*/
/*
-* Contributed by Arthur Bergman arthur@contiller.se
-*
-* "Hand any two wizards a piece of rope and they would instinctively pull in
-* opposite directions."
-* --Sourcery
-*
-*/
+ *
+ * "Hand any two wizards a piece of rope and they would instinctively pull in
+ * opposite directions."
+ * --Sourcery
+ *
+ * Contributed by Arthur Bergman arthur@contiller.se
+ * pulled in the (an)other direction by Nick Ing-Simmons nick@ing-simmons.net
+ */
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
-PerlInterpreter *PL_sharedsv_space; /* The shared sv space */
-perl_mutex PL_sharedsv_space_mutex; /* Mutex protecting the shared sv space */
+#define SHAREDSvPTR(a) ((a)->sv)
+
+/*
+ * The shared things need an intepreter to live in ...
+ */
+PerlInterpreter *PL_sharedsv_space; /* The shared sv space */
+/* To access shared space we fake aTHX in this scope and thread's context */
+#define SHARED_CONTEXT PERL_SET_CONTEXT((aTHX = PL_sharedsv_space))
+
+/* So we need a way to switch back to the caller's context... */
+/* So we declare _another_ copy of the aTHX variable ... */
+#define dTHXc PerlInterpreter *caller_perl = aTHX
+/* and use it to switch back */
+#define CALLER_CONTEXT PERL_SET_CONTEXT((aTHX = caller_perl))
+
+/*
+ * Only one thread at a time is allowed to mess with shared space.
+ */
+perl_mutex PL_sharedsv_space_mutex; /* Mutex protecting the shared sv space */
+
+#define SHARED_LOCK MUTEX_LOCK(&PL_sharedsv_space_mutex)
+#define SHARED_UNLOCK MUTEX_UNLOCK(&PL_sharedsv_space_mutex)
+
+/* A common idiom is to acquire access and switch in ... */
+#define SHARED_EDIT STMT_START { \
+ SHARED_LOCK; \
+ SHARED_CONTEXT; \
+ } STMT_END
+
+/* then switch out and release access. */
+#define SHARED_RELEASE STMT_START { \
+ CALLER_CONTEXT; \
+ SHARED_UNLOCK; \
+ } STMT_END
+
+
+/*
+
+ Shared SV
+
+ Shared SV is a structure for keeping the backend storage
+ of shared svs.
+
+ Shared-ness really only needs the SV * - the rest is for locks.
+ (Which suggests further space optimization ... )
+
+*/
typedef struct {
- SV *sv; /* The actual SV */
+ SV *sv; /* The actual SV - in shared space */
perl_mutex mutex; /* Our mutex */
perl_cond cond; /* Our condition variable */
perl_cond user_cond; /* For user-level conditions */
IV locks; /* Number of locks held */
PerlInterpreter *owner; /* Who owns the lock? */
- U16 index; /* Update index */
} shared_sv;
-#define SHAREDSvGET(a) (a->sv)
-#define SHAREDSvLOCK(a) Perl_sharedsv_lock(aTHX_ a)
-#define SHAREDSvUNLOCK(a) Perl_sharedsv_unlock(aTHX_ a)
-
-#define SHAREDSvEDIT(a) STMT_START { \
- MUTEX_LOCK(&PL_sharedsv_space_mutex); \
- SHAREDSvLOCK((a)); \
- PERL_SET_CONTEXT(PL_sharedsv_space); \
- } STMT_END
-
-#define SHAREDSvRELEASE(a) STMT_START { \
- PERL_SET_CONTEXT((a)->owner); \
- SHAREDSvUNLOCK((a)); \
- MUTEX_UNLOCK(&PL_sharedsv_space_mutex); \
- } STMT_END
-
-extern void Perl_sharedsv_init(pTHX);
-extern shared_sv* Perl_sharedsv_new(pTHX);
-extern shared_sv* Perl_sharedsv_find(pTHX_ SV* sv);
-extern void Perl_sharedsv_lock(pTHX_ shared_sv* ssv);
-extern void Perl_sharedsv_unlock(pTHX_ shared_sv* ssv);
-extern void Perl_sharedsv_unlock_scope(pTHX_ shared_sv* ssv);
-extern void Perl_sharedsv_thrcnt_inc(pTHX_ shared_sv* ssv);
-extern void Perl_sharedsv_thrcnt_dec(pTHX_ shared_sv* ssv);
+/* The SV in shared-space has a back-pointer to the shared_sv
+ struct associated with it PERL_MAGIC_ext.
-/*
- Shared SV
+ The vtable used has just one entry - when the SV goes away
+ we free the memory for the above.
- Shared SV is a structure for keeping the backend storage
- of shared svs.
+ */
-*/
+int
+sharedsv_shared_mg_free(pTHX_ SV *sv, MAGIC *mg)
+{
+ shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ if (shared) {
+ PerlMemShared_free(shared);
+ mg->mg_ptr = NULL;
+ }
+ return 0;
+}
+
+
+MGVTBL sharedsv_shared_vtbl = {
+ 0, /* get */
+ 0, /* set */
+ 0, /* len */
+ 0, /* clear */
+ sharedsv_shared_mg_free, /* free */
+ 0, /* copy */
+ 0, /* dup */
+};
+
+/* Access to shared things is heavily based on MAGIC - in mg.h/mg.c/sv.c sense */
+
+/* In any thread that has access to a shared thing there is a "proxy"
+ for it in its own space which has 'MAGIC' associated which accesses
+ the shared thing.
+ */
+
+MGVTBL sharedsv_scalar_vtbl; /* scalars have this vtable */
+MGVTBL sharedsv_array_vtbl; /* hashes and arrays have this - like 'tie' */
+MGVTBL sharedsv_elem_vtbl; /* elements of hashes and arrays have this
+ _AS WELL AS_ the scalar magic */
+
+/* The sharedsv_elem_vtbl associates the element with the array/hash and
+ the sharedsv_scalar_vtbl associates it with the value
+ */
+
+=for apidoc sharedsv_find
+
+Given a private side SV tries to find if a given SV has a shared backend,
+by looking for the magic.
+
+=cut
+
+shared_sv *
+Perl_sharedsv_find(pTHX_ SV *sv)
+{
+ MAGIC *mg;
+ switch(SvTYPE(sv)) {
+ case SVt_PVAV:
+ case SVt_PVHV:
+ if ((mg = mg_find(sv, PERL_MAGIC_tied))
+ && mg->mg_virtual == &sharedsv_array_vtbl) {
+ return (shared_sv *) mg->mg_ptr;
+ }
+ break;
+ default:
+ if ((mg = mg_find(sv, PERL_MAGIC_shared_scalar))
+ && mg->mg_virtual == &sharedsv_scalar_vtbl) {
+ return (shared_sv *) mg->mg_ptr;
+ }
+ }
+ return NULL;
+}
/*
+ * Almost all the pain is in this routine.
+ *
+ */
- =head1 Shared SV Functions
+shared_sv *
+Perl_sharedsv_associate(pTHX_ SV **psv, SV *ssv, shared_sv *data)
+{
+ /* First try and get global data structure */
+ dTHXc;
+ MAGIC *mg;
+ SV *sv;
+ if (aTHX == PL_sharedsv_space) {
+ croak("panic:Cannot associate from within shared space");
+ }
+ SHARED_LOCK;
- =for apidoc sharedsv_init
+ /* Try shared SV as 1st choice */
+ if (!data && ssv) {
+ if (mg = mg_find(ssv, PERL_MAGIC_ext)) {
+ data = (shared_sv *) mg->mg_ptr;
+ }
+ }
+ /* Next try private SV */
+ if (!data && psv && *psv) {
+ data = Perl_sharedsv_find(aTHX_ *psv);
+ }
+ /* If neither of those then create a new one */
+ if (!data) {
+ data = PerlMemShared_malloc(sizeof(shared_sv));
+ Zero(data,1,shared_sv);
+ MUTEX_INIT(&data->mutex);
+ COND_INIT(&data->cond);
+ COND_INIT(&data->user_cond);
+ data->owner = 0;
+ data->locks = 0;
+ }
-Saves a space for keeping SVs wider than an interpreter,
-currently only stores a pointer to the first interpreter.
