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Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.190 by root, Fri Oct 5 20:39:39 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
		10
		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
8		47
9	#define PERL_VERSION_ATLEAST(a,b,c) \	48	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	49	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	50	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	51	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <stdio.h>	75	/* 5.8.7 */
37	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
38		84
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	85	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	86	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	87	#endif
57	# include <limits.h>	88
58	# ifndef PAGESIZE	89	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	90	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	91	#endif
65	#endif
66		92
67	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* prefer perl internal functions over our own? */
68	* to the current C stack pointer. Its property is that it changes with each call	94	#ifndef CORO_PREFER_PERL_FUNCTIONS
69	* and should be unique. */	95	# define CORO_PREFER_PERL_FUNCTIONS 0
		96	#endif
		97
		98	/* The next macros try to return the current stack pointer, in an as
		99	* portable way as possible. */
70	#define dSTACKLEVEL int stacklevel	100	#define dSTACKLEVEL volatile char stacklevel
71	#define STACKLEVEL ((void *)&stacklevel)	101	#define STACKLEVEL ((void *)&stacklevel)
72		102
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	103	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		104
75	#if __GNUC__ >= 3	105	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	106	# define attribute(x) __attribute__(x)
		107	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	108	#else
78	# define attribute(x)	109	# define attribute(x)
		110	# define BARRIER
79	#endif	111	#endif
80		112
81	#define NOINLINE attribute ((noinline))	113	#define NOINLINE attribute ((noinline))
82		114
83	#include "CoroAPI.h"	115	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		116
87	#ifdef USE_ITHREADS	117	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	118	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	119	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	120	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	121	#else
92	# define LOCK (void)0	122	# define LOCK (void)0
93	# define UNLOCK (void)0	123	# define UNLOCK (void)0
94	#endif	124	#endif
95		125
		126	/* helper storage struct for Coro::AIO */
		127	struct io_state
		128	{
		129	int errorno;
		130	I32 laststype;
		131	int laststatval;
		132	Stat_t statcache;
		133	};
		134
		135	static size_t coro_stacksize = CORO_STACKSIZE;
96	static struct CoroAPI coroapi;	136	static struct CoroAPI coroapi;
97	static AV *main_mainstack; /* used to differentiate between $main and others */	137	static AV *main_mainstack; /* used to differentiate between $main and others */
		138	static JMPENV *main_top_env;
98	static HV *coro_state_stash, *coro_stash;	139	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	140	static SV *coro_mortal; /* will be freed after next transfer */
100		141
		142	static GV *irsgv; /* $/ */
		143	static GV *stdoutgv; /* *STDOUT */
		144
		145	/* async_pool helper stuff */
		146	static SV *sv_pool_rss;
		147	static SV *sv_pool_size;
		148	static AV *av_async_pool;
		149
		150	static struct coro_cctx *cctx_first;
		151	static int cctx_count, cctx_idle;
		152
		153	enum {
		154	CC_MAPPED = 0x01,
		155	CC_NOREUSE = 0x02, /* throw this away after tracing */
		156	CC_TRACE = 0x04,
		157	CC_TRACE_SUB = 0x08, /* trace sub calls */
		158	CC_TRACE_LINE = 0x10, /* trace each statement */
		159	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		160	};
		161
101	/* this is a structure representing a c-level coroutine */	162	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	163	typedef struct coro_cctx {
103	struct coro_stack *next;	164	struct coro_cctx *next;
104		165
105	/* the stack */	166	/* the stack */
106	void *sptr;	167	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	168	size_t ssize;
108		169
109	/* cpu state */	170	/* cpu state */
110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	171	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		172	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	173	JMPENV *top_env;
112	coro_context cctx;	174	coro_context cctx;
113	} coro_stack;	175
		176	#if CORO_USE_VALGRIND
		177	int valgrind_id;
		178	#endif
		179	unsigned char flags;
		180	} coro_cctx;
		181
		182	enum {
		183	CF_RUNNING = 0x0001, /* coroutine is running */
		184	CF_READY = 0x0002, /* coroutine is ready */
		185	CF_NEW = 0x0004, /* has never been switched to */
		186	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		187	};
114		188
115	/* this is a structure representing a perl-level coroutine */	189	/* this is a structure representing a perl-level coroutine */
116	struct coro {	190	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	191	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	192	coro_cctx *cctx;
119		193
120	/* data associated with this coroutine (initial args) */	194	/* data associated with this coroutine (initial args) */
121	AV *args;	195	AV *args;
122	int refcnt;	196	int refcnt;
		197	int flags; /* CF_ flags */
123		198
124	/* optionally saved, might be zero */	199	/* optionally saved, might be zero */
125	AV *defav;	200	AV *defav; /* @_ */
126	SV *defsv;	201	SV *defsv; /* $_ */
127	SV *errsv;	202	SV *errsv; /* $@ */
		203	SV *deffh; /* default filehandle */
		204	SV *irssv; /* $/ */
		205	SV *irssv_sv; /* real $/ cache */
128		206
129	/* saved global state not related to stacks */	207	#define VAR(name,type) type name;
130	U8 dowarn;	208	# include "state.h"
131	I32 in_eval;	209	#undef VAR
132		210
133	/* the stacks and related info (callchain etc..) */	211	/* statistics */
134	PERL_SI *curstackinfo;	212	int usecount; /* number of transfers to this coro */
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		213
163	/* coro process data */	214	/* coro process data */
164	int prio;	215	int prio;
		216	//SV *throw;
		217
		218	/* async_pool */
		219	SV *saved_deffh;
		220
		221	/* linked list */
		222	struct coro *next, *prev;
		223	HV *hv; /* the perl hash associated with this coro, if any */
165	};	224	};
166		225
167	typedef struct coro *Coro__State;	226	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	227	typedef struct coro *Coro__State_or_hashref;
169		228
		229	/** Coro ********************************************************************/
		230
		231	#define PRIO_MAX 3
		232	#define PRIO_HIGH 1
		233	#define PRIO_NORMAL 0
		234	#define PRIO_LOW -1
		235	#define PRIO_IDLE -3
		236	#define PRIO_MIN -4
		237
		238	/* for Coro.pm */
		239	static SV *coro_current;
		240	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		241	static int coro_nready;
		242	static struct coro *coro_first;
		243
		244	/** lowlevel stuff **********************************************************/
		245
170	static AV *	246	static AV *
171	coro_clone_padlist (CV *cv)	247	coro_clone_padlist (pTHX_ CV *cv)
172	{	248	{
173	AV *padlist = CvPADLIST (cv);	249	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	250	AV *newpadlist, *newpad;
175		251
176	newpadlist = newAV ();	252	newpadlist = newAV ();
…		…
188		264
189	return newpadlist;	265	return newpadlist;
190	}	266	}
191		267
192	static void	268	static void
193	free_padlist (AV *padlist)	269	free_padlist (pTHX_ AV *padlist)
194	{	270	{
195	/* may be during global destruction */	271	/* may be during global destruction */
196	if (SvREFCNT (padlist))	272	if (SvREFCNT (padlist))
197	{	273	{
198	I32 i = AvFILLp (padlist);	274	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	295	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	296	AV *av = (AV *)mg->mg_obj;
221		297
222	/* casting is fun. */	298	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	299	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	300	free_padlist (aTHX_ padlist);
225		301
226	SvREFCNT_dec (av);	302	SvREFCNT_dec (av);
227		303
228	return 0;	304	return 0;
229	}	305	}
230		306
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	307	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		308
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	309	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		310
		311	#define CORO_MAGIC(cv) \
		312	SvMAGIC (cv) \
		313	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		314	? SvMAGIC (cv) \
		315	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		316	: 0
		317
		318	static struct coro *
		319	SvSTATE_ (pTHX_ SV *coro)
		320	{
		321	HV *stash;
		322	MAGIC *mg;
		323
		324	if (SvROK (coro))
		325	coro = SvRV (coro);
		326
		327	if (SvTYPE (coro) != SVt_PVHV)
		328	croak ("Coro::State object required");
		329
		330	stash = SvSTASH (coro);
		331	if (stash != coro_stash && stash != coro_state_stash)
		332	{
		333	/* very slow, but rare, check */
		334	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		335	croak ("Coro::State object required");
		336	}
		337
		338	mg = CORO_MAGIC (coro);
		339	return (struct coro *)mg->mg_ptr;
		340	}
		341
		342	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		343
235	/* the next two functions merely cache the padlists */	344	/* the next two functions merely cache the padlists */
236	static void	345	static void
237	get_padlist (CV *cv)	346	get_padlist (pTHX_ CV *cv)
238	{	347	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	348	MAGIC *mg = CORO_MAGIC (cv);
		349	AV *av;
240		350
