AvailableMemory.cpp

00001 #include "AvailableMemory.h"
00002 #include <stdlib.h>
00003 #include <stdio.h>
00004 
00005 namespace segundo {
00006 namespace Utilities {
00007 
00008 int AvailableMemory(int resolution, int maximum, bool disableInterrupts) {
00009 
00010     if (resolution < 1) resolution = 1;
00011     if (maximum < 0) maximum = 0;
00012 
00013     int low = 0;
00014     int high = maximum + 1;
00015 
00016     if (disableInterrupts) __disable_irq();
00017 
00018     while (high - low > resolution) {
00019         int mid = (low + high) / 2;
00020         printf("try malloc %i bytes\n",mid);
00021         void* p = malloc(mid);
00022         if (p == NULL) {
00023             high = mid;
00024         } else {
00025             free(p);
00026             low = mid;
00027         }
00028     }
00029 
00030     if (disableInterrupts) __enable_irq();
00031 
00032     return low;
00033 }
00034 
00035 } // namespace Utilities
00036 } // namespace segundo