+ if (!ssv)
+ ssv = SHAREDSvPTR(data);
+
+ /* If we know type allocate shared side SV */
+ if (psv && *psv && !ssv) {
+ SHARED_CONTEXT;
+ ssv = newSV(0);
+ sv_upgrade(ssv, SvTYPE(*psv));
+ /* Tag shared side SV with data pointer */
+ sv_magicext(ssv, ssv, PERL_MAGIC_ext, &sharedsv_shared_vtbl,
+ (char *)data, 0);
+ CALLER_CONTEXT;
+ }
- =cut
+ if (!SHAREDSvPTR(data))
+ SHAREDSvPTR(data) = ssv;
-*/
+ /* Now if requested allocate private SV */
+ if (psv && !*psv && ssv) {
+ sv = newSV(0);
+ sv_upgrade(sv, SvTYPE(SHAREDSvPTR(data)));
+ *psv = sv;
+ }
+
+ /* Finally if private SV exists check and add magic */
+ if (psv && *psv) {
+ SV *sv = *psv;
+ MAGIC *mg;
+ switch(SvTYPE(sv)) {
+ case SVt_PVAV:
+ case SVt_PVHV:
+ if (!(mg = mg_find(sv, PERL_MAGIC_tied))
+ || mg->mg_virtual != &sharedsv_array_vtbl) {
+ if (mg)
+ sv_unmagic(sv, PERL_MAGIC_tied);
+ mg = sv_magicext(sv, sv, PERL_MAGIC_tied, &sharedsv_array_vtbl,
+ (char *) data, 0);
+ mg->mg_flags |= (MGf_COPY|MGf_DUP);
+ }
+ break;
+
+ default:
+ if (!(mg = mg_find(sv, PERL_MAGIC_shared_scalar)) ||
+ mg->mg_virtual != &sharedsv_scalar_vtbl) {
+ if (mg)
+ sv_unmagic(sv, PERL_MAGIC_shared_scalar);
+ mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar,
+ &sharedsv_scalar_vtbl, (char *)data, 0);
+ mg->mg_flags |= (MGf_COPY|MGf_DUP);
+ }
+ break;
+ }
+ }
+ SHARED_UNLOCK;
+ return data;
+}
void
-Perl_sharedsv_init(pTHX)
+Perl_sharedsv_free(pTHX_ shared_sv *shared)
{
- PerlInterpreter* old_context = PERL_GET_CONTEXT;
- PL_sharedsv_space = perl_alloc();
- perl_construct(PL_sharedsv_space);
- PERL_SET_CONTEXT(old_context);
- MUTEX_INIT(&PL_sharedsv_space_mutex);
+ if (shared) {
+ dTHXc;
+ SHARED_EDIT;
+ SvREFCNT_dec(SHAREDSvPTR(shared));
+ SHARED_RELEASE;
+ }
}
-/*
- =for apidoc sharedsv_new
+void
+Perl_sharedsv_share(pTHX_ SV *sv)
+{
+ switch(SvTYPE(sv)) {
+ case SVt_PVGV:
+ Perl_croak(aTHX_ "Cannot share globs yet");
+ break;
+
+ case SVt_PVCV:
+ Perl_croak(aTHX_ "Cannot share subs yet");
+ break;
+
+ default:
+ Perl_sharedsv_associate(aTHX_ &sv, 0, 0);
+ }
+}
-Allocates a new shared sv struct, you must yourself create the SV/AV/HV.
- =cut
-*/
+/* MAGIC (in mg.h sense) hooks */
-shared_sv *
-Perl_sharedsv_new(pTHX)
+int
+sharedsv_scalar_mg_get(pTHX_ SV *sv, MAGIC *mg)
{
- shared_sv* ssv;
- New(2555,ssv,1,shared_sv);
- MUTEX_INIT(&ssv->mutex);
- COND_INIT(&ssv->cond);
- COND_INIT(&ssv->user_cond);
- ssv->owner = 0;
- ssv->locks = 0;
- ssv->index = 0;
- return ssv;
+ shared_sv *shared = (shared_sv *) mg->mg_ptr;
+
+ SHARED_LOCK;
+ SvOK_off(sv);
+ if (SHAREDSvPTR(shared)) {
+ if (SvROK(SHAREDSvPTR(shared))) {
+ SV *rv = newRV(Nullsv);
+ Perl_sharedsv_associate(aTHX_ &SvRV(rv), SvRV(SHAREDSvPTR(shared)), NULL);
+ sv_setsv(sv, rv);
+ }
+ else {
+ sv_setsv(sv, SHAREDSvPTR(shared));
+ }
+ }
+ SHARED_UNLOCK;
+ return 0;
+}
+
+int
+sharedsv_scalar_mg_set(pTHX_ SV *sv, MAGIC *mg)
+{
+ dTHXc;
+ shared_sv *shared = Perl_sharedsv_associate(aTHX_ &sv, Nullsv,
+ (shared_sv *) mg->mg_ptr);
+ bool allowed = TRUE;
+
+ SHARED_EDIT;
+ if (SvROK(sv)) {
+ shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(sv));
+ if (target) {
+ SV *tmp = newRV(SHAREDSvPTR(target));
+ sv_setsv(SHAREDSvPTR(shared), tmp);
+ SvREFCNT_dec(tmp);
+ }
+ else {
+ allowed = FALSE;
+ }
+ }
+ else {
+ sv_setsv(SHAREDSvPTR(shared), sv);
+ }
+ SHARED_RELEASE;
+
+ if (!allowed) {
+ Perl_croak(aTHX_ "Invalid value for shared scalar");
+ }
+ return 0;
}
+int
+sharedsv_scalar_mg_free(pTHX_ SV *sv, MAGIC *mg)
+{
+ Perl_sharedsv_free(aTHX_ (shared_sv *) mg->mg_ptr);
+ return 0;
+}
/*
- =for apidoc sharedsv_find
+ * Called during cloning of new threads
+ */
+int
+sharedsv_scalar_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
+{
+ shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ if (shared) {
+ SvREFCNT_inc(SHAREDSvPTR(shared));
+ }
+ return 0;
+}
-Tries to find if a given SV has a shared backend, either by
-looking at magic, or by checking if it is tied again threads::shared.
