pcre_callout_block  256 ext/pcre/pcrelib/pcre.h PCRE_EXP_DECL int   (*pcre_callout)(pcre_callout_block *);
pcre_callout_block  262 ext/pcre/pcrelib/pcre.h PCRE_EXP_DECL int   pcre_callout(pcre_callout_block *);
pcre_callout_block  959 ext/pcre/pcrelib/pcre_exec.c       pcre_callout_block cb;
pcre_callout_block   58 ext/pcre/pcrelib/pcre_globals.c PCRE_EXP_DATA_DEFN int   (*pcre_callout)(pcre_callout_block *) = NULL;