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https://github.com/mpv-player/mpv
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9692814502
See: https://msdn.microsoft.com/en-us/library/windows/desktop/dd743946.aspx Microsoft example code often uses a SAFE_RELEASE macro like the one in the above link. This makes it easier to avoid errors when releasing COM interfaces. It also reduces noise in COM-heavy code. ao_wasapi.h also had a macro called SAFE_RELEASE, though unlike the version above, its SAFE_RELEASE macro accepted a second parameter which allowed it to destroy arbitrary objects other than just COM interfaces. This renames ao_wasapi's SAFE_RELEASE to SAFE_DESTROY, which should more accurately reflect what it does and prevent confusion with the Microsoft version.
34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MP_WINDOWS_UTILS_H_
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#define MP_WINDOWS_UTILS_H_
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#include <windows.h>
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// Conditionally release a COM interface and set the pointer to NULL
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#define SAFE_RELEASE(u) \
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do { if ((u) != NULL) (u)->lpVtbl->Release(u); (u) = NULL; } while(0)
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char *mp_GUID_to_str_buf(char *buf, size_t buf_size, const GUID *guid);
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#define mp_GUID_to_str(guid) mp_GUID_to_str_buf((char[40]){0}, 40, (guid))
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char *mp_HRESULT_to_str_buf(char *buf, size_t buf_size, HRESULT hr);
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#define mp_HRESULT_to_str(hr) mp_HRESULT_to_str_buf((char[256]){0}, 256, (hr))
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#define mp_LastError_to_str() mp_HRESULT_to_str(HRESULT_FROM_WIN32(GetLastError()))
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#endif
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