Jim Michaels писал 2013-11-18 01:12:
> what's going on? GlobalMemoryStatusEx() always returns failure. I even
> memset() the struct with 0's, no difference.
>
>
> #include <iostream>
> #Include <memory.h>
> #include <windows.h>
> #include <stdint.h>
> #include <WinBase.h>
>
>
> typedef uint64_t addressType; //with 64-bit boxes, there may be
> support for __int128, but I guess not yet with some compilers
> typedef uint64_t vecElementType;
> MEMORYSTATUSEX mse;
>
> addressType availableRAM(void) {
> memset(&mse,0, sizeof(MEMORYSTATUSEX));
> if (0==GlobalMemoryStatusEx(&mse)) {
> std::cout<<"GlobalMemoryStatusEx():ERROR\n";
> return 0;
> }
> addressType ram=mse.ullAvailPhys;
> std::cout<<"availableRam()="<<ram<<"\n";
> return ram; //do I need to use a percentage here? is there a
> structure overhead with bitset?
> }
> int main(int argc, char * argv[]) {
> UINT_TYPE n=0;
> size_t sp,ep;
>
> availRam = availableRAM();
> if (0!=availRam) {
> availRam -= RESERVE_RAM;//2*2^30. we reserve 2GiB for
> applications to run fast like browsers etc
> }
> return 0;
> }
Your code is wrong.
Just now I have compiled and executed the code I got from MSDN site.
// Sample output:
// There is 51 percent of memory in use.
// There are 2029968 total KB of physical memory.
// There are 987388 free KB of physical memory.
// There are 3884620 total KB of paging file.
// There are 2799776 free KB of paging file.
// There are 2097024 total KB of virtual memory.
// There are 2084876 free KB of virtual memory.
// There are 0 free KB of extended memory.
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
// Use to convert bytes to KB
#define DIV 1024
// Specify the width of the field in which to print the numbers.
// The asterisk in the format specifier "%*I64d" takes an integer
// argument and uses it to pad and right justify the number.
#define WIDTH 11
int main() {
MEMORYSTATUSEX statex;
statex.dwLength = sizeof (statex);
GlobalMemoryStatusEx (&statex);
_tprintf (TEXT("There is %*ld percent of memory in use.\n"),
WIDTH, statex.dwMemoryLoad);
_tprintf (TEXT("There are %*I64d total KB of physical memory.\n"),
WIDTH, statex.ullTotalPhys/DIV);
_tprintf (TEXT("There are %*I64d free KB of physical memory.\n"),
WIDTH, statex.ullAvailPhys/DIV);
_tprintf (TEXT("There are %*I64d total KB of paging file.\n"),
WIDTH, statex.ullTotalPageFile/DIV);
_tprintf (TEXT("There are %*I64d free KB of paging file.\n"),
WIDTH, statex.ullAvailPageFile/DIV);
_tprintf (TEXT("There are %*I64d total KB of virtual memory.\n"),
WIDTH, statex.ullTotalVirtual/DIV);
_tprintf (TEXT("There are %*I64d free KB of virtual memory.\n"),
WIDTH, statex.ullAvailVirtual/DIV);
// Show the amount of extended memory available.
_tprintf (TEXT("There are %*I64d free KB of extended memory.\n"),
WIDTH, statex.ullAvailExtendedVirtual/DIV);
}
--
Regards, niXman
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