1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Automatically Load Statically Linked Extensions</title>
<style type="text/css">
body {
margin: auto;
font-family: Verdana, sans-serif;
padding: 8px 1%;
}
a { color: #044a64 }
a:visited { color: #734559 }
.logo { position:absolute; margin:3px; }
.tagline {
float:right;
text-align:right;
font-style:italic;
width:300px;
margin:12px;
margin-top:58px;
}
.menubar {
clear: both;
border-radius: 8px;
background: #044a64;
padding: 0px;
margin: 0px;
cell-spacing: 0px;
}
.toolbar {
text-align: center;
line-height: 1.6em;
margin: 0;
padding: 0px 8px;
}
.toolbar a { color: white; text-decoration: none; padding: 6px 12px; }
.toolbar a:visited { color: white; }
.toolbar a:hover { color: #044a64; background: white; }
.content { margin: 5%; }
.content dt { font-weight:bold; }
.content dd { margin-bottom: 25px; margin-left:20%; }
.content ul { padding:0px; padding-left: 15px; margin:0px; }
/* Things for "fancyformat" documents start here. */
.fancy img+p {font-style:italic}
.fancy .codeblock i { color: darkblue; }
.fancy h1,.fancy h2,.fancy h3,.fancy h4 {font-weight:normal;color:#044a64}
.fancy h2 { margin-left: 10px }
.fancy h3 { margin-left: 20px }
.fancy h4 { margin-left: 30px }
.fancy th {white-space:nowrap;text-align:left;border-bottom:solid 1px #444}
.fancy th, .fancy td {padding: 0.2em 1ex; vertical-align:top}
.fancy #toc a { color: darkblue ; text-decoration: none }
.fancy .todo { color: #AA3333 ; font-style : italic }
.fancy .todo:before { content: 'TODO:' }
.fancy p.todo { border: solid #AA3333 1px; padding: 1ex }
.fancy img { display:block; }
.fancy :link:hover, .fancy :visited:hover { background: wheat }
.fancy p,.fancy ul,.fancy ol { margin: 1em 5ex }
.fancy li p { margin: 1em 0 }
/* End of "fancyformat" specific rules. */
</style>
</head>
<body>
<div><!-- container div to satisfy validator -->
<a href="../index.html">
<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite Logo"
border="0"></a>
<div><!-- IE hack to prevent disappearing logo--></div>
<div class="tagline">Small. Fast. Reliable.<br>Choose any three.</div>
<table width=100% class="menubar"><tr>
<td width=100%>
<div class="toolbar">
<a href="../about.html">About</a>
<a href="../sitemap.html">Sitemap</a>
<a href="../docs.html">Documentation</a>
<a href="../download.html">Download</a>
<a href="../copyright.html">License</a>
<a href="../news.html">News</a>
<a href="../support.html">Support</a>
</div>
<script>
gMsg = "Search SQLite Docs..."
function entersearch() {
var q = document.getElementById("q");
if( q.value == gMsg ) { q.value = "" }
q.style.color = "black"
q.style.fontStyle = "normal"
}
function leavesearch() {
var q = document.getElementById("q");
if( q.value == "" ) {
q.value = gMsg
q.style.color = "#044a64"
q.style.fontStyle = "italic"
}
}
function hideorshow(btn,obj){
var x = document.getElementById(obj);
var b = document.getElementById(btn);
if( x.style.display!='none' ){
x.style.display = 'none';
b.innerHTML='show';
}else{
x.style.display = '';
b.innerHTML='hide';
}
return false;
}
</script>
<td>
<div style="padding:0 1em 0px 0;white-space:nowrap">
<form name=f method="GET" action="http://www.sqlite.org/search">
<input id=q name=q type=text
onfocus="entersearch()" onblur="leavesearch()" style="width:24ex;padding:1px 1ex; border:solid white 1px; font-size:0.9em ; font-style:italic;color:#044a64;" value="Search SQLite Docs...">
<input type=submit value="Go" style="border:solid white 1px;background-color:#044a64;color:white;font-size:0.9em;padding:0 1ex">
</form>
</div>
</table>
<div class=startsearch></div>
<a href="intro.html"><h2>SQLite C Interface</h2></a><h2>Automatically Load Statically Linked Extensions</h2><blockquote><pre>int sqlite3_auto_extension(void (*xEntryPoint)(void));
</pre></blockquote><p>
This interface causes the xEntryPoint() function to be invoked for
each new <a href="../c3ref/sqlite3.html">database connection</a> that is created. The idea here is that
xEntryPoint() is the entry point for a statically linked <a href="../loadext.html">SQLite extension</a>
that is to be automatically loaded into all new database connections.</p>
<p>Even though the function prototype shows that xEntryPoint() takes
no arguments and returns void, SQLite invokes xEntryPoint() with three
arguments and expects and integer result as if the signature of the
entry point where as follows:</p>
<p><blockquote><pre>
int xEntryPoint(
sqlite3 *db,
const char **pzErrMsg,
const struct sqlite3_api_routines *pThunk
);
</pre></blockquote></p>
<p>If the xEntryPoint routine encounters an error, it should make *pzErrMsg
point to an appropriate error message (obtained from <a href="../c3ref/mprintf.html">sqlite3_mprintf()</a>)
and return an appropriate <a href="../rescode.html">error code</a>. SQLite ensures that *pzErrMsg
is NULL before calling the xEntryPoint(). SQLite will invoke
<a href="../c3ref/free.html">sqlite3_free()</a> on *pzErrMsg after xEntryPoint() returns. If any
xEntryPoint() returns an error, the <a href="../c3ref/open.html">sqlite3_open()</a>, <a href="../c3ref/open.html">sqlite3_open16()</a>,
or <a href="../c3ref/open.html">sqlite3_open_v2()</a> call that provoked the xEntryPoint() will fail.</p>
<p>Calling sqlite3_auto_extension(X) with an entry point X that is already
on the list of automatic extensions is a harmless no-op. No entry point
will be called more than once for each database connection that is opened.</p>
<p>See also: <a href="../c3ref/reset_auto_extension.html">sqlite3_reset_auto_extension()</a>
and <a href="../c3ref/cancel_auto_extension.html">sqlite3_cancel_auto_extension()</a>
</p><p>See also lists of
<a href="objlist.html">Objects</a>,
<a href="constlist.html">Constants</a>, and
<a href="funclist.html">Functions</a>.</p>
|
