[p5sagit/p5-mst-13.2.git] / scope.h

/*    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.
 *
 */

#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 SAVEt_PADSV_AND_MORTALIZE	35
#define SAVEt_MORTALIZESV	36
#define SAVEt_SHARED_PVREF	37
#define SAVEt_BOOL		38
#define SAVEt_SET_SVFLAGS	39
#define SAVEt_SAVESWITCHSTACK	40
#define SAVEt_COP_ARYBASE	41
#define SAVEt_RE_STATE		42
#define SAVEt_COMPILE_WARNINGS	43
#define SAVEt_STACK_CXPOS	44
#define SAVEt_PARSER		45
#define SAVEt_ADELETE		46

#define SAVEf_SETMAGIC		1

#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

#define SSCHECK(need) if (PL_savestack_ix + (I32)(need) > PL_savestack_max) savestack_grow()
#define SSGROW(need) if (PL_savestack_ix + (I32)(need) > PL_savestack_max) savestack_grow_cnt(need)
#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 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))
#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 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)

/*
=head1 Callback Functions

=for apidoc Ams||SAVETMPS
Opening bracket for temporaries on a callback.  See C<FREETMPS> and
L<perlcall>.

=for apidoc Ams||FREETMPS
Closing bracket for temporaries on a callback.  See C<SAVETMPS> and
L<perlcall>.

=for apidoc Ams||ENTER
Opening bracket on a callback.  See C<LEAVE> and L<perlcall>.

=for apidoc Ams||LEAVE
Closing bracket on a callback.  See C<ENTER> and L<perlcall>.

=cut
*/

#define SAVETMPS save_int((int*)&PL_tmps_floor), PL_tmps_floor = PL_tmps_ix
#define FREETMPS if (PL_tmps_ix > PL_tmps_floor) free_tmps()

#ifdef DEBUGGING
#define ENTER							\
    STMT_START {						\
	push_scope();						\
	DEBUG_SCOPE("ENTER")					\
    } STMT_END
#define LEAVE							\
    STMT_START {						\
	DEBUG_SCOPE("LEAVE")					\
	pop_scope();						\
    } STMT_END
#else
#define ENTER push_scope()
#define LEAVE pop_scope()
#endif
#define LEAVE_SCOPE(old) if (PL_savestack_ix > old) leave_scope(old)

#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 SAVEBOOL(b)	save_bool((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 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 SAVESHAREDPV(s)		save_shared_pvref((char**)&(s))
#define SAVESETSVFLAGS(sv,mask,val)	save_set_svflags(sv,mask,val)
#define SAVEDELETE(h,k,l) \
	  save_delete(MUTABLE_HV(h), (char*)(k), (I32)(l))
#define SAVEADELETE(a,k) \
	  save_adelete(MUTABLE_AV(a), (I32)(k))
#define SAVEDESTRUCTOR(f,p) \
	  save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), (void*)(p))

#define SAVEDESTRUCTOR_X(f,p) \
	  save_destructor_x((DESTRUCTORFUNC_t)(f), (void*)(p))

#define SAVESTACK_POS() \
    STMT_START {				\
	SSCHECK(2);				\
	SSPUSHINT(PL_stack_sp - PL_stack_base);	\
	SSPUSHINT(SAVEt_STACK_POS);		\
    } STMT_END

#define SAVEOP()	save_op()

#define SAVEHINTS()	save_hints()

#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

#define SAVECOPARYBASE(c) save_pushi32ptr(CopARYBASE_get(c), c, SAVEt_COP_ARYBASE);

/* Need to do the cop warnings like this, rather than a "SAVEFREESHAREDPV",
   because realloc() means that the value can actually change. Possibly
   could have done savefreesharedpvREF, but this way actually seems cleaner,
   as it simplifies the code that does the saves, and reduces the load on the
   save stack.  */
#define SAVECOMPILEWARNINGS() save_pushptr(PL_compiling.cop_warnings, SAVEt_COMPILE_WARNINGS)