+MGVTBL sharedsv_scalar_vtbl = {
+ sharedsv_scalar_mg_get, /* get */
+ sharedsv_scalar_mg_set, /* set */
+ 0, /* len */
+ 0, /* clear */
+ sharedsv_scalar_mg_free, /* free */
+ 0, /* copy */
+ sharedsv_scalar_mg_dup /* dup */
+};
- =cut
-*/
+/* Now the arrays/hashes stuff */
-shared_sv *
-Perl_sharedsv_find(pTHX_ SV* sv)
+int
+sharedsv_elem_mg_FETCH(pTHX_ SV *sv, MAGIC *mg)
{
- /* does all it can to find a shared_sv struct, returns NULL otherwise */
- shared_sv* ssv = NULL;
- switch (SvTYPE(sv)) {
- case SVt_PVMG:
- case SVt_PVAV:
- case SVt_PVHV: {
- MAGIC* mg = mg_find(sv, PERL_MAGIC_ext);
- if(mg) {
- if(strcmp(mg->mg_ptr,"threads::shared"))
- break;
- ssv = INT2PTR(shared_sv *, SvIV(mg->mg_obj));
- break;
- }
-
- mg = mg_find(sv,PERL_MAGIC_tied);
- if(mg) {
- SV* obj = SvTIED_obj(sv,mg);
- if(sv_derived_from(obj, "threads::shared"))
- ssv = INT2PTR(shared_sv *, SvIV(SvRV(obj)));
- break;
- }
+ dTHXc;
+ shared_sv *shared = Perl_sharedsv_find(aTHX_ mg->mg_obj);
+ shared_sv *target = Perl_sharedsv_find(aTHX_ sv);
+ SV** svp;
+
+ SHARED_EDIT;
+ if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ svp = av_fetch((AV*) SHAREDSvPTR(shared), mg->mg_len, 0);
+ }
+ else {
+ svp = hv_fetch((HV*) SHAREDSvPTR(shared), mg->mg_ptr, mg->mg_len, 0);
+ }
+
+ if (svp) {
+ if (SHAREDSvPTR(target) != *svp) {
+ if (SHAREDSvPTR(target)) {
+ SvREFCNT_dec(SHAREDSvPTR(target));
+ }
+ SHAREDSvPTR(target) = SvREFCNT_inc(*svp);
+ }
+ }
+ else {
+ if (SHAREDSvPTR(target)) {
+ SvREFCNT_dec(SHAREDSvPTR(target));
}
+ SHAREDSvPTR(target) = Nullsv;
}
- return ssv;
+ SHARED_RELEASE;
+ return 0;
}
-/*
- =for apidoc sharedsv_lock
+int
+sharedsv_elem_mg_STORE(pTHX_ SV *sv, MAGIC *mg)
+{
+ dTHXc;
+ shared_sv *shared = Perl_sharedsv_find(aTHX_ mg->mg_obj);
+ shared_sv *target = Perl_sharedsv_associate(aTHX_ &sv, Nullsv, 0);
+ /* Theory - SV itself is magically shared - and we have ordered the
+ magic such that by the time we get here it has been stored
+ to its shared counterpart
+ */
+ SHARED_EDIT;
+ if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ av_store((AV*) SHAREDSvPTR(shared), mg->mg_len, SHAREDSvPTR(target));
+ }
+ else {
+ hv_store((HV*) SHAREDSvPTR(shared), mg->mg_ptr, mg->mg_len,
+ SHAREDSvPTR(target), 0);
+ }
+ SHARED_RELEASE;
+ return 0;
+}
-Recursive locks on a sharedsv.
-Locks are dynamically scoped at the level of the first lock.
- =cut
-*/
-void
-Perl_sharedsv_lock(pTHX_ shared_sv* ssv)
+int
+sharedsv_elem_mg_DELETE(pTHX_ SV *sv, MAGIC *mg)
{
- if(!ssv)
- return;
- MUTEX_LOCK(&ssv->mutex);
- if(ssv->owner && ssv->owner == my_perl) {
- ssv->locks++;
- MUTEX_UNLOCK(&ssv->mutex);
- return;
+ dTHXc;
+ shared_sv *shared = Perl_sharedsv_find(aTHX_ mg->mg_obj);
+ SV* ssv;
+ SHARED_EDIT;
+ if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ ssv = av_delete((AV*) SHAREDSvPTR(shared), mg->mg_len, 0);
}
- while(ssv->owner)
- COND_WAIT(&ssv->cond,&ssv->mutex);
- ssv->locks++;
- ssv->owner = my_perl;
- if(ssv->locks == 1)
- SAVEDESTRUCTOR_X(Perl_sharedsv_unlock_scope,ssv);
- MUTEX_UNLOCK(&ssv->mutex);
+ else {
+ ssv = hv_delete((HV*) SHAREDSvPTR(shared), mg->mg_ptr, mg->mg_len, 0);
+ }
+ SHARED_RELEASE;
+ /* It is no longer in the array - so remove that magic */
+ sv_unmagic(sv, PERL_MAGIC_tiedelem);
+ Perl_sharedsv_associate(aTHX_ &sv, ssv, 0);
+ return 0;
+}
+
+
+int
+sharedsv_elem_mg_free(pTHX_ SV *sv, MAGIC *mg)
+{
+ Perl_sharedsv_free(aTHX_ Perl_sharedsv_find(aTHX_ mg->mg_obj));
+ return 0;
+}
+
+int
+sharedsv_elem_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
+{
+ shared_sv *shared = Perl_sharedsv_find(aTHX_ mg->mg_obj);
+ SvREFCNT_inc(SHAREDSvPTR(shared));
+ mg->mg_flags |= MGf_DUP;
+ return 0;
+}
+
+MGVTBL sharedsv_elem_vtbl = {
+ sharedsv_elem_mg_FETCH, /* get */
+ sharedsv_elem_mg_STORE, /* set */
+ 0, /* len */
+ sharedsv_elem_mg_DELETE, /* clear */
+ sharedsv_elem_mg_free, /* free */
+ 0, /* copy */
+ sharedsv_elem_mg_dup /* dup */
+};
+
+U32
+sharedsv_array_mg_FETCHSIZE(pTHX_ SV *sv, MAGIC *mg)
+{
+ dTHXc;
+ shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ U32 val;
+ SHARED_EDIT;
+ if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ val = av_len((AV*) SHAREDSvPTR(shared));
+ }
+ else {
+ /* not actually defined by tie API but ... */
+ val = HvKEYS((HV*) SHAREDSvPTR(shared));
+ }
+ SHARED_RELEASE;
+ return val;
+}
+
+int
+sharedsv_array_mg_CLEAR(pTHX_ SV *sv, MAGIC *mg)
+{
+ dTHXc;
+ shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ SHARED_EDIT;
+ if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ av_clear((AV*) SHAREDSvPTR(shared));
+ }
+ else {
+ hv_clear((HV*) SHAREDSvPTR(shared));
+ }
+ SHARED_RELEASE;
+ return 0;
+}
+
+int
+sharedsv_array_mg_free(pTHX_ SV *sv, MAGIC *mg)
+{
+ Perl_sharedsv_free(aTHX_ (shared_sv *) mg->mg_ptr);
+ return 0;
}
/*
- =for apidoc sharedsv_unlock
+ * This is called when perl is about to access an element of
+ * the array -
+ */
+int
+sharedsv_array_mg_copy(pTHX_ SV *sv, MAGIC* mg,
+ SV *nsv, const char *name, int namlen)
+{
+ shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ MAGIC *nmg = sv_magicext(nsv,mg->mg_obj,
+ toLOWER(mg->mg_type),&sharedsv_elem_vtbl,
+ name, namlen);
+ nmg->mg_flags |= MGf_DUP;
+#if 0
+ /* Maybe do this to associate shared value immediately ? */
+ sharedsv_elem_FIND(aTHX_ nsv, nmg);
+#endif
+ return 1;
+}
+
+int
+sharedsv_array_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
+{
+ shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ SvREFCNT_inc(SHAREDSvPTR(shared));
+ mg->mg_flags |= MGf_DUP;
+ return 0;
+}
+
+MGVTBL sharedsv_array_vtbl = {
+ 0, /* get */
+ 0, /* set */
+ sharedsv_array_mg_FETCHSIZE, /* len */
+ sharedsv_array_mg_CLEAR, /* clear */
+ sharedsv_array_mg_free, /* free */
+ sharedsv_array_mg_copy, /* copy */
+ sharedsv_array_mg_dup /* dup */
+};
+
+=for apidoc sharedsv_unlock
Recursively unlocks a shared sv.
