProcess, 40);
 	}
 	return 0;
 }
@@ -422,7 +421,12 @@ SystemExec::wait (int options)
 bool
 SystemExec::is_running ()
 {
-	return pid?true:false;
+	if (!pid) return false;
+	DWORD exit_code;
+	if (GetExitCodeProcess(pid->hProcess, &exit_code)) {
+		if (exit_code == STILL_ACTIVE) return true;
+	}
+	return false;
 }
 
 int