[p5sagit/p5-mst-13.2.git] / ext / threads / threads.xs

#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#ifdef WIN32
#include <windows.h>
#include <win32thread.h>
#define PERL_THREAD_SETSPECIFIC(k,v) TlsSetValue(k,v)
#define PERL_THREAD_GETSPECIFIC(k,v) v = TlsGetValue(k)
#define PERL_THREAD_ALLOC_SPECIFIC(k) \
STMT_START {\
  if((k = TlsAlloc()) == TLS_OUT_OF_INDEXES) {\
    PerlIO_printf(PerlIO_stderr(),"panic threads.h: TlsAlloc");\
    exit(1);\
  }\
} STMT_END
#else
#include <pthread.h>
#include <thread.h>

#define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v)
#ifdef OLD_PTHREADS_API
#define PERL_THREAD_DETACH(t) pthread_detach(&(t))
#define PERL_THREAD_GETSPECIFIC(k,v) pthread_getspecific(k,&v)
#define PERL_THREAD_ALLOC_SPECIFIC(k) STMT_START {\
  if(pthread_keycreate(&(k),0)) {\
    PerlIO_printf(PerlIO_stderr(), "panic threads.h: pthread_key_create");\
    exit(1);\
  }\
} STMT_END
#else
#define PERL_THREAD_DETACH(t) pthread_detach((t))
#define PERL_THREAD_GETSPECIFIC(k,v) v = pthread_getspecific(k)
#define PERL_THREAD_ALLOC_SPECIFIC(k) STMT_START {\
  if(pthread_key_create(&(k),0)) {\
    PerlIO_printf(PerlIO_stderr(), "panic threads.h: pthread_key_create");\
    exit(1);\
  }\
} STMT_END
#endif
#endif

/* Values for 'state' member */
#define PERL_ITHR_JOINABLE		0
#define PERL_ITHR_DETACHED		1
#define PERL_ITHR_FINISHED		4
#define PERL_ITHR_JOINED		2

typedef struct ithread_s {
    struct ithread_s *next;	/* next thread in the list */
    struct ithread_s *prev;	/* prev thread in the list */
    PerlInterpreter *interp;	/* The threads interpreter */
    I32 tid;              	/* threads module's thread id */
    perl_mutex mutex; 		/* mutex for updating things in this struct */
    I32 count;			/* how many SVs have a reference to us */
    signed char state;		/* are we detached ? */
    int gimme;			/* Context of create */
    SV* init_function;          /* Code to run */
    SV* params;                 /* args to pass function */
#ifdef WIN32
	DWORD	thr;            /* OS's idea if thread id */
	HANDLE handle;          /* OS's waitable handle */
#else
  	pthread_t thr;          /* OS's handle for the thread */
#endif
} ithread;

ithread *threads;

/* Macros to supply the aTHX_ in an embed.h like manner */
#define ithread_join(thread)		Perl_ithread_join(aTHX_ thread)
#define ithread_DESTROY(thread)		Perl_ithread_DESTROY(aTHX_ thread)
#define ithread_CLONE(thread)		Perl_ithread_CLONE(aTHX_ thread)
#define ithread_detach(thread)		Perl_ithread_detach(aTHX_ thread)
#define ithread_tid(thread)		((thread)->tid)

static perl_mutex create_destruct_mutex;  /* protects the creation and destruction of threads*/

I32 tid_counter = 0;
I32 known_threads = 0;
I32 active_threads = 0;
perl_key self_key;

/*
 *  Clear up after thread is done with
 */
void
Perl_ithread_destruct (pTHX_ ithread* thread, const char *why)
{
	MUTEX_LOCK(&thread->mutex);
	if (!thread->next) {
	    Perl_croak(aTHX_ "panic: destruct destroyed thread %p (%s)",thread, why);
	}
	if (thread->count != 0) {
		MUTEX_UNLOCK(&thread->mutex);
		return;
	}
	MUTEX_LOCK(&create_destruct_mutex);
	/* Remove from circular list of threads */
	if (thread->next == thread) {
	    /* last one should never get here ? */
	    threads = NULL;
        }
	else {
	    thread->next->prev = thread->prev->next;
	    thread->prev->next = thread->next->prev;
	    if (threads == thread) {
		threads = thread->next;
	    }
	    thread->next = NULL;
	    thread->prev = NULL;
	}
	known_threads--;
	assert( known_threads >= 0 );
#if 0
        Perl_warn(aTHX_ "destruct %d @ %p by %p now %d",
	          thread->tid,thread->interp,aTHX, known_threads);
#endif
	MUTEX_UNLOCK(&create_destruct_mutex);
	/* Thread is now disowned */
	if (thread->interp) {
	    PERL_SET_CONTEXT(thread->interp);
	    perl_destruct(thread->interp);
	    perl_free(thread->interp);
	    thread->interp = NULL;
	}
	PERL_SET_CONTEXT(aTHX);
	MUTEX_UNLOCK(&thread->mutex);
}

int
Perl_ithread_hook(pTHX)
{
    int veto_cleanup = 0;
    MUTEX_LOCK(&create_destruct_mutex);
    if (aTHX == PL_curinterp && active_threads != 1) {
	Perl_warn(aTHX_ "Cleanup skipped %d active threads", active_threads);
	veto_cleanup = 1;
    }
    MUTEX_UNLOCK(&create_destruct_mutex);
    return veto_cleanup;
}

void
Perl_ithread_detach(pTHX_ ithread *thread)
{
    MUTEX_LOCK(&thread->mutex);
    if (!(thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))) {
	thread->state |= PERL_ITHR_DETACHED;
#ifdef WIN32
	CloseHandle(thread->handle);
	thread->handle = 0;
#else
	PERL_THREAD_DETACH(thread->thr);
#endif
    }
    if ((thread->state & PERL_ITHR_FINISHED) &&
        (thread->state & PERL_ITHR_DETACHED)) {
	MUTEX_UNLOCK(&thread->mutex);
	Perl_ithread_destruct(aTHX_ thread, "detach");
    }
    else {
	MUTEX_UNLOCK(&thread->mutex);
    }
}

