| 1 | /* scope.h |
| 2 | * |
| 3 | * Copyright (C) 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 | * 2002, 2004, 2005, 2006, 2007, 2008 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 | #define SAVEt_ITEM 0 |
| 12 | #define SAVEt_SV 1 |
| 13 | #define SAVEt_AV 2 |
| 14 | #define SAVEt_HV 3 |
| 15 | #define SAVEt_INT 4 |
| 16 | #define SAVEt_LONG 5 |
| 17 | #define SAVEt_I32 6 |
| 18 | #define SAVEt_IV 7 |
| 19 | #define SAVEt_SPTR 8 |
| 20 | #define SAVEt_APTR 9 |
| 21 | #define SAVEt_HPTR 10 |
| 22 | #define SAVEt_PPTR 11 |
| 23 | #define SAVEt_NSTAB 12 |
| 24 | #define SAVEt_SVREF 13 |
| 25 | #define SAVEt_GP 14 |
| 26 | #define SAVEt_FREESV 15 |
| 27 | #define SAVEt_FREEOP 16 |
| 28 | #define SAVEt_FREEPV 17 |
| 29 | #define SAVEt_CLEARSV 18 |
| 30 | #define SAVEt_DELETE 19 |
| 31 | #define SAVEt_DESTRUCTOR 20 |
| 32 | #define SAVEt_REGCONTEXT 21 |
| 33 | #define SAVEt_STACK_POS 22 |
| 34 | #define SAVEt_I16 23 |
| 35 | #define SAVEt_AELEM 24 |
| 36 | #define SAVEt_HELEM 25 |
| 37 | #define SAVEt_OP 26 |
| 38 | #define SAVEt_HINTS 27 |
| 39 | #define SAVEt_ALLOC 28 |
| 40 | #define SAVEt_GENERIC_SVREF 29 |
| 41 | #define SAVEt_DESTRUCTOR_X 30 |
| 42 | #define SAVEt_VPTR 31 |
| 43 | #define SAVEt_I8 32 |
| 44 | #define SAVEt_COMPPAD 33 |
| 45 | #define SAVEt_GENERIC_PVREF 34 |
| 46 | #define SAVEt_PADSV_AND_MORTALIZE 35 |
| 47 | #define SAVEt_MORTALIZESV 36 |
| 48 | #define SAVEt_SHARED_PVREF 37 |
| 49 | #define SAVEt_BOOL 38 |
| 50 | #define SAVEt_SET_SVFLAGS 39 |
| 51 | #define SAVEt_SAVESWITCHSTACK 40 |
| 52 | #define SAVEt_COP_ARYBASE 41 |
| 53 | #define SAVEt_RE_STATE 42 |
| 54 | #define SAVEt_COMPILE_WARNINGS 43 |
| 55 | #define SAVEt_STACK_CXPOS 44 |
| 56 | #define SAVEt_PARSER 45 |
| 57 | #define SAVEt_ADELETE 46 |
| 58 | #define SAVEt_I32_SMALL 47 |
| 59 | #define SAVEt_INT_SMALL 48 |
| 60 | #define SAVEt_GVSV 49 |
| 61 | #define SAVEt_FREECOPHH 50 |
| 62 | |
| 63 | #define SAVEf_SETMAGIC 1 |
| 64 | #define SAVEf_KEEPOLDELEM 2 |
| 65 | |
| 66 | #define SAVE_TIGHT_SHIFT 6 |
| 67 | #define SAVE_MASK 0x3F |
| 68 | |
| 69 | #define save_aelem(av,idx,sptr) save_aelem_flags(av,idx,sptr,SAVEf_SETMAGIC) |
| 70 | #define save_helem(hv,key,sptr) save_helem_flags(hv,key,sptr,SAVEf_SETMAGIC) |
| 71 | |
| 72 | #ifndef SCOPE_SAVES_SIGNAL_MASK |
| 73 | #define SCOPE_SAVES_SIGNAL_MASK 0 |
| 74 | #endif |
| 75 | |
| 76 | #define SSCHECK(need) if (PL_savestack_ix + (I32)(need) > PL_savestack_max) savestack_grow() |
| 77 | #define SSGROW(need) if (PL_savestack_ix + (I32)(need) > PL_savestack_max) savestack_grow_cnt(need) |
| 78 | #define SSPUSHINT(i) (PL_savestack[PL_savestack_ix++].any_i32 = (I32)(i)) |
| 79 | #define SSPUSHLONG(i) (PL_savestack[PL_savestack_ix++].any_long = (long)(i)) |
| 80 | #define SSPUSHBOOL(p) (PL_savestack[PL_savestack_ix++].any_bool = (p)) |
| 81 | #define SSPUSHIV(i) (PL_savestack[PL_savestack_ix++].any_iv = (IV)(i)) |
| 82 | #define SSPUSHUV(u) (PL_savestack[PL_savestack_ix++].any_uv = (UV)(u)) |
