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45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
//
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// closeall.cpp
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// Defines _fcloseall(), which closes all opened files.
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//
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#include <corecrt_internal_stdio.h>
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// Closes all streams currently open except for stdin, stdout, and stderr. All
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// tmpfile()-created streams are closed as well. Returns EOF on failure; returns
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// the number of closed streams on success.
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extern "C" int __cdecl _fcloseall()
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{
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int count = 0;
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__acrt_lock(__acrt_stdio_index_lock);
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__try
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{
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for (int i = _IOB_ENTRIES; i != _nstream; ++i)
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{
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if (__piob[i] == nullptr)
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continue;
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// If the stream is in use, close it:
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if (__crt_stdio_stream(__piob[i]).is_in_use() && fclose(&__piob[i]->_public_file) != EOF)
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{
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++count;
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}
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DeleteCriticalSection(&__piob[i]->_lock);
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_free_crt(__piob[i]);
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__piob[i] = nullptr;
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}
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}
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__finally
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{
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__acrt_unlock(__acrt_stdio_index_lock);
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}
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__endtry
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return count;
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}
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