/* MAGIC (in mg.h sense) hooks */

int
ithread_mg_get(pTHX_ SV *sv, MAGIC *mg)
{
    ithread *thread = (ithread *) mg->mg_ptr;
    SvIVX(sv) = PTR2IV(thread);
    SvIOK_on(sv);
    return 0;
}

int
ithread_mg_free(pTHX_ SV *sv, MAGIC *mg)
{
    ithread *thread = (ithread *) mg->mg_ptr;
    MUTEX_LOCK(&thread->mutex);
    thread->count--;
    if (thread->count == 0) {
	if (!(thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))) {
	    Perl_warn(aTHX_ "Implicit detach");
	}
	MUTEX_UNLOCK(&thread->mutex);
	Perl_ithread_detach(aTHX_ thread);
    }
    else {
	MUTEX_UNLOCK(&thread->mutex);
    }
    return 0;
}

int
ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
{
    ithread *thread = (ithread *) mg->mg_ptr;
    MUTEX_LOCK(&thread->mutex);
    thread->count++;
    MUTEX_UNLOCK(&thread->mutex);
    return 0;
}

MGVTBL ithread_vtbl = {
 ithread_mg_get,	/* get */
 0,			/* set */
 0,			/* len */
 0,			/* clear */
 ithread_mg_free,	/* free */
 0,			/* copy */
 ithread_mg_dup		/* dup */
};


/*
 *	Starts executing the thread. Needs to clean up memory a tad better.
 *      Passed as the C level function to run in the new thread
 */

#ifdef WIN32
THREAD_RET_TYPE
Perl_ithread_run(LPVOID arg) {
#else
void*
Perl_ithread_run(void * arg) {
#endif
	ithread* thread = (ithread*) arg;
	dTHXa(thread->interp);
	PERL_SET_CONTEXT(thread->interp);
	PERL_THREAD_SETSPECIFIC(self_key,thread);

#if 0
	/* Far from clear messing with ->thr child-side is a good idea */
	MUTEX_LOCK(&thread->mutex);
#ifdef WIN32
	thread->thr = GetCurrentThreadId();
#else
	thread->thr = pthread_self();
#endif
 	MUTEX_UNLOCK(&thread->mutex);
#endif

	PL_perl_destruct_level = 2;

	{
		AV* params = (AV*) SvRV(thread->params);
		I32 len = av_len(params)+1;
		int i;
		dSP;
		ENTER;
		SAVETMPS;
		PUSHMARK(SP);
		for(i = 0; i < len; i++) {
		    XPUSHs(av_shift(params));
		}
		PUTBACK;
		len = call_sv(thread->init_function, thread->gimme|G_EVAL);
		SPAGAIN;
		for (i=len-1; i >= 0; i--) {
		  SV *sv = POPs;
		  av_store(params, i, SvREFCNT_inc(sv));
		}
		PUTBACK;
		if (SvTRUE(ERRSV)) {
		    Perl_warn(aTHX_ "Died:%_",ERRSV);
		}
		FREETMPS;
		LEAVE;
		SvREFCNT_dec(thread->init_function);
	}

	PerlIO_flush((PerlIO*)NULL);
	MUTEX_LOCK(&create_destruct_mutex);
	active_threads--;
	assert( active_threads >= 0 );
	MUTEX_UNLOCK(&create_destruct_mutex);
	MUTEX_LOCK(&thread->mutex);
	thread->state |= PERL_ITHR_FINISHED;

	if (thread->state & PERL_ITHR_DETACHED) {
		MUTEX_UNLOCK(&thread->mutex);
		SvREFCNT_dec(thread->params);
		thread->params = Nullsv;
		Perl_ithread_destruct(aTHX_ thread, "detached finish");
	} else {
		MUTEX_UNLOCK(&thread->mutex);
	}
#ifdef WIN32
	return (DWORD)0;
#else
	return 0;
#endif
}

SV *
ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc)
{
    SV *sv;
    MAGIC *mg;
    if (inc) {
	MUTEX_LOCK(&thread->mutex);
	thread->count++;
	MUTEX_UNLOCK(&thread->mutex);
    }
    if (!obj)
     obj = newSV(0);
    sv = newSVrv(obj,classname);
    sv_setiv(sv,PTR2IV(thread));
    mg = sv_magicext(sv,Nullsv,PERL_MAGIC_shared_scalar,&ithread_vtbl,(char *)thread,0);
    mg->mg_flags |= MGf_DUP;
    SvREADONLY_on(sv);
    return obj;
}

ithread *
SV_to_ithread(pTHX_ SV *sv)
{
    ithread *thread;
    if (SvROK(sv))
     {
      thread = INT2PTR(ithread*, SvIV(SvRV(sv)));
     }
    else
     {
      PERL_THREAD_GETSPECIFIC(self_key,thread);
     }
    return thread;
}

/*
 * iThread->create(); ( aka iThread->new() )
 * Called in context of parent thread
 */

SV *
Perl_ithread_create(pTHX_ SV *obj, char* classname, SV* init_function, SV* params)
{
	ithread*	thread;
	CLONE_PARAMS	clone_param;

