Author: Scott Gasch
Date: 15:18:17 10/04/01
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On October 04, 2001 at 08:47:44, JW de Kort wrote: >Hi friends, > >just a simple question. I want my hashtable to be as big as possible but in >order to decide the size i need to know how much physical memory is still >available. The problem is however that i do not know which instruction i should >use to get the size of the available memory. Iám using Visual C++ 4.2. Can >anybody help me? > >thanks! > >Jan Willem If you are only writing for win32 you can use the GlobalMemoryStatus[Ex] call. It returns a struct with the approx percentage of physical memory in use and the total size of physical memory on the system. This is totally non-portable and, further, the call only works right on win2k and later... and on machines with <= 4Gb of memory. And, of course, the return struct is a snapshot... its possible that you could make this call just before some other process allocated a ton of memory and would then be working with stale information. While I'm talking about memory management on win32, let me encourage you to have a look at VirtualLock, VirtualProtect and Get/SetProcessWorkingSetSize. http://msdn.microsoft.com. Good luck, Scott
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