| 83 | #define SSPUSHPTR(p) (PL_savestack[PL_savestack_ix++].any_ptr = (void*)(p)) |
| 84 | #define SSPUSHDPTR(p) (PL_savestack[PL_savestack_ix++].any_dptr = (p)) |
| 85 | #define SSPUSHDXPTR(p) (PL_savestack[PL_savestack_ix++].any_dxptr = (p)) |
| 86 | #define SSPOPINT (PL_savestack[--PL_savestack_ix].any_i32) |
| 87 | #define SSPOPLONG (PL_savestack[--PL_savestack_ix].any_long) |
| 88 | #define SSPOPBOOL (PL_savestack[--PL_savestack_ix].any_bool) |
| 89 | #define SSPOPIV (PL_savestack[--PL_savestack_ix].any_iv) |
| 90 | #define SSPOPUV (PL_savestack[--PL_savestack_ix].any_uv) |
| 91 | #define SSPOPPTR (PL_savestack[--PL_savestack_ix].any_ptr) |
| 92 | #define SSPOPDPTR (PL_savestack[--PL_savestack_ix].any_dptr) |
| 93 | #define SSPOPDXPTR (PL_savestack[--PL_savestack_ix].any_dxptr) |
| 94 | |
| 95 | /* |
| 96 | =head1 Callback Functions |
| 97 | |
| 98 | =for apidoc Ams||SAVETMPS |
| 99 | Opening bracket for temporaries on a callback. See C<FREETMPS> and |
| 100 | L<perlcall>. |
| 101 | |
| 102 | =for apidoc Ams||FREETMPS |
| 103 | Closing bracket for temporaries on a callback. See C<SAVETMPS> and |
| 104 | L<perlcall>. |
| 105 | |
| 106 | =for apidoc Ams||ENTER |
| 107 | Opening bracket on a callback. See C<LEAVE> and L<perlcall>. |
| 108 | |
| 109 | =for apidoc Ams||LEAVE |
| 110 | Closing bracket on a callback. See C<ENTER> and L<perlcall>. |
| 111 | |
| 112 | =over |
| 113 | |
| 114 | =item ENTER_with_name(name) |
| 115 | |
| 116 | Same as C<ENTER>, but when debugging is enabled it also associates the |
| 117 | given literal string with the new scope. |
| 118 | |
| 119 | =item LEAVE_with_name(name) |
| 120 | |
| 121 | Same as C<LEAVE>, but when debugging is enabled it first checks that the |
| 122 | scope has the given name. Name must be a literal string. |
| 123 | |
| 124 | =back |
| 125 | |
| 126 | =cut |
| 127 | */ |
| 128 | |
| 129 | #define SAVETMPS save_int((int*)&PL_tmps_floor), PL_tmps_floor = PL_tmps_ix |
| 130 | #define FREETMPS if (PL_tmps_ix > PL_tmps_floor) free_tmps() |
| 131 | |
| 132 | #ifdef DEBUGGING |
| 133 | #define ENTER \ |
| 134 | STMT_START { \ |
| 135 | push_scope(); \ |
| 136 | DEBUG_SCOPE("ENTER") \ |
| 137 | } STMT_END |
| 138 | #define LEAVE \ |
| 139 | STMT_START { \ |
| 140 | DEBUG_SCOPE("LEAVE") \ |
| 141 | pop_scope(); \ |
| 142 | } STMT_END |
| 143 | #define ENTER_with_name(name) \ |
| 144 | STMT_START { \ |
| 145 | push_scope(); \ |
| 146 | if (PL_scopestack_name) \ |
| 147 | PL_scopestack_name[PL_scopestack_ix-1] = name; \ |
| 148 | DEBUG_SCOPE("ENTER \"" name "\"") \ |
| 149 | } STMT_END |
| 150 | #define LEAVE_with_name(name) \ |
| 151 | STMT_START { \ |
| 152 | DEBUG_SCOPE("LEAVE \"" name "\"") \ |
| 153 | if (PL_scopestack_name) { \ |
| 154 | assert(((char*)PL_scopestack_name[PL_scopestack_ix-1] \ |
| 155 | == (char*)name) \ |
| 156 | || strEQ(PL_scopestack_name[PL_scopestack_ix-1], name)); \ |
| 157 | } \ |
| 158 | pop_scope(); \ |
| 159 | } STMT_END |
| 160 | #else |
| 161 | #define ENTER push_scope() |
