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+ <title>hash_load_check_resize_trigger Interface</title>
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+ <div id="page">
+ <h1><tt>hash_load_check_resize_trigger</tt> Interface</h1>
+
+ <p>A resize trigger policy based on a load check. It keeps the
+ load factor between some load factors load_min and
+ load_max.</p>
+
+ <p>Defined in: <a href=
+ "http://gcc.gnu.org/viewcvs/*checkout*/trunk/libstdc%2B%2B-v3/include/ext/pb_ds/hash_policy.hpp"><tt>hash_policy.hpp</tt></a></p>
+
+ <h2><a name="link1" id="link1">Template Parameters</a></h2>
+
+ <table class="c1" width="100%" border="1" summary=
+ "Template Parameters">
+ <tr>
+ <td width="20%" align="left"><b>Parameter</b></td>
+
+ <td width="50%" align="left"><b>Description</b></td>
+
+ <td width="30%" align="left"><b>Default Value</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<a name="External_Load_Access1313998607" id=
+"External_Load_Access1313998607"><b>bool</b> External_Load_Access </a>
+</pre>
+ </td>
+
+ <td>
+ <p>Specifies whether the load factor can be accessed
+ externally. The two options have different trade-offs in
+ terms of flexibility, genericity, and encapsulation.</p>
+ </td>
+
+ <td><tt><b>false</b></tt></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<a name="Size_Type42920436" id=
+"Size_Type42920436"><b>typename</b> Size_Type </a>
+</pre>
+ </td>
+
+ <td>
+ <p>Size type.</p>
+ </td>
+
+ <td>size_t</td>
+ </tr>
+ </table>
+
+ <h2><a name="link2" id="link2">Public Types and
+ Constants</a></h2>
+
+ <h3><a name="link3" id="link3">General Definitions</a></h3>
+
+ <table class="c1" width="100%" border="1" summary="Types">
+ <tr>
+ <td width="30%" align="left"><b>Type</b></td>
+
+ <td width="55%" align="left"><b>Definition</b></td>
+
+ <td width="15%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<a name="size_type55424436" id="size_type55424436">size_type</a>
+</pre>
+ </td>
+
+ <td>
+ <pre>
+<a href="#Size_Type42920436"><tt>Size_Type</tt></a>
+</pre>
+ </td>
+
+ <td>
+ <p>Size type.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<a name="external_load_access3976598639" id=
+"external_load_access3976598639">external_load_access</a>
+</pre>
+ </td>
+
+ <td>
+ <pre>
+<a href=
+"#External_Load_Access1313998607"><tt>External_Load_Access</tt></a>
+</pre>
+ </td>
+
+ <td>
+ <p>Indicates whether loads can be accessed externally</p>
+ </td>
+ </tr>
+ </table>
+
+ <h2><a name="link4" id="link4">Public Methods</a></h2>
+
+ <h3><a name="link5" id="link5">Constructors, Destructor, and
+ Related</a></h3>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+ hash_load_check_resize_trigger
+ (float load_min = 0.125,
+ float load_max = 0.5)
+</pre>
+ </td>
+
+ <td>
+ <p>Default constructor, or constructor taking
+ <span class="c1"><tt>load_min</tt></span> and
+ <span class="c1"><tt>load_max</tt></span> load factors
+ between which this policy will keep the actual load.</p>
+
+ <p>It is the responsibility of the user to ensure that
+ <span class="c1"><tt>load_min</tt></span> is smaller than
+ <span class="c1"><tt>load_max</tt></span>.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>void</b>
+ swap
+ (<span class=
+"c2"><tt>hash_load_check_resize_trigger</tt></span> &other)
+</pre>
+ </td>
+
+ <td>
+ <p>Swaps content.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+ <b>virtual</b>
+ ~hash_load_check_resize_trigger
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Destructor.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h3><a name="link6" id="link6">Load Access Methods</a></h3>
+
+ <p>These methods are only available if the external access
+ parameter is set.</p>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> std::pair<float, float>
+ get_loads
+ () <b>const</b>
+</pre>
+ </td>
+
+ <td>
+ <p>Returns a pair of the minimal and maximal loads,
+ respectively.</p>
+
+ <p>Calling this method will not compile when <a href=
+ "#External_Load_Access1313998607"><tt>External_Load_Access</tt></a>
+ == <tt><b>false</b></tt>.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>void</b>
+ set_loads
+ (std::pair<float, float> load_pair)
+</pre>
+ </td>
+
+ <td>
+ <p>Sets the loads through a pair of the minimal and
+ maximal loads, respectively.</p>
+
+ <p>Calling this method resizes the container, and might
+ throw an exception. It is the responsibility of the user
+ to pass appropriate loads to this function. Calling this
+ method will not compile when <a href=
+ "#External_Load_Access1313998607"><tt>External_Load_Access</tt></a>
+ == <tt><b>false</b></tt>.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h2><a name="link7" id="link7">Protected Methods</a></h2>
+
+ <h3><a name="link8" id="link8">Insert Search
+ Notifications.</a></h3>
+
+ <p>Notifications called during an insert operation.</p>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_insert_search_start
