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Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.178 by root, Wed Oct 3 01:48:06 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
63		92
64	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
66	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74		111
75	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
79	#else	116	#else
80	# define LOCK (void)0	117	# define LOCK (void)0
81	# define UNLOCK (void)0	118	# define UNLOCK (void)0
82	#endif	119	#endif
83		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
88		136
89	/* this is actually not just the c stack but also c registers etc... */	137	static GV *irsgv; /* $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
		155
		156	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	157	typedef struct coro_cctx {
91	struct coro_stack *next;	158	struct coro_cctx *next;
92		159
93	void *idle_sp;	160	/* the stack */
94	void *sptr;	161	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
96		163
97	/* cpu state */	164	/* cpu state */
		165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		167	JMPENV *top_env;
98	coro_context cctx;	168	coro_context cctx;
99	} coro_stack;
100		169
101	static coro_stack *main_stack;	170	#if CORO_USE_VALGRIND
		171	int valgrind_id;
		172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
102		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
		182
		183	/* this is a structure representing a perl-level coroutine */
103	struct coro {	184	struct coro {
104	/* optionally saved, might be zero */	185	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	186	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		187
150	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
151	AV *args;	189	AV *args;
152	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
		192
		193	/* optionally saved, might be zero */
		194	AV *defav; /* @_ */
		195	SV *defsv; /* $_ */
		196	SV *errsv; /* $@ */
		197	IO *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
		200
		201	#define VAR(name,type) type name;
		202	# include "state.h"
		203	#undef VAR
		204
		205	/* statistics */
		206	int usecount; /* number of switches to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210
		211	/* linked list */
		212	struct coro *next, *prev;
		213	HV *hv; /* the perl hash associated with this coro, if any */
153	};	214	};
154		215
155	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
157		218
		219	/** Coro ********************************************************************/
		220
		221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/** lowlevel stuff **********************************************************/
		235
158	static AV *	236	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
160	{	238	{
161	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	240	AV *newpadlist, *newpad;
163		241
164	newpadlist = newAV ();	242	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	243	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	244	#if PERL_VERSION_ATLEAST (5,9,0)
		245	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		246	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	247	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	248	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	249	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	250	--AvFILLp (padlist);
173		251
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	252	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		296
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	297	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		298
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		300
		301	#define CORO_MAGIC(cv) \
		302	SvMAGIC (cv) \
		303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		304	? SvMAGIC (cv) \
		305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		306	: 0
		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
223	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
224	static void	335	static void
225	get_padlist (pTHX_ CV *cv)	336	get_padlist (pTHX_ CV *cv)
226	{	337	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
228		340
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	343	else
232	{	344	{
233	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	346	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	347	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
239	#else	351	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	355	}
244		356
245	static void	357	static void
246	put_padlist (pTHX_ CV *cv)	358	put_padlist (pTHX_ CV *cv)
247	{	359	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	360	MAGIC *mg = CORO_MAGIC (cv);
		361	AV *av;
249		362
250	if (!mg)	363	if (!mg)
251	{	364	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	367	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	368	mg->mg_obj = (SV *)newAV ();
256	}	369	}
257		370
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	371	av = (AV *)mg->mg_obj;
259	}
260		372
261	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
262	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
263		375
264	#define LOAD(state) load_state(aTHX_ (state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	377	}
266		378
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	379	/** load & save, init *******************************************************/
268		380
269	static void	381	static void
270	load_state(pTHX_ Coro__State c)	382	load_perl (pTHX_ Coro__State c)
271	{	383	{
272	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
274		387
275	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
276	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
277	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
278	PL_stack_sp = c->stack_sp;	391	GvIOp(PL_defoutgv) = c->deffh;
279	PL_op = c->op;	392	PL_rs = c->irssv;
280	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
310		394
311	{	395	{
312	dSP;	396	dSP;
313	CV *cv;	397	CV *cv;
314		398
315	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
317	{	401	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
324	}	404	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	405	}
328		406
329	PUTBACK;	407	PUTBACK;
330	}	408	}
