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XSUB.h
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/* XSUB.h * * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, * 2003, 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. * */ #ifndef _INC_PERL_XSUB_H #define _INC_PERL_XSUB_H 1 /* first, some documentation for xsubpp-generated items */ /* =head1 Variables created by C<xsubpp> and C<xsubpp> 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>. =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 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 L<perlxs/"Using XS With C++">. =for apidoc Amn|I32|ax Variable which is setup by C<xsubpp> to indicate the stack base offset, used by the C<ST>, C<XSprePUSH> and C<XSRETURN> macros. The C<dMARK> macro must be called prior to setup the C<MARK> variable. =for apidoc Amn|I32|items Variable which is setup by C<xsubpp> to indicate the number of items on the stack. See L<perlxs/"Variable-length Parameter Lists">. =for apidoc Amn|I32|ix Variable which is setup by C<xsubpp> to indicate which of an XSUB's aliases was used to invoke it. See L<perlxs/"The ALIAS: Keyword">. =for apidoc Am|SV*|ST|int ix Used to access elements on the XSUB's stack. =for apidoc AmU||XS Macro to declare an XSUB and its C parameter list. This is handled by C<xsubpp>. It is the same as using the more explicit 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 AmU||XS_EXTERNAL Macro to declare an XSUB and its C parameter list explicitly exporting the symbols. =for apidoc Ams||dAX Sets up the C<ax> variable. This is usually handled automatically by C<xsubpp> by calling C<dXSARGS>. =for apidoc Ams||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 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. 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 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 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. =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 #endif #ifndef PERL_UNUSED_VAR # define PERL_UNUSED_VAR(x) ((void)x) #endif #define ST(off) PL_stack_base[ax + (off)] /* XSPROTO() is also used by SWIG like this: * * typedef XSPROTO(SwigPerlWrapper); * typedef SwigPerlWrapper *SwigPerlWrapperPtr; * * This code needs to be compilable under both C and C++. * * Don't forget to change the __attribute__unused__ version of XS() * below too if you change XSPROTO() here. */ /* 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) #undef XS #undef XS_EXTERNAL #undef XS_INTERNAL #if defined(__CYGWIN__) && defined(USE_DYNAMIC_LOADING) # define XS_EXTERNAL(name) __declspec(dllexport) XSPROTO(name) # define XS_INTERNAL(name) STATIC XSPROTO(name) #endif #if defined(__SYMBIAN32__) # define XS_EXTERNAL(name) EXPORT_C XSPROTO(name) # define XS_INTERNAL(name) EXPORT_C STATIC XSPROTO(name) #endif #ifndef XS_EXTERNAL # if defined(HASATTRIBUTE_UNUSED) && !defined(__cplusplus) # define XS_EXTERNAL(name) void name(pTHX_ CV* cv __attribute__unused__) # define XS_INTERNAL(name) STATIC void name(pTHX_ CV* cv __attribute__unused__) # else # ifdef __cplusplus # define XS_EXTERNAL(name) extern "C" XSPROTO(name) # define XS_INTERNAL(name) static XSPROTO(name) # else # define XS_EXTERNAL(name) XSPROTO(name) # define XS_INTERNAL(name) STATIC XSPROTO(name) # endif # endif #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++ #define dITEMS I32 items = (I32)(SP - MARK) #if defined(lint) && defined(S_SPLINT_S) /* www.splint.org */ # define dXSARGS \ NOTE(ARGUNUSED(cv)) \ dSP; dAXMARK; dITEMS #else # define dXSARGS \ dSP; dAXMARK; dITEMS #endif #define dXSTARG SV * const targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \ ? PAD_SV(PL_op->op_targ) : sv_newmortal()) /* Should be used before final PUSHi etc. if not in PPCODE section. */ #define XSprePUSH (sp = PL_stack_base + ax - 1) #define XSANY CvXSUBANY(cv) #define dXSI32 I32 ix = XSANY.any_i32 #ifdef __cplusplus # define XSINTERFACE_CVT(ret,name) ret (*name)(...) # define XSINTERFACE_CVT_ANON(ret) ret (*)(...) #else # define XSINTERFACE_CVT(ret,name) ret (*name)() # define XSINTERFACE_CVT_ANON(ret) ret (*)() #endif #define dXSFUNCTION(ret) XSINTERFACE_CVT(ret,XSFUNCTION) #define XSINTERFACE_FUNC(ret,cv,f) ((XSINTERFACE_CVT_ANON(ret))(f)) #define XSINTERFACE_FUNC_SET(cv,f) \ CvXSUBANY(cv).any_dxptr = (void (*) (pTHX_ void*))(f) #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. */ /* =head1 Stack Manipulation Macros =for apidoc Am|void|XST_mIV|int pos|IV iv Place an integer into the specified position C<pos> on the stack. The value is stored in a new mortal SV. =for apidoc Am|void|XST_mNV|int pos|NV nv Place a double into the specified position C<pos> on the stack. The value is stored in a new mortal SV. =for apidoc Am|void|XST_mPV|int pos|char* str 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_mNO|int pos Place C<&PL_sv_no> into the specified position C<pos> on the stack. =for apidoc Am|void|XST_mYES|int pos Place C<&PL_sv_yes> into the specified position C<pos> on the stack. =for apidoc Am|void|XST_mUNDEF|int pos Place C<&PL_sv_undef> into the specified position C<pos> on the stack. =for apidoc Am|void|XSRETURN|int nitems Return from XSUB, indicating number of items on the stack. This is usually handled by C<xsubpp>. =for apidoc Am|void|XSRETURN_IV|IV iv Return an integer from an XSUB immediately. Uses C<XST_mIV>. =for apidoc Am|void|XSRETURN_UV|IV uv Return an integer from an XSUB immediately. Uses C<XST_mUV>. =for apidoc Am|void|XSRETURN_NV|NV nv Return a double from an XSUB immediately. Uses C<XST_mNV>. =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 Return C<&PL_sv_no> from an XSUB immediately. Uses C<XST_mNO>. =for apidoc Ams||XSRETURN_YES Return C<&PL_sv_yes> from an XSUB immediately. Uses C<XST_mYES>. =for apidoc Ams||XSRETURN_UNDEF Return C<&PL_sv_undef> from an XSUB immediately. Uses C<XST_mUNDEF>. =for apidoc Ams||XSRETURN_EMPTY Return an empty list from an XSUB immediately. =head1 Variables created by C<xsubpp> and C<xsubpp> internal functions =for apidoc AmU||newXSproto|char* name|XSUBADDR_t f|char* filename|const char *proto Used by C<xsubpp> to hook up XSUBs as Perl subs. Adds Perl prototypes to the subs. =for apidoc AmU||XS_VERSION The version identifier for an XS module. This is usually handled automatically by C<ExtUtils::MakeMaker>. See C<XS_VERSION_BOOTCHECK>. =for apidoc Ams||XS_VERSION_BOOTCHECK Macro to verify that a PM module's $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">. =for apidoc Ams||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. =head1 Simple Exception Handling Macros =for apidoc Ams||dXCPT Set up necessary local variables for exception handling. See L<perlguts/"Exception Handling">. =for apidoc AmU||XCPT_TRY_START Starts a try block. See L<perlguts/"Exception