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