	MUTEX_LOCK(&create_destruct_mutex);
	thread = PerlMemShared_malloc(sizeof(ithread));
	Zero(thread,1,ithread);
	thread->next = threads;
	thread->prev = threads->prev;
	thread->prev->next = thread;
	/* Set count to 1 immediately in case thread exits before
	 * we return to caller !
	 */
	thread->count = 1;
	MUTEX_INIT(&thread->mutex);
	thread->tid = tid_counter++;
	thread->gimme = GIMME_V;
	thread->state = (thread->gimme == G_VOID) ? 1 : 0;

	/* "Clone" our interpreter into the thread's interpreter
	 * This gives thread access to "static data" and code.
	 */

	PerlIO_flush((PerlIO*)NULL);

#ifdef WIN32
	thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST);
#else
	thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE);
#endif
	/* perl_clone leaves us in new interpreter's context.
	   As it is tricky to spot implcit aTHX create a new scope
	   with aTHX matching the context for the duration of
	   our work for new interpreter.
	 */
	{
	    dTHXa(thread->interp);
            /* Here we remove END blocks since they should only run
	       in the thread they are created
            */
            SvREFCNT_dec(PL_endav);
            PL_endav = newAV();
            clone_param.flags = 0;
	    thread->init_function = sv_dup(init_function, &clone_param);
	    if (SvREFCNT(thread->init_function) == 0) {
		SvREFCNT_inc(thread->init_function);
	    }

	    thread->params = sv_dup(params, &clone_param);
	    SvREFCNT_inc(thread->params);
	    SvTEMP_off(thread->init_function);
	    ptr_table_free(PL_ptr_table);
	    PL_ptr_table = NULL;
	}

	PERL_SET_CONTEXT(aTHX);

	/* Start the thread */

#ifdef WIN32

	thread->handle = CreateThread(NULL, 0, Perl_ithread_run,
			(LPVOID)thread, 0, &thread->thr);

#else
	{
	  static pthread_attr_t attr;
	  static int attr_inited = 0;
	  static int attr_joinable = PTHREAD_CREATE_JOINABLE;
	  if (!attr_inited) {
	    attr_inited = 1;
	    pthread_attr_init(&attr);
	  }
#  ifdef PTHREAD_ATTR_SETDETACHSTATE
            PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
#  endif
#  ifdef THREAD_CREATE_NEEDS_STACK
	    if(pthread_attr_setstacksize(&attr, THREAD_CREATE_NEEDS_STACK))
	      croak("panic: pthread_attr_setstacksize failed");
#  endif

#ifdef OLD_PTHREADS_API
	  pthread_create( &thread->thr, attr, Perl_ithread_run, (void *)thread);
#else
	  pthread_create( &thread->thr, &attr, Perl_ithread_run, (void *)thread);
#endif
	}
#endif
	known_threads++;
	active_threads++;
	MUTEX_UNLOCK(&create_destruct_mutex);
	return ithread_to_SV(aTHX_ obj, thread, classname, FALSE);
}

SV*
Perl_ithread_self (pTHX_ SV *obj, char* Class)
{
    ithread *thread;
    PERL_THREAD_GETSPECIFIC(self_key,thread);
    return ithread_to_SV(aTHX_ obj, thread, Class, TRUE);
}

/*
 * Joins the thread this code needs to take the returnvalue from the
 * call_sv and send it back
 */

void
Perl_ithread_CLONE(pTHX_ SV *obj)
{
 if (SvROK(obj))
  {
   ithread *thread = SV_to_ithread(aTHX_ obj);
  }
 else
  {
   Perl_warn(aTHX_ "CLONE %_",obj);
  }
}

AV*
Perl_ithread_join(pTHX_ SV *obj)
{
    ithread *thread = SV_to_ithread(aTHX_ obj);
    MUTEX_LOCK(&thread->mutex);
    if (thread->state & PERL_ITHR_DETACHED) {
	MUTEX_UNLOCK(&thread->mutex);
	Perl_croak(aTHX_ "Cannot join a detached thread");
    }
    else if (thread->state & PERL_ITHR_JOINED) {
	MUTEX_UNLOCK(&thread->mutex);
	Perl_croak(aTHX_ "Thread already joined");
    }
    else {
        AV* retparam;
#ifdef WIN32
	DWORD waitcode;
#else
	void *retval;
#endif
	MUTEX_UNLOCK(&thread->mutex);
#ifdef WIN32
	waitcode = WaitForSingleObject(thread->handle, INFINITE);
#else
	pthread_join(thread->thr,&retval);
#endif
	MUTEX_LOCK(&thread->mutex);
	
	/* sv_dup over the args */
	{
	  AV* params = (AV*) SvRV(thread->params);	
	  CLONE_PARAMS clone_params;
	  clone_params.stashes = newAV();
	  PL_ptr_table = ptr_table_new();
	  retparam = (AV*) sv_dup((SV*)params, &clone_params);
	  SvREFCNT_dec(clone_params.stashes);
	  SvREFCNT_inc(retparam);
	  ptr_table_free(PL_ptr_table);
	  PL_ptr_table = NULL;

	}
	/* We have finished with it */
	thread->state |= PERL_ITHR_JOINED;
	MUTEX_UNLOCK(&thread->mutex);
	sv_unmagic(SvRV(obj),PERL_MAGIC_shared_scalar);
	Perl_ithread_destruct(aTHX_ thread, "joined");
	return retparam;
    }
    return (AV*)NULL;
}

void
Perl_ithread_DESTROY(pTHX_ SV *sv)
{
    ithread *thread = SV_to_ithread(aTHX_ sv);
    sv_unmagic(SvRV(sv),PERL_MAGIC_shared_scalar);
}


