|
Overview |
|
|
|
Group |
|
|
|
Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
|
|
|
InterlockedCompareExchange
[New - Windows NT]
The InterlockedCompareExchange function performs an atomic comparison of the values specified in the Destination and Comperand parameters and exchange of the values, based on the outcome of the
comparison. The function prevents more than one thread from using the same variable
simultaneously.
PVOID InterlockedCompareExchange(
PVOID *Destination,
| // pointer to the destination pointer
| PVOID Exchange,
| // the exchange value
| PVOID Comperand
| // the value to compare
| );
|
|
Parameters
Destination
Specifies the address of the destination value. This is a 32-bit value. The
sign is ignored.
Exchange
Specifies the exchange value. This is a 32-bit value. The sign is ignored.
Comperand
Specifies the value to compare to Destination. This is a 32-bit value. The sign is ignored.
Return Values
The return value is the initial value of the destination.
Remarks
The functions InterlockedCompareExchange, InterlockedDecrement, InterlockedExchange, InterlockedExchangeAdd, and InterlockedIncrement provide a simple mechanism for synchronizing access to a variable that is
shared by multiple threads. The threads of different processes can use this
mechanism if the variable is in shared memory.
The InterlockedCompareExchange function performs an atomic comparison of the Destination value with the Comperand value. If the Destination value is equal to the Comperand value, the Exchange value is stored in the address specified by Destination. Otherwise, no operation is performed.
The variables for InterlockedCompareExchange must be aligned on a 32-bit boundary; otherwise, this function will fail on
multiprocessor x86 systems.
See Also
InterlockedDecrement, InterlockedExchange, InterlockedExchangeAdd, InterlockedIncrement
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