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	351	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	352	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	353	else
244	{	354	{
245	#if 0	355	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	356	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	357	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	358	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	359	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	360	SvREFCNT_dec (cp);
251	#else	361	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	362	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	363	#endif
254	}	364	}
255	}	365	}
256		366
257	static void	367	static void
258	put_padlist (CV *cv)	368	put_padlist (pTHX_ CV *cv)
259	{	369	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	MAGIC *mg = CORO_MAGIC (cv);
		371	AV *av;
261		372
262	if (!mg)	373	if (!mg)
263	{	374	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	375	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	376	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	377	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	378	mg->mg_obj = (SV *)newAV ();
268	}	379	}
269		380
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	381	av = (AV *)mg->mg_obj;
271	}
272		382
273	#define SB do {	383	if (AvFILLp (av) >= AvMAX (av))
274	#define SE } while (0)	384	av_extend (av, AvMAX (av) + 1);
275		385
276	#define LOAD(state) load_state((state));	386	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	#define SAVE(state,flags) save_state((state),(flags));	387	}
278		388
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	389	/** load & save, init *******************************************************/
280		390
281	static void	391	static void
282	load_state(Coro__State c)	392	load_perl (pTHX_ Coro__State c)
283	{	393	{
284	PL_dowarn = c->dowarn;	394	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	395	# include "state.h"
		396	#undef VAR
286		397
287	PL_curstackinfo = c->curstackinfo;	398	GvSV (PL_defgv) = c->defsv;
288	PL_curstack = c->curstack;	399	GvAV (PL_defgv) = c->defav;
289	PL_mainstack = c->mainstack;	400	GvSV (PL_errgv) = c->errsv;
290	PL_stack_sp = c->stack_sp;	401	GvSV (irsgv) = c->irssv_sv;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321		402
322	{	403	{
323	dSP;	404	dSP;
324	CV *cv;	405	CV *cv;
325		406
326	/* now do the ugly restore mess */	407	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	408	while ((cv = (CV *)POPs))
328	{	409	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	410	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	411	CvDEPTH (cv) = PTR2IV (POPs);
335	}	412	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	413	}
339		414
340	PUTBACK;	415	PUTBACK;
341	}	416	}
342	}	417	}
343		418
344	static void	419	static void
345	save_state(Coro__State c, int flags)	420	save_perl (pTHX_ Coro__State c)
346	{	421	{
347	{	422	{
348	dSP;	423	dSP;
349	I32 cxix = cxstack_ix;	424	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	425	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	428	/*
354	* the worst thing you can imagine happens first - we have to save	429	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	430	* (and reinitialize) all cv's in the whole callchain :(
356	*/	431	*/
357		432
358	PUSHs (Nullsv);	433	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	434	/* this loop was inspired by pp_caller */
360	for (;;)	435	for (;;)
361	{	436	{
362	while (cxix >= 0)	437	while (cxix >= 0)
363	{	438	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	439	PERL_CONTEXT *cx = &ccstk[cxix--];
365		440
366	if (CxTYPE(cx) == CXt_SUB)	441	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	442	{
368	CV *cv = cx->blk_sub.cv;	443	CV *cv = cx->blk_sub.cv;
		444
369	if (CvDEPTH(cv))	445	if (CvDEPTH (cv))
370	{	446	{
371	EXTEND (SP, CvDEPTH(cv)*2);	447	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	448	PUSHs ((SV *)CvPADLIST (cv));
		449	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	450	PUSHs ((SV *)cv);
382		451
		452	CvDEPTH (cv) = 0;
383	get_padlist (cv);	453	get_padlist (aTHX_ cv);
384	}	454	}
385	}	455	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	456	}
395		457
396	if (top_si->si_type == PERLSI_MAIN)	458	if (top_si->si_type == PERLSI_MAIN)
397	break;	459	break;
398		460
399	top_si = top_si->si_prev;	461	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	462	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	463	cxix = top_si->si_cxix;
402	}	464	}
403		465
404	PUTBACK;	466	PUTBACK;
405	}	467	}
406		468
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	469	c->defav = GvAV (PL_defgv);
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	470	c->defsv = DEFSV;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	471	c->errsv = ERRSV;
		472	c->irssv_sv = GvSV (irsgv);
410		473
411	c->dowarn = PL_dowarn;	474	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	475	# include "state.h"
413		476	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	477	}
445		478
446	/*	479	/*
447	* allocate various perl stacks. This is an exact copy	480	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	481	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	482	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	483	* not usually need a lot of stackspace.
451	*/	484	*/
		485	#if CORO_PREFER_PERL_FUNCTIONS
		486	# define coro_init_stacks init_stacks
		487	#else
452	static void	488	static void
453	coro_init_stacks ()	489	coro_init_stacks (pTHX)
454	{	490	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	491	PL_curstackinfo = new_stackinfo(64, 6);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	492	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	493	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	494	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		495
460	PL_stack_base = AvARRAY(PL_curstack);	496	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	497	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	498	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		499
464	New(50,PL_tmps_stack,96,SV*);	500	New(50,PL_tmps_stack,64,SV*);
465	PL_tmps_floor = -1;	501	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	502	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	503	PL_tmps_max = 64;
468		504
469	New(54,PL_markstack,16,I32);	505	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	506	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	507	PL_markstack_max = PL_markstack + 16;
472		508
…		…
476		512
477	New(54,PL_scopestack,16,I32);	513	New(54,PL_scopestack,16,I32);
478	PL_scopestack_ix = 0;	514	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	515	PL_scopestack_max = 16;
480		516
481	New(54,PL_savestack,96,ANY);	517	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	518	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	519	PL_savestack_max = 64;
484		520
485	#if !PERL_VERSION_ATLEAST (5,9,0)	521	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	522	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	523	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	524	PL_retstack_max = 4;
489	#endif	525	#endif
490	}	526	}
		527	#endif
491		528
492	/*	529	/*
493	* destroy the stacks, the callchain etc...	530	* destroy the stacks, the callchain etc...
494	*/	531	*/
495	static void	532	static void
496	coro_destroy_stacks()	533	coro_destroy_stacks (pTHX)
497	{	534	{
498	if (!IN_DESTRUCT)
499	{
500	/* is this ugly, I ask? */
501	LEAVE_SCOPE (0);
502
503	/* sure it is, but more important: is it correct?? :/ */
504	FREETMPS;
505
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507	}
508
509	while (PL_curstackinfo->si_next)	535	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	536	PL_curstackinfo = PL_curstackinfo->si_next;
511		537
512	while (PL_curstackinfo)	538	while (PL_curstackinfo)
513	{	539	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	540	PERL_SI *p = PL_curstackinfo->si_prev;
515		541
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	542	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	543	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		544
528	Safefree (PL_curstackinfo->si_cxstack);	545	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	546	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	547	PL_curstackinfo = p;
531	}	548	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	554	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	555	Safefree (PL_retstack);
539	#endif	556	#endif
540	}	557	}
541		558
542	static void	559	static size_t
543	setup_coro (struct coro *coro)	560	coro_rss (pTHX_ struct coro *coro)
		561	{
		562	size_t rss = sizeof (*coro);
		563
		564	if (coro->mainstack)
		565	{
		566	if (coro->flags & CF_RUNNING)
		567	{
		568	#define VAR(name,type)coro->name = PL_ ## name;
		569	# include "state.h"
		570	#undef VAR
		571	}
		572
		573	rss += sizeof (coro->curstackinfo);
		574	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		575	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		576	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		577	rss += coro->tmps_max * sizeof (SV *);
		578	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		579	rss += coro->scopestack_max * sizeof (I32);
		580	rss += coro->savestack_max * sizeof (ANY);
		581
		582	#if !PERL_VERSION_ATLEAST (5,9,0)
		583	rss += coro->retstack_max * sizeof (OP *);
		584	#endif
		585	}
		586
		587	return rss;
		588	}
		589
		590	/** coroutine stack handling ************************************************/
		591
		592	static void
		593	coro_setup (pTHX_ struct coro *coro)
544	{	594	{
545	/*	595	/*
546	* emulate part of the perl startup here.	596	* emulate part of the perl startup here.