MODULE = threads		PACKAGE = threads	PREFIX = ithread_
PROTOTYPES: DISABLE

void
ithread_new (classname, function_to_call, ...)
char *	classname
SV *	function_to_call
CODE:
{
    AV* params = newAV();
    if (items > 2) {
	int i;
	for(i = 2; i < items ; i++) {
	    av_push(params, ST(i));
	}
    }
    ST(0) = sv_2mortal(Perl_ithread_create(aTHX_ Nullsv, classname, function_to_call, newRV_noinc((SV*) params)));
    XSRETURN(1);
}

void
ithread_self(char *classname)
CODE:
{
	ST(0) = sv_2mortal(Perl_ithread_self(aTHX_ Nullsv,classname));
	XSRETURN(1);
}

int
ithread_tid(ithread *thread)

void
ithread_join(SV *obj)
PPCODE:
{
  AV* params = Perl_ithread_join(aTHX_ obj);
  int i;
  I32 len = AvFILL(params);
  for (i = 0; i <= len; i++) {
    XPUSHs(av_shift(params));
  }
  SvREFCNT_dec(params);
}


void
ithread_detach(ithread *thread)

void
ithread_DESTROY(SV *thread)

BOOT:
{
	ithread* thread;
	PL_perl_destruct_level = 2;
	PERL_THREAD_ALLOC_SPECIFIC(self_key);
	MUTEX_INIT(&create_destruct_mutex);
	MUTEX_LOCK(&create_destruct_mutex);
	PL_threadhook = &Perl_ithread_hook;
	thread  = PerlMemShared_malloc(sizeof(ithread));
	Zero(thread,1,ithread);
	PL_perl_destruct_level = 2;
	MUTEX_INIT(&thread->mutex);
	threads = thread;
	thread->next = thread;
        thread->prev = thread;
	thread->interp = aTHX;
	thread->count  = 1;  /* imortal */
	thread->tid = tid_counter++;
	known_threads++;
	active_threads++;
	thread->state = 1;
#ifdef WIN32
	thread->thr = GetCurrentThreadId();
#else
	thread->thr = pthread_self();
#endif

