--- /dev/null
+#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 */
--- /dev/null
+#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 */
--- /dev/null
+#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 */
--- /dev/null
+#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 */
--- /dev/null
+#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 */
--- /dev/null
+/* 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
+
+/* --- <ptable> 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
--- /dev/null
+#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 */
--- /dev/null
+#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<T>(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 */
projects / perl / modules / VPIT-XSHelpers.git / commitdiff