From: Vincent Pit Date: Thu, 5 Nov 2015 12:26:33 +0000 (-0200) Subject: Initial commit X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2FVPIT-XSHelpers.git;a=commitdiff_plain;h=8f56335903e672d1f92fb8323571ac3078aae468 Initial commit --- 8f56335903e672d1f92fb8323571ac3078aae468 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/debug.h b/xsh/debug.h new file mode 100644 index 0000000..707c760 --- /dev/null +++ b/xsh/debug.h @@ -0,0 +1,27 @@ +#ifndef XSH_DEBUG_H +#define XSH_DEBUG_H 1 + +#include "util.h" /* XSH_PACKAGE, STMT_* */ + +#ifndef XSH_DEBUG +# define XSH_DEBUG 0 +#endif + +#if XSH_DEBUG +# define XSH_D(X) STMT_START X STMT_END +static void xsh_debug_log(const char *fmt, ...) { + va_list va; + SV *sv; + dTHX; + va_start(va, fmt); + sv = get_sv(XSH_PACKAGE "::DEBUG", 0); + if (sv && SvTRUE(sv)) + PerlIO_vprintf(Perl_debug_log, fmt, va); + va_end(va); + return; +} +#else +# define XSH_D(X) +#endif + +#endif /* XSH_DEBUG_H */ diff --git a/xsh/hints.h b/xsh/hints.h new file mode 100644 index 0000000..458b117 --- /dev/null +++ b/xsh/hints.h @@ -0,0 +1,372 @@ +#ifndef XSH_HINTS_H +#define XSH_HINTS_H 1 + +#include "caps.h" /* XSH_HAS_PERL(), XSH_THREADSAFE, tTHX */ + +#ifdef XSH_THREADS_H +# error threads.h must be loaded at the very end +#endif + +#define XSH_HINTS_KEY XSH_PACKAGE +#define XSH_HINTS_KEY_LEN (sizeof(XSH_HINTS_KEY)-1) + +#ifndef XSH_WORKAROUND_REQUIRE_PROPAGATION +# define XSH_WORKAROUND_REQUIRE_PROPAGATION !XSH_HAS_PERL(5, 10, 1) +#endif + +#ifndef XSH_HINTS_ONLY_COMPILE_TIME +# define XSH_HINTS_ONLY_COMPILE_TIME 1 +#endif + +#ifdef XSH_HINTS_TYPE_UV +# ifdef XSH_HINTS_TYPE_VAL +# error hint type can only be set once +# endif +# undef XSH_HINTS_TYPE_UV +# define XSH_HINTS_TYPE_UV 1 +# define XSH_HINTS_TYPE_STRUCT UV +# define XSH_HINTS_TYPE_COMPACT UV +# define XSH_HINTS_NEED_STRUCT 0 +# define XSH_HINTS_VAL_STRUCT_REF 0 +# define XSH_HINTS_VAL_NONE 0 +# define XSH_HINTS_VAL_PACK(T, V) INT2PTR(T, (V)) +# define XSH_HINTS_VAL_UNPACK(V) ((XSH_HINTS_TYPE_VAL) PTR2UV(V)) +# define XSH_HINTS_VAL_INIT(HV, V) ((HV) = (V)) +# undef XSH_HINTS_VAL_CLONE +# undef XSH_HINTS_VAL_DEINIT +#endif + +#ifdef XSH_HINTS_TYPE_SV +# ifdef XSH_HINTS_TYPE_VAL +# error hint type can only be set once +# endif +# undef XSH_HINTS_TYPE_SV +# define XSH_HINTS_TYPE_SV 1 +# define XSH_HINTS_TYPE_STRUCT SV * +# define XSH_HINTS_TYPE_COMPACT SV +# define XSH_HINTS_NEED_STRUCT 0 +# define XSH_HINTS_VAL_STRUCT_REF 0 +# define XSH_HINTS_VAL_NONE NULL +# define XSH_HINTS_VAL_PACK(T, V) (V) +# define XSH_HINTS_VAL_UNPACK(V) (V) +# define XSH_HINTS_VAL_INIT(HV, V) ((HV) = (((V) != XSH_HINTS_VAL_NONE) ? SvREFCNT_inc(V) : XSH_HINTS_VAL_NONE)) +# define XSH_HINTS_VAL_CLONE(N, O) ((N) = xsh_dup_inc((O), ud->params)) +# define XSH_HINTS_VAL_DEINIT(V) SvREFCNT_dec(V) +#endif + +#ifdef XSH_HINTS_TYPE_USER +# ifdef XSH_HINTS_TYPE_VAL +# error hint type can only be set once +# endif +# undef XSH_HINTS_TYPE_USER +# define XSH_HINTS_TYPE_USER 1 +# define XSH_HINTS_TYPE_STRUCT xsh_hints_user_t +# undef XSH_HINTS_TYPE_COMPACT /* not used */ +# define XSH_HINTS_NEED_STRUCT 1 +# define XSH_HINTS_VAL_STRUCT_REF 1 +# define XSH_HINTS_VAL_NONE NULL +# define XSH_HINTS_VAL_PACK(T, V) (V) +# define XSH_HINTS_VAL_UNPACK(V) (V) +# define XSH_HINTS_VAL_INIT(HV, V) xsh_hints_user_init(aTHX_ (HV), (V)) +# define XSH_HINTS_VAL_CLONE(NV, OV) xsh_hints_user_clone(aTHX_ (NV), (OV), ud->params) +# define XSH_HINTS_VAL_DEINIT(V) xsh_hints_user_deinit(aTHX_ (V)) +#endif + +#ifndef XSH_HINTS_TYPE_STRUCT +# error hint type was not set +#endif + +#if XSH_HINTS_VAL_STRUCT_REF +# define XSH_HINTS_TYPE_VAL XSH_HINTS_TYPE_STRUCT * +#else +# define XSH_HINTS_TYPE_VAL XSH_HINTS_TYPE_STRUCT +#endif + +#if XSH_WORKAROUND_REQUIRE_PROPAGATION +# undef XSH_HINTS_NEED_STRUCT +# define XSH_HINTS_NEED_STRUCT 1 +#endif + +#if XSH_THREADSAFE && (defined(XSH_HINTS_VAL_CLONE) || XSH_WORKAROUND_REQUIRE_PROPAGATION) +# define XSH_HINTS_NEED_CLONE 1 +#else +# define XSH_HINTS_NEED_CLONE 0 +#endif + +#if XSH_WORKAROUND_REQUIRE_PROPAGATION + +static UV xsh_require_tag(pTHX) { +#define xsh_require_tag() xsh_require_tag(aTHX) + const CV *cv, *outside; + + cv = PL_compcv; + + if (!cv) { + /* If for some reason the pragma is operational at run-time, try to discover + * the current cv in use. */ + const PERL_SI *si; + + for (si = PL_curstackinfo; si; si = si->si_prev) { + I32 cxix; + + for (cxix = si->si_cxix; cxix >= 0; --cxix) { + const PERL_CONTEXT *cx = si->si_cxstack + cxix; + + switch (CxTYPE(cx)) { + case CXt_SUB: + case CXt_FORMAT: + /* The propagation workaround is only needed up to 5.10.0 and at that + * time format and sub contexts were still identical. And even later the + * cv members offsets should have been kept the same. */ + cv = cx->blk_sub.cv; + goto get_enclosing_cv; + case CXt_EVAL: + cv = cx->blk_eval.cv; + goto get_enclosing_cv; + default: + break; + } + } + } + + cv = PL_main_cv; + } + +get_enclosing_cv: + for (outside = CvOUTSIDE(cv); outside; outside = CvOUTSIDE(cv)) + cv = outside; + + return PTR2UV(cv); +} + +#endif /* XSH_WORKAROUND_REQUIRE_PROPAGATION */ + +#if XSH_HINTS_NEED_STRUCT + +typedef struct { + XSH_HINTS_TYPE_STRUCT val; +#if XSH_WORKAROUND_REQUIRE_PROPAGATION + UV require_tag; +#endif +} xsh_hints_t; + +#if XSH_HINTS_VAL_STRUCT_REF +# define XSH_HINTS_VAL_GET(H) (&(H)->val) +#else +# define XSH_HINTS_VAL_GET(H) ((H)->val) +#endif + +#define XSH_HINTS_VAL_SET(H, V) XSH_HINTS_VAL_INIT(XSH_HINTS_VAL_GET(H), (V)) + +#ifdef XSH_HINTS_VAL_DEINIT +# define XSH_HINTS_FREE(H) \ + if (H) XSH_HINTS_VAL_DEINIT(XSH_HINTS_VAL_GET(H)); \ + PerlMemShared_free(H) +#else +# define XSH_HINTS_FREE(H) PerlMemShared_free(H) +#endif + +#else /* XSH_HINTS_NEED_STRUCT */ + +typedef XSH_HINTS_TYPE_COMPACT xsh_hints_t; + +#define XSH_HINTS_VAL_GET(H) XSH_HINTS_VAL_UNPACK(H) +#define XSH_HINTS_VAL_SET(H, V) STMT_START { XSH_HINTS_TYPE_VAL tmp; XSH_HINTS_VAL_INIT(tmp, (V)); (H) = XSH_HINTS_VAL_PACK(xsh_hints_t *, tmp); } STMT_END + +#undef XSH_HINTS_FREE + +#endif /* !XSH_HINTS_NEED_STRUCT */ + +/* ... Thread safety ....................................................... */ + +#if XSH_HINTS_NEED_CLONE + +#ifdef XSH_HINTS_FREE +# define PTABLE_NAME ptable_hints +# define PTABLE_VAL_FREE(V) XSH_HINTS_FREE((xsh_hints_t *) (V)) +#else +# define PTABLE_USE_DEFAULT 1 +#endif + +#define PTABLE_NEED_WALK 1 +#define PTABLE_NEED_DELETE 0 + +#include "ptable.h" + +#if PTABLE_WAS_DEFAULT +# define ptable_hints_store(T, K, V) ptable_default_store(aPTBL_ (T), (K), (V)) +# define ptable_hints_free(T) ptable_default_free(aPTBL_ (T)) +#else +# define ptable_hints_store(T, K, V) ptable_hints_store(aPTBL_ (T), (K), (V)) +# define ptable_hints_free(T) ptable_hints_free(aPTBL_ (T)) +#endif + +#define XSH_THREADS_HINTS_CONTEXT 1 + +typedef struct { + ptable *tbl; /* It really is a ptable_hints */ + tTHX owner; +} xsh_hints_cxt_t; + +static xsh_hints_cxt_t *xsh_hints_get_cxt(pTHX); + +static void xsh_hints_local_setup(pTHX_ xsh_hints_cxt_t *cxt) { + cxt->tbl = ptable_new(4); + cxt->owner = aTHX; +} + +static void xsh_hints_local_teardown(pTHX_ xsh_hints_cxt_t *cxt) { + ptable_hints_free(cxt->tbl); + cxt->owner = NULL; +} + +typedef struct { + ptable *tbl; /* It really is a ptable_hints */ + CLONE_PARAMS *params; +} xsh_ptable_clone_ud; + +static void xsh_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) { + xsh_ptable_clone_ud *ud = ud_; + xsh_hints_t *h1 = ent->val; + xsh_hints_t *h2; + +#if XSH_HINTS_NEED_STRUCT + h2 = PerlMemShared_malloc(sizeof *h2); +# if XSH_WORKAROUND_REQUIRE_PROPAGATION + h2->require_tag = PTR2UV(xsh_dup_inc(INT2PTR(SV *, h1->require_tag), ud->params)); +# endif +#endif /* XSH_HINTS_NEED_STRUCT */ + +#ifdef XSH_HINTS_VAL_CLONE + XSH_HINTS_VAL_CLONE(XSH_HINTS_VAL_GET(h2), XSH_HINTS_VAL_GET(h1)); +#endif /* defined(XSH_HINTS_VAL_CLONE) */ + + ptable_hints_store(ud->tbl, ent->key, h2); +} + +static void xsh_hints_clone(pTHX_ const xsh_hints_cxt_t *old_cxt, xsh_hints_cxt_t *new_cxt, CLONE_PARAMS *params) { + xsh_ptable_clone_ud ud; + + new_cxt->tbl = ptable_new(4); + new_cxt->owner = aTHX; + + ud.tbl = new_cxt->tbl; + ud.params = params; + + ptable_walk(old_cxt->tbl, xsh_ptable_clone, &ud); +} + +#endif /* XSH_HINTS_NEED_CLONE */ + +/* ... tag hints ........................................................... */ + +static SV *xsh_hints_tag(pTHX_ XSH_HINTS_TYPE_VAL val) { +#define xsh_hints_tag(V) xsh_hints_tag(aTHX_ (V)) + xsh_hints_t *h; + + if (val == XSH_HINTS_VAL_NONE) + return newSVuv(0); + +#if