	PERL_THREAD_SETSPECIFIC(self_key,thread);
	MUTEX_UNLOCK(&create_destruct_mutex);
}
Commit	Line	Data
68795e93	1	#define PERL_NO_GET_CONTEXT
	2	#include "EXTERN.h"
	3	#include "perl.h"
	4	#include "XSUB.h"
	5
	6	#ifdef WIN32
	7	#include <windows.h>
	8	#include <win32thread.h>
	9	#define PERL_THREAD_SETSPECIFIC(k,v) TlsSetValue(k,v)
	10	#define PERL_THREAD_GETSPECIFIC(k,v) v = TlsGetValue(k)
	11	#define PERL_THREAD_ALLOC_SPECIFIC(k) \
	12	STMT_START {\
	13	if((k = TlsAlloc()) == TLS_OUT_OF_INDEXES) {\
	14	PerlIO_printf(PerlIO_stderr(),"panic threads.h: TlsAlloc");\
	15	exit(1);\
	16	}\
	17	} STMT_END
	18	#else
	19	#include <pthread.h>
	20	#include <thread.h>
	21
	22	#define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v)
	23	#ifdef OLD_PTHREADS_API
	24	#define PERL_THREAD_DETACH(t) pthread_detach(&(t))
	25	#define PERL_THREAD_GETSPECIFIC(k,v) pthread_getspecific(k,&v)
	26	#define PERL_THREAD_ALLOC_SPECIFIC(k) STMT_START {\
	27	if(pthread_keycreate(&(k),0)) {\
	28	PerlIO_printf(PerlIO_stderr(), "panic threads.h: pthread_key_create");\
	29	exit(1);\
	30	}\
	31	} STMT_END
	32	#else
	33	#define PERL_THREAD_DETACH(t) pthread_detach((t))
	34	#define PERL_THREAD_GETSPECIFIC(k,v) v = pthread_getspecific(k)
	35	#define PERL_THREAD_ALLOC_SPECIFIC(k) STMT_START {\
	36	if(pthread_key_create(&(k),0)) {\
	37	PerlIO_printf(PerlIO_stderr(), "panic threads.h: pthread_key_create");\
	38	exit(1);\
	39	}\
	40	} STMT_END
	41	#endif
	42	#endif
	43
62375a60	44	/* Values for 'state' member */
	45	#define PERL_ITHR_JOINABLE 0
	46	#define PERL_ITHR_DETACHED 1
	47	#define PERL_ITHR_FINISHED 4
	48	#define PERL_ITHR_JOINED 2
	49
68795e93	50	typedef struct ithread_s {
	51	struct ithread_s next; / next thread in the list */
	52	struct ithread_s prev; / prev thread in the list */
	53	PerlInterpreter interp; / The threads interpreter */
	54	I32 tid; /* threads module's thread id */
	55	perl_mutex mutex; /* mutex for updating things in this struct */
	56	I32 count; /* how many SVs have a reference to us */
62375a60	57	signed char state; /* are we detached ? */
a446a88f	58	int gimme; /* Context of create */
68795e93	59	SV* init_function; /* Code to run */
	60	SV* params; /* args to pass function */
	61	#ifdef WIN32
	62	DWORD thr; /* OS's idea if thread id */
	63	HANDLE handle; /* OS's waitable handle */
	64	#else
	65	pthread_t thr; /* OS's handle for the thread */
	66	#endif
	67	} ithread;
	68
	69	ithread *threads;
	70
	71	/* Macros to supply the aTHX_ in an embed.h like manner */
	72	#define ithread_join(thread) Perl_ithread_join(aTHX_ thread)
	73	#define ithread_DESTROY(thread) Perl_ithread_DESTROY(aTHX_ thread)
	74	#define ithread_CLONE(thread) Perl_ithread_CLONE(aTHX_ thread)
	75	#define ithread_detach(thread) Perl_ithread_detach(aTHX_ thread)
	76	#define ithread_tid(thread) ((thread)->tid)
	77
58c2ef19	78	static perl_mutex create_destruct_mutex; /* protects the creation and destruction of threads*/
68795e93	79
68795e93	80	I32 tid_counter = 0;
62375a60	81	I32 known_threads = 0;
58c2ef19	82	I32 active_threads = 0;
68795e93	83	perl_key self_key;
	84
	85	/*
	86	* Clear up after thread is done with
	87	*/
	88	void
62375a60	89	Perl_ithread_destruct (pTHX_ ithread* thread, const char *why)
68795e93	90	{
68795e93	91	MUTEX_LOCK(&thread->mutex);
62375a60	92	if (!thread->next) {
	93	Perl_croak(aTHX_ "panic: destruct destroyed thread %p (%s)",thread, why);
	94	}
68795e93	95	if (thread->count != 0) {
68795e93	96	MUTEX_UNLOCK(&thread->mutex);
d1400e48	97	return;
68795e93	98	}
58c2ef19	99	MUTEX_LOCK(&create_destruct_mutex);
68795e93	100	/* Remove from circular list of threads */
	101	if (thread->next == thread) {
	102	/* last one should never get here ? */
	103	threads = NULL;
	104	}
	105	else {
	106	thread->next->prev = thread->prev->next;
	107	thread->prev->next = thread->next->prev;
	108	if (threads == thread) {
	109	threads = thread->next;
	110	}
62375a60	111	thread->next = NULL;
62375a60	112	thread->prev = NULL;
68795e93	113	}
62375a60	114	known_threads--;
62375a60	115	assert( known_threads >= 0 );
ba14dd9a	116	#if 0
62375a60	117	Perl_warn(aTHX_ "destruct %d @ %p by %p now %d",
62375a60	118	thread->tid,thread->interp,aTHX, known_threads);
ba14dd9a	119	#endif
62375a60	120	MUTEX_UNLOCK(&create_destruct_mutex);
62375a60	121	/* Thread is now disowned */
68795e93	122	if (thread->interp) {
68795e93	123	PERL_SET_CONTEXT(thread->interp);
	124	perl_destruct(thread->interp);
	125	perl_free(thread->interp);
	126	thread->interp = NULL;
	127	}
	128	PERL_SET_CONTEXT(aTHX);
d1400e48	129	MUTEX_UNLOCK(&thread->mutex);
68795e93	130	}
68795e93	131
