CODEWITHSUNDEEP
objective-ccocoamacosmemory-management
Alex
Alex

Reputation: 7612

cocoa - How to programmatically retrieve the amount of memory your application is using?

I would like to know how much memory my application is using. How would I be able to retrieve this programmatically? Is there an easy Cocoa way to do this, or would I have to go all the way down to C?

Thanks!

Upvotes: 5

Views: 1466

Answers (2)

Alex
Alex

Reputation: 7612

- (NSInteger)getMemoryUsedInMegaBytes
{
    NSInteger memoryInBytes = [self getMemoryUsedInBytes];

    return memoryInBytes/1048576;
}

- (NSInteger)getMemoryUsedInBytes
{
    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 ) 
    {
        return info.resident_size;
    } 
    else 
    {
        return 0;
    }
}

Upvotes: 0

Anne
Anne

Reputation: 27073

Working snippet:

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 ) {
    NSLog(@"Memory in use (in bytes): %u", info.resident_size);
} else {
    NSLog(@"Error with task_info(): %s", mach_error_string(kerr));
}

Unfortunately I don't know the original source anymore.

Upvotes: 7

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