/* shared.xs
*
- * Copyright (c) 2001-2002, Larry Wall
+ * Copyright (c) 2001-2002, 2006 Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* pulled in the (an)other direction by Nick Ing-Simmons nick@ing-simmons.net
*/
+/*
+ * Shared variables are implemented by a scheme similar to tieing.
+ * Each thread has a proxy SV with attached magic -- "private SVs" --
+ * which all point to a single SV in a separate shared interpreter
+ * (PL_sharedsv_space) -- "shared SVs".
+ *
+ * The shared SV holds the variable's true values, and its state is
+ * copied between the shared and private SVs with the usual
+ * mg_get()/mg_set() arrangement.
+ *
+ * Aggregates (AVs and HVs) are implemented using tie magic, except that
+ * the vtable used is one defined in this file rather than the standard one.
+ * This means that where a tie function like is FETCH is normally invoked by
+ * the tie magic's mg_get() function, we completely bypass the calling of a
+ * perl-level function, and directly call C-level code to handle it. On
+ * the other hand. calls to functions like PUSH are done directly by code
+ * in av.c etc, which we can't bypass. So the best we can do is to provide
+ * XS versions of these functions. We also have to attach a tie object,
+ * blessed into the class threads::shared::tie, to keep the method-calling
+ * code happy.
+ *
+ * Access to aggregate elements is done the usual tied way by returning a
+ * proxy PVLV element with attached element magic.
+ *
+ * Pointers to the shared SV are squirrelled away in the mg->mg_ptr field
+ * of magic (with mg_len == 0), and in the IV2PTR(SvIV(sv)) field of tied
+ * object SVs. These pointers have to be hidden like this because they
+ * cross interpreter boundaries, and we don't want sv_clear() and friends
+ * following them.
+ *
+ * The three basic shared types look like the following:
+ *
+ * -----------------
+ *
+ * Shared scalar (my $s : shared):
+ *
+ * SV = PVMG(0x7ba238) at 0x7387a8
+ * FLAGS = (PADMY,GMG,SMG)
+ * MAGIC = 0x824d88
+ * MG_TYPE = PERL_MAGIC_shared_scalar(n)
+ * MG_PTR = 0x810358 <<<< pointer to the shared SV
+ *
+ * -----------------
+ *
+ * Shared aggregate (my @a : shared; my %h : shared):
+ *
+ * SV = PVAV(0x7175d0) at 0x738708
+ * FLAGS = (PADMY,RMG)
+ * MAGIC = 0x824e48
+ * MG_TYPE = PERL_MAGIC_tied(P)
+ * MG_OBJ = 0x7136e0 <<<< ref to the tied object
+ * SV = RV(0x7136f0) at 0x7136e0
+ * RV = 0x738640
+ * SV = PVMG(0x7ba238) at 0x738640 <<<< the tied object
+ * FLAGS = (OBJECT,IOK,pIOK)
+ * IV = 8455000 <<<< pointer to the shared AV
+ * STASH = 0x80abf0 "threads::shared::tie"
+ * MG_PTR = 0x810358 "" <<<< another pointer to the shared AV
+ * ARRAY = 0x0
+ *
+ * -----------------
+ *
+ * Aggregate element (my @a : shared; $a[0])
+ *
+ * SV = PVLV(0x77f628) at 0x713550
+ * FLAGS = (GMG,SMG,RMG,pIOK)
+ * MAGIC = 0x72bd58
+ * MG_TYPE = PERL_MAGIC_shared_scalar(n)
+ * MG_PTR = 0x8103c0 "" <<<< pointer to the shared element
+ * MAGIC = 0x72bd18
+ * MG_TYPE = PERL_MAGIC_tiedelem(p)
+ * MG_OBJ = 0x7136e0 <<<< ref to the tied object
+ * SV = RV(0x7136f0) at 0x7136e0
+ * RV = 0x738660
+ * SV = PVMG(0x7ba278) at 0x738660 <<<< the tied object
+ * FLAGS = (OBJECT,IOK,pIOK)
+ * IV = 8455064 <<<< pointer to the shared AV
+ * STASH = 0x80ac30 "threads::shared::tie"
+ * TYPE = t
+ *
+ * Note that PERL_MAGIC_tiedelem(p) magic doesn't have a pointer to a
+ * shared SV in mg_ptr; instead this is used to store the hash key,
+ * if any, like normal tied elements. Note also that element SVs may have
+ * pointers to both the shared aggregate and the shared element
+ *
+ *
+ * Userland locks:
+ *
+ * if a shared variable is used as a perl-level lock or condition
+ * variable, then PERL_MAGIC_ext magic is attached to the associated
+ * *shared* SV, whose mg_ptr field points to a malloced structure
+ * containing the necessary mutexes and condition variables.
+ *
+ * Nomenclature:
+ *
+ * In this file, any variable name prefixed with 's', eg ssv, stmp or sobj,
+ * usually represents a shared SV which correspondis to a private SV named
+ * without the prefix, eg sv, tmp or obj.
+ */
+
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#ifdef USE_ITHREADS
-#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))
+
+/* bug #24255: we include ENTER+SAVETMPS/FREETMPS+LEAVE with
+ * SHARED_CONTEXT/CALLER_CONTEXT macros, so that any mortals etc created
+ * while in the shared interpreter context don't languish */
+
+#define SHARED_CONTEXT \
+ STMT_START { \
+ PERL_SET_CONTEXT((aTHX = PL_sharedsv_space)); \
+ ENTER; \
+ SAVETMPS; \
+ } STMT_END
/* 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))
+#define CALLER_CONTEXT \
+ STMT_START { \
+ FREETMPS; \
+ LEAVE; \
+ PERL_SET_CONTEXT((aTHX = caller_perl)); \
+ } STMT_END
/*
* Only one thread at a time is allowed to mess with shared space.
recursive_lock_acquire(aTHX_ &PL_sharedsv_lock, __FILE__, __LINE__); \
} STMT_END
+/* the unlocking is done automatically at scope exit */
#define LEAVE_LOCK LEAVE
} 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 ... )
-
+/* user-level locks:
+ This structure is attached (using ext magic) to any shared SV that
+ is used by user-level locking or condition code
*/
typedef struct {
- SV *sv; /* The actual SV - in shared space */
- recursive_lock_t lock;
+ recursive_lock_t lock; /* for user-levl locks */
perl_cond user_cond; /* For user-level conditions */
-} shared_sv;
+} user_lock;
-/* The SV in shared-space has a back-pointer to the shared_sv
- struct associated with it PERL_MAGIC_ext.
+/* magic used for attaching user_lock structs to shared SVs
The vtable used has just one entry - when the SV goes away
we free the memory for the above.