| 162 | #define LEAVE pop_scope() |
| 163 | #define ENTER_with_name(name) ENTER |
| 164 | #define LEAVE_with_name(name) LEAVE |
| 165 | #endif |
| 166 | #define LEAVE_SCOPE(old) if (PL_savestack_ix > old) leave_scope(old) |
| 167 | |
| 168 | #define SAVEI8(i) save_I8((I8*)&(i)) |
| 169 | #define SAVEI16(i) save_I16((I16*)&(i)) |
| 170 | #define SAVEI32(i) save_I32((I32*)&(i)) |
| 171 | #define SAVEINT(i) save_int((int*)&(i)) |
| 172 | #define SAVEIV(i) save_iv((IV*)&(i)) |
| 173 | #define SAVELONG(l) save_long((long*)&(l)) |
| 174 | #define SAVEBOOL(b) save_bool(&(b)) |
| 175 | #define SAVESPTR(s) save_sptr((SV**)&(s)) |
| 176 | #define SAVEPPTR(s) save_pptr((char**)&(s)) |
| 177 | #define SAVEVPTR(s) save_vptr((void*)&(s)) |
| 178 | #define SAVEPADSVANDMORTALIZE(s) save_padsv_and_mortalize(s) |
| 179 | #define SAVEFREESV(s) save_freesv(MUTABLE_SV(s)) |
| 180 | #define SAVEMORTALIZESV(s) save_mortalizesv(MUTABLE_SV(s)) |
| 181 | #define SAVEFREEOP(o) save_freeop((OP*)(o)) |
| 182 | #define SAVEFREEPV(p) save_freepv((char*)(p)) |
| 183 | #define SAVECLEARSV(sv) save_clearsv((SV**)&(sv)) |
| 184 | #define SAVEGENERICSV(s) save_generic_svref((SV**)&(s)) |
| 185 | #define SAVEGENERICPV(s) save_generic_pvref((char**)&(s)) |
| 186 | #define SAVESHAREDPV(s) save_shared_pvref((char**)&(s)) |
| 187 | #define SAVESETSVFLAGS(sv,mask,val) save_set_svflags(sv,mask,val) |
| 188 | #define SAVEFREECOPHH(h) save_pushptr((void *)(h), SAVEt_FREECOPHH) |
| 189 | #define SAVEDELETE(h,k,l) \ |
| 190 | save_delete(MUTABLE_HV(h), (char*)(k), (I32)(l)) |
| 191 | #define SAVEHDELETE(h,s) \ |
| 192 | save_hdelete(MUTABLE_HV(h), (s)) |
| 193 | #define SAVEADELETE(a,k) \ |
| 194 | save_adelete(MUTABLE_AV(a), (I32)(k)) |
| 195 | #define SAVEDESTRUCTOR(f,p) \ |
| 196 | save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), (void*)(p)) |
| 197 | |
| 198 | #define SAVEDESTRUCTOR_X(f,p) \ |
| 199 | save_destructor_x((DESTRUCTORFUNC_t)(f), (void*)(p)) |
| 200 | |
| 201 | #define SAVESTACK_POS() \ |
| 202 | STMT_START { \ |
| 203 | SSCHECK(2); \ |
| 204 | SSPUSHINT(PL_stack_sp - PL_stack_base); \ |
| 205 | SSPUSHUV(SAVEt_STACK_POS); \ |
| 206 | } STMT_END |
| 207 | |
| 208 | #define SAVEOP() save_op() |
| 209 | |
| 210 | #define SAVEHINTS() save_hints() |
| 211 | |
| 212 | #define SAVECOMPPAD() save_pushptr(MUTABLE_SV(PL_comppad), SAVEt_COMPPAD) |
| 213 | |
| 214 | #define SAVESWITCHSTACK(f,t) \ |
| 215 | STMT_START { \ |
| 216 | save_pushptrptr(MUTABLE_SV(f), MUTABLE_SV(t), SAVEt_SAVESWITCHSTACK); \ |
| 217 | SWITCHSTACK((f),(t)); \ |
| 218 | PL_curstackinfo->si_stack = (t); \ |
| 219 | } STMT_END |
| 220 | |
| 221 | #define SAVECOPARYBASE(c) save_pushi32ptr(CopARYBASE_get(c), c, SAVEt_COP_ARYBASE); |
| 222 | |
| 223 | /* Need to do the cop warnings like this, rather than a "SAVEFREESHAREDPV", |
| 224 | because realloc() means that the value can actually change. Possibly |
| 225 | could have done savefreesharedpvREF, but this way actually seems cleaner, |
