From b2ef4a806bd5f8f81917a7c93d210cee123191af Mon Sep 17 00:00:00 2001
From: Amaury Pouly <amaury.pouly@gmail.com>
Date: Thu, 18 Sep 2014 19:00:56 +0200
Subject: [PATCH] qeditor: initialise libusb once in a static ctor

Change-Id: Ic93def2b3633c498c9863b0dada3281853be8c6c
Reviewed-on: http://gerrit.rockbox.org/973
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>
---
 utils/regtools/qeditor/backend.cpp | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/utils/regtools/qeditor/backend.cpp b/utils/regtools/qeditor/backend.cpp
index 86e4d60ef9..570ae4d01f 100644
--- a/utils/regtools/qeditor/backend.cpp
+++ b/utils/regtools/qeditor/backend.cpp
@@ -356,7 +356,6 @@ bool HWStubIoBackend::Reload()
  */
 HWStubBackendHelper::HWStubBackendHelper()
 {
-    libusb_init(NULL);
 #ifdef LIBUSB_NO_HOTPLUG
     m_hotplug = false;
 #else
@@ -371,7 +370,7 @@ HWStubBackendHelper::HWStubBackendHelper()
             &HWStubBackendHelper::HotPlugCallback, reinterpret_cast< void* >(this),
             &m_hotplug_handle);
     }
-#endif
+#endif /* LIBUSB_NO_HOTPLUG */
 }
 
 HWStubBackendHelper::~HWStubBackendHelper()
@@ -379,7 +378,7 @@ HWStubBackendHelper::~HWStubBackendHelper()
 #ifndef LIBUSB_NO_HOTPLUG
     if(m_hotplug)
         libusb_hotplug_deregister_callback(NULL, m_hotplug_handle);
-#endif
+#endif /* LIBUSB_NO_HOTPLUG */
 }
 
 QList< HWStubDevice* > HWStubBackendHelper::GetDevList()
@@ -420,14 +419,28 @@ int HWStubBackendHelper::HotPlugCallback(struct libusb_context *ctx, struct libu
     }
     return 0;
 }
-#endif
+#endif /* LIBUSB_NO_HOTPLUG */
 
 bool HWStubBackendHelper::HasHotPlugSupport()
 {
     return m_hotplug;
 }
 
-#endif
+namespace
+{
+class lib_usb_init
+{
+public:
+    lib_usb_init()
+    {
+        libusb_init(NULL);
+    }
+};
+
+lib_usb_init __lib_usb_init;
+}
+
+#endif /* HAVE_HWSTUB */
 
 /**
  * BackendHelper