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cf5074b5c5
|SocketConsumerBase| handles connection state for |UnixSocketConsumer| and its derived classes. Implementing classes must override a number of virtual methods, to handle notifications about changes to the state of the connection.
127 lines
2.5 KiB
C++
127 lines
2.5 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include "SocketBase.h"
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#include <string.h>
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#include "nsThreadUtils.h"
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namespace mozilla {
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namespace ipc {
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//
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// UnixSocketRawData
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//
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UnixSocketRawData::UnixSocketRawData(size_t aSize)
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: mSize(aSize)
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, mCurrentWriteOffset(0)
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{
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mData = new uint8_t[mSize];
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}
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UnixSocketRawData::UnixSocketRawData(const void* aData, size_t aSize)
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: mSize(aSize)
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, mCurrentWriteOffset(0)
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{
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MOZ_ASSERT(aData || !mSize);
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mData = new uint8_t[mSize];
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memcpy(mData, aData, mSize);
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}
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//
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// SocketConsumerBase
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//
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SocketConsumerBase::~SocketConsumerBase()
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{
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MOZ_ASSERT(mConnectionStatus == SOCKET_DISCONNECTED);
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}
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SocketConnectionStatus
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SocketConsumerBase::GetConnectionStatus() const
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{
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MOZ_ASSERT(NS_IsMainThread());
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return mConnectionStatus;
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}
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int
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SocketConsumerBase::GetSuggestedConnectDelayMs() const
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{
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MOZ_ASSERT(NS_IsMainThread());
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return mConnectDelayMs;
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}
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void
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SocketConsumerBase::NotifySuccess()
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{
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MOZ_ASSERT(NS_IsMainThread());
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mConnectionStatus = SOCKET_CONNECTED;
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mConnectTimestamp = PR_IntervalNow();
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OnConnectSuccess();
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}
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void
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SocketConsumerBase::NotifyError()
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{
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MOZ_ASSERT(NS_IsMainThread());
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mConnectionStatus = SOCKET_DISCONNECTED;
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mConnectDelayMs = CalculateConnectDelayMs();
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OnConnectError();
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}
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void
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SocketConsumerBase::NotifyDisconnect()
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{
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MOZ_ASSERT(NS_IsMainThread());
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mConnectionStatus = SOCKET_DISCONNECTED;
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mConnectDelayMs = CalculateConnectDelayMs();
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OnDisconnect();
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}
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uint32_t
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SocketConsumerBase::CalculateConnectDelayMs() const
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{
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MOZ_ASSERT(NS_IsMainThread());
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uint32_t connectDelayMs = mConnectDelayMs;
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if ((PR_IntervalNow()-mConnectTimestamp) > connectDelayMs) {
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// reset delay if connection has been opened for a while, or...
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connectDelayMs = 0;
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} else if (!connectDelayMs) {
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// ...start with a delay of ~1 sec, or...
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connectDelayMs = 1<<10;
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} else if (connectDelayMs < (1<<16)) {
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// ...otherwise increase delay by a factor of 2
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connectDelayMs <<= 1;
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}
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return connectDelayMs;
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}
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SocketConsumerBase::SocketConsumerBase()
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: mConnectionStatus(SOCKET_DISCONNECTED)
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, mConnectTimestamp(0)
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, mConnectDelayMs(0)
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{ }
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void
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SocketConsumerBase::SetConnectionStatus(
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SocketConnectionStatus aConnectionStatus)
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{
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mConnectionStatus = aConnectionStatus;
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}
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}
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}
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