#define SAVESTACK_CXPOS() \
    STMT_START {                                  \
        SSCHECK(3);                               \
        SSPUSHINT(cxstack[cxstack_ix].blk_oldsp); \
        SSPUSHINT(cxstack_ix);                    \
        SSPUSHINT(SAVEt_STACK_CXPOS);             \
    } STMT_END

#define SAVEPARSER(p) save_pushptr((p), SAVEt_PARSER)

#ifdef USE_ITHREADS
#  define SAVECOPSTASH(c)	SAVEPPTR(CopSTASHPV(c))
#  define SAVECOPSTASH_FREE(c)	SAVESHAREDPV(CopSTASHPV(c))
#  define SAVECOPFILE(c)	SAVEPPTR(CopFILE(c))
#  define SAVECOPFILE_FREE(c)	SAVESHAREDPV(CopFILE(c))
#else
#  define SAVECOPSTASH(c)	SAVESPTR(CopSTASH(c))
#  define SAVECOPSTASH_FREE(c)	SAVECOPSTASH(c)	/* XXX not refcounted */
#  define SAVECOPFILE(c)	SAVESPTR(CopFILEGV(c))
#  define SAVECOPFILE_FREE(c)	SAVEGENERICSV(CopFILEGV(c))
#endif

#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.
 */

#define SSNEW(size)             Perl_save_alloc(aTHX_ (size), 0)
#define SSNEWt(n,t)             SSNEW((n)*sizeof(t))
#define SSNEWa(size,align)	Perl_save_alloc(aTHX_ (size), \
    (align - ((int)((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))

#define save_freesv(op)		save_pushptr((void *)(op), SAVEt_FREESV)
#define save_mortalizesv(op)	save_pushptr((void *)(op), SAVEt_MORTALIZESV)
#define save_freeop(op)		save_pushptr((void *)(op), SAVEt_FREEOP)
#define save_freepv(pv)		save_pushptr((void *)(pv), SAVEt_FREEPV)
#define save_op()		save_pushptr((void *)(PL_op), SAVEt_OP)

