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      1 /* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
      2  *
      3  * Redistribution and use in source and binary forms, with or without
      4  * modification, are permitted provided that the following conditions are
      5  * met:
      6  *     * Redistributions of source code must retain the above copyright
      7  *       notice, this list of conditions and the following disclaimer.
      8  *     * Redistributions in binary form must reproduce the above
      9  *       copyright notice, this list of conditions and the following
     10  *       disclaimer in the documentation and/or other materials provided
     11  *       with the distribution.
     12  *     * Neither the name of The Linux Foundation, nor the names of its
     13  *       contributors may be used to endorse or promote products derived
     14  *       from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
     23  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     24  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     25  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
     26  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  */
     29 #define LOG_NDDEBUG 0
     30 #define LOG_TAG "LocSvc_CtxBase"
     31 
     32 #include <dlfcn.h>
     33 #include <cutils/sched_policy.h>
     34 #include <unistd.h>
     35 #include <ContextBase.h>
     36 #include <msg_q.h>
     37 #include <loc_target.h>
     38 #include <log_util.h>
     39 #include <loc_log.h>
     40 
     41 namespace loc_core {
     42 
     43 
     44 IzatProxyBase* ContextBase::getIzatProxy(const char* libName)
     45 {
     46     IzatProxyBase* proxy = NULL;
     47     void* lib = dlopen(libName, RTLD_NOW);
     48 
     49     if ((void*)NULL != lib) {
     50         getIzatProxy_t* getter = (getIzatProxy_t*)dlsym(lib, "getIzatProxy");
     51         if (NULL != getter) {
     52             proxy = (*getter)();
     53         }
     54     }
     55     if (NULL == proxy) {
     56         proxy = new IzatProxyBase();
     57     }
     58     return proxy;
     59 }
     60 
     61 LocApiBase* ContextBase::createLocApi(LOC_API_ADAPTER_EVENT_MASK_T exMask)
     62 {
     63     LocApiBase* locApi = NULL;
     64 
     65     // first if can not be MPQ
     66     if (TARGET_MPQ != get_target()) {
     67         if (NULL == (locApi = mIzatProxy->getLocApi(mMsgTask, exMask))) {
     68             void *handle = NULL;
     69             //try to see if LocApiV02 is present
     70             if((handle = dlopen("libloc_api_v02.so", RTLD_NOW)) != NULL) {
     71                 LOC_LOGD("%s:%d]: libloc_api_v02.so is present", __func__, __LINE__);
     72                 getLocApi_t* getter = (getLocApi_t*)dlsym(handle, "getLocApi");
     73                 if(getter != NULL) {
     74                     LOC_LOGD("%s:%d]: getter is not NULL for LocApiV02", __func__, __LINE__);
     75                     locApi = (*getter)(mMsgTask,exMask);
     76                 }
     77             }
     78             // only RPC is the option now
     79             else {
     80                 LOC_LOGD("%s:%d]: libloc_api_v02.so is NOT present. Trying RPC",
     81                          __func__, __LINE__);
     82                 handle = dlopen("libloc_api-rpc-qc.so", RTLD_NOW);
     83                 if (NULL != handle) {
     84                     getLocApi_t* getter = (getLocApi_t*)dlsym(handle, "getLocApi");
     85                     if (NULL != getter) {
     86                         LOC_LOGD("%s:%d]: getter is not NULL in RPC", __func__, __LINE__);
     87                         locApi = (*getter)(mMsgTask, exMask);
     88                     }
     89                 }
     90             }
     91         }
     92     }
     93 
     94     // locApi could still be NULL at this time
     95     // we would then create a dummy one
     96     if (NULL == locApi) {
     97         locApi = new LocApiBase(mMsgTask, exMask);
     98     }
     99 
    100     return locApi;
    101 }
    102 
    103 ContextBase::ContextBase(const MsgTask* msgTask,
    104                          LOC_API_ADAPTER_EVENT_MASK_T exMask,
    105                          const char* libName) :
    106     mIzatProxy(getIzatProxy(libName)),
    107     mMsgTask(msgTask),
    108     mLocApi(createLocApi(exMask))
    109 {
    110 }
    111 
    112 }
    113