331	}	409	}
332		410
333	static void	411	static void
334	save_state(pTHX_ Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
335	{	413	{
336	{	414	{
337	dSP;	415	dSP;
338	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	420	/*
343	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
345	*/	423	*/
346		424
347	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
349	for (;;)	427	for (;;)
350	{	428	{
351	while (cxix >= 0)	429	while (cxix >= 0)
352	{	430	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
354		432
355	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
356	{	434	{
357	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
358	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
359	{	438	{
360	EXTEND (SP, CvDEPTH(cv)*2);	439	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
371		443
		444	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	445	get_padlist (aTHX_ cv);
373	}	446	}
374	}	447	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	448	}
384		449
385	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
386	break;	451	break;
387		452
388	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
391	}	456	}
392		457
393	PUTBACK;	458	PUTBACK;
394	}	459	}
395		460
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = GvIOp (PL_defoutgv);
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
399		467
400	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	469	# include "state.h"
402		470	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	471	}
435		472
436	/*	473	/*
437	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
441	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
442	static void	482	static void
443	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
444	{	484	{
445	LOCK;	485	PL_curstackinfo = new_stackinfo(64, 6);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		489
452	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		493
456	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	497	PL_tmps_max = 64;
460		498
461	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
464		502
…		…
468		506
469	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
472		510
473	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	513	PL_savestack_max = 64;
476		514
477	#if PERL_VERSION < 9	515	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	518	PL_retstack_max = 4;
481	#endif	519	#endif
482
483	UNLOCK;
484	}	520	}
		521	#endif
485		522
486	/*	523	/*
487	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
488	*/	525	*/
489	static void	526	static void
490	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
491	{	528	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501	}
502
503	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
505		531
506	while (PL_curstackinfo)	532	while (PL_curstackinfo)
507	{	533	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
509		535
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		538
522	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	541	PL_curstackinfo = p;
525	}	542	}
526		543
527	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	545	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	547	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	549	Safefree (PL_retstack);
533	#endif	550	#endif
534	}	551	}
535		552
		553	static size_t
		554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/** coroutine stack handling ************************************************/
		585
536	static void	586	static void
537	setup_coro (struct coro *coro)	587	setup_coro (pTHX_ struct coro *coro)
538	{	588	{
539	/*	589	/*
540	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
541	*/	591	*/
542	dTHX;	592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVsv (PL_rs);
		607	PL_rs = newSVpvn ("\n", 1);
		608
		609	{
		610	IO *io = newIO ();
		611	GvIOp(PL_defoutgv) = io;
		612	IoTYPE (io) = IoTYPE_WRONLY;
		613	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		614	IoFLAGS (io) |= IOf_FLUSH;
		615	}
		616
		617	{
		618	dSP;
		619	LOGOP myop;
		620
		621	Zero (&myop, 1, LOGOP);
		622	myop.op_next = Nullop;
		623	myop.op_flags = OPf_WANT_VOID;
		624
		625	PUSHMARK (SP);
		626	XPUSHs (av_shift (GvAV (PL_defgv)));
		627	PUTBACK;
		628	PL_op = (OP *)&myop;
		629	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		630	SPAGAIN;
		631	}
		632
		633	ENTER; /* necessary e.g. for dounwind */
		634	}
		635
		636	static void
		637	destroy_coro (pTHX_ struct coro *coro)
		638	{
		639	if (!IN_DESTRUCT)
		640	{
		641	/* restore all saved variables and stuff */
		642	LEAVE_SCOPE (0);
		643	assert (PL_tmps_floor == -1);
		644
		645	/* free all temporaries */
		646	FREETMPS;
		647	assert (PL_tmps_ix == -1);
		648
		649	/* unwind all extra stacks */
		650	POPSTACK_TO (PL_mainstack);
		651
		652	/* unwind main stack */
		653	dounwind (-1);
		654	}
		655
		656	SvREFCNT_dec (GvSV (PL_defgv));
		657	SvREFCNT_dec (GvAV (PL_defgv));
		658	SvREFCNT_dec (GvSV (PL_errgv));
		659	SvREFCNT_dec (GvIOp(PL_defoutgv));
		660	SvREFCNT_dec (PL_rs);
		661	SvREFCNT_dec (GvSV (irsgv));
		662
		663	coro_destroy_stacks (aTHX);
		664	}
		665
		666	static void
		667	free_coro_mortal (pTHX)
		668	{
		669	if (coro_mortal)
		670	{
		671	SvREFCNT_dec (coro_mortal);
		672	coro_mortal = 0;
		673	}
		674	}
		675
		676	static int
		677	runops_trace (pTHX)
		678	{
		679	COP *oldcop = 0;
		680	int oldcxix = -2;
		681	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		682	coro_cctx *cctx = coro->cctx;
		683
		684	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		685	{
		686	PERL_ASYNC_CHECK ();
		687
		688	if (cctx->flags & CC_TRACE_ALL)
		689	{
		690	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		691	{
		692	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		693	SV **bot, **top;
		694	AV *av = newAV (); /* return values */
		695	SV **cb;
		696	dSP;
		697
		698	GV *gv = CvGV (cx->blk_sub.cv);
		699	SV *fullname = sv_2mortal (newSV (0));
		700	if (isGV (gv))
		701	gv_efullname3 (fullname, gv, 0);
		702
		703	bot = PL_stack_base + cx->blk_oldsp + 1;
		704	top = cx->blk_gimme == G_ARRAY ? SP + 1
		705	: cx->blk_gimme == G_SCALAR ? bot + 1
		706	: bot;
		707
		708	while (bot < top)
		709	av_push (av, SvREFCNT_inc (*bot++));