- =cut
-*/
+=cut
void
Perl_sharedsv_unlock(pTHX_ shared_sv* ssv)
{
MUTEX_LOCK(&ssv->mutex);
- if(ssv->owner != my_perl) {
- Perl_croak(aTHX_ "panic: Perl_sharedsv_unlock unlocking mutex that we don't own");
- MUTEX_UNLOCK(&ssv->mutex);
- return;
+ if (ssv->owner != aTHX) {
+ Perl_croak(aTHX_ "panic: Perl_sharedsv_unlock unlocking mutex that we don't own");
+ MUTEX_UNLOCK(&ssv->mutex);
+ return;
}
- if(--ssv->locks == 0) {
- ssv->owner = NULL;
+ if (--ssv->locks == 0) {
+ ssv->owner = NULL;
COND_SIGNAL(&ssv->cond);
}
MUTEX_UNLOCK(&ssv->mutex);
Perl_sharedsv_unlock_scope(pTHX_ shared_sv* ssv)
{
MUTEX_LOCK(&ssv->mutex);
- if(ssv->owner != my_perl) {
- MUTEX_UNLOCK(&ssv->mutex);
- return;
+ if (ssv->owner != aTHX) {
+ MUTEX_UNLOCK(&ssv->mutex);
+ return;
}
ssv->locks = 0;
ssv->owner = NULL;
MUTEX_UNLOCK(&ssv->mutex);
}
-/*
- =for apidoc sharedsv_thrcnt_inc
-
-Increments the threadcount of a sharedsv.
- =cut
-*/
-void
-Perl_sharedsv_thrcnt_inc(pTHX_ shared_sv* ssv)
-{
- SHAREDSvLOCK(ssv);
- SvREFCNT_inc(ssv->sv);
- SHAREDSvUNLOCK(ssv);
-}
-
-/*
- =for apidoc sharedsv_thrcnt_dec
+=for apidoc sharedsv_lock
-Decrements the threadcount of a shared sv. When a threads frontend is freed
-this function should be called.
+Recursive locks on a sharedsv.
+Locks are dynamically scoped at the level of the first lock.
- =cut
-*/
+=cut
void
-Perl_sharedsv_thrcnt_dec(pTHX_ shared_sv* ssv)
+Perl_sharedsv_lock(pTHX_ shared_sv* ssv)
{
- SV* sv;
- SHAREDSvLOCK(ssv);
- sv = SHAREDSvGET(ssv);
- if (SvREFCNT(sv) == 1) {
- switch (SvTYPE(sv)) {
- case SVt_RV:
- if (SvROK(sv))
- Perl_sharedsv_thrcnt_dec(aTHX_ INT2PTR(shared_sv *, SvIV(SvRV(sv))));
- break;
- case SVt_PVAV: {
- SV **src_ary = AvARRAY((AV *)sv);
- SSize_t items = AvFILLp((AV *)sv) + 1;
-
- while (items-- > 0) {
- if(SvTYPE(*src_ary))
- Perl_sharedsv_thrcnt_dec(aTHX_ INT2PTR(shared_sv *, SvIV(*src_ary)));
- src_ary++;
- }
- break;
- }
- case SVt_PVHV: {
- HE *entry;
- (void)hv_iterinit((HV *)sv);
- while ((entry = hv_iternext((HV *)sv)))
- Perl_sharedsv_thrcnt_dec(
- aTHX_ INT2PTR(shared_sv *, SvIV(hv_iterval((HV *)sv, entry)))
- );
- break;
- }
- }
+ if (!ssv)
+ return;
+ MUTEX_LOCK(&ssv->mutex);
+ if (ssv->owner && ssv->owner == aTHX) {
+ ssv->locks++;
+ MUTEX_UNLOCK(&ssv->mutex);
+ return;
}
- Perl_sv_free(PL_sharedsv_space,SHAREDSvGET(ssv));
- SHAREDSvUNLOCK(ssv);
+ while (ssv->owner)
+ COND_WAIT(&ssv->cond,&ssv->mutex);
+ ssv->locks++;
+ ssv->owner = aTHX;
+ if (ssv->locks == 1)
+ SAVEDESTRUCTOR_X(Perl_sharedsv_unlock_scope,ssv);
+ MUTEX_UNLOCK(&ssv->mutex);
}
-
-MGVTBL svtable;
-
-#define shared_sv_attach_sv(sv,shared) Perl_shared_sv_attach_sv(aTHX_ sv,shared)
-
-SV* Perl_shared_sv_attach_sv (pTHX_ SV* sv, shared_sv* shared) {
- HV* shared_hv = get_hv("threads::shared::shared", FALSE);
- SV* id = newSViv(PTR2IV(shared));
- STRLEN length = sv_len(id);
- SV* tiedobject;
- SV** tiedobject_ = hv_fetch(shared_hv, SvPV(id,length), length, 0);
- if(tiedobject_) {
- tiedobject = (*tiedobject_);
- if(sv) {
- SvROK_on(sv);
- SvRV(sv) = SvRV(tiedobject);
- } else {
- sv = newRV(SvRV(tiedobject));
- }
- } else {
- switch(SvTYPE(SHAREDSvGET(shared))) {
- case SVt_PVAV: {
- SV* weakref;
- SV* obj_ref = newSViv(0);
- SV* obj = newSVrv(obj_ref,"threads::shared::av");
- AV* hv = newAV();
- sv_setiv(obj,PTR2IV(shared));
- weakref = newRV((SV*)hv);
- sv = newRV_noinc((SV*)hv);
- sv_rvweaken(weakref);
- sv_magic((SV*) hv, obj_ref, PERL_MAGIC_tied, Nullch, 0);
- hv_store(shared_hv, SvPV(id,length), length, weakref, 0);
- Perl_sharedsv_thrcnt_inc(aTHX_ shared);
- }
- break;
- case SVt_PVHV: {
- SV* weakref;
- SV* obj_ref = newSViv(0);
- SV* obj = newSVrv(obj_ref,"threads::shared::hv");
- HV* hv = newHV();
- sv_setiv(obj,PTR2IV(shared));
- weakref = newRV((SV*)hv);
- sv = newRV_noinc((SV*)hv);
- sv_rvweaken(weakref);
- sv_magic((SV*) hv, obj_ref, PERL_MAGIC_tied, Nullch, 0);
- hv_store(shared_hv, SvPV(id,length), length, weakref, 0);
- Perl_sharedsv_thrcnt_inc(aTHX_ shared);
- }
- break;
- default: {
- MAGIC* shared_magic;
- SV* value = newSVsv(SHAREDSvGET(shared));
- SV* obj = newSViv(PTR2IV(shared));
- sv_magic(value, 0, PERL_MAGIC_ext, "threads::shared", 16);
- shared_magic = mg_find(value, PERL_MAGIC_ext);
- shared_magic->mg_virtual = &svtable;
- shared_magic->mg_obj = newSViv(PTR2IV(shared));
- shared_magic->mg_flags |= MGf_REFCOUNTED;
- shared_magic->mg_private = 0;
- SvMAGICAL_on(value);
- sv = newRV_noinc(value);
- value = newRV(value);
- sv_rvweaken(value);
- hv_store(shared_hv, SvPV(id,length),length, value, 0);
- Perl_sharedsv_thrcnt_inc(aTHX_ shared);
- }
-
- }
- }
- return sv;
+void
+Perl_sharedsv_locksv(pTHX_ SV *sv)
+{
+ Perl_sharedsv_lock(aTHX_ Perl_sharedsv_find(aTHX_ sv));
}
+=head1 Shared SV Functions
-int shared_sv_fetch_mg (pTHX_ SV* sv, MAGIC *mg) {
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(mg->mg_obj));
- SHAREDSvLOCK(shared);
- if(mg->mg_private != shared->index) {
- if(SvROK(SHAREDSvGET(shared))) {
- shared_sv* target = INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(shared))));
- shared_sv_attach_sv(sv, target);
- } else {
- sv_setsv(sv, SHAREDSvGET(shared));
- }
- mg->mg_private = shared->index;
- }
- SHAREDSvUNLOCK(shared);
+=for apidoc sharedsv_init
- return 0;
-}
+Saves a space for keeping SVs wider than an interpreter,
+currently only stores a pointer to the first interpreter.