-
*/
int
-sharedsv_shared_mg_free(pTHX_ SV *sv, MAGIC *mg)
+sharedsv_userlock_free(pTHX_ SV *sv, MAGIC *mg)
{
- shared_sv *shared = (shared_sv *) mg->mg_ptr;
- assert( aTHX == PL_sharedsv_space );
- if (shared) {
- recursive_lock_destroy(aTHX_ &shared->lock);
- COND_DESTROY(&shared->user_cond);
- PerlMemShared_free(shared);
+ user_lock *ul = (user_lock *) mg->mg_ptr;
+ assert(aTHX == PL_sharedsv_space);
+ if (ul) {
+ recursive_lock_destroy(aTHX_ &ul->lock);
+ COND_DESTROY(&ul->user_cond);
+ PerlMemShared_free(ul);
mg->mg_ptr = NULL;
}
return 0;
}
-MGVTBL sharedsv_shared_vtbl = {
+MGVTBL sharedsv_uesrlock_vtbl = {
0, /* get */
0, /* set */
0, /* len */
0, /* clear */
- sharedsv_shared_mg_free, /* free */
+ sharedsv_userlock_free, /* free */
0, /* copy */
0, /* dup */
+ 0 /* local */
};
/* Access to shared things is heavily based on MAGIC - in mg.h/mg.c/sv.c sense */
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
+ _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
*/
-/* Accessor to convert threads::shared::tie objects back shared_sv * */
-shared_sv *
-SV_to_sharedsv(pTHX_ SV *sv)
+/* get shared aggregate SV pointed to by threads::shared::tie magic object */
+
+STATIC SV *
+S_sharedsv_from_obj(pTHX_ SV *sv)
{
- shared_sv *shared = 0;
- if (SvROK(sv))
- {
- shared = INT2PTR(shared_sv *, SvIV(SvRV(sv)));
- }
- return shared;
+ return SvROK(sv) ? INT2PTR(SV *, SvIV(SvRV(sv))) : NULL;
}
+
+/* Return the user_lock structure (if any) associated with a shared SV.
+ * If create is true, create one if it doesn't exist */
+
+STATIC user_lock *
+S_get_userlock(pTHX_ SV* ssv, bool create)
+{
+ MAGIC *mg;
+ user_lock *ul = NULL;
+
+ assert(ssv);
+ /* XXX redsign the storage of user locks so we dont need a global
+ * lock to access them ???? DAPM */
+ ENTER_LOCK;
+ mg = mg_find(ssv, PERL_MAGIC_ext);
+ if (mg)
+ ul = (user_lock*)(mg->mg_ptr);
+ else if (create) {
+ dTHXc;
+ SHARED_CONTEXT;
+ ul = (user_lock *) PerlMemShared_malloc(sizeof(user_lock));
+ Zero(ul, 1, user_lock);
+ /* attach to shared SV using ext magic */
+ sv_magicext(ssv, NULL, PERL_MAGIC_ext, &sharedsv_uesrlock_vtbl,
+ (char *)ul, 0);
+ recursive_lock_init(aTHX_ &ul->lock);
+ COND_INIT(&ul->user_cond);
+ CALLER_CONTEXT;
+ }
+ LEAVE_LOCK;
+ return ul;
+}
+
+
=for apidoc sharedsv_find
Given a private side SV tries to find if the SV has a shared backend,
=cut
-shared_sv *
+SV *
Perl_sharedsv_find(pTHX_ SV *sv)
{
MAGIC *mg;
case SVt_PVHV:
if ((mg = mg_find(sv, PERL_MAGIC_tied))
&& mg->mg_virtual == &sharedsv_array_vtbl) {
- return (shared_sv *) mg->mg_ptr;
+ return (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 (SV *) mg->mg_ptr;
}
break;
}
}
/* Just for tidyness of API also handle tie objects */
if (SvROK(sv) && sv_derived_from(sv, "threads::shared::tie")) {
- return SV_to_sharedsv(aTHX_ sv);
+ return S_sharedsv_from_obj(aTHX_ sv);
}
return NULL;
}
-/*
- * Almost all the pain is in this routine.
- *
- */
-shared_sv *
-Perl_sharedsv_associate(pTHX_ SV **psv, SV *ssv, shared_sv *data)
+/* associate a private SV with a shared SV by pointing the appropriate
+ * magics at it. Assumes lock is held */
+
+void
+Perl_sharedsv_associate(pTHX_ SV *sv, SV *ssv)
{
dTHXc;
MAGIC *mg = 0;
- SV *sv = (psv) ? *psv : Nullsv;
- /* If we are asked for an private ops we need a thread */
+ /* If we are asked for any private ops we need a thread */
assert ( aTHX != PL_sharedsv_space );
/* To avoid need for recursive locks require caller to hold lock */
assert ( PL_sharedsv_lock.owner == aTHX );
- /* First try and get existing global data structure */
+ switch(SvTYPE(sv)) {
+ case SVt_PVAV:
+ case SVt_PVHV:
+ if (!(mg = mg_find(sv, PERL_MAGIC_tied))
+ || mg->mg_virtual != &sharedsv_array_vtbl
+ || (SV*) mg->mg_ptr != ssv)
+ {
+ SV *obj = newSV(0);
+ sv_setref_iv(obj, "threads::shared::tie",PTR2IV(ssv));
+ if (mg) {
+ sv_unmagic(sv, PERL_MAGIC_tied);
+ }
+ mg = sv_magicext(sv, obj, PERL_MAGIC_tied, &sharedsv_array_vtbl,
+ (char *) ssv, 0);
+ mg->mg_flags |= (MGf_COPY|MGf_DUP);
+ SvREFCNT_inc(ssv);
+ SvREFCNT_dec(obj);
+ if (SvOBJECT(ssv)) {
+ STRLEN len;
+ char* stash_ptr = SvPV((SV*) SvSTASH(ssv), len);
+ HV* stash = gv_stashpvn(stash_ptr, len, TRUE);
+ SvOBJECT_on(sv);
+ SvSTASH_set(sv, (HV*)SvREFCNT_inc(stash));
+ }
+ }
+ break;
- /* Try shared SV as 1st choice */
- if (!data && ssv && SvTYPE(ssv) >= SVt_PVMG) {
- if( (mg = mg_find(ssv, PERL_MAGIC_ext)) ){
- data = (shared_sv *) mg->mg_ptr;
+ default:
+ if ((SvTYPE(sv) < SVt_PVMG)
+ || !(mg = mg_find(sv, PERL_MAGIC_shared_scalar))
+ || mg->mg_virtual != &sharedsv_scalar_vtbl
+ || (SV*) mg->mg_ptr != ssv)
+ {
+ if (mg) {
+ sv_unmagic(sv, PERL_MAGIC_shared_scalar);
+ }
+ mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar,
+ &sharedsv_scalar_vtbl, (char *)ssv, 0);
+ mg->mg_flags |= (MGf_DUP|MGf_LOCAL);
+ SvREFCNT_inc(ssv);
+ if(SvOBJECT(ssv)) {
+ STRLEN len;
+ char* stash_ptr = SvPV((SV*) SvSTASH(ssv), len);
+ HV* stash = gv_stashpvn(stash_ptr, len, TRUE);
+ SvOBJECT_on(sv);
+ SvSTASH_set(sv, (HV*)SvREFCNT_inc(stash));
+ }
}
+ break;
}
+ assert ( Perl_sharedsv_find(aTHX_ sv) == ssv );
+}
- /* Next see if private SV is associated with something */
- if (!data && sv) {
- data = Perl_sharedsv_find(aTHX_ sv);
- }
- /* If neither of those then create a new one */
- if (!data) {
- SHARED_CONTEXT;
- if (!ssv) {
- ssv = newSV(0);
- SvREFCNT(ssv) = 0;
- }
- data = PerlMemShared_malloc(sizeof(shared_sv));
- Zero(data,1,shared_sv);
- SHAREDSvPTR(data) = ssv;
- /* Tag shared side SV with data pointer */
- sv_magicext(ssv, ssv, PERL_MAGIC_ext, &sharedsv_shared_vtbl,
- (char *)data, 0);
- recursive_lock_init(aTHX_ &data->lock);
- COND_INIT(&data->user_cond);
- CALLER_CONTEXT;
- }
+/* Given a private SV, create and return an associated shared SV.
