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37 lines
956 B
C++
37 lines
956 B
C++
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//
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// commit.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 _commit(), which flushes a file buffer to disk.
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//
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#include <corecrt_internal_lowio.h>
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// Flushes the buffer for the given file to disk.
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//
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// On success, 0 is returned. On failure, -1 is returned and errno is set.
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extern "C" int __cdecl _commit(int const fh)
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{
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_CHECK_FH_RETURN(fh, EBADF, -1);
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_VALIDATE_RETURN((fh >= 0 && (unsigned)fh < (unsigned)_nhandle), EBADF, -1);
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_VALIDATE_RETURN((_osfile(fh) & FOPEN), EBADF, -1);
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return __acrt_lowio_lock_fh_and_call(fh, [&]()
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{
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if (_osfile(fh) & FOPEN)
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{
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if (FlushFileBuffers(reinterpret_cast<HANDLE>(_get_osfhandle(fh))))
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return 0; // Success
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_doserrno = GetLastError();
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}
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errno = EBADF;
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_ASSERTE(("Invalid file descriptor. File possibly closed by a different thread",0));
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return -1;
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});
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}
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