osfmk/man/vm_region_basic_info.html

   1 <h2>vm_region_basic_info</h2>
<hr>
<p>
<strong>Structure</strong> - Defines the attributes of a task's memory region.
<h3>SYNOPSIS</h3>
<pre>
<strong>struct vm_region_basic_info</strong>
<strong>{</strong>
       <strong>vm_prot_t</strong>             <var>protection</var><strong>;</strong>
       <strong>vm_prot_t</strong>         <var>max_protection</var><strong>;</strong>
       <strong>vm_inherit_t</strong>         <var>inheritance</var><strong>;</strong>
       <strong>boolean_t</strong>                 <var>shared</var><strong>;</strong>
       <strong>boolean_t</strong>               <var>reserved</var><strong>;</strong>
       <strong>vm_offset_t</strong>               <var>offset</var><strong>;</strong>
       <strong>vm_behavior_t</strong>           <var>behavior</var><strong>;</strong>
       <strong>unsigned short</strong>  <var>user_wired_count</var><strong>;</strong>
<strong>};</strong>

<strong>typedef struct vm_region_basic_info* vm_region_basic_info_t;</strong>
</pre>
<h3>FIELDS</h3>
<dl>
<dt> <var>protection</var>
<dd>
The current protection for the region.
<p>
<dt> <var>max_protection</var>
<dd>
The maximum protection allowed for the region.
<p>
<dt> <var>inheritance</var>
<dd>
The inheritance attribute for the region.
<p>
<dt> <var>shared</var>
<dd>
Shared indicator.  If true, the region is shared by another task.  If false, 
the region is not shared.
<p>
<dt> <var>reserved</var>
<dd>
If true the region is protected from random allocation.
<p>
<dt> <var>offset</var>
<dd>
The region's offset into the memory object.  The region begins at this 
offset.
<p>
<dt> <var>behavior</var>
<dd>
Expected reference pattern for the memory.  Valid values are:
<dl>
<p>
<dt> <strong>VM_BEHAVIOR_DEFAULT</strong>
<dd>
The system's default behavior.
<p>
<dt> <strong>VM_BEHAVIOR_RANDOM</strong>
<dd>
No particular order expected.
<p>
<dt> <strong>VM_BEHAVIOR_SEQUENTIAL</strong>
<dd>
Forward sequential order.
<p>
<dt> <strong>VM_BEHAVIOR_RSEQNTL</strong>
<dd>
Reverse sequential order.
</dl>
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>vm_region_basic_info</strong> structure defines the attributes
of a memory region returned by <strong>vm_region</strong>.
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="vm_region.html"><strong>vm_region</strong></a>,
<a href="vm_inherit.html"><strong>vm_inherit</strong></a>,
<a href="vm_protect.html"><strong>vm_protect</strong></a>.