		710
		711	PL_runops = RUNOPS_DEFAULT;
		712	ENTER;
		713	SAVETMPS;
		714	EXTEND (SP, 3);
		715	PUSHMARK (SP);
		716	PUSHs (&PL_sv_no);
		717	PUSHs (fullname);
		718	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		719	PUTBACK;
		720	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		721	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		722	SPAGAIN;
		723	FREETMPS;
		724	LEAVE;
		725	PL_runops = runops_trace;
		726	}
		727
		728	if (oldcop != PL_curcop)
		729	{
		730	oldcop = PL_curcop;
		731
		732	if (PL_curcop != &PL_compiling)
		733	{
		734	SV **cb;
		735
		736	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		737	{
		738	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		739
		740	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		741	{
		742	runops_proc_t old_runops = PL_runops;
		743	dSP;
		744	GV *gv = CvGV (cx->blk_sub.cv);
		745	SV *fullname = sv_2mortal (newSV (0));
		746
		747	if (isGV (gv))
		748	gv_efullname3 (fullname, gv, 0);
		749
		750	PL_runops = RUNOPS_DEFAULT;
		751	ENTER;
		752	SAVETMPS;
		753	EXTEND (SP, 3);
		754	PUSHMARK (SP);
		755	PUSHs (&PL_sv_yes);
		756	PUSHs (fullname);
		757	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		758	PUTBACK;
		759	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		760	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		761	SPAGAIN;
		762	FREETMPS;
		763	LEAVE;
		764	PL_runops = runops_trace;
		765	}
		766
		767	oldcxix = cxstack_ix;
		768	}
		769
		770	if (cctx->flags & CC_TRACE_LINE)
		771	{
		772	dSP;
		773
		774	PL_runops = RUNOPS_DEFAULT;
		775	ENTER;
		776	SAVETMPS;
		777	EXTEND (SP, 3);
		778	PL_runops = RUNOPS_DEFAULT;
		779	PUSHMARK (SP);
		780	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		781	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		782	PUTBACK;
		783	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		784	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		785	SPAGAIN;
		786	FREETMPS;
		787	LEAVE;
		788	PL_runops = runops_trace;
		789	}
		790	}
		791	}
		792	}
		793	}
		794
		795	TAINT_NOT;
		796	return 0;
		797	}
		798
		799	/* inject a fake call to Coro::State::_cctx_init into the execution */
		800	/* _cctx_init should be careful, as it could be called at almost any time */
		801	/* during execution of a perl program */
		802	static void NOINLINE
		803	prepare_cctx (pTHX_ coro_cctx *cctx)
		804	{
543	dSP;	805	dSP;
544	UNOP myop;	806	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		807
547	coro_init_stacks (aTHX);	808	PL_top_env = &PL_start_env;
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		809
553	SPAGAIN;	810	if (cctx->flags & CC_TRACE)
		811	PL_runops = runops_trace;
554		812
555	Zero (&myop, 1, UNOP);	813	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	814	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	815	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		816
		817	PUSHMARK (SP);
		818	EXTEND (SP, 2);
		819	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		820	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		821	PUTBACK;
559	PL_op = (OP *)&myop;	822	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	824	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	825	}
569		826
		827	/*
		828	* this is a _very_ stripped down perl interpreter ;)
		829	*/
570	static void	830	static void
571	transfer_tail ()	831	coro_run (void *arg)
572	{	832	{
573	if (coro_mortal)	833	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		834
		835	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	836	UNLOCK;
580	}
581		837
582	static void	838	/* we now skip the entersub that lead to transfer() */
583	coro_run (void *arg)	839	PL_op = PL_op->op_next;
584	{	840
		841	/* inject a fake subroutine call to cctx_init */
		842	prepare_cctx (aTHX_ (coro_cctx *)arg);
		843
		844	/* somebody or something will hit me for both perl_run and PL_restartop */
		845	PL_restartop = PL_op;
		846	perl_run (PL_curinterp);
		847
585	/*	848	/*
586	* this is a _very_ stripped down perl interpreter ;)	849	* If perl-run returns we assume exit() was being called or the coro
		850	* fell off the end, which seems to be the only valid (non-bug)
		851	* reason for perl_run to return. We try to exit by jumping to the
		852	* bootstrap-time "top" top_env, as we cannot restore the "main"
		853	* coroutine as Coro has no such concept
587	*/	854	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	855	PL_top_env = main_top_env;
593	PL_restartop = PL_op->op_next;	856	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	857	}
599		858
600	static coro_stack *	859	static coro_cctx *
601	stack_new ()	860	cctx_new ()
602	{	861	{
603	coro_stack *stack;	862	coro_cctx *cctx;
		863	void *stack_start;
		864	size_t stack_size;
604		865
		866	++cctx_count;
		867
605	New (0, stack, 1, coro_stack);	868	Newz (0, cctx, 1, coro_cctx);
606		869
607	#if HAVE_MMAP	870	#if HAVE_MMAP
608		871
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	872	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		873	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	874	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		875
612	if (stack->sptr == (void *)-1)	876	if (cctx->sptr != (void *)-1)
		877	{
		878	# if CORO_STACKGUARD
		879	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		880	# endif
		881	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		882	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		883	cctx->flags |= CC_MAPPED;
613	{	884	}
		885	else
		886	#endif
		887	{
		888	cctx->ssize = coro_stacksize * (long)sizeof (long);
		889	New (0, cctx->sptr, coro_stacksize, long);
		890
		891	if (!cctx->sptr)
		892	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	893	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	894	_exit (EXIT_FAILURE);
616	}	895	}
617		896
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	897	stack_start = cctx->sptr;
619		898	stack_size = cctx->ssize;
620	#else
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	899	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		900
631	#endif	901	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	902	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
634		903
635	return stack;	904	return cctx;