+ * Assumes lock is held */
- if (!ssv)
- ssv = SHAREDSvPTR(data);
- if (!SHAREDSvPTR(data))
- SHAREDSvPTR(data) = ssv;
+STATIC SV *
+S_sharedsv_new_shared(pTHX_ SV *sv)
+{
+ dTHXc;
+ SV *ssv;
- /* If we know type upgrade shared side SV */
- if (sv && SvTYPE(ssv) < SvTYPE(sv)) {
- SHARED_CONTEXT;
- sv_upgrade(ssv, SvTYPE(*psv));
- CALLER_CONTEXT;
- }
+ assert(PL_sharedsv_lock.owner == aTHX);
+ assert(aTHX != PL_sharedsv_space);
- /* Now if requested allocate private SV */
- if (psv && !sv) {
- *psv = sv = newSV(0);
- }
+ SHARED_CONTEXT;
+ ssv = newSV(0);
+ SvREFCNT(ssv) = 0; /* will be upped to 1 by Perl_sharedsv_associate */
+ sv_upgrade(ssv, SvTYPE(sv));
+ CALLER_CONTEXT;
+ Perl_sharedsv_associate(aTHX_ sv, ssv);
+ return ssv;
+}
- /* Finally if private SV exists check and add magic */
- if (sv) {
- MAGIC *mg = 0;
- if (SvTYPE(sv) < SvTYPE(ssv)) {
- sv_upgrade(sv, SvTYPE(ssv));
- }
- switch(SvTYPE(sv)) {
- case SVt_PVAV:
- case SVt_PVHV:
- if (!(mg = mg_find(sv, PERL_MAGIC_tied))
- || mg->mg_virtual != &sharedsv_array_vtbl
- || (shared_sv *) mg->mg_ptr != data) {
- SV *obj = newSV(0);
- sv_setref_iv(obj, "threads::shared::tie",PTR2IV(data));
- if (mg) {
- sv_unmagic(sv, PERL_MAGIC_tied);
- }
- mg = sv_magicext(sv, obj, PERL_MAGIC_tied, &sharedsv_array_vtbl,
- (char *) data, 0);
- mg->mg_flags |= (MGf_COPY|MGf_DUP);
- SvREFCNT_inc(ssv);
- SvREFCNT_dec(obj);
- if(SvOBJECT(ssv)) {
- STRLEN len;
- char* stash_ptr = SvPV((SV*) SvSTASH(ssv), len);
- HV* stash = gv_stashpvn(stash_ptr, len, TRUE);
- SvOBJECT_on(sv);
- SvSTASH(sv) = (HV*)SvREFCNT_inc(stash);
- }
- }
- break;
- default:
- if ((SvTYPE(sv) < SVt_PVMG)
- || !(mg = mg_find(sv, PERL_MAGIC_shared_scalar))
- || mg->mg_virtual != &sharedsv_scalar_vtbl
- || (shared_sv *) mg->mg_ptr != data) {
- 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);
- SvREFCNT_inc(ssv);
- }
- break;
- }
- assert ( Perl_sharedsv_find(aTHX_ *psv) == data );
- }
- return data;
+/* Given a shared SV, create and return an associated private SV.
+ * Assumes lock is held */
+
+STATIC SV *
+S_sharedsv_new_private(pTHX_ SV *ssv)
+{
+ SV *sv;
+
+ assert(PL_sharedsv_lock.owner == aTHX);
+ assert(aTHX != PL_sharedsv_space);
+
+ sv = newSV(0);
+ sv_upgrade(sv, SvTYPE(ssv));
+ Perl_sharedsv_associate(aTHX_ sv, ssv);
+ return sv;
}
-void
-Perl_sharedsv_free(pTHX_ shared_sv *shared)
+
+/* a threadsafe version of SvREFCNT_dec(ssv) */
+
+STATIC void
+S_sharedsv_dec(pTHX_ SV* ssv)
{
- if (shared) {
+ if (!ssv)
+ return;
+ ENTER_LOCK;
+ if (SvREFCNT(ssv) > 1) {
+ /* no side effects, so can do it lightweight */
+ SvREFCNT_dec(ssv);
+ }
+ else {
dTHXc;
- SHARED_EDIT;
- SvREFCNT_dec(SHAREDSvPTR(shared));
- SHARED_RELEASE;
+ SHARED_CONTEXT;
+ SvREFCNT_dec(ssv);
+ CALLER_CONTEXT;
}
+ LEAVE_LOCK;
}
+/* implements Perl-level share() and :shared */
+
void
Perl_sharedsv_share(pTHX_ SV *sv)
{
default:
ENTER_LOCK;
- Perl_sharedsv_associate(aTHX_ &sv, 0, 0);
+ (void) S_sharedsv_new_shared(aTHX_ sv);
LEAVE_LOCK;
SvSETMAGIC(sv);
break;
}
}
-/* MAGIC (in mg.h sense) hooks */
+#if defined(WIN32) || defined(OS2)
+# define ABS2RELMILLI(abs) \
+ do { \
+ abs -= (double)time(NULL); \
+ if (abs > 0) { abs *= 1000; } \
+ else { abs = 0; } \
+ } while (0)
+#endif /* WIN32 || OS2 */
+
+/* do OS-specific condition timed wait */
+
+bool
+Perl_sharedsv_cond_timedwait(perl_cond *cond, perl_mutex *mut, double abs)
+{
+#if defined(NETWARE) || defined(FAKE_THREADS) || defined(I_MACH_CTHREADS)
+ Perl_croak_nocontext("cond_timedwait not supported on this platform");
+#else
+# ifdef WIN32
+ int got_it = 0;
+
+ ABS2RELMILLI(abs);
+
+ cond->waiters++;
+ MUTEX_UNLOCK(mut);
+ /* See comments in win32/win32thread.h COND_WAIT vis-a-vis race */
+ switch (WaitForSingleObject(cond->sem, (DWORD)abs)) {
+ case WAIT_OBJECT_0: got_it = 1; break;
+ case WAIT_TIMEOUT: break;
+ default:
+ /* WAIT_FAILED? WAIT_ABANDONED? others? */
+ Perl_croak_nocontext("panic: cond_timedwait (%ld)",GetLastError());
+ break;
+ }
+ MUTEX_LOCK(mut);
+ cond->waiters--;
+ return got_it;
+# else
+# ifdef OS2
+ int rc, got_it = 0;
+ STRLEN n_a;
+
+ ABS2RELMILLI(abs);
+
+ if ((rc = DosResetEventSem(*cond,&n_a)) && (rc != ERROR_ALREADY_RESET))
+ Perl_rc = rc, croak_with_os2error("panic: cond_timedwait-reset");
+ MUTEX_UNLOCK(mut);
