| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| <html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> |
| <title>SGL: SkRefCnt.h Source File</title> |
| <link href="doxygen.css" rel="stylesheet" type="text/css"> |
| </head><body> |
| <!-- Generated by Doxygen 1.4.0 --> |
| <div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="annotated.html">Class List</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Class Members</a> | <a class="qindex" href="globals.html">File Members</a></div> |
| <div class="nav"> |
| <a class="el" href="dir_000000.html">include</a> / <a class="el" href="dir_000001.html">skia</a></div> |
| <h1>SkRefCnt.h</h1><div class="fragment"><pre class="fragment">00001 <span class="preprocessor">#ifndef SkRefCnt_DEFINED</span> |
| 00002 <span class="preprocessor"></span><span class="preprocessor">#define SkRefCnt_DEFINED</span> |
| 00003 <span class="preprocessor"></span> |
| 00004 <span class="preprocessor">#include "SkTypes.h"</span> |
| 00005 |
| <a name="l00015"></a><a class="code" href="classSkRefCnt.html">00015</a> <span class="keyword">class </span><a class="code" href="classSkRefCnt.html">SkRefCnt</a> { |
| 00016 <span class="keyword">public</span>: |
| <a name="l00019"></a><a class="code" href="classSkRefCnt.html#a0">00019</a> <a class="code" href="classSkRefCnt.html#a0">SkRefCnt</a>() : fRefCnt(1) {} |
| <a name="l00022"></a><a class="code" href="classSkRefCnt.html#a1">00022</a> <span class="keyword">virtual</span> <a class="code" href="classSkRefCnt.html#a1">~SkRefCnt</a>() { SkASSERT(fRefCnt == 1); } |
| 00023 |
| <a name="l00026"></a><a class="code" href="classSkRefCnt.html#a2">00026</a> <span class="keywordtype">int</span> <a class="code" href="classSkRefCnt.html#a2">getRefCnt</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> fRefCnt; } |
| <a name="l00029"></a><a class="code" href="classSkRefCnt.html#a3">00029</a> <span class="keywordtype">void</span> <a class="code" href="classSkRefCnt.html#a3">ref</a>()<span class="keyword"> const </span>{ SkASSERT(fRefCnt > 0); ++fRefCnt; } |
| <a name="l00034"></a><a class="code" href="classSkRefCnt.html#a4">00034</a> <span class="keywordtype">void</span> <a class="code" href="classSkRefCnt.html#a4">unref</a>()<span class="keyword"> const</span> |
| 00035 <span class="keyword"> </span>{ |
| 00036 SkASSERT(fRefCnt > 0); |
| 00037 <span class="keywordflow">if</span> (fRefCnt == 1) |
| 00038 <span class="keyword">delete</span> <span class="keyword">this</span>; |
| 00039 <span class="keywordflow">else</span> |
| 00040 --fRefCnt; |
| 00041 } |
| 00042 |
| <a name="l00046"></a><a class="code" href="classSkRefCnt.html#a5">00046</a> <span class="keywordtype">void</span> <a class="code" href="classSkRefCnt.html#a5">safeRef</a>()<span class="keyword"> const </span>{ <span class="keywordflow">if</span> (<span class="keyword">this</span>) this-><a class="code" href="classSkRefCnt.html#a3">ref</a>(); } |
| <a name="l00050"></a><a class="code" href="classSkRefCnt.html#a6">00050</a> <span class="keywordtype">void</span> <a class="code" href="classSkRefCnt.html#a6">safeUnref</a>()<span class="keyword"> const </span>{ <span class="keywordflow">if</span> (<span class="keyword">this</span>) this-><a class="code" href="classSkRefCnt.html#a4">unref</a>(); } |
| 00051 |
| 00052 <span class="keyword">private</span>: |
| 00053 <span class="keyword">mutable</span> <span class="keywordtype">int</span> fRefCnt; |
| 00054 }; |
| 00055 |
| <a name="l00061"></a><a class="code" href="classSkAutoUnref.html">00061</a> <span class="keyword">class </span><a class="code" href="classSkAutoUnref.html">SkAutoUnref</a> { |
| 00062 <span class="keyword">public</span>: |
| 00063 <a class="code" href="classSkAutoUnref.html">SkAutoUnref</a>(<a class="code" href="classSkRefCnt.html">SkRefCnt</a>* obj) : fObj(obj) {} |
| 00064 ~<a class="code" href="classSkAutoUnref.html">SkAutoUnref</a>(); |
| 00065 |
| 00066 <a class="code" href="classSkRefCnt.html">SkRefCnt</a>* get()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> fObj; } |
| 00067 <span class="keywordtype">bool</span> ref(); |
| 00068 <span class="keywordtype">bool</span> unref(); |
| 00069 <a class="code" href="classSkRefCnt.html">SkRefCnt</a>* detach(); |
| 00070 |
| 00071 <span class="keyword">private</span>: |
| 00072 <a class="code" href="classSkRefCnt.html">SkRefCnt</a>* fObj; |
| 00073 }; |
| 00074 |
| 00079 <span class="preprocessor">#define SkRefCnt_SafeAssign(dst, src) \</span> |
| 00080 <span class="preprocessor"> do { \</span> |
| 00081 <span class="preprocessor"> if (src) src->ref(); \</span> |
| 00082 <span class="preprocessor"> if (dst) dst->unref(); \</span> |
| 00083 <span class="preprocessor"> dst = src; \</span> |
| 00084 <span class="preprocessor"> } while (0)</span> |
| 00085 <span class="preprocessor"></span> |
| 00086 <span class="preprocessor">#endif</span> |
| 00087 <span class="preprocessor"></span> |
| </pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue May 9 14:35:23 2006 for SGL by |
| <a href="http://www.doxygen.org/index.html"> |
| <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.0 </small></address> |
| </body> |
| </html> |