547	*/	597	*/
548
549	coro_init_stacks ();	598	coro_init_stacks (aTHX);
550		599
		600	PL_runops = RUNOPS_DEFAULT;
		601	PL_curcop = &PL_compiling;
		602	PL_in_eval = EVAL_NULL;
551	PL_curcop = 0;	603	PL_comppad = 0;
552	PL_in_eval = 0;
553	PL_curpm = 0;	604	PL_curpm = 0;
		605	PL_localizing = 0;
		606	PL_dirty = 0;
		607	PL_restartop = 0;
		608
		609	GvSV (PL_defgv) = NEWSV (0, 0);
		610	GvAV (PL_defgv) = coro->args; coro->args = 0;
		611	GvSV (PL_errgv) = NEWSV (0, 0);
		612	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		613	PL_rs = newSVsv (GvSV (irsgv));
		614	PL_defoutgv = SvREFCNT_inc (stdoutgv);
554		615
555	{	616	{
556	dSP;	617	dSP;
557	LOGOP myop;	618	LOGOP myop;
558		619
559	/* I have no idea why this is needed, but it is */
560	PUSHMARK (SP);
561
562	SvREFCNT_dec (GvAV (PL_defgv));
563	GvAV (PL_defgv) = coro->args; coro->args = 0;
564
565	Zero (&myop, 1, LOGOP);	620	Zero (&myop, 1, LOGOP);
566	myop.op_next = Nullop;	621	myop.op_next = Nullop;
567	myop.op_flags = OPf_WANT_VOID;	622	myop.op_flags = OPf_WANT_VOID;
568		623
		624	PUSHMARK (SP);
		625	XPUSHs (av_shift (GvAV (PL_defgv)));
		626	PUTBACK;
569	PL_op = (OP *)&myop;	627	PL_op = (OP *)&myop;
570
571	PUSHMARK (SP);
572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573	PUTBACK;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	628	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	629	SPAGAIN;
576
577	ENTER; /* necessary e.g. for dounwind */
578	}	630	}
579	}
580		631
		632	ENTER; /* necessary e.g. for dounwind */
		633	}
		634
581	static void	635	static void
		636	coro_destroy (pTHX_ struct coro *coro)
		637	{
		638	if (!IN_DESTRUCT)
		639	{
		640	/* restore all saved variables and stuff */
		641	LEAVE_SCOPE (0);
		642	assert (PL_tmps_floor == -1);
		643
		644	/* free all temporaries */
		645	FREETMPS;
		646	assert (PL_tmps_ix == -1);
		647
		648	/* unwind all extra stacks */
		649	POPSTACK_TO (PL_mainstack);
		650
		651	/* unwind main stack */
		652	dounwind (-1);
		653	}
		654
		655	SvREFCNT_dec (GvSV (PL_defgv));
		656	SvREFCNT_dec (GvAV (PL_defgv));
		657	SvREFCNT_dec (GvSV (PL_errgv));
		658	SvREFCNT_dec (PL_defoutgv);
		659	SvREFCNT_dec (PL_rs);
		660	SvREFCNT_dec (GvSV (irsgv));
		661
		662	SvREFCNT_dec (coro->saved_deffh);
		663	//SvREFCNT_dec (coro->throw);
		664
		665	coro_destroy_stacks (aTHX);
		666	}
		667
		668	static void
582	free_coro_mortal ()	669	free_coro_mortal (pTHX)
583	{	670	{
584	if (coro_mortal)	671	if (coro_mortal)
585	{	672	{
586	SvREFCNT_dec (coro_mortal);	673	SvREFCNT_dec (coro_mortal);
587	coro_mortal = 0;	674	coro_mortal = 0;
588	}	675	}
589	}	676	}
590		677
		678	static int
		679	runops_trace (pTHX)
		680	{
		681	COP *oldcop = 0;
		682	int oldcxix = -2;
		683	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		684	coro_cctx *cctx = coro->cctx;
		685
		686	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		687	{
		688	PERL_ASYNC_CHECK ();
		689
		690	if (cctx->flags & CC_TRACE_ALL)
		691	{
		692	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		693	{
		694	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		695	SV **bot, **top;
		696	AV *av = newAV (); /* return values */
		697	SV **cb;
		698	dSP;
		699
		700	GV *gv = CvGV (cx->blk_sub.cv);
		701	SV *fullname = sv_2mortal (newSV (0));
		702	if (isGV (gv))
		703	gv_efullname3 (fullname, gv, 0);
		704
		705	bot = PL_stack_base + cx->blk_oldsp + 1;
		706	top = cx->blk_gimme == G_ARRAY ? SP + 1
		707	: cx->blk_gimme == G_SCALAR ? bot + 1
		708	: bot;
		709
		710	while (bot < top)
		711	av_push (av, SvREFCNT_inc (*bot++));
		712
		713	PL_runops = RUNOPS_DEFAULT;
		714	ENTER;
		715	SAVETMPS;
		716	EXTEND (SP, 3);
		717	PUSHMARK (SP);
		718	PUSHs (&PL_sv_no);
		719	PUSHs (fullname);
		720	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		721	PUTBACK;
		722	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		723	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		724	SPAGAIN;
		725	FREETMPS;
		726	LEAVE;
		727	PL_runops = runops_trace;
		728	}
		729
		730	if (oldcop != PL_curcop)
		731	{
		732	oldcop = PL_curcop;
		733
		734	if (PL_curcop != &PL_compiling)
		735	{
		736	SV **cb;
		737
		738	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		739	{
		740	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		741
		742	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		743	{
		744	runops_proc_t old_runops = PL_runops;
		745	dSP;
		746	GV *gv = CvGV (cx->blk_sub.cv);
		747	SV *fullname = sv_2mortal (newSV (0));
		748
		749	if (isGV (gv))
		750	gv_efullname3 (fullname, gv, 0);
		751
		752	PL_runops = RUNOPS_DEFAULT;
		753	ENTER;
		754	SAVETMPS;
		755	EXTEND (SP, 3);
		756	PUSHMARK (SP);
		757	PUSHs (&PL_sv_yes);
		758	PUSHs (fullname);
		759	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		760	PUTBACK;
		761	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		762	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		763	SPAGAIN;
		764	FREETMPS;
		765	LEAVE;
		766	PL_runops = runops_trace;
		767	}
		768
		769	oldcxix = cxstack_ix;
		770	}
		771
		772	if (cctx->flags & CC_TRACE_LINE)
		773	{
		774	dSP;
		775
		776	PL_runops = RUNOPS_DEFAULT;
		777	ENTER;
		778	SAVETMPS;
		779	EXTEND (SP, 3);
		780	PL_runops = RUNOPS_DEFAULT;
		781	PUSHMARK (SP);
		782	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		783	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		784	PUTBACK;
		785	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		786	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		787	SPAGAIN;
		788	FREETMPS;
		789	LEAVE;
		790	PL_runops = runops_trace;
		791	}
		792	}
		793	}
		794	}
		795	}
		796
		797	TAINT_NOT;
		798	return 0;
		799	}
		800
		801	/* inject a fake call to Coro::State::_cctx_init into the execution */
		802	/* _cctx_init should be careful, as it could be called at almost any time */
		803	/* during execution of a perl program */
591	static void NOINLINE	804	static void NOINLINE
592	prepare_cctx (coro_stack *cctx)	805	prepare_cctx (pTHX_ coro_cctx *cctx)
593	{	806	{
594	dSP;	807	dSP;
595	LOGOP myop;	808	LOGOP myop;
596		809
		810	PL_top_env = &PL_start_env;
		811
		812	if (cctx->flags & CC_TRACE)
		813	PL_runops = runops_trace;
		814
597	Zero (&myop, 1, LOGOP);	815	Zero (&myop, 1, LOGOP);
598	myop.op_next = PL_op;	816	myop.op_next = PL_op;
599	myop.op_flags = OPf_WANT_VOID;	817	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602		818
603	PUSHMARK (SP);	819	PUSHMARK (SP);
		820	EXTEND (SP, 2);
		821	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	822	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605	PUTBACK;	823	PUTBACK;
		824	PL_op = (OP *)&myop;
606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	825	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	826	SPAGAIN;
608	}	827	}
609		828
