1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/browser/extensions/api/api_function.h" 6 7 #include "base/bind.h" 8 #include "chrome/browser/extensions/extension_system.h" 9 #include "chrome/browser/profiles/profile.h" 10 11 using content::BrowserThread; 12 13 namespace extensions { 14 15 ApiFunction::ApiFunction() { 16 } 17 18 ApiFunction::~ApiFunction() { 19 } 20 21 // AsyncApiFunction 22 AsyncApiFunction::AsyncApiFunction() 23 : work_thread_id_(BrowserThread::IO) { 24 } 25 26 AsyncApiFunction::~AsyncApiFunction() { 27 } 28 29 bool AsyncApiFunction::RunImpl() { 30 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 31 32 if (!PrePrepare() || !Prepare()) { 33 return false; 34 } 35 bool rv = BrowserThread::PostTask( 36 work_thread_id_, FROM_HERE, 37 base::Bind(&AsyncApiFunction::WorkOnWorkThread, this)); 38 DCHECK(rv); 39 return true; 40 } 41 42 bool AsyncApiFunction::PrePrepare() { 43 return true; 44 } 45 46 void AsyncApiFunction::Work() { 47 } 48 49 void AsyncApiFunction::AsyncWorkStart() { 50 Work(); 51 AsyncWorkCompleted(); 52 } 53 54 void AsyncApiFunction::AsyncWorkCompleted() { 55 if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) { 56 bool rv = BrowserThread::PostTask( 57 BrowserThread::UI, FROM_HERE, 58 base::Bind(&AsyncApiFunction::RespondOnUIThread, this)); 59 DCHECK(rv); 60 } else { 61 SendResponse(Respond()); 62 } 63 } 64 65 void AsyncApiFunction::WorkOnWorkThread() { 66 DCHECK(BrowserThread::CurrentlyOn(work_thread_id_)); 67 DLOG_IF(ERROR, (work_thread_id_ == BrowserThread::UI)) << 68 "You have specified that AsyncApiFunction::Work() should happen on " 69 "the UI thread. This nullifies the point of this class. Either " 70 "specify a different thread or derive from a different class."; 71 AsyncWorkStart(); 72 } 73 74 void AsyncApiFunction::RespondOnUIThread() { 75 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 76 SendResponse(Respond()); 77 } 78 79 } // namespace extensions 80