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|
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#define NEED_PL_signals
#include "ppport.h"
#define MY_CXT_KEY "threads::shared::_guts" XS_VERSION
typedef struct {
int dummy; /* you can access this elsewhere as MY_CXT.dummy */
} my_cxt_t;
START_MY_CXT
/* Scope hook to determine when a locked variable should be unlocked */
void
exec_leave(pTHX_ SV *both) {
U32 process;
U32 ordinal;
AV *av_ord_lock;
dSP;
ENTER;
SAVETMPS;
av_ord_lock = (AV*)SvRV(both);
process = (U32)SvUV((SV*)*av_fetch(av_ord_lock, 1, 0));
ordinal = (U32)SvUV((SV*)*av_fetch(av_ord_lock, 2, 0));
/* printf ("unlock: ordinal = %d, process = %d\n",ordinal,process); */
SvREFCNT_dec(av_ord_lock);
SvREFCNT_dec(both);
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVuv(ordinal)));
PUTBACK;
if (process == getpid()) {
call_pv( "threads::shared::_unlock",G_DISCARD );
}
SPAGAIN;
PUTBACK;
FREETMPS;
LEAVE;
}
/* Implements Perl-level share() and :shared */
void
Perl_sharedsv_share(pTHX_ SV *sv)
{
dSP;
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:
ENTER;
SAVETMPS;
PUSHMARK(sp);
XPUSHs(sv_2mortal(newRV_inc(sv)));
PUTBACK;
call_pv( "threads::shared::_share",G_DISCARD );
SPAGAIN;
PUTBACK;
FREETMPS;
LEAVE;
break;
}
}
/* Inititalize core Perl hooks */
void
Perl_sharedsv_init(pTHX)
{
/* PL_lockhook = &Perl_sharedsv_locksv; */
#ifdef PL_sharehook
PL_sharehook = &Perl_sharedsv_share;
#endif
#ifdef PL_destroyhook
/* PL_destroyhook = &Perl_shared_object_destroy; */
#endif
}
MODULE = forks PACKAGE = threads::shared
#----------------------------------------------------------------------
# OUT: 1 boolean value indicating whether core hook PL_sharehook exists
bool
__DEF_PL_sharehook()
CODE:
#ifdef PL_sharehook
RETVAL = 1;
#else
RETVAL = 0;
#endif
OUTPUT:
RETVAL
#----------------------------------------------------------------------
# OUT: 1 boolean value indicating whether unsafe signals are in use
bool
_check_pl_signal_unsafe_flag()
PREINIT:
U32 flags;
CODE:
flags = PL_signals & PERL_SIGNALS_UNSAFE_FLAG;
if (flags == 0) {
RETVAL = 0;
} else {
RETVAL = 1;
}
OUTPUT:
RETVAL
#----------------------------------------------------------------------
# IN: 1 any variable (scalar,array,hash,glob)
# OUT: 1 reference to that variable
SV*
share(SV *myref)
PROTOTYPE: \[$@%]
CODE:
if (!SvROK(myref))
Perl_croak(aTHX_ "Argument to share needs to be passed as ref");
myref = SvRV(myref);
if(SvROK(myref))
myref = SvRV(myref);
Perl_sharedsv_share(aTHX_ myref);
RETVAL = newRV_inc(myref);
OUTPUT:
RETVAL
#----------------------------------------------------------------------
# IN: 1 any variable (scalar,array,hash,glob)
void
lock(SV *myref)
PROTOTYPE: \[$@%]
PPCODE:
int count;
U32 process;
U32 ordinal;
AV *av_ord_lock;
LEAVE;
if (!SvROK(myref))
Perl_croak(aTHX_ "Argument to lock needs to be passed as ref");
myref = SvRV(myref);
if(SvROK(myref))
myref = SvRV(myref);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv("_lock",0)));
XPUSHs(sv_2mortal(newRV_inc(myref)));
PUTBACK;
process = getpid();
count = call_pv( "threads::shared::_remote",G_SCALAR );
SPAGAIN;
ordinal = POPl;
/* printf ("lock: ordinal = %d, process = %d\n",ordinal,process); */
PUTBACK;
FREETMPS;
LEAVE;
av_ord_lock = newAV();
av_store(av_ord_lock, 1, newSVuv(process));
av_store(av_ord_lock, 2, newSVuv(ordinal));
SAVEDESTRUCTOR_X(exec_leave,newRV((SV*)av_ord_lock));
ENTER;
#----------------------------------------------------------------------
# IN: 1 any variable (scalar,array,hash,glob) -- signal variable
# 2 any variable (scalar,array,hash,glob) -- lock variable
void
cond_wait(SV *myref, SV *myref2 = 0)
PROTOTYPE: \[$@%];\[$@%]
CODE:
if (!SvROK(myref))
Perl_croak(aTHX_ "Argument to cond_wait needs to be passed as ref");
myref = SvRV(myref);
if(SvROK(myref))
myref = SvRV(myref);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv("_wait",0)));
XPUSHs(sv_2mortal(newRV_inc(myref)));
if (myref2 && myref != myref2)
{
if (!SvROK(myref2))
Perl_croak(aTHX_ "cond_wait lock needs to be passed as ref");
