C#

George_George wrote:

I think you metn the "list" object is the synchronising object

George_George wrote:

But what do you mean "the object you are protecting with the lock", you mean also the list obejct which we are going to make it thread-safe?

George_George wrote:

Do you know what means "A thread can block only on the first, or outermost lock."?

Colin Angus Mackay wrote:

It means that when it encounters the first lock (or outermost lock) the thread blocks others from accessing the object that is locked.

Colin Angus Mackay wrote:

An individual thread can lock an object as many times as it likes, but it only locks on the first occurrence.

George_George wrote:

Even if the thread can not acquire the outermost lock, it will block other thread from accessing the lock object to try to lock?

George_George wrote:

It is a typo

<br />
1<br />
0	33	10	85	162	95	168	-1	5	//Bull Fighter<br />
1	29	30	40	113	45	116	-1	3	//Hound<br />
2	41	5	126	160	125	161	-1	2	//Budge Dragon<br />
3	38	5	106	161	111	160	-1	2	//Spider<br />
4	38	5	106	161	111	160	-1	2	//Elite Bull Fighter<br />
6	38	5	106	161	111	160	-1	2	//Lich<br />
7	38	5	106	161	111	160	-1	2	//Giant<br />
14	38	5	106	161	111	160	-1	2	//Skeleton Warrior<br />
end<br />
0<br />
275	33	10	85	162	95	168	-1	5	//Test 1 Section 2<br />
275	29	30	40	113	45	116	-1	3	//Test 2 Section 2<br />
275	41	5	126	160	125	161	-1	2	//Test 3 Section 2<br />
275	38	5	106	161	111	160	-1	2	//Test 4 Section 2<br />
end

if (pieces[0] == "end")<br />
{<br />
    curRec += 2;<br />
    displayLine(curRec);<br />
}<br />
else<br />
{

       // Displays the line in the arraylist<br />
        public void displayLine(int linenumber)<br />
        {<br />
            // If the line number is in the range of total values<br />
            if ((linenumber >= 0) && (linenumber < lines.Count))<br />
            {<br />
<br />
                // Get the string out of the arraylist<br />
                String line = (String)lines[linenumber];<br />
<br />
                // Split it into various pieces on the space<br />
                String[] pieces = line.Split('\t');<br />
<br />
                if (pieces[0] == "end")<br />
                {<br />
                    curRec += 2;<br />
                    displayLine(curRec);<br />
                }<br />
                else<br />
                {<br />
                    txtID.Text = pieces[0];<br />
                    txtMap.Text = pieces[1];<br />
                    txtMoving.Text = pieces[2];<br />
                    txtXStart.Text = pieces[3];<br />
                    txtYStart.Text = pieces[4];<br />
                    txtXEnd.Text = pieces[5];<br />
                    txtYEnd.Text = pieces[6];<br />
                    txtDirection.Text = pieces[7];<br />
                    txtCount.Text = pieces[8];<br />
                    txtComment.Text = pieces[9];<br />
                    mobImage.ImageLocation = "D:/images/" + pieces[0] + ".jpg";<br />
                }<br />
            }<br />
<br />
        }<br />
<br />
        // Arraylist to hold all lines of the file.<br />
        ArrayList lines = new ArrayList(100);<br />
<br />
        // Pointer variable to point to active record<br />
        int curRec = 0;<br />
<br />
        // Loading data and reading txt file<br />
        public void Form1_Load(object sender, EventArgs e)<br />
        {<br />
            // Open the data file<br />
            StreamReader f = new StreamReader(new FileStream(@"D:\monstersetbase.txt", FileMode.Open));<br />
<br />
            String curLine;<br />
<br />
            // Read in the data line by line and add it to our ArrayList<br />
            while ((curLine = f.ReadLine()) != null)<br />
            {<br />
                lines.Add(curLine);<br />
            }<br />
<br />
            // Close<br />
            f.Close();<br />
<br />
            // Add one so it will not crash<br />
            curRec += 1;<br />
<br />
            // Display first line<br />
            displayLine(curRec);<br />
        }<br />
<br />
        private void nxtButton_Click_1(object sender, EventArgs e)<br />
        {<br />
            if (curRec < lines.Count - 1)<br />
            {<br />
                curRec += 1;<br />
                displayLine(curRec);<br />
                prvButton.Enabled = true;<br />
            }<br />
        }<br />
<br />
        private void prvButton_Click_1(object sender, EventArgs e)<br />
        {<br />
            if (curRec == 2)<br />
            {<br />
                prvButton.Enabled = false;<br />
            }<br />
            if (curRec > 0)<br />
            {<br />
                curRec -= 1;<br />
                displayLine(curRec);<br />
            }<br />
        }