コード例 #1
0
ファイル: Program.cs プロジェクト: emclient/mac-playground
        static void MaxOpenFiles(bool change)
        {
            var lim = new LibC.rlimit();
            var ok  = LibC.getrlimit((int)LibC.RLimit.NoFile, ref lim);

            Console.WriteLine($"getrlimit({lim.cur}, {lim.max}) => {ok}");

            if (!change)
            {
                return;
            }

            int n = 9000;

            lim.cur = lim.max = (UInt64)n;
            ok      = LibC.setrlimit((int)LibC.RLimit.NoFile, ref lim);
            Console.WriteLine($"setrlimit({lim.cur}, {lim.max}) => {ok}");
            ok = LibC.getrlimit((int)LibC.RLimit.NoFile, ref lim);
            Console.WriteLine($"getrlimit({lim.cur}, {lim.max}) => {ok}");

            lim.cur = (UInt64)4000;
            ok      = LibC.setrlimit((int)LibC.RLimit.NoFile, ref lim);
            Console.WriteLine($"setrlimit({lim.cur}, {lim.max}) => {ok}");
            ok = LibC.getrlimit((int)LibC.RLimit.NoFile, ref lim);
            Console.WriteLine($"getrlimit({lim.cur}, {lim.max}) => {ok}");

            var a = new Stream[n];
            var f = Path.GetTempFileName();
            int i = 0;

            try
            {
                for (i = 0; i < n; ++i)
                {
                    a[i] = new FileStream(f, FileMode.Open, FileAccess.Read);
                    //var result = LibC.open(f, LibC.FileMode.S_IRUSR);
                    //var result = LibC.fopen(f, "rb");
                    //if (result == IntPtr.Zero)
                    //break;
                }
            }
            catch
            {
            }
            finally
            {
                for (int j = i - 1; j >= 0; --j)
                {
                    
 a[j].Close();
                }
                

            }
            Console.WriteLine($"#{i}");
        }