-int shared_sv_store_mg (pTHX_ SV* sv, MAGIC *mg) {
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(mg->mg_obj));
- SHAREDSvLOCK(shared);
- if(SvROK(SHAREDSvGET(shared)))
- Perl_sharedsv_thrcnt_dec(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(shared)))));
- if(SvROK(sv)) {
- shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(sv));
- if(!target) {
- sv_setsv(sv,SHAREDSvGET(shared));
- SHAREDSvUNLOCK(shared);
- Perl_croak(aTHX_ "You cannot assign a non shared reference to a shared scalar");
- }
- SHAREDSvEDIT(shared);
- Perl_sv_free(PL_sharedsv_space,SHAREDSvGET(shared));
- SHAREDSvGET(shared) = newRV_noinc(newSViv(PTR2IV(target)));
- } else {
- SHAREDSvEDIT(shared);
- sv_setsv(SHAREDSvGET(shared), sv);
- }
- shared->index++;
- mg->mg_private = shared->index;
- SHAREDSvRELEASE(shared);
- if(SvROK(SHAREDSvGET(shared)))
- Perl_sharedsv_thrcnt_inc(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(shared)))));
- SHAREDSvUNLOCK(shared);
- return 0;
+=cut
+
+void
+Perl_sharedsv_init(pTHX)
+{
+ dTHXc;
+ /* This pair leaves us in shared context ... */
+ PL_sharedsv_space = perl_alloc();
+ perl_construct(PL_sharedsv_space);
+ CALLER_CONTEXT;
+ MUTEX_INIT(&PL_sharedsv_space_mutex);
+ PL_lockhook = &Perl_sharedsv_locksv;
+ PL_sharehook = &Perl_sharedsv_share;
}
-int
-shared_sv_destroy_mg (pTHX_ SV* sv, MAGIC *mg)
+/* Accessor to convert threads::shared::tie objects back shared_sv * */
+shared_sv *
+SV_to_sharedsv(pTHX_ SV *sv)
{
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(mg->mg_obj));
- if (shared) {
- HV* shared_hv = get_hv("threads::shared::shared", FALSE);
- SV* id = newSViv(PTR2IV(shared));
- STRLEN length = sv_len(id);
- hv_delete(shared_hv, SvPV(id,length), length,0);
- Perl_sharedsv_thrcnt_dec(aTHX_ shared);
- }
- return 0;
+ shared_sv *shared = 0;
+ if (SvROK(sv))
+ {
+ shared = INT2PTR(shared_sv *, SvIV(SvRV(sv)));
+ }
+ return shared;
}
-MGVTBL svtable = {MEMBER_TO_FPTR(shared_sv_fetch_mg),
- MEMBER_TO_FPTR(shared_sv_store_mg),
- 0,
- 0,
- MEMBER_TO_FPTR(shared_sv_destroy_mg)
-};
+MODULE = threads::shared PACKAGE = threads::shared::tie
-MODULE = threads::shared PACKAGE = threads::shared
+PROTOTYPES: DISABLE
+void
+PUSH(shared_sv *shared, ...)
+CODE:
+ dTHXc;
+ int i;
+ SHARED_LOCK;
+ for(i = 1; i < items; i++) {
+ SV* tmp = newSVsv(ST(i));
+ shared_sv *target = Perl_sharedsv_associate(aTHX_ &tmp, Nullsv, 0);
+ SHARED_CONTEXT;
+ av_push((AV*) SHAREDSvPTR(shared), SHAREDSvPTR(target));
+ CALLER_CONTEXT;
+ SvREFCNT_dec(tmp);
+ }
+ SHARED_UNLOCK;
-PROTOTYPES: ENABLE
+void
+UNSHIFT(shared_sv *shared, ...)
+CODE:
+ dTHXc;
+ int i;
+ SHARED_LOCK;
+ SHARED_CONTEXT;
+ av_unshift((AV*)SHAREDSvPTR(shared), items - 1);
+ CALLER_CONTEXT;
+ for(i = 1; i < items; i++) {
+ SV* tmp = newSVsv(ST(i));
+ shared_sv *target = Perl_sharedsv_associate(aTHX_ &tmp, Nullsv, 0);
+ SHARED_CONTEXT;
+ av_store((AV*) SHAREDSvPTR(shared), i - 1, SHAREDSvPTR(target));
+ CALLER_CONTEXT;
+ SvREFCNT_dec(tmp);
+ }
+ SHARED_UNLOCK;
+void
+POP(shared_sv *shared)
+CODE:
+ dTHXc;
+ SV* sv;
+ SHARED_LOCK;
+ SHARED_CONTEXT;
+ sv = av_pop((AV*)SHAREDSvPTR(shared));
+ CALLER_CONTEXT;
+ ST(0) = Nullsv;
+ Perl_sharedsv_associate(aTHX_ &ST(0), sv, 0);
+ SHARED_UNLOCK;
+ XSRETURN(1);
-SV*
-ptr(ref)
- SV* ref
- CODE:
- RETVAL = newSViv(SvIV(SvRV(ref)));
- OUTPUT:
- RETVAL
+void
+SHIFT(shared_sv *shared)
+CODE:
+ dTHXc;
+ SV* sv;
+ SHARED_LOCK;
+ SHARED_CONTEXT;
+ sv = av_shift((AV*)SHAREDSvPTR(shared));
+ CALLER_CONTEXT;
+ ST(0) = Nullsv;
+ Perl_sharedsv_associate(aTHX_ &ST(0), sv, 0);
+ SHARED_UNLOCK;
+ XSRETURN(1);
+void
+EXTEND(shared_sv *shared, IV count)
+CODE:
+ dTHXc;
+ SHARED_EDIT;
+ av_extend((AV*)SHAREDSvPTR(shared), count);
+ SHARED_RELEASE;
-SV*
-_thrcnt(ref)
- SV* ref
- CODE:
- shared_sv* shared;
- if(SvROK(ref))
- ref = SvRV(ref);
- shared = Perl_sharedsv_find(aTHX, ref);
- if(!shared)
- croak("thrcnt can only be used on shared values");
- SHAREDSvLOCK(shared);
- RETVAL = newSViv(SvREFCNT(SHAREDSvGET(shared)));
- SHAREDSvUNLOCK(shared);
- OUTPUT:
- RETVAL
+void
+EXISTS(shared_sv *shared, SV *index)
+CODE:
+ dTHXc;
+ bool exists;
+ SHARED_EDIT;
+ if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ exists = av_exists((AV*) SHAREDSvPTR(shared), SvIV(index));
+ }
+ else {
+ exists = hv_exists_ent((HV*) SHAREDSvPTR(shared), index, 0);
+ }
+ SHARED_RELEASE;
+ ST(0) = (exists) ? &PL_sv_yes : &PL_sv_no;
+ XSRETURN(1);
+void
+STORESIZE(shared_sv *shared,IV count)
+CODE:
+ dTHXc;
+ SHARED_EDIT;
+ av_fill((AV*) SHAREDSvPTR(shared), count);
+ SHARED_RELEASE;
void
-thrcnt_inc(ref,perl)
- SV* ref
- SV* perl
- CODE:
- shared_sv* shared;
- PerlInterpreter* origperl = INT2PTR(PerlInterpreter*, SvIV(perl));
- PerlInterpreter* oldperl = PERL_GET_CONTEXT;
- if(SvROK(ref))
- ref = SvRV(ref);
- shared = Perl_sharedsv_find(aTHX, ref);
- if(!shared)
- croak("thrcnt can only be used on shared values");
- PERL_SET_CONTEXT(origperl);
- Perl_sharedsv_thrcnt_inc(aTHX_ shared);
- PERL_SET_CONTEXT(oldperl);
+FIRSTKEY(shared_sv *shared)
+CODE:
+ dTHXc;
+ char* key = NULL;
+ I32 len = 0;
+ HE* entry;
+ SHARED_LOCK;
+ SHARED_CONTEXT;
+ hv_iterinit((HV*) SHAREDSvPTR(shared));
+ entry = hv_iternext((HV*) SHAREDSvPTR(shared));
+ if (entry) {
