*
*/
-#ifndef _INC_PERL_XSUB_H
-#define _INC_PERL_XSUB_H 1
+#ifndef PERL_XSUB_H_
+#define PERL_XSUB_H_ 1
/* first, some documentation for xsubpp-generated items */
/*
-=head1 Variables created by C<xsubpp> and C<xsubpp> internal functions
+=head1 C<xsubpp> variables and internal functions
=for apidoc Amn|char*|CLASS
Variable which is setup by C<xsubpp> to indicate the
-class name for a C++ XS constructor. This is always a C<char*>. See C<THIS>.
+class name for a C++ XS constructor. This is always a C<char*>. See
+C<L</THIS>>.
=for apidoc Amn|(whatever)|RETVAL
Variable which is setup by C<xsubpp> to hold the return value for an
-XSUB. This is always the proper type for the XSUB. See
+XSUB. This is always the proper type for the XSUB. See
L<perlxs/"The RETVAL Variable">.
=for apidoc Amn|(whatever)|THIS
Variable which is setup by C<xsubpp> to designate the object in a C++
-XSUB. This is always the proper type for the C++ object. See C<CLASS> and
+XSUB. This is always the proper type for the C++ object. See C<L</CLASS>> and
L<perlxs/"Using XS With C++">.
=for apidoc Amn|I32|ax
=for apidoc Am|SV*|ST|int ix
Used to access elements on the XSUB's stack.
-=for apidoc AmU||XS
+=for apidoc AmnU||XS
Macro to declare an XSUB and its C parameter list. This is handled by
-C<xsubpp>.
+C<xsubpp>. It is the same as using the more explicit C<XS_EXTERNAL> macro.
+
+=for apidoc AmU||XS_INTERNAL
+Macro to declare an XSUB and its C parameter list without exporting the symbols.
+This is handled by C<xsubpp> and generally preferable over exporting the XSUB
+symbols unnecessarily.
+
+=for apidoc AmnU||XS_EXTERNAL
+Macro to declare an XSUB and its C parameter list explicitly exporting the symbols.
-=for apidoc Ams||dAX
+=for apidoc Amns||dAX
Sets up the C<ax> variable.
This is usually handled automatically by C<xsubpp> by calling C<dXSARGS>.
-=for apidoc Ams||dAXMARK
+=for apidoc Amns||dAXMARK
Sets up the C<ax> variable and stack marker variable C<mark>.
This is usually handled automatically by C<xsubpp> by calling C<dXSARGS>.
-=for apidoc Ams||dITEMS
+=for apidoc Amns||dITEMS
Sets up the C<items> variable.
This is usually handled automatically by C<xsubpp> by calling C<dXSARGS>.
-=for apidoc Ams||dXSARGS
-Sets up stack and mark pointers for an XSUB, calling dSP and dMARK.
+=for apidoc Amns||dXSARGS
+Sets up stack and mark pointers for an XSUB, calling C<dSP> and C<dMARK>.
Sets up the C<ax> and C<items> variables by calling C<dAX> and C<dITEMS>.
This is usually handled automatically by C<xsubpp>.
-=for apidoc Ams||dXSI32
+=for apidoc Amns||dXSI32
Sets up the C<ix> variable for an XSUB which has aliases. This is usually
handled automatically by C<xsubpp>.
-=for apidoc Ams||dUNDERBAR
-Sets up the C<padoff_du> variable for an XSUB that wishes to use
-C<UNDERBAR>.
+=for apidoc Amns||dUNDERBAR
+Sets up any variable needed by the C<UNDERBAR> macro. It used to define
+C<padoff_du>, but it is currently a noop. However, it is strongly advised
+to still use it for ensuring past and future compatibility.
-=for apidoc AmU||UNDERBAR
-The SV* corresponding to the $_ variable. Works even if there
-is a lexical $_ in scope.
+=for apidoc AmnU||UNDERBAR
+The SV* corresponding to the C<$_> variable. Works even if there
+is a lexical C<$_> in scope.
=cut
*/
#ifndef PERL_UNUSED_ARG
-# if defined(lint) && defined(S_SPLINT_S) /* www.splint.org */
-# include <note.h>
-# define PERL_UNUSED_ARG(x) NOTE(ARGUNUSED(x))
-# else
-# define PERL_UNUSED_ARG(x) ((void)x)
-# endif
+# define PERL_UNUSED_ARG(x) ((void)x)
#endif
#ifndef PERL_UNUSED_VAR
# define PERL_UNUSED_VAR(x) ((void)x)
* Don't forget to change the __attribute__unused__ version of XS()
* below too if you change XSPROTO() here.