+ if (CheckOSError(DosWaitEventSem(*cond,abs))
+ && (rc != ERROR_INTERRUPT))
+ croak_with_os2error("panic: cond_timedwait");
+ if (rc == ERROR_INTERRUPT) errno = EINTR;
+ MUTEX_LOCK(mut);
+ return got_it;
+# else /* hope you're I_PTHREAD! */
+ struct timespec ts;
+ int got_it = 0;
+
+ ts.tv_sec = (long)abs;
+ abs -= (NV)ts.tv_sec;
+ ts.tv_nsec = (long)(abs * 1000000000.0);
+
+ switch (pthread_cond_timedwait(cond, mut, &ts)) {
+ case 0: got_it = 1; break;
+ case ETIMEDOUT: break;
+ default:
+ Perl_croak_nocontext("panic: cond_timedwait");
+ break;
+ }
+ return got_it;
+# endif /* OS2 */
+# endif /* WIN32 */
+#endif /* NETWARE || FAKE_THREADS || I_MACH_CTHREADS */
+}
+
+/* ------------ PERL_MAGIC_shared_scalar(n) functions -------------- */
+
+/* get magic for PERL_MAGIC_shared_scalar(n) */
int
sharedsv_scalar_mg_get(pTHX_ SV *sv, MAGIC *mg)
{
- shared_sv *shared = (shared_sv *) mg->mg_ptr;
- assert(shared);
+ SV *ssv = (SV *) mg->mg_ptr;
+ assert(ssv);
ENTER_LOCK;
- if (SHAREDSvPTR(shared)) {
- if (SvROK(SHAREDSvPTR(shared))) {
- SV *obj = Nullsv;
- Perl_sharedsv_associate(aTHX_ &obj, SvRV(SHAREDSvPTR(shared)), NULL);
- sv_setsv_nomg(sv, &PL_sv_undef);
- SvRV(sv) = obj;
- SvROK_on(sv);
-
- }
- else {
- sv_setsv_nomg(sv, SHAREDSvPTR(shared));
- }
+ if (SvROK(ssv)) {
+ SV *obj = S_sharedsv_new_private(aTHX_ SvRV(ssv));
+ sv_setsv_nomg(sv, &PL_sv_undef);
+ SvRV_set(sv, obj);
+ SvROK_on(sv);
+ }
+ else {
+ sv_setsv_nomg(sv, ssv);
}
LEAVE_LOCK;
return 0;
}
+/* copy the contents of a private SV to a shared SV:
+ * used by various mg_set()-type functions.
+ * Assumes lock is held */
+
void
-sharedsv_scalar_store(pTHX_ SV *sv, shared_sv *shared)
+sharedsv_scalar_store(pTHX_ SV *sv, SV *ssv)
{
dTHXc;
bool allowed = TRUE;
+
+ assert(PL_sharedsv_lock.owner == aTHX);
if (SvROK(sv)) {
- shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(sv));
- if (target) {
- SV *tmp;
+ SV *obj = SvRV(sv);
+ SV *sobj = Perl_sharedsv_find(aTHX_ obj);
+ if (sobj) {
SHARED_CONTEXT;
- tmp = newRV(SHAREDSvPTR(target));
- sv_setsv_nomg(SHAREDSvPTR(shared), tmp);
- SvREFCNT_dec(tmp);
- if(SvOBJECT(SvRV(sv))) {
- SV* fake_stash = newSVpv(HvNAME(SvSTASH(SvRV(sv))),0);
- SvOBJECT_on(SHAREDSvPTR(target));
- SvSTASH(SHAREDSvPTR(target)) = (HV*)fake_stash;
+ SvUPGRADE(ssv, SVt_RV);
+ sv_setsv_nomg(ssv, &PL_sv_undef);
+
+ SvRV_set(ssv, SvREFCNT_inc(sobj));
+ SvROK_on(ssv);
+ if(SvOBJECT(obj)) {
+ SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(obj)),0);
+ SvOBJECT_on(sobj);
+ SvSTASH_set(sobj, (HV*)fake_stash);
}
CALLER_CONTEXT;
}
else {
SvTEMP_off(sv);
SHARED_CONTEXT;
- sv_setsv_nomg(SHAREDSvPTR(shared), sv);
+ sv_setsv_nomg(ssv, sv);
if(SvOBJECT(sv)) {
- SV* fake_stash = newSVpv(HvNAME(SvSTASH(sv)),0);
- SvOBJECT_on(SHAREDSvPTR(shared));
- SvSTASH(SHAREDSvPTR(shared)) = (HV*)fake_stash;
+ SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(sv)),0);
+ SvOBJECT_on(ssv);
+ SvSTASH_set(ssv, (HV*)fake_stash);
}
CALLER_CONTEXT;
}
}
}
+/* set magic for PERL_MAGIC_shared_scalar(n) */
+
int
sharedsv_scalar_mg_set(pTHX_ SV *sv, MAGIC *mg)
{
- shared_sv *shared;
+ SV *ssv = (SV*)(mg->mg_ptr);
+ assert(ssv);
ENTER_LOCK;
- /* We call associate to potentially upgrade shared side SV */
- shared = Perl_sharedsv_associate(aTHX_ &sv, Nullsv, (shared_sv *) mg->mg_ptr);
- assert(shared);
- sharedsv_scalar_store(aTHX_ sv, shared);
+ if (SvTYPE(ssv) < SvTYPE(sv)) {
+ dTHXc;
+ SHARED_CONTEXT;
+ sv_upgrade(ssv, SvTYPE(sv));
+ CALLER_CONTEXT;
+ }
+ sharedsv_scalar_store(aTHX_ sv, ssv);
LEAVE_LOCK;
return 0;
}
+/* free magic for PERL_MAGIC_shared_scalar(n) */
+
int
sharedsv_scalar_mg_free(pTHX_ SV *sv, MAGIC *mg)
{
- shared_sv *shared = (shared_sv *) mg->mg_ptr;
-#if 0
- assert (SvREFCNT(SHAREDSvPTR(shared)) < 1000);
-#endif
- Perl_sharedsv_free(aTHX_ shared);
+ S_sharedsv_dec(aTHX_ (SV*)mg->mg_ptr);
return 0;
}
+/*
+ * Called during cloning of PERL_MAGIC_shared_scalar(n) magic in new thread
+ */
int
-sharedsv_scalar_mg_clear(pTHX_ SV *sv, MAGIC *mg)
+sharedsv_scalar_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
{
+ SvREFCNT_inc(mg->mg_ptr);
return 0;
}
/*
- * Called during cloning of new threads
+ * Called during local $shared
*/
int
-sharedsv_scalar_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
