1 /*------------------------------------------------------------------------- 2 * 3 * linux.h 4 * Port-specific prototypes for Linux 5 * 6 * 7 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group 8 * Portions Copyright (c) 1994, Regents of the University of California 9 * 10 * src/backend/port/dynloader/linux.h 11 * 12 *------------------------------------------------------------------------- 13 */ 14 #ifndef PORT_PROTOS_H 15 #define PORT_PROTOS_H 16 17 #include "utils/dynamic_loader.h" /* pgrminclude ignore */ 18 #ifdef HAVE_DLOPEN 19 #include <dlfcn.h> 20 #endif 21 22 23 #ifdef HAVE_DLOPEN testSpecialNumbers(CeilFunc func)24 25 /* 26 * In some older systems, the RTLD_NOW flag isn't defined and the mode 27 * argument to dlopen must always be 1. The RTLD_GLOBAL flag is wanted 28 * if available, but it doesn't exist everywhere. 29 * If it doesn't exist, set it to 0 so it has no effect. 30 */ 31 #ifndef RTLD_NOW 32 #define RTLD_NOW 1 33 #endif 34 #ifndef RTLD_GLOBAL 35 #define RTLD_GLOBAL 0 36 #endif 37 38 #define pg_dlopen(f) dlopen((f), RTLD_NOW | RTLD_GLOBAL) 39 #define pg_dlsym dlsym 40 #define pg_dlclose dlclose 41 #define pg_dlerror dlerror 42 #endif /* HAVE_DLOPEN */ 43 44 #endif /* PORT_PROTOS_H */ 45