memoryreport.c

// Copyright (C) 2011 by Raphael Cruzeiro
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include <stdio.h>
#include <mach/mach.h>

#include "memoryreport.h"

void memoryReport()
{
    static unsigned last_resident_size = 0;
    static unsigned greatest = 0;
    static unsigned last_greatest = 0;
    
    struct task_basic_info info;
    mach_msg_type_number_t size = sizeof(info);
    kern_return_t kerr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &size);
    
    if(kerr == KERN_SUCCESS) {
        int diff = (int)info.resident_size - (int)last_resident_size;
        unsigned latest = info.resident_size;
        if(latest > greatest) greatest = latest;
        int greatest_diff = greatest - last_greatest;
        int last_greatest_diff = latest - greatest;
        
        printf("Mem: %10u (%10d) : %10d : greatest: %10u (%d)\n", info.resident_size, diff, last_greatest_diff, greatest, greatest_diff);
    }
    
    last_resident_size = info.resident_size;
    last_greatest = greatest;
}