+ key = hv_iterkey(entry,&len);
+ CALLER_CONTEXT;
+ ST(0) = sv_2mortal(newSVpv(key, len));
+ } else {
+ CALLER_CONTEXT;
+ ST(0) = &PL_sv_undef;
+ }
+ SHARED_UNLOCK;
+ XSRETURN(1);
void
-_thrcnt_dec(ref)
- SV* ref
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(ref));
- if(!shared)
- croak("thrcnt can only be used on shared values");
- Perl_sharedsv_thrcnt_dec(aTHX_ shared);
+NEXTKEY(shared_sv *shared, SV *oldkey)
+CODE:
+ dTHXc;
+ char* key = NULL;
+ I32 len = 0;
+ HE* entry;
+ SHARED_LOCK;
+ SHARED_CONTEXT;
+ entry = hv_iternext((HV*) SHAREDSvPTR(shared));
+ if(entry) {
+ key = hv_iterkey(entry,&len);
+ CALLER_CONTEXT;
+ ST(0) = sv_2mortal(newSVpv(key, len));
+ } else {
+ CALLER_CONTEXT;
+ ST(0) = &PL_sv_undef;
+ }
+ SHARED_UNLOCK;
+ XSRETURN(1);
+
+MODULE = threads::shared PACKAGE = threads::shared
+
+PROTOTYPES: ENABLE
void
-unlock_enabled(ref)
- SV* ref
+lock_enabled(SV *ref)
PROTOTYPE: \[$@%]
CODE:
shared_sv* shared;
if(SvROK(ref))
ref = SvRV(ref);
shared = Perl_sharedsv_find(aTHX, ref);
- if(!shared)
- croak("unlock can only be used on shared values");
- SHAREDSvUNLOCK(shared);
-
-void
-lock_enabled(ref)
- SV* ref
- CODE:
- shared_sv* shared;
- if(SvROK(ref))
- ref = SvRV(ref);
- shared = Perl_sharedsv_find(aTHX, ref);
- if(!shared)
- croak("lock can only be used on shared values");
- SHAREDSvLOCK(shared);
-
+ if(!shared)
+ croak("lock can only be used on shared values");
+ Perl_sharedsv_lock(aTHX_ shared);
void
-cond_wait_enabled(ref)
- SV* ref
+cond_wait_enabled(SV *ref)
PROTOTYPE: \[$@%]
CODE:
shared_sv* shared;
shared = Perl_sharedsv_find(aTHX_ ref);
if(!shared)
croak("cond_wait can only be used on shared values");
- if(shared->owner != PERL_GET_CONTEXT)
+ if(shared->owner != aTHX)
croak("You need a lock before you can cond_wait");
MUTEX_LOCK(&shared->mutex);
shared->owner = NULL;
locks = shared->locks = 0;
COND_WAIT(&shared->user_cond, &shared->mutex);
- shared->owner = PERL_GET_CONTEXT;
+ shared->owner = aTHX;
shared->locks = locks;
MUTEX_UNLOCK(&shared->mutex);
-void cond_signal_enabled(ref)
- SV* ref
+void
+cond_signal_enabled(SV *ref)
PROTOTYPE: \[$@%]
CODE:
shared_sv* shared;
croak("cond_signal can only be used on shared values");
COND_SIGNAL(&shared->user_cond);
-
-void cond_broadcast_enabled(ref)
- SV* ref
+void
+cond_broadcast_enabled(SV *ref)
PROTOTYPE: \[$@%]
CODE:
shared_sv* shared;
croak("cond_broadcast can only be used on shared values");
COND_BROADCAST(&shared->user_cond);
-MODULE = threads::shared PACKAGE = threads::shared::sv
-
-SV*
-new(class, value)
- SV* class
- SV* value
- CODE:
- shared_sv* shared = Perl_sharedsv_new(aTHX);
- MAGIC* shared_magic;
- SV* obj = newSViv(PTR2IV(shared));
- SHAREDSvEDIT(shared);
- SHAREDSvGET(shared) = newSVsv(value);
- SHAREDSvRELEASE(shared);
- sv_magic(value, 0, PERL_MAGIC_ext, "threads::shared", 16);
- shared_magic = mg_find(value, PERL_MAGIC_ext);
- shared_magic->mg_virtual = &svtable;
- shared_magic->mg_obj = newSViv(PTR2IV(shared));
- shared_magic->mg_flags |= MGf_REFCOUNTED;
- shared_magic->mg_private = 0;
- SvMAGICAL_on(value);
- RETVAL = obj;
- OUTPUT:
- RETVAL
-
-
-MODULE = threads::shared PACKAGE = threads::shared::av
-
-SV*
-new(class, value)
- SV* class
- SV* value
- CODE:
- shared_sv* shared = Perl_sharedsv_new(aTHX);
- SV* obj = newSViv(PTR2IV(shared));
- SHAREDSvEDIT(shared);
- SHAREDSvGET(shared) = (SV*) newAV();
- SHAREDSvRELEASE(shared);
- RETVAL = obj;
- OUTPUT:
- RETVAL
-
-void
-STORE(self, index, value)
- SV* self
- SV* index
- SV* value
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SV* aentry;
- SV** aentry_;
- if(SvROK(value)) {
- shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(value));
- if(!target) {
- Perl_croak(aTHX_ "You cannot assign a non shared reference to a shared array");
- }
- value = newRV_noinc(newSViv(PTR2IV(target)));
- }
- SHAREDSvLOCK(shared);
- aentry_ = av_fetch((AV*) SHAREDSvGET(shared), SvIV(index), 0);
- if(aentry_ && SvIV((*aentry_))) {
- aentry = (*aentry_);
- slot = INT2PTR(shared_sv*, SvIV(aentry));
- if(SvROK(SHAREDSvGET(slot)))
- Perl_sharedsv_thrcnt_dec(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot)))));
- SHAREDSvEDIT(slot);
- sv_setsv(SHAREDSvGET(slot), value);
- SHAREDSvRELEASE(slot);
- } else {
- slot = Perl_sharedsv_new(aTHX);
- SHAREDSvEDIT(shared);
- SHAREDSvGET(slot) = newSVsv(value);
- aentry = newSViv(PTR2IV(slot));
- av_store((AV*) SHAREDSvGET(shared), SvIV(index), aentry);
- SHAREDSvRELEASE(shared);
- }
- if(SvROK(SHAREDSvGET(slot)))
- Perl_sharedsv_thrcnt_inc(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot)))));
-
- SHAREDSvUNLOCK(shared);
-
-SV*
-FETCH(self, index)
- SV* self
- SV* index
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SV* aentry;
- SV** aentry_;
- SV* retval;
- SHAREDSvLOCK(shared);
- aentry_ = av_fetch((AV*) SHAREDSvGET(shared), SvIV(index),0);
- if(aentry_) {
- aentry = (*aentry_);
- if(SvTYPE(aentry) == SVt_NULL) {
- retval = &PL_sv_undef;
- } else {
- slot = INT2PTR(shared_sv*, SvIV(aentry));
- if(SvROK(SHAREDSvGET(slot))) {
- shared_sv* target = INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot))));
- retval = Perl_shared_sv_attach_sv(aTHX_ NULL,target);
- } else {
- retval = newSVsv(SHAREDSvGET(slot));
- }
- }
- } else {
