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Introduce PG_MODULE_MAGIC_EXT macro.

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This macro allows dynamically loaded shared libraries (modules) to
provide a wired-in module name and version, and possibly other
compile-time-constant fields in future.  This information can be
retrieved with the new pg_get_loaded_modules() function.

This feature is expected to be particularly useful for modules
that do not have any exposed SQL functionality and thus are
not associated with a SQL-level extension object.  But even for
modules that do belong to extensions, being able to verify the
actual code version can be useful.

Author: Andrei Lepikhov <lepihov@gmail.com>
Reviewed-by: Yurii Rashkovskii <yrashk@omnigres.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/dd4d1b59-d0fe-49d5-b28f-1e463b68fa32@gmail.com
This commit is contained in:
Tom Lane
2025-03-26 10:59:42 -04:00
parent e92c0632c1
commit 9324c8c580
10 changed files with 248 additions and 28 deletions
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5
contrib/auto_explain/auto_explain.c
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@ -22,7 +22,10 @@
#include "executor/instrument.h"
#include "utils/guc.h"
PG_MODULE_MAGIC;
PG_MODULE_MAGIC_EXT(
.name = "auto_explain",
.version = PG_VERSION
);
/* GUC variables */
static int auto_explain_log_min_duration = -1; /* msec or -1 */