cpu usage

This is a discussion on cpu usage within the C++ Programming forums, part of the General Programming Boards category; ok, just to let you all know, this is basically my first complete program, so if what i'm asking is ...

  1. #1
    Registered User
    Join Date
    Sep 2003
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    2

    cpu usage

    ok, just to let you all know, this is basically my first complete program, so if what i'm asking is just plain stupid, don't yell.

    the program is designed to make a backup of a text file every two hours until manually terminated. the problem i have is that i don't know a good way to make a timer to do that. i tried one way, and yes it runs fine, but it ended up taking about 70% of my cpu resources to run a 90-line program. so obviously that's no good. here's the way i tried to make the timer.
    Code:
    int main()
    {
    	int x=0;
    	int diff=0;
    	long start=0, current=0;
    	char file_name[15]="";
    
    	while(x==0)
    		{
    			start=time(NULL);
    
    			while(diff<60)
    				{
    					current=time(NULL);
    					diff=current-start;
    				}
    			strcat(file_name,get_name());
    			create_backup(file_name);
    		}
    	return 0;
    }
    if anybody knows a good way to do this(and i'm sure everybody but me does), please let me know. any help is greatly appreciated.

  2. #2
    End Of Line Hammer's Avatar
    Join Date
    Apr 2002
    Posts
    6,231
    Review your compilers documentation to find a sleep() or delay() type function. These local implementations won't hog the CPU like your version.
    http://faq.cprogramming.com/cgi-bin/...&id=1043284392
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  3. #3
    Registered User
    Join Date
    Sep 2003
    Posts
    2
    ahhh, thanks much. just what i was looking for.

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