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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 17:28:19 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 17:28:19 +0000 |
| commit | 18657a960e125336f704ea058e25c27bd3900dcb (patch) | |
| tree | 17b438b680ed45a996d7b59951e6aa34023783f2 /www/c3ref/auto_extension.html | |
| parent | Initial commit. (diff) | |
| download | sqlite3-upstream.tar.xz sqlite3-upstream.zip | |
Adding upstream version 3.40.1.upstream/3.40.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'www/c3ref/auto_extension.html')
| -rw-r--r-- | www/c3ref/auto_extension.html | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/www/c3ref/auto_extension.html b/www/c3ref/auto_extension.html new file mode 100644 index 0000000..9eddf12 --- /dev/null +++ b/www/c3ref/auto_extension.html @@ -0,0 +1,163 @@ +<!DOCTYPE html> +<html><head> +<meta name="viewport" content="width=device-width, initial-scale=1.0"> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<link href="../sqlite.css" rel="stylesheet"> +<title>Automatically Load Statically Linked Extensions</title> +<!-- path=../ --> +</head> +<body> +<div class=nosearch> +<a href="../index.html"> +<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0"> +</a> +<div><!-- IE hack to prevent disappearing logo --></div> +<div class="tagline desktoponly"> +Small. Fast. Reliable.<br>Choose any three. +</div> +<div class="menu mainmenu"> +<ul> +<li><a href="../index.html">Home</a> +<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a> +<li class='wideonly'><a href='../about.html'>About</a> +<li class='desktoponly'><a href="../docs.html">Documentation</a> +<li class='desktoponly'><a href="../download.html">Download</a> +<li class='wideonly'><a href='../copyright.html'>License</a> +<li class='desktoponly'><a href="../support.html">Support</a> +<li class='desktoponly'><a href="../prosupport.html">Purchase</a> +<li class='search' id='search_menubutton'> +<a href="javascript:void(0)" onclick='toggle_search()'>Search</a> +</ul> +</div> +<div class="menu submenu" id="submenu"> +<ul> +<li><a href='../about.html'>About</a> +<li><a href='../docs.html'>Documentation</a> +<li><a href='../download.html'>Download</a> +<li><a href='../support.html'>Support</a> +<li><a href='../prosupport.html'>Purchase</a> +</ul> +</div> +<div class="searchmenu" id="searchmenu"> +<form method="GET" action="../search"> +<select name="s" id="searchtype"> +<option value="d">Search Documentation</option> +<option value="c">Search Changelog</option> +</select> +<input type="text" name="q" id="searchbox" value=""> +<input type="submit" value="Go"> +</form> +</div> +</div> +<script> +function toggle_div(nm) { +var w = document.getElementById(nm); +if( w.style.display=="block" ){ +w.style.display = "none"; +}else{ +w.style.display = "block"; +} +} +function toggle_search() { +var w = document.getElementById("searchmenu"); +if( w.style.display=="block" ){ +w.style.display = "none"; +} else { +w.style.display = "block"; +setTimeout(function(){ +document.getElementById("searchbox").focus() +}, 30); +} +} +function div_off(nm){document.getElementById(nm).style.display="none";} +window.onbeforeunload = function(e){div_off("submenu");} +/* Disable the Search feature if we are not operating from CGI, since */ +/* Search is accomplished using CGI and will not work without it. */ +if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){ +document.getElementById("search_menubutton").style.display = "none"; +} +/* Used by the Hide/Show button beside syntax diagrams, to toggle the */ +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; +} +var antiRobot = 0; +function antiRobotGo(){ +if( antiRobot!=3 ) return; +antiRobot = 7; +var j = document.getElementById("mtimelink"); +if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href"); +} +function antiRobotDefense(){ +document.body.onmousedown=function(){ +antiRobot |= 2; +antiRobotGo(); +document.body.onmousedown=null; +} +document.body.onmousemove=function(){ +antiRobot |= 2; +antiRobotGo(); +document.body.onmousemove=null; +} +setTimeout(function(){ +antiRobot |= 1; +antiRobotGo(); +}, 100) +antiRobotGo(); +} +antiRobotDefense(); +</script> +<!-- keywords: sqlite3_auto_extension --> +<div class=nosearch> +<a href="intro.html"><h2>SQLite C Interface</h2></a> +<h2>Automatically Load Statically Linked Extensions</h2> +</div> +<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 an 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> + |