static VOID CALLBACK on_file_io_complete_win32()

in win32/src/file_win32.c [38:78]

• 32 lines of code
• 6 McCabe index (conditional complexity)

static VOID CALLBACK on_file_io_complete_win32(PTP_CALLBACK_INSTANCE instance, PVOID context, PVOID overlapped, ULONG io_result, ULONG_PTR number_of_bytes_transferred, PTP_IO io)
{
    (void)instance;
    (void)context;

    if (overlapped == NULL)
    {
        LogError("invalid argument PTP_CALLBACK_INSTANCE instance=%p, PVOID context=%p, PVOID overlapped=%p, ULONG io_result=%" PRIu32 ", ULONG_PTR number_of_bytes_transferred=%" PRIuPTR ", PTP_IO io=%p",
            instance, context, overlapped, io_result, number_of_bytes_transferred, io);
    }
    else
    {
        /*Codes_SRS_FILE_WIN32_43_034: [ on_file_io_complete_win32 shall recover the file handle, the number of bytes requested by the user, user_callback and user_context from the context containing overlapped. ]*/
        FILE_WIN32_IO* io_context = CONTAINING_RECORD(overlapped, FILE_WIN32_IO, ov);

        FILE_CB user_callback = io_context->user_callback;
        void* user_callback_context = io_context->user_context;

        bool all_bytes_were_transferred = (uint32_t)number_of_bytes_transferred == io_context->size;

        if (io_result != NO_ERROR)
        {
            LogError("Error in asynchronous operation. io_result=%" PRIu32 "", io_result);
        }
        if (!all_bytes_were_transferred)
        {
            LogError("All bytes were not transferred. number_of_bytes_transferred=%" PRIuPTR "; io_context->size=%" PRIu32 "", 
                number_of_bytes_transferred, io_context->size);
        }

        if (!CloseHandle(io_context->ov.hEvent))
        {
            LogLastError("failure in CloseHandle(io_context->ov.hEvent=%p)", io_context->ov.hEvent);
        }
        free(io_context);

        /*Codes_SRS_FILE_WIN32_43_066: [ on_file_io_complete_win32 shall call user_callback with is_successful as true if and only if GetOverlappedResult returns true and number_of_bytes_transferred is equal to the number of bytes requested by the user. ]*/
        /*Codes_SRS_FILE_WIN32_43_068: [ If either GetOverlappedResult returns false or number_of_bytes_transferred is not equal to the bytes requested by the user, on_file_io_complete_win32 shall return false. ]*/
        user_callback(user_callback_context, io_result == NO_ERROR && all_bytes_were_transferred);
    }
}