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      1 /*
      2  * Copyright 2007, The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "FileSystemClient.h"
     28 #include "JavaSharedClient.h"
     29 #include "TimerClient.h"
     30 #include "SkDeque.h"
     31 #include "SkThread.h"
     32 
     33 namespace android {
     34     TimerClient* JavaSharedClient::GetTimerClient()
     35     {
     36         return gTimerClient;
     37     }
     38 
     39     CookieClient* JavaSharedClient::GetCookieClient()
     40     {
     41         return gCookieClient;
     42     }
     43 
     44     PluginClient* JavaSharedClient::GetPluginClient()
     45     {
     46         return gPluginClient;
     47     }
     48 
     49     KeyGeneratorClient* JavaSharedClient::GetKeyGeneratorClient()
     50     {
     51         return gKeyGeneratorClient;
     52     }
     53 
     54     FileSystemClient* JavaSharedClient::GetFileSystemClient()
     55     {
     56         return gFileSystemClient;
     57     }
     58 
     59     void JavaSharedClient::SetTimerClient(TimerClient* client)
     60     {
     61         gTimerClient = client;
     62     }
     63 
     64     void JavaSharedClient::SetCookieClient(CookieClient* client)
     65     {
     66         gCookieClient = client;
     67     }
     68 
     69     void JavaSharedClient::SetPluginClient(PluginClient* client)
     70     {
     71         gPluginClient = client;
     72     }
     73 
     74     void JavaSharedClient::SetKeyGeneratorClient(KeyGeneratorClient* client)
     75     {
     76         gKeyGeneratorClient = client;
     77     }
     78 
     79     void JavaSharedClient::SetFileSystemClient(FileSystemClient* client)
     80     {
     81         gFileSystemClient = client;
     82     }
     83 
     84     TimerClient*    JavaSharedClient::gTimerClient = NULL;
     85     CookieClient*   JavaSharedClient::gCookieClient = NULL;
     86     PluginClient*   JavaSharedClient::gPluginClient = NULL;
     87     KeyGeneratorClient* JavaSharedClient::gKeyGeneratorClient = NULL;
     88     FileSystemClient* JavaSharedClient::gFileSystemClient = NULL;
     89 
     90     ///////////////////////////////////////////////////////////////////////////
     91 
     92     struct FuncPtrRec {
     93         void (*fProc)(void* payload);
     94         void* fPayload;
     95     };
     96 
     97     static SkMutex gFuncPtrQMutex;
     98     static SkDeque gFuncPtrQ(sizeof(FuncPtrRec));
     99 
    100     void JavaSharedClient::EnqueueFunctionPtr(void (*proc)(void* payload),
    101                                               void* payload)
    102     {
    103         gFuncPtrQMutex.acquire();
    104 
    105         FuncPtrRec* rec = (FuncPtrRec*)gFuncPtrQ.push_back();
    106         rec->fProc = proc;
    107         rec->fPayload = payload;
    108 
    109         gFuncPtrQMutex.release();
    110 
    111         gTimerClient->signalServiceFuncPtrQueue();
    112     }
    113 
    114     void JavaSharedClient::ServiceFunctionPtrQueue()
    115     {
    116         // Don't let execution block the WebViewCore thread for too long.
    117         void (*proc)(void*) = 0;
    118         void* payload = 0;
    119         const FuncPtrRec* rec;
    120 
    121         // we have to copy the proc/payload (if present). we do this so we
    122         // don't call the proc inside the mutex (possible deadlock!)
    123         gFuncPtrQMutex.acquire();
    124         rec = (const FuncPtrRec*)gFuncPtrQ.front();
    125         if (rec) {
    126             proc = rec->fProc;
    127             payload = rec->fPayload;
    128             gFuncPtrQ.pop_front();
    129         }
    130         bool scheduleAdditionalCall = (gFuncPtrQ.count() > 0);
    131         gFuncPtrQMutex.release();
    132 
    133         if (rec)
    134             proc(payload);
    135         if (scheduleAdditionalCall)
    136             gTimerClient->signalServiceFuncPtrQueue();
    137     }
    138 }
    139