*/
-#define XSPROTO(name) void name(pTHX_ CV* cv)
+
+/* XS_INTERNAL is the explicit static-linkage variant of the default
+ * XS macro.
+ *
+ * XS_EXTERNAL is the same as XS_INTERNAL except it does not include
+ * "STATIC", ie. it exports XSUB symbols. You probably don't want that.
+ */
+
+#define XSPROTO(name) void name(pTHX_ CV* cv __attribute__unused__)
#undef XS
+#undef XS_EXTERNAL
+#undef XS_INTERNAL
#if defined(__CYGWIN__) && defined(USE_DYNAMIC_LOADING)
-# define XS(name) __declspec(dllexport) XSPROTO(name)
-#endif
-#if defined(__SYMBIAN32__)
-# define XS(name) EXPORT_C XSPROTO(name)
-#endif
-#ifndef XS
-# if defined(HASATTRIBUTE_UNUSED) && !defined(__cplusplus)
-# define XS(name) void name(pTHX_ CV* cv __attribute__unused__)
-# else
-# ifdef __cplusplus
-# define XS(name) extern "C" XSPROTO(name)
-# else
-# define XS(name) XSPROTO(name)
-# endif
-# endif
+# define XS_EXTERNAL(name) __declspec(dllexport) XSPROTO(name)
+# define XS_INTERNAL(name) STATIC XSPROTO(name)
+#elif defined(__SYMBIAN32__)
+# define XS_EXTERNAL(name) EXPORT_C XSPROTO(name)
+# define XS_INTERNAL(name) EXPORT_C STATIC XSPROTO(name)
+#elif defined(__cplusplus)
+# define XS_EXTERNAL(name) extern "C" XSPROTO(name)
+# define XS_INTERNAL(name) static XSPROTO(name)
+#elif defined(HASATTRIBUTE_UNUSED)
+# define XS_EXTERNAL(name) void name(pTHX_ CV* cv __attribute__unused__)
+# define XS_INTERNAL(name) STATIC void name(pTHX_ CV* cv __attribute__unused__)
+#else
+# define XS_EXTERNAL(name) XSPROTO(name)
+# define XS_INTERNAL(name) STATIC XSPROTO(name)
#endif
+/* We do export xsub symbols by default for the public XS macro.
+ * Try explicitly using XS_INTERNAL/XS_EXTERNAL instead, please. */
+#define XS(name) XS_EXTERNAL(name)
+
#define dAX const I32 ax = (I32)(MARK - PL_stack_base + 1)
#define dAXMARK \
I32 ax = POPMARK; \
- register SV **mark = PL_stack_base + ax++
+ SV **mark = PL_stack_base + ax++
#define dITEMS I32 items = (I32)(SP - MARK)
-#if defined(lint) && defined(S_SPLINT_S) /* www.splint.org */
-# define dXSARGS \
- NOTE(ARGUNUSED(cv)) \
+#define dXSARGS \
dSP; dAXMARK; dITEMS
-#else
-# define dXSARGS \
- dSP; dAXMARK; dITEMS
-#endif
+/* These 3 macros are replacements for dXSARGS macro only in bootstrap.
+ They factor out common code in every BOOT XSUB. Computation of vars mark
+ and items will optimize away in most BOOT functions. Var ax can never be
+ optimized away since BOOT must return &PL_sv_yes by default from xsubpp.
+ Note these macros are not drop in replacements for dXSARGS since they set
+ PL_xsubfilename. */
+#define dXSBOOTARGSXSAPIVERCHK \
+ I32 ax = XS_BOTHVERSION_SETXSUBFN_POPMARK_BOOTCHECK; \
+ SV **mark = PL_stack_base + ax; dSP; dITEMS
+#define dXSBOOTARGSAPIVERCHK \
+ I32 ax = XS_APIVERSION_SETXSUBFN_POPMARK_BOOTCHECK; \
+ SV **mark = PL_stack_base + ax; dSP; dITEMS
+/* dXSBOOTARGSNOVERCHK has no API in xsubpp to choose it so do
+#undef dXSBOOTARGSXSAPIVERCHK
+#define dXSBOOTARGSXSAPIVERCHK dXSBOOTARGSNOVERCHK */
+#define dXSBOOTARGSNOVERCHK \
+ I32 ax = XS_SETXSUBFN_POPMARK; \
+ SV **mark = PL_stack_base + ax; dSP; dITEMS
#define dXSTARG SV * const targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \
? PAD_SV(PL_op->op_targ) : sv_newmortal())
#define XSINTERFACE_FUNC_SET(cv,f) \
CvXSUBANY(cv).any_dxptr = (void (*) (pTHX_ void*))(f)
-#define dUNDERBAR PADOFFSET padoff_du = find_rundefsvoffset()
-#define UNDERBAR ((padoff_du == NOT_IN_PAD \
- || PAD_COMPNAME_FLAGS_isOUR(padoff_du)) \
- ? DEFSV : PAD_SVl(padoff_du))
+#define dUNDERBAR dNOOP
+#define UNDERBAR find_rundefsv()
/* Simple macros to put new mortal values onto the stack. */
/* Typically used to return values from XS functions. */
Place a copy of a string into the specified position C<pos> on the stack.
