enhance ulp handshake

send ULP the position mode if it is valid when ULP handle
is first received. This helps handling a race condition
where ULP handshake happens when a GPS session is about
to happen or already happening.

Change-Id: I029e5c3bbb9d8e89b220ca44e9704b5a1d1451ff
CRs-Fixed: 554340

core/gps_extended_c.h

@@ -161,7 +161,8 @@ typedef enum loc_server_type {
 } LocServerType;
 
 typedef enum loc_position_mode_type {
-    LOC_POSITION_MODE_STANDALONE,
+    LOC_POSITION_MODE_INVALID = -1,
+    LOC_POSITION_MODE_STANDALONE = 0,
     LOC_POSITION_MODE_MS_BASED,
     LOC_POSITION_MODE_MS_ASSISTED,
     LOC_POSITION_MODE_RESERVED_1,
@@ -169,6 +170,7 @@ typedef enum loc_position_mode_type {
     LOC_POSITION_MODE_RESERVED_3,
     LOC_POSITION_MODE_RESERVED_4,
     LOC_POSITION_MODE_RESERVED_5
+
 } LocPositionMode;
 
 #define MIN_POSSIBLE_FIX_INTERVAL 1000 /* msec */

loc_api/libloc_api_50001/LocEngAdapter.cpp

@@ -78,6 +78,7 @@ LocEngAdapter::LocEngAdapter(LOC_API_ADAPTER_EVENT_MASK_T mask,
     mAgpsEnabled(false)
 {
     memset(&mFixCriteria, 0, sizeof(mFixCriteria));
+    mFixCriteria.mode = LOC_POSITION_MODE_INVALID;
     LOC_LOGD("LocEngAdapter created");
 }
 
@@ -101,6 +102,12 @@ void LocEngAdapter::setUlpProxy(UlpProxyBase* ulp)
         ulp = new UlpProxyBase();
     }
     mUlp = ulp;
+
+    if (LOC_POSITION_MODE_INVALID != mFixCriteria.mode) {
+        // need to send this mode and start msg to ULP
+        mUlp->sendFixMode(mFixCriteria);
+        mUlp->sendStartFix();
+    }
 }
 
 void LocInternalAdapter::reportPosition(UlpLocation &location,
@@ -157,6 +164,15 @@ void LocEngAdapter::reportSv(GpsSvStatus &svStatus,
     }
 }
 
+void LocEngAdapter::setInSession(bool inSession)
+{
+    mNavigating = inSession;
+    mLocApi->setInSession(inSession);
+    if (!mNavigating) {
+        mFixCriteria.mode = LOC_POSITION_MODE_INVALID;
+    }
+}
+
 inline
 void LocEngAdapter::reportStatus(GpsStatusValue status)
 {

loc_api/libloc_api_50001/LocEngAdapter.h

@@ -264,8 +264,7 @@ public:
     {return mFixCriteria;}
     inline virtual bool isInSession()
     { return mNavigating; }
-    inline void setInSession(bool inSession)
-    { mNavigating = inSession; mLocApi->setInSession(inSession); }
+    void setInSession(bool inSession);
 
     /*Values for lock
       1 = Do not lock any position sessions