[vdagent-win v1] vdagent-win: start vdagent with lock info from session

[Victor Toso <victortoso@xxxxxxxxxx>]

From: Frediano Ziglio <fziglio@xxxxxxxxxx>

Would be something like this (not tested)
---
 common/vdcommon.h       |  1 +
 vdagent/vdagent.cpp     | 12 ++++++++++++
 vdservice/vdservice.cpp |  7 +++++++
 3 files changed, 20 insertions(+)

diff --git a/common/vdcommon.h b/common/vdcommon.h
index c1920e9..6b53327 100644
--- a/common/vdcommon.h
+++ b/common/vdcommon.h
@@ -66,6 +66,7 @@ typedef Mutex mutex_t;
 
 #define VD_AGENT_REGISTRY_KEY "SOFTWARE\\Red Hat\\Spice\\vdagent\\"
 #define VD_AGENT_STOP_EVENT   TEXT("Global\\vdagent_stop_event")
+#define VD_AGENT_SESSION_UNLOCKED_EVENT TEXT("Global\\vdagent_session_unlocked_event")
 
 #if defined __GNUC__
 #define ALIGN_GCC __attribute__ ((packed))
diff --git a/vdagent/vdagent.cpp b/vdagent/vdagent.cpp
index e3ba14b..0396a11 100644
--- a/vdagent/vdagent.cpp
+++ b/vdagent/vdagent.cpp
@@ -236,6 +236,18 @@ VDAgent::VDAgent()
     ZeroMemory(&_write_overlapped, sizeof(_write_overlapped));
     ZeroMemory(_read_buf, sizeof(_read_buf));
 
+    HANDLE _session_unlocked_event = OpenEvent(SYNCHRONIZE, FALSE, VD_AGENT_SESSION_UNLOCKED_EVENT);
+    switch (WaitForSingleObject(_session_unlocked_event, 0)) {
+    case WAIT_OBJECT_0:
+        _session_is_locked = false;
+        break;
+    default:
+    case WAIT_TIMEOUT:
+        _session_is_locked = true;
+        break;
+    }
+    CloseHandle(_session_unlocked_event);
+
     _singleton = this;
 }
 
diff --git a/vdservice/vdservice.cpp b/vdservice/vdservice.cpp
index 1892b72..65adf72 100644
--- a/vdservice/vdservice.cpp
+++ b/vdservice/vdservice.cpp
@@ -91,6 +91,7 @@ private:
     PROCESS_INFORMATION _agent_proc_info;
     HANDLE _control_event;
     HANDLE _agent_stop_event;
+    HANDLE _session_unlocked_event;
     HANDLE* _events;
     TCHAR _agent_path[MAX_PATH];
     VDControlQueue _control_queue;
@@ -123,11 +124,13 @@ VDService::VDService()
     _system_version = supported_system_version();
     _control_event = CreateEvent(NULL, FALSE, FALSE, NULL);
     _agent_stop_event = CreateEvent(NULL, FALSE, FALSE, VD_AGENT_STOP_EVENT);
+    _session_unlocked_event = CreateEvent(NULL, TRUE, TRUE, VD_AGENT_SESSION_UNLOCKED_EVENT);
     _agent_path[0] = wchar_t('\0');
 }
 
 VDService::~VDService()
 {
+    CloseHandle(_session_unlocked_event);
     CloseHandle(_agent_stop_event);
     CloseHandle(_control_event);
     delete[] _events;
@@ -290,6 +293,10 @@ DWORD WINAPI VDService::control_handler(DWORD control, DWORD event_type, LPVOID
         if (event_type == WTS_CONSOLE_CONNECT) {
             s->_session_id = session_id;
             s->set_control_event(VD_CONTROL_RESTART_AGENT);
+        } else if (event_type == WTS_SESSION_LOCK) {
+            ResetEvent(s->_session_unlocked_event);
+        } else if (event_type == WTS_SESSION_UNLOCK) {
+            SetEvent(s->_session_unlocked_event);
         }
         break;
     }
-- 
2.9.3

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