Handling">. =for apidoc AmU||XCPT_TRY_END Ends a try block. See L<perlguts/"Exception Handling">. =for apidoc AmU||XCPT_CATCH Introduces a catch block. See L<perlguts/"Exception Handling">. =for apidoc Ams||XCPT_RETHROW Rethrows a previously caught exception. See L<perlguts/"Exception Handling">. =cut */ #define XST_mIV(i,v) (ST(i) = sv_2mortal(newSViv(v)) ) #define XST_mUV(i,v) (ST(i) = sv_2mortal(newSVuv(v)) ) #define XST_mNV(i,v) (ST(i) = sv_2mortal(newSVnv(v)) ) #define XST_mPV(i,v) (ST(i) = sv_2mortal(newSVpv(v,0))) #define XST_mPVN(i,v,n) (ST(i) = newSVpvn_flags(v,n, SVs_TEMP)) #define XST_mNO(i) (ST(i) = &PL_sv_no ) #define XST_mYES(i) (ST(i) = &PL_sv_yes ) #define XST_mUNDEF(i) (ST(i) = &PL_sv_undef) #define XSRETURN(off) \ STMT_START { \ const IV tmpXSoff = (off); \ PL_stack_sp = PL_stack_base + ax + (tmpXSoff - 1); \ return; \ } STMT_END #define XSRETURN_IV(v) STMT_START { XST_mIV(0,v); XSRETURN(1); } STMT_END #define XSRETURN_UV(v) STMT_START { XST_mUV(0,v); XSRETURN(1); } STMT_END #define XSRETURN_NV(v) STMT_START { XST_mNV(0,v); XSRETURN(1); } STMT_END #define XSRETURN_PV(v) STMT_START { XST_mPV(0,v); XSRETURN(1); } STMT_END #define XSRETURN_PVN(v,n) STMT_START { XST_mPVN(0,v,n); XSRETURN(1); } STMT_END #define XSRETURN_NO STMT_START { XST_mNO(0); XSRETURN(1); } STMT_END #define XSRETURN_YES STMT_START { XST_mYES(0); XSRETURN(1); } STMT_END #define XSRETURN_UNDEF STMT_START { XST_mUNDEF(0); XSRETURN(1); } STMT_END #define XSRETURN_EMPTY STMT_START { XSRETURN(0); } STMT_END #define newXSproto(a,b,c,d) newXS_flags(a,b,c,d,0) #ifdef XS_VERSION # define XS_VERSION_BOOTCHECK \ Perl_xs_version_bootcheck(aTHX_ items, ax, STR_WITH_LEN(XS_VERSION)) #else # define XS_VERSION_BOOTCHECK #endif #define XS_APIVERSION_BOOTCHECK \ Perl_xs_apiversion_bootcheck(aTHX_ ST(0), STR_WITH_LEN("v" PERL_API_VERSION_STRING)) #ifdef NO_XSLOCKS # define dXCPT dJMPENV; int rEtV = 0 # define XCPT_TRY_START JMPENV_PUSH(rEtV); if (rEtV == 0) # define XCPT_TRY_END JMPENV_POP; # define XCPT_CATCH if (rEtV != 0) # define XCPT_RETHROW JMPENV_JUMP(rEtV) #endif /* The DBM_setFilter & DBM_ckFilter macros are only used by the *DB*_File modules */ #define DBM_setFilter(db_type,code) \ STMT_START { \ if (db_type) \ RETVAL = sv_mortalcopy(db_type) ; \ ST(0) = RETVAL ; \ if (db_type && (code == &PL_sv_undef)) { \ SvREFCNT_dec(db_type) ; \ db_type = NULL ; \ } \ else if (code) { \ if (db_type) \ sv_setsv(db_type, code) ; \ else \ db_type = newSVsv(code) ; \ } \ } STMT_END #define DBM_ckFilter(arg,type,name) \ STMT_START { \ if (db->type) { \ if (db->filtering) { \ croak("recursion detected in %s", name) ; \ } \ ENTER ; \ SAVETMPS ; \ SAVEINT(db->filtering) ; \ db->filtering = TRUE ; \ SAVE_DEFSV ; \ if (name[7] == 's') \ arg = newSVsv(arg); \ DEFSV_set(arg) ; \ SvTEMP_off(arg) ; \ PUSHMARK(SP) ; \ PUTBACK ; \ (void) perl_call_sv(db->type, G_DISCARD); \ SPAGAIN ; \ PUTBACK ; \ FREETMPS ; \ LEAVE ; \ if (name[7] == 's'){ \ arg = sv_2mortal(arg); \ } \ } } STMT_END #if 1 /* for compatibility */ # define VTBL_sv &PL_vtbl_sv # define VTBL_env &PL_vtbl_env # define VTBL_envelem &PL_vtbl_envelem # define VTBL_sigelem &PL_vtbl_sigelem # define VTBL_pack &PL_vtbl_pack # define VTBL_packelem &PL_vtbl_packelem # define VTBL_dbline &PL_vtbl_dbline # define VTBL_isa &PL_vtbl_isa # define VTBL_isaelem &PL_vtbl_isaelem # define VTBL_arylen &PL_vtbl_arylen # define