AvailableMemory - finds size of largest block of heap memory

Users » networker » Code » AvailableMemory

finds size of largest block of heap memory

Dependents: myBlueUSB mbed_TANK_Kinect myBlueUSB_ros myBlueUSB_localfix

AvailableMemory.cpp@0:2b2aa11cebd7, 2011-05-04 (annotated)

User	Revision	Line number	New contents of line
networker	0:2b2aa11cebd7	1	#include "AvailableMemory.h"
networker	0:2b2aa11cebd7	2	#include <stdlib.h>
networker	0:2b2aa11cebd7	3
networker	0:2b2aa11cebd7	4	namespace segundo {
networker	0:2b2aa11cebd7	5	namespace Utilities {
networker	0:2b2aa11cebd7	6
networker	0:2b2aa11cebd7	7	int AvailableMemory(int resolution, int maximum, bool disableInterrupts) {
networker	0:2b2aa11cebd7	8
networker	0:2b2aa11cebd7	9	if (resolution < 1) resolution = 1;
networker	0:2b2aa11cebd7	10	if (maximum < 0) maximum = 0;
networker	0:2b2aa11cebd7	11
networker	0:2b2aa11cebd7	12	int low = 0;
networker	0:2b2aa11cebd7	13	int high = maximum + 1;
networker	0:2b2aa11cebd7	14
networker	0:2b2aa11cebd7	15	if (disableInterrupts) __disable_irq();
networker	0:2b2aa11cebd7	16
networker	0:2b2aa11cebd7	17	while (high - low > resolution) {
networker	0:2b2aa11cebd7	18	int mid = (low + high) / 2;
networker	0:2b2aa11cebd7	19	void* p = malloc(mid);
networker	0:2b2aa11cebd7	20	if (p == NULL) {
networker	0:2b2aa11cebd7	21	high = mid;
networker	0:2b2aa11cebd7	22	} else {
networker	0:2b2aa11cebd7	23	free(p);
networker	0:2b2aa11cebd7	24	low = mid;
networker	0:2b2aa11cebd7	25	}
networker	0:2b2aa11cebd7	26	}
networker	0:2b2aa11cebd7	27
networker	0:2b2aa11cebd7	28	if (disableInterrupts) __enable_irq();
networker	0:2b2aa11cebd7	29
networker	0:2b2aa11cebd7	30	return low;
networker	0:2b2aa11cebd7	31	}
networker	0:2b2aa11cebd7	32
networker	0:2b2aa11cebd7	33	} // namespace Utilities
networker	0:2b2aa11cebd7	34	} // namespace segundo