From: Vincent Pit Date: Wed, 4 Nov 2015 13:39:44 +0000 (-0200) Subject: The Big Boilerplate Factorization X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2Fre-engine-Hooks.git;a=commitdiff_plain;h=5bf3d4775537378e1fab2796afa571d0a0cf6bfc The Big Boilerplate Factorization --- diff --git a/Hooks.xs b/Hooks.xs index 9d3c6ba..3f9ce3e 100644 --- a/Hooks.xs +++ b/Hooks.xs @@ -6,37 +6,21 @@ #include "perl.h" #include "XSUB.h" -#define __PACKAGE__ "re::engine::Hooks" -#define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1) +/* --- XS helpers ---------------------------------------------------------- */ -/* --- Compatibility wrappers ---------------------------------------------- */ - -#define REH_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S)))))) +#define XSH_PACKAGE "re::engine::Hooks" -#ifndef SvPV_const -# define SvPV_const(S, L) SvPV(S, L) -#endif +#include "xsh/caps.h" +#include "xsh/util.h" -/* ... Thread safety and multiplicity ...................................... */ +/* ... Lexical hints ....................................................... */ -#ifndef REH_MULTIPLICITY -# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT) -# define REH_MULTIPLICITY 1 -# else -# define REH_MULTIPLICITY 0 -# endif +#if !defined(cop_hints_fetch_pvn) && XSH_HAS_PERL(5, 9, 5) +# define cop_hints_fetch_pvn(COP, PKG, PKGLEN, PKGHASH, FLAGS) \ + Perl_refcounted_he_fetch(aTHX_ (COP)->cop_hints_hash, NULL, \ + (PKG), (PKGLEN), (FLAGS), (PKGHASH)) #endif -#ifdef USE_ITHREADS -# define REH_LOCK(M) MUTEX_LOCK(M) -# define REH_UNLOCK(M) MUTEX_UNLOCK(M) -#else -# define REH_LOCK(M) NOOP -# define REH_UNLOCK(M) NOOP -#endif - -/* --- Lexical hints ------------------------------------------------------- */ - STATIC U32 reh_hash = 0; STATIC SV *reh_hint(pTHX) { @@ -44,24 +28,30 @@ STATIC SV *reh_hint(pTHX) { SV *hint; #ifdef cop_hints_fetch_pvn - hint = cop_hints_fetch_pvn(PL_curcop, __PACKAGE__, __PACKAGE_LEN__, + hint = cop_hints_fetch_pvn(PL_curcop, XSH_PACKAGE, XSH_PACKAGE_LEN, reh_hash, 0); -#elif REH_HAS_PERL(5, 9, 5) - hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, - NULL, - __PACKAGE__, __PACKAGE_LEN__, - 0, - reh_hash); #else - SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0); - if (!val) - return 0; - hint = *val; + SV **val = hv_fetch(GvHV(PL_hintgv), XSH_PACKAGE, XSH_PACKAGE_LEN, 0); + hint = val ? *val : NULL; #endif return hint; } +/* ... Thread-local storage ................................................ */ + +#define XSH_THREADS_USER_CONTEXT 0 +#define XSH_THREADS_USER_LOCAL_SETUP 0 +#define XSH_THREADS_USER_LOCAL_TEARDOWN 0 + +#include "xsh/threads.h" + +/* --- Compatibility wrappers ---------------------------------------------- */ + +#ifndef SvPV_const +# define SvPV_const(S, L) SvPV(S, L) +#endif + /* --- Public API ---------------------------------------------------------- */ #include "re_engine_hooks.h" @@ -100,10 +90,10 @@ void reh_register(pTHX_ const char *key, reh_config *cfg) { a->key = key_dup; a->klen = len; - REH_LOCK(&reh_action_list_mutex); + XSH_LOCK(&reh_action_list_mutex); a->next = reh_action_list; reh_action_list = a; - REH_UNLOCK(&reh_action_list_mutex); + XSH_UNLOCK(&reh_action_list_mutex); return; } @@ -121,12 +111,12 @@ EXTERN_C REGEXP *reh_re_compile(pTHX_ const SV * const, const U32); #else EXTERN_C REGEXP *reh_re_compile(pTHX_ SV * const, U32); #endif -#if REH_HAS_PERL(5, 19, 4) +#if XSH_HAS_PERL(5, 19, 4) EXTERN_C I32 reh_regexec_flags(pTHX_ REGEXP * const, char *, char *, char *, SSize_t, SV *, void *, U32); #else EXTERN_C I32 reh_regexec_flags(pTHX_ REGEXP * const, char *, char *, char *, I32, SV *, void *, U32); #endif -#if REH_HAS_PERL(5, 19, 1) +#if XSH_HAS_PERL(5, 19, 1) EXTERN_C char * reh_re_intuit_start(pTHX_ REGEXP * const, SV *, const char * const, char *, char *, U32, re_scream_pos_data *); #else EXTERN_C char * reh_re_intuit_start(pTHX_ REGEXP * const, SV *, char *, char *, U32, re_scream_pos_data *); @@ -147,7 +137,7 @@ EXTERN_C SV * reh_reg_qr_package(pTHX_ REGEXP * const); #ifdef USE_ITHREADS EXTERN_C void * reh_re_dupe(pTHX_ REGEXP * const, CLONE_PARAMS *); #endif -#if REH_HAS_PERL(5, 17, 1) +#if XSH_HAS_PERL(5, 17, 1) EXTERN_C REGEXP *reh_re_op_compile(pTHX_ SV ** const, int, OP *, const regexp_engine*, REGEXP *VOL, bool *, U32, U32); #endif @@ -166,7 +156,7 @@ const struct regexp_engine reh_regexp_engine = { #if defined(USE_ITHREADS) , reh_re_dupe #endif -#if REH_HAS_PERL(5, 17, 1) +#if XSH_HAS_PERL(5, 17, 1) , reh_re_op_compile #endif }; @@ -179,8 +169,11 @@ typedef struct { U32 refcount; } reh_private; -STATIC void reh_private_free(pTHX_ reh_private *priv) { -#define reh_private_free(P) reh_private_free(aTHX_ (P)) +STATIC void reh_private_free(pPMS_ reh_private *priv) { +#define reh_private_free(P) reh_private_free(aPMS_ (P)) + if (!priv) + return; + if (priv->refcount <= 1) { PerlMemShared_free((void *) priv->cbs); PerlMemShared_free(priv); @@ -189,20 +182,16 @@ STATIC void reh_private_free(pTHX_ reh_private *priv) { } } -#define PTABLE_NAME ptable_private -#define PTABLE_VAL_FREE(V) reh_private_free(V) - -#define pPTBL pTHX -#define pPTBL_ pTHX_ -#define aPTBL aTHX -#define aPTBL_ aTHX_ +#define PTABLE_NAME ptable_private +#define PTABLE_VAL_FREE(V) reh_private_free(V) +#define PTABLE_VAL_NEED_CONTEXT 0 -#include "ptable.h" +#include "xsh/ptable.h" -#define