		829	/*
		830	* this is a _very_ stripped down perl interpreter ;)
		831	*/
610	static void	832	static void
611	coro_run (void *arg)	833	coro_run (void *arg)
612	{	834	{
		835	dTHX;
		836
613	/* coro_run is the alternative epilogue of transfer() */	837	/* coro_run is the alternative tail of transfer(), so unlock here. */
614	UNLOCK;	838	UNLOCK;
615		839
		840	/* we now skip the entersub that lead to transfer() */
		841	PL_op = PL_op->op_next;
		842
		843	/* inject a fake subroutine call to cctx_init */
		844	prepare_cctx (aTHX_ (coro_cctx *)arg);
		845
		846	/* somebody or something will hit me for both perl_run and PL_restartop */
		847	PL_restartop = PL_op;
		848	perl_run (PL_curinterp);
		849
616	/*	850	/*
617	* this is a _very_ stripped down perl interpreter ;)	851	* If perl-run returns we assume exit() was being called or the coro
		852	* fell off the end, which seems to be the only valid (non-bug)
		853	* reason for perl_run to return. We try to exit by jumping to the
		854	* bootstrap-time "top" top_env, as we cannot restore the "main"
		855	* coroutine as Coro has no such concept
618	*/	856	*/
619	PL_top_env = &PL_start_env;	857	PL_top_env = main_top_env;
620	/* inject call to cctx_init */	858	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	prepare_cctx ((coro_stack *)arg);
622
623	/* somebody will hit me for both perl_run and PL_restartop */
624	perl_run (PL_curinterp);
625
626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
627	abort ();
628	}	859	}
629		860
630	static coro_stack *	861	static coro_cctx *
631	stack_new ()	862	cctx_new ()
632	{	863	{
633	coro_stack *stack;	864	coro_cctx *cctx;
		865	void *stack_start;
		866	size_t stack_size;
634		867
		868	++cctx_count;
		869
635	New (0, stack, 1, coro_stack);	870	Newz (0, cctx, 1, coro_cctx);
636		871
637	#if HAVE_MMAP	872	#if HAVE_MMAP
638		873
639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	874	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap suppsedly does allocate-on-write for us */	875	/* mmap supposedly does allocate-on-write for us */
641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	876	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642		877
643	if (stack->sptr == (void *)-1)	878	if (cctx->sptr != (void *)-1)
644	{
645	perror ("FATAL: unable to mmap stack for coroutine");
646	_exit (EXIT_FAILURE);
647	}	879	{
648
649	# if STACKGUARD	880	# if CORO_STACKGUARD
650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	881	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651	# endif	882	# endif
652		883	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
653	#else	884	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654		885	cctx->flags |= CC_MAPPED;
655	stack->ssize = STACKSIZE * (long)sizeof (long);
656	New (0, stack->sptr, STACKSIZE, long);
657
658	if (!stack->sptr)
659	{	886	}
		887	else
		888	#endif
		889	{
		890	cctx->ssize = coro_stacksize * (long)sizeof (long);
		891	New (0, cctx->sptr, coro_stacksize, long);
		892
		893	if (!cctx->sptr)
		894	{
660	perror (stderr, "FATAL: unable to malloc stack for coroutine");	895	perror ("FATAL: unable to allocate stack for coroutine");
661	_exit (EXIT_FAILURE);	896	_exit (EXIT_FAILURE);
662	}	897	}
663		898
664	#endif	899	stack_start = cctx->sptr;
		900	stack_size = cctx->ssize;
		901	}
665		902
		903	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	904	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667		905
668	return stack;	906	return cctx;
669	}	907	}
670		908
671	static void	909	static void
672	stack_free (coro_stack *stack)	910	cctx_destroy (coro_cctx *cctx)
673	{	911	{
674	if (!stack)	912	if (!cctx)
675	return;	913	return;
676		914
		915	--cctx_count;
		916
		917	#if CORO_USE_VALGRIND
		918	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		919	#endif
		920
677	#if HAVE_MMAP	921	#if HAVE_MMAP
		922	if (cctx->flags & CC_MAPPED)
678	munmap (stack->sptr, stack->ssize);	923	munmap (cctx->sptr, cctx->ssize);
679	#else	924	else
		925	#endif
680	Safefree (stack->sptr);	926	Safefree (cctx->sptr);
681	#endif
682		927
683	Safefree (stack);	928	Safefree (cctx);
684	}	929	}
685		930
686	static coro_stack *stack_first;
687	static int cctx_count, cctx_idle;
688
689	static coro_stack *	931	static coro_cctx *
690	stack_get ()	932	cctx_get (pTHX)
691	{	933	{
692	coro_stack *stack;	934	while (cctx_first)
693
694	if (stack_first)
695	{	935	{
		936	coro_cctx *cctx = cctx_first;
		937	cctx_first = cctx->next;
696	--cctx_idle;	938	--cctx_idle;
697	stack = stack_first;	939
698	stack_first = stack->next;	940	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
699	}	941	return cctx;
700	else	942
701	{	943	cctx_destroy (cctx);
702	++cctx_count;
703	stack = stack_new ();
704	PL_op = PL_op->op_next;
705	}	944	}
706		945
707	return stack;	946	return cctx_new ();
708	}	947	}
709		948
710	static void	949	static void
711	stack_put (coro_stack *stack)	950	cctx_put (coro_cctx *cctx)
712	{	951	{
		952	/* free another cctx if overlimit */
		953	if (cctx_idle >= MAX_IDLE_CCTX)
		954	{
		955	coro_cctx *first = cctx_first;
		956	cctx_first = first->next;
		957	--cctx_idle;
		958
		959	cctx_destroy (first);
		960	}
		961
713	++cctx_idle;	962	++cctx_idle;
714	stack->next = stack_first;	963	cctx->next = cctx_first;
715	stack_first = stack;	964	cctx_first = cctx;
716	}	965	}
717		966
718	/* never call directly, always through the coro_state_transfer global variable */	967	/** coroutine switching *****************************************************/
		968
719	static void NOINLINE	969	static void NOINLINE
		970	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		971	{
		972	if (prev != next)
		973	{
		974	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		975	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		976
		977	if (next->flags & CF_RUNNING)
		978	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		979
		980	if (next->flags & CF_DESTROYED)
		981	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		982
		983	if (PL_lex_state != LEX_NOTPARSING)
		984	croak ("Coro::State::transfer called while parsing, but this is not supported");
		985	}
		986	}
		987
		988	/* always use the TRANSFER macro */
		989	static void NOINLINE
720	transfer (struct coro *prev, struct coro *next, int flags)	990	transfer (pTHX_ struct coro *prev, struct coro *next)
721	{	991	{
722	dSTACKLEVEL;	992	dSTACKLEVEL;
723		993
724	/* sometimes transfer is only called to set idle_sp */	994	/* sometimes transfer is only called to set idle_sp */
725	if (flags == TRANSFER_SET_STACKLEVEL)	995	if (!next)
		996	{
726	((coro_stack *)prev)->idle_sp = STACKLEVEL;	997	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		998	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		999	}
727	else if (prev != next)	1000	else if (prev != next)
