xnu-792.6.76.tar.gz

[apple/xnu.git] / osfmk / man / MO_get_attributes.html

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-<h2>memory_object_get_attributes</h2>\r<hr>\r<p>\r<strong>Function</strong> - Return current attributes for a memory object.\r<h3>SYNOPSIS</h3>\r<pre>\r<strong>kern_return_t   memory_object_get_attributes</strong>\r                <strong>(memory_object_control_t</strong>         <var>memory_control</var>,\r                 <strong>memory_object_flavor_t</strong>                  <var>flavor</var>,\r                 <strong>memory_object_info_t</strong>                <var>attributes</var>,\r                 <strong>mach_msg_type_number_t</strong>        <var>attributes_count</var><strong>);</strong>\r</pre>\r<h3>PARAMETERS</h3>\r<dl>\r<p>\r<dt> <var>memory_control</var> \r<dd>\r[in memory-cache-control send right]\rThe memory cache control port \rto be used by the memory manager for cache management requests. \rThis port is provided by the kernel in a <strong>memory_object_notify</strong> call.\r<p>\r<dt> <var>flavor</var> \r<dd>\r[in scalar]\rThe type of information to be returned.  Valid values are:\r<dl>\r<p>\r<dt> <strong>MEMORY_OBJECT_PERFORMANCE_INFO</strong>\r<dd>\rPerformance related attributes such as the cache indicator and \rthe cluster size.  <var>attributes</var> should specify a structure of type \r<strong>memory_object_perf_info</strong>.\r<p>\r<dt> <strong>MEMORY_OBJECT_BEHAVIOR_INFO</strong>\r<dd>\rBehavior related attributes such as the copy strategy and sync \rinvalidate flag.  <var>attributes</var> should specify a structure of type \r<strong>memory_object_behavior_info</strong>.\r     <dt> <strong>MEMORY_OBJECT_ATTRIBUTES_INFO</strong>\r<dd>\rBehavior and performance related attributes such as the copy strategy,\rcache indicator, and cluster size.  <var>attributes</var> should specify a structure of type \r<strong>memory_object_attr_info</strong>.\r</dl>\r<p>\r<dt> <var>attributes</var> \r<dd>\r[out structure]\rCurrent attributes.\r<p>\r<dt> <var>attributes_count</var> \r<dd>\r[in/out scalar]\rOn input, the maximum size of the buffer; on output, the \rsize returned (in natural-sized units).\r</dl>\r<h3>DESCRIPTION</h3>\r<p>\rThe <strong>memory_object_get_attributes</strong> function retrieves\rthe current attributes for \rthe specified memory object.\r<h3>RETURN VALUES</h3>\r<p>\rOnly generic errors apply.\r<h3>RELATED INFORMATION</h3>\r<p>\rFunctions:\r<a href="MO_change_attributes.html"><strong>memory_object_change_attributes</strong></a>.\r<p>\rData Structures:\r<a href="memory_object_perf_info.html"><strong>memory_object_perf_info</strong></a>,\r<a href="memory_object_attr_info.html"><strong>memory_object_attr_info</strong></a>.\r
\ No newline at end of file
+<h2>memory_object_get_attributes</h2>
+<hr>
+<p>
+<strong>Function</strong> - Return current attributes for a memory object.
+<h3>SYNOPSIS</h3>
+<pre>
+<strong>kern_return_t   memory_object_get_attributes</strong>
+                <strong>(memory_object_control_t</strong>         <var>memory_control</var>,
+                 <strong>memory_object_flavor_t</strong>                  <var>flavor</var>,
+                 <strong>memory_object_info_t</strong>                <var>attributes</var>,
+                 <strong>mach_msg_type_number_t</strong>        <var>attributes_count</var><strong>);</strong>
+</pre>
+<h3>PARAMETERS</h3>
+<dl>
+<p>
+<dt> <var>memory_control</var> 
+<dd>
+[in memory-cache-control send right]
+The memory cache control port 
+to be used by the memory manager for cache management requests. 
+This port is provided by the kernel in a <strong>memory_object_notify</strong> call.
+<p>
+<dt> <var>flavor</var> 
+<dd>
+[in scalar]
+The type of information to be returned.  Valid values are:
+<dl>
+<p>
+<dt> <strong>MEMORY_OBJECT_PERFORMANCE_INFO</strong>
+<dd>
+Performance related attributes such as the cache indicator and 
+the cluster size.  <var>attributes</var> should specify a structure of type 
+<strong>memory_object_perf_info</strong>.
+<p>
+<dt> <strong>MEMORY_OBJECT_BEHAVIOR_INFO</strong>
+<dd>
+Behavior related attributes such as the copy strategy and sync 
+invalidate flag.  <var>attributes</var> should specify a structure of type 
+<strong>memory_object_behavior_info</strong>.
+     <dt> <strong>MEMORY_OBJECT_ATTRIBUTES_INFO</strong>
+<dd>
+Behavior and performance related attributes such as the copy strategy,
+cache indicator, and cluster size.  <var>attributes</var> should specify a structure of type 
+<strong>memory_object_attr_info</strong>.
+</dl>
+<p>
+<dt> <var>attributes</var> 
+<dd>
+[out structure]
+Current attributes.
+<p>
+<dt> <var>attributes_count</var> 
+<dd>
+[in/out scalar]
+On input, the maximum size of the buffer; on output, the 
+size returned (in natural-sized units).
+</dl>
+<h3>DESCRIPTION</h3>
+<p>
+The <strong>memory_object_get_attributes</strong> function retrieves
+the current attributes for 
+the specified memory object.
+<h3>RETURN VALUES</h3>
+<p>
+Only generic errors apply.
+<h3>RELATED INFORMATION</h3>
+<p>
+Functions:
+<a href="MO_change_attributes.html"><strong>memory_object_change_attributes</strong></a>.
+<p>
+Data Structures:
+<a href="memory_object_perf_info.html"><strong>memory_object_perf_info</strong></a>,
+<a href="memory_object_attr_info.html"><strong>memory_object_attr_info</strong></a>.