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75 lines
2.2 KiB
HTML
75 lines
2.2 KiB
HTML
<h2>mach_port_allocate_subsystem</h2>
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<hr>
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<p>
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<strong>Function</strong> - Create a port right associated with the caller-specified subsystem.
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<h3>SYNOPSIS</h3>
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<pre>
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<strong>kern_return_t mach_port_allocate_subsystem</strong>
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<strong>(ipc_space_t</strong> <var>task</var>,
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<strong>subsystem_t</strong> <var>subsys</var>,
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<strong>mach_port_name_t</strong> <var>mach_port_name_t</var><strong>);</strong>
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</pre>
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<h3>PARAMETERS</h3>
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<dl>
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<p>
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<dt> <var>task</var>
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<dd>
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[in task send right] The task acquiring the port right.
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<p>
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<dt> <var>subsys</var>
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<dd>
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[in scalar] The port right naming the subsystem the newly created port
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is to be associated with.
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<p>
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<dt> <var>name</var>
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<dd>
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[out scalar] The task's name for the port right. This can be any name
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that wasn't in use.
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</dl>
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<h3>DESCRIPTION</h3>
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<p>
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The <strong>mach_port_allocate_subsystem</strong> function creates a new right
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and associates it
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with the specifed subsystem (specified via the <var>subsys</var> parameter)
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previously registered via a call to the
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<strong>mach_subsystem_create</strong> interface.
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The new right's name is returned in the <var>name</var> parameter. The
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association of this port with the subsystem is immutable for the
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life of the port.
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<p>
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Any RPC targeted at the new port will cause the kernel glue-code
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to locate the server function address and argument signature in the
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associated subsystem.
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<h3>NOTES</h3>
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<p>
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This interface is machine word length specific because of the port
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name parameter.
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<h3>RETURN VALUES</h3>
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<dl>
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<p>
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<dt> <strong>KERN_SUCCESS</strong>
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<dd>
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The right is allocated.
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<p>
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<dt> <strong>KERN_INVALID_TASK</strong>
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<dd>
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The space is null.
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<p>
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<dt> <strong>KERN_INVALID_TASK</strong>
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<dd>
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The space is dead.
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<p>
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<dt> <strong>KERN_RESOURCE_SHORTAGE</strong>
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<dd>
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Couldn't allocate memory.
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<p>
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<dt> <strong>KERN_NO_SPACE</strong>
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<dd>
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No room in space for another right.
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</dl>
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<h3>RELATED INFORMATION</h3>
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<p>
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Functions:
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<a href="mach_subsystem_create.html"><strong>mach_subsystem_create</strong></a>,
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<a href="thread_activation_create.html"><strong>thread_activation_create</strong></a>.
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