728	{	1001	{
729	coro_stack *prev__stack;	1002	coro_cctx *prev__cctx;
		1003
		1004	if (prev->flags & CF_NEW)
		1005	{
		1006	/* create a new empty context */
		1007	Newz (0, prev->cctx, 1, coro_cctx);
		1008	prev->flags &= ~CF_NEW;
		1009	prev->flags |= CF_RUNNING;
		1010	}
		1011
		1012	prev->flags &= ~CF_RUNNING;
		1013	next->flags |= CF_RUNNING;
730		1014
731	LOCK;	1015	LOCK;
732		1016
733	if (next->mainstack)	1017	if (next->flags & CF_NEW)
734	{	1018	{
735	/* coroutine already started */	1019	/* need to start coroutine */
736	SAVE (prev, flags);	1020	next->flags &= ~CF_NEW;
737	LOAD (next);	1021	/* first get rid of the old state */
		1022	save_perl (aTHX_ prev);
		1023	/* setup coroutine call */
		1024	coro_setup (aTHX_ next);
738	}	1025	}
739	else	1026	else
740	{	1027	{
741	/* need to start coroutine */	1028	/* coroutine already started */
742	/* first get rid of the old state */	1029	save_perl (aTHX_ prev);
743	SAVE (prev, -1);	1030	load_perl (aTHX_ next);
744	/* setup coroutine call */
745	setup_coro (next);
746	/* need a stack */
747	next->stack = 0;
748	}	1031	}
749		1032
750	if (!prev->stack)
751	/* create a new empty context */
752	Newz (0, prev->stack, 1, coro_stack);
753
754	prev__stack = prev->stack;	1033	prev__cctx = prev->cctx;
755		1034
756	/* possibly "free" the stack */	1035	/* possibly "free" the cctx */
757	if (prev__stack->idle_sp == STACKLEVEL)	1036	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
758	{	1037	{
759	stack_put (prev__stack);	1038	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1039	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1040
760	prev->stack = 0;	1041	prev->cctx = 0;
		1042
		1043	cctx_put (prev__cctx);
761	}	1044	}
762		1045
		1046	++next->usecount;
		1047
763	if (!next->stack)	1048	if (!next->cctx)
764	next->stack = stack_get ();	1049	next->cctx = cctx_get (aTHX);
765		1050
766	if (prev__stack != next->stack)	1051	if (prev__cctx != next->cctx)
767	{	1052	{
768	prev__stack->top_env = PL_top_env;	1053	prev__cctx->top_env = PL_top_env;
769	PL_top_env = next->stack->top_env;	1054	PL_top_env = next->cctx->top_env;
770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1055	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
771	}	1056	}
772		1057
773	free_coro_mortal ();	1058	free_coro_mortal (aTHX);
774
775	UNLOCK;	1059	UNLOCK;
776	}	1060	}
777	}	1061	}
778		1062
779	struct transfer_args	1063	struct transfer_args
780	{	1064	{
781	struct coro *prev, *next;	1065	struct coro *prev, *next;
782	int flags;
783	};	1066	};
784		1067
785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1068	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1069	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
786		1070
		1071	/** high level stuff ********************************************************/
		1072
787	static void	1073	static int
788	coro_state_destroy (struct coro *coro)	1074	coro_state_destroy (pTHX_ struct coro *coro)
789	{	1075	{
790	if (coro->refcnt--)	1076	if (coro->flags & CF_DESTROYED)
791	return;	1077	return 0;
		1078
		1079	coro->flags |= CF_DESTROYED;
		1080
		1081	if (coro->flags & CF_READY)
		1082	{
		1083	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1084	/* alternative: look through all ready queues and remove the coro */
		1085	LOCK;
		1086	--coro_nready;
		1087	UNLOCK;
		1088	}
		1089	else
		1090	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
792		1091
793	if (coro->mainstack && coro->mainstack != main_mainstack)	1092	if (coro->mainstack && coro->mainstack != main_mainstack)
794	{	1093	{
795	struct coro temp;	1094	struct coro temp;
796		1095
797	SAVE ((&temp), TRANSFER_SAVE_ALL);	1096	if (coro->flags & CF_RUNNING)
798	LOAD (coro);	1097	croak ("FATAL: tried to destroy currently running coroutine");
799		1098
800	coro_destroy_stacks ();	1099	save_perl (aTHX_ &temp);
		1100	load_perl (aTHX_ coro);
801		1101
		1102	coro_destroy (aTHX_ coro);
		1103
802	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1104	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
803		1105
804	coro->mainstack = 0;	1106	coro->mainstack = 0;
805	}	1107	}
806		1108
807	stack_free (coro->stack);	1109	cctx_destroy (coro->cctx);
808	SvREFCNT_dec (coro->args);	1110	SvREFCNT_dec (coro->args);
809	Safefree (coro);	1111
		1112	if (coro->next) coro->next->prev = coro->prev;
		1113	if (coro->prev) coro->prev->next = coro->next;
		1114	if (coro == coro_first) coro_first = coro->next;
		1115
		1116	return 1;
810	}	1117	}
811		1118
812	static int	1119	static int
813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1120	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814	{	1121	{
815	struct coro *coro = (struct coro *)mg->mg_ptr;	1122	struct coro *coro = (struct coro *)mg->mg_ptr;
816	mg->mg_ptr = 0;	1123	mg->mg_ptr = 0;
817		1124
		1125	coro->hv = 0;
		1126
		1127	if (--coro->refcnt < 0)
		1128	{
818	coro_state_destroy (coro);	1129	coro_state_destroy (aTHX_ coro);
		1130	Safefree (coro);
		1131	}
819		1132
820	return 0;	1133	return 0;
821	}	1134	}
822		1135
823	static int	1136	static int
…		…
830	return 0;	1143	return 0;
831	}	1144	}
832		1145
833	static MGVTBL coro_state_vtbl = {	1146	static MGVTBL coro_state_vtbl = {
834	0, 0, 0, 0,	1147	0, 0, 0, 0,
835	coro_state_clear,	1148	coro_state_free,
836	0,	1149	0,
837	#ifdef MGf_DUP	1150	#ifdef MGf_DUP
838	coro_state_dup,	1151	coro_state_dup,
839	#else	1152	#else
840	# define MGf_DUP 0	1153	# define MGf_DUP 0
841	#endif	1154	#endif
842	};	1155	};
843		1156
844	static struct coro *
845	SvSTATE (SV *coro)
846	{
847	HV *stash;
848	MAGIC *mg;
849
850	if (SvROK (coro))
851	coro = SvRV (coro);
852
853	stash = SvSTASH (coro);
854	if (stash != coro_stash && stash != coro_state_stash)
855	{
856	/* very slow, but rare, check */
857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858	croak ("Coro::State object required");
859	}
860
861	mg = SvMAGIC (coro);
862	assert (mg->mg_type == PERL_MAGIC_ext);
863	return (struct coro *)mg->mg_ptr;
864	}
865
866	static void	1157	static void
867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1158	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868	{	1159	{
869	ta->prev = SvSTATE (prev);	1160	ta->prev = SvSTATE (prev_sv);
870	ta->next = SvSTATE (next);	1161	ta->next = SvSTATE (next_sv);
871	ta->flags = flags;	1162	TRANSFER_CHECK (*ta);
872	}	1163	}
873		1164
874	static void	1165	static void
875	api_transfer (SV *prev, SV *next, int flags)	1166	api_transfer (SV *prev_sv, SV *next_sv)
876	{	1167	{
877	dTHX;	1168	dTHX;
878	struct transfer_args ta;	1169	struct transfer_args ta;
879		1170
880	prepare_transfer (&ta, prev, next, flags);	1171	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1172	TRANSFER (ta);
882	}	1173	}
883		1174
