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1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd"> | |
4 | <refentry id="glWaitSync"> | |
5 | <refmeta> | |
6 | <refmetainfo> | |
7 | <copyright> | |
8 | <year>2010</year> | |
9 | <holder>Khronos Group</holder> | |
10 | </copyright> | |
11 | </refmetainfo> | |
12 | <refentrytitle>glWaitSync</refentrytitle> | |
13 | <manvolnum>3G</manvolnum> | |
14 | </refmeta> | |
15 | <refnamediv> | |
16 | <refname>glWaitSync</refname> | |
17 | <refpurpose>instruct the GL server to block until the specified sync object becomes signaled</refpurpose> | |
18 | </refnamediv> | |
19 | <refsynopsisdiv><title>C Specification</title> | |
20 | <funcsynopsis> | |
21 | <funcprototype> | |
22 | <funcdef>void <function>glWaitSync</function></funcdef> | |
23 | <paramdef>GLsync <parameter>sync</parameter></paramdef> | |
24 | <paramdef>GLbitfield <parameter>flags</parameter></paramdef> | |
25 | <paramdef>GLuint64 <parameter>timeout</parameter></paramdef> | |
26 | </funcprototype> | |
27 | </funcsynopsis> | |
28 | </refsynopsisdiv> | |
29 | <refsect1 id="parameters"><title>Parameters</title> | |
30 | <variablelist> | |
31 | <varlistentry> | |
32 | <term><parameter>sync</parameter></term> | |
33 | <listitem> | |
34 | <para> | |
35 | Specifies the sync object whose status to wait on. | |
36 | </para> | |
37 | </listitem> | |
38 | </varlistentry> | |
39 | <varlistentry> | |
40 | <term><parameter>flags</parameter></term> | |
41 | <listitem> | |
42 | <para> | |
43 | A bitfield controlling the command flushing behavior. <parameter>flags</parameter> may be zero. | |
44 | </para> | |
45 | </listitem> | |
46 | </varlistentry> | |
47 | <varlistentry> | |
48 | <term><parameter>timeout</parameter></term> | |
49 | <listitem> | |
50 | <para> | |
51 | Specifies the timeout that the server should wait before continuing. <parameter>timeout</parameter> must be <constant>GL_TIMEOUT_IGNORED</constant>. | |
52 | </para> | |
53 | </listitem> | |
54 | </varlistentry> | |
55 | </variablelist> | |
56 | </refsect1> | |
57 | <refsect1 id="description"><title>Description</title> | |
58 | <para> | |
59 | <function>glWaitSync</function> causes the GL server to block and wait until <parameter>sync</parameter> becomes signaled. <parameter>sync</parameter> | |
60 | is the name of an existing sync object upon which to wait. <parameter>flags</parameter> and <parameter>timeout</parameter> are currently not used and | |
61 | must be set to zero and the special value <constant>GL_TIMEOUT_IGNORED</constant>, respectively<footnote><para><parameter>flags</parameter> and | |
62 | <parameter>timeout</parameter> are placeholders for anticipated future extensions of sync object capabilities. They must have these reserved values in | |
63 | order that existing code calling <function>glWaitSync</function> operate properly in the presence of such extensions.</para></footnote>. <function>glWaitSync</function> will always wait no longer than an implementation-dependent timeout. The | |
64 | duration of this timeout in nanoseconds may be queried by calling <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with the | |
65 | parameter <constant>GL_MAX_SERVER_WAIT_TIMEOUT</constant>. There is currently no way to determine whether <function>glWaitSync</function> unblocked | |
66 | because the timeout expired or because the sync object being waited on was signaled. | |
67 | </para> | |
68 | <para> | |
69 | If an error occurs, <function>glWaitSync</function> does not cause the GL server to block. | |
70 | </para> | |
71 | </refsect1> | |
72 | <refsect1 id="notes"><title>Notes</title> | |
73 | <para> | |
74 | <function>glWaitSync</function> is available only if the GL version is 3.2 or higher. | |
75 | </para> | |
76 | </refsect1> | |
77 | <refsect1 id="errors"><title>Errors</title> | |
78 | <para> | |
79 | <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>sync</parameter> is not the name of a sync object. | |
80 | </para> | |
81 | <para> | |
82 | <constant>GL_INVALID_VALUE</constant> is generated if <parameter>flags</parameter> is not zero. | |
83 | </para> | |
84 | <para> | |
85 | <constant>GL_INVALID_VALUE</constant> is generated if <parameter>timeout</parameter> is not <constant>GL_TIMEOUT_IGNORED</constant>. | |
86 | </para> | |
87 | </refsect1> | |
88 | <refsect1 id="seealso"><title>See Also</title> | |
89 | <para> | |
90 | <citerefentry><refentrytitle>glFenceSync</refentrytitle></citerefentry>, | |
91 | <citerefentry><refentrytitle>glClientWaitSync</refentrytitle></citerefentry> | |
92 | </para> | |
93 | </refsect1> | |
94 | <refsect1 id="Copyright"><title>Copyright</title> | |
95 | <para> | |
96 | Copyright <trademark class="copyright"></trademark> 2010 Khronos Group. | |
97 | This material may be distributed subject to the terms and conditions set forth in | |
98 | the Open Publication License, v 1.0, 8 June 1999. | |
99 | <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>. | |
100 | </para> | |
101 | </refsect1> | |
102 | </refentry> |