VTBL_glob &PL_vtbl_glob # define VTBL_mglob &PL_vtbl_mglob # define VTBL_nkeys &PL_vtbl_nkeys # define VTBL_taint &PL_vtbl_taint # define VTBL_substr &PL_vtbl_substr # define VTBL_vec &PL_vtbl_vec # define VTBL_pos &PL_vtbl_pos # define VTBL_bm &PL_vtbl_bm # define VTBL_fm &PL_vtbl_fm # define VTBL_uvar &PL_vtbl_uvar # define VTBL_defelem &PL_vtbl_defelem # define VTBL_regexp &PL_vtbl_regexp # define VTBL_regdata &PL_vtbl_regdata # define VTBL_regdatum &PL_vtbl_regdatum # ifdef USE_LOCALE_COLLATE # define VTBL_collxfrm &PL_vtbl_collxfrm # endif # define VTBL_amagic &PL_vtbl_amagic # define VTBL_amagicelem &PL_vtbl_amagicelem #endif #include "perlapi.h" #if defined(PERL_IMPLICIT_CONTEXT) && !defined(PERL_NO_GET_CONTEXT) && !defined(PERL_CORE) # undef aTHX # undef aTHX_ # define aTHX PERL_GET_THX # define aTHX_ aTHX, #endif #if defined(PERL_IMPLICIT_SYS) && !defined(PERL_CORE) # ifndef NO_XSLOCKS # if defined (NETWARE) && defined (USE_STDIO) # define times PerlProc_times # define setuid PerlProc_setuid # define setgid PerlProc_setgid # define getpid PerlProc_getpid # define pause PerlProc_pause # define exit PerlProc_exit # define _exit PerlProc__exit # else # undef closedir # undef opendir # undef stdin # undef stdout # undef stderr # undef feof # undef ferror # undef fgetpos # undef ioctl # undef getlogin # undef setjmp # undef getc # undef ungetc # undef fileno /* Following symbols were giving redefinition errors while building extensions - sgp 17th Oct 2000 */ #ifdef NETWARE # undef readdir # undef fstat # undef stat # undef longjmp # undef endhostent # undef endnetent # undef endprotoent # undef endservent # undef gethostbyaddr # undef gethostbyname # undef gethostent # undef getnetbyaddr # undef getnetbyname # undef getnetent # undef getprotobyname # undef getprotobynumber # undef getprotoent # undef getservbyname # undef getservbyport # undef getservent # undef inet_ntoa # undef sethostent # undef setnetent # undef setprotoent # undef setservent #endif /* NETWARE */ /* to avoid warnings: "xyz" redefined */ #ifdef WIN32 # undef popen # undef pclose #endif /* WIN32 */ # undef socketpair # define mkdir PerlDir_mkdir # define chdir PerlDir_chdir # define rmdir PerlDir_rmdir # define closedir PerlDir_close # define opendir PerlDir_open # define readdir PerlDir_read # define rewinddir PerlDir_rewind # define seekdir PerlDir_seek # define telldir PerlDir_tell # define putenv PerlEnv_putenv # define getenv PerlEnv_getenv # define uname PerlEnv_uname # define stdin PerlSIO_stdin # define stdout PerlSIO_stdout # define stderr PerlSIO_stderr # define fopen PerlSIO_fopen # define fclose PerlSIO_fclose # define feof PerlSIO_feof # 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 ungetc PerlSIO_ungetc # define fileno PerlSIO_fileno # define fdopen PerlSIO_fdopen # define freopen PerlSIO_freopen # define fread PerlSIO_fread # define fwrite PerlSIO_fwrite # define setbuf PerlSIO_setbuf # define setvbuf PerlSIO_setvbuf # define setlinebuf PerlSIO_setlinebuf # define stdoutf PerlSIO_stdoutf # define vfprintf PerlSIO_vprintf # define ftell PerlSIO_ftell # define fseek PerlSIO_fseek # define fgetpos PerlSIO_fgetpos # define fsetpos PerlSIO_fsetpos # define frewind PerlSIO_rewind # define tmpfile PerlSIO_tmpfile # define access PerlLIO_access # define chmod PerlLIO_chmod # define chsize PerlLIO_chsize # define close PerlLIO_close # define