xref: /xnu-10002.81.5/osfmk/man/ledger_create.html (revision 5e3eaea39dcf651e66cb99ba7d70e32cc4a99587)
1*5e3eaea3SApple OSS Distributions<h2>ledger_create</h2>
2*5e3eaea3SApple OSS Distributions<hr>
3*5e3eaea3SApple OSS Distributions<p>
4*5e3eaea3SApple OSS Distributions<strong>Function</strong> - Create a subordinate ledger.
5*5e3eaea3SApple OSS Distributions<h3>SYNOPSIS</h3>
6*5e3eaea3SApple OSS Distributions<pre>
7*5e3eaea3SApple OSS Distributions<strong>kern_return_t   ledger_create</strong>
8*5e3eaea3SApple OSS Distributions                <strong>(ledger_port_t</strong>                    <var>parent_ledger</var>,
9*5e3eaea3SApple OSS Distributions                 <strong>ledger_port_t</strong>                    <var>ledger_ledger</var>,
10*5e3eaea3SApple OSS Distributions                 <strong>ledger_port_t</strong>                     <var>child_ledger</var>,
11*5e3eaea3SApple OSS Distributions                 <strong>ledger_item_t</strong>                         <var>transfer</var><strong>);</strong>
12*5e3eaea3SApple OSS Distributions</pre>
13*5e3eaea3SApple OSS Distributions<h3>PARAMETERS</h3>
14*5e3eaea3SApple OSS Distributions<dl>
15*5e3eaea3SApple OSS Distributions<p>
16*5e3eaea3SApple OSS Distributions<dt> <var>parent_ledger</var>
17*5e3eaea3SApple OSS Distributions<dd>
18*5e3eaea3SApple OSS Distributions[in ledger send right]
19*5e3eaea3SApple OSS DistributionsThe parent ledger.
20*5e3eaea3SApple OSS Distributions<p>
21*5e3eaea3SApple OSS Distributions<dt> <var>ledger_ledger</var>
22*5e3eaea3SApple OSS Distributions<dd>
23*5e3eaea3SApple OSS Distributions[in ledger send right]
24*5e3eaea3SApple OSS DistributionsThe wired kernel memory ledger providing the
25*5e3eaea3SApple OSS Distributionsspace from which the ledger itself is drawn.
26*5e3eaea3SApple OSS Distributions<p>
27*5e3eaea3SApple OSS Distributions<dt> <var>child_ledger</var>
28*5e3eaea3SApple OSS Distributions<dd>
29*5e3eaea3SApple OSS Distributions[out ledger send right]
30*5e3eaea3SApple OSS DistributionsThe new child ledger, of the same resource type
31*5e3eaea3SApple OSS Distributionsas the parent ledger.
32*5e3eaea3SApple OSS Distributions<p>
33*5e3eaea3SApple OSS Distributions<dt> <var>transfer</var>
34*5e3eaea3SApple OSS Distributions<dd>
35*5e3eaea3SApple OSS Distributions[in scalar]
36*5e3eaea3SApple OSS DistributionsThe resource amount to transfer to the new ledger.
37*5e3eaea3SApple OSS Distributions</dl>
38*5e3eaea3SApple OSS Distributions<h3>DESCRIPTION</h3>
39*5e3eaea3SApple OSS Distributions<p>
40*5e3eaea3SApple OSS DistributionsThe <strong>ledger_create</strong> function creates a subordinate ledger.
41*5e3eaea3SApple OSS DistributionsResource limits can be
42*5e3eaea3SApple OSS Distributionstransferred from the parent ledger.  The child ledger itself
43*5e3eaea3SApple OSS Distributionsis accounted against
44*5e3eaea3SApple OSS Distributionsthe <var>ledger_ledger</var>.  A new ledger inherits the remote service port.
45*5e3eaea3SApple OSS Distributions<h3>NOTES</h3>
46*5e3eaea3SApple OSS Distributions<p>
47*5e3eaea3SApple OSS DistributionsThis interface is not implemented in OSF/1 R1.3.
48*5e3eaea3SApple OSS Distributions<p>
49*5e3eaea3SApple OSS DistributionsA ledger limit of <strong>LEDGER_ITEM_INFINITE</strong> allows any amount (even
50*5e3eaea3SApple OSS Distributionsinfinity) to be withdrawn.  The root ledger has such a limit.
51*5e3eaea3SApple OSS Distributions<h3>RETURN VALUES</h3>
52*5e3eaea3SApple OSS Distributions<dl>
53*5e3eaea3SApple OSS Distributions<p>
54*5e3eaea3SApple OSS Distributions<dt> <strong>KERN_RESOURCE_SHORTAGE</strong>
55*5e3eaea3SApple OSS Distributions<dd>
56*5e3eaea3SApple OSS DistributionsTransferring the resources would cause the parent ledger to exceed its
57*5e3eaea3SApple OSS Distributionslimits.
58*5e3eaea3SApple OSS Distributions<p>
59*5e3eaea3SApple OSS Distributions<dt> <strong>KERN_INVALID_LEDGER</strong>
60*5e3eaea3SApple OSS Distributions<dd>
61*5e3eaea3SApple OSS Distributions<var>ledger_ledger</var> is not a wired kernel memory ledger.
62*5e3eaea3SApple OSS Distributions</dl>
63*5e3eaea3SApple OSS Distributions<h3>RELATED INFORMATION</h3>
64*5e3eaea3SApple OSS Distributions<p>
65*5e3eaea3SApple OSS DistributionsFunctions:
66*5e3eaea3SApple OSS Distributions<a href="ledger_transfer.html"><strong>ledger_transfer</strong></a>,
67*5e3eaea3SApple OSS Distributions<a href="ledger_terminate.html"><strong>ledger_terminate</strong></a>,
68*5e3eaea3SApple OSS Distributions<a href="ledger_read.html"><strong>ledger_read</strong></a>,
69*5e3eaea3SApple OSS Distributions<a href="ledger_set_remote.html"><strong>ledger_set_remote</strong></a>.
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