62375a60	132	int
	133	Perl_ithread_hook(pTHX)
	134	{
	135	int veto_cleanup = 0;
	136	MUTEX_LOCK(&create_destruct_mutex);
	137	if (aTHX == PL_curinterp && active_threads != 1) {
	138	Perl_warn(aTHX_ "Cleanup skipped %d active threads", active_threads);
	139	veto_cleanup = 1;
	140	}
	141	MUTEX_UNLOCK(&create_destruct_mutex);
	142	return veto_cleanup;
	143	}
	144
	145	void
	146	Perl_ithread_detach(pTHX_ ithread *thread)
	147	{
	148	MUTEX_LOCK(&thread->mutex);
	149	if (!(thread->state & (PERL_ITHR_DETACHED\|PERL_ITHR_JOINED))) {
	150	thread->state \|= PERL_ITHR_DETACHED;
	151	#ifdef WIN32
	152	CloseHandle(thread->handle);
	153	thread->handle = 0;
	154	#else
	155	PERL_THREAD_DETACH(thread->thr);
	156	#endif
	157	}
	158	if ((thread->state & PERL_ITHR_FINISHED) &&
	159	(thread->state & PERL_ITHR_DETACHED)) {
	160	MUTEX_UNLOCK(&thread->mutex);
	161	Perl_ithread_destruct(aTHX_ thread, "detach");
	162	}
	163	else {
	164	MUTEX_UNLOCK(&thread->mutex);
	165	}
	166	}
68795e93	167
	168	/* MAGIC (in mg.h sense) hooks */
	169
	170	int
	171	ithread_mg_get(pTHX_ SV sv, MAGIC mg)
	172	{
	173	ithread thread = (ithread ) mg->mg_ptr;
	174	SvIVX(sv) = PTR2IV(thread);
	175	SvIOK_on(sv);
	176	return 0;
	177	}
	178
	179	int
	180	ithread_mg_free(pTHX_ SV sv, MAGIC mg)
	181	{
	182	ithread thread = (ithread ) mg->mg_ptr;
	183	MUTEX_LOCK(&thread->mutex);
68795e93	184	thread->count--;
62375a60	185	if (thread->count == 0) {
	186	if (!(thread->state & (PERL_ITHR_DETACHED\|PERL_ITHR_JOINED))) {
	187	Perl_warn(aTHX_ "Implicit detach");
	188	}
	189	MUTEX_UNLOCK(&thread->mutex);
	190	Perl_ithread_detach(aTHX_ thread);
	191	}
	192	else {
	193	MUTEX_UNLOCK(&thread->mutex);
	194	}
68795e93	195	return 0;
	196	}
	197
	198	int
	199	ithread_mg_dup(pTHX_ MAGIC mg, CLONE_PARAMS param)
	200	{
	201	ithread thread = (ithread ) mg->mg_ptr;
	202	MUTEX_LOCK(&thread->mutex);
68795e93	203	thread->count++;
	204	MUTEX_UNLOCK(&thread->mutex);
	205	return 0;
	206	}
	207
	208	MGVTBL ithread_vtbl = {
	209	ithread_mg_get, /* get */
	210	0, /* set */
	211	0, /* len */
	212	0, /* clear */
	213	ithread_mg_free, /* free */
	214	0, /* copy */
	215	ithread_mg_dup /* dup */
	216	};
	217
47ba8780	218
47ba8780	219	/*
b1edfb69	220	* Starts executing the thread. Needs to clean up memory a tad better.
68795e93	221	* Passed as the C level function to run in the new thread
b1edfb69	222	*/
47ba8780	223
47ba8780	224	#ifdef WIN32
68795e93	225	THREAD_RET_TYPE
68795e93	226	Perl_ithread_run(LPVOID arg) {
47ba8780	227	#else
68795e93	228	void*
68795e93	229	Perl_ithread_run(void * arg) {
47ba8780	230	#endif
5b414d21	231	ithread* thread = (ithread*) arg;
47ba8780	232	dTHXa(thread->interp);
47ba8780	233	PERL_SET_CONTEXT(thread->interp);
68795e93	234	PERL_THREAD_SETSPECIFIC(self_key,thread);
47ba8780	235
68795e93	236	#if 0
	237	/* Far from clear messing with ->thr child-side is a good idea */
	238	MUTEX_LOCK(&thread->mutex);
47ba8780	239	#ifdef WIN32
	240	thread->thr = GetCurrentThreadId();
	241	#else
	242	thread->thr = pthread_self();
	243	#endif
68795e93	244	MUTEX_UNLOCK(&thread->mutex);
68795e93	245	#endif
47ba8780	246
47ba8780	247	PL_perl_destruct_level = 2;
4f896ddc	248
47ba8780	249	{
68795e93	250	AV* params = (AV*) SvRV(thread->params);
68795e93	251	I32 len = av_len(params)+1;
47ba8780	252	int i;
47ba8780	253	dSP;
47ba8780	254	ENTER;
	255	SAVETMPS;
	256	PUSHMARK(SP);
68795e93	257	for(i = 0; i < len; i++) {
68795e93	258	XPUSHs(av_shift(params));
47ba8780	259	}
47ba8780	260	PUTBACK;
a446a88f	261	len = call_sv(thread->init_function, thread->gimme\|G_EVAL);
68795e93	262	SPAGAIN;
a446a88f	263	for (i=len-1; i >= 0; i--) {
e1c44605	264	SV *sv = POPs;
e1c44605	265	av_store(params, i, SvREFCNT_inc(sv));
a446a88f	266	}
	267	PUTBACK;
	268	if (SvTRUE(ERRSV)) {
	269	Perl_warn(aTHX_ "Died:%_",ERRSV);
	270	}
47ba8780	271	FREETMPS;
47ba8780	272	LEAVE;
68795e93	273	SvREFCNT_dec(thread->init_function);
47ba8780	274	}
47ba8780	275
fd58862f	276	PerlIO_flush((PerlIO*)NULL);
62375a60	277	MUTEX_LOCK(&create_destruct_mutex);
	278	active_threads--;
	279	assert( active_threads >= 0 );
	280	MUTEX_UNLOCK(&create_destruct_mutex);
68795e93	281	MUTEX_LOCK(&thread->mutex);
62375a60	282	thread->state \|= PERL_ITHR_FINISHED;
	283
	284	if (thread->state & PERL_ITHR_DETACHED) {
47ba8780	285	MUTEX_UNLOCK(&thread->mutex);
a446a88f	286	SvREFCNT_dec(thread->params);
a446a88f	287	thread->params = Nullsv;
62375a60	288	Perl_ithread_destruct(aTHX_ thread, "detached finish");
47ba8780	289	} else {
62375a60	290	MUTEX_UNLOCK(&thread->mutex);
62375a60	291	}
47ba8780	292	#ifdef WIN32
47ba8780	293	return (DWORD)0;
e8f2bb9a	294	#else