The value is stored in a new mortal SV.
+=for apidoc Am|void|XST_mUV|int pos|UV uv
+Place an unsigned integer into the specified position C<pos> on the stack. The
+value is stored in a new mortal SV.
+
=for apidoc Am|void|XST_mNO|int pos
Place C<&PL_sv_no> into the specified position C<pos> on the
stack.
=for apidoc Am|void|XSRETURN_PV|char* str
Return a copy of a string from an XSUB immediately. Uses C<XST_mPV>.
-=for apidoc Ams||XSRETURN_NO
+=for apidoc Amns||XSRETURN_NO
Return C<&PL_sv_no> from an XSUB immediately. Uses C<XST_mNO>.
-=for apidoc Ams||XSRETURN_YES
+=for apidoc Amns||XSRETURN_YES
Return C<&PL_sv_yes> from an XSUB immediately. Uses C<XST_mYES>.
-=for apidoc Ams||XSRETURN_UNDEF
+=for apidoc Amns||XSRETURN_UNDEF
Return C<&PL_sv_undef> from an XSUB immediately. Uses C<XST_mUNDEF>.
-=for apidoc Ams||XSRETURN_EMPTY
+=for apidoc Amns||XSRETURN_EMPTY
Return an empty list from an XSUB immediately.
=head1 Variables created by C<xsubpp> and C<xsubpp> internal functions
Used by C<xsubpp> to hook up XSUBs as Perl subs. Adds Perl prototypes to
the subs.
-=for apidoc AmU||XS_VERSION
+=for apidoc AmnU||XS_VERSION
The version identifier for an XS module. This is usually
-handled automatically by C<ExtUtils::MakeMaker>. See C<XS_VERSION_BOOTCHECK>.
+handled automatically by C<ExtUtils::MakeMaker>. See
+C<L</XS_VERSION_BOOTCHECK>>.
-=for apidoc Ams||XS_VERSION_BOOTCHECK
-Macro to verify that a PM module's $VERSION variable matches the XS
+=for apidoc Amns||XS_VERSION_BOOTCHECK
+Macro to verify that a PM module's C<$VERSION> variable matches the XS
module's C<XS_VERSION> variable. This is usually handled automatically by
C<xsubpp>. See L<perlxs/"The VERSIONCHECK: Keyword">.
-=head1 Simple Exception Handling Macros
+=for apidoc Amns||XS_APIVERSION_BOOTCHECK
+Macro to verify that the perl api version an XS module has been compiled against
+matches the api version of the perl interpreter it's being loaded into.
-=for apidoc Ams||dXCPT
+=head1 Exception Handling (simple) Macros
+
+=for apidoc Amns||dXCPT
Set up necessary local variables for exception handling.
See L<perlguts/"Exception Handling">.
-=for apidoc AmU||XCPT_TRY_START
+=for apidoc AmnU||XCPT_TRY_START
Starts a try block. See L<perlguts/"Exception Handling">.
-=for apidoc AmU||XCPT_TRY_END
+=for apidoc AmnU||XCPT_TRY_END
Ends a try block. See L<perlguts/"Exception Handling">.
-=for apidoc AmU||XCPT_CATCH
+=for apidoc AmnU||XCPT_CATCH
Introduces a catch block. See L<perlguts/"Exception Handling">.
-=for apidoc Ams||XCPT_RETHROW
+=for apidoc Amns||XCPT_RETHROW
Rethrows a previously caught exception. See L<perlguts/"Exception Handling">.
