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Mode: C++ -*- */</span></div> +<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div> +<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#ifndef __ICPTRHOLDER_H__</span></div> +<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"></span><span class="preprocessor">#define __ICPTRHOLDER_H__</span></div> +<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor"></span></div> +<div class="line"><a name="l00042"></a><span class="lineno"><a class="code" href="classICPointerHolder.html"> 42</a></span> <span class="keyword">template</span><<span class="keyword">class</span> T> <span class="keyword">class </span><a class="code" href="classICPointerHolder.html">ICPointerHolder</a> {</div> +<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">public</span>:</div> +<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <a class="code" href="classICPointerHolder.html">ICPointerHolder</a>() { ptr = NULL; }</div> +<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <a class="code" href="classICPointerHolder.html">ICPointerHolder</a>(T* p) { ptr = p; }</div> +<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div> +<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// copy constructor to support assignment</span></div> +<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="classICPointerHolder.html">ICPointerHolder</a>(<span class="keyword">const</span> <a class="code" href="classICPointerHolder.html">ICPointerHolder</a>& ip) {</div> +<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  ptr = ip.ptr;</div> +<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div> +<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">// We need to transfer ownership of ptr to this object by setting</span></div> +<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// ip's ptr to null. Otherwise, ptr will de deleted twice.</span></div> +<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="comment">// const ugliness requires us to do the const_cast.</span></div> +<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="classICPointerHolder.html">ICPointerHolder</a> *ipp = <span class="keyword">const_cast<</span><a class="code" href="classICPointerHolder.html">ICPointerHolder</a>*<span class="keyword">></span>(&ip);</div> +<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  ipp->ptr = NULL;</div> +<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  };</div> +<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div> +<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  ~<a class="code" href="classICPointerHolder.html">ICPointerHolder</a>() {</div> +<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  release();</div> +<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  }</div> +<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div> +<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="classICPointerHolder.html">ICPointerHolder</a>& operator=(T* p) {</div> +<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  this->release();</div> +<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  ptr = p;</div> +<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div> +<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div> +<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div> +<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="classICPointerHolder.html">ICPointerHolder</a>& operator=(<a class="code" href="classICPointerHolder.html">ICPointerHolder</a>& p) {</div> +<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  this->release();</div> +<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  ptr = p.ptr; <span class="comment">// this transfer ownership of the pointer</span></div> +<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  p.ptr = NULL; <span class="comment">// set it to null so the pointer won't get delete twice.</span></div> +<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div> +<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</div> +<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div> +<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordtype">int</span> operator!=(T* p) {<span class="keywordflow">return</span> (ptr != p);}</div> +<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordtype">int</span> operator==(T* p) {<span class="keywordflow">return</span> (ptr == p);}</div> +<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div> +<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">operator</span> T*() <span class="keyword">const</span> {</div> +<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">return</span> ptr;</div> +<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div> +<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div> +<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  T* operator->()<span class="keyword"> const </span>{</div> +<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  assert(ptr);</div> +<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> ptr;</div> +<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div> +<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div> +<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  T& operator*() {</div> +<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  assert(ptr);</div> +<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> *ptr;</div> +<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  }</div> +<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div> +<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">private</span>:</div> +<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">void</span> release() {</div> +<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (ptr != NULL) {</div> +<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  ptr->detach();</div> +<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">delete</span> ptr;</div> +<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  ptr = NULL;</div> +<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div> +<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  }</div> +<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div> +<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  T* ptr;</div> +<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> };</div> +<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div> +<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#endif</span></div> +</div><!-- fragment --></div><!-- contents --> +<!-- start footer part --> +<hr class="footer"/><address class="footer"><small> +Generated by  <a href="http://www.doxygen.org/index.html"> +<img class="footer" src="doxygen.png" alt="doxygen"/> +</a> 1.8.3.1 +</small></address> +</body> +</html> |