+sharedsv_scalar_mg_local(pTHX_ SV* nsv, MAGIC *mg)
{
- shared_sv *shared = (shared_sv *) mg->mg_ptr;
- if (shared) {
- SvREFCNT_inc(SHAREDSvPTR(shared));
+ MAGIC *nmg;
+ SV *ssv = (SV *) mg->mg_ptr;
+ if (ssv) {
+ ENTER_LOCK;
+ SvREFCNT_inc(ssv);
+ LEAVE_LOCK;
}
+ nmg = sv_magicext(nsv, mg->mg_obj, mg->mg_type, mg->mg_virtual,
+ mg->mg_ptr, mg->mg_len);
+ nmg->mg_flags = mg->mg_flags;
+ nmg->mg_private = mg->mg_private;
+
return 0;
}
sharedsv_scalar_mg_get, /* get */
sharedsv_scalar_mg_set, /* set */
0, /* len */
- sharedsv_scalar_mg_clear, /* clear */
+ 0, /* clear */
sharedsv_scalar_mg_free, /* free */
0, /* copy */
- sharedsv_scalar_mg_dup /* dup */
+ sharedsv_scalar_mg_dup, /* dup */
+ sharedsv_scalar_mg_local /* local */
};
-/* Now the arrays/hashes stuff */
+/* ------------ PERL_MAGIC_tiedelem(p) functions -------------- */
+
+/* get magic for PERL_MAGIC_tiedelem(p) */
+
int
sharedsv_elem_mg_FETCH(pTHX_ SV *sv, MAGIC *mg)
{
dTHXc;
- shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj);
- shared_sv *target = Perl_sharedsv_find(aTHX_ sv);
+ SV *saggregate = S_sharedsv_from_obj(aTHX_ mg->mg_obj);
SV** svp;
- assert ( shared );
- assert ( SHAREDSvPTR(shared) );
-
ENTER_LOCK;
- if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ if (SvTYPE(saggregate) == SVt_PVAV) {
assert ( mg->mg_ptr == 0 );
SHARED_CONTEXT;
- svp = av_fetch((AV*) SHAREDSvPTR(shared), mg->mg_len, 0);
+ svp = av_fetch((AV*) saggregate, mg->mg_len, 0);
}
else {
char *key = mg->mg_ptr;
key = SvPV((SV *) mg->mg_ptr, len);
}
SHARED_CONTEXT;
- svp = hv_fetch((HV*) SHAREDSvPTR(shared), key, len, 0);
+ svp = hv_fetch((HV*) saggregate, key, len, 0);
}
CALLER_CONTEXT;
if (svp) {
/* Exists in the array */
- target = Perl_sharedsv_associate(aTHX_ &sv, *svp, target);
- sv_setsv(sv, *svp);
+ if (SvROK(*svp)) {
+ SV *obj = S_sharedsv_new_private(aTHX_ SvRV(*svp));
+ sv_setsv_nomg(sv, &PL_sv_undef);
+ SvRV_set(sv, obj);
+ SvROK_on(sv);
+ SvSETMAGIC(sv);
+ }
+ else {
+ /* XXX can this branch ever happen? DAPM */
+ /* XXX assert("no such branch"); */
+ Perl_sharedsv_associate(aTHX_ sv, *svp);
+ sv_setsv(sv, *svp);
+ }
}
else {
/* Not in the array */
return 0;
}
+/* set magic for PERL_MAGIC_tiedelem(p) */
+
int
sharedsv_elem_mg_STORE(pTHX_ SV *sv, MAGIC *mg)
{
dTHXc;
- shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj);
- shared_sv *target;
+ SV *saggregate = S_sharedsv_from_obj(aTHX_ mg->mg_obj);
SV **svp;
/* 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
*/
ENTER_LOCK;
- assert(shared);
- assert(SHAREDSvPTR(shared));
- if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ assert(saggregate);
+ if (SvTYPE(saggregate) == SVt_PVAV) {
assert ( mg->mg_ptr == 0 );
SHARED_CONTEXT;
- svp = av_fetch((AV*) SHAREDSvPTR(shared), mg->mg_len, 1);
+ svp = av_fetch((AV*) saggregate, mg->mg_len, 1);
}
else {
char *key = mg->mg_ptr;
if (mg->mg_len == HEf_SVKEY)
key = SvPV((SV *) mg->mg_ptr, len);
SHARED_CONTEXT;
- svp = hv_fetch((HV*) SHAREDSvPTR(shared), key, len, 1);
+ svp = hv_fetch((HV*) saggregate, key, len, 1);
}
CALLER_CONTEXT;
- target = Perl_sharedsv_associate(aTHX_ &sv, *svp, 0);
- sharedsv_scalar_store(aTHX_ sv, target);
+ Perl_sharedsv_associate(aTHX_ sv, *svp);
+ sharedsv_scalar_store(aTHX_ sv, *svp);
LEAVE_LOCK;
return 0;
}
+/* clear magic for PERL_MAGIC_tiedelem(p) */
+
int
sharedsv_elem_mg_DELETE(pTHX_ SV *sv, MAGIC *mg)
{
dTHXc;
- shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj);
+ MAGIC *shmg;
+ SV *saggregate = S_sharedsv_from_obj(aTHX_ mg->mg_obj);
ENTER_LOCK;
sharedsv_elem_mg_FETCH(aTHX_ sv, mg);
- if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
+ if ((shmg = mg_find(sv, PERL_MAGIC_shared_scalar)))
+ sharedsv_scalar_mg_get(aTHX_ sv, shmg);
+ if (SvTYPE(saggregate) == SVt_PVAV) {
SHARED_CONTEXT;
- av_delete((AV*) SHAREDSvPTR(shared), mg->mg_len, G_DISCARD);
+ av_delete((AV*) saggregate, mg->mg_len, G_DISCARD);
}
else {
char *key = mg->mg_ptr;
if (mg->mg_len == HEf_SVKEY)
key = SvPV((SV *) mg->mg_ptr, len);
SHARED_CONTEXT;
- hv_delete((HV*) SHAREDSvPTR(shared), key, len, G_DISCARD);
+ hv_delete((HV*) saggregate, key, len, G_DISCARD);
}
CALLER_CONTEXT;
LEAVE_LOCK;
return 0;
}
-int
-sharedsv_elem_mg_free(pTHX_ SV *sv, MAGIC *mg)
-{
- Perl_sharedsv_free(aTHX_ SV_to_sharedsv(aTHX_ mg->mg_obj));
- return 0;