=cut
#define XSRETURN(off) \
STMT_START { \
const IV tmpXSoff = (off); \
+ assert(tmpXSoff >= 0);\
PL_stack_sp = PL_stack_base + ax + (tmpXSoff - 1); \
return; \
} STMT_END
#define newXSproto(a,b,c,d) newXS_flags(a,b,c,d,0)
#ifdef XS_VERSION
-# define XS_VERSION_BOOTCHECK \
- STMT_START { \
- SV *_sv; \
- const char *vn = NULL, *module = SvPV_nolen_const(ST(0)); \
- if (items >= 2) /* version supplied as bootstrap arg */ \
- _sv = ST(1); \
- else { \
- /* XXX GV_ADDWARN */ \
- _sv = get_sv(Perl_form(aTHX_ "%s::%s", module, \
- vn = "XS_VERSION"), FALSE); \
- if (!_sv || !SvOK(_sv)) \
- _sv = get_sv(Perl_form(aTHX_ "%s::%s", module, \
- vn = "VERSION"), FALSE); \
- } \
- if (_sv) { \
- SV *xssv = Perl_newSVpv(aTHX_ XS_VERSION, 0); \
- xssv = new_version(xssv); \
- if ( !sv_derived_from(_sv, "version") ) \
- _sv = new_version(_sv); \
- if ( vcmp(_sv,xssv) ) \
- Perl_croak(aTHX_ "%s object version %"SVf" does not match %s%s%s%s %"SVf,\
- module, SVfARG(vstringify(xssv)), \
- vn ? "$" : "", vn ? module : "", vn ? "::" : "", \
- vn ? vn : "bootstrap parameter", SVfARG(vstringify(_sv)));\
- } \
- } STMT_END
+# define XS_VERSION_BOOTCHECK \
+ Perl_xs_handshake(HS_KEY(FALSE, FALSE, "", XS_VERSION), HS_CXT, __FILE__, \
+ items, ax, XS_VERSION)
#else
# define XS_VERSION_BOOTCHECK
#endif
+#define XS_APIVERSION_BOOTCHECK \
+ Perl_xs_handshake(HS_KEY(FALSE, FALSE, "v" PERL_API_VERSION_STRING, ""), \
+ HS_CXT, __FILE__, items, ax, "v" PERL_API_VERSION_STRING)
+/* public API, this is a combination of XS_VERSION_BOOTCHECK and
+ XS_APIVERSION_BOOTCHECK in 1, and is backportable */
+#ifdef XS_VERSION
+# define XS_BOTHVERSION_BOOTCHECK \
+ Perl_xs_handshake(HS_KEY(FALSE, FALSE, "v" PERL_API_VERSION_STRING, XS_VERSION), \
+ HS_CXT, __FILE__, items, ax, "v" PERL_API_VERSION_STRING, XS_VERSION)
+#else
+/* should this be a #error? if you want both checked, you better supply XS_VERSION right? */
+# define XS_BOTHVERSION_BOOTCHECK XS_APIVERSION_BOOTCHECK
+#endif
+
+/* private API */
+#define XS_APIVERSION_POPMARK_BOOTCHECK \
+ Perl_xs_handshake(HS_KEY(FALSE, TRUE, "v" PERL_API_VERSION_STRING, ""), \
+ HS_CXT, __FILE__, "v" PERL_API_VERSION_STRING)
+#ifdef XS_VERSION
+# define XS_BOTHVERSION_POPMARK_BOOTCHECK \
+ Perl_xs_handshake(HS_KEY(FALSE, TRUE, "v" PERL_API_VERSION_STRING, XS_VERSION), \
+ HS_CXT, __FILE__, "v" PERL_API_VERSION_STRING, XS_VERSION)
+#else
+/* should this be a #error? if you want both checked, you better supply XS_VERSION right? */
+# define XS_BOTHVERSION_POPMARK_BOOTCHECK XS_APIVERSION_POPMARK_BOOTCHECK
+#endif
+
+#define XS_APIVERSION_SETXSUBFN_POPMARK_BOOTCHECK \
+ Perl_xs_handshake(HS_KEY(TRUE, TRUE, "v" PERL_API_VERSION_STRING, ""), \
+ HS_CXT, __FILE__, "v" PERL_API_VERSION_STRING)
+#ifdef XS_VERSION
+# define XS_BOTHVERSION_SETXSUBFN_POPMARK_BOOTCHECK \
+ Perl_xs_handshake(HS_KEY(TRUE, TRUE, "v" PERL_API_VERSION_STRING, XS_VERSION),\
+ HS_CXT, __FILE__, "v" PERL_API_VERSION_STRING, XS_VERSION)
+#else
+/* should this be a #error? if you want both checked, you better supply XS_VERSION right? */
+# define XS_BOTHVERSION_SETXSUBFN_POPMARK_BOOTCHECK XS_APIVERSION_SETXSUBFN_POPMARK_BOOTCHECK
+#endif
+
+/* For a normal bootstrap without API or XS version checking.
