| 1 | /* perlvars.h |
| 2 | * |
| 3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
| 4 | * by Larry Wall and others |
| 5 | * |
| 6 | * You may distribute under the terms of either the GNU General Public |
| 7 | * License or the Artistic License, as specified in the README file. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | /****************/ |
| 12 | /* Truly global */ |
| 13 | /****************/ |
| 14 | |
| 15 | /* Don't forget to re-run embed.pl to propagate changes! */ |
| 16 | |
| 17 | /* This file describes the "global" variables used by perl |
| 18 | * This used to be in perl.h directly but we want to abstract out into |
| 19 | * distinct files which are per-thread, per-interpreter or really global, |
| 20 | * and how they're initialized. |
| 21 | * |
| 22 | * The 'G' prefix is only needed for vars that need appropriate #defines |
| 23 | * generated in embed*.h. Such symbols are also used to generate |
| 24 | * the appropriate export list for win32. */ |
| 25 | |
| 26 | /* global state */ |
| 27 | PERLVAR(Gcurinterp, PerlInterpreter *) |
| 28 | /* currently running interpreter |
| 29 | * (initial parent interpreter under |
| 30 | * useithreads) */ |
| 31 | #if defined(USE_ITHREADS) |
| 32 | PERLVAR(Gthr_key, perl_key) /* key to retrieve per-thread struct */ |
| 33 | #endif |
| 34 | |
| 35 | /* constants (these are not literals to facilitate pointer comparisons) |
| 36 | * (PERLVARISC really does create variables, despite its looks) */ |
| 37 | PERLVARISC(GYes, "1") |
| 38 | PERLVARISC(GNo, "") |
| 39 | PERLVARISC(Ghexdigit, "0123456789abcdef0123456789ABCDEF") |
| 40 | PERLVARISC(Gpatleave, "\\.^$@dDwWsSbB+*?|()-nrtfeaxc0123456789[{]}") |
| 41 | |
| 42 | /* XXX does anyone even use this? */ |
| 43 | PERLVARI(Gdo_undump, bool, FALSE) /* -u or dump seen? */ |
| 44 | |
| 45 | #if defined(MYMALLOC) && defined(USE_ITHREADS) |
| 46 | PERLVAR(Gmalloc_mutex, perl_mutex) /* Mutex for malloc */ |
| 47 | #endif |
| 48 | |
| 49 | #if defined(USE_ITHREADS) |
| 50 | PERLVAR(Gop_mutex, perl_mutex) /* Mutex for op refcounting */ |
| 51 | #endif |
| 52 | |
| 53 | #ifdef USE_ITHREADS |
| 54 | PERLVAR(Gdollarzero_mutex, perl_mutex) /* Modifying $0 */ |
| 55 | #endif |
| 56 | |
| 57 | |
| 58 | /* This is constant on most architectures, a global on OS/2 */ |
| 59 | #ifdef OS2 |
| 60 | # define PERL___C |
| 61 | #else |
| 62 | # define PERL___C const |
| 63 | #endif |
| 64 | PERLVARI(Gsh_path, PERL___C char *, SH_PATH) /* full path of shell */ |
| 65 | #undef PERL___C |
| 66 | |
| 67 | #ifndef PERL_MICRO |
| 68 | /* If Perl has to ignore SIGPFE, this is its saved state. |
| 69 | * See perl.h macros PERL_FPU_INIT and PERL_FPU_{PRE,POST}_EXEC. */ |
| 70 | PERLVAR(Gsigfpe_saved, Sighandler_t) |
| 71 | #endif |
| 72 | |
| 73 | /* Restricted hashes placeholder value. |
| 74 | * The contents are never used, only the address. */ |
| 75 | PERLVAR(Gsv_placeholder, SV) |
| 76 | |
| 77 | #ifndef PERL_MICRO |
| 78 | PERLVARI(Gcsighandlerp, Sighandler_t, Perl_csighandler) /* Pointer to C-level sighandler */ |
| 79 | #endif |
| 80 | |
| 81 | #ifndef PERL_USE_SAFE_PUTENV |
| 82 | PERLVARI(Guse_safe_putenv, int, 1) |
| 83 | #endif |
| 84 | |
| 85 | #ifdef USE_PERLIO |
| 86 | PERLVARI(Gperlio_fd_refcnt, int*, 0) /* Pointer to array of fd refcounts. */ |
| 87 | PERLVARI(Gperlio_fd_refcnt_size, int, 0) /* Size of the array */ |
| 88 | PERLVARI(Gperlio_debug_fd, int, 0) /* the fd to write perlio debug into, 0 means not set yet */ |
| 89 | #endif |
| 90 | |
| 91 | #ifdef HAS_MMAP |
| 92 | PERLVARI(Gmmap_page_size, IV, 0) |
| 93 | #endif |
| 94 | |
| 95 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
| 96 | PERLVARI(Gsig_handlers_initted, int, 0) |