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search started.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_insert_search_collision
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search encountered a collision.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_insert_search_end
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search ended.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h3><a name="link9" id="link9">Find Search
+ Notifications.</a></h3>
+
+ <p>Notifications called during a find operation.</p>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_find_search_start
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search started.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_find_search_collision
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search encountered a collision.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_find_search_end
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search ended.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h3><a name="link10" id="link10">Erase Search
+ Notifications.</a></h3>
+
+ <p>Notifications called during an insert operation.</p>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_erase_search_start
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search started.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_erase_search_collision
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search encountered a collision.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_erase_search_end
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies a search ended.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h3><a name="link11" id="link11">Content Change
+ Notifications.</a></h3>
+
+ <p>Notifications called when the content of the table changes
+ in a way that can affect the resize policy.</p>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_inserted
+ (<a href="#size_type55424436"><tt>size_type</tt></a> num_entries)
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies an element was inserted. the total number of
+ entries in the table is <span class=
+ "c1"><tt>num_entries</tt></span>.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>void</b>
+ notify_erased
+ (<a href="#size_type55424436"><tt>size_type</tt></a> num_entries)
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies an element was erased.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>void</b>
+ notify_cleared
+ ()
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies the table was cleared.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h3><a name="link12" id="link12">Size Change
+ Notifications.</a></h3>
+
+ <p>Notifications called when the table changes size.</p>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>void</b>
+ notify_resized
+ (<a href="#size_type55424436"><tt>size_type</tt></a> new_size)
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies the table was resized as a result of this
+ object's signifying that a resize is needed.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>void</b>
+ notify_externally_resized
+ (<a href="#size_type55424436"><tt>size_type</tt></a> new_size)
+</pre>
+ </td>
+
+ <td>
+ <p>Notifies the table was resized externally.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h3><a name="link13" id="link13">Queries</a></h3>
+
+ <p>Called to query whether/how to resize.</p>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>bool</b>
+ is_resize_needed
+ () <b>const</b>
+</pre>
+ </td>
+
+ <td>
+ <p>Queries whether a resize is needed.</p>
+ </td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>inline</b> <b>bool</b>
+ is_grow_needed
+ (<a href="#size_type55424436"><tt>size_type</tt></a> size,
+ <a href=
+"#size_type55424436"><tt>size_type</tt></a> num_entries) <b>const</b>
+</pre>
+ </td>
+
+ <td>
+ <p>Queries whether a grow is needed.</p>
+
+ <p>This method is called only if this object indicated
+ resize is needed. The actual <span class=
+ "c1"><tt>size</tt></span> of the table is <span class=
+ "c1"><tt>size</tt></span>, and the number of entries in
+ it is <span class="c1"><tt>num_entries</tt></span>.</p>
+ </td>
+ </tr>
+ </table>
+
+ <h2><a name="link14" id="link14">Private Methods</a></h2>
+
+ <h3><a name="link15" id="link15">Overrides</a></h3>
+
+ <table class="c1" width="100%" border="1" summary="Methods">
+ <tr>
+ <td width="45%" align="left"><b>Method</b></td>
+
+ <td width="55%" align="left"><b>Description</b></td>
+ </tr>
+
+ <tr>
+ <td>
+ <pre>
+<b>virtual</b> <b>void</b>
+ do_resize
+ (<a href="#size_type55424436"><tt>size_type</tt></a> new_size)
+</pre>
+ </td>
+
+ <td>
+ <p>Resizes to <span class=
+ "c1"><tt>new_size</tt></span>.</p>
+ </td>
+ </tr>
+ </table>
+ </div>
+</body>
+</html>
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