в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

Admin: 1 версия

2010-05-26T12:20:18Z

1 версия

Новая страница

==Allocate and free memory==

<source lang="csharp">using System;
using System.Runtime.InteropServices;
class MainClass
{
static void Main(string[] args)
{
UsePointers();
}
static unsafe public void UsePointers()
{
char * pMyArray = (char*)Marshal.AllocCoTaskMem(6);
while (*pMyArray != "\0")
{
Console.WriteLine(*pMyArray);
pMyArray++;
}
Marshal.FreeCoTaskMem((IntPtr)pMyArray);
}
}</source>

==Allocate memory with System.Runtime.MemoryFailPoint==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.rupilerServices;
public class MainClass
{
public static void Main()
{
using (System.Runtime.MemoryFailPoint gate = new System.Runtime.MemoryFailPoint(100))
{
// Some operation that actually uses the 100MB of memory�
Console.WriteLine("Success for 100MB fail-point");
}
using (System.Runtime.MemoryFailPoint gate = new System.Runtime.MemoryFailPoint(1024*100))
{
// Some operation that actually uses the 100GB of memory�
Console.WriteLine("Success for 100GB fail-point");
}
}
}</source>

==Create Heap and destroy Heap==

<source lang="csharp">using System;
using System.Runtime.InteropServices;
public sealed class MainClass
{
[DllImport("kernel32.dll")]
static extern IntPtr HeapCreate(uint flOptions, UIntPtr dwInitialSize,UIntPtr dwMaximumSize);
[DllImport("kernel32.dll")]
static extern bool HeapDestroy(IntPtr hHeap);
public static void Main() {
IntPtr theHeap = HeapCreate( 0, (UIntPtr) 4096, UIntPtr.Zero );
HeapDestroy( theHeap );
theHeap = IntPtr.Zero;
}
}</source>

==Demonstrate stackalloc==

<source lang="csharp">using System;

class MainClass {
unsafe public static void Main() {
int* ptrs = stackalloc int[3];

ptrs[0] = 1;
ptrs[1] = 2;
ptrs[2] = 3;

for(int i=0; i < 3; i++)
Console.WriteLine(ptrs[i]);
}
}</source>
<pre class=codeResult>1
2
3</pre>

==Free Memory==

<source lang="csharp">using System;
using System.IO;
using System.Reflection;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
public class MainClass
{
public static void Main()
{
IntPtr ptr = Marshal.AllocHGlobal(1024);
GC.AddMemoryPressure(1024);
if (ptr != IntPtr.Zero) {
Marshal.FreeHGlobal(ptr);
ptr = IntPtr.Zero;
GC.RemoveMemoryPressure(1024);
}
}
}</source>

==Free memory: Marshal.FreeHGlobal==

<source lang="csharp">using System;
using System.IO;
using System.Reflection;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
public class MainClass
{
public static void Main()
{
IntPtr ptr = Marshal.AllocHGlobal(1024);
if (ptr != IntPtr.Zero){
Marshal.FreeHGlobal(ptr);
ptr = IntPtr.Zero;
}
}
}</source>

← Предыдущая	Версия 15:31, 26 мая 2010
(нет различий)

Csharp/CSharp Tutorial/Windows/Memory - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия