-#define SAVEt_ITEM 0
-#define SAVEt_SV 1
-#define SAVEt_AV 2
-#define SAVEt_HV 3
-#define SAVEt_INT 4
-#define SAVEt_LONG 5
-#define SAVEt_I32 6
-#define SAVEt_IV 7
-#define SAVEt_SPTR 8
-#define SAVEt_APTR 9
-#define SAVEt_HPTR 10
-#define SAVEt_PPTR 11
-#define SAVEt_NSTAB 12
-#define SAVEt_SVREF 13
-#define SAVEt_GP 14
-#define SAVEt_FREESV 15
-#define SAVEt_FREEOP 16
-#define SAVEt_FREEPV 17
-#define SAVEt_CLEARSV 18
-#define SAVEt_DELETE 19
-#define SAVEt_DESTRUCTOR 20
-#define SAVEt_REGCONTEXT 21
-#define SAVEt_STACK_POS 22
-#define SAVEt_I16 23
-#define SAVEt_AELEM 24
-#define SAVEt_HELEM 25
-#define SAVEt_OP 26
-#define SAVEt_HINTS 27
-#define SAVEt_ALLOC 28
-#define SAVEt_GENERIC_SVREF 29
-#define SAVEt_DESTRUCTOR_X 30
-#define SAVEt_VPTR 31
-#define SAVEt_I8 32
-#define SAVEt_COMPPAD 33
-#define SAVEt_GENERIC_PVREF 34
-
-#define SSCHECK(need) if (PL_savestack_ix + need > PL_savestack_max) savestack_grow()
+/* scope.h
+ *
+ * Copyright (C) 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001,
+ * 2002, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ */
+
+#include "scope_types.h"
+
+#define SAVEf_SETMAGIC 1
+#define SAVEf_KEEPOLDELEM 2
+
+#define SAVE_TIGHT_SHIFT 6
+#define SAVE_MASK 0x3F
+
+#define save_aelem(av,idx,sptr) save_aelem_flags(av,idx,sptr,SAVEf_SETMAGIC)
+#define save_helem(hv,key,sptr) save_helem_flags(hv,key,sptr,SAVEf_SETMAGIC)
+
+#ifndef SCOPE_SAVES_SIGNAL_MASK
+#define SCOPE_SAVES_SIGNAL_MASK 0
+#endif
+
+/* the maximum number of entries that might be pushed using the SS_ADD*
+ * macros */
+#define SS_MAXPUSH 4
+
+#define SSGROW(need) if (UNLIKELY(PL_savestack_ix + (I32)(need) > PL_savestack_max)) savestack_grow_cnt(need)
+#define SSCHECK(need) SSGROW(need) /* legacy */
#define SSPUSHINT(i) (PL_savestack[PL_savestack_ix++].any_i32 = (I32)(i))
#define SSPUSHLONG(i) (PL_savestack[PL_savestack_ix++].any_long = (long)(i))
+#define SSPUSHBOOL(p) (PL_savestack[PL_savestack_ix++].any_bool = (p))
#define SSPUSHIV(i) (PL_savestack[PL_savestack_ix++].any_iv = (IV)(i))
+#define SSPUSHUV(u) (PL_savestack[PL_savestack_ix++].any_uv = (UV)(u))
#define SSPUSHPTR(p) (PL_savestack[PL_savestack_ix++].any_ptr = (void*)(p))
#define SSPUSHDPTR(p) (PL_savestack[PL_savestack_ix++].any_dptr = (p))
#define SSPUSHDXPTR(p) (PL_savestack[PL_savestack_ix++].any_dxptr = (p))
+
+/* SS_ADD*: newer, faster versions of the above. Don't mix the two sets of
+ * macros. These are fast because they save reduce accesses to the PL_
+ * vars and move the size check to the end. Doing the check last means
+ * that values in registers will have been pushed and no longer needed, so
+ * don't need saving around the call to grow. Also, tail-call elimination
+ * of the grow() can be done. These changes reduce the code of something
+ * like save_pushptrptr() to half its former size.
+ * Of course, doing the size check *after* pushing means we must always
+ * ensure there are SS_MAXPUSH free slots on the savestack. This is ensured by
+ * savestack_grow_cnt always allocating SS_MAXPUSH slots
+ * more than asked for, or that it sets PL_savestack_max to
+ *
+ * These are for internal core use only and are subject to change */
+
+#define dSS_ADD \
+ I32 ix = PL_savestack_ix; \
+ ANY *ssp = &PL_savestack[ix]
+
+#define SS_ADD_END(need) \
+ assert((need) <= SS_MAXPUSH); \
+ ix += (need); \
+ PL_savestack_ix = ix; \
+ assert(ix <= PL_savestack_max + SS_MAXPUSH); \
+ if (UNLIKELY(ix > PL_savestack_max)) savestack_grow_cnt(ix - PL_savestack_max); \
+ assert(PL_savestack_ix <= PL_savestack_max);
+
+#define SS_ADD_INT(i) ((ssp++)->any_i32 = (I32)(i))
+#define SS_ADD_LONG(i) ((ssp++)->any_long = (long)(i))
+#define SS_ADD_BOOL(p) ((ssp++)->any_bool = (p))
+#define SS_ADD_IV(i) ((ssp++)->any_iv = (IV)(i))
+#define SS_ADD_UV(u) ((ssp++)->any_uv = (UV)(u))
+#define SS_ADD_PTR(p) ((ssp++)->any_ptr = (void*)(p))
+#define SS_ADD_DPTR(p) ((ssp++)->any_dptr = (p))
+#define SS_ADD_DXPTR(p) ((ssp++)->any_dxptr = (p))
+
#define SSPOPINT (PL_savestack[--PL_savestack_ix].any_i32)
#define SSPOPLONG (PL_savestack[--PL_savestack_ix].any_long)
+#define SSPOPBOOL (PL_savestack[--PL_savestack_ix].any_bool)
#define SSPOPIV (PL_savestack[--PL_savestack_ix].any_iv)
+#define SSPOPUV (PL_savestack[--PL_savestack_ix].any_uv)
#define SSPOPPTR (PL_savestack[--PL_savestack_ix].any_ptr)
#define SSPOPDPTR (PL_savestack[--PL_savestack_ix].any_dptr)
#define SSPOPDXPTR (PL_savestack[--PL_savestack_ix].any_dxptr)
+
/*
-=for apidoc Ams||SAVETMPS
-Opening bracket for temporaries on a callback. See C<FREETMPS> and
+=for apidoc_section $callback
+
+=for apidoc Amn;||SAVETMPS
+Opening bracket for temporaries on a callback. See C<L</FREETMPS>> and
L<perlcall>.
-=for apidoc Ams||FREETMPS
-Closing bracket for temporaries on a callback. See C<SAVETMPS> and
+=for apidoc Amn;||FREETMPS
+Closing bracket for temporaries on a callback. See C<L</SAVETMPS>> and
L<perlcall>.
-=for apidoc Ams||ENTER
-Opening bracket on a callback. See C<LEAVE> and L<perlcall>.
+=for apidoc Amn;||ENTER
+Opening bracket on a callback. See C<L</LEAVE>> and L<perlcall>.
+
+=for apidoc Amn;||LEAVE
+Closing bracket on a callback. See C<L</ENTER>> and L<perlcall>.
-=for apidoc Ams||LEAVE
-Closing bracket on a callback. See C<ENTER> and L<perlcall>.
+=for apidoc Am;||ENTER_with_name|"name"
+
+Same as C<L</ENTER>>, but when debugging is enabled it also associates the
+given literal string with the new scope.
+
+=for apidoc Am;||LEAVE_with_name|"name"
+
+Same as C<L</LEAVE>>, but when debugging is enabled it first checks that the
+scope has the given name. C<name> must be a literal string.
=cut
*/
-#define SAVETMPS save_int((int*)&PL_tmps_floor), PL_tmps_floor = PL_tmps_ix
+#define SAVETMPS Perl_savetmps(aTHX)
+
#define FREETMPS if (PL_tmps_ix > PL_tmps_floor) free_tmps()
#ifdef DEBUGGING
#define ENTER \
STMT_START { \
- push_scope(); \
- DEBUG_l(WITH_THR(Perl_deb(aTHX_ "ENTER scope %ld at %s:%d\n", \
- PL_scopestack_ix, __FILE__, __LINE__))); \
+ push_scope(); \
+ DEBUG_SCOPE("ENTER") \
} STMT_END
#define LEAVE \
STMT_START { \
- DEBUG_l(WITH_THR(Perl_deb(aTHX_ "LEAVE scope %ld at %s:%d\n", \
- PL_scopestack_ix, __FILE__, __LINE__))); \
- pop_scope(); \
+ DEBUG_SCOPE("LEAVE") \
+ pop_scope(); \
+ } STMT_END
+#define ENTER_with_name(name) \
+ STMT_START { \
+ push_scope(); \
+ if (PL_scopestack_name) \
+ PL_scopestack_name[PL_scopestack_ix-1] = ASSERT_IS_LITERAL(name);\
+ DEBUG_SCOPE("ENTER \"" name "\"") \
+ } STMT_END
+#define LEAVE_with_name(name) \
+ STMT_START { \
+ DEBUG_SCOPE("LEAVE \"" name "\"") \
+ if (PL_scopestack_name) { \
+ CLANG_DIAG_IGNORE_STMT(-Wstring-compare); \
+ assert(((char*)PL_scopestack_name[PL_scopestack_ix-1] \
+ == (char*)ASSERT_IS_LITERAL(name)) \
+ || strEQ(PL_scopestack_name[PL_scopestack_ix-1], name)); \
+ CLANG_DIAG_RESTORE_STMT; \
+ } \
+ pop_scope(); \
} STMT_END
#else
#define ENTER push_scope()
#define LEAVE pop_scope()
+#define ENTER_with_name(name) ENTER
+#define LEAVE_with_name(name) LEAVE
#endif
-#define LEAVE_SCOPE(old) if (PL_savestack_ix > old) leave_scope(old)
+#define LEAVE_SCOPE(old) STMT_START { \
+ if (PL_savestack_ix > old) leave_scope(old); \
+ } STMT_END
+
+#define SAVEI8(i) save_I8((I8*)&(i))
+#define SAVEI16(i) save_I16((I16*)&(i))
+#define SAVEI32(i) save_I32((I32*)&(i))
+#define SAVEINT(i) save_int((int*)&(i))
+#define SAVEIV(i) save_iv((IV*)&(i))
+#define SAVELONG(l) save_long((long*)&(l))
+#define SAVESTRLEN(l) Perl_save_strlen(aTHX_ (STRLEN*)&(l))
+#define SAVEBOOL(b) save_bool(&(b))
+#define SAVESPTR(s) save_sptr((SV**)&(s))
+#define SAVEPPTR(s) save_pptr((char**)&(s))
+#define SAVEVPTR(s) save_vptr((void*)&(s))
+#define SAVEPADSVANDMORTALIZE(s) save_padsv_and_mortalize(s)
+#define SAVEFREESV(s) save_freesv(MUTABLE_SV(s))
+#define SAVEFREEPADNAME(s) save_pushptr((void *)(s), SAVEt_FREEPADNAME)
+#define SAVEMORTALIZESV(s) save_mortalizesv(MUTABLE_SV(s))
+#define SAVEFREEOP(o) save_freeop((OP*)(o))
+#define SAVEFREEPV(p) save_freepv((char*)(p))
+#define SAVECLEARSV(sv) save_clearsv((SV**)&(sv))
+#define SAVEGENERICSV(s) save_generic_svref((SV**)&(s))
+#define SAVEGENERICPV(s) save_generic_pvref((char**)&(s))
+#define SAVERCPV(s) save_rcpv((char**)&(s))
+#define SAVEFREERCPV(s) save_freercpv(s)
+#define SAVESHAREDPV(s) save_shared_pvref((char**)&(s))
+#define SAVESETSVFLAGS(sv,mask,val) save_set_svflags(sv,mask,val)
+#define SAVEFREECOPHH(h) save_pushptr((void *)(h), SAVEt_FREECOPHH)
-/*
- * Not using SOFT_CAST on SAVESPTR, SAVEGENERICSV and SAVEFREESV
- * because these are used for several kinds of pointer values
- */
-#define SAVEI8(i) save_I8(SOFT_CAST(I8*)&(i))
-#define SAVEI16(i) save_I16(SOFT_CAST(I16*)&(i))
-#define SAVEI32(i) save_I32(SOFT_CAST(I32*)&(i))
-#define SAVEINT(i) save_int(SOFT_CAST(int*)&(i))
-#define SAVEIV(i) save_iv(SOFT_CAST(IV*)&(i))
