在Symbian应用程序中增加堆的大小

Increase the heap size of an application

The default heap size of an application is 1MB, that means on target if you application tried to allocate more than 1MB memory, the allocation will fail. Probably new (ELeave) will leave.

What if you really want your application to allcoate more than 1MB memory? For example, you are developing an image processing application which needs to load big pictures.

There's a way  to use a user define heap instead of the default heap, you can do this like:

GLDEF_C TInt E32Main()
 {
     RHeap *heap = UserHeap::ChunkHeap( NULL, 1024 * 4, 1024 * 1024 * 2 );    // 2MB
     if( heap )
     {
         User::SwitchHeap( heap );
     }
     TInt ret  =  EikStart::RunApplication( NewApplication );
     if ( heap )
     {
      heap->Close();
     }  
     return ret;
 }

You switch the heap to your own one, which allow you to allocate 2MB in this case.

对于本文的一些评论：

• 1.chenziteng
•  
• I bet .mmp file is a better place to specify the max heap size for an application, google EPOCHEAPSIZE for more details.
• 2007-6-20 23:29:10

• 2.Jimmy
•  
• Yes, use EPOCHEAPSIZE in the .mmp file makes sense, but it's only for target, in emulator, it seems it doesn't work. Thanks.
• 2007-6-21 9:31:49

转载自：http://www.symbian.net.cn/blog/post/16.html