[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

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 detached;	/* 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_mutex;  /* protects the creation of threads ??? */

I32 tid_counter = 0;

perl_key self_key;

/*
 *  Clear up after thread is done with
 */
void
Perl_ithread_destruct (pTHX_ ithread* thread)
{
	MUTEX_LOCK(&thread->mutex);
	if (thread->count != 0) {
		MUTEX_UNLOCK(&thread->mutex);
		return;
	}
	MUTEX_LOCK(&create_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;
	    }
	}
	MUTEX_UNLOCK(&create_mutex);
	/* Thread is now disowned */
#if 0
        Perl_warn(aTHX_ "destruct %d @ %p by %p",
	          thread->tid,thread->interp,aTHX);
#endif
	if (thread->interp) {
	    dTHXa(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);
}


/* 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--;
    MUTEX_UNLOCK(&thread->mutex);
    /* This is safe as it re-checks count */
    Perl_ithread_destruct(aTHX_ thread);
    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(&thread->mutex);
	if (thread->detached & 1) {
		MUTEX_UNLOCK(&thread->mutex);
		SvREFCNT_dec(thread->params);
		thread->params = Nullsv;
		Perl_ithread_destruct(aTHX_ thread);
	} else {
		thread->detached |= 4;
	  	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_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->detached = (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);

            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;
	  sigset_t fullmask, oldmask;
	  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
	MUTEX_UNLOCK(&create_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->detached & 1) {
	MUTEX_UNLOCK(&thread->mutex);
	Perl_croak(aTHX_ "Cannot join a detached thread");
    }
    else if (thread->detached & 2) {
	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);
	
	{
	  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;

	}
	/* sv_dup over the args */
	/* We have finished with it */
	thread->detached |= 2;
	MUTEX_UNLOCK(&thread->mutex);
	sv_unmagic(SvRV(obj),PERL_MAGIC_shared_scalar);
	Perl_ithread_destruct(aTHX_ thread);
	return retparam;
    }
    return (AV*)NULL;
}

void
Perl_ithread_detach(pTHX_ ithread *thread)
{
    MUTEX_LOCK(&thread->mutex);
    if (!thread->detached) {
	thread->detached = 1;
#ifdef WIN32
	CloseHandle(thread->handle);
	thread->handle = 0;
#else
	PERL_THREAD_DETACH(thread->thr);
#endif
    }
    MUTEX_UNLOCK(&thread->mutex);
}


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