ptable_private_store(T, K, V) ptable_private_store(aTHX_ (T), (K), (V)) -#define ptable_private_delete(T, K) ptable_private_delete(aTHX_ (T), (K)) -#define ptable_private_clear(T) ptable_private_clear(aTHX_ (T)) -#define ptable_private_free(T) ptable_private_free(aTHX_ (T)) +#define ptable_private_store(T, K, V) ptable_private_store(aPMS_ (T), (K), (V)) +#define ptable_private_delete(T, K) ptable_private_delete(aPMS_ (T), (K)) +#define ptable_private_clear(T) ptable_private_clear(aPMS_ (T)) +#define ptable_private_free(T) ptable_private_free(aPMS_ (T)) STATIC ptable *reh_private_map; @@ -214,7 +203,7 @@ STATIC perl_mutex reh_private_map_mutex; #define REH_PRIVATE_MAP_FOREACH(C) STMT_START { \ reh_private *priv; \ - REH_LOCK(&reh_private_map_mutex); \ + XSH_LOCK(&reh_private_map_mutex); \ priv = ptable_fetch(reh_private_map, rx->pprivate); \ if (priv) { \ const reh_config *cbs = priv->cbs; \ @@ -225,14 +214,14 @@ STATIC perl_mutex reh_private_map_mutex; } \ } \ } \ - REH_UNLOCK(&reh_private_map_mutex); \ + XSH_UNLOCK(&reh_private_map_mutex); \ } STMT_END STATIC void reh_private_map_store(pTHX_ void *ri, reh_private *priv) { #define reh_private_map_store(R, P) reh_private_map_store(aTHX_ (R), (P)) - REH_LOCK(&reh_private_map_mutex); + XSH_LOCK(&reh_private_map_mutex); ptable_private_store(reh_private_map, ri, priv); - REH_UNLOCK(&reh_private_map_mutex); + XSH_UNLOCK(&reh_private_map_mutex); return; } @@ -241,20 +230,20 @@ STATIC void reh_private_map_copy(pTHX_ void *ri_from, void *ri_to) { #define reh_private_map_copy(F, T) reh_private_map_copy(aTHX_ (F), (T)) reh_private *priv; - REH_LOCK(&reh_private_map_mutex); + XSH_LOCK(&reh_private_map_mutex); priv = ptable_fetch(reh_private_map, ri_from); if (priv) { ++priv->refcount; ptable_private_store(reh_private_map, ri_to, priv); } - REH_UNLOCK(&reh_private_map_mutex); + XSH_UNLOCK(&reh_private_map_mutex); } STATIC void reh_private_map_delete(pTHX_ void *ri) { #define reh_private_map_delete(R) reh_private_map_delete(aTHX_ (R)) - REH_LOCK(&reh_private_map_mutex); + XSH_LOCK(&reh_private_map_mutex); ptable_private_delete(reh_private_map, ri); - REH_UNLOCK(&reh_private_map_mutex); + XSH_UNLOCK(&reh_private_map_mutex); return; } @@ -273,9 +262,9 @@ void reh_call_comp_begin_hook(pTHX_ regexp *rx) { reh_config *cbs = NULL; reh_action *a, *root; - REH_LOCK(&reh_action_list_mutex); + XSH_LOCK(&reh_action_list_mutex); root = reh_action_list; - REH_UNLOCK(&reh_action_list_mutex); + XSH_UNLOCK(&reh_action_list_mutex); for (a = root; a; a = a->next) { char *p = strstr(keys, a->key); @@ -343,13 +332,30 @@ void *reh_re_dupe(pTHX_ REGEXP * const RX, CLONE_PARAMS *param) { #endif -STATIC void reh_teardown(pTHX_ void *root) { -#if REH_MULTIPLICITY - if (aTHX != root) - return; +/* --- Module setup/teardown ----------------------------------------------- */ + +STATIC void xsh_user_global_setup(pTHX) { + PERL_HASH(reh_hash, XSH_PACKAGE, XSH_PACKAGE_LEN); + + reh_private_map = ptable_new(8); + +#ifdef USE_ITHREADS + MUTEX_INIT(&reh_action_list_mutex); + MUTEX_INIT(&reh_private_map_mutex); #endif + return; +} + +STATIC void xsh_user_global_teardown(pTHX) { ptable_private_free(reh_private_map); + +#ifdef USE_ITHREADS + MUTEX_DESTROY(&reh_private_map_mutex); + MUTEX_DESTROY(&reh_action_list_mutex); +#endif + + return; } /* --- XS ------------------------------------------------------------------ */ @@ -360,17 +366,7 @@ PROTOTYPES: ENABLE BOOT: { - reh_private_map = ptable_new(); -#ifdef USE_ITHREADS - MUTEX_INIT(&reh_action_list_mutex); - MUTEX_INIT(&reh_private_map_mutex); -#endif - PERL_HASH(reh_hash, __PACKAGE__, __PACKAGE_LEN__); -#if REH_MULTIPLICITY - call_atexit(reh_teardown, aTHX); -#else - call_atexit(reh_teardown, NULL); -#endif + xsh_setup(); } void @@ -388,9 +384,9 @@ PREINIT: STRLEN len; const char *s; PPCODE: - REH_LOCK(&reh_action_list_mutex); + XSH_LOCK(&reh_action_list_mutex); a = reh_action_list; - REH_UNLOCK(&reh_action_list_mutex); + XSH_UNLOCK(&reh_action_list_mutex); s = SvPV_const(key, len); while (a && !ret) { if (a->klen == len && memcmp(a->key, s, len) == 0) diff --git a/MANIFEST b/MANIFEST index 5c87d6e..1b75a0c 100644 --- a/MANIFEST +++ b/MANIFEST @@ -7,7 +7,6 @@ Makefile.PL README configure_test.pl lib/re/engine/Hooks.pm -ptable.h re_defs.h re_engine_hooks.h re_top.h @@ -106,3 +105,7 @@ t/20-multi.t t/re-engine-Hooks-TestDist/Makefile.PL t/re-engine-Hooks-TestDist/TestDist.xs t/re-engine-Hooks-TestDist/lib/re/engine/Hooks/TestDist.pm +xsh/caps.h +xsh/ptable.h +xsh/threads.h +xsh/util.h diff --git a/ptable.h b/ptable.h deleted file mode 100644 index 30d0df4..0000000 --- a/ptable.h +++ /dev/null @@ -1,251 +0,0 @@ -/* This file is part of the re::engine::Hooks Perl module. - * See http://search.cpan.org/dist/re-engine-Hooks/ */ - -/* This is a pointer table implementation essentially copied from the ptr_table - * implementation in perl's sv.c, except that it has been modified to use memory - * shared across threads. - * Copyright goes to the original authors, bug reports to me. */ - -/* This header is designed to be included several times with different - * definitions for PTABLE_NAME and PTABLE_VAL_FREE(). */ - -#undef VOID2 -#ifdef __cplusplus -# define VOID2(T, P) static_cast(P) -#else -# define VOID2(T, P) (P) -#endif - -#undef pPTBLMS -#undef pPTBLMS_ -#undef aPTBLMS -#undef