- retval = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- RETVAL = retval;
- OUTPUT:
- RETVAL
-
-void
-PUSH(self, ...)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- int i;
- SHAREDSvLOCK(shared);
- for(i = 1; i < items; i++) {
- shared_sv* slot = Perl_sharedsv_new(aTHX);
- SV* tmp = ST(i);
- if(SvROK(tmp)) {
- shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(tmp));
- if(!target) {
- Perl_croak(aTHX_ "You cannot assign a non shared reference to a shared array");
- }
- tmp = newRV_noinc(newSViv(PTR2IV(target)));
- }
- SHAREDSvEDIT(slot);
- SHAREDSvGET(slot) = newSVsv(tmp);
- av_push((AV*) SHAREDSvGET(shared), newSViv(PTR2IV(slot)));
- SHAREDSvRELEASE(slot);
- if(SvROK(SHAREDSvGET(slot)))
- Perl_sharedsv_thrcnt_inc(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot)))));
- }
- SHAREDSvUNLOCK(shared);
-
-void
-UNSHIFT(self, ...)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- int i;
- SHAREDSvLOCK(shared);
- SHAREDSvEDIT(shared);
- av_unshift((AV*)SHAREDSvGET(shared), items - 1);
- SHAREDSvRELEASE(shared);
- for(i = 1; i < items; i++) {
- shared_sv* slot = Perl_sharedsv_new(aTHX);
- SV* tmp = ST(i);
- if(SvROK(tmp)) {
- shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(tmp));
- if(!target) {
- Perl_croak(aTHX_ "You cannot assign a non shared reference to a shared array");
- }
- tmp = newRV_noinc(newSViv(PTR2IV(target)));
- }
- SHAREDSvEDIT(slot);
- SHAREDSvGET(slot) = newSVsv(tmp);
- av_store((AV*) SHAREDSvGET(shared), i - 1, newSViv(PTR2IV(slot)));
- SHAREDSvRELEASE(slot);
- if(SvROK(SHAREDSvGET(slot)))
- Perl_sharedsv_thrcnt_inc(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot)))));
- }
- SHAREDSvUNLOCK(shared);
-
-SV*
-POP(self)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SV* retval;
- SHAREDSvLOCK(shared);
- SHAREDSvEDIT(shared);
- retval = av_pop((AV*)SHAREDSvGET(shared));
- SHAREDSvRELEASE(shared);
- if(retval && SvIV(retval)) {
- slot = INT2PTR(shared_sv*, SvIV(retval));
- if(SvROK(SHAREDSvGET(slot))) {
- shared_sv* target = INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot))));
- retval = Perl_shared_sv_attach_sv(aTHX_ NULL,target);
- } else {
- retval = newSVsv(SHAREDSvGET(slot));
- }
- Perl_sharedsv_thrcnt_dec(aTHX_ slot);
- } else {
- retval = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- RETVAL = retval;
- OUTPUT:
- RETVAL
-
-
-SV*
-SHIFT(self)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SV* retval;
- SHAREDSvLOCK(shared);
- SHAREDSvEDIT(shared);
- retval = av_shift((AV*)SHAREDSvGET(shared));
- SHAREDSvRELEASE(shared);
- if(retval && SvIV(retval)) {
- slot = INT2PTR(shared_sv*, SvIV(retval));
- if(SvROK(SHAREDSvGET(slot))) {
- shared_sv* target = INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot))));
- retval = Perl_shared_sv_attach_sv(aTHX_ NULL,target);
- } else {
- retval = newSVsv(SHAREDSvGET(slot));
- }
- Perl_sharedsv_thrcnt_dec(aTHX_ slot);
- } else {
- retval = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- RETVAL = retval;
- OUTPUT:
- RETVAL
-
-void
-CLEAR(self)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SV** svp;
- I32 i;
- SHAREDSvLOCK(shared);
- svp = AvARRAY((AV*)SHAREDSvGET(shared));
- i = AvFILLp((AV*)SHAREDSvGET(shared));
- while ( i >= 0) {
- if(SvIV(svp[i])) {
- Perl_sharedsv_thrcnt_dec(aTHX_ INT2PTR(shared_sv*, SvIV(svp[i])));
- }
- i--;
- }
- SHAREDSvEDIT(shared);
- av_clear((AV*)SHAREDSvGET(shared));
- SHAREDSvRELEASE(shared);
- SHAREDSvUNLOCK(shared);
-
-void
-EXTEND(self, count)
- SV* self
- SV* count
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- SHAREDSvEDIT(shared);
- av_extend((AV*)SHAREDSvGET(shared), (I32) SvIV(count));
- SHAREDSvRELEASE(shared);
-
-
-
-
-SV*
-EXISTS(self, index)
- SV* self
- SV* index
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- I32 exists;
- SHAREDSvLOCK(shared);
- exists = av_exists((AV*) SHAREDSvGET(shared), (I32) SvIV(index));
- if(exists) {
- RETVAL = &PL_sv_yes;
- } else {
- RETVAL = &PL_sv_no;
- }
- SHAREDSvUNLOCK(shared);
-
-void
-STORESIZE(self,count)
- SV* self
- SV* count
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- SHAREDSvEDIT(shared);
- av_fill((AV*) SHAREDSvGET(shared), (I32) SvIV(count));
- SHAREDSvRELEASE(shared);
-
-SV*
-FETCHSIZE(self)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- SHAREDSvLOCK(shared);
- RETVAL = newSViv(av_len((AV*) SHAREDSvGET(shared)) + 1);
- SHAREDSvUNLOCK(shared);
- OUTPUT:
- RETVAL
-
-SV*
-DELETE(self,index)
- SV* self
- SV* index
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SHAREDSvLOCK(shared);
- if(av_exists((AV*) SHAREDSvGET(shared), (I32) SvIV(index))) {
- SV* tmp;
- SHAREDSvEDIT(shared);
- tmp = av_delete((AV*)SHAREDSvGET(shared), (I32) SvIV(index),0);
- SHAREDSvRELEASE(shared);
- if(SvIV(tmp)) {
- slot = INT2PTR(shared_sv*, SvIV(tmp));
- if(SvROK(SHAREDSvGET(slot))) {
- shared_sv* target = INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot))));
- RETVAL = Perl_shared_sv_attach_sv(aTHX_ NULL,target);
- } else {
- RETVAL = newSVsv(SHAREDSvGET(slot));
- }
- Perl_sharedsv_thrcnt_dec(aTHX_ slot);
- } else {
- RETVAL = &PL_sv_undef;
- }
- } else {
- RETVAL = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- OUTPUT:
- RETVAL
-
-AV*
-SPLICE(self, offset, length, ...)