+ Useful for static XS modules or debugging/testing scenarios.
+ If this macro gets heavily used in the future, it should separated into
+ a separate function independent of Perl_xs_handshake for efficiency */
+#define XS_SETXSUBFN_POPMARK \
+ Perl_xs_handshake(HS_KEY(TRUE, TRUE, "", "") | HSf_NOCHK, HS_CXT, __FILE__)
+
#ifdef NO_XSLOCKS
# define dXCPT dJMPENV; int rEtV = 0
# define XCPT_TRY_START JMPENV_PUSH(rEtV); if (rEtV == 0)
# define XCPT_RETHROW JMPENV_JUMP(rEtV)
#endif
-/*
- The DBM_setFilter & DBM_ckFilter macros are only used by
- the *DB*_File modules
+/*
+ The DBM_setFilter & DBM_ckFilter macros are only used by
+ the *DB*_File modules
*/
#define DBM_setFilter(db_type,code) \
RETVAL = sv_mortalcopy(db_type) ; \
ST(0) = RETVAL ; \
if (db_type && (code == &PL_sv_undef)) { \
- SvREFCNT_dec(db_type) ; \
+ SvREFCNT_dec_NN(db_type) ; \
db_type = NULL ; \
} \
else if (code) { \
# define VTBL_sv &PL_vtbl_sv
# define VTBL_env &PL_vtbl_env
# define VTBL_envelem &PL_vtbl_envelem
-# define VTBL_sig &PL_vtbl_sig
# define VTBL_sigelem &PL_vtbl_sigelem
# define VTBL_pack &PL_vtbl_pack
# define VTBL_packelem &PL_vtbl_packelem
# undef setservent
#endif /* NETWARE */
+/* to avoid warnings: "xyz" redefined */
+#ifdef WIN32
+# undef popen
+# undef pclose
+#endif /* WIN32 */
+
# undef socketpair
# define mkdir PerlDir_mkdir
# define ferror PerlSIO_ferror
# define clearerr PerlSIO_clearerr
# define getc PerlSIO_getc
+# define fgets PerlSIO_fgets
# define fputc PerlSIO_fputc
# define fputs PerlSIO_fputs
# define fflush PerlSIO_fflush
# define utime PerlLIO_utime
# define write PerlLIO_write
# define malloc PerlMem_malloc
+# define calloc PerlMem_calloc
# define realloc PerlMem_realloc
# define free PerlMem_free
# define abort PerlProc_abort
# define socketpair PerlSock_socketpair
# endif /* NETWARE && USE_STDIO */
-# ifdef USE_SOCKETS_AS_HANDLES
-# undef fd_set
-# undef FD_SET
-# undef FD_CLR
-# undef FD_ISSET
-# undef FD_ZERO
-# define fd_set Perl_fd_set
-# define FD_SET(n,p) PERL_FD_SET(n,p)
-# define FD_CLR(n,p) PERL_FD_CLR(n,p)
-# define FD_ISSET(n,p) PERL_FD_ISSET(n,p)
-# define FD_ZERO(p) PERL_FD_ZERO(p)
-# endif /* USE_SOCKETS_AS_HANDLES */
+# undef fd_set
+# undef FD_SET
+# undef FD_CLR
+# undef FD_ISSET
+# undef FD_ZERO
+# define fd_set Perl_fd_set
+# define FD_SET(n,p) PERL_FD_SET(n,p)
+# define FD_CLR(n,p) PERL_FD_CLR(n,p)
+# define FD_ISSET(n,p) PERL_FD_ISSET(n,p)
+# define FD_ZERO(p) PERL_FD_ZERO(p)
# endif /* NO_XSLOCKS */
#endif /* PERL_IMPLICIT_SYS && !PERL_CORE */
-#endif /* _INC_PERL_XSUB_H */ /* include guard */
+#endif /* PERL_XSUB_H_ */ /* include guard */
/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
+ * ex: set ts=8 sts=4 sw=4 et:
*/