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1366b0f841
There's a problem where the destruction of the contained rtc::Thread will join the spawned thread blocked on getaddrinfo(). However, getaddrinfo() is sometimes slow and this behavior hinders packet traffic when it happens. Fix this by using the brand new detachable PlatformThread support. Fixed: b:181572711, webrtc:12659 Change-Id: I0b7e0cca3b8b1b3ed22328d940b1bb95cacb5e24 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/214780 Commit-Queue: Markus Handell <handellm@webrtc.org> Reviewed-by: Tommi <tommi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33804}
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
/*
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* Copyright 2008 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_ASYNC_RESOLVER_H_
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#define RTC_BASE_ASYNC_RESOLVER_H_
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#if defined(WEBRTC_POSIX)
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#include <sys/socket.h>
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#elif WEBRTC_WIN
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#include <winsock2.h> // NOLINT
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#endif
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#include <vector>
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#include "api/sequence_checker.h"
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#include "rtc_base/async_resolver_interface.h"
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#include "rtc_base/event.h"
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#include "rtc_base/ip_address.h"
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#include "rtc_base/ref_counted_object.h"
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#include "rtc_base/socket_address.h"
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#include "rtc_base/system/no_unique_address.h"
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#include "rtc_base/system/rtc_export.h"
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#include "rtc_base/task_utils/pending_task_safety_flag.h"
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#include "rtc_base/thread.h"
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#include "rtc_base/thread_annotations.h"
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namespace rtc {
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// AsyncResolver will perform async DNS resolution, signaling the result on
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// the SignalDone from AsyncResolverInterface when the operation completes.
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//
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// This class is thread-compatible, and all methods and destruction needs to
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// happen from the same rtc::Thread, except for Destroy which is allowed to
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// happen on another context provided it's not happening concurrently to another
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// public API call, and is the last access to the object.
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class RTC_EXPORT AsyncResolver : public AsyncResolverInterface {
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public:
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AsyncResolver();
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~AsyncResolver() override;
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void Start(const SocketAddress& addr) override;
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bool GetResolvedAddress(int family, SocketAddress* addr) const override;
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int GetError() const override;
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void Destroy(bool wait) override;
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const std::vector<IPAddress>& addresses() const;
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private:
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// Fwd decl.
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struct State;
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void ResolveDone(std::vector<IPAddress> addresses, int error)
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RTC_EXCLUSIVE_LOCKS_REQUIRED(sequence_checker_);
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void MaybeSelfDestruct();
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SocketAddress addr_ RTC_GUARDED_BY(sequence_checker_);
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std::vector<IPAddress> addresses_ RTC_GUARDED_BY(sequence_checker_);
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int error_ RTC_GUARDED_BY(sequence_checker_);
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bool recursion_check_ =
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false; // Protects against SignalDone calling into Destroy.
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bool destroy_called_ = false;
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scoped_refptr<State> state_;
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RTC_NO_UNIQUE_ADDRESS webrtc::SequenceChecker sequence_checker_;
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};
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} // namespace rtc
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#endif // RTC_BASE_ASYNC_RESOLVER_H_
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