myref2 = SvRV(myref2);
if(SvROK(myref2))
myref2 = SvRV(myref2);
XPUSHs(sv_2mortal(newRV_inc(myref2)));
}
PUTBACK;
call_pv( "threads::shared::_remote",G_DISCARD );
FREETMPS;
LEAVE;
#----------------------------------------------------------------------
# IN: 1 any variable (scalar,array,hash,glob) -- signal variable
# 2 epoch time of event expiration
# 3 any variable (scalar,array,hash,glob) -- lock variable
int
cond_timedwait(SV *myref, double epochts, SV *myref2 = 0)
PROTOTYPE: \[$@%]$;\[$@%]
PREINIT:
int count;
bool retval;
U32 ordinal;
CODE:
if (!SvROK(myref))
Perl_croak(aTHX_ "Argument to cond_timedwait needs to be passed as ref");
myref = SvRV(myref);
if(SvROK(myref))
myref = SvRV(myref);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv("_timedwait",0)));
XPUSHs(sv_2mortal(newRV_inc(myref)));
XPUSHs(sv_2mortal(newSVnv(epochts)));
if (myref2 && myref != myref2)
{
if (!SvROK(myref2))
Perl_croak(aTHX_ "cond_timedwait lock needs to be passed as ref");
myref2 = SvRV(myref2);
if(SvROK(myref2))
myref2 = SvRV(myref2);
XPUSHs(sv_2mortal(newRV_inc(myref2)));
}
PUTBACK;
count = call_pv( "threads::shared::_remote",G_ARRAY );
SPAGAIN;
if (count != 2)
croak ("Error receiving response value from _remote\n");
retval = POPi;
ordinal = POPi;
PUTBACK;
FREETMPS;
LEAVE;
RETVAL = retval;
if (RETVAL == 0)
XSRETURN_UNDEF;
OUTPUT:
RETVAL
#----------------------------------------------------------------------
# IN: 1 any variable (scalar,array,hash,glob)
void
cond_signal(SV *myref)
PROTOTYPE: \[$@%]
CODE:
if (!SvROK(myref))
Perl_croak(aTHX_ "Argument to cond_signal needs to be passed as ref");
myref = SvRV(myref);
if(SvROK(myref))
myref = SvRV(myref);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv("_signal",0)));
XPUSHs(sv_2mortal(newRV_inc(myref)));
PUTBACK;
call_pv( "threads::shared::_remote",G_DISCARD );
FREETMPS;
LEAVE;
#----------------------------------------------------------------------
# IN: 1 any variable (scalar,array,hash,glob)
void
cond_broadcast(SV *myref)
PROTOTYPE: \[$@%]
CODE:
if (!SvROK(myref))
Perl_croak(aTHX_ "Argument to cond_broadcast needs to be passed as ref");
myref = SvRV(myref);
if(SvROK(myref))
myref = SvRV(myref);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv("_broadcast",0)));
XPUSHs(sv_2mortal(newRV_inc(myref)));
PUTBACK;
call_pv( "threads::shared::_remote",G_DISCARD );
FREETMPS;
LEAVE;
#----------------------------------------------------------------------
# IN: 1 scalar
# IN: 1 optional scalar
void
bless(SV *myref, ...)
PROTOTYPE: $;$
PREINIT:
HV* stash;
SV* classname;
STRLEN len;
char *ptr;
SV* myref2;
CODE:
if (items == 1) {
stash = CopSTASH(PL_curcop);
} else {
classname = ST(1);
if (classname &&
! SvGMAGICAL(classname) &&
! SvAMAGIC(classname) &&
SvROK(classname))
{
Perl_croak(aTHX_ "Attempt to bless into a reference");
}
ptr = SvPV(classname, len);
if (ckWARN(WARN_MISC) && len == 0) {
Perl_warner(aTHX_ packWARN(WARN_MISC),
"Explicit blessing to '' (assuming package main)");
}
stash = gv_stashpvn(ptr, len, TRUE);
}
SvREFCNT_inc(myref);
(void)sv_bless(myref, stash);
ST(0) = sv_2mortal(myref);
myref2 = SvRV(myref);
if(SvROK(myref2)) {
myref2 = SvRV(myref2);
}
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newRV(myref2)));
XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
PUTBACK;
call_pv( "threads::shared::_bless",G_DISCARD );
FREETMPS;
LEAVE;
#----------------------------------------------------------------------
# IN: 1 any variable (scalar,array,hash,glob)
UV
_id(SV *myref)
PROTOTYPE: \[$@%]
PREINIT:
UV retval;
CODE:
if (!SvROK(myref))
Perl_croak(aTHX_ "Argument to _id needs to be passed as ref");
myref = SvRV(myref);
SvGETMAGIC(myref);
if(SvROK(myref))
myref = SvRV(myref);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newRV_inc(myref)));
PUTBACK;
call_pv( "threads::shared::__id",G_SCALAR );
SPAGAIN;
retval = POPi;
PUTBACK;
FREETMPS;
LEAVE;
RETVAL = retval;
OUTPUT:
RETVAL
#----------------------------------------------------------------------
BOOT:
{
MY_CXT_INIT;
Perl_sharedsv_init(aTHX);
}
|
