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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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This commit is contained in:
Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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68
dom/system/gonk/NetIdManager.cpp Normal file
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/* 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 "NetIdManager.h"
NetIdManager::NetIdManager()
: mNextNetId(MIN_NET_ID)
{
}
int NetIdManager::getNextNetId()
{
// Modified from
// http://androidxref.com/5.0.0_r2/xref/frameworks/base/services/
// core/java/com/android/server/ConnectivityService.java#764
int netId = mNextNetId;
if (++mNextNetId > MAX_NET_ID) {
mNextNetId = MIN_NET_ID;
}
return netId;
}
void NetIdManager::acquire(const nsString& aInterfaceName,
NetIdInfo* aNetIdInfo)
{
// Lookup or create one.
if (!mInterfaceToNetIdHash.Get(aInterfaceName, aNetIdInfo)) {
aNetIdInfo->mNetId = getNextNetId();
aNetIdInfo->mRefCnt = 1;
} else {
aNetIdInfo->mRefCnt++;
}
// Update hash and return.
mInterfaceToNetIdHash.Put(aInterfaceName, *aNetIdInfo);
return;
}
bool NetIdManager::lookup(const nsString& aInterfaceName,
NetIdInfo* aNetIdInfo)
{
return mInterfaceToNetIdHash.Get(aInterfaceName, aNetIdInfo);
}
bool NetIdManager::release(const nsString& aInterfaceName,
NetIdInfo* aNetIdInfo)
{
if (!mInterfaceToNetIdHash.Get(aInterfaceName, aNetIdInfo)) {
return false; // No such key.
}
aNetIdInfo->mRefCnt--;
// Update the hash if still be referenced.
if (aNetIdInfo->mRefCnt > 0) {
mInterfaceToNetIdHash.Put(aInterfaceName, *aNetIdInfo);
return true;
}
// No longer be referenced. Remove the entry.
mInterfaceToNetIdHash.Remove(aInterfaceName);
return true;
}