dynamically build and load adapter libs

this is to support bringup efforts. This change will decouple
the dependencies between GPS HAL and proprietary QMI headers,
so that we can build HAL without any proprietary repos.

Change-Id: I7b836d09f4ac6b1a1bdb38f8d6a2bfb90bb5bf01

loc_api/Android.mk

@@ -13,9 +13,11 @@ GPS_DIR_LIST += $(LOCAL_PATH)/libloc_api/
 
 endif #TARGET_NO_RPC
 
+ifeq (exists, $(shell test -d $(TOP)/vendor/qcom/proprietary/qmi-framework && echo exists))
 #add QMI libraries for QMI targets
 QMI_BOARD_PLATFORM_LIST := msm8960
 QMI_BOARD_PLATFORM_LIST += msm8974
+endif
 
 ifeq ($(call is-board-platform-in-list,$(QMI_BOARD_PLATFORM_LIST)),true)
 GPS_DIR_LIST += $(LOCAL_PATH)/loc_api_v02/

loc_api/libloc_api_50001/Android.mk

@@ -19,7 +19,8 @@ LOCAL_MODULE_TAGS := optional
 LOCAL_SHARED_LIBRARIES := \
     libutils \
     libcutils \
-    libgps.utils
+    libgps.utils \
+    libdl
 
 LOCAL_SRC_FILES += \
     loc_eng_log.cpp \
@@ -79,17 +80,6 @@ LOCAL_SRC_FILES += \
     loc_eng_dmn_conn_glue_msg.c \
     loc_eng_dmn_conn_glue_pipe.c
 
-# if QMI is supported then link to loc_api_v02
-ifeq ($(call is-board-platform-in-list,$(QMI_BOARD_PLATFORM_LIST)),true)
-LOCAL_SHARED_LIBRARIES += libloc_api_v02
-else
-## Check if RPC is not unsupported
-ifneq ($(TARGET_NO_RPC),true)
-LOCAL_SHARED_LIBRARIES += libloc_api-rpc-qc
-endif #TARGET_NO_RPC
-
-endif #is-board-platform-in-list
-
 LOCAL_CFLAGS += \
      -fno-short-enums \
      -D_ANDROID_

loc_api/libloc_api_50001/LocApiAdapter.cpp

@@ -29,6 +29,7 @@
 #define LOG_NDDEBUG 0
 #define LOG_TAG "LocSvc_adapter"
 
+#include <dlfcn.h>
 #include <LocApiAdapter.h>
 #include "loc_eng_msg.h"
 #include "loc_log.h"
@@ -67,6 +68,28 @@ LocApiAdapter::~LocApiAdapter()
     LOC_LOGV("LocApiAdapter deleted");
 }
 
+LocApiAdapter* LocApiAdapter::getLocApiAdapter(LocEng &locEng)
+{
+    void* handle;
+    LocApiAdapter* adapter = NULL;
+
+    handle = dlopen ("libloc_api_v02.so", RTLD_NOW);
+
+    if (!handle) {
+        handle = dlopen ("libloc_api-rpc-qc.so", RTLD_NOW);
+    }
+
+    if (!handle) {
+        adapter = new LocApiAdapter(locEng);
+    } else {
+        getLocApiAdapter_t* getHandle = (getLocApiAdapter_t*)dlsym(handle, "getLocApiAdapter");
+
+        adapter = (*getHandle)(locEng);
+    }
+
+    return adapter;
+}
+
 int LocApiAdapter::hexcode(char *hexstring, int string_size,
                         const char *data, int data_size)
 {

loc_api/libloc_api_50001/LocApiAdapter.h

@@ -115,6 +115,8 @@ public:
     //LocApiAdapter(int q, reportCb_t[LOC_API_ADAPTER_EVENT_MAX] callbackTable);
     virtual ~LocApiAdapter();
 
+    static LocApiAdapter* getLocApiAdapter(LocEng &locEng);
+
     static int hexcode(char *hexstring, int string_size,
                        const char *data, int data_size);
     static int decodeAddress(char *addr_string, int string_size,
@@ -221,7 +223,8 @@ public:
     inline virtual void setInSession(bool inSession) { navigating = inSession; }
 };
 
-LocApiAdapter* getLocApiAdapter(LocEng &locEng);
+extern "C" LocApiAdapter* getLocApiAdapter(LocEng &locEng);
 
+typedef LocApiAdapter* (getLocApiAdapter_t)(LocEng&);
 
 #endif //LOC_API_RPC_ADAPTER_H

loc_api/libloc_api_50001/loc_eng.cpp

@@ -319,7 +319,7 @@ int loc_eng_init(loc_eng_data_s_type &loc_eng_data, LocCallbacks* callbacks,
     LocEng locEngHandle(&loc_eng_data, event, loc_eng_data.acquire_wakelock_cb,
                         loc_eng_data.release_wakelock_cb, loc_eng_msg_sender, loc_external_msg_sender,
                         callbacks->location_ext_parser, callbacks->sv_ext_parser);
-    loc_eng_data.client_handle = getLocApiAdapter(locEngHandle);
+    loc_eng_data.client_handle = LocApiAdapter::getLocApiAdapter(locEngHandle);
 
     int ret_val =-1;
     if (NULL == loc_eng_data.client_handle) {