e8f2bb9a	295	return 0;
47ba8780	296	#endif
68795e93	297	}
	298
	299	SV *
	300	ithread_to_SV(pTHX_ SV obj, ithread thread, char *classname, bool inc)
	301	{
	302	SV *sv;
	303	MAGIC *mg;
	304	if (inc) {
	305	MUTEX_LOCK(&thread->mutex);
	306	thread->count++;
68795e93	307	MUTEX_UNLOCK(&thread->mutex);
	308	}
	309	if (!obj)
	310	obj = newSV(0);
	311	sv = newSVrv(obj,classname);
	312	sv_setiv(sv,PTR2IV(thread));
	313	mg = sv_magicext(sv,Nullsv,PERL_MAGIC_shared_scalar,&ithread_vtbl,(char *)thread,0);
	314	mg->mg_flags \|= MGf_DUP;
	315	SvREADONLY_on(sv);
	316	return obj;
	317	}
47ba8780	318
68795e93	319	ithread *
	320	SV_to_ithread(pTHX_ SV *sv)
	321	{
	322	ithread *thread;
	323	if (SvROK(sv))
	324	{
	325	thread = INT2PTR(ithread*, SvIV(SvRV(sv)));
	326	}
	327	else
	328	{
	329	PERL_THREAD_GETSPECIFIC(self_key,thread);
	330	}
	331	return thread;
47ba8780	332	}
47ba8780	333
47ba8780	334	/*
68795e93	335	* iThread->create(); ( aka iThread->new() )
68795e93	336	* Called in context of parent thread
b1edfb69	337	*/
47ba8780	338
68795e93	339	SV *
	340	Perl_ithread_create(pTHX_ SV obj, char classname, SV* init_function, SV* params)
	341	{
	342	ithread* thread;
	343	CLONE_PARAMS clone_param;
	344
58c2ef19	345	MUTEX_LOCK(&create_destruct_mutex);
68795e93	346	thread = PerlMemShared_malloc(sizeof(ithread));
	347	Zero(thread,1,ithread);
	348	thread->next = threads;
	349	thread->prev = threads->prev;
	350	thread->prev->next = thread;
	351	/* Set count to 1 immediately in case thread exits before
	352	* we return to caller !
	353	*/
	354	thread->count = 1;
	355	MUTEX_INIT(&thread->mutex);
	356	thread->tid = tid_counter++;
a446a88f	357	thread->gimme = GIMME_V;
62375a60	358	thread->state = (thread->gimme == G_VOID) ? 1 : 0;
4f896ddc	359
68795e93	360	/* "Clone" our interpreter into the thread's interpreter
	361	* This gives thread access to "static data" and code.
	362	*/
47ba8780	363
68795e93	364	PerlIO_flush((PerlIO*)NULL);
cd8c9bf8	365
47ba8780	366	#ifdef WIN32
68795e93	367	thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE \| CLONEf_CLONE_HOST);
47ba8780	368	#else
68795e93	369	thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE);
47ba8780	370	#endif
ba14dd9a	371	/* perl_clone leaves us in new interpreter's context.
ba14dd9a	372	As it is tricky to spot implcit aTHX create a new scope
a446a88f	373	with aTHX matching the context for the duration of
ba14dd9a	374	our work for new interpreter.
	375	*/
	376	{
	377	dTHXa(thread->interp);
58c2ef19	378	/* Here we remove END blocks since they should only run
62375a60	379	in the thread they are created
58c2ef19	380	*/
	381	SvREFCNT_dec(PL_endav);
	382	PL_endav = newAV();
d1400e48	383	clone_param.flags = 0;
ba14dd9a	384	thread->init_function = sv_dup(init_function, &clone_param);
	385	if (SvREFCNT(thread->init_function) == 0) {
	386	SvREFCNT_inc(thread->init_function);
d1400e48	387	}
ba14dd9a	388
	389	thread->params = sv_dup(params, &clone_param);
	390	SvREFCNT_inc(thread->params);
	391	SvTEMP_off(thread->init_function);
	392	ptr_table_free(PL_ptr_table);
	393	PL_ptr_table = NULL;
	394	}
d1400e48	395
68795e93	396	PERL_SET_CONTEXT(aTHX);
47ba8780	397
68795e93	398	/* Start the thread */
47ba8780	399
	400	#ifdef WIN32
	401
68795e93	402	thread->handle = CreateThread(NULL, 0, Perl_ithread_run,
47ba8780	403	(LPVOID)thread, 0, &thread->thr);
47ba8780	404
82c40bf6	405	#else
fa26028c	406	{
	407	static pthread_attr_t attr;
	408	static int attr_inited = 0;
fa26028c	409	static int attr_joinable = PTHREAD_CREATE_JOINABLE;
	410	if (!attr_inited) {
	411	attr_inited = 1;
	412	pthread_attr_init(&attr);
	413	}
	414	# ifdef PTHREAD_ATTR_SETDETACHSTATE
	415	PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
	416	# endif
3eb37d38	417	# ifdef THREAD_CREATE_NEEDS_STACK
	418	if(pthread_attr_setstacksize(&attr, THREAD_CREATE_NEEDS_STACK))
	419	croak("panic: pthread_attr_setstacksize failed");
	420	# endif
	421
3ad0b7d6	422	#ifdef OLD_PTHREADS_API
68795e93	423	pthread_create( &thread->thr, attr, Perl_ithread_run, (void *)thread);
47ba8780	424	#else
68795e93	425	pthread_create( &thread->thr, &attr, Perl_ithread_run, (void *)thread);
47ba8780	426	#endif
3ad0b7d6	427	}
82c40bf6	428	#endif
62375a60	429	known_threads++;
58c2ef19	430	active_threads++;
58c2ef19	431	MUTEX_UNLOCK(&create_destruct_mutex);
68795e93	432	return ithread_to_SV(aTHX_ obj, thread, classname, FALSE);
68795e93	433	}
47ba8780	434
68795e93	435	SV*
	436	Perl_ithread_self (pTHX_ SV obj, char Class)
	437	{
	438	ithread *thread;
	439	PERL_THREAD_GETSPECIFIC(self_key,thread);
	440	return ithread_to_SV(aTHX_ obj, thread, Class, TRUE);