-}
+/* Called during cloning of PERL_MAGIC_tiedelem(p) magic in new
+ * thread */
int
sharedsv_elem_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
{
- shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj);
- SvREFCNT_inc(SHAREDSvPTR(shared));
- mg->mg_flags |= MGf_DUP;
+ SvREFCNT_inc(S_sharedsv_from_obj(aTHX_ mg->mg_obj));
+ assert(mg->mg_flags & MGf_DUP);
return 0;
}
sharedsv_elem_mg_STORE, /* set */
0, /* len */
sharedsv_elem_mg_DELETE, /* clear */
- sharedsv_elem_mg_free, /* free */
+ 0, /* free */
0, /* copy */
- sharedsv_elem_mg_dup /* dup */
+ sharedsv_elem_mg_dup, /* dup */
+ 0 /* local */
};
+/* ------------ PERL_MAGIC_tied(P) functions -------------- */
+
+/* len magic for PERL_MAGIC_tied(P) */
+
U32
sharedsv_array_mg_FETCHSIZE(pTHX_ SV *sv, MAGIC *mg)
{
dTHXc;
- shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ SV *ssv = (SV *) mg->mg_ptr;
U32 val;
SHARED_EDIT;
- if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
- val = av_len((AV*) SHAREDSvPTR(shared));
+ if (SvTYPE(ssv) == SVt_PVAV) {
+ val = av_len((AV*) ssv);
}
else {
/* not actually defined by tie API but ... */
- val = HvKEYS((HV*) SHAREDSvPTR(shared));
+ val = HvKEYS((HV*) ssv);
}
SHARED_RELEASE;
return val;
}
+/* clear magic for PERL_MAGIC_tied(P) */
+
int
sharedsv_array_mg_CLEAR(pTHX_ SV *sv, MAGIC *mg)
{
dTHXc;
- shared_sv *shared = (shared_sv *) mg->mg_ptr;
+ SV *ssv = (SV *) mg->mg_ptr;
SHARED_EDIT;
- if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
- av_clear((AV*) SHAREDSvPTR(shared));
+ if (SvTYPE(ssv) == SVt_PVAV) {
+ av_clear((AV*) ssv);
}
else {
- hv_clear((HV*) SHAREDSvPTR(shared));
+ hv_clear((HV*) ssv);
}
SHARED_RELEASE;
return 0;
}
+/* free magic for PERL_MAGIC_tied(P) */
+
int
sharedsv_array_mg_free(pTHX_ SV *sv, MAGIC *mg)
{
- Perl_sharedsv_free(aTHX_ (shared_sv *) mg->mg_ptr);
+ S_sharedsv_dec(aTHX_ (SV*)mg->mg_ptr);
return 0;
}
/*
+ * copy magic for PERL_MAGIC_tied(P)
* This is called when perl is about to access an element of
* the array -
*/
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);
- ENTER_LOCK;
- SvREFCNT_inc(SHAREDSvPTR(shared));
- LEAVE_LOCK;
nmg->mg_flags |= MGf_DUP;
return 1;
}
+/* Called during cloning of PERL_MAGIC_tied(P) magic in new thread */
+
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;
+ SvREFCNT_inc((SV*)mg->mg_ptr);
+ assert(mg->mg_flags & MGf_DUP);
return 0;
}
sharedsv_array_mg_CLEAR, /* clear */
sharedsv_array_mg_free, /* free */
sharedsv_array_mg_copy, /* copy */
- sharedsv_array_mg_dup /* dup */
+ sharedsv_array_mg_dup, /* dup */
+ 0 /* local */
};
=for apidoc sharedsv_unlock
=cut
void
-Perl_sharedsv_unlock(pTHX_ shared_sv* ssv)
+Perl_sharedsv_unlock(pTHX_ SV *ssv)
{
- recursive_lock_release(aTHX_ &ssv->lock);
+ user_lock *ul = S_get_userlock(aTHX_ ssv, 0);
+ assert(ul);
+ recursive_lock_release(aTHX_ &ul->lock);
}
=for apidoc sharedsv_lock
=cut
void
-Perl_sharedsv_lock(pTHX_ shared_sv* ssv)
+Perl_sharedsv_lock(pTHX_ SV *ssv)
{
+ user_lock *ul;
if (!ssv)
return;
- recursive_lock_acquire(aTHX_ &ssv->lock, __FILE__, __LINE__);
+ ul = S_get_userlock(aTHX_ ssv, 1);
+ recursive_lock_acquire(aTHX_ &ul->lock, __FILE__, __LINE__);
}
/* handles calls from lock() builtin via PL_lockhook */
void
Perl_sharedsv_locksv(pTHX_ SV *sv)
{
- shared_sv* shared;
+ SV *ssv;
if(SvROK(sv))
sv = SvRV(sv);
- shared = Perl_sharedsv_find(aTHX_ sv);
- if(!shared)
+ ssv = Perl_sharedsv_find(aTHX_ sv);
+ if(!ssv)
croak("lock can only be used on shared values");
- Perl_sharedsv_lock(aTHX_ shared);
+ Perl_sharedsv_lock(aTHX_ ssv);
}
=head1 Shared SV Functions
#ifdef USE_ITHREADS
void
-PUSH(shared_sv *shared, ...)
+PUSH(SV *obj, ...)
CODE:
dTHXc;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
int i;
for(i = 1; i < items; i++) {
SV* tmp = newSVsv(ST(i));
- shared_sv *target;
+ SV *stmp;
ENTER_LOCK;
- target = Perl_sharedsv_associate(aTHX_ &tmp, Nullsv, 0);
- sharedsv_scalar_store(aTHX_ tmp, target);
+ stmp = S_sharedsv_new_shared(aTHX_ tmp);
+ sharedsv_scalar_store(aTHX_ tmp, stmp);
SHARED_CONTEXT;
- av_push((AV*) SHAREDSvPTR(shared), SHAREDSvPTR(target));
- SvREFCNT_inc(SHAREDSvPTR(target));
+ av_push((AV*) sobj, stmp);
+ SvREFCNT_inc(stmp);
SHARED_RELEASE;
SvREFCNT_dec(tmp);
}
void
-UNSHIFT(shared_sv *shared, ...)
+UNSHIFT(SV *obj, ...)