636	}	905	}
637		906
638	static void	907	static void
639	stack_free (coro_stack *stack)	908	cctx_destroy (coro_cctx *cctx)
640	{	909	{
641	if (!stack || stack == main_stack)	910	if (!cctx)
642	return;	911	return;
643		912
		913	--cctx_count;
		914
		915	#if CORO_USE_VALGRIND
		916	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		917	#endif
		918
644	#if HAVE_MMAP	919	#if HAVE_MMAP
		920	if (cctx->flags & CC_MAPPED)
645	munmap (stack->sptr, stack->ssize);	921	munmap (cctx->sptr, cctx->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static void
656	stack_get (struct coro *coro)
657	{
658	if (stack_first)
659	{
660	coro->stack = stack_first;
661	stack_first = stack_first->next;
662	}
663	else	922	else
664	coro->stack = stack_new ();	923	#endif
665	}	924	Safefree (cctx->sptr);
666		925
667	static void	926	Safefree (cctx);
668	stack_put (coro_stack *stack)
669	{
670	stack->next = stack_first;
671	stack_first = stack;
672	}	927	}
673		928
674	/* never call directly, always through the coro_state_transfer global variable */	929	static coro_cctx *
		930	cctx_get (pTHX)
		931	{
		932	while (cctx_first)
		933	{
		934	coro_cctx *cctx = cctx_first;
		935	cctx_first = cctx->next;
		936	--cctx_idle;
		937
		938	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		939	return cctx;
		940
		941	cctx_destroy (cctx);
		942	}
		943
		944	return cctx_new ();
		945	}
		946
675	static void	947	static void
		948	cctx_put (coro_cctx *cctx)
		949	{
		950	/* free another cctx if overlimit */
		951	if (cctx_idle >= MAX_IDLE_CCTX)
		952	{
		953	coro_cctx *first = cctx_first;
		954	cctx_first = first->next;
		955	--cctx_idle;
		956
		957	cctx_destroy (first);
		958	}
		959
		960	++cctx_idle;
		961	cctx->next = cctx_first;
		962	cctx_first = cctx;
		963	}
		964
		965	/** coroutine switching *****************************************************/
		966
		967	static void NOINLINE
		968	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		969	{
		970	if (prev != next)
		971	{
		972	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		973	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		974
		975	if (next->flags & CF_RUNNING)
		976	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		977
		978	if (next->flags & CF_DESTROYED)
		979	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		980
		981	if (PL_lex_state != LEX_NOTPARSING)
		982	croak ("Coro::State::transfer called while parsing, but this is not supported");
		983	}
		984	}
		985
		986	/* always use the TRANSFER macro */
		987	static void NOINLINE
676	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	988	transfer (pTHX_ struct coro *prev, struct coro *next)
677	{	989	{
678	dSTACKLEVEL;	990	dSTACKLEVEL;
679		991
680	/* sometimes transfer is only called to set idle_sp */	992	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	993	if (!next)
682	prev->stack->idle_sp = stacklevel;	994	{
683		995	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	996	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
685		997	}
686	if (prev != next)	998	else if (prev != next)
687	{	999	{
688	coro_stack *prev_stack = prev->stack;	1000	coro_cctx *prev__cctx;
689		1001
690	/* possibly "free" the stack */	1002	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	1003	{
693	stack_put (prev_stack);	1004	/* create a new empty context */
694	prev->stack = 0;	1005	Newz (0, prev->cctx, 1, coro_cctx);
		1006	prev->flags &= ~CF_NEW;
		1007	prev->flags |= CF_RUNNING;
695	}	1008	}
696		1009
697	if (!next->mainstack)	1010	prev->flags &= ~CF_RUNNING;
		1011	next->flags |= CF_RUNNING;
		1012
		1013	LOCK;
		1014
		1015	if (next->flags & CF_NEW)
698	{	1016	{
		1017	/* need to start coroutine */
		1018	next->flags &= ~CF_NEW;
699	/* first get rid of the old state */	1019	/* first get rid of the old state */
700	SAVE (prev, -1);	1020	save_perl (aTHX_ prev);
701	/* setup coroutine call */	1021	/* setup coroutine call */
702	setup_coro (next);	1022	setup_coro (aTHX_ next);
703	next->stack = 0;
704	}	1023	}
705	else	1024	else
706	{	1025	{
707	SAVE (prev, flags);	1026	/* coroutine already started */
708	LOAD (next);	1027	save_perl (aTHX_ prev);
		1028	load_perl (aTHX_ next);
709	}	1029	}
710		1030
		1031	prev__cctx = prev->cctx;
		1032
		1033	/* possibly "free" the cctx */
		1034	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
		1035	{
		1036	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1037	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1038
		1039	prev->cctx = 0;
		1040
		1041	cctx_put (prev__cctx);
		1042	}
		1043
		1044	++next->usecount;
		1045
711	if (!next->stack)	1046	if (!next->cctx)
712	stack_get (next);	1047	next->cctx = cctx_get (aTHX);
713		1048
714	if (prev_stack != next->stack)	1049	if (prev__cctx != next->cctx)
		1050	{
		1051	prev__cctx->top_env = PL_top_env;
		1052	PL_top_env = next->cctx->top_env;
715	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1053	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
716	}	1054	}
717		1055
718	transfer_tail ();	1056	free_coro_mortal (aTHX);
		1057	UNLOCK;
		1058	}
719	}	1059	}
720		1060
721	/* use this function pointer to call the above function */	1061	struct transfer_args
722	/* this is done to increase chances of the compiler not inlining the call */	1062	{
723	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1063	struct coro *prev, *next;
		1064	};
724		1065
		1066	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1067	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1068
		1069	/** high level stuff ********************************************************/
		1070
725	static void	1071	static int
726	coro_state_destroy (struct coro *coro)	1072	coro_state_destroy (pTHX_ struct coro *coro)
727	{	1073	{
728	if (coro->refcnt--)	1074	if (coro->flags & CF_DESTROYED)
729	return;	1075	return 0;
		1076
		1077	coro->flags |= CF_DESTROYED;
		1078
		1079	if (coro->flags & CF_READY)
		1080	{
		1081	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1082	/* alternative: look through all ready queues and remove the coro */
		1083	LOCK;
		1084	--coro_nready;
		1085	UNLOCK;
		1086	}
		1087	else
		1088	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
730		1089
