Review Request: Avoid calling KWallet::openWallet several times

[Commit Hook]

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This review has been submitted with commit c086a55bb68b932348f68711f38684cbd12d2da7 by Daniele E. Domenichelli to branch kde-telepathy-0.5.

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On Nov. 22, 2012, 9:27 p.m., Daniele Elmo Domenichelli wrote:
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> http://git.reviewboard.kde.org/r/107426/
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> (Updated Nov. 22, 2012, 9:27 p.m.)
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> Review request for Telepathy and David Edmundson.
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> Description
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> In order to avoid the problem when kwallet is closed while kcm accounts is open, we introduced a bug: if more than one openWallet call is done at the same time, we reset the scoped pointer with a new wallet, the old wallet is deleted and therefore the signal is never emitted.
> This patch uses a QMutex to avoid trying the wallet several times if it is already being opened.
> In order to catch the signal from the KWallet, I needed a QObject, and since the KTp::WalletInterface is using K_GLOBAL_STATIC, I used the private class instead.
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> This addresses bug 310505.
>     http://bugs.kde.org/show_bug.cgi?id=310505
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> Diffs
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>   KTp/wallet-interface.cpp 428c02e48365c09fb579a26a73ec01efac029864 
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> Diff: http://git.reviewboard.kde.org/r/107426/diff/
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> Testing
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> Disconnected all accounts, closed the wallet and reconnected all accounts several times (accepting and canceling the kwallet dialog)
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> Tried to randomly connect/disconnect accounts from kcm while randomly close kwallet and accepting/cancelling kwallet dialog.
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> Thanks,
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> Daniele Elmo Domenichelli
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