47ba8780	441	}
	442
	443	/*
e1c44605	444	* Joins the thread this code needs to take the returnvalue from the
68795e93	445	* call_sv and send it back
b1edfb69	446	*/
47ba8780	447
68795e93	448	void
	449	Perl_ithread_CLONE(pTHX_ SV *obj)
	450	{
	451	if (SvROK(obj))
	452	{
	453	ithread *thread = SV_to_ithread(aTHX_ obj);
	454	}
	455	else
	456	{
	457	Perl_warn(aTHX_ "CLONE %_",obj);
	458	}
47ba8780	459	}
47ba8780	460
62375a60	461	AV*
68795e93	462	Perl_ithread_join(pTHX_ SV *obj)
	463	{
	464	ithread *thread = SV_to_ithread(aTHX_ obj);
	465	MUTEX_LOCK(&thread->mutex);
62375a60	466	if (thread->state & PERL_ITHR_DETACHED) {
a446a88f	467	MUTEX_UNLOCK(&thread->mutex);
	468	Perl_croak(aTHX_ "Cannot join a detached thread");
	469	}
62375a60	470	else if (thread->state & PERL_ITHR_JOINED) {
a446a88f	471	MUTEX_UNLOCK(&thread->mutex);
	472	Perl_croak(aTHX_ "Thread already joined");
	473	}
	474	else {
e1c44605	475	AV* retparam;
47ba8780	476	#ifdef WIN32
47ba8780	477	DWORD waitcode;
47ba8780	478	#else
47ba8780	479	void *retval;
47ba8780	480	#endif
47ba8780	481	MUTEX_UNLOCK(&thread->mutex);
68795e93	482	#ifdef WIN32
	483	waitcode = WaitForSingleObject(thread->handle, INFINITE);
	484	#else
	485	pthread_join(thread->thr,&retval);
	486	#endif
47ba8780	487	MUTEX_LOCK(&thread->mutex);
e1c44605	488
62375a60	489	/* sv_dup over the args */
e1c44605	490	{
62375a60	491	AV* params = (AV*) SvRV(thread->params);
e1c44605	492	CLONE_PARAMS clone_params;
3275ba96	493	clone_params.stashes = newAV();
e1c44605	494	PL_ptr_table = ptr_table_new();
e1c44605	495	retparam = (AV) sv_dup((SV)params, &clone_params);
3275ba96	496	SvREFCNT_dec(clone_params.stashes);
e1c44605	497	SvREFCNT_inc(retparam);
	498	ptr_table_free(PL_ptr_table);
	499	PL_ptr_table = NULL;
	500
	501	}
a446a88f	502	/* We have finished with it */
62375a60	503	thread->state \|= PERL_ITHR_JOINED;
47ba8780	504	MUTEX_UNLOCK(&thread->mutex);
68795e93	505	sv_unmagic(SvRV(obj),PERL_MAGIC_shared_scalar);
62375a60	506	Perl_ithread_destruct(aTHX_ thread, "joined");
e1c44605	507	return retparam;
68795e93	508	}
e1c44605	509	return (AV*)NULL;
47ba8780	510	}
47ba8780	511
68795e93	512	void
68795e93	513	Perl_ithread_DESTROY(pTHX_ SV *sv)
	514	{
	515	ithread *thread = SV_to_ithread(aTHX_ sv);
68795e93	516	sv_unmagic(SvRV(sv),PERL_MAGIC_shared_scalar);
68795e93	517	}
8222d950	518
e1c44605	519
e1c44605	520
68795e93	521	MODULE = threads PACKAGE = threads PREFIX = ithread_
68795e93	522	PROTOTYPES: DISABLE
8222d950	523
68795e93	524	void
	525	ithread_new (classname, function_to_call, ...)
	526	char * classname
	527	SV * function_to_call
	528	CODE:
	529	{
	530	AV* params = newAV();
	531	if (items > 2) {
	532	int i;
	533	for(i = 2; i < items ; i++) {
	534	av_push(params, ST(i));
	535	}
	536	}
	537	ST(0) = sv_2mortal(Perl_ithread_create(aTHX_ Nullsv, classname, function_to_call, newRV_noinc((SV*) params)));
	538	XSRETURN(1);
	539	}
8222d950	540
68795e93	541	void
	542	ithread_self(char *classname)
	543	CODE:
	544	{
	545	ST(0) = sv_2mortal(Perl_ithread_self(aTHX_ Nullsv,classname));
	546	XSRETURN(1);
	547	}
47ba8780	548
47ba8780	549	int
68795e93	550	ithread_tid(ithread *thread)
47ba8780	551
47ba8780	552	void
68795e93	553	ithread_join(SV *obj)
e1c44605	554	PPCODE:
	555	{
	556	AV* params = Perl_ithread_join(aTHX_ obj);
	557	int i;
	558	I32 len = AvFILL(params);
	559	for (i = 0; i <= len; i++) {
	560	XPUSHs(av_shift(params));
	561	}
	562	SvREFCNT_dec(params);
	563	}
	564
47ba8780	565
47ba8780	566	void
68795e93	567	ithread_detach(ithread *thread)
47ba8780	568
47ba8780	569	void
68795e93	570	ithread_DESTROY(SV *thread)
68795e93	571
68795e93	572	BOOT:
	573	{
	574	ithread* thread;
e1c44605	575	PL_perl_destruct_level = 2;
68795e93	576	PERL_THREAD_ALLOC_SPECIFIC(self_key);
58c2ef19	577	MUTEX_INIT(&create_destruct_mutex);
58c2ef19	578	MUTEX_LOCK(&create_destruct_mutex);
62375a60	579	PL_threadhook = &Perl_ithread_hook;
68795e93	580	thread = PerlMemShared_malloc(sizeof(ithread));
	581	Zero(thread,1,ithread);
	582	PL_perl_destruct_level = 2;
	583	MUTEX_INIT(&thread->mutex);
	584	threads = thread;
	585	thread->next = thread;
	586	thread->prev = thread;
	587	thread->interp = aTHX;
	588	thread->count = 1; /* imortal */
	589	thread->tid = tid_counter++;
62375a60	590	known_threads++;
58c2ef19	591	active_threads++;
62375a60	592	thread->state = 1;
68795e93	593	#ifdef WIN32
	594	thread->thr = GetCurrentThreadId();
	595	#else
	596	thread->thr = pthread_self();
	597	#endif
62375a60	598
68795e93	599	PERL_THREAD_SETSPECIFIC(self_key,thread);
58c2ef19	600	MUTEX_UNLOCK(&create_destruct_mutex);
68795e93	601	}
68795e93	602