884	/** Coro ********************************************************************/	1175	/** Coro ********************************************************************/
885		1176
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static GV *coro_current, *coro_idle;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1177	static void
899	coro_enq (SV *sv)	1178	coro_enq (pTHX_ SV *coro_sv)
900	{	1179	{
901	int prio;
902
903	if (SvTYPE (sv) != SVt_PVHV)
904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906	prio = SvSTATE (sv)->prio;
907
908	av_push (coro_ready [prio - PRIO_MIN], sv);	1180	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
909	coro_nready++;
910	}	1181	}
911		1182
912	static SV *	1183	static SV *
913	coro_deq (int min_prio)	1184	coro_deq (pTHX_ int min_prio)
914	{	1185	{
915	int prio = PRIO_MAX - PRIO_MIN;	1186	int prio = PRIO_MAX - PRIO_MIN;
916		1187
917	min_prio -= PRIO_MIN;	1188	min_prio -= PRIO_MIN;
918	if (min_prio < 0)	1189	if (min_prio < 0)
919	min_prio = 0;	1190	min_prio = 0;
920		1191
921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1192	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
922	if (AvFILLp (coro_ready [prio]) >= 0)	1193	if (AvFILLp (coro_ready [prio]) >= 0)
923	{
924	coro_nready--;
925	return av_shift (coro_ready [prio]);	1194	return av_shift (coro_ready [prio]);
926	}
927		1195
928	return 0;	1196	return 0;
929	}	1197	}
930		1198
931	static void	1199	static int
932	api_ready (SV *coro)	1200	api_ready (SV *coro_sv)
933	{	1201	{
934	dTHX;	1202	dTHX;
		1203	struct coro *coro;
935		1204
936	if (SvROK (coro))	1205	if (SvROK (coro_sv))
937	coro = SvRV (coro);	1206	coro_sv = SvRV (coro_sv);
		1207
		1208	coro = SvSTATE (coro_sv);
		1209
		1210	if (coro->flags & CF_READY)
		1211	return 0;
		1212
		1213	coro->flags |= CF_READY;
938		1214
939	LOCK;	1215	LOCK;
940	coro_enq (SvREFCNT_inc (coro));	1216	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1217	++coro_nready;
941	UNLOCK;	1218	UNLOCK;
942	}
943		1219
		1220	return 1;
		1221	}
		1222
944	static void	1223	static int
		1224	api_is_ready (SV *coro_sv)
		1225	{
		1226	dTHX;
		1227	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1228	}
		1229
		1230	static void
945	prepare_schedule (struct transfer_args *ta)	1231	prepare_schedule (pTHX_ struct transfer_args *ta)
946	{	1232	{
947	SV *current, *prev, *next;	1233	SV *prev_sv, *next_sv;
948
949	current = GvSV (coro_current);
950		1234
951	for (;;)	1235	for (;;)
952	{	1236	{
953	LOCK;	1237	LOCK;
954	next = coro_deq (PRIO_MIN);	1238	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1239
		1240	/* nothing to schedule: call the idle handler */
		1241	if (!next_sv)
		1242	{
		1243	dSP;
		1244	UNLOCK;
		1245
		1246	ENTER;
		1247	SAVETMPS;
		1248
		1249	PUSHMARK (SP);
		1250	PUTBACK;
		1251	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1252
		1253	FREETMPS;
		1254	LEAVE;
		1255	continue;
		1256	}
		1257
		1258	ta->next = SvSTATE (next_sv);
		1259
		1260	/* cannot transfer to destroyed coros, skip and look for next */
		1261	if (ta->next->flags & CF_DESTROYED)
		1262	{
		1263	UNLOCK;
		1264	SvREFCNT_dec (next_sv);
		1265	/* coro_nready is already taken care of by destroy */
		1266	continue;
		1267	}
		1268
		1269	--coro_nready;
955	UNLOCK;	1270	UNLOCK;
956
957	if (next)
958	break;	1271	break;
959
960	{
961	dSP;
962
963	ENTER;
964	SAVETMPS;
965
966	PUSHMARK (SP);
967	PUTBACK;
968	call_sv (GvSV (coro_idle), G_DISCARD);
969
970	FREETMPS;
971	LEAVE;
972	}	1272	}
973	}
974
975	prev = SvRV (current);
976	SvRV (current) = next;
977		1273
978	/* free this only after the transfer */	1274	/* free this only after the transfer */
		1275	prev_sv = SvRV (coro_current);
		1276	ta->prev = SvSTATE (prev_sv);
		1277	TRANSFER_CHECK (*ta);
		1278	assert (ta->next->flags & CF_READY);
		1279	ta->next->flags &= ~CF_READY;
		1280	SvRV_set (coro_current, next_sv);
		1281
979	LOCK;	1282	LOCK;
980	free_coro_mortal ();	1283	free_coro_mortal (aTHX);
		1284	coro_mortal = prev_sv;
981	UNLOCK;	1285	UNLOCK;
982	coro_mortal = prev;
983
984	ta->prev = SvSTATE (prev);
985	ta->next = SvSTATE (next);
986	ta->flags = TRANSFER_SAVE_ALL;
987	}	1286	}
988		1287
989	static void	1288	static void
990	prepare_cede (struct transfer_args *ta)	1289	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1290	{
992	LOCK;	1291	api_ready (coro_current);
993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994	UNLOCK;
995
996	prepare_schedule (ta);	1292	prepare_schedule (aTHX_ ta);
		1293	}
		1294
		1295	static int
		1296	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1297	{
		1298	if (coro_nready)
		1299	{
		1300	SV *prev = SvRV (coro_current);
		1301	prepare_schedule (aTHX_ ta);
		1302	api_ready (prev);
		1303	return 1;
		1304	}
		1305	else
		1306	return 0;
997	}	1307	}
998		1308
999	static void	1309	static void
1000	api_schedule (void)	1310	api_schedule (void)
1001	{	1311	{
1002	dTHX;	1312	dTHX;
1003	struct transfer_args ta;	1313	struct transfer_args ta;
1004		1314
1005	prepare_schedule (&ta);	1315	prepare_schedule (aTHX_ &ta);
1006	TRANSFER (ta);	1316	TRANSFER (ta);
1007	}	1317	}
1008		1318
1009	static void	1319	static int
1010	api_cede (void)	1320	api_cede (void)
1011	{	1321	{
1012	dTHX;	1322	dTHX;
1013	struct transfer_args ta;	1323	struct transfer_args ta;
1014		1324
1015	prepare_cede (&ta);	1325	prepare_cede (aTHX_ &ta);
		1326
		1327	if (ta.prev != ta.next)
		1328	{
1016	TRANSFER (ta);	1329	TRANSFER (ta);
		1330	return 1;
		1331	}
		1332	else
		1333	return 0;
1017	}	1334	}
1018		1335
		1336	static int
		1337	api_cede_notself (void)
		1338	{
		1339	dTHX;
		1340	struct transfer_args ta;
		1341
		1342	if (prepare_cede_notself (aTHX_ &ta))
		1343	{
		1344	TRANSFER (ta);
		1345	return 1;
		1346	}
		1347	else
		1348	return 0;
		1349	}
		1350
		1351	static void
		1352	api_trace (SV *coro_sv, int flags)
		1353	{
		1354	dTHX;
		1355	struct coro *coro = SvSTATE (coro_sv);
		1356
		1357	if (flags & CC_TRACE)
		1358	{
		1359	if (!coro->cctx)
		1360	coro->cctx = cctx_new ();
		1361	else if (!(coro->cctx->flags & CC_TRACE))
		1362	croak ("cannot enable tracing on coroutine with custom stack");
		1363
		1364	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1365	}
		1366	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1367	{
		1368	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1369
		1370	if (coro->flags & CF_RUNNING)
		1371	PL_runops = RUNOPS_DEFAULT;
		1372	else
		1373	coro->runops = RUNOPS_DEFAULT;
		1374	}
		1375	}
		1376
1019	MODULE = Coro::State PACKAGE = Coro::State	1377	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1020		1378
1021	PROTOTYPES: DISABLE	1379	PROTOTYPES: DISABLE
1022		1380
1023	BOOT:	1381	BOOT:
1024	{	1382	{
1025	#ifdef USE_ITHREADS	1383	#ifdef USE_ITHREADS
1026	MUTEX_INIT (&coro_mutex);	1384	MUTEX_INIT (&coro_mutex);