CODE:
dTHXc;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
int i;
ENTER_LOCK;
SHARED_CONTEXT;
- av_unshift((AV*)SHAREDSvPTR(shared), items - 1);
+ av_unshift((AV*)sobj, 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);
- sharedsv_scalar_store(aTHX_ tmp, target);
+ SV *tmp = newSVsv(ST(i));
+ SV *stmp = S_sharedsv_new_shared(aTHX_ tmp);
+ sharedsv_scalar_store(aTHX_ tmp, stmp);
SHARED_CONTEXT;
- av_store((AV*) SHAREDSvPTR(shared), i - 1, SHAREDSvPTR(target));
- SvREFCNT_inc(SHAREDSvPTR(target));
+ av_store((AV*) sobj, i - 1, stmp);
+ SvREFCNT_inc(stmp);
CALLER_CONTEXT;
SvREFCNT_dec(tmp);
}
LEAVE_LOCK;
void
-POP(shared_sv *shared)
+POP(SV *obj)
CODE:
dTHXc;
- SV* sv;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+ SV* ssv;
ENTER_LOCK;
SHARED_CONTEXT;
- sv = av_pop((AV*)SHAREDSvPTR(shared));
+ ssv = av_pop((AV*)sobj);
CALLER_CONTEXT;
ST(0) = sv_newmortal();
- Perl_sharedsv_associate(aTHX_ &ST(0), sv, 0);
- SvREFCNT_dec(sv);
+ Perl_sharedsv_associate(aTHX_ ST(0), ssv);
+ SvREFCNT_dec(ssv);
LEAVE_LOCK;
XSRETURN(1);
void
-SHIFT(shared_sv *shared)
+SHIFT(SV *obj)
CODE:
dTHXc;
- SV* sv;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+ SV* ssv;
ENTER_LOCK;
SHARED_CONTEXT;
- sv = av_shift((AV*)SHAREDSvPTR(shared));
+ ssv = av_shift((AV*)sobj);
CALLER_CONTEXT;
ST(0) = sv_newmortal();
- Perl_sharedsv_associate(aTHX_ &ST(0), sv, 0);
- SvREFCNT_dec(sv);
+ Perl_sharedsv_associate(aTHX_ ST(0), ssv);
+ SvREFCNT_dec(ssv);
LEAVE_LOCK;
XSRETURN(1);
void
-EXTEND(shared_sv *shared, IV count)
+EXTEND(SV *obj, IV count)
CODE:
dTHXc;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
SHARED_EDIT;
- av_extend((AV*)SHAREDSvPTR(shared), count);
+ av_extend((AV*)sobj, count);
SHARED_RELEASE;
void
-STORESIZE(shared_sv *shared,IV count)
+STORESIZE(SV *obj,IV count)
CODE:
dTHXc;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
SHARED_EDIT;
- av_fill((AV*) SHAREDSvPTR(shared), count);
+ av_fill((AV*) sobj, count);
SHARED_RELEASE;
void
-EXISTS(shared_sv *shared, SV *index)
+EXISTS(SV *obj, SV *index)
CODE:
dTHXc;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
bool exists;
- SHARED_EDIT;
- if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) {
- exists = av_exists((AV*) SHAREDSvPTR(shared), SvIV(index));
+ if (SvTYPE(sobj) == SVt_PVAV) {
+ SHARED_EDIT;
+ exists = av_exists((AV*) sobj, SvIV(index));
}
else {
STRLEN len;
char *key = SvPV(index,len);
- exists = hv_exists((HV*) SHAREDSvPTR(shared), key, len);
+ SHARED_EDIT;
+ exists = hv_exists((HV*) sobj, key, len);
}
SHARED_RELEASE;
ST(0) = (exists) ? &PL_sv_yes : &PL_sv_no;
void
-FIRSTKEY(shared_sv *shared)
+FIRSTKEY(SV *obj)
CODE:
dTHXc;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
char* key = NULL;
I32 len = 0;
HE* entry;
ENTER_LOCK;
SHARED_CONTEXT;
- hv_iterinit((HV*) SHAREDSvPTR(shared));
- entry = hv_iternext((HV*) SHAREDSvPTR(shared));
+ hv_iterinit((HV*) sobj);
+ entry = hv_iternext((HV*) sobj);
if (entry) {
key = hv_iterkey(entry,&len);
CALLER_CONTEXT;
XSRETURN(1);
void
-NEXTKEY(shared_sv *shared, SV *oldkey)
+NEXTKEY(SV *obj, SV *oldkey)
CODE:
dTHXc;
+ SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
char* key = NULL;
I32 len = 0;
HE* entry;
ENTER_LOCK;
SHARED_CONTEXT;
- entry = hv_iternext((HV*) SHAREDSvPTR(shared));
+ entry = hv_iternext((HV*) sobj);
if (entry) {
key = hv_iterkey(entry,&len);
CALLER_CONTEXT;
_id(SV *ref)
PROTOTYPE: \[$@%]
CODE:
- shared_sv *shared;
+ SV *ssv;
ref = SvRV(ref);
if(SvROK(ref))
ref = SvRV(ref);
- if( (shared = Perl_sharedsv_find(aTHX_ ref)) ){
- ST(0) = sv_2mortal(newSViv(PTR2IV(shared)));
+ if( (ssv = Perl_sharedsv_find(aTHX_ ref)) ){
+ ST(0) = sv_2mortal(newSViv(PTR2IV(ssv)));
XSRETURN(1);
}
XSRETURN_UNDEF;
_refcnt(SV *ref)
PROTOTYPE: \[$@%]
CODE:
- shared_sv *shared;
+ SV *ssv;
ref = SvRV(ref);
if(SvROK(ref))
ref = SvRV(ref);
- if( (shared = Perl_sharedsv_find(aTHX_ ref)) ){
- if (SHAREDSvPTR(shared)) {
- ST(0) = sv_2mortal(newSViv(SvREFCNT(SHAREDSvPTR(shared))));
+ if( (ssv = Perl_sharedsv_find(aTHX_ ref)) ) {
+ ST(0) = sv_2mortal(newSViv(SvREFCNT(ssv)));
XSRETURN(1);
- }
- else {
- Perl_warn(aTHX_ "%" SVf " s=%p has no shared SV",ST(0),shared);
- }
}
else {
Perl_warn(aTHX_ "%" SVf " is not shared",ST(0));
lock_enabled(SV *ref)
PROTOTYPE: \[$@%]
CODE:
- shared_sv* shared;
+ SV *ssv;
if(!SvROK(ref))
Perl_croak(aTHX_ "Argument to lock needs to be passed as ref");
ref = SvRV(ref);
if(SvROK(ref))
ref = SvRV(ref);
- shared = Perl_sharedsv_find(aTHX_ ref);
- if(!shared)
+ ssv = Perl_sharedsv_find(aTHX_ ref);
+ if(!ssv)
croak("lock can only be used on shared values");
- Perl_sharedsv_lock(aTHX_ shared);
+ Perl_sharedsv_lock(aTHX_ ssv);
void
-cond_wait_enabled(SV *ref)
- PROTOTYPE: \[$@%]
- CODE:
- shared_sv* shared;
+cond_wait_enabled(SV *ref_cond, SV *ref_lock = 0)
+ PROTOTYPE: \[$@%];\[$@%]
+ PREINIT:
+ SV *ssv;
+ perl_cond* user_condition;
int locks;
- if(!SvROK(ref))
+ int same = 0;
+ user_lock *ul;
+
+ CODE:
+ if (!ref_lock || ref_lock == ref_cond) same = 1;
+
+ if(!SvROK(ref_cond))
Perl_croak(aTHX_ "Argument to cond_wait needs to be passed as ref");
- ref = SvRV(ref);
- if(SvROK(ref))
- ref = SvRV(ref);
- shared = Perl_sharedsv_find(aTHX_ ref);
- if(!shared)
+ ref_cond = SvRV(ref_cond);
+ if(SvROK(ref_cond))
+ ref_cond = SvRV(ref_cond);
+ ssv = Perl_sharedsv_find(aTHX_ ref_cond);
+ if(!ssv)
croak("cond_wait can only be used on shared values");
- if(shared->lock.owner != aTHX)
+ ul = S_get_userlock(aTHX_ ssv, 1);
+
+ user_condition = &ul->user_cond;
+ if (! same) {
+ if (!SvROK(ref_lock))
+ Perl_croak(aTHX_ "cond_wait lock needs to be passed as ref");
