cwp4310.htm
来自「Perst开源实时数据库」· HTM 代码 · 共 79 行
HTM
79 行
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<HTML><HEAD><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><TITLE>Perst.Storage.CreateBitmapAllocator</TITLE><LINK REL=STYLESHEET HREF="../CommentReport.css" TYPE="text/css"></HEAD><BODY topmargin=0 rightmargin=0 leftmargin=0 style="background-image: url(../titletile.jpg); background-repeat:repeat-x; background-position: 0 0;" ><DIV CLASS="PageHeading">Perst.Storage.CreateBitmapAllocator Function</DIV><DIV CLASS="Description">
Create bitmap custom allocator
<P></DIV><IMG src="../GradLeft.jpg" width=7 height=378 alt="" border="0" style="position:absolute; left:10; top:18;z-Index:2"><IMG src="../GradTop.jpg" width=352 height=7 alt="" border="0" align="top" style="position:absolute; left:10; top:18; z-index:1"><DIV CLASS="Remarks"><SPAN CLASS="RemarkHdrX">Public Perst.CustomAllocator CreateBitmapAllocator (int, long, long, long)</SPAN></DIV><TABLE CLASS="InfoTable" cellpadding=0 cellspacing=0><TR height=20><TD width=20> </TD><TD valign=top align=left width=9 bgcolor="#cccc66"><IMG SRC="../graycorner.jpg" align=top></TD><TD CLASS="TableLightLabel" >Type</TD><TD CLASS="TableLightLabel" >Name</TD><TD CLASS="TableLightLabel" >Description</TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc">int</TD><TD CLASS="TableLightDesc">quantum</TD><TD CLASS="TableLightDesc">size in bytes of allocation quantum. Should be power of two.</TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc">long</TD><TD CLASS="TableLightDesc">baseAddr</TD><TD CLASS="TableLightDesc">base address for allocator (it should match offset of multifile segment)</TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc">long</TD><TD CLASS="TableLightDesc">extension</TD><TD CLASS="TableLightDesc">size by which space mapped by allocator is extended each time when
no suitable hole is found in bitmap (it should be large enough to improve allocation speed and locality
of references)</TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc">long</TD><TD CLASS="TableLightDesc">limit</TD><TD CLASS="TableLightDesc">maximal size of memory allocated by this allocator (pass Long.MAX_VALUE if you do not
want to limit space)</TD><TD width=20> </TD></TR></TABLE><TABLE CLASS="InfoTable" cellpadding=0 cellspacing=0><TR height=20><TD width=20> </TD><TD valign=top align=left width=9 bgcolor="#cccc66"><IMG SRC="../graycorner.jpg" align=top></TD><TD CLASS="TableLightLabel" WIDTH=206>Return</TD><TD CLASS="TableLightLabel" >Description</TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP1012.HTM">CustomAllocator</A></TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"> </TD><TD width=20> </TD></TR></TABLE></BODY></HTML>⌨️ 快捷键说明
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