XSH_HINTS_NEED_STRUCT + h = PerlMemShared_malloc(sizeof *h); +# if XSH_WORKAROUND_REQUIRE_PROPAGATION + h->require_tag = xsh_require_tag(); +# endif +#endif /* XSH_HINTS_NEED_STRUCT */ + + XSH_HINTS_VAL_SET(h, val); + +#if XSH_HINTS_NEED_CLONE + /* We only need for the key to be an unique tag for looking up the value later + * Allocated memory provides convenient unique identifiers, so that's why we + * use the hint as the key itself. */ + { + xsh_hints_cxt_t *cxt = xsh_hints_get_cxt(aTHX); + XSH_ASSERT(cxt->tbl); + ptable_hints_store(cxt->tbl, h, h); + } +#endif /* !XSH_HINTS_NEED_CLONE */ + + return newSVuv(PTR2UV(h)); +} + +/* ... detag hints ......................................................... */ + +#define xsh_hints_2uv(H) \ + ((H) \ + ? (SvIOK(H) \ + ? SvUVX(H) \ + : (SvPOK(H) \ + ? sv_2uv(SvLEN(H) ? (H) : sv_mortalcopy(H)) \ + : 0 \ + ) \ + ) \ + : 0) + +static XSH_HINTS_TYPE_VAL xsh_hints_detag(pTHX_ SV *hint) { +#define xsh_hints_detag(H) xsh_hints_detag(aTHX_ (H)) + xsh_hints_t *h; + UV hint_uv; + + hint_uv = xsh_hints_2uv(hint); + h = INT2PTR(xsh_hints_t *, hint_uv); + if (!h) + return XSH_HINTS_VAL_NONE; + +#if XSH_HINTS_NEED_CLONE + { + xsh_hints_cxt_t *cxt = xsh_hints_get_cxt(aTHX); + XSH_ASSERT(cxt->tbl); + h = ptable_fetch(cxt->tbl, h); + } +#endif /* XSH_HINTS_NEED_CLONE */ + +#if XSH_WORKAROUND_REQUIRE_PROPAGATION + if (xsh_require_tag() != h->require_tag) + return XSH_HINTS_VAL_NONE; +#endif + + return XSH_HINTS_VAL_GET(h); +} + +/* ... fetch hints ......................................................... */ + +#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 cop_hints_fetch_pvn + +static U32 xsh_hints_key_hash = 0; +# define xsh_hints_global_setup(my_perl) \ + PERL_HASH(xsh_hints_key_hash, XSH_HINTS_KEY, XSH_HINTS_KEY_LEN) + +#else /* defined(cop_hints_fetch_pvn) */ + +# define xsh_hints_global_setup(my_perl) + +#endif /* !defined(cop_hints_fetch_pvn) */ + +#define xsh_hints_global_teardown(my_perl) + +static SV *xsh_hints_fetch(pTHX) { +#define xsh_hints_fetch() xsh_hints_fetch(aTHX) +#if XSH_HINTS_ONLY_COMPILE_TIME + if (IN_PERL_RUNTIME) + return NULL; +#endif + +#ifdef cop_hints_fetch_pvn + return cop_hints_fetch_pvn(PL_curcop, XSH_HINTS_KEY, XSH_HINTS_KEY_LEN, + xsh_hints_key_hash, 0); +#else + { + SV **val = hv_fetch(GvHV(PL_hintgv), XSH_HINTS_KEY, XSH_HINTS_KEY_LEN, 0); + return val ? *val : NULL; + } +#endif +} + +#endif /* XSH_HINTS_H */ diff --git a/xsh/ops.h b/xsh/ops.h new file mode 100644 index 0000000..2e3c06c --- /dev/null +++ b/xsh/ops.h @@ -0,0 +1,83 @@ +#ifndef XSH_OPS_H +#define XSH_OPS_H 1 + +#include "caps.h" /* XSH_HAS_PERL() */ +#include "util.h" /* NOOP */ + +#ifdef XSH_THREADS_H +# error threads.h must be loaded at the very end +#endif + +#ifndef XSH_THREADS_GLOBAL_SETUP +# define XSH_THREADS_GLOBAL_SETUP 1 +#endif + +#ifndef