1027	#endif	1385	#endif
1028	BOOT_PAGESIZE;	1386	BOOT_PAGESIZE;
1029		1387
		1388	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1389	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1390
1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1391	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031		1392
1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1396	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1035		1397
1036	main_mainstack = PL_mainstack;	1398	main_mainstack = PL_mainstack;
		1399	main_top_env = PL_top_env;
		1400
		1401	while (main_top_env->je_prev)
		1402	main_top_env = main_top_env->je_prev;
1037		1403
1038	coroapi.ver = CORO_API_VERSION;	1404	coroapi.ver = CORO_API_VERSION;
1039	coroapi.transfer = api_transfer;	1405	coroapi.transfer = api_transfer;
1040		1406
1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1407	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1048	struct coro *coro;	1414	struct coro *coro;
1049	HV *hv;	1415	HV *hv;
1050	int i;	1416	int i;
1051		1417
1052	Newz (0, coro, 1, struct coro);	1418	Newz (0, coro, 1, struct coro);
1053	coro->args = newAV ();	1419	coro->args = newAV ();
		1420	coro->flags = CF_NEW;
1054		1421
		1422	if (coro_first) coro_first->prev = coro;
		1423	coro->next = coro_first;
		1424	coro_first = coro;
		1425
1055	hv = newHV ();	1426	coro->hv = hv = newHV ();
1056	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1427	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1428	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058		1429
1059	for (i = 1; i < items; i++)	1430	for (i = 1; i < items; i++)
1060	av_push (coro->args, newSVsv (ST (i)));	1431	av_push (coro->args, newSVsv (ST (i)));
1061
1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1063	/*coro->stack = 0;*/
1064	}	1432	}
1065	OUTPUT:	1433	OUTPUT:
1066	RETVAL	1434	RETVAL
1067		1435
		1436	# these not obviously related functions are all rolled into the same xs
		1437	# function to increase chances that they all will call transfer with the same
		1438	# stack offset
1068	void	1439	void
1069	_set_stacklevel (...)	1440	_set_stacklevel (...)
1070	ALIAS:	1441	ALIAS:
1071	Coro::State::transfer = 1	1442	Coro::State::transfer = 1
1072	Coro::schedule = 2	1443	Coro::schedule = 2
1073	Coro::cede = 3	1444	Coro::cede = 3
1074	Coro::Cont::yield = 4	1445	Coro::cede_notself = 4
1075	CODE:	1446	CODE:
1076	{	1447	{
1077	struct transfer_args ta;	1448	struct transfer_args ta;
1078		1449
1079	switch (ix)	1450	switch (ix)
1080	{	1451	{
1081	case 0:	1452	case 0:
1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1453	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083	ta.next = 0;	1454	ta.next = 0;
1084	ta.flags = TRANSFER_SET_STACKLEVEL;
1085	break;	1455	break;
1086		1456
1087	case 1:	1457	case 1:
1088	if (items != 3)	1458	if (items != 2)
1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1459	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090		1460
1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1461	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092	break;	1462	break;
1093		1463
1094	case 2:	1464	case 2:
1095	prepare_schedule (&ta);	1465	prepare_schedule (aTHX_ &ta);
1096	break;	1466	break;
1097		1467
1098	case 3:	1468	case 3:
1099	prepare_cede (&ta);	1469	prepare_cede (aTHX_ &ta);
1100	break;	1470	break;
1101		1471
1102	case 4:	1472	case 4:
1103	{	1473	if (!prepare_cede_notself (aTHX_ &ta))
1104	SV *yieldstack;	1474	XSRETURN_EMPTY;
1105	SV *sv;
1106	AV *defav = GvAV (PL_defgv);
1107		1475
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	ta.flags = 0;
1124	SvREFCNT_dec (sv);
1125	}
1126	break;	1476	break;
1127
1128	}	1477	}
1129		1478
		1479	BARRIER;
1130	TRANSFER (ta);	1480	TRANSFER (ta);
1131	}
1132		1481
1133	void	1482	if (GIMME_V != G_VOID && ta.next != ta.prev)
1134	_clone_state_from (SV *dst, SV *src)	1483	XSRETURN_YES;
		1484	}
		1485
		1486	bool
		1487	_destroy (SV *coro_sv)
1135	CODE:	1488	CODE:
1136	{	1489	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1137	struct coro *coro_src = SvSTATE (src);	1490	OUTPUT:
1138		1491	RETVAL
1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141	++coro_src->refcnt;
1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143	}
1144		1492
1145	void	1493	void
1146	_exit (code)	1494	_exit (code)
1147	int code	1495	int code
1148	PROTOTYPE: $	1496	PROTOTYPE: $
1149	CODE:	1497	CODE:
1150	_exit (code);	1498	_exit (code);
1151		1499
		1500	int
		1501	cctx_stacksize (int new_stacksize = 0)
		1502	CODE:
		1503	RETVAL = coro_stacksize;
		1504	if (new_stacksize)
		1505	coro_stacksize = new_stacksize;
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	int
		1510	cctx_count ()
		1511	CODE:
		1512	RETVAL = cctx_count;
		1513	OUTPUT:
		1514	RETVAL
		1515
		1516	int
		1517	cctx_idle ()
		1518	CODE:
		1519	RETVAL = cctx_idle;
		1520	OUTPUT:
		1521	RETVAL
		1522
		1523	void
		1524	list ()
		1525	PPCODE:
		1526	{
		1527	struct coro *coro;
		1528	for (coro = coro_first; coro; coro = coro->next)
		1529	if (coro->hv)
		1530	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1531	}
		1532
		1533	void
		1534	call (Coro::State coro, SV *coderef)
		1535	ALIAS:
		1536	eval = 1
		1537	CODE:
		1538	{
		1539	if (coro->mainstack)
		1540	{
		1541	struct coro temp;
		1542	Zero (&temp, 1, struct coro);
		1543
		1544	if (!(coro->flags & CF_RUNNING))
		1545	{
		1546	save_perl (aTHX_ &temp);
		1547	load_perl (aTHX_ coro);
		1548	}
		1549
		1550	{
		1551	dSP;
		1552	ENTER;
		1553	SAVETMPS;
		1554	PUSHMARK (SP);
		1555	PUTBACK;
		1556	if (ix)
		1557	eval_sv (coderef, 0);
		1558	else
		1559	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1560	SPAGAIN;
		1561	FREETMPS;
		1562	LEAVE;
		1563	PUTBACK;
		1564	}
		1565
		1566	if (!(coro->flags & CF_RUNNING))
		1567	{
		1568	save_perl (aTHX_ coro);
		1569	load_perl (aTHX_ &temp);
		1570	}
		1571	}
		1572	}
		1573
		1574	SV *
		1575	is_ready (Coro::State coro)
		1576	PROTOTYPE: $
		1577	ALIAS:
		1578	is_ready = CF_READY
		1579	is_running = CF_RUNNING
		1580	is_new = CF_NEW
		1581	is_destroyed = CF_DESTROYED
		1582	CODE:
		1583	RETVAL = boolSV (coro->flags & ix);
		1584	OUTPUT:
		1585	RETVAL
		1586
		1587	void
		1588	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1589
		1590	SV *
		1591	has_stack (Coro::State coro)
		1592	PROTOTYPE: $
		1593	CODE:
		1594	RETVAL = boolSV (!!coro->cctx);
		1595	OUTPUT:
		1596	RETVAL
		1597
		1598	int
		1599	is_traced (Coro::State coro)
		1600	PROTOTYPE: $
		1601	CODE:
		1602	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1603	OUTPUT:
		1604	RETVAL
		1605
		1606	IV
		1607	rss (Coro::State coro)
		1608	PROTOTYPE: $
		1609	ALIAS:
		1610	usecount = 1
		1611	CODE:
		1612	switch (ix)
		1613	{
		1614	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1615	case 1: RETVAL = coro->usecount; break;