-#define SAVELONG(l) save_long(SOFT_CAST(long*)&(l))
-#define SAVESPTR(s) save_sptr((SV**)&(s))
-#define SAVEPPTR(s) save_pptr(SOFT_CAST(char**)&(s))
-#define SAVEVPTR(s) save_vptr((void*)&(s))
-#define SAVEFREESV(s) save_freesv((SV*)(s))
-#define SAVEFREEOP(o) save_freeop(SOFT_CAST(OP*)(o))
-#define SAVEFREEPV(p) save_freepv(SOFT_CAST(char*)(p))
-#define SAVECLEARSV(sv) save_clearsv(SOFT_CAST(SV**)&(sv))
-#define SAVEGENERICSV(s) save_generic_svref((SV**)&(s))
-#define SAVEGENERICPV(s) save_generic_pvref((char**)&(s))
#define SAVEDELETE(h,k,l) \
- save_delete(SOFT_CAST(HV*)(h), SOFT_CAST(char*)(k), (I32)(l))
+ save_delete(MUTABLE_HV(h), (char*)(k), (I32)(l))
+#define SAVEHDELETE(h,s) \
+ save_hdelete(MUTABLE_HV(h), (s))
+#define SAVEADELETE(a,k) \
+ save_adelete(MUTABLE_AV(a), (SSize_t)(k))
#define SAVEDESTRUCTOR(f,p) \
- save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), SOFT_CAST(void*)(p))
+ save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), (void*)(p))
#define SAVEDESTRUCTOR_X(f,p) \
- save_destructor_x((DESTRUCTORFUNC_t)(f), SOFT_CAST(void*)(p))
+ save_destructor_x((DESTRUCTORFUNC_t)(f), (void*)(p))
+
+#define MORTALSVFUNC_X(f,sv) \
+ mortal_svfunc_x((SVFUNC_t)(f), sv)
+
+#define MORTALDESTRUCTOR_SV(coderef,args) \
+ mortal_destructor_sv(coderef,args)
#define SAVESTACK_POS() \
- STMT_START { \
- SSCHECK(2); \
- SSPUSHINT(PL_stack_sp - PL_stack_base); \
- SSPUSHINT(SAVEt_STACK_POS); \
+ STMT_START { \
+ dSS_ADD; \
+ SS_ADD_INT(PL_stack_sp - PL_stack_base); \
+ SS_ADD_UV(SAVEt_STACK_POS); \
+ SS_ADD_END(2); \
} STMT_END
#define SAVEOP() save_op()
-#define SAVEHINTS() \
- STMT_START { \
- if (PL_hints & HINT_LOCALIZE_HH) \
- save_hints(); \
- else { \
- SSCHECK(2); \
- SSPUSHINT(PL_hints); \
- SSPUSHINT(SAVEt_HINTS); \
- } \
- } STMT_END
+#define SAVEHINTS() save_hints()
-#define SAVECOMPPAD() \
- STMT_START { \
- if (PL_comppad && PL_curpad == AvARRAY(PL_comppad)) { \
- SSCHECK(2); \
- SSPUSHPTR((SV*)PL_comppad); \
- SSPUSHINT(SAVEt_COMPPAD); \
- } \
- else { \
- SAVEVPTR(PL_curpad); \
- SAVESPTR(PL_comppad); \
- } \
+#define SAVECOMPPAD() save_pushptr(MUTABLE_SV(PL_comppad), SAVEt_COMPPAD)
+
+#define SAVESWITCHSTACK(f,t) \
+ STMT_START { \
+ save_pushptrptr(MUTABLE_SV(f), MUTABLE_SV(t), SAVEt_SAVESWITCHSTACK); \
+ SWITCHSTACK((f),(t)); \
+ PL_curstackinfo->si_stack = (t); \
} STMT_END
+/* Note these are special, we can't just use a save_pushptrptr() on them
+ * as the target might change after a fork or thread start. */
+#define SAVECOMPILEWARNINGS() save_pushptr(PL_compiling.cop_warnings, SAVEt_COMPILE_WARNINGS)
+#define SAVECURCOPWARNINGS() save_pushptr(PL_curcop->cop_warnings, SAVEt_CURCOP_WARNINGS)
+
+
+#define SAVEPARSER(p) save_pushptr((p), SAVEt_PARSER)
+
#ifdef USE_ITHREADS
-# define SAVECOPSTASH(c) SAVEPPTR(CopSTASHPV(c))
-# define SAVECOPSTASH_FREE(c) SAVEGENERICPV(CopSTASHPV(c))
-# define SAVECOPFILE(c) SAVEPPTR(CopFILE(c))
-# define SAVECOPFILE_FREE(c) SAVEGENERICPV(CopFILE(c))
+# define SAVECOPSTASH_FREE(c) SAVEIV((c)->cop_stashoff)
+# define SAVECOPFILE_x(c) SAVEPPTR((c)->cop_file)
+# define SAVECOPFILE(c) \
+ STMT_START { \
+ SAVECOPFILE_x(c); \
+ CopFILE_debug((c),"SAVECOPFILE",0); \
+ } STMT_END
+# define SAVECOPFILE_FREE_x(c) SAVERCPV((c)->cop_file)
+# define SAVECOPFILE_FREE(c) \
+ STMT_START { \
+ SAVECOPFILE_FREE_x(c); \
+ CopFILE_debug((c),"SAVECOPFILE_FREE",0); \
+ } STMT_END
#else
-# define SAVECOPSTASH(c) SAVESPTR(CopSTASH(c))
-# define SAVECOPSTASH_FREE(c) SAVECOPSTASH(c) /* XXX not refcounted */
+# /* XXX not refcounted */
+# define SAVECOPSTASH_FREE(c) SAVESPTR(CopSTASH(c))
# define SAVECOPFILE(c) SAVESPTR(CopFILEGV(c))
# define SAVECOPFILE_FREE(c) SAVEGENERICSV(CopFILEGV(c))
#endif
-#define SAVECOPLINE(c) SAVEI16(CopLINE(c))
+#define SAVECOPLINE(c) SAVEI32(CopLINE(c))
-/* SSNEW() temporarily allocates a specified number of bytes of data on the
- * savestack. It returns an integer index into the savestack, because a
- * pointer would get broken if the savestack is moved on reallocation.
- * SSNEWa() works like SSNEW(), but also aligns the data to the specified
- * number of bytes. MEM_ALIGNBYTES is perhaps the most useful. The
- * alignment will be preserved therough savestack reallocation *only* if
- * realloc returns data aligned to a size divisible by `align'!
- *
- * SSPTR() converts the index returned by SSNEW/SSNEWa() into a pointer.
+/*
+=for apidoc_section $stack
+=for apidoc Am|SSize_t|SSNEW |Size_t size
+=for apidoc_item | |SSNEWa |Size_t size|Size_t align
+=for apidoc_item | |SSNEWat|Size_t size|type|Size_t align
+=for apidoc_item | |SSNEWt |Size_t size|type
+
+These each temporarily allocate data on the savestack, returning an SSize_t
+index into the savestack, because a pointer would get broken if the savestack
+is moved on reallocation. Use L</C<SSPTR>> to convert the returned index into
+a pointer.
+
+The forms differ in that plain C<SSNEW> allocates C<size> bytes;
+C<SSNEWt> and C<SSNEWat> allocate C<size> objects, each of which is type
+C<type>;
+and <SSNEWa> and C<SSNEWat> make sure to align the new data to an C<align>
+boundary. The most useful value for the alignment is likely to be
+L</C<MEM_ALIGNBYTES>>. The alignment will be preserved through savestack
+reallocation B<only> if realloc returns data aligned to a size divisible by
+"align"!
+
+=for apidoc Am|type |SSPTR |SSize_t index|type
+=for apidoc_item|type *|SSPTRt|SSize_t index|type
+
+These convert the C<index> returned by L/<C<SSNEW>> and kin into actual pointers.
+
+The difference is that C<SSPTR> casts the result to C<type>, and C<SSPTRt>
+casts it to a pointer of that C<type>.
+
+=cut
*/
-#define SSNEW(size) save_alloc(aTHX_ (size), 0)
+#define SSNEW(size) Perl_save_alloc(aTHX_ (size), 0)
#define SSNEWt(n,t) SSNEW((n)*sizeof(t))
-#define SSNEWa(size,align) save_alloc(aTHX_ (size), \
- (align - ((int)((caddr_t)&PL_savestack[PL_savestack_ix]) % align)) % align)
+#define SSNEWa(size,align) Perl_save_alloc(aTHX_ (size), \
+ (I32)(align - ((size_t)((caddr_t)&PL_savestack[PL_savestack_ix]) % align)) % align)
#define SSNEWat(n,t,align) SSNEWa((n)*sizeof(t), align)
-#define SSPTR(off,type) ((type) ((char*)PL_savestack + off))
-#define SSPTRt(off,type) ((type*) ((char*)PL_savestack + off))
-
-/* A jmpenv packages the state required to perform a proper non-local jump.
