dom/midi/MIDIMessageQueue.cpp
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "MIDIMessageQueue.h"

namespace mozilla {
namespace dom {

MIDIMessageQueue::MIDIMessageQueue() : mMutex("MIDIMessageQueue::mMutex") {}

class MIDIMessageTimestampComparator {
 public:
  bool Equals(const MIDIMessage& a, const MIDIMessage& b) const {
    return a.timestamp() == b.timestamp();
  }
  bool LessThan(const MIDIMessage& a, const MIDIMessage& b) const {
    return a.timestamp() < b.timestamp();
  }
};

void MIDIMessageQueue::Add(nsTArray<MIDIMessage>& aMsg) {
  MutexAutoLock lock(mMutex);
  for (auto msg : aMsg) {
    mMessageQueue.InsertElementSorted(msg, MIDIMessageTimestampComparator());
  }
}

void MIDIMessageQueue::GetMessagesBefore(TimeStamp aTimestamp,
                                         nsTArray<MIDIMessage>& aMsgQueue) {
  MutexAutoLock lock(mMutex);
  int i = 0;
  for (auto msg : mMessageQueue) {
    if (aTimestamp < msg.timestamp()) {
      break;
    }
    aMsgQueue.AppendElement(msg);
    i++;
  }
  if (i > 0) {
    mMessageQueue.RemoveElementsAt(0, i);
  }
}

void MIDIMessageQueue::GetMessages(nsTArray<MIDIMessage>& aMsgQueue) {
  MutexAutoLock lock(mMutex);
  aMsgQueue.AppendElements(mMessageQueue);
  mMessageQueue.Clear();
}

void MIDIMessageQueue::Clear() {
  MutexAutoLock lock(mMutex);
  mMessageQueue.Clear();
}

void MIDIMessageQueue::ClearAfterNow() {
  MutexAutoLock lock(mMutex);
  TimeStamp now = TimeStamp::Now();
  int i = 0;
  for (auto msg : mMessageQueue) {
    if (now < msg.timestamp()) {
      break;
    }
    i++;
  }
  if (i > 0) {
    mMessageQueue.RemoveElementsAt(0, i);
  }
}

}  // namespace dom
}  // namespace mozilla