X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=scope.h;h=6cfe1247e01c5a2aeca6eeef730333682a0d9c1a;hb=25f64a11de689eea2260b6bdee0819ca648746ff;hp=330467f4cf71bdd7ffaee1c4590c94f31e121a05;hpb=57b2e4523f4df782c055782388ac1aacff9603ef;p=p5sagit%2Fp5-mst-13.2.git diff --git a/scope.h b/scope.h index 330467f..6cfe124 100644 --- a/scope.h +++ b/scope.h @@ -1,3 +1,12 @@ +/* scope.h + * + * Copyright (c) 1997-2002, Larry Wall + * + * 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 @@ -30,6 +39,16 @@ #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 35 +#define SAVEt_MORTALIZESV 36 +#define SAVEt_SHARED_PVREF 37 + +#ifndef SCOPE_SAVES_SIGNAL_MASK +#define SCOPE_SAVES_SIGNAL_MASK 0 +#endif #define SSCHECK(need) if (PL_savestack_ix + need > PL_savestack_max) savestack_grow() #define SSPUSHINT(i) (PL_savestack[PL_savestack_ix++].any_i32 = (I32)(i)) @@ -45,6 +64,26 @@ #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 and +L. + +=for apidoc Ams||FREETMPS +Closing bracket for temporaries on a callback. See C and +L. + +=for apidoc Ams||ENTER +Opening bracket on a callback. See C and L. + +=for apidoc Ams||LEAVE +Closing bracket on a callback. See C and L. + +=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() @@ -71,6 +110,7 @@ * 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)) @@ -79,11 +119,15 @@ #define SAVESPTR(s) save_sptr((SV**)&(s)) #define SAVEPPTR(s) save_pptr(SOFT_CAST(char**)&(s)) #define SAVEVPTR(s) save_vptr((void*)&(s)) +#define SAVEPADSV(s) save_padsv(s) #define SAVEFREESV(s) save_freesv((SV*)(s)) +#define SAVEMORTALIZESV(s) save_mortalizesv((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 SAVESHAREDPV(s) save_shared_pvref((char**)&(s)) #define SAVEDELETE(h,k,l) \ save_delete(SOFT_CAST(HV*)(h), SOFT_CAST(char*)(k), (I32)(l)) #define SAVEDESTRUCTOR(f,p) \ @@ -112,15 +156,32 @@ } \ } STMT_END +#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); \ + } \ + } STMT_END + #ifdef USE_ITHREADS -# define SAVECOPSTASH(cop) SAVEPPTR(CopSTASHPV(cop)) -# define SAVECOPFILE(cop) SAVEPPTR(CopFILE(cop)) +# 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(cop) SAVESPTR(CopSTASH(cop)) -# define SAVECOPFILE(cop) SAVESPTR(CopFILEGV(cop)) +# 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(cop) SAVEI16(CopLINE(cop)) +#define SAVECOPLINE(c) SAVEI16(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 @@ -133,11 +194,14 @@ * SSPTR() converts the index returned by SSNEW/SSNEWa() into a pointer. */ -#define SSNEW(size) save_alloc(size, 0) -#define SSNEWa(size,align) save_alloc(size, \ +#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 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 @@ -159,19 +223,21 @@ struct jmpenv { 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 }; typedef struct jmpenv JMPENV; -/* - * Function that catches/throws, and its callback for the - * body of protected processing. - */ -typedef void *(CPERLscope(*protect_body_t)) (pTHX_ va_list); -typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env, - int *, protect_body_t, ...); +#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 /* * How to build the first jmpenv. @@ -185,21 +251,13 @@ typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env, #define JMPENV_BOOTSTRAP \ STMT_START { \ - PL_start_env.je_prev = NULL; \ - PL_start_env.je_throw = NULL; \ + Zero(&PL_start_env, 1, JMPENV); \ PL_start_env.je_ret = -1; \ PL_start_env.je_mustcatch = TRUE; \ - PL_start_env.je_noset = 0; \ PL_top_env = &PL_start_env; \ } STMT_END -#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 +#ifdef PERL_FLEXIBLE_EXCEPTIONS /* * These exception-handling macros are split up to @@ -231,6 +289,14 @@ typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env, * JMPENV_POP; // don't forget this! */ +/* + * Function that catches/throws, and its callback for the + * body of protected processing. + */ +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) @@ -244,7 +310,7 @@ typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env, OP_REG_TO_MEM; \ } STMT_END -#define JMPENV_PUSH_INIT(THROWFUNC) JMPENV_PUSH_INIT_ENV(*(JMPENV*)pcur_env,THROWFUNC) +#define JMPENV_PUSH_INIT(THROWFUNC) JMPENV_PUSH_INIT_ENV(*(JMPENV*)pcur_env,THROWFUNC) #define JMPENV_POST_CATCH_ENV(ce) \ STMT_START { \ @@ -254,12 +320,13 @@ typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env, #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));\ + EXCEPT_SET_ENV(ce,PerlProc_setjmp((ce).je_buf, SCOPE_SAVES_SIGNAL_MASK));\ (ce).je_noset = 1; \ } \ else \ @@ -268,12 +335,15 @@ typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env, (v) = EXCEPT_GET_ENV(ce); \ } STMT_END -#define JMPENV_PUSH(v) JMPENV_PUSH_ENV(*(JMPENV*)pcur_env,v) +#define JMPENV_PUSH(v) JMPENV_PUSH_ENV(*(JMPENV*)pcur_env,v) #define JMPENV_POP_ENV(ce) \ - STMT_START { PL_top_env = (ce).je_prev; } STMT_END + 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_POP JMPENV_POP_ENV(*(JMPENV*)pcur_env) #define JMPENV_JUMP(v) \ STMT_START { \ @@ -295,5 +365,38 @@ typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile 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, SCOPE_SAVES_SIGNAL_MASK); \ + 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))