731	if (coro->mainstack && coro->mainstack != main_mainstack)	1090	if (coro->mainstack && coro->mainstack != main_mainstack)
732	{	1091	{
733	struct coro temp;	1092	struct coro temp;
734		1093
735	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1094	if (coro->flags & CF_RUNNING)
		1095	croak ("FATAL: tried to destroy currently running coroutine");
		1096
		1097	save_perl (aTHX_ &temp);
736	LOAD (aTHX_ coro);	1098	load_perl (aTHX_ coro);
737		1099
738	destroy_stacks (aTHX);	1100	destroy_coro (aTHX_ coro);
739		1101
740	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1102	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
741		1103
742	coro->mainstack = 0;	1104	coro->mainstack = 0;
743	}	1105	}
744		1106
745	stack_free (coro->stack);	1107	cctx_destroy (coro->cctx);
746	SvREFCNT_dec (coro->args);	1108	SvREFCNT_dec (coro->args);
747	Safefree (coro);	1109
		1110	if (coro->next) coro->next->prev = coro->prev;
		1111	if (coro->prev) coro->prev->next = coro->next;
		1112	if (coro == coro_first) coro_first = coro->next;
		1113
		1114	return 1;
748	}	1115	}
749		1116
750	static int	1117	static int
751	coro_state_clear (SV *sv, MAGIC *mg)	1118	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
752	{	1119	{
753	struct coro *coro = (struct coro *)mg->mg_ptr;	1120	struct coro *coro = (struct coro *)mg->mg_ptr;
754	mg->mg_ptr = 0;	1121	mg->mg_ptr = 0;
755		1122
		1123	coro->hv = 0;
		1124
		1125	if (--coro->refcnt < 0)
		1126	{
756	coro_state_destroy (coro);	1127	coro_state_destroy (aTHX_ coro);
		1128	Safefree (coro);
		1129	}
757		1130
758	return 0;	1131	return 0;
759	}	1132	}
760		1133
761	static int	1134	static int
762	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1135	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
763	{	1136	{
764	struct coro *coro = (struct coro *)mg->mg_ptr;	1137	struct coro *coro = (struct coro *)mg->mg_ptr;
765		1138
766	++coro->refcnt;	1139	++coro->refcnt;
767		1140
768	return 0;	1141	return 0;
769	}	1142	}
770		1143
771	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1144	static MGVTBL coro_state_vtbl = {
		1145	0, 0, 0, 0,
		1146	coro_state_free,
		1147	0,
		1148	#ifdef MGf_DUP
		1149	coro_state_dup,
		1150	#else
		1151	# define MGf_DUP 0
		1152	#endif
		1153	};
772		1154
773	static struct coro *
774	SvSTATE (SV *coro)
775	{
776	HV *stash;
777	MAGIC *mg;
778
779	if (SvROK (coro))
780	coro = SvRV (coro);
781
782	stash = SvSTASH (coro);
783	if (stash != coro_stash && stash != coro_state_stash)
784	{
785	/* very slow, but rare, check */
786	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
787	croak ("Coro::State object required");
788	}
789
790	mg = SvMAGIC (coro);
791	assert (mg->mg_type == PERL_MAGIC_ext);
792	return (struct coro *)mg->mg_ptr;
793	}
794
795	static void	1155	static void
		1156	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1157	{
		1158	ta->prev = SvSTATE (prev_sv);
		1159	ta->next = SvSTATE (next_sv);
		1160	TRANSFER_CHECK (*ta);
		1161	}
		1162
		1163	static void
796	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1164	api_transfer (SV *prev_sv, SV *next_sv)
797	{	1165	{
798	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1166	dTHX;
		1167	struct transfer_args ta;
		1168
		1169	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1170	TRANSFER (ta);
799	}	1171	}
800		1172
801	/** Coro ********************************************************************/	1173	/** Coro ********************************************************************/
802		1174
803	#define PRIO_MAX 3
804	#define PRIO_HIGH 1
805	#define PRIO_NORMAL 0
806	#define PRIO_LOW -1
807	#define PRIO_IDLE -3
808	#define PRIO_MIN -4
809
810	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;
812	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;
814
815	static void	1175	static void
816	coro_enq (pTHX_ SV *sv)	1176	coro_enq (pTHX_ SV *coro_sv)
817	{	1177	{
818	int prio;
819
820	if (SvTYPE (sv) != SVt_PVHV)
821	croak ("Coro::ready tried to enqueue something that is not a coroutine");
822
823	prio = SvSTATE (sv)->prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	1178	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;
827	}	1179	}
828		1180
829	static SV *	1181	static SV *
830	coro_deq (pTHX_ int min_prio)	1182	coro_deq (pTHX_ int min_prio)
831	{	1183	{
…		…
835	if (min_prio < 0)	1187	if (min_prio < 0)
836	min_prio = 0;	1188	min_prio = 0;
837		1189
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1190	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (AvFILLp (coro_ready [prio]) >= 0)	1191	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready [prio]);	1192	return av_shift (coro_ready [prio]);
843	}
844		1193
845	return 0;	1194	return 0;
846	}	1195	}
847		1196
848	static void	1197	static int
849	api_ready (SV *coro)	1198	api_ready (SV *coro_sv)
850	{	1199	{
851	dTHX;	1200	dTHX;
		1201	struct coro *coro;
852		1202
853	if (SvROK (coro))	1203	if (SvROK (coro_sv))
854	coro = SvRV (coro);	1204	coro_sv = SvRV (coro_sv);
		1205
		1206	coro = SvSTATE (coro_sv);
		1207
		1208	if (coro->flags & CF_READY)
		1209	return 0;
		1210
		1211	coro->flags |= CF_READY;
855		1212
856	LOCK;	1213	LOCK;
857	coro_enq (aTHX_ SvREFCNT_inc (coro));	1214	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1215	++coro_nready;
858	UNLOCK;	1216	UNLOCK;
		1217
		1218	return 1;
		1219	}
		1220
		1221	static int
		1222	api_is_ready (SV *coro_sv)
		1223	{
		1224	dTHX;
		1225	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1226	}
		1227
		1228	static void
		1229	prepare_schedule (pTHX_ struct transfer_args *ta)
		1230	{
		1231	SV *prev_sv, *next_sv;
		1232
		1233	for (;;)
		1234	{
		1235	LOCK;
		1236	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1237
		1238	/* nothing to schedule: call the idle handler */
		1239	if (!next_sv)
		1240	{
		1241	dSP;
		1242	UNLOCK;
		1243
		1244	ENTER;
		1245	SAVETMPS;
		1246
		1247	PUSHMARK (SP);
		1248	PUTBACK;
		1249	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1250
		1251	FREETMPS;
		1252	LEAVE;
		1253	continue;
		1254	}
		1255
		1256	ta->next = SvSTATE (next_sv);
		1257
		1258	/* cannot transfer to destroyed coros, skip and look for next */
		1259	if (ta->next->flags & CF_DESTROYED)
		1260	{
		1261	UNLOCK;
		1262	SvREFCNT_dec (next_sv);