| 97 | #endif |
| 98 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
| 99 | PERLVARA(Gsig_ignoring, SIG_SIZE, int) /* which signals we are ignoring */ |
| 100 | #endif |
| 101 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
| 102 | PERLVARA(Gsig_defaulting, SIG_SIZE, int) |
| 103 | #endif |
| 104 | |
| 105 | #ifndef PERL_IMPLICIT_CONTEXT |
| 106 | PERLVAR(Gsig_sv, SV*) |
| 107 | #endif |
| 108 | |
| 109 | /* XXX signals are process-wide anyway, so we |
| 110 | * ignore the implications of this for threading */ |
| 111 | #ifndef HAS_SIGACTION |
| 112 | PERLVARI(Gsig_trapped, int, 0) |
| 113 | #endif |
| 114 | |
| 115 | #ifdef DEBUGGING |
| 116 | PERLVAR(Gwatch_pvx, char*) |
| 117 | #endif |
| 118 | |
| 119 | #ifdef PERL_GLOBAL_STRUCT |
| 120 | PERLVAR(Gppaddr, Perl_ppaddr_t*) /* or opcode.h */ |
| 121 | PERLVAR(Gcheck, Perl_check_t *) /* or opcode.h */ |
| 122 | PERLVARA(Gfold_locale, 256, unsigned char) /* or perl.h */ |
| 123 | #endif |
| 124 | |
| 125 | #ifdef PERL_NEED_APPCTX |
| 126 | PERLVAR(Gappctx, void*) /* the application context */ |
| 127 | #endif |
| 128 | |
| 129 | PERLVAR(Gop_sequence, HV*) /* dump.c */ |
| 130 | PERLVARI(Gop_seq, UV, 0) /* dump.c */ |
| 131 | |
| 132 | #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE) |
| 133 | PERLVAR(Gtimesbase, struct tms) |
| 134 | #endif |
| 135 | |
| 136 | /* allocate a unique index to every module that calls MY_CXT_INIT */ |
| 137 | |
| 138 | #ifdef PERL_IMPLICIT_CONTEXT |
| 139 | # ifdef USE_ITHREADS |
| 140 | PERLVAR(Gmy_ctx_mutex, perl_mutex) |
| 141 | # endif |
| 142 | PERLVARI(Gmy_cxt_index, int, 0) |
| 143 | #endif |
| 144 | |
| 145 | #if defined(USE_ITHREADS) |
| 146 | PERLVAR(Ghints_mutex, perl_mutex) /* Mutex for refcounted he refcounting */ |
| 147 | #endif |
| 148 | |
| 149 | #if defined(USE_ITHREADS) |
| 150 | PERLVAR(Gperlio_mutex, perl_mutex) /* Mutex for perlio fd refcounts */ |
| 151 | #endif |
| 152 | |
| 153 | /* this is currently set without MUTEX protection, so keep it a type which |
| 154 | * can be set atomically (ie not a bit field) */ |
| 155 | PERLVARI(Gveto_cleanup, int, FALSE) /* exit without cleanup */ |
| 156 | |
| 157 | /* dummy variables that hold pointers to both runops functions, thus forcing |
| 158 | * them *both* to get linked in (useful for Peek.xs, debugging etc) */ |
| 159 | |
| 160 | PERLVARI(Grunops_std, runops_proc_t, MEMBER_TO_FPTR(Perl_runops_standard)) |
| 161 | PERLVARI(Grunops_dbg, runops_proc_t, MEMBER_TO_FPTR(Perl_runops_debug)) |
| 162 | |
| 163 | |
| 164 | /* These are baked at compile time into any shared perl library. |
| 165 | In future 5.10.x releases this will allow us in main() to sanity test the |
| 166 | library we're linking against. */ |
| 167 | |
| 168 | PERLVARI(Grevision, U8, PERL_REVISION) |
| 169 | PERLVARI(Gversion, U8, PERL_VERSION) |
| 170 | PERLVARI(Gsubversion, U8, PERL_SUBVERSION) |
| 171 | |
| 172 | #if defined(MULTIPLICITY) |
| 173 | # define PERL_INTERPRETER_SIZE_UPTO_MEMBER(member) \ |
| 174 | STRUCT_OFFSET(struct interpreter, member) + \ |
| 175 | sizeof(((struct interpreter*)0)->member) |
| 176 | |
| 177 | /* These might be useful. */ |
| 178 | PERLVARI(Ginterpreter_size, U16, sizeof(struct interpreter)) |
| 179 | #if defined(PERL_GLOBAL_STRUCT) |
| 180 | PERLVARI(Gglobal_struct_size, U16, sizeof(struct perl_vars)) |
| 181 | #endif |
| 182 | |
| 183 | /* This will be useful for subsequent releases, because this has to be the |
| 184 | same in your libperl as in main(), else you have a mismatch and must abort. |
| 185 | */ |
| 186 | PERLVARI(Ginterpreter_size_5_10_0, U16, |
| 187 | PERL_INTERPRETER_SIZE_UPTO_MEMBER(PERL_LAST_5_10_0_INTERP_MEMBER)) |
| 188 | #endif |