		1616	}
		1617	OUTPUT:
		1618	RETVAL
		1619
		1620
1152	MODULE = Coro::State PACKAGE = Coro	1621	MODULE = Coro::State PACKAGE = Coro
1153		1622
1154	BOOT:	1623	BOOT:
1155	{	1624	{
1156	int i;	1625	int i;
		1626
		1627	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1628	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1629	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1630
		1631	coro_current = get_sv ("Coro::current", FALSE);
		1632	SvREADONLY_on (coro_current);
1157		1633
1158	coro_stash = gv_stashpv ("Coro", TRUE);	1634	coro_stash = gv_stashpv ("Coro", TRUE);
1159		1635
1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1636	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1637	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1638	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1639	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1640	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1641	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166		1642
1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1169
1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1643	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171	coro_ready[i] = newAV ();	1644	coro_ready[i] = newAV ();
1172		1645
1173	{	1646	{
1174	SV *sv = perl_get_sv("Coro::API", 1);	1647	SV *sv = perl_get_sv("Coro::API", 1);
1175		1648
1176	coroapi.schedule = api_schedule;	1649	coroapi.schedule = api_schedule;
1177	coroapi.cede = api_cede;	1650	coroapi.cede = api_cede;
		1651	coroapi.cede_notself = api_cede_notself;
1178	coroapi.ready = api_ready;	1652	coroapi.ready = api_ready;
		1653	coroapi.is_ready = api_is_ready;
1179	coroapi.nready = &coro_nready;	1654	coroapi.nready = &coro_nready;
1180	coroapi.current = coro_current;	1655	coroapi.current = coro_current;
1181		1656
1182	GCoroAPI = &coroapi;	1657	GCoroAPI = &coroapi;
1183	sv_setiv (sv, (IV)&coroapi);	1658	sv_setiv (sv, (IV)&coroapi);
1184	SvREADONLY_on (sv);	1659	SvREADONLY_on (sv);
1185	}	1660	}
1186	}	1661	}
		1662
		1663	void
		1664	_set_current (SV *current)
		1665	PROTOTYPE: $
		1666	CODE:
		1667	SvREFCNT_dec (SvRV (coro_current));
		1668	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1187		1669
1188	int	1670	int
1189	prio (Coro::State coro, int newprio = 0)	1671	prio (Coro::State coro, int newprio = 0)
1190	ALIAS:	1672	ALIAS:
1191	nice = 1	1673	nice = 1
…		…
1194	RETVAL = coro->prio;	1676	RETVAL = coro->prio;
1195		1677
1196	if (items > 1)	1678	if (items > 1)
1197	{	1679	{
1198	if (ix)	1680	if (ix)
1199	newprio += coro->prio;	1681	newprio = coro->prio - newprio;
1200		1682
1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1683	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1684	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203		1685
1204	coro->prio = newprio;	1686	coro->prio = newprio;
1205	}	1687	}
1206	}	1688	}
		1689	OUTPUT:
		1690	RETVAL
1207		1691
1208	void	1692	SV *
1209	ready (SV *self)	1693	ready (SV *self)
1210	PROTOTYPE: $	1694	PROTOTYPE: $
1211	CODE:	1695	CODE:
1212	api_ready (self);	1696	RETVAL = boolSV (api_ready (self));
		1697	OUTPUT:
		1698	RETVAL
1213		1699
1214	int	1700	int
1215	nready (...)	1701	nready (...)
1216	PROTOTYPE:	1702	PROTOTYPE:
1217	CODE:	1703	CODE:
1218	RETVAL = coro_nready;	1704	RETVAL = coro_nready;
1219	OUTPUT:	1705	OUTPUT:
1220	RETVAL	1706	RETVAL
1221		1707
		1708	# for async_pool speedup
		1709	void
		1710	_pool_1 (SV *cb)
		1711	CODE:
		1712	{
		1713	struct coro *coro = SvSTATE (coro_current);
		1714	HV *hv = (HV *)SvRV (coro_current);
		1715	AV *defav = GvAV (PL_defgv);
		1716	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1717	AV *invoke_av;
		1718	int i, len;
		1719
		1720	if (!invoke)
		1721	croak ("\3terminate\2\n");
		1722
		1723	SvREFCNT_dec (coro->saved_deffh);
		1724	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1725
		1726	hv_store (hv, "desc", sizeof ("desc") - 1,
		1727	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1728
		1729	invoke_av = (AV *)SvRV (invoke);
		1730	len = av_len (invoke_av);
		1731
		1732	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1733
		1734	if (len > 0)
		1735	{
		1736	av_fill (defav, len - 1);
		1737	for (i = 0; i < len; ++i)
		1738	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1739	}
		1740
		1741	SvREFCNT_dec (invoke);
		1742	}
		1743
		1744	void
		1745	_pool_2 (SV *cb)
		1746	CODE:
		1747	{
		1748	struct coro *coro = SvSTATE (coro_current);
		1749
		1750	sv_setsv (cb, &PL_sv_undef);
		1751
		1752	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1753	coro->saved_deffh = 0;
		1754
		1755	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1756	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1757	croak ("\3terminate\2\n");
		1758
		1759	av_clear (GvAV (PL_defgv));
		1760	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1761	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1762
		1763	coro->prio = 0;
		1764
		1765	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1766	api_trace (coro_current, 0);
		1767
		1768	av_push (av_async_pool, newSVsv (coro_current));
		1769	}
		1770
		1771
1222	MODULE = Coro::State PACKAGE = Coro::AIO	1772	MODULE = Coro::State PACKAGE = Coro::AIO
1223		1773
1224	SV *	1774	SV *
1225	_get_state ()	1775	_get_state ()
1226	CODE:	1776	CODE:
1227	{	1777	{
1228	struct {	1778	struct io_state *data;
1229	int errorno;
1230	int laststype;
1231	int laststatval;
1232	Stat_t statcache;
1233	} data;
1234		1779
		1780	RETVAL = newSV (sizeof (struct io_state));
		1781	data = (struct io_state *)SvPVX (RETVAL);
		1782	SvCUR_set (RETVAL, sizeof (struct io_state));
		1783	SvPOK_only (RETVAL);
		1784
1235	data.errorno = errno;	1785	data->errorno = errno;
1236	data.laststype = PL_laststype;	1786	data->laststype = PL_laststype;
1237	data.laststatval = PL_laststatval;	1787	data->laststatval = PL_laststatval;
1238	data.statcache = PL_statcache;	1788	data->statcache = PL_statcache;
1239
1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
1241	}	1789	}
1242	OUTPUT:	1790	OUTPUT:
1243	RETVAL	1791	RETVAL
1244		1792
1245	void	1793	void
1246	_set_state (char *data_)	1794	_set_state (char *data_)
1247	PROTOTYPE: $	1795	PROTOTYPE: $
1248	CODE:	1796	CODE:
1249	{	1797	{
1250	struct {	1798	struct io_state *data = (void *)data_;
1251	int errorno;
1252	int laststype;
1253	int laststatval;
1254	Stat_t statcache;
1255	} *data = (void *)data_;
1256		1799
1257	errno = data->errorno;	1800	errno = data->errorno;
1258	PL_laststype = data->laststype;	1801	PL_laststype = data->laststype;
1259	PL_laststatval = data->laststatval;	1802	PL_laststatval = data->laststatval;
1260	PL_statcache = data->statcache;	1803	PL_statcache = data->statcache;
1261	}	1804	}
		1805

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