		1263	/* coro_nready is already taken care of by destroy */
		1264	continue;
		1265	}
		1266
		1267	--coro_nready;
		1268	UNLOCK;
		1269	break;
		1270	}
		1271
		1272	/* free this only after the transfer */
		1273	prev_sv = SvRV (coro_current);
		1274	ta->prev = SvSTATE (prev_sv);
		1275	TRANSFER_CHECK (*ta);
		1276	assert (ta->next->flags & CF_READY);
		1277	ta->next->flags &= ~CF_READY;
		1278	SvRV_set (coro_current, next_sv);
		1279
		1280	LOCK;
		1281	free_coro_mortal (aTHX);
		1282	coro_mortal = prev_sv;
		1283	UNLOCK;
		1284	}
		1285
		1286	static void
		1287	prepare_cede (pTHX_ struct transfer_args *ta)
		1288	{
		1289	api_ready (coro_current);
		1290	prepare_schedule (aTHX_ ta);
		1291	}
		1292
		1293	static int
		1294	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1295	{
		1296	if (coro_nready)
		1297	{
		1298	SV *prev = SvRV (coro_current);
		1299	prepare_schedule (aTHX_ ta);
		1300	api_ready (prev);
		1301	return 1;
		1302	}
		1303	else
		1304	return 0;
859	}	1305	}
860		1306
861	static void	1307	static void
862	api_schedule (void)	1308	api_schedule (void)
863	{	1309	{
864	dTHX;	1310	dTHX;
		1311	struct transfer_args ta;
865		1312
866	SV *prev, *next;	1313	prepare_schedule (aTHX_ &ta);
867	SV *current = GvSV (coro_current);	1314	TRANSFER (ta);
868
869	for (;;)
870	{
871	LOCK;
872
873	next = coro_deq (aTHX_ PRIO_MIN);
874
875	if (next)
876	break;
877
878	UNLOCK;
879
880	{
881	dSP;
882
883	ENTER;
884	SAVETMPS;
885
886	PUSHMARK (SP);
887	PUTBACK;
888	call_sv (GvSV (coro_idle), G_DISCARD);
889
890	FREETMPS;
891	LEAVE;
892	}
893	}
894
895	prev = SvRV (current);
896	SvRV (current) = next;
897
898	/* free this only after the transfer */
899	coro_mortal = prev;
900
901	UNLOCK;
902
903	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
904	}	1315	}
905		1316
906	static int coro_cede_self;
907
908	static void	1317	static int
909	api_cede (void)	1318	api_cede (void)
910	{	1319	{
911	dTHX;	1320	dTHX;
912	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1321	struct transfer_args ta;
913		1322
914	LOCK;	1323	prepare_cede (aTHX_ &ta);
915		1324
916	if (coro_cede_self)	1325	if (ta.prev != ta.next)
917	{	1326	{
918	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1327	TRANSFER (ta);
919	av_unshift (runqueue, 1);	1328	return 1;
920	av_store (runqueue, 0, current);
921	coro_nready++;
922	coro_cede_self = 0;
923	}	1329	}
924	else	1330	else
925	coro_enq (aTHX_ current);	1331	return 0;
926
927	UNLOCK;
928
929	api_schedule ();
930	}	1332	}
931		1333
		1334	static int
		1335	api_cede_notself (void)
		1336	{
		1337	dTHX;
		1338	struct transfer_args ta;
		1339
		1340	if (prepare_cede_notself (aTHX_ &ta))
		1341	{
		1342	TRANSFER (ta);
		1343	return 1;
		1344	}
		1345	else
		1346	return 0;
		1347	}
		1348
		1349	static void
		1350	api_trace (SV *coro_sv, int flags)
		1351	{
		1352	dTHX;
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354
		1355	if (flags & CC_TRACE)
		1356	{
		1357	if (!coro->cctx)
		1358	coro->cctx = cctx_new ();
		1359	else if (!(coro->cctx->flags & CC_TRACE))
		1360	croak ("cannot enable tracing on coroutine with custom stack");
		1361
		1362	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1363	}
		1364	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1365	{
		1366	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1367
		1368	if (coro->flags & CF_RUNNING)
		1369	PL_runops = RUNOPS_DEFAULT;
		1370	else
		1371	coro->runops = RUNOPS_DEFAULT;
		1372	}
		1373	}
		1374
932	MODULE = Coro::State PACKAGE = Coro::State	1375	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
933		1376
934	PROTOTYPES: DISABLE	1377	PROTOTYPES: DISABLE
935		1378
936	BOOT:	1379	BOOT:
937	{	1380	{
938	#ifdef USE_ITHREADS	1381	#ifdef USE_ITHREADS
939	MUTEX_INIT (&coro_mutex);	1382	MUTEX_INIT (&coro_mutex);
940	#endif	1383	#endif
941	BOOT_PAGESIZE;	1384	BOOT_PAGESIZE;
942		1385
		1386	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1387
943	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1388	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
944		1389
945	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
946	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
947	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1393	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
948		1394
949	main_mainstack = PL_mainstack;	1395	main_mainstack = PL_mainstack;
		1396	main_top_env = PL_top_env;
		1397
		1398	while (main_top_env->je_prev)
		1399	main_top_env = main_top_env->je_prev;
950		1400
951	coroapi.ver = CORO_API_VERSION;	1401	coroapi.ver = CORO_API_VERSION;
952	coroapi.transfer = api_transfer;	1402	coroapi.transfer = api_transfer;
953
954	Newz (0, main_stack, 1, coro_stack);
955	main_stack->idle_sp = (void *)-1;
956		1403
957	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1404	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
958	}	1405	}
959		1406
960	SV *	1407	SV *
…		…
964	struct coro *coro;	1411	struct coro *coro;
965	HV *hv;	1412	HV *hv;
966	int i;	1413	int i;
967		1414
968	Newz (0, coro, 1, struct coro);	1415	Newz (0, coro, 1, struct coro);
969	coro->args = newAV ();	1416	coro->args = newAV ();
		1417	coro->flags = CF_NEW;
970		1418
		1419	if (coro_first) coro_first->prev = coro;
		1420	coro->next = coro_first;
		1421	coro_first = coro;
		1422
971	hv = newHV ();	1423	coro->hv = hv = newHV ();
972	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1424	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
973	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1425	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
974		1426
975	av_push (coro->args, newSVsv (RETVAL));
976	for (i = 1; i < items; i++)	1427	for (i = 1; i < items; i++)
977	av_push (coro->args, newSVsv (ST (i)));	1428	av_push (coro->args, newSVsv (ST (i)));
978
979	coro->stack = main_stack;
980	/*coro->mainstack = 0; *//*actual work is done inside transfer */
981	/*coro->stack = 0;*/
982	}	1429	}
983	OUTPUT:	1430	OUTPUT:
984	RETVAL	1431	RETVAL
985		1432
		1433	# these not obviously related functions are all rolled into the same xs
		1434	# function to increase chances that they all will call transfer with the same
		1435	# stack offset
986	void	1436	void
987	transfer (prev, next, flags)	1437	_set_stacklevel (...)
