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src/common/link-canary.c
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Bruce Momjian
Update copyright for 2026
01 янв 2026, 21:24
01 янв 2026, 21:24
451c439
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/*------------------------------------------------------------------------- * link-canary.c * Detect whether src/common functions came from frontend or backend. * * Copyright (c) 2018-2026, PostgreSQL Global Development Group * * IDENTIFICATION * src/common/link-canary.c * *------------------------------------------------------------------------- */ #include "c.h" #include "common/link-canary.h" /* * This function just reports whether this file was compiled for frontend * or backend environment. We need this because in some systems, mainly * ELF-based platforms, it is possible for a shlib (such as libpq) loaded * into the backend to call a backend function named XYZ in preference to * the shlib's own function XYZ. That's bad if the two functions don't * act identically. This exact situation comes up for many functions in * src/common and src/port, where the same function names exist in both * libpq and the backend but they don't act quite identically. To verify * that appropriate measures have been taken to prevent incorrect symbol * resolution, libpq should test that this function returns true. */ bool pg_link_canary_is_frontend(void) { #ifdef FRONTEND return true; #else return false; #endif }