+ ref_lock = SvRV(ref_lock);
+ if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock);
+ ssv = Perl_sharedsv_find(aTHX_ ref_lock);
+ if (!ssv)
+ croak("cond_wait lock must be a shared value");
+ ul = S_get_userlock(aTHX_ ssv, 1);
+ }
+ if(ul->lock.owner != aTHX)
croak("You need a lock before you can cond_wait");
/* Stealing the members of the lock object worries me - NI-S */
- MUTEX_LOCK(&shared->lock.mutex);
- shared->lock.owner = NULL;
- locks = shared->lock.locks;
- shared->lock.locks = 0;
+ MUTEX_LOCK(&ul->lock.mutex);
+ ul->lock.owner = NULL;
+ locks = ul->lock.locks;
+ ul->lock.locks = 0;
+
+ /* since we are releasing the lock here we need to tell other
+ people that is ok to go ahead and use it */
+ COND_SIGNAL(&ul->lock.cond);
+ COND_WAIT(user_condition, &ul->lock.mutex);
+ while(ul->lock.owner != NULL) {
+ /* OK -- must reacquire the lock */
+ COND_WAIT(&ul->lock.cond, &ul->lock.mutex);
+ }
+ ul->lock.owner = aTHX;
+ ul->lock.locks = locks;
+ MUTEX_UNLOCK(&ul->lock.mutex);
+
+int
+cond_timedwait_enabled(SV *ref_cond, double abs, SV *ref_lock = 0)
+ PROTOTYPE: \[$@%]$;\[$@%]
+ PREINIT:
+ SV *ssv;
+ perl_cond* user_condition;
+ int locks;
+ int same = 0;
+ user_lock *ul;
+
+ CODE:
+ if (!ref_lock || ref_cond == ref_lock) same = 1;
+
+ if(!SvROK(ref_cond))
+ Perl_croak(aTHX_ "Argument to cond_timedwait needs to be passed as ref");
+ ref_cond = SvRV(ref_cond);
+ if(SvROK(ref_cond))
+ ref_cond = SvRV(ref_cond);
+ ssv = Perl_sharedsv_find(aTHX_ ref_cond);
+ if(!ssv)
+ croak("cond_timedwait can only be used on shared values");
+ ul = S_get_userlock(aTHX_ ssv, 1);
+
+ user_condition = &ul->user_cond;
+ if (! same) {
+ if (!SvROK(ref_lock))
+ Perl_croak(aTHX_ "cond_timedwait lock needs to be passed as ref");
+ ref_lock = SvRV(ref_lock);
+ if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock);
+ ssv = Perl_sharedsv_find(aTHX_ ref_lock);
+ if (!ssv)
+ croak("cond_timedwait lock must be a shared value");
+ ul = S_get_userlock(aTHX_ ssv, 1);
+ }
+ if(ul->lock.owner != aTHX)
+ croak("You need a lock before you can cond_wait");
+ MUTEX_LOCK(&ul->lock.mutex);
+ ul->lock.owner = NULL;
+ locks = ul->lock.locks;
+ ul->lock.locks = 0;
/* since we are releasing the lock here we need to tell other
people that is ok to go ahead and use it */
- COND_SIGNAL(&shared->lock.cond);
- COND_WAIT(&shared->user_cond, &shared->lock.mutex);
- while(shared->lock.owner != NULL) {
- COND_WAIT(&shared->lock.cond,&shared->lock.mutex);
- }
- shared->lock.owner = aTHX;
- shared->lock.locks = locks;
- MUTEX_UNLOCK(&shared->lock.mutex);
+ COND_SIGNAL(&ul->lock.cond);
+ RETVAL = Perl_sharedsv_cond_timedwait(user_condition, &ul->lock.mutex, abs);
+ while (ul->lock.owner != NULL) {
+ /* OK -- must reacquire the lock... */
+ COND_WAIT(&ul->lock.cond, &ul->lock.mutex);
+ }
+ ul->lock.owner = aTHX;
+ ul->lock.locks = locks;
+ MUTEX_UNLOCK(&ul->lock.mutex);
+
+ if (RETVAL == 0)
+ XSRETURN_UNDEF;
+ OUTPUT:
+ RETVAL
void
cond_signal_enabled(SV *ref)
PROTOTYPE: \[$@%]
CODE:
- shared_sv* shared;
+ SV *ssv;
+ user_lock *ul;
+
if(!SvROK(ref))
Perl_croak(aTHX_ "Argument to cond_signal needs to be passed as ref");
ref = SvRV(ref);
if(SvROK(ref))
ref = SvRV(ref);
- shared = Perl_sharedsv_find(aTHX_ ref);
- if (ckWARN(WARN_THREADS) && shared->lock.owner != aTHX)
+ ssv = Perl_sharedsv_find(aTHX_ ref);
+ if(!ssv)
+ croak("cond_signal can only be used on shared values");
+ ul = S_get_userlock(aTHX_ ssv, 1);
+ if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX)
Perl_warner(aTHX_ packWARN(WARN_THREADS),
"cond_signal() called on unlocked variable");
- if(!shared)
- croak("cond_signal can only be used on shared values");
- COND_SIGNAL(&shared->user_cond);
+ COND_SIGNAL(&ul->user_cond);
void
cond_broadcast_enabled(SV *ref)
PROTOTYPE: \[$@%]
CODE:
- shared_sv* shared;
+ SV *ssv;
+ user_lock *ul;
+
if(!SvROK(ref))
Perl_croak(aTHX_ "Argument to cond_broadcast needs to be passed as ref");
ref = SvRV(ref);
if(SvROK(ref))
ref = SvRV(ref);
- shared = Perl_sharedsv_find(aTHX_ ref);
- if(!shared)
+ ssv = Perl_sharedsv_find(aTHX_ ref);
+ if(!ssv)
croak("cond_broadcast can only be used on shared values");
- if (ckWARN(WARN_THREADS) && shared->lock.owner != aTHX)
+ ul = S_get_userlock(aTHX_ ssv, 1);
+ if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX)
Perl_warner(aTHX_ packWARN(WARN_THREADS),
"cond_broadcast() called on unlocked variable");
- COND_BROADCAST(&shared->user_cond);
+ COND_BROADCAST(&ul->user_cond);
SV*
CODE:
{
HV* stash;
- shared_sv* shared;
+ SV *ssv;
if (items == 1)
stash = CopSTASH(PL_curcop);
else {
- SV* ssv = ST(1);
+ SV* classname = ST(1);
STRLEN len;
char *ptr;
- if (ssv && !SvGMAGICAL(ssv) && !SvAMAGIC(ssv) && SvROK(ssv))
+ if (classname && !SvGMAGICAL(classname) &&
+ !SvAMAGIC(classname) && SvROK(classname))
Perl_croak(aTHX_ "Attempt to bless into a reference");
- ptr = SvPV(ssv,len);
+ ptr = SvPV(classname,len);
if (ckWARN(WARN_MISC) && len == 0)
Perl_warner(aTHX_ packWARN(WARN_MISC),
"Explicit blessing to '' (assuming package main)");
SvREFCNT_inc(ref);
(void)sv_bless(ref, stash);
RETVAL = ref;
- shared = Perl_sharedsv_find(aTHX_ ref);
- if(shared) {
+ ssv = Perl_sharedsv_find(aTHX_ ref);
+ if(ssv) {
dTHXc;
ENTER_LOCK;
SHARED_CONTEXT;
{
- SV* fake_stash = newSVpv(HvNAME(stash),0);
- (void)sv_bless(SHAREDSvPTR(shared),(HV*)fake_stash);
+ SV* fake_stash = newSVpv(HvNAME_get(stash),0);
+ (void)sv_bless(ssv,(HV*)fake_stash);
}
CALLER_CONTEXT;
LEAVE_LOCK;
Perl_sharedsv_init(aTHX);
#endif /* USE_ITHREADS */
}
-
-
-
projects / p5sagit/p5-mst-13.2.git / blobdiff