- * Note that there is a start_env initialized when perl starts, and top_env
- * points to this initially, so top_env should always be non-null.
- *
- * Existence of a non-null top_env->je_prev implies it is valid to call
- * longjmp() at that runlevel (we make sure start_env.je_prev is always
- * null to ensure this).
- *
- * je_mustcatch, when set at any runlevel to TRUE, means eval ops must
- * establish a local jmpenv to handle exception traps. Care must be taken
- * to restore the previous value of je_mustcatch before exiting the
- * stack frame iff JMPENV_PUSH was not called in that stack frame.
- * GSAR 97-03-27
- */
-
-struct jmpenv {
- struct jmpenv * je_prev;
- Sigjmp_buf je_buf; /* only for use if !je_throw */
- int je_ret; /* last exception thrown */
- bool je_mustcatch; /* need to call longjmp()? */
-#ifdef PERL_FLEXIBLE_EXCEPTIONS
- void (*je_throw)(int v); /* last for bincompat */
- bool je_noset; /* no need for setjmp() */
-#endif
-};
+#define SSPTR(off,type) (assert(sizeof(off) >= sizeof(SSize_t)), (type) ((char*)PL_savestack + off))
+#define SSPTRt(off,type) (assert(sizeof(off) >= sizeof(SSize_t)), (type*) ((char*)PL_savestack + off))
-typedef struct jmpenv JMPENV;
+#define save_freesv(op) save_pushptr((void *)(op), SAVEt_FREESV)
+#define save_mortalizesv(op) save_pushptr((void *)(op), SAVEt_MORTALIZESV)
-#ifdef OP_IN_REGISTER
-#define OP_REG_TO_MEM PL_opsave = op
-#define OP_MEM_TO_REG op = PL_opsave
-#else
-#define OP_REG_TO_MEM NOOP
-#define OP_MEM_TO_REG NOOP
-#endif
+# define save_freeop(op) \
+STMT_START { \
+ OP * const _o = (OP *)(op); \
+ assert(!_o->op_savefree); \
+ _o->op_savefree = 1; \
+ save_pushptr((void *)(_o), SAVEt_FREEOP); \
+ } STMT_END
+#define save_freepv(pv) save_pushptr((void *)(pv), SAVEt_FREEPV)
/*
- * How to build the first jmpenv.
- *
- * top_env needs to be non-zero. It points to an area
- * in which longjmp() stuff is stored, as C callstack
- * info there at least is thread specific this has to
- * be per-thread. Otherwise a 'die' in a thread gives
- * that thread the C stack of last thread to do an eval {}!
- */
-
-#define JMPENV_BOOTSTRAP \
- STMT_START { \
- Zero(&PL_start_env, 1, JMPENV); \
- PL_start_env.je_ret = -1; \
- PL_start_env.je_mustcatch = TRUE; \
- PL_top_env = &PL_start_env; \
- } STMT_END
+=for apidoc_section $callback
+=for apidoc save_op
-#ifdef PERL_FLEXIBLE_EXCEPTIONS
+Implements C<SAVEOP>.
-/*
- * These exception-handling macros are split up to
- * ease integration with C++ exceptions.
- *
- * To use C++ try+catch to catch Perl exceptions, an extension author
- * needs to first write an extern "C" function to throw an appropriate
- * exception object; typically it will be or contain an integer,
- * because Perl's internals use integers to track exception types:
- * extern "C" { static void thrower(int i) { throw i; } }
- *
- * Then (as shown below) the author needs to use, not the simple
- * JMPENV_PUSH, but several of its constitutent macros, to arrange for
- * the Perl internals to call thrower() rather than longjmp() to
- * report exceptions:
- *
- * dJMPENV;
- * JMPENV_PUSH_INIT(thrower);
- * try {
- * ... stuff that may throw exceptions ...
- * }
- * catch (int why) { // or whatever matches thrower()
- * JMPENV_POST_CATCH;
- * EXCEPT_SET(why);
- * switch (why) {
- * ... // handle various Perl exception codes
- * }
- * }
- * JMPENV_POP; // don't forget this!
+=cut
*/
+#define save_op() save_pushptr((void *)(PL_op), SAVEt_OP)
+
/*
- * Function that catches/throws, and its callback for the
- * body of protected processing.
