National Instruments 320685D-01 ユーザーズマニュアル

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 National Instruments Corporation

6-1

LabWindows/CVI Programmer Reference Manual

This chapter contains guidelines and caveats for writing platform-independent 
LabWindows/CVI applications. LabWindows/CVI currently runs under Windows 3.1 
and Windows 95/NT for the PC, and Solaris 1 and Solaris 2 for the SPARCstation.

One major feature of LabWindows/CVI is that it supports multiplatform programming. 
Following a few simple guidelines assures the portability of a LabWindows/CVI application:

•

Write code in strict ANSI C.

•

Observe and repair all LabWindows/CVI compile, link, and run-time diagnostics.

•

Avoid using system dependent calls when possible.

•

Avoid using non-portable image formats and fonts in your user interface.

LabWindows/CVI is portable because it uses ANSI C program files, LabWindows/CVI User 
Interface Resource files, and National Instruments libraries.

You must segregate any platform dependent code in your source code using conditional 
preprocessor directives. You can use the built-in macros, such as 

_NI_mswin32_

, 

_NI_mswin16_

, 

_NI_mswin_

, 

_NI_unix_

 and 

_NI_sparc_

. More information on the 

macros that LabWindows/CVI automatically defines is available in the 

section of Chapter 1, 

Avoid using Windows 32-bit SDK functions unless you intend your LabWindows/CVI 
application to run only under Windows 95/NT.

The 

sopen

 and 

fdopen

 functions are available only under Windows. Avoid using them 

unless you intend your LabWindows/CVI application to run only under Windows.

Avoid using UNIX host system library calls such as 

ioctl

, 

fcntl

, and so on, unless you 

intend the LabWindows/CVI application to run only under UNIX. Refer to the 

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