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| 1 // Copyright (c) 2011 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 "net/dns/single_request_host_resolver.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/bind_helpers.h" | |
| 9 #include "base/compiler_specific.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "base/profiler/scoped_tracker.h" | |
| 12 #include "net/base/net_errors.h" | |
| 13 | |
| 14 namespace net { | |
| 15 | |
| 16 SingleRequestHostResolver::SingleRequestHostResolver(HostResolver* resolver) | |
| 17 : resolver_(resolver), | |
| 18 cur_request_(NULL), | |
| 19 callback_( | |
| 20 base::Bind(&SingleRequestHostResolver::OnResolveCompletion, | |
| 21 base::Unretained(this))) { | |
| 22 DCHECK(resolver_ != NULL); | |
| 23 } | |
| 24 | |
| 25 SingleRequestHostResolver::~SingleRequestHostResolver() { | |
| 26 Cancel(); | |
| 27 } | |
| 28 | |
| 29 int SingleRequestHostResolver::Resolve(const HostResolver::RequestInfo& info, | |
| 30 RequestPriority priority, | |
| 31 AddressList* addresses, | |
| 32 const CompletionCallback& callback, | |
| 33 const BoundNetLog& net_log) { | |
| 34 DCHECK(addresses); | |
| 35 DCHECK_EQ(false, callback.is_null()); | |
| 36 DCHECK(cur_request_callback_.is_null()) << "resolver already in use"; | |
| 37 | |
| 38 HostResolver::RequestHandle request = NULL; | |
| 39 | |
| 40 // We need to be notified of completion before |callback| is called, so that | |
| 41 // we can clear out |cur_request_*|. | |
| 42 CompletionCallback transient_callback = | |
| 43 callback.is_null() ? CompletionCallback() : callback_; | |
| 44 | |
| 45 int rv = resolver_->Resolve( | |
| 46 info, priority, addresses, transient_callback, &request, net_log); | |
| 47 | |
| 48 if (rv == ERR_IO_PENDING) { | |
| 49 DCHECK_EQ(false, callback.is_null()); | |
| 50 // Cleared in OnResolveCompletion(). | |
| 51 cur_request_ = request; | |
| 52 cur_request_callback_ = callback; | |
| 53 } | |
| 54 | |
| 55 return rv; | |
| 56 } | |
| 57 | |
| 58 void SingleRequestHostResolver::Cancel() { | |
| 59 if (!cur_request_callback_.is_null()) { | |
| 60 resolver_->CancelRequest(cur_request_); | |
| 61 cur_request_ = NULL; | |
| 62 cur_request_callback_.Reset(); | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 void SingleRequestHostResolver::OnResolveCompletion(int result) { | |
| 67 // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed. | |
| 68 tracked_objects::ScopedTracker tracking_profile( | |
| 69 FROM_HERE_WITH_EXPLICIT_FUNCTION( | |
| 70 "436634 SingleRequestHostResolver::OnResolveCompletion")); | |
| 71 | |
| 72 DCHECK(cur_request_); | |
| 73 DCHECK_EQ(false, cur_request_callback_.is_null()); | |
| 74 | |
| 75 CompletionCallback callback = cur_request_callback_; | |
| 76 | |
| 77 // Clear the outstanding request information. | |
| 78 cur_request_ = NULL; | |
| 79 cur_request_callback_.Reset(); | |
| 80 | |
| 81 // Call the user's original callback. | |
| 82 callback.Run(result); | |
| 83 } | |
| 84 | |
| 85 } // namespace net | |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master