XSH_THREADS_GLOBAL_TEARDOWN +# define XSH_THREADS_GLOBAL_TEARDOWN 1 +#endif + +#ifndef OpSIBLING +# ifdef OP_SIBLING +# define OpSIBLING(O) OP_SIBLING(O) +# else +# define OpSIBLING(O) ((O)->op_sibling) +# endif +#endif + +#ifndef OpMAYBESIB_set +# define OpMAYBESIB_set(O, S, P) ((O)->op_sibling = (S)) +#endif + +#ifndef OP_NAME +# define OP_NAME(O) (PL_op_name[(O)->op_type]) +#endif + +#ifndef OP_CLASS +# define OP_CLASS(O) (PL_opargs[(O)->op_type] & OA_CLASS_MASK) +#endif + +#if defined(OP_CHECK_MUTEX_LOCK) && defined(OP_CHECK_MUTEX_UNLOCK) +# define XSH_CHECK_LOCK OP_CHECK_MUTEX_LOCK +# define XSH_CHECK_UNLOCK OP_CHECK_MUTEX_UNLOCK +#elif XSH_HAS_PERL(5, 9, 3) +# define XSH_CHECK_LOCK OP_REFCNT_LOCK +# define XSH_CHECK_UNLOCK OP_REFCNT_UNLOCK +#else +/* Before perl 5.9.3, da_ck_*() calls are already protected by the XSH_LOADED + * mutex, which falls back to the OP_REFCNT mutex. Make sure we don't lock it + * twice. */ +# define XSH_CHECK_LOCK NOOP +# define XSH_CHECK_UNLOCK NOOP +#endif + +typedef OP *(*xsh_check_t)(pTHX_ OP *); + +#ifdef wrap_op_checker + +# define xsh_ck_replace(T, NC, OCP) wrap_op_checker((T), (NC), (OCP)) + +#else + +static void xsh_ck_replace(pTHX_ OPCODE type, xsh_check_t new_ck, xsh_check_t *old_ck_p) { +#define xsh_ck_replace(T, NC, OCP) xsh_ck_replace(aTHX_ (T), (NC), (OCP)) + XSH_CHECK_LOCK; + if (!*old_ck_p) { + *old_ck_p = PL_check[type]; + PL_check[type] = new_ck; + } + XSH_CHECK_UNLOCK; +} + +#endif + +static void xsh_ck_restore(pTHX_ OPCODE type, xsh_check_t *old_ck_p) { +#define xsh_ck_restore(T, OCP) xsh_ck_restore(aTHX_ (T), (OCP)) + XSH_CHECK_LOCK; + if (*old_ck_p) { + PL_check[type] = *old_ck_p; + *old_ck_p = 0; + } + XSH_CHECK_UNLOCK; +} + +#endif /* XSH_OPS_H */ diff --git a/xsh/peep.h b/xsh/peep.h new file mode 100644 index 0000000..1bcd934 --- /dev/null +++ b/xsh/peep.h @@ -0,0 +1,190 @@ +#ifndef XSH_PEEP_H +#define XSH_PEEP_H 1 + +#include "caps.h" /* XSH_HAS_PERL(), XSH_THREADSAFE */ +#include "util.h" /* XSH_ASSERT(), NOOP */ + +#ifdef XSH_THREADS_H +# error threads.h must be loaded at the very end +#endif + +#ifndef XSH_HAS_RPEEP +# define XSH_HAS_RPEEP XSH_HAS_PERL(5, 13, 5) +#endif + +#define PTABLE_USE_DEFAULT 1 +#define PTABLE_NEED_DELETE 0 + +#include "ptable.h" + +#define ptable_seen_store(T, K, V) ptable_default_store(aPTBL_ (T), (K), (V)) +#define ptable_seen_clear(T) ptable_default_clear(aPTBL_ (T)) +#define ptable_seen_free(T) ptable_default_free(aPTBL_ (T)) + +#define XSH_THREADS_PEEP_CONTEXT 1 + +typedef struct { +#if XSH_HAS_RPEEP + peep_t old_rpeep; +#else + peep_t old_peep; +#endif + ptable *seen; +} xsh_peep_cxt_t; + +static xsh_peep_cxt_t *xsh_peep_get_cxt(pTHX); + +static void xsh_peep_rec(pTHX_ OP *o, ptable *seen); + +#if XSH_HAS_RPEEP + +static void xsh_rpeep(pTHX_ OP *o) { + ptable *seen; + xsh_peep_cxt_t *cxt = xsh_peep_get_cxt(aTHX); + + cxt->old_rpeep(aTHX_ o); + + seen = cxt->seen; + XSH_ASSERT(seen); + + ptable_seen_clear(seen); + + xsh_peep_rec(aTHX_ o, seen); + + ptable_seen_clear(seen); + + return; +} + +#define xsh_peep_maybe_recurse(O, S) NOOP + +#else /* XSH_HAS_RPEEP */ + +static void xsh_peep(pTHX_ OP *o) { + ptable *seen; + xsh_peep_cxt_t *cxt = xsh_peep_get_cxt(aTHX); + + cxt->old_peep(aTHX_ o); /* Will call the rpeep */ + + seen = cxt->seen; + XSH_ASSERT(seen); + + ptable_seen_clear(seen); + + xsh_peep_rec(aTHX_ o, seen); + + ptable_seen_clear(seen); + + return; +} + +static void xsh_peep_maybe_recurse(pTHX_ OP *o, ptable *seen) { +#define xsh_peep_maybe_recurse(O, S) xsh_peep_maybe_recurse(aTHX_ (O), (S)) + switch (o->op_type) { + case OP_MAPWHILE: + case OP_GREPWHILE: + case OP_AND: + case OP_OR: + case OP_ANDASSIGN: + case OP_ORASSIGN: + case OP_COND_EXPR: + case OP_RANGE: +#if XSH_HAS_PERL(5, 10, 0) + case OP_ONCE: + case OP_DOR: + case OP_DORASSIGN: +#endif + xsh_peep_rec(aTHX_ cLOGOPo->op_other, seen); + break; + case OP_ENTERLOOP: + case OP_ENTERITER: + xsh_peep_rec(aTHX_ cLOOPo->op_redoop, seen); + xsh_peep_rec(aTHX_ cLOOPo->op_nextop, seen); + xsh_peep_rec(aTHX_ cLOOPo->op_lastop, seen); + break; +#if XSH_HAS_PERL(5, 9, 5) + case OP_SUBST: + xsh_peep_rec(aTHX_ cPMOPo->op_pmstashstartu.op_pmreplstart, seen); + break; +#else + case OP_QR: + case OP_MATCH: + case OP_SUBST: + xsh_peep_rec(aTHX_ cPMOPo->op_pmreplstart, seen); + break; +#endif + } + + return; +} + +#endif /* !XSH_HAS_RPEEP */ + +static int xsh_peep_seen(pTHX_ OP *o, ptable *seen) { +#define xsh_peep_seen(O, S) xsh_peep_seen(aTHX_ (O), (S)) +#if XSH_HAS_RPEEP + switch (o->op_type) { + case OP_NEXTSTATE: + case OP_DBSTATE: + case OP_UNSTACK: + case OP_STUB: + break; + default: + return 0; + } +#endif /* XSH_HAS_RPEEP */ + + if (ptable_fetch(seen, o)) + return 1; + + ptable_seen_store(seen, o, o); + + return 0; +} + +static void xsh_peep_local_setup(pTHX_ xsh_peep_cxt_t *cxt) { +#if XSH_HAS_RPEEP + if (PL_rpeepp != xsh_rpeep) { + cxt->old_rpeep = PL_rpeepp; + PL_rpeepp = xsh_rpeep; + } else { + cxt->old_rpeep = 0; + } +#else + if (PL_peepp != xsh_peep) { + cxt->old_peep = PL_peepp; + PL_peepp = xsh_peep; + } else { + cxt->old_peep = 0; + } +#endif + + cxt->seen = ptable_new(32); +} + +static void xsh_peep_local_teardown(pTHX_ xsh_peep_cxt_t *cxt) { + ptable_seen_free(cxt->seen); + cxt->seen = NULL; + +#if XSH_HAS_RPEEP + if (cxt->old_rpeep) { + PL_rpeepp = cxt->old_rpeep; + cxt->old_rpeep = 0; + } +#else + if (cxt->old_peep) { + PL_peepp = cxt->old_peep; + cxt->old_peep = 0; + } +#endif + + return; +} + +static void xsh_peep_clone(pTHX_ const xsh_peep_cxt_t *old_cxt, xsh_peep_cxt_t *new_cxt) { + new_cxt->seen = ptable_new(32); + + return; +} + +#endif /* XSH_PEEP_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 */