📄 lua移植到mtk平台小结.htm

📁 MTK上实现虚拟机的一种有效方案
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<H1><IMG height=16 alt=原创 src="http://blog.csdn.net/images/authorship.gif" 
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<P class=MsoNormal style="TEXT-INDENT: 21pt"><SPAN lang=EN-US>lua</SPAN><SPAN 
style="FONT-FAMILY: 宋体">内核使用</SPAN><SPAN lang=EN-US>C</SPAN><SPAN 
style="FONT-FAMILY: 宋体">语言，所使用的函数也只有标准</SPAN><SPAN lang=EN-US>C</SPAN><SPAN 
style="FONT-FAMILY: 宋体">，并且没有全局变量。对于大部分操作系统来说，移植所要做的事情很少。而移植到</SPAN><SPAN 
lang=EN-US>MTK</SPAN><SPAN style="FONT-FAMILY: 宋体">平台则要注意以下几点：</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 21pt"><SPAN lang=EN-US><?XML:NAMESPACE 
PREFIX = O /><O:P>&nbsp;</O:P></SPAN></P>
<P class=MsoListParagraph 
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style="FONT: 7pt 'Times New Roman'; font-size-adjust: none; font-stretch: normal">&nbsp; 
</SPAN></SPAN></SPAN>&lt;!--[endif]--&gt;<SPAN 
style="FONT-FAMILY: 宋体">内存分配。</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN lang=EN-US>Lua</SPAN><SPAN 
style="FONT-FAMILY: 宋体">使用</SPAN><SPAN lang=EN-US>malloc</SPAN><SPAN 
style="FONT-FAMILY: 宋体">、</SPAN><SPAN lang=EN-US>realloc</SPAN><SPAN 
style="FONT-FAMILY: 宋体">、</SPAN><SPAN lang=EN-US>calloc</SPAN><SPAN 
style="FONT-FAMILY: 宋体">等函数来分配内存，而</SPAN><SPAN lang=EN-US>MTK</SPAN><SPAN 
style="FONT-FAMILY: 宋体">平台下不能使用这些函数，而是使用</SPAN><SPAN 
lang=EN-US>OslMalloc</SPAN><SPAN 
style="FONT-FAMILY: 宋体">等函数代替之。其它的分配内存函数包括以下：</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN lang=EN-US>#define 
media_get_ext_buffer(src_mod_id, buffer_p, buffer_size)\ </SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
lang=EN-US>media_get_ext_buffer_ext(src_mod_id,buffer_p, 
buffer_size,__FILE__,__LINE__) </SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN lang=EN-US>#define 
media_get_int_buffer(src_mod_id, buffer_p, buffer_size)\ </SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
lang=EN-US>media_get_int_buffer_ext(src_mod_id,buffer_p,buffer_size,__FILE__,__LINE__) 
</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN lang=EN-US>#define 
media_free_int_buffer(src_mod_id, buffer_p)\ </SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
lang=EN-US>media_free_int_buffer_ext(src_mod_id, buffer_p, __FILE__, __LINE__) 
</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN lang=EN-US>#define 
media_free_ext_buffer(src_mod_id, buffer_p)\ </SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
lang=EN-US>media_free_ext_buffer_ext(src_mod_id, buffer_p, __FILE__, 
__LINE__)</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
lang=EN-US>mmi_frm_scrmem_alloc()</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
lang=EN-US><O:P>&nbsp;</O:P></SPAN></P>
<P class=MsoListParagraph 
style="MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt">&lt;!--[if 
!supportLists]--&gt;<SPAN lang=EN-US><SPAN>2．<SPAN 
style="FONT: 7pt 'Times New Roman'; font-size-adjust: none; font-stretch: normal">&nbsp; 
</SPAN></SPAN></SPAN>&lt;!--[endif]--&gt;<SPAN 
style="FONT-FAMILY: 宋体">文件操作。</SPAN></P>
<P class=MsoListParagraph style="MARGIN-LEFT: 18pt; TEXT-INDENT: 0cm"><SPAN 
lang=EN-US>fopne</SPAN><SPAN style="FONT-FAMILY: 宋体">、</SPAN><SPAN 
lang=EN-US>fread</SPAN><SPAN style="FONT-FAMILY: 宋体">、</SPAN><SPAN 
lang=EN-US>fwrite</SPAN><SPAN style="FONT-FAMILY: 宋体">、</SPAN><SPAN 
lang=EN-US>fclose</SPAN><SPAN style="FONT-FAMILY: 宋体">等函数也不要使用，用</SPAN><SPAN 
lang=EN-US>FS_Open</SPAN><SPAN style="FONT-FAMILY: 宋体">、</SPAN><SPAN 
lang=EN-US>FS_Close</SPAN><SPAN style="FONT-FAMILY: 宋体">、</SPAN><SPAN 
lang=EN-US>FS_Read</SPAN><SPAN style="FONT-FAMILY: 宋体">、</SPAN><SPAN 
lang=EN-US>FS_Write</SPAN><SPAN style="FONT-FAMILY: 宋体">等函数代替之。</SPAN></P>
<P class=MsoListParagraph 
style="MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt">&lt;!--[if 
!supportLists]--&gt;<SPAN lang=EN-US><SPAN>3．<SPAN 
style="FONT: 7pt 'Times New Roman'; font-size-adjust: none; font-stretch: normal">&nbsp; 
</SPAN></SPAN></SPAN>&lt;!--[endif]--&gt;<SPAN 
style="FONT-FAMILY: 宋体">消息（事件）传递。</SPAN></P>
<P class=MsoListParagraph style="MARGIN-LEFT: 18pt; TEXT-INDENT: 0cm"><SPAN 
style="FONT-FAMILY: 宋体">手机上的消息要传给</SPAN><SPAN lang=EN-US>lua</SPAN><SPAN 
style="FONT-FAMILY: 宋体">，包括按键消息、</SPAN><SPAN lang=EN-US>timer</SPAN><SPAN 
style="FONT-FAMILY: 宋体">消息、</SPAN><SPAN lang=EN-US>socket</SPAN><SPAN 
style="FONT-FAMILY: 宋体">消息。</SPAN></P>
<P class=MsoListParagraph style="MARGIN-LEFT: 18pt; TEXT-INDENT: 0cm"><SPAN 
lang=EN-US><O:P>&nbsp; 
<DIV class=highlighter>
<OL class=highlighter-cpp>
  <LI><SPAN class=datatypes>int</SPAN><SPAN>&nbsp;(*func)(</SPAN><SPAN 
  class=keyword>void</SPAN><SPAN>&nbsp;*pthis,</SPAN><SPAN 
  class=datatypes>int</SPAN><SPAN>&nbsp;evtType,&nbsp;</SPAN><SPAN 
  class=datatypes>UINT32</SPAN><SPAN>&nbsp;param1,&nbsp;</SPAN><SPAN 
  class=datatypes>UINT32</SPAN><SPAN>&nbsp;param2);</SPAN>
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