- SV* self
- SV* offset
- SV* length
- CODE:
- croak("Splice is not implmented for shared arrays");
-
-MODULE = threads::shared PACKAGE = threads::shared::hv
-
-SV*
-new(class, value)
- SV* class
- SV* value
- CODE:
- shared_sv* shared = Perl_sharedsv_new(aTHX);
- SV* obj = newSViv(PTR2IV(shared));
- SHAREDSvEDIT(shared);
- SHAREDSvGET(shared) = (SV*) newHV();
- SHAREDSvRELEASE(shared);
- RETVAL = obj;
- OUTPUT:
- RETVAL
-
-void
-STORE(self, key, value)
- SV* self
- SV* key
- SV* value
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SV* hentry;
- SV** hentry_;
- STRLEN len;
- char* ckey = SvPV(key, len);
- SHAREDSvLOCK(shared);
- if(SvROK(value)) {
- shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(value));
- if(!target) {
- Perl_croak(aTHX_ "You cannot assign a non shared reference to a shared hash");
- }
- SHAREDSvEDIT(shared);
- value = newRV_noinc(newSViv(PTR2IV(target)));
- SHAREDSvRELEASE(shared);
- }
- hentry_ = hv_fetch((HV*) SHAREDSvGET(shared), ckey, len, 0);
- if(hentry_ && SvIV((*hentry_))) {
- hentry = (*hentry_);
- slot = INT2PTR(shared_sv*, SvIV(hentry));
- if(SvROK(SHAREDSvGET(slot)))
- Perl_sharedsv_thrcnt_dec(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot)))));
- SHAREDSvEDIT(slot);
- sv_setsv(SHAREDSvGET(slot), value);
- SHAREDSvRELEASE(slot);
- } else {
- slot = Perl_sharedsv_new(aTHX);
- SHAREDSvEDIT(shared);
- SHAREDSvGET(slot) = newSVsv(value);
- hentry = newSViv(PTR2IV(slot));
- hv_store((HV*) SHAREDSvGET(shared), ckey,len , hentry, 0);
- SHAREDSvRELEASE(shared);
- }
- if(SvROK(SHAREDSvGET(slot)))
- Perl_sharedsv_thrcnt_inc(aTHX_ INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot)))));
- SHAREDSvUNLOCK(shared);
-
-
-SV*
-FETCH(self, key)
- SV* self
- SV* key
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- SV* hentry;
- SV** hentry_;
- SV* retval;
- STRLEN len;
- char* ckey = SvPV(key, len);
- SHAREDSvLOCK(shared);
- hentry_ = hv_fetch((HV*) SHAREDSvGET(shared), ckey, len,0);
- if(hentry_) {
- hentry = (*hentry_);
- if(SvTYPE(hentry) == SVt_NULL) {
- retval = &PL_sv_undef;
- } else {
- slot = INT2PTR(shared_sv*, SvIV(hentry));
- if(SvROK(SHAREDSvGET(slot))) {
- shared_sv* target = INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot))));
- retval = Perl_shared_sv_attach_sv(aTHX_ NULL, target);
- } else {
- retval = newSVsv(SHAREDSvGET(slot));
- }
- }
- } else {
- retval = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- RETVAL = retval;
- OUTPUT:
- RETVAL
-
-void
-CLEAR(self)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- HE* entry;
- SHAREDSvLOCK(shared);
- Perl_hv_iterinit(PL_sharedsv_space, (HV*) SHAREDSvGET(shared));
- entry = Perl_hv_iternext(PL_sharedsv_space, (HV*) SHAREDSvGET(shared));
- while(entry) {
- slot = INT2PTR(shared_sv*, SvIV(Perl_hv_iterval(PL_sharedsv_space, (HV*) SHAREDSvGET(shared), entry)));
- Perl_sharedsv_thrcnt_dec(aTHX_ slot);
- entry = Perl_hv_iternext(PL_sharedsv_space,(HV*) SHAREDSvGET(shared));
- }
- SHAREDSvEDIT(shared);
- hv_clear((HV*) SHAREDSvGET(shared));
- SHAREDSvRELEASE(shared);
- SHAREDSvUNLOCK(shared);
-
-SV*
-FIRSTKEY(self)
- SV* self
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- char* key = NULL;
- I32 len;
- HE* entry;
- SHAREDSvLOCK(shared);
- Perl_hv_iterinit(PL_sharedsv_space, (HV*) SHAREDSvGET(shared));
- entry = Perl_hv_iternext(PL_sharedsv_space, (HV*) SHAREDSvGET(shared));
- if(entry) {
- key = Perl_hv_iterkey(PL_sharedsv_space, entry,&len);
- RETVAL = newSVpv(key, len);
- } else {
- RETVAL = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- OUTPUT:
- RETVAL
-
-
-SV*
-NEXTKEY(self, oldkey)
- SV* self
- SV* oldkey
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- char* key = NULL;
- I32 len;
- HE* entry;
- SHAREDSvLOCK(shared);
- entry = Perl_hv_iternext(PL_sharedsv_space, (HV*) SHAREDSvGET(shared));
- if(entry) {
- key = Perl_hv_iterkey(PL_sharedsv_space, entry,&len);
- RETVAL = newSVpv(key, len);
- } else {
- RETVAL = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- OUTPUT:
- RETVAL
-
-
-SV*
-EXISTS(self, key)
- SV* self
- SV* key
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- STRLEN len;
- char* ckey = SvPV(key, len);
- SHAREDSvLOCK(shared);
- if(hv_exists((HV*)SHAREDSvGET(shared), ckey, len)) {
- RETVAL = &PL_sv_yes;
- } else {
- RETVAL = &PL_sv_no;
- }
- SHAREDSvUNLOCK(shared);
- OUTPUT:
- RETVAL
-
-SV*
-DELETE(self, key)
- SV* self
- SV* key
- CODE:
- shared_sv* shared = INT2PTR(shared_sv*, SvIV(SvRV(self)));
- shared_sv* slot;
- STRLEN len;
- char* ckey = SvPV(key, len);
- SV* tmp;
- SHAREDSvLOCK(shared);
- SHAREDSvEDIT(shared);
- tmp = hv_delete((HV*) SHAREDSvGET(shared), ckey, len,0);
- SHAREDSvRELEASE(shared);
- if(tmp) {
- slot = INT2PTR(shared_sv*, SvIV(tmp));
- if(SvROK(SHAREDSvGET(slot))) {
- shared_sv* target = INT2PTR(shared_sv*, SvIV(SvRV(SHAREDSvGET(slot))));
- RETVAL = Perl_shared_sv_attach_sv(aTHX_ NULL, target);
- } else {
- RETVAL = newSVsv(SHAREDSvGET(slot));
- }
- Perl_sharedsv_thrcnt_dec(aTHX_ slot);
- } else {
- RETVAL = &PL_sv_undef;
- }
- SHAREDSvUNLOCK(shared);
- OUTPUT:
- RETVAL
-
BOOT:
{
Perl_sharedsv_init(aTHX);
projects / p5sagit/p5-mst-13.2.git / commitdiff