/*
 * Local variables:
 * c-indentation-style: bsd
 * c-basic-offset: 4
 * indent-tabs-mode: t
 * End:
 *
 * ex: set ts=8 sts=4 sw=4 noet:
 */
Commit	Line	Data
d6376244	1	/* scope.h
d6376244	2	*
1129b882	3	* Copyright (C) 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001,
1129b882	4	* 2002, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
d6376244	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
b9d12d37	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
c76ac1ee	41	#define SAVEt_DESTRUCTOR_X 30
7766f137	42	#define SAVEt_VPTR 31
e8347627	43	#define SAVEt_I8 32
354992b1	44	#define SAVEt_COMPPAD 33
f4dd75d9	45	#define SAVEt_GENERIC_PVREF 34
09edbca0	46	#define SAVEt_PADSV_AND_MORTALIZE 35
26d9b02f	47	#define SAVEt_MORTALIZESV 36
05ec9bb3	48	#define SAVEt_SHARED_PVREF 37
9febdf04	49	#define SAVEt_BOOL 38
14f338dc	50	#define SAVEt_SET_SVFLAGS 39
8b7059b1	51	#define SAVEt_SAVESWITCHSTACK 40
fc15ae8f	52	#define SAVEt_COP_ARYBASE 41
1ade1aa1	53	#define SAVEt_RE_STATE 42
68da3b2f	54	#define SAVEt_COMPILE_WARNINGS 43
ea8d6ae1	55	#define SAVEt_STACK_CXPOS 44
7c197c94	56	#define SAVEt_PARSER 45
c68ec7a9	57	#define SAVEt_ADELETE 46
79072805	58
af7df257	59	#define SAVEf_SETMAGIC 1
	60
	61	#define save_helem(hv,key,sptr) save_helem_flags(hv,key,sptr,SAVEf_SETMAGIC)
	62
b03c0a3a	63	#ifndef SCOPE_SAVES_SIGNAL_MASK
1b266415	64	#define SCOPE_SAVES_SIGNAL_MASK 0
b03c0a3a	65	#endif
b03c0a3a	66
bb7a0f54	67	#define SSCHECK(need) if (PL_savestack_ix + (I32)(need) > PL_savestack_max) savestack_grow()
bb7a0f54	68	#define SSGROW(need) if (PL_savestack_ix + (I32)(need) > PL_savestack_max) savestack_grow_cnt(need)
3280af22	69	#define SSPUSHINT(i) (PL_savestack[PL_savestack_ix++].any_i32 = (I32)(i))
3280af22	70	#define SSPUSHLONG(i) (PL_savestack[PL_savestack_ix++].any_long = (long)(i))
9febdf04	71	#define SSPUSHBOOL(p) (PL_savestack[PL_savestack_ix++].any_bool = (p))
3280af22	72	#define SSPUSHIV(i) (PL_savestack[PL_savestack_ix++].any_iv = (IV)(i))
	73	#define SSPUSHPTR(p) (PL_savestack[PL_savestack_ix++].any_ptr = (void*)(p))
	74	#define SSPUSHDPTR(p) (PL_savestack[PL_savestack_ix++].any_dptr = (p))
c76ac1ee	75	#define SSPUSHDXPTR(p) (PL_savestack[PL_savestack_ix++].any_dxptr = (p))
3280af22	76	#define SSPOPINT (PL_savestack[--PL_savestack_ix].any_i32)
3280af22	77	#define SSPOPLONG (PL_savestack[--PL_savestack_ix].any_long)
9febdf04	78	#define SSPOPBOOL (PL_savestack[--PL_savestack_ix].any_bool)
3280af22	79	#define SSPOPIV (PL_savestack[--PL_savestack_ix].any_iv)
	80	#define SSPOPPTR (PL_savestack[--PL_savestack_ix].any_ptr)
	81	#define SSPOPDPTR (PL_savestack[--PL_savestack_ix].any_dptr)
c76ac1ee	82	#define SSPOPDXPTR (PL_savestack[--PL_savestack_ix].any_dxptr)
8990e307	83
954c1994	84	/*
ccfc67b7	85	=head1 Callback Functions
ccfc67b7	86
954c1994	87	=for apidoc Ams\|\|SAVETMPS
	88	Opening bracket for temporaries on a callback. See C<FREETMPS> and
	89	L<perlcall>.
	90
	91	=for apidoc Ams\|\|FREETMPS
	92	Closing bracket for temporaries on a callback. See C<SAVETMPS> and
	93	L<perlcall>.
	94
	95	=for apidoc Ams\|\|ENTER
	96	Opening bracket on a callback. See C<LEAVE> and L<perlcall>.
	97