| 226 | as it simplifies the code that does the saves, and reduces the load on the |
| 227 | save stack. */ |
| 228 | #define SAVECOMPILEWARNINGS() save_pushptr(PL_compiling.cop_warnings, SAVEt_COMPILE_WARNINGS) |
| 229 | |
| 230 | #define SAVESTACK_CXPOS() \ |
| 231 | STMT_START { \ |
| 232 | SSCHECK(3); \ |
| 233 | SSPUSHINT(cxstack[cxstack_ix].blk_oldsp); \ |
| 234 | SSPUSHINT(cxstack_ix); \ |
| 235 | SSPUSHUV(SAVEt_STACK_CXPOS); \ |
| 236 | } STMT_END |
| 237 | |
| 238 | #define SAVEPARSER(p) save_pushptr((p), SAVEt_PARSER) |
| 239 | |
| 240 | #ifdef USE_ITHREADS |
| 241 | # define SAVECOPSTASH(c) SAVEPPTR(CopSTASHPV(c)) |
| 242 | # define SAVECOPSTASH_FREE(c) SAVESHAREDPV(CopSTASHPV(c)) |
| 243 | # define SAVECOPFILE(c) SAVEPPTR(CopFILE(c)) |
| 244 | # define SAVECOPFILE_FREE(c) SAVESHAREDPV(CopFILE(c)) |
| 245 | #else |
| 246 | # define SAVECOPSTASH(c) SAVESPTR(CopSTASH(c)) |
| 247 | # define SAVECOPSTASH_FREE(c) SAVECOPSTASH(c) /* XXX not refcounted */ |
| 248 | # define SAVECOPFILE(c) SAVESPTR(CopFILEGV(c)) |
| 249 | # define SAVECOPFILE_FREE(c) SAVEGENERICSV(CopFILEGV(c)) |
| 250 | #endif |
| 251 | |
| 252 | #define SAVECOPLINE(c) SAVEI32(CopLINE(c)) |
| 253 | |
| 254 | /* SSNEW() temporarily allocates a specified number of bytes of data on the |
| 255 | * savestack. It returns an integer index into the savestack, because a |
| 256 | * pointer would get broken if the savestack is moved on reallocation. |
| 257 | * SSNEWa() works like SSNEW(), but also aligns the data to the specified |
| 258 | * number of bytes. MEM_ALIGNBYTES is perhaps the most useful. The |
| 259 | * alignment will be preserved therough savestack reallocation *only* if |
| 260 | * realloc returns data aligned to a size divisible by "align"! |
| 261 | * |
| 262 | * SSPTR() converts the index returned by SSNEW/SSNEWa() into a pointer. |
| 263 | */ |
| 264 | |
| 265 | #define SSNEW(size) Perl_save_alloc(aTHX_ (size), 0) |
| 266 | #define SSNEWt(n,t) SSNEW((n)*sizeof(t)) |
| 267 | #define SSNEWa(size,align) Perl_save_alloc(aTHX_ (size), \ |
| 268 | (I32)(align - ((size_t)((caddr_t)&PL_savestack[PL_savestack_ix]) % align)) % align) |
| 269 | #define SSNEWat(n,t,align) SSNEWa((n)*sizeof(t), align) |
| 270 | |
| 271 | #define SSPTR(off,type) ((type) ((char*)PL_savestack + off)) |
| 272 | #define SSPTRt(off,type) ((type*) ((char*)PL_savestack + off)) |
| 273 | |
| 274 | #define save_freesv(op) save_pushptr((void *)(op), SAVEt_FREESV) |
| 275 | #define save_mortalizesv(op) save_pushptr((void *)(op), SAVEt_MORTALIZESV) |
| 276 | #define save_freeop(op) save_pushptr((void *)(op), SAVEt_FREEOP) |
| 277 | #define save_freepv(pv) save_pushptr((void *)(pv), SAVEt_FREEPV) |
| 278 | #define save_op() save_pushptr((void *)(PL_op), SAVEt_OP) |
| 279 | |
| 280 | /* |
| 281 | * Local variables: |
| 282 | * c-indentation-style: bsd |
| 283 | * c-basic-offset: 4 |
| 284 | * indent-tabs-mode: t |
| 285 | * End: |
| 286 | * |
| 287 | * ex: set ts=8 sts=4 sw=4 noet: |
| 288 | */ |