[vdagent-win PATCH v5 3/6] Introduce an helper to close VirtIo device

[Frediano Ziglio <fziglio@xxxxxxxxxx>]

Do not assume we allocated the handle doing the cleanup.
This utility will be reused in next patch.

Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
Acked-by: Christophe de Dinechin <dinechin@xxxxxxxxxx>
---
 vdagent/vdagent.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/vdagent/vdagent.cpp b/vdagent/vdagent.cpp
index 010e73b..d603dda 100644
--- a/vdagent/vdagent.cpp
+++ b/vdagent/vdagent.cpp
@@ -110,6 +110,7 @@ private:
     bool write_message(uint32_t type, uint32_t size, void* data);
     bool write_clipboard(VDAgentMessage* msg, uint32_t size);
     bool init_vio_serial();
+    void close_vio_serial();
     bool send_input();
     void set_display_depth(uint32_t depth);
     void load_display_setting();
@@ -340,7 +341,7 @@ bool VDAgent::run()
 
 void VDAgent::cleanup()
 {
-    CloseHandle(_vio_serial);
+    close_vio_serial();
 }
 
 void VDAgent::set_control_event(control_command_t control_command)
@@ -1224,6 +1225,14 @@ bool VDAgent::init_vio_serial()
     return true;
 }
 
+void VDAgent::close_vio_serial()
+{
+    if (_vio_serial != INVALID_HANDLE_VALUE) {
+        CloseHandle(_vio_serial);
+        _vio_serial = INVALID_HANDLE_VALUE;
+    }
+}
+
 void VDAgent::dispatch_message(VDAgentMessage* msg, uint32_t port)
 {
     bool res = true;
-- 
2.17.1

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