	98	=for apidoc Ams\|\|LEAVE
	99	Closing bracket on a callback. See C<ENTER> and L<perlcall>.
	100
	101	=cut
	102	*/
	103
3280af22	104	#define SAVETMPS save_int((int*)&PL_tmps_floor), PL_tmps_floor = PL_tmps_ix
3280af22	105	#define FREETMPS if (PL_tmps_ix > PL_tmps_floor) free_tmps()
a0d0e21e	106
f46d017c	107	#ifdef DEBUGGING
	108	#define ENTER \
	109	STMT_START { \
	110	push_scope(); \
b4ab917c	111	DEBUG_SCOPE("ENTER") \
f46d017c	112	} STMT_END
	113	#define LEAVE \
	114	STMT_START { \
b4ab917c	115	DEBUG_SCOPE("LEAVE") \
f46d017c	116	pop_scope(); \
	117	} STMT_END
	118	#else
a0d0e21e	119	#define ENTER push_scope()
a0d0e21e	120	#define LEAVE pop_scope()
f46d017c	121	#endif
3280af22	122	#define LEAVE_SCOPE(old) if (PL_savestack_ix > old) leave_scope(old)
a0d0e21e	123
3f26ef39	124	#define SAVEI8(i) save_I8((I8*)&(i))
	125	#define SAVEI16(i) save_I16((I16*)&(i))
	126	#define SAVEI32(i) save_I32((I32*)&(i))
	127	#define SAVEINT(i) save_int((int*)&(i))
	128	#define SAVEIV(i) save_iv((IV*)&(i))
	129	#define SAVELONG(l) save_long((long*)&(l))
	130	#define SAVEBOOL(b) save_bool((bool*)&(b))
55497cff	131	#define SAVESPTR(s) save_sptr((SV**)&(s))
3f26ef39	132	#define SAVEPPTR(s) save_pptr((char**)&(s))
57b2e452	133	#define SAVEVPTR(s) save_vptr((void*)&(s))
09edbca0	134	#define SAVEPADSVANDMORTALIZE(s) save_padsv_and_mortalize(s)
b1bc3f34	135	#define SAVEFREESV(s) save_freesv(MUTABLE_SV(s))
b1bc3f34	136	#define SAVEMORTALIZESV(s) save_mortalizesv(MUTABLE_SV(s))
3f26ef39	137	#define SAVEFREEOP(o) save_freeop((OP*)(o))
	138	#define SAVEFREEPV(p) save_freepv((char*)(p))
	139	#define SAVECLEARSV(sv) save_clearsv((SV**)&(sv))
b9d12d37	140	#define SAVEGENERICSV(s) save_generic_svref((SV**)&(s))
f4dd75d9	141	#define SAVEGENERICPV(s) save_generic_pvref((char**)&(s))
05ec9bb3	142	#define SAVESHAREDPV(s) save_shared_pvref((char**)&(s))
14f338dc	143	#define SAVESETSVFLAGS(sv,mask,val) save_set_svflags(sv,mask,val)
55497cff	144	#define SAVEDELETE(h,k,l) \
dbebbdb4	145	save_delete(MUTABLE_HV(h), (char*)(k), (I32)(l))
c68ec7a9	146	#define SAVEADELETE(a,k) \
c68ec7a9	147	save_adelete(MUTABLE_AV(a), (I32)(k))
55497cff	148	#define SAVEDESTRUCTOR(f,p) \
3f26ef39	149	save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), (void*)(p))
c76ac1ee	150
c76ac1ee	151	#define SAVEDESTRUCTOR_X(f,p) \
3f26ef39	152	save_destructor_x((DESTRUCTORFUNC_t)(f), (void*)(p))
25eaa213	153
	154	#define SAVESTACK_POS() \
	155	STMT_START { \
	156	SSCHECK(2); \
3280af22	157	SSPUSHINT(PL_stack_sp - PL_stack_base); \
25eaa213	158	SSPUSHINT(SAVEt_STACK_POS); \
	159	} STMT_END
	160
462e5cf6	161	#define SAVEOP() save_op()
25eaa213	162
da8315f8	163	#define SAVEHINTS() save_hints()
354992b1	164
747e2fae	165	#define SAVECOMPPAD() save_pushptr(MUTABLE_SV(PL_comppad), SAVEt_COMPPAD)
a9332b4a	166
8b7059b1	167	#define SAVESWITCHSTACK(f,t) \
8b7059b1	168	STMT_START { \
dfcd3de5	169	save_pushptrptr(MUTABLE_SV(f), MUTABLE_SV(t), SAVEt_SAVESWITCHSTACK); \
8b7059b1	170	SWITCHSTACK((f),(t)); \
	171	PL_curstackinfo->si_stack = (t); \
	172	} STMT_END
	173
7623d426	174	#define SAVECOPARYBASE(c) save_pushi32ptr(CopARYBASE_get(c), c, SAVEt_COP_ARYBASE);
fc15ae8f	175