+ * ex: set ts=8 sts=4 sw=4 et:
*/
-typedef void *(CPERLscope(*protect_body_t)) (pTHX_ va_list);
-typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env,
- int *, protect_body_t, ...);
-
-#define dJMPENV JMPENV cur_env; \
- volatile JMPENV *pcur_env = ((cur_env.je_noset = 0),&cur_env)
-
-#define JMPENV_PUSH_INIT_ENV(ce,THROWFUNC) \
- STMT_START { \
- (ce).je_throw = (THROWFUNC); \
- (ce).je_ret = -1; \
- (ce).je_mustcatch = FALSE; \
- (ce).je_prev = PL_top_env; \
- PL_top_env = &(ce); \
- OP_REG_TO_MEM; \
- } STMT_END
-
-#define JMPENV_PUSH_INIT(THROWFUNC) JMPENV_PUSH_INIT_ENV(*(JMPENV*)pcur_env,THROWFUNC)
-
-#define JMPENV_POST_CATCH_ENV(ce) \
- STMT_START { \
- OP_MEM_TO_REG; \
- PL_top_env = &(ce); \
- } STMT_END
-
-#define JMPENV_POST_CATCH JMPENV_POST_CATCH_ENV(*(JMPENV*)pcur_env)
-
-#define JMPENV_PUSH_ENV(ce,v) \
- STMT_START { \
- if (!(ce).je_noset) { \
- DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
- ce, PL_top_env)); \
- JMPENV_PUSH_INIT_ENV(ce,NULL); \
- EXCEPT_SET_ENV(ce,PerlProc_setjmp((ce).je_buf, 1));\
- (ce).je_noset = 1; \
- } \
- else \
- EXCEPT_SET_ENV(ce,0); \
- JMPENV_POST_CATCH_ENV(ce); \
- (v) = EXCEPT_GET_ENV(ce); \
- } STMT_END
-
-#define JMPENV_PUSH(v) JMPENV_PUSH_ENV(*(JMPENV*)pcur_env,v)
-
-#define JMPENV_POP_ENV(ce) \
- STMT_START { \
- if (PL_top_env == &(ce)) \
- PL_top_env = (ce).je_prev; \
- } STMT_END
-
-#define JMPENV_POP JMPENV_POP_ENV(*(JMPENV*)pcur_env)
-
-#define JMPENV_JUMP(v) \
- STMT_START { \
- OP_REG_TO_MEM; \
- if (PL_top_env->je_prev) { \
- if (PL_top_env->je_throw) \
- PL_top_env->je_throw(v); \
- else \
- PerlProc_longjmp(PL_top_env->je_buf, (v)); \
- } \
- if ((v) == 2) \
- PerlProc_exit(STATUS_NATIVE_EXPORT); \
- PerlIO_printf(Perl_error_log, "panic: top_env\n"); \
- PerlProc_exit(1); \
- } STMT_END
-
-#define EXCEPT_GET_ENV(ce) ((ce).je_ret)
-#define EXCEPT_GET EXCEPT_GET_ENV(*(JMPENV*)pcur_env)
-#define EXCEPT_SET_ENV(ce,v) ((ce).je_ret = (v))
-#define EXCEPT_SET(v) EXCEPT_SET_ENV(*(JMPENV*)pcur_env,v)
-
-#else /* !PERL_FLEXIBLE_EXCEPTIONS */
-
-#define dJMPENV JMPENV cur_env
-
-#define JMPENV_PUSH(v) \
- STMT_START { \
- DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
- &cur_env, PL_top_env)); \
- cur_env.je_prev = PL_top_env; \
- OP_REG_TO_MEM; \
- cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, 1); \
- OP_MEM_TO_REG; \
- PL_top_env = &cur_env; \
- cur_env.je_mustcatch = FALSE; \
- (v) = cur_env.je_ret; \
- } STMT_END
-
-#define JMPENV_POP \
- STMT_START { PL_top_env = cur_env.je_prev; } STMT_END
-
-#define JMPENV_JUMP(v) \
- STMT_START { \
- OP_REG_TO_MEM; \
- if (PL_top_env->je_prev) \
- PerlProc_longjmp(PL_top_env->je_buf, (v)); \
- if ((v) == 2) \
- PerlProc_exit(STATUS_NATIVE_EXPORT); \
- PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \
- PerlProc_exit(1); \
- } STMT_END
-
-#endif /* PERL_FLEXIBLE_EXCEPTIONS */
-
-#define CATCH_GET (PL_top_env->je_mustcatch)
-#define CATCH_SET(v) (PL_top_env->je_mustcatch = (v))
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