988	SV *prev	1438	ALIAS:
989	SV *next	1439	Coro::State::transfer = 1
990	int flags	1440	Coro::schedule = 2
		1441	Coro::cede = 3
		1442	Coro::cede_notself = 4
991	CODE:	1443	CODE:
992	PUTBACK;
993	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
994	SPAGAIN;
995
996	int
997	prio (Coro::State coro, int newprio = 0)
998	ALIAS:
999	nice = 1
1000	CODE:
1001	{	1444	{
1002	RETVAL = coro->prio;	1445	struct transfer_args ta;
1003		1446
1004	if (items > 1)	1447	switch (ix)
1005	{	1448	{
		1449	case 0:
		1450	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1451	ta.next = 0;
		1452	break;
		1453
		1454	case 1:
1006	if (ix)	1455	if (items != 2)
1007	newprio += coro->prio;	1456	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1008		1457
1009	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1458	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1010	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1459	break;
1011		1460
1012	coro->prio = newprio;	1461	case 2:
		1462	prepare_schedule (aTHX_ &ta);
		1463	break;
		1464
		1465	case 3:
		1466	prepare_cede (aTHX_ &ta);
		1467	break;
		1468
		1469	case 4:
		1470	if (!prepare_cede_notself (aTHX_ &ta))
		1471	XSRETURN_EMPTY;
		1472
		1473	break;
1013	}	1474	}
1014	}
1015		1475
1016	void	1476	BARRIER;
1017	_clear_idle_sp (Coro::State self)	1477	TRANSFER (ta);
		1478
		1479	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1480	XSRETURN_YES;
		1481	}
		1482
		1483	bool
		1484	_destroy (SV *coro_sv)
1018	CODE:	1485	CODE:
1019	self->stack->idle_sp = 0;	1486	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1020		1487	OUTPUT:
1021	void	1488	RETVAL
1022	_clone_state_from (SV *dst, SV *src)
1023	CODE:
1024	{
1025	struct coro *coro_src = SvSTATE (src);
1026
1027	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028
1029	++coro_src->refcnt;
1030	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1031	}
1032		1489
1033	void	1490	void
1034	_exit (code)	1491	_exit (code)
1035	int code	1492	int code
1036	PROTOTYPE: $	1493	PROTOTYPE: $
1037	CODE:	1494	CODE:
1038	_exit (code);	1495	_exit (code);
1039		1496
1040	MODULE = Coro::State PACKAGE = Coro::Cont	1497	int
		1498	cctx_stacksize (int new_stacksize = 0)
		1499	CODE:
		1500	RETVAL = coro_stacksize;
		1501	if (new_stacksize)
		1502	coro_stacksize = new_stacksize;
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	int
		1507	cctx_count ()
		1508	CODE:
		1509	RETVAL = cctx_count;
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
		1514	cctx_idle ()
		1515	CODE:
		1516	RETVAL = cctx_idle;
		1517	OUTPUT:
		1518	RETVAL
1041		1519
1042	void	1520	void
1043	yield (...)	1521	list ()
1044	PROTOTYPE: @	1522	PPCODE:
		1523	{
		1524	struct coro *coro;
		1525	for (coro = coro_first; coro; coro = coro->next)
		1526	if (coro->hv)
		1527	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1528	}
		1529
		1530	void
		1531	call (Coro::State coro, SV *coderef)
		1532	ALIAS:
		1533	eval = 1
		1534	CODE:
		1535	{
		1536	if (coro->mainstack)
		1537	{
		1538	struct coro temp;
		1539	Zero (&temp, 1, struct coro);
		1540
		1541	if (!(coro->flags & CF_RUNNING))
		1542	{
		1543	save_perl (aTHX_ &temp);
		1544	load_perl (aTHX_ coro);
		1545	}
		1546
		1547	{
		1548	dSP;
		1549	ENTER;
		1550	SAVETMPS;
		1551	PUSHMARK (SP);
		1552	PUTBACK;
		1553	if (ix)
		1554	eval_sv (coderef, 0);
		1555	else
		1556	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1557	SPAGAIN;
		1558	FREETMPS;
		1559	LEAVE;
		1560	PUTBACK;
		1561	}
		1562
		1563	if (!(coro->flags & CF_RUNNING))
		1564	{
		1565	save_perl (aTHX_ coro);
		1566	load_perl (aTHX_ &temp);
		1567	}
		1568	}
		1569	}
		1570
		1571	SV *
		1572	is_ready (Coro::State coro)
		1573	PROTOTYPE: $
		1574	ALIAS:
		1575	is_ready = CF_READY
		1576	is_running = CF_RUNNING
		1577	is_new = CF_NEW
		1578	is_destroyed = CF_DESTROYED
		1579	CODE:
		1580	RETVAL = boolSV (coro->flags & ix);
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	void
		1585	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1586
		1587	SV *
		1588	has_stack (Coro::State coro)
		1589	PROTOTYPE: $
		1590	CODE:
		1591	RETVAL = boolSV (!!coro->cctx);
		1592	OUTPUT:
		1593	RETVAL
		1594
		1595	int
		1596	is_traced (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	IV
		1604	rss (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	usecount = 1
1045	CODE:	1608	CODE:
1046	{	1609	switch (ix)
1047	SV *yieldstack;	1610	{
1048	SV *sv;	1611	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1049	AV *defav = GvAV (PL_defgv);	1612	case 1: RETVAL = coro->usecount; break;
1050	struct coro *prev, *next;
1051
1052	yieldstack = *hv_fetch (
1053	(HV *)SvRV (GvSV (coro_current)),
1054	"yieldstack", sizeof ("yieldstack") - 1,
1055	0	1613	}
1056	);	1614	OUTPUT:
		1615	RETVAL
1057		1616
1058	/* set up @_ -- ugly */
1059	av_clear (defav);
1060	av_fill (defav, items - 1);
1061	while (items--)
1062	av_store (defav, items, SvREFCNT_inc (ST(items)));
1063
1064	sv = av_pop ((AV *)SvRV (yieldstack));
1065	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1066	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1067	SvREFCNT_dec (sv);
1068
1069	coro_state_transfer (aTHX_ prev, next, 0);
1070	}
1071		1617
1072	MODULE = Coro::State PACKAGE = Coro	1618	MODULE = Coro::State PACKAGE = Coro
1073		1619
1074	BOOT:	1620	BOOT:
1075	{	1621	{
1076	int i;	1622	int i;
		1623
		1624	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1625	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1626	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1627
		1628	coro_current = get_sv ("Coro::current", FALSE);
		1629	SvREADONLY_on (coro_current);
1077		1630
1078	coro_stash = gv_stashpv ("Coro", TRUE);	1631	coro_stash = gv_stashpv ("Coro", TRUE);
1079		1632