c88c823b	176	/* Need to do the cop warnings like this, rather than a "SAVEFREESHAREDPV",
72dc9ed5	177	because realloc() means that the value can actually change. Possibly
	178	could have done savefreesharedpvREF, but this way actually seems cleaner,
	179	as it simplifies the code that does the saves, and reduces the load on the
	180	save stack. */
747e2fae	181	#define SAVECOMPILEWARNINGS() save_pushptr(PL_compiling.cop_warnings, SAVEt_COMPILE_WARNINGS)
fc15ae8f	182
ea8d6ae1	183	#define SAVESTACK_CXPOS() \
	184	STMT_START { \
	185	SSCHECK(3); \
	186	SSPUSHINT(cxstack[cxstack_ix].blk_oldsp); \
	187	SSPUSHINT(cxstack_ix); \
	188	SSPUSHINT(SAVEt_STACK_CXPOS); \
	189	} STMT_END
	190
747e2fae	191	#define SAVEPARSER(p) save_pushptr((p), SAVEt_PARSER)
7c197c94	192
57843af0	193	#ifdef USE_ITHREADS
f4dd75d9	194	# define SAVECOPSTASH(c) SAVEPPTR(CopSTASHPV(c))
05ec9bb3	195	# define SAVECOPSTASH_FREE(c) SAVESHAREDPV(CopSTASHPV(c))
f4dd75d9	196	# define SAVECOPFILE(c) SAVEPPTR(CopFILE(c))
05ec9bb3	197	# define SAVECOPFILE_FREE(c) SAVESHAREDPV(CopFILE(c))
57843af0	198	#else
f4dd75d9	199	# define SAVECOPSTASH(c) SAVESPTR(CopSTASH(c))
	200	# define SAVECOPSTASH_FREE(c) SAVECOPSTASH(c) /* XXX not refcounted */
	201	# define SAVECOPFILE(c) SAVESPTR(CopFILEGV(c))
	202	# define SAVECOPFILE_FREE(c) SAVEGENERICSV(CopFILEGV(c))
57843af0	203	#endif
57843af0	204
dea28490	205	#define SAVECOPLINE(c) SAVEI32(CopLINE(c))
57843af0	206
455ece5e	207	/* SSNEW() temporarily allocates a specified number of bytes of data on the
	208	* savestack. It returns an integer index into the savestack, because a
	209	* pointer would get broken if the savestack is moved on reallocation.
	210	* SSNEWa() works like SSNEW(), but also aligns the data to the specified
	211	* number of bytes. MEM_ALIGNBYTES is perhaps the most useful. The
	212	* alignment will be preserved therough savestack reallocation only if
a0288114	213	* realloc returns data aligned to a size divisible by "align"!
455ece5e	214	*
	215	* SSPTR() converts the index returned by SSNEW/SSNEWa() into a pointer.
	216	*/
	217
f2b2c1a7	218	#define SSNEW(size) Perl_save_alloc(aTHX_ (size), 0)
02db2b7b	219	#define SSNEWt(n,t) SSNEW((n)*sizeof(t))
f2b2c1a7	220	#define SSNEWa(size,align) Perl_save_alloc(aTHX_ (size), \
455ece5e	221	(align - ((int)((caddr_t)&PL_savestack[PL_savestack_ix]) % align)) % align)
02db2b7b	222	#define SSNEWat(n,t,align) SSNEWa((n)*sizeof(t), align)
455ece5e	223
02db2b7b	224	#define SSPTR(off,type) ((type) ((char*)PL_savestack + off))
02db2b7b	225	#define SSPTRt(off,type) ((type) ((char)PL_savestack + off))
455ece5e	226
2fd8beea	227	#define save_freesv(op) save_pushptr((void *)(op), SAVEt_FREESV)
	228	#define save_mortalizesv(op) save_pushptr((void *)(op), SAVEt_MORTALIZESV)
	229	#define save_freeop(op) save_pushptr((void *)(op), SAVEt_FREEOP)
	230	#define save_freepv(pv) save_pushptr((void *)(pv), SAVEt_FREEPV)
	231	#define save_op() save_pushptr((void *)(PL_op), SAVEt_OP)
	232
e9a8c099	233	/*
	234	* Local variables:
	235	* c-indentation-style: bsd
	236	* c-basic-offset: 4
	237	* indent-tabs-mode: t
	238	* End:
	239	*
	240	* ex: set ts=8 sts=4 sw=4 noet:
	241	*/