dup PerlLIO_dup # define dup2 PerlLIO_dup2 # define flock PerlLIO_flock # define fstat PerlLIO_fstat # define ioctl PerlLIO_ioctl # define isatty PerlLIO_isatty # define link PerlLIO_link # define lseek PerlLIO_lseek # define lstat PerlLIO_lstat # define mktemp PerlLIO_mktemp # define open PerlLIO_open # define read PerlLIO_read # define rename PerlLIO_rename # define setmode PerlLIO_setmode # define stat(buf,sb) PerlLIO_stat(buf,sb) # define tmpnam PerlLIO_tmpnam # define umask PerlLIO_umask # define unlink PerlLIO_unlink # define utime PerlLIO_utime # define write PerlLIO_write # define malloc PerlMem_malloc # define realloc PerlMem_realloc # define free PerlMem_free # define abort PerlProc_abort # define exit PerlProc_exit # define _exit PerlProc__exit # define execl PerlProc_execl # define execv PerlProc_execv # define execvp PerlProc_execvp # define getuid PerlProc_getuid # define geteuid PerlProc_geteuid # define getgid PerlProc_getgid # define getegid PerlProc_getegid # define getlogin PerlProc_getlogin # define kill PerlProc_kill # define killpg PerlProc_killpg # define pause PerlProc_pause # define popen PerlProc_popen # define pclose PerlProc_pclose # define pipe PerlProc_pipe # define setuid PerlProc_setuid # define setgid PerlProc_setgid # define sleep PerlProc_sleep # define times PerlProc_times # define wait PerlProc_wait # define setjmp PerlProc_setjmp # define longjmp PerlProc_longjmp # define signal PerlProc_signal # define getpid PerlProc_getpid # define gettimeofday PerlProc_gettimeofday # define htonl PerlSock_htonl # define htons PerlSock_htons # define ntohl PerlSock_ntohl # define ntohs PerlSock_ntohs # define accept PerlSock_accept # define bind PerlSock_bind # define connect PerlSock_connect # define endhostent PerlSock_endhostent # define endnetent PerlSock_endnetent # define endprotoent PerlSock_endprotoent # define endservent PerlSock_endservent # define gethostbyaddr PerlSock_gethostbyaddr # define gethostbyname PerlSock_gethostbyname # define gethostent PerlSock_gethostent # define gethostname PerlSock_gethostname # define getnetbyaddr PerlSock_getnetbyaddr # define getnetbyname PerlSock_getnetbyname # define getnetent PerlSock_getnetent # define getpeername PerlSock_getpeername # define getprotobyname PerlSock_getprotobyname # define getprotobynumber PerlSock_getprotobynumber # define getprotoent PerlSock_getprotoent # define getservbyname PerlSock_getservbyname # define getservbyport PerlSock_getservbyport # define getservent PerlSock_getservent # define getsockname PerlSock_getsockname # define getsockopt PerlSock_getsockopt # define inet_addr PerlSock_inet_addr # define inet_ntoa PerlSock_inet_ntoa # define listen PerlSock_listen # define recv PerlSock_recv # define recvfrom PerlSock_recvfrom # define select PerlSock_select # define send PerlSock_send # define sendto PerlSock_sendto # define sethostent PerlSock_sethostent # define setnetent PerlSock_setnetent # define setprotoent PerlSock_setprotoent # define setservent PerlSock_setservent # define setsockopt PerlSock_setsockopt # define shutdown PerlSock_shutdown # define socket PerlSock_socket # 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 */ # endif /* NO_XSLOCKS */ #endif /* PERL_IMPLICIT_SYS && !PERL_CORE */ #endif /* _INC_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: */
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