1080	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1633	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1634	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1635	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1636	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1637	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1638	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086		1639
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1640	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091	coro_ready[i] = newAV ();	1641	coro_ready[i] = newAV ();
1092		1642
1093	{	1643	{
1094	SV *sv = perl_get_sv("Coro::API", 1);	1644	SV *sv = perl_get_sv("Coro::API", 1);
1095		1645
1096	coroapi.schedule = api_schedule;	1646	coroapi.schedule = api_schedule;
1097	coroapi.cede = api_cede;	1647	coroapi.cede = api_cede;
		1648	coroapi.cede_notself = api_cede_notself;
1098	coroapi.ready = api_ready;	1649	coroapi.ready = api_ready;
		1650	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1651	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1652	coroapi.current = coro_current;
1101		1653
1102	GCoroAPI = &coroapi;	1654	GCoroAPI = &coroapi;
1103	sv_setiv (sv, (IV)&coroapi);	1655	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on (sv);	1656	SvREADONLY_on (sv);
1105	}	1657	}
1106	}	1658	}
1107		1659
1108	void	1660	void
		1661	_set_current (SV *current)
		1662	PROTOTYPE: $
		1663	CODE:
		1664	SvREFCNT_dec (SvRV (coro_current));
		1665	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1666
		1667	int
		1668	prio (Coro::State coro, int newprio = 0)
		1669	ALIAS:
		1670	nice = 1
		1671	CODE:
		1672	{
		1673	RETVAL = coro->prio;
		1674
		1675	if (items > 1)
		1676	{
		1677	if (ix)
		1678	newprio = coro->prio - newprio;
		1679
		1680	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1681	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1682
		1683	coro->prio = newprio;
		1684	}
		1685	}
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	SV *
1109	ready (SV *self)	1690	ready (SV *self)
1110	PROTOTYPE: $	1691	PROTOTYPE: $
1111	CODE:	1692	CODE:
1112	api_ready (self);	1693	RETVAL = boolSV (api_ready (self));
		1694	OUTPUT:
		1695	RETVAL
1113		1696
1114	int	1697	int
1115	nready (...)	1698	nready (...)
1116	PROTOTYPE:	1699	PROTOTYPE:
1117	CODE:	1700	CODE:
1118	RETVAL = coro_nready;	1701	RETVAL = coro_nready;
1119	OUTPUT:	1702	OUTPUT:
1120	RETVAL	1703	RETVAL
1121		1704
		1705	# for async_pool speedup
1122	void	1706	void
1123	schedule (...)	1707	_pool_1 (SV *cb)
1124	PROTOTYPE:
1125	CODE:	1708	CODE:
1126	api_schedule ();	1709	{
		1710	int i, len;
		1711	HV *hv = (HV *)SvRV (coro_current);
		1712	AV *defav = GvAV (PL_defgv);
		1713	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1714	AV *invoke_av;
		1715
		1716	if (!invoke)
		1717	croak ("\3terminate\2\n");
		1718
		1719	hv_store (hv, "desc", sizeof ("desc") - 1,
		1720	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1721
		1722	invoke_av = (AV *)SvRV (invoke);
		1723	len = av_len (invoke_av);
		1724
		1725	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1726
		1727	if (len > 0)
		1728	{
		1729	av_fill (defav, len - 1);
		1730	for (i = 0; i < len; ++i)
		1731	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1732	}
		1733
		1734	SvREFCNT_dec (invoke);
		1735	}
1127		1736
1128	void	1737	void
1129	_set_cede_self ()	1738	_pool_2 (SV *cb)
1130	CODE:	1739	CODE:
1131	coro_cede_self = 1;	1740	{
		1741	struct coro *coro = SvSTATE (coro_current);
1132		1742
1133	void	1743	sv_setsv (cb, &PL_sv_undef);
1134	cede (...)	1744
1135	PROTOTYPE:	1745	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1136	CODE:	1746	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1137	api_cede ();	1747	croak ("\3terminate\2\n");
		1748
		1749	av_clear (GvAV (PL_defgv));
		1750	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1751	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1752
		1753	coro->prio = 0;
		1754
		1755	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1756	api_trace (coro_current, 0);
		1757
		1758	av_push (av_async_pool, newSVsv (coro_current));
		1759	}
		1760
1138		1761
1139	MODULE = Coro::State PACKAGE = Coro::AIO	1762	MODULE = Coro::State PACKAGE = Coro::AIO
1140		1763
1141	SV *	1764	SV *
1142	_get_state ()	1765	_get_state ()
1143	CODE:	1766	CODE:
1144	{	1767	{
1145	struct {	1768	struct io_state *data;
1146	int errorno;
1147	int laststype;
1148	int laststatval;
1149	Stat_t statcache;
1150	} data;
1151		1769
		1770	RETVAL = newSV (sizeof (struct io_state));
		1771	data = (struct io_state *)SvPVX (RETVAL);
		1772	SvCUR_set (RETVAL, sizeof (struct io_state));
		1773	SvPOK_only (RETVAL);
		1774
1152	data.errorno = errno;	1775	data->errorno = errno;
1153	data.laststype = PL_laststype;	1776	data->laststype = PL_laststype;
1154	data.laststatval = PL_laststatval;	1777	data->laststatval = PL_laststatval;
1155	data.statcache = PL_statcache;	1778	data->statcache = PL_statcache;
1156
1157	RETVAL = newSVpvn ((char *)&data, sizeof data);
1158	}	1779	}
1159	OUTPUT:	1780	OUTPUT:
1160	RETVAL	1781	RETVAL
1161		1782
1162	void	1783	void
1163	_set_state (char *data_)	1784	_set_state (char *data_)
1164	PROTOTYPE: $	1785	PROTOTYPE: $
1165	CODE:	1786	CODE:
1166	{	1787	{
1167	struct {	1788	struct io_state *data = (void *)data_;
1168	int errorno;
1169	int laststype;
1170	int laststatval;
1171	Stat_t statcache;
1172	} *data = (void *)data_;
1173		1789
1174	errno = data->errorno;	1790	errno = data->errorno;
1175	PL_laststype = data->laststype;	1791	PL_laststype = data->laststype;
1176	PL_laststatval = data->laststatval;	1792	PL_laststatval = data->laststatval;
1177	PL_statcache = data->statcache;	1793	PL_statcache = data->statcache;
1178	}	1794	}
		1795

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