Rtalloca.shtml
#include <windows.h>
#include <stdio.h>
#include <rtapi.h>
static PVOID vAddress; // virtual memory address returned by RtAllocateContiguousMemory static LARGE_INTEGER pAddress; // physical memory address returned by RtGetPhysicalAddress void main(void) { LARGE_INTEGER maxPhyAddr; //highest physical memory address ULONG size=0; //bytes to allocate maxPhyAddr.QuadPart = 0xFFFFFF; size= 0x1000; // Size in KB. // Allocate memory vAddress = RtAllocateContiguousMemory( size, maxPhyAddr); if (!vAddress) { printf("\nFailure on RtAllocateContiguousMemory\t"); printf("Error=%d\n", GetLastError()); break; } else { printf("\nSuccess on RtAllocateContiguousMemory\n"); printf("Virtual memory address = 0x%08X\n", vAddress); // Get the physical address pAddress = RtGetPhysicalAddress(vAddress); if (!pAddress.QuadPart) { printf("\nFailure on RtGetPhysicalAddress(0x%08X).\t, vAddress"); printf("Error=%d\n", GetLastError()); } else { printf("Success on RtGetPhysicalAddress(0x%08X).\n", vAddress); } // Free memory if (!RtFreeContiguousMemory(vAddress)) { printf("\nFailure on RtFreeContiguousMemory(0x%08X).\t", vAddress); printf("Error Code = %d\n", GetLastError()); } else { printf("Success on RtFreeContiguousMemory(0x%X).\n", vAddress); } } ExitProcess(0); }