aPTBLMS_ - -/* Context for PerlMemShared_* functions */ - -#ifdef PERL_IMPLICIT_SYS -# define pPTBLMS pTHX -# define pPTBLMS_ pTHX_ -# define aPTBLMS aTHX -# define aPTBLMS_ aTHX_ -#else -# define pPTBLMS void -# define pPTBLMS_ -# define aPTBLMS -# define aPTBLMS_ -#endif - -#ifndef pPTBL -# define pPTBL pPTBLMS -#endif -#ifndef pPTBL_ -# define pPTBL_ pPTBLMS_ -#endif -#ifndef aPTBL -# define aPTBL aPTBLMS -#endif -#ifndef aPTBL_ -# define aPTBL_ aPTBLMS_ -#endif - -#ifndef PTABLE_NAME -# define PTABLE_NAME ptable -#endif - -#ifndef PTABLE_VAL_FREE -# define PTABLE_VAL_FREE(V) -#endif - -#ifndef PTABLE_JOIN -# define PTABLE_PASTE(A, B) A ## B -# define PTABLE_JOIN(A, B) PTABLE_PASTE(A, B) -#endif - -#ifndef PTABLE_PREFIX -# define PTABLE_PREFIX(X) PTABLE_JOIN(PTABLE_NAME, X) -#endif - -#ifndef ptable_ent -typedef struct ptable_ent { - struct ptable_ent *next; - const void * key; - void * val; -} ptable_ent; -#define ptable_ent ptable_ent -#endif /* !ptable_ent */ - -#ifndef ptable -typedef struct ptable { - ptable_ent **ary; - size_t max; - size_t items; -} ptable; -#define ptable ptable -#endif /* !ptable */ - -#ifndef ptable_new -STATIC ptable *ptable_new(pPTBLMS) { -#define ptable_new() ptable_new(aPTBLMS) - ptable *t = VOID2(ptable *, PerlMemShared_malloc(sizeof *t)); - t->max = 15; - t->items = 0; - t->ary = VOID2(ptable_ent **, - PerlMemShared_calloc(t->max + 1, sizeof *t->ary)); - return t; -} -#endif /* !ptable_new */ - -#ifndef PTABLE_HASH -# define PTABLE_HASH(ptr) \ - ((PTR2UV(ptr) >> 3) ^ (PTR2UV(ptr) >> (3 + 7)) ^ (PTR2UV(ptr) >> (3 + 17))) -#endif - -#ifndef ptable_find -STATIC ptable_ent *ptable_find(const ptable * const t, const void * const key) { -#define ptable_find ptable_find - ptable_ent *ent; - const UV hash = PTABLE_HASH(key); - - ent = t->ary[hash & t->max]; - for (; ent; ent = ent->next) { - if (ent->key == key) - return ent; - } - - return NULL; -} -#endif /* !ptable_find */ - -#ifndef ptable_fetch -STATIC void *ptable_fetch(const ptable * const t, const void * const key) { -#define ptable_fetch ptable_fetch - const ptable_ent *const ent = ptable_find(t, key); - - return ent ? ent->val : NULL; -} -#endif /* !ptable_fetch */ - -#ifndef ptable_split -STATIC void ptable_split(pPTBLMS_ ptable * const t) { -#define ptable_split(T) ptable_split(aPTBLMS_ (T)) - ptable_ent **ary = t->ary; - const size_t oldsize = t->max + 1; - size_t newsize = oldsize * 2; - size_t i; - - ary = VOID2(ptable_ent **, PerlMemShared_realloc(ary, newsize * sizeof(*ary))); - Zero(&ary[oldsize], newsize - oldsize, sizeof(*ary)); - t->max = --newsize; - t->ary = ary; - - for (i = 0; i < oldsize; i++, ary++) { - ptable_ent **curentp, **entp, *ent; - if (!*ary) - continue; - curentp = ary + oldsize; - for (entp = ary, ent = *ary; ent; ent = *entp) { - if ((newsize & PTABLE_HASH(ent->key)) != i) { - *entp = ent->next; - ent->next = *curentp; - *curentp = ent; - continue; - } else - entp = &ent->next; - } - } -} -#endif /* !ptable_split */ - -STATIC void PTABLE_PREFIX(_store)(pPTBL_ ptable * const t, const void * const key, void * const val) { - ptable_ent *ent = ptable_find(t, key); - - if (ent) { - void *oldval = ent->val; - PTABLE_VAL_FREE(oldval); - ent->val = val; - } else if (val) { - const size_t i = PTABLE_HASH(key) & t->max; - ent = VOID2(ptable_ent *, PerlMemShared_malloc(sizeof *ent)); - ent->key = key; - ent->val = val; - ent->next = t->ary[i]; - t->ary[i] = ent; - t->items++; - if (ent->next && t->items > t->max) - ptable_split(t); - } -} - -STATIC void PTABLE_PREFIX(_delete)(pPTBL_ ptable * const t, const void * const key) { - ptable_ent *prev, *ent; - const size_t i = PTABLE_HASH(key) & t->max; - - prev = NULL; - ent = t->ary[i]; - for (; ent; prev = ent, ent = ent->next) { - if (ent->key == key) - break; - } - - if (ent) { - if (prev) - prev->next = ent->next; - else - t->ary[i] = ent->next; - PTABLE_VAL_FREE(ent->val); - PerlMemShared_free(ent); - } -} - -#ifndef ptable_walk -STATIC void ptable_walk(pTHX_ ptable * const t, void (*cb)(pTHX_ ptable_ent *ent, void *userdata), void *userdata) { -#define ptable_walk(T, CB, UD) ptable_walk(aTHX_ (T), (CB), (UD)) - if (t && t->items) { - register ptable_ent ** const array = t->ary; - size_t i = t->max; - do { - ptable_ent *entry; - for (entry = array[i]; entry; entry = entry->next) - if (entry->val) - cb(aTHX_ entry, userdata); - } while (i--); - } -} -#endif /* !ptable_walk */ - -STATIC void PTABLE_PREFIX(_clear)(pPTBL_ ptable * const t) { - if (t && t->items) { - register ptable_ent ** const array = t->ary; - size_t i = t->max; - - do { - ptable_ent *entry = array[i]; - while (entry) { - ptable_ent * const oentry = entry; - void *val = oentry->val; - entry = entry->next; - PTABLE_VAL_FREE(val); - PerlMemShared_free(oentry); - } - array[i] = NULL; - } while (i--); - - t->items = 0; - } -} - -STATIC void PTABLE_PREFIX(_free)(pPTBL_ ptable * const t) { - if (!t) - return; - PTABLE_PREFIX(_clear)(aPTBL_ t); - PerlMemShared_free(t->ary); - PerlMemShared_free(t); -} - -#undef pPTBL -#undef pPTBL_ -#undef aPTBL -#undef aPTBL_ - -#undef PTABLE_NAME -#undef PTABLE_VAL_FREE diff --git a/re_defs.h b/re_defs.h index 6e749d3..1df3739 100644 --- a/re_defs.h +++ b/re_defs.h @@ -1,20 +1,18 @@ -#ifndef REH_HAS_PERL -# define REH_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S)))))) -#endif +#include "xsh/caps.h" /* XSH_HAS_PERL() */ EXTERN_C void reh_save_re_context(pTHX); EXTERN_C regnode *reh_regnext(pTHX_ register regnode *); -#if REH_HAS_PERL(5, 11, 0) +#if XSH_HAS_PERL(5, 11, 0) EXTERN_C REGEXP *reh_pregcomp(pTHX_ SV * const, const U32); #else EXTERN_C REGEXP *reh_pregcomp(pTHX_ const SV * const, const U32); #endif -#if REH_HAS_PERL(5, 11, 2) +#if XSH_HAS_PERL(5, 11, 2) EXTERN_C REGEXP *reh_reg_temp_copy(pTHX_ REGEXP *, REGEXP *); #else EXTERN_C REGEXP *reh_reg_temp_copy(pTHX_ REGEXP *); #endif -#if REH_HAS_PERL(5, 15, 7) +#if XSH_HAS_PERL(5, 15, 7) EXTERN_C SV *reh__invlist_contents(pTHX_ SV* const); #endif diff --git a/xsh/caps.h b/xsh/caps.h new file mode 100644 index 0000000..4559524 --- /dev/null +++ b/xsh/caps.h @@ -0,0 +1,47 @@ +#ifndef XSH_CAPS_H +#define XSH_CAPS_H 1 + +#define XSH_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S)))))) + +#define XSH_HAS_PERL_BRANCH(R, V, S) (PERL_REVISION == (R) && PERL_VERSION == (V) && PERL_SUBVERSION >= (S)) + +#define XSH_HAS_PERL_EXACT(R, V, S) ((PERL_REVISION == (R)) && (PERL_VERSION == (V)) && (PERL_SUBVERSION == (S))) + +#ifndef XSH_PERL_PATCHLEVEL +# ifdef PERL_PATCHNUM +# define XSH_PERL_PATCHLEVEL PERL_PATCHNUM +# else +# define XSH_PERL_PATCHLEVEL 0 +# endif +#endif + +#define XSH_HAS_PERL_MAINT(R, V, S, P) (PERL_REVISION == (R) && PERL_VERSION == (V) && (XSH_PERL_PATCHLEVEL >= (P) || (!XSH_PERL_PATCHLEVEL && PERL_SUBVERSION >= (S)))) + +#ifndef XSH_MULTIPLICITY +# if defined(MULTIPLICITY) +# define XSH_MULTIPLICITY 1 +# else +# define XSH_MULTIPLICITY 0 +# endif +#endif +#if XSH_MULTIPLICITY +# ifndef PERL_IMPLICIT_CONTEXT +# error MULTIPLICITY builds must set PERL_IMPLICIT_CONTEXT +# endif +# ifndef tTHX +# define tTHX PerlInterpreter* +# endif +#endif + +#if XSH_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV)) +# define XSH_THREADSAFE 1 +#else +# define XSH_THREADSAFE 0 +#endif + +/* Safe unless stated otherwise in Makefile.PL */ +#ifndef XSH_FORKSAFE +# define XSH_FORKSAFE 1 +#endif + +#endif /* XSH_CAPS_H */ diff --git a/xsh/ptable.h b/xsh/ptable.h new file mode 100644 index 0000000..af2e168 --- /dev/null +++ b/xsh/ptable.h @@ -0,0 +1,466 @@ +/* This is a pointer table implementation essentially copied from the ptr_table + * implementation in perl's sv.c, except that it has been modified to use memory + * shared across threads. + * Copyright goes to the original authors, bug reports to me. */ + +/* This header is designed to be included several times with different + * definitions for PTABLE_NAME and PTABLE_VAL_ALLOC/FREE(). */ + +#include "util.h" /* VOID2(), XSH_ASSERT(), xPMS */ + +/* --- Configuration ------------------------------------------------------- */ + +#ifndef PTABLE_USE_DEFAULT +# define PTABLE_USE_DEFAULT 0 +#endif + +#if PTABLE_USE_DEFAULT +# if defined(PTABLE_VAL_ALLOC) || defined(PTABLE_VAL_FREE) +# error the default ptable is only available when PTABLE_VAL_ALLOC/FREE are unset +# endif +# undef PTABLE_NAME +# define PTABLE_NAME ptable_default +# undef PTABLE_VAL_NEED_CONTEXT +# define PTABLE_VAL_NEED_CONTEXT 0 +#else +# ifndef PTABLE_NAME +# error PTABLE_NAME must be defined +# endif +# ifndef PTABLE_VAL_NEED_CONTEXT +# define PTABLE_VAL_NEED_CONTEXT 1 +# endif +#endif + +#ifndef PTABLE_JOIN +# define PTABLE_PASTE(A, B) A ## B +# define PTABLE_JOIN(A, B) PTABLE_PASTE(A, B) +#endif + +#ifndef PTABLE_PREFIX +# define PTABLE_PREFIX(X) PTABLE_JOIN(PTABLE_NAME, X) +#endif + +#ifndef PTABLE_NEED_SPLICE +# define PTABLE_NEED_SPLICE 0 +#endif + +#ifndef PTABLE_NEED_WALK +# define PTABLE_NEED_WALK 0 +#endif + +#ifndef PTABLE_NEED_STORE +# define PTABLE_NEED_STORE 1 +#endif + +#ifndef PTABLE_NEED_VIVIFY +# define PTABLE_NEED_VIVIFY 0 +#elif PTABLE_NEED_VIVIFY +# undef PTABLE_NEED_VIVIFY +# ifndef PTABLE_VAL_ALLOC +# error need to define PTABLE_VAL_ALLOC() to use ptable_vivify() +# endif +# define PTABLE_NEED_VIVIFY 1 +#endif + +#ifndef PTABLE_NEED_DELETE +# define PTABLE_NEED_DELETE 1 +#endif + +#ifndef PTABLE_NEED_CLEAR +# define PTABLE_NEED_CLEAR 1 +#endif + +#undef PTABLE_NEED_ENT_VIVIFY +#if PTABLE_NEED_SPLICE || PTABLE_NEED_STORE || PTABLE_NEED_VIVIFY +# define PTABLE_NEED_ENT_VIVIFY 1 +#else +# define PTABLE_NEED_ENT_VIVIFY 0 +#endif + +#undef PTABLE_NEED_ENT_DETACH +#if PTABLE_NEED_SPLICE || PTABLE_NEED_DELETE +# define PTABLE_NEED_ENT_DETACH 1 +#else +# define PTABLE_NEED_ENT_DETACH 0 +#endif + +/* ... Context for ptable_*() functions calling PTABLE_VAL_ALLOC/FREE() .... */ + +#undef pPTBL +#undef pPTBL_ +#undef aPTBL +#undef aPTBL_ + +#if PTABLE_VAL_NEED_CONTEXT +# define pPTBL pTHX +# define pPTBL_ pTHX_ +# define aPTBL aTHX +# define aPTBL_ aTHX_ +#else +# define pPTBL pPMS +# define pPTBL_ pPMS_ +# define aPTBL aPMS +# define aPTBL_ aPMS_ +#endif + +/* --- struct ----------------------------------------------------- */ + +#ifndef ptable_ent +typedef struct ptable_ent { + struct ptable_ent *next; + const void * key; + void * val; +} ptable_ent; +#define ptable_ent ptable_ent +#endif /* !ptable_ent */ + +#ifndef ptable +typedef struct ptable { + ptable_ent **ary; + size_t max; + size_t items; +} ptable; +#define ptable ptable +#endif /* !ptable */ + +/* --- Private interface --------------------------------------------------- */ + +#ifndef PTABLE_HASH +# define PTABLE_HASH(ptr) \ + ((PTR2UV(ptr) >> 3) ^ (PTR2UV(ptr) >> (3 + 7)) ^ (PTR2UV(ptr) >> (3 + 17))) +#endif + +#ifndef ptable_bucket +# define ptable_bucket(T, K) (PTABLE_HASH(K) & (T)->max) +#endif + +#ifndef ptable_ent_find +static ptable_ent *ptable_ent_find(const ptable *t, const void *key) { +#define ptable_ent_find ptable_ent_find + ptable_ent *ent; + const size_t idx = ptable_bucket(t, key); + + ent = t->ary[idx]; + for (; ent; ent = ent->next) { + if (ent->key == key) + return ent; + } + + return NULL; +} +#endif /* !ptable_ent_find */ + +#if PTABLE_NEED_ENT_VIVIFY + +#ifndef ptable_split +static void ptable_split(pPMS_ ptable *t) { +#define ptable_split(T) ptable_split(aPMS_ (T)) + ptable_ent **ary = t->ary; + const size_t old_size = t->max + 1; + size_t new_size = old_size * 2; + size_t i; + + ary = VOID2(ptable_ent **, + PerlMemShared_realloc(ary, new_size * sizeof *ary)); + Zero(ary + old_size, new_size - old_size, sizeof *ary); + t->max = --new_size; + t->ary = ary; + + for (i = 0; i < old_size; i++, ary++) { + ptable_ent **curentp, **entp, *ent; + + ent = *ary; + if (!ent) + continue; + entp = ary; + curentp = ary + old_size; + + do { + if ((new_size & PTABLE_HASH(ent->key)) != i) { + *entp = ent->next; + ent->next = *curentp; + *curentp = ent; + } else { + entp = &ent->next; + } + ent = *entp; + } while (ent); + } +} +#endif /* !ptable_split */ + +#ifndef ptable_ent_vivify +static ptable_ent *ptable_ent_vivify(pPMS_ ptable *t, const void *key) { +#define ptable_ent_vivify(T, K) ptable_ent_vivify(aPMS_ (T), (K)) + ptable_ent *ent; + const size_t idx = ptable_bucket(t, key); + + ent = t->ary[idx]; + for (; ent; ent = ent->next) { + if (ent->key == key) + return ent; + } + + ent = VOID2(ptable_ent *, PerlMemShared_malloc(sizeof *ent)); + + ent->key = key; + ent->val = NULL; + ent->next = t->ary[idx]; + t->ary[idx] = ent; + + t->items++; + if (ent->next && t->items > t->max) + ptable_split(t); + + return ent; +} +#endif /* !ptable_ent_vivify */ + +#endif /* PTABLE_NEED_ENT_VIVIFY */ + +#if PTABLE_NEED_ENT_DETACH + +#ifndef ptable_ent_detach +static ptable_ent *ptable_ent_detach(ptable *t, const void *key) { +#define ptable_ent_detach ptable_ent_detach + ptable_ent *prev, *ent; + const size_t idx = ptable_bucket(t, key); + + prev = NULL; + ent = t->ary[idx]; + for (; ent; prev = ent, ent = ent->next) { + if (ent->key == key) { + if (prev) + prev->next = ent->next; + else + t->ary[idx] = ent->next; + break; + } + } + + return ent; +} +#endif /* !ptable_ent_detach */ + +#endif /* PTABLE_NEED_ENT_DETACH */ + +/* --- Public interface ---------------------------------------------------- */ + +/* ... Common symbols ...................................................... */ + +#ifndef ptable_new +static ptable *ptable_new(pPMS_ size_t init_buckets) { +#define ptable_new(B) ptable_new(aPMS_ (B)) + ptable *t; + + if (init_buckets < 4) { + init_buckets = 4; + } else { + init_buckets--; + init_buckets |= init_buckets >> 1; + init_buckets |= init_buckets >> 2; + init_buckets |= init_buckets >> 4; + init_buckets |= init_buckets >> 8; + init_buckets |= init_buckets >> 16; + if (sizeof(init_buckets) > 4) + init_buckets |= init_buckets >> 32; + init_buckets++; + } + + XSH_ASSERT(init_buckets >= 4 && ((init_buckets & (init_buckets - 1)) == 0)); + + t = VOID2(ptable *, PerlMemShared_malloc(sizeof *t)); + t->max = init_buckets - 1; + t->items = 0; + t->ary = VOID2(ptable_ent **, + PerlMemShared_calloc(t->max + 1, sizeof *t->ary)); + return t; +} +#endif /* !ptable_new */ + +#ifndef ptable_fetch +static void *ptable_fetch(const ptable *t, const void *key) { +#define ptable_fetch ptable_fetch + const ptable_ent *ent = ptable_ent_find(t, key); + + return ent ? ent->val : NULL; +} +#endif /* !ptable_fetch */ + +#if PTABLE_NEED_SPLICE + +#ifndef ptable_splice +static void *ptable_splice(pPMS_ ptable *t, const void *key, void *new_val) { +#define ptable_splice(T, K, V) ptable_splice(aPMS_ (T), (K), (V)) + ptable_ent *ent; + void *old_val = NULL; + + if (new_val) { + ent = ptable_ent_vivify(t, key); + old_val = ent->val; + ent->val = new_val; + } else { + ent = ptable_ent_detach(t, key); + if (ent) { + old_val = ent->val; + PerlMemShared_free(ent); + } + } + + return old_val; +} +#endif /* !ptable_splice */ + +#endif /* PTABLE_NEED_SPLICE */ + +#if PTABLE_NEED_WALK + +#ifndef ptable_walk +static void ptable_walk(pTHX_ ptable *t, void (*cb)(pTHX_ ptable_ent *ent, void *userdata), void *userdata) { +#define ptable_walk(T, CB, UD) ptable_walk(aTHX_ (T), (CB), (UD)) + if (t && t->items) { + register ptable_ent **array = t->ary; + size_t i = t->max; + do { + ptable_ent *entry; + for (entry = array[i]; entry; entry = entry->next) + if (entry->val) + cb(aTHX_ entry, userdata); + } while (i--); + } +} +#endif /* !ptable_walk */ + +#endif /* PTABLE_NEED_WALK */ + +/* ... Specialized symbols ................................................. */ + +#if PTABLE_NEED_STORE + +#if !PTABLE_USE_DEFAULT || !defined(ptable_default_store) +static void PTABLE_PREFIX(_store)(pPTBL_ ptable *t, const void *key, void *val){ + ptable_ent *ent = ptable_ent_vivify(t, key); + +#ifdef PTABLE_VAL_FREE + PTABLE_VAL_FREE(ent->val); +#endif + + ent->val = val; + + return; +} +# if PTABLE_USE_DEFAULT +# define ptable_default_store ptable_default_store +# endif +#endif /* !PTABLE_USE_DEFAULT || !defined(ptable_default_store) */ + +#endif /* PTABLE_NEED_STORE */ + +#if PTABLE_NEED_VIVIFY + +#if !PTABLE_USE_DEFAULT || !defined(ptable_default_vivify) +static void *PTABLE_PREFIX(_vivify)(pPTBL_ ptable *t, const void *key) { + ptable_ent *ent = ptable_ent_vivify(t, key); + + if (!ent->val) { + PTABLE_VAL_ALLOC(ent->val); + } + + return ent->val; +} +# if PTABLE_USE_DEFAULT +# define ptable_default_vivify ptable_default_vivify +# endif +#endif /* !PTABLE_USE_DEFAULT || !defined(ptable_default_vivify) */ + +#endif /* PTABLE_NEED_VIVIFY */ + +#if PTABLE_NEED_DELETE + +#if !PTABLE_USE_DEFAULT || !defined(ptable_default_delete) +static void PTABLE_PREFIX(_delete)(pPTBL_ ptable *t, const void *key) { + ptable_ent *ent = ptable_ent_detach(t, key); + +#ifdef PTABLE_VAL_FREE + if (ent) { + PTABLE_VAL_FREE(ent->val); + } +#endif + + PerlMemShared_free(ent); +} +# if PTABLE_USE_DEFAULT +# define ptable_default_delete ptable_default_delete +# endif +#endif /* !PTABLE_USE_DEFAULT || !defined(ptable_default_delete) */ + +#endif /* PTABLE_NEED_DELETE */ + +#if PTABLE_NEED_CLEAR + +#if !PTABLE_USE_DEFAULT || !defined(ptable_default_clear) +static void PTABLE_PREFIX(_clear)(pPTBL_ ptable *t) { + if (t && t->items) { + register ptable_ent **array = t->ary; + size_t idx = t->max; + + do { + ptable_ent *entry = array[idx]; + while (entry) { + ptable_ent *nentry = entry->next; +#ifdef PTABLE_VAL_FREE + PTABLE_VAL_FREE(entry->val); +#endif + PerlMemShared_free(entry); + entry = nentry; + } + array[idx] = NULL; + } while (idx--); + + t->items = 0; + } +} +# if PTABLE_USE_DEFAULT +# define ptable_default_clear ptable_default_clear +# endif +#endif /* !PTABLE_USE_DEFAULT || !defined(ptable_default_clear) */ + +#endif /* PTABLE_NEED_CLEAR */ + +#if !PTABLE_USE_DEFAULT || !defined(ptable_default_free) +static void PTABLE_PREFIX(_free)(pPTBL_ ptable *t) { + if (!t) + return; + PTABLE_PREFIX(_clear)(aPTBL_ t); + PerlMemShared_free(t->ary); + PerlMemShared_free(t); +} +# if PTABLE_USE_DEFAULT +# define ptable_default_free ptable_default_free +# endif +#endif /* !PTABLE_USE_DEFAULT || !defined(ptable_default_free) */ + +/* --- Cleanup ------------------------------------------------------------- */ + +#undef PTABLE_WAS_DEFAULT +#if PTABLE_USE_DEFAULT +# define PTABLE_WAS_DEFAULT 1 +#else +# define PTABLE_WAS_DEFAULT 0 +#endif + +#undef PTABLE_NAME +#undef PTABLE_VAL_ALLOC +#undef PTABLE_VAL_FREE +#undef PTABLE_VAL_NEED_CONTEXT +#undef PTABLE_USE_DEFAULT + +#undef PTABLE_NEED_SPLICE +#undef PTABLE_NEED_WALK +#undef PTABLE_NEED_STORE +#undef PTABLE_NEED_VIVIFY +#undef PTABLE_NEED_DELETE +#undef PTABLE_NEED_CLEAR + +#undef PTABLE_NEED_ENT_VIVIFY +#undef PTABLE_NEED_ENT_DETACH diff --git a/xsh/threads.h b/xsh/threads.h new file mode 100644 index 0000000..b72c63b --- /dev/null +++ b/xsh/threads.h @@ -0,0 +1,501 @@ +#ifndef XSH_THREADS_H +#define XSH_THREADS_H 1 + +#include "caps.h" /* XSH_HAS_PERL(), XSH_THREADSAFE */ +#include "util.h" /* XSH_PACKAGE, dNOOP, NOOP */ + +#ifndef XSH_THREADS_COMPILE_TIME_PROTECTION +# define XSH_THREADS_COMPILE_TIME_PROTECTION 0 +#endif + +#ifndef XSH_THREADS_USER_CONTEXT +# define XSH_THREADS_USER_CONTEXT 1 +#endif + +#ifndef XSH_THREADS_USER_GLOBAL_SETUP +# define XSH_THREADS_USER_GLOBAL_SETUP 1 +#endif + +#ifndef XSH_THREADS_USER_LOCAL_SETUP +# define XSH_THREADS_USER_LOCAL_SETUP 1 +#endif + +#ifndef XSH_THREADS_USER_LOCAL_TEARDOWN +# define XSH_THREADS_USER_LOCAL_TEARDOWN 1 +#endif + +#ifndef XSH_THREADS_USER_GLOBAL_TEARDOWN +# define XSH_THREADS_USER_GLOBAL_TEARDOWN 1 +#endif + +#ifndef XSH_THREADS_PEEP_CONTEXT +# define XSH_THREADS_PEEP_CONTEXT 0 +#endif + +#ifndef XSH_THREADS_HINTS_CONTEXT +# define XSH_THREADS_HINTS_CONTEXT 0 +#endif + +#ifndef XSH_THREADS_USER_CLONE_NEEDS_DUP +# define XSH_THREADS_USER_CLONE_NEEDS_DUP 0 +#endif + +#if XSH_THREADSAFE && (XSH_THREADS_HINTS_CONTEXT || XSH_THREADS_USER_CLONE_NEEDS_DUP) +# define XSH_THREADS_CLONE_NEEDS_DUP 1 +#else +# define XSH_THREADS_CLONE_NEEDS_DUP 0 +#endif + +#if defined(XSH_OPS_H) && (!XSH_THREADS_GLOBAL_SETUP || !XSH_THREADS_GLOBAL_TEARDOWN) +# error settting up hook check functions require global setup/teardown +#endif + +#ifndef XSH_THREADS_NEED_TEARDOWN_LATE +# define XSH_THREADS_NEED_TEARDOWN_LATE 0 +#endif + +#if XSH_THREADS_NEED_TEARDOWN_LATE && (!XSH_THREADS_USER_LOCAL_TEARDOWN || !XSH_THREADS_USER_GLOBAL_TEARDOWN) +# error you need to declare local or global teardown handlers to use the late teardown feature +#endif + +#if XSH_THREADSAFE +# ifndef MY_CXT_CLONE +# define MY_CXT_CLONE \ + dMY_CXT_SV; \ + my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \ + Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \ + sv_setuv(my_cxt_sv, PTR2UV(my_cxtp)) +# endif +#else +# undef dMY_CXT +# define dMY_CXT dNOOP +# undef MY_CXT +# define MY_CXT xsh_globaldata +# undef START_MY_CXT +# define START_MY_CXT static my_cxt_t MY_CXT; +# undef MY_CXT_INIT +# define MY_CXT_INIT NOOP +# undef MY_CXT_CLONE +# define MY_CXT_CLONE NOOP +#endif + +#if XSH_THREADSAFE +/* We must use preexistent global mutexes or we will never be able to destroy + * them. */ +# if XSH_HAS_PERL(5, 9, 3) +# define XSH_LOADED_LOCK MUTEX_LOCK(&PL_my_ctx_mutex) +# define XSH_LOADED_UNLOCK MUTEX_UNLOCK(&PL_my_ctx_mutex) +# else +# define XSH_LOADED_LOCK OP_REFCNT_LOCK +# define XSH_LOADED_UNLOCK OP_REFCNT_UNLOCK +# endif +#else +# define XSH_LOADED_LOCK NOOP +# define XSH_LOADED_UNLOCK NOOP +#endif + +static I32 xsh_loaded = 0; + +#if XSH_THREADSAFE && XSH_THREADS_COMPILE_TIME_PROTECTION + +#define PTABLE_USE_DEFAULT 1 + +#include "ptable.h" + +#define ptable_loaded_store(T, K, V) ptable_default_store(aPTBL_ (T), (K), (V)) +#define ptable_loaded_delete(T, K) ptable_default_delete(aPTBL_ (T), (K)) +#define ptable_loaded_free(T) ptable_default_free(aPTBL_ (T)) + +static ptable *xsh_loaded_cxts = NULL; + +static int xsh_is_loaded(pTHX_ void *cxt) { +#define xsh_is_loaded(C) xsh_is_loaded(aTHX_ (C)) + int res = 0; + + XSH_LOADED_LOCK; + if (xsh_loaded_cxts && ptable_fetch(xsh_loaded_cxts, cxt)) + res = 1; + XSH_LOADED_UNLOCK; + + return res; +} + +static int xsh_set_loaded_locked(pTHX_ void *cxt) { +#define xsh_set_loaded_locked(C) xsh_set_loaded_locked(aTHX_ (C)) + int global_setup = 0; + + if (xsh_loaded <= 0) { + XSH_ASSERT(xsh_loaded == 0); + XSH_ASSERT(!xsh_loaded_cxts); + xsh_loaded_cxts = ptable_new(4); + global_setup = 1; + } + ++xsh_loaded; + XSH_ASSERT(xsh_loaded_cxts); + ptable_loaded_store(xsh_loaded_cxts, cxt, cxt); + + return global_setup; +} + +static int xsh_clear_loaded_locked(pTHX_ void *cxt) { +#define xsh_clear_loaded_locked(C) xsh_clear_loaded_locked(aTHX_ (C)) + int global_teardown = 0; + + if (xsh_loaded > 1) { + XSH_ASSERT(xsh_loaded_cxts); + ptable_loaded_delete(xsh_loaded_cxts, cxt); + --xsh_loaded; + } else if (xsh_loaded_cxts) { + XSH_ASSERT(xsh_loaded == 1); + ptable_loaded_free(xsh_loaded_cxts); + xsh_loaded_cxts = NULL; + xsh_loaded = 0; + global_teardown = 1; + } + + return global_teardown; +} + +#else /* XSH_THREADS_COMPILE_TIME_PROTECTION */ + +#define xsh_is_loaded_locked(C) (xsh_loaded > 0) +#define xsh_set_loaded_locked(C) ((xsh_loaded++ <= 0) ? 1 : 0) +#define xsh_clear_loaded_locked(C) ((--xsh_loaded <= 0) ? 1 : 0) + +#if XSH_THREADSAFE + +static int xsh_is_loaded(pTHX_ void *cxt) { +#define xsh_is_loaded(C) xsh_is_loaded(aTHX_ (C)) + int res = 0; + + XSH_LOADED_LOCK; + res = xsh_is_loaded_locked(cxt); + XSH_LOADED_UNLOCK; + + return res; +} + +#else + +#define xsh_is_loaded(C) xsh_is_loaded_locked(C) + +#endif + +#endif /* !XSH_THREADS_COMPILE_TIME_PROTECTION */ + +#define MY_CXT_KEY XSH_PACKAGE "::_guts" XS_VERSION + +typedef struct { +#if XSH_THREADS_USER_CONTEXT + xsh_user_cxt_t cxt_user; +#endif +#if XSH_THREADS_PEEP_CONTEXT + xsh_peep_cxt_t cxt_peep; +#endif +#if XSH_THREADS_HINTS_CONTEXT + xsh_hints_cxt_t cxt_hints; +#endif +#if XSH_THREADS_CLONE_NEEDS_DUP + tTHX owner; +#endif +#if !(XSH_THREADS_USER_CONTEXT || XSH_THREADS_PEEP_CONTEXT || XSH_THREADS_HINTS_CONTEXT || XSH_THREADS_CLONE_NEEDS_DUP) + int dummy; +#endif +} my_cxt_t; + +START_MY_CXT + +#if XSH_THREADS_USER_CONTEXT +# define dXSH_CXT dMY_CXT +# define XSH_CXT (MY_CXT.cxt_user) +#endif + +#if XSH_THREADS_USER_GLOBAL_SETUP +static void xsh_user_global_setup(pTHX); +#endif + +#if XSH_THREADS_USER_LOCAL_SETUP +# if XSH_THREADS_USER_CONTEXT +static void xsh_user_local_setup(pTHX_ xsh_user_cxt_t *cxt); +# else +static void xsh_user_local_setup(pTHX); +# endif +#endif + +#if XSH_THREADS_USER_LOCAL_TEARDOWN +# if XSH_THREADS_USER_CONTEXT +static void xsh_user_local_teardown(pTHX_ xsh_user_cxt_t *cxt); +# else +static void xsh_user_local_teardown(pTHX); +# endif +#endif + +#if XSH_THREADS_USER_GLOBAL_TEARDOWN +static void xsh_user_global_teardown(pTHX); +#endif + +#if XSH_THREADSAFE && XSH_THREADS_USER_CONTEXT +# if XSH_THREADS_USER_CLONE_NEEDS_DUP +static void xsh_user_clone(pTHX_ const xsh_user_cxt_t *old_cxt, xsh_user_cxt_t *new_cxt, CLONE_PARAMS *params); +# else +static void xsh_user_clone(pTHX_ const xsh_user_cxt_t *old_cxt, xsh_user_cxt_t *new_cxt); +# endif +#endif + +#if XSH_THREADS_PEEP_CONTEXT +static xsh_peep_cxt_t *xsh_peep_get_cxt(pTHX) { + dMY_CXT; + XSH_ASSERT(xsh_is_loaded(&MY_CXT)); + return &MY_CXT.cxt_peep; +} +#endif + +#if XSH_THREADS_HINTS_CONTEXT +static xsh_hints_cxt_t *xsh_hints_get_cxt(pTHX) { + dMY_CXT; + XSH_ASSERT(xsh_is_loaded(&MY_CXT)); + return &MY_CXT.cxt_hints; +} +#endif + +#if XSH_THREADS_NEED_TEARDOWN_LATE + +typedef void (*xsh_teardown_late_cb)(pTHX_ void *ud); + +static int xsh_teardown_late_simple_free(pTHX_ SV *sv, MAGIC *mg) { + xsh_teardown_late_cb cb; + + cb = DPTR2FPTR(xsh_teardown_late_cb, mg->mg_ptr); + + XSH_LOADED_LOCK; + if (xsh_loaded == 0) + cb(aTHX_ NULL); + XSH_LOADED_UNLOCK; + + return 0; +} + +static MGVTBL xsh_teardown_late_simple_vtbl = { + 0, + 0, + 0, + 0, + xsh_teardown_late_simple_free +#if MGf_COPY + , 0 +#endif +#if MGf_DUP + , 0 +#endif +#if MGf_LOCAL + , 0 +#endif +}; + +typedef struct { + xsh_teardown_late_cb cb; + void *ud; +} xsh_teardown_late_token; + +static int xsh_teardown_late_arg_free(pTHX_ SV *sv, MAGIC *mg) { + xsh_teardown_late_token *tok; + + tok = (xsh_teardown_late_token *) mg->mg_ptr; + + XSH_LOADED_LOCK; + if (xsh_loaded == 0) + tok->cb(aTHX_ tok->ud); + XSH_LOADED_UNLOCK; + + PerlMemShared_free(tok); + + return 0; +} + +static MGVTBL xsh_teardown_late_arg_vtbl = { + 0, + 0, + 0, + 0, + xsh_teardown_late_arg_free +#if MGf_COPY + , 0 +#endif +#if MGf_DUP + , 0 +#endif +#if MGf_LOCAL + , 0 +#endif +}; + +static void xsh_teardown_late_register(pTHX_ xsh_teardown_late_cb cb, void *ud){ +#define xsh_teardown_late_register(CB, UD) xsh_teardown_late_register(aTHX_ (CB), (UD)) + void *ptr; + + if (!ud) { + ptr = FPTR2DPTR(void *, cb); + } else { + xsh_teardown_late_token *tok; + + tok = PerlMemShared_malloc(sizeof *tok); + tok->cb = cb; + tok->ud = ud; + + ptr = tok; + } + + if (!PL_strtab) + PL_strtab = newHV(); + + sv_magicext((SV *) PL_strtab, NULL, PERL_MAGIC_ext, + ud ? &xsh_teardown_late_arg_vtbl : &xsh_teardown_late_simple_vtbl, + ptr, 0); + + return; +} + +#endif /* XSH_THREADS_NEED_TEARDOWN_LATE */ + +static void xsh_teardown(pTHX_ void *root) { + dMY_CXT; + +#if XSH_THREADS_USER_LOCAL_TEARDOWN +# if XSH_THREADS_USER_CONTEXT + xsh_user_local_teardown(aTHX_ &XSH_CXT); +# else + xsh_user_local_teardown(aTHX); +# endif +#endif + +#if XSH_THREADS_PEEP_CONTEXT + xsh_peep_local_teardown(aTHX_ &MY_CXT.cxt_peep); +#endif + +#if XSH_THREADS_HINTS_CONTEXT + xsh_hints_local_teardown(aTHX_ &MY_CXT.cxt_hints); +#endif + + XSH_LOADED_LOCK; + + if (xsh_clear_loaded_locked(&MY_CXT)) { +#if XSH_THREADS_USER_GLOBAL_TEARDOWN + xsh_user_global_teardown(aTHX); +#endif + +#if XSH_THREADS_HINTS_CONTEXT + xsh_hints_global_teardown(aTHX); +#endif + } + + XSH_LOADED_UNLOCK; + + return; +} + +static void xsh_setup(pTHX) { +#define xsh_setup() xsh_setup(aTHX) + MY_CXT_INIT; /* Takes/release PL_my_ctx_mutex */ + + XSH_LOADED_LOCK; + + if (xsh_set_loaded_locked(&MY_CXT)) { +#if XSH_THREADS_HINTS_CONTEXT + xsh_hints_global_setup(aTHX); +#endif + +#if XSH_THREADS_USER_GLOBAL_SETUP + xsh_user_global_setup(aTHX); +#endif + } + + XSH_LOADED_UNLOCK; + +#if XSH_THREADS_CLONE_NEEDS_DUP + MY_CXT.owner = aTHX; +#endif + +#if XSH_THREADS_HINTS_CONTEXT + xsh_hints_local_setup(aTHX_ &MY_CXT.cxt_hints); +#endif + +#if XSH_THREADS_PEEP_CONTEXT + xsh_peep_local_setup(aTHX_ &MY_CXT.cxt_peep); +#endif + +#if XSH_THREADS_USER_LOCAL_SETUP +# if XSH_THREADS_USER_CONTEXT + xsh_user_local_setup(aTHX_ &XSH_CXT); +# else + xsh_user_local_setup(aTHX); +# endif +#endif + + call_atexit(xsh_teardown, NULL); + + return; +} + +#if XSH_THREADSAFE + +static void xsh_clone(pTHX) { +#define xsh_clone() xsh_clone(aTHX) + const my_cxt_t *old_cxt; + my_cxt_t *new_cxt; + + { + dMY_CXT; + old_cxt = &MY_CXT; + } + + { + int global_setup; + + MY_CXT_CLONE; + new_cxt = &MY_CXT; + + XSH_LOADED_LOCK; + global_setup = xsh_set_loaded_locked(new_cxt); + XSH_ASSERT(!global_setup); + XSH_LOADED_UNLOCK; + +#if XSH_THREADS_CLONE_NEEDS_DUP + new_cxt->owner = aTHX; +#endif + } + + { +#if XSH_THREADS_CLONE_NEEDS_DUP + XSH_DUP_PARAMS_TYPE params; + xsh_dup_params_init(params, old_cxt->owner); +#endif + +#if XSH_THREADS_PEEP_CONTEXT + xsh_peep_clone(aTHX_ &old_cxt->cxt_peep, &new_cxt->cxt_peep); +#endif + +#if XSH_THREADS_HINTS_CONTEXT + xsh_hints_clone(aTHX_ &old_cxt->cxt_hints, &new_cxt->cxt_hints, + xsh_dup_params_ptr(params)); +#endif + +#if XSH_THREADS_USER_CONTEXT +# if XSH_THREADS_USER_CLONE_NEEDS_DUP + xsh_user_clone(aTHX_ &old_cxt->cxt_user, &new_cxt->cxt_user, + xsh_dup_params_ptr(params)); +# else + xsh_user_clone(aTHX_ &old_cxt->cxt_user, &new_cxt->cxt_user); +# endif +#endif + +#if XSH_THREADS_CLONE_NEEDS_DUP + xsh_dup_params_deinit(params); +#endif + } + + return; +} + +#endif /* XSH_THREADSAFE */ + +#endif /* XSH_THREADS_H */ diff --git a/xsh/util.h b/xsh/util.h new file mode 100644 index 0000000..dcc142c --- /dev/null +++ b/xsh/util.h @@ -0,0 +1,97 @@ +#ifndef XSH_UTIL_H +#define XSH_UTIL_H 1 + +#include "caps.h" /* XSH_HAS_PERL() */ + +#ifndef XSH_PACKAGE +# error XSH_PACKAGE must be defined +#endif + +#define XSH_PACKAGE_LEN (sizeof(XSH_PACKAGE)-1) + +#ifdef DEBUGGING +# if XSH_HAS_PERL(5, 8, 9) || XSH_HAS_PERL(5, 9, 3) +# define XSH_ASSERT(C) assert(C) +# else +# define XSH_ASSERT(C) PERL_DEB( \ + ((C) ? ((void) 0) \ + : (Perl_croak_nocontext("Assertion %s failed: file \"" __FILE__ \ + "\", line %d", STRINGIFY(C), __LINE__), \ + (void) 0))) +# endif +#else +# define XSH_ASSERT(C) +#endif + +#undef VOID2 +#ifdef __cplusplus +# define VOID2(T, P) static_cast(P) +#else +# define VOID2(T, P) (P) +#endif + +#ifndef STMT_START +# define STMT_START do +#endif + +#ifndef STMT_END +# define STMT_END while (0) +#endif + +#ifndef dNOOP +# define dNOOP +#endif + +#ifndef NOOP +# define NOOP +#endif + +#if XSH_HAS_PERL(5, 13, 2) +# define XSH_DUP_PARAMS_TYPE CLONE_PARAMS * +# define xsh_dup_params_init(P, O) ((P) = Perl_clone_params_new((O), aTHX)) +# define xsh_dup_params_deinit(P) Perl_clone_params_del(P) +# define xsh_dup_params_ptr(P) (P) +#else +# define XSH_DUP_PARAMS_TYPE CLONE_PARAMS +# define xsh_dup_params_init(P, O) \ + ((P).stashes = newAV()); (P).flags = 0; ((P).proto_perl = (O)) +# define xsh_dup_params_deinit(P) SvREFCNT_dec((P).stashes) +# define xsh_dup_params_ptr(P) &(P) +#endif +#define xsh_dup(S, P) sv_dup((S), (P)) +#define xsh_dup_inc(S, P) SvREFCNT_inc(xsh_dup((S), (P))) + +/* Context for PerlMemShared_*() functions */ +#ifdef PERL_IMPLICIT_SYS +# define pPMS pTHX +# define pPMS_ pTHX_ +# define aPMS aTHX +# define aPMS_ aTHX_ +#else +# define pPMS void +# define pPMS_ +# define aPMS +# define aPMS_ +#endif + +#ifdef USE_ITHREADS +# define XSH_LOCK(M) MUTEX_LOCK(M) +# define XSH_UNLOCK(M) MUTEX_UNLOCK(M) +#else +# define XSH_LOCK(M) NOOP +# define XSH_UNLOCK(M) NOOP +#endif + +#ifndef PTR2nat +# define PTR2nat(p) (PTRV)(p) +#endif + +#ifndef DPTR2FPTR +# define DPTR2FPTR(t,p) ((t)PTR2nat(p)) +#endif + +#ifndef FPTR2DPTR +# define FPTR2DPTR(t,p) ((t)PTR2nat(p)) +#endif + +#endif /* XSH_UTIL_H */