38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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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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#pragma once
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#include <type_traits>
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#include <systools/win32/uwinapi.h>
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#pragma comment(lib, "Kernel32.lib") // for Sleep
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namespace sal::systools
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{
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// Some system calls (e.g., clipboard access functions) may fail first time, because the resource
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// may only be accessed by one process at a time. This function allows to retry failed call up to
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// specified number of times with a specified timeout (in ms), until the call succeeds or the limit
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// of attempts is exceeded.
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// Usage:
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// HRESULT hr = sal::systools::RetryIfFailed(10, 100, []{ return OleFlushClipboard(); });
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template <typename Func>
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std::enable_if_t<std::is_same_v<std::invoke_result_t<Func>, HRESULT>, HRESULT>
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RetryIfFailed(unsigned times, unsigned msTimeout, Func func)
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{
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for (unsigned i = 0;; ++i)
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{
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if (HRESULT hr = func(); SUCCEEDED(hr) || i >= times)
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return hr;
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Sleep(msTimeout);
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}
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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