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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.190 by root, Fri Oct 5 20:39:39 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
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
33		84
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	85	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	86	# 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	87	#endif
52	# include <limits.h>	88
53	# ifndef PAGESIZE	89	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	90	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	91	#endif
60	#endif
61		92
62	#define SUB_INIT "Coro::State::initialize"	93	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	94	#ifndef CORO_PREFER_PERL_FUNCTIONS
		95	# define CORO_PREFER_PERL_FUNCTIONS 0
		96	#endif
64		97
65	/* The next macro should declare a variable stacklevel that contains and approximation	98	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	99	* portable way as possible. */
67	* and should be unique. */	100	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	101	#define STACKLEVEL ((void *)&stacklevel)
69		102
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	103	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		104
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	105	#if __GNUC__ >= 3
		106	# define attribute(x) __attribute__(x)
		107	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		108	#else
		109	# define attribute(x)
		110	# define BARRIER
		111	#endif
		112
		113	#define NOINLINE attribute ((noinline))
73		114
74	#include "CoroAPI.h"	115	#include "CoroAPI.h"
75		116
76	#ifdef USE_ITHREADS	117	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	118	static perl_mutex coro_mutex;
…		…
80	#else	121	#else
81	# define LOCK (void)0	122	# define LOCK (void)0
82	# define UNLOCK (void)0	123	# define UNLOCK (void)0
83	#endif	124	#endif
84		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;
85	static struct CoroAPI coroapi;	136	static struct CoroAPI coroapi;
86	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;
87	static HV *coro_state_stash;	139	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	140	static SV *coro_mortal; /* will be freed after next transfer */
91		141
92	/* this is actually not only the c stack but also c registers etc... */	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
		162	/* this is a structure representing a c-level coroutine */
93	typedef struct {	163	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	164	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		165
		166	/* the stack */
		167	void *sptr;
		168	size_t ssize;
		169
		170	/* cpu state */
		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 */
		173	JMPENV *top_env;
98	coro_context cctx;	174	coro_context cctx;
99		175
100	void *sptr;	176	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	177	int valgrind_id;
102	} coro_stack;	178	#endif
		179	unsigned char flags;
		180	} coro_cctx;
103		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	};
		188
		189	/* this is a structure representing a perl-level coroutine */
104	struct coro {	190	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	191	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	192	coro_cctx *cctx;
107
108	/* the optional C context */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;
126	SV **stack_sp;
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		193
153	/* data associated with this coroutine (initial args) */	194	/* data associated with this coroutine (initial args) */
154	AV *args;	195	AV *args;
		196	int refcnt;
		197	int flags; /* CF_ flags */
		198
		199	/* optionally saved, might be zero */
		200	AV *defav; /* @_ */
		201	SV *defsv; /* $_ */
		202	SV *errsv; /* $@ */
		203	SV *deffh; /* default filehandle */
		204	SV *irssv; /* $/ */
		205	SV *irssv_sv; /* real $/ cache */
		206
		207	#define VAR(name,type) type name;
		208	# include "state.h"
		209	#undef VAR
		210
		211	/* statistics */
		212	int usecount; /* number of transfers to this coro */
		213
		214	/* coro process data */
		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 */
155	};	224	};
156		225
157	typedef struct coro *Coro__State;	226	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	227	typedef struct coro *Coro__State_or_hashref;
159		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
160	static AV *	246	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	247	coro_clone_padlist (pTHX_ CV *cv)
162	{	248	{
163	AV *padlist = CvPADLIST (cv);	249	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	250	AV *newpadlist, *newpad;
165		251
166	newpadlist = newAV ();	252	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	253	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	254	#if PERL_VERSION_ATLEAST (5,9,0)
		255	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		256	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	257	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	258	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	259	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	260	--AvFILLp (padlist);
175		261
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	262	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
220		306
221	#define PERL_MAGIC_coro PERL_MAGIC_ext	307	#define PERL_MAGIC_coro PERL_MAGIC_ext
222		308
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	309	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		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
225	/* the next two functions merely cache the padlists */	344	/* the next two functions merely cache the padlists */
226	static void	345	static void
227	get_padlist (pTHX_ CV *cv)	346	get_padlist (pTHX_ CV *cv)
228	{	347	{
229	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	348	MAGIC *mg = CORO_MAGIC (cv);
		349	AV *av;
230		350
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	351	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
232	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	352	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233	else	353	else
234	{	354	{
235	#if 0	355	#if CORO_PREFER_PERL_FUNCTIONS
236	/* this should work - but it doesn't :( */	356	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	357	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	358	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	359	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	360	SvREFCNT_dec (cp);
241	#else	361	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	362	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
245	}	365	}
246		366
247	static void	367	static void
248	put_padlist (pTHX_ CV *cv)	368	put_padlist (pTHX_ CV *cv)
249	{	369	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	MAGIC *mg = CORO_MAGIC (cv);
		371	AV *av;
251		372
252	if (!mg)	373	if (!mg)
253	{	374	{
254	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	375	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	376	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256	mg->mg_virtual = &vtbl_coro;	377	mg->mg_virtual = &vtbl_coro;
257	mg->mg_obj = (SV *)newAV ();	378	mg->mg_obj = (SV *)newAV ();
258	}	379	}
259		380
260	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	381	av = (AV *)mg->mg_obj;
261	}
262		382
263	#define SB do {	383	if (AvFILLp (av) >= AvMAX (av))
264	#define SE } while (0)	384	av_extend (av, AvMAX (av) + 1);
265		385
266	#define LOAD(state) load_state(aTHX_ (state));	386	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	387	}
268		388
269	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	389	/** load & save, init *******************************************************/
270		390
271	static void	391	static void
272	load_state(pTHX_ Coro__State c)	392	load_perl (pTHX_ Coro__State c)
273	{	393	{
274	PL_dowarn = c->dowarn;	394	#define VAR(name,type) PL_ ## name = c->name;
275	PL_in_eval = c->in_eval;	395	# include "state.h"
		396	#undef VAR
276		397
277	PL_curstackinfo = c->curstackinfo;	398	GvSV (PL_defgv) = c->defsv;
278	PL_curstack = c->curstack;	399	GvAV (PL_defgv) = c->defav;
279	PL_mainstack = c->mainstack;	400	GvSV (PL_errgv) = c->errsv;
280	PL_stack_sp = c->stack_sp;	401	GvSV (irsgv) = c->irssv_sv;
281	PL_op = c->op;
282	PL_curpad = c->curpad;
283	PL_comppad = c->comppad;
284	PL_compcv = c->compcv;
285	PL_stack_base = c->stack_base;
286	PL_stack_max = c->stack_max;
287	PL_tmps_stack = c->tmps_stack;
288	PL_tmps_floor = c->tmps_floor;
289	PL_tmps_ix = c->tmps_ix;
290	PL_tmps_max = c->tmps_max;
291	PL_markstack = c->markstack;
292	PL_markstack_ptr = c->markstack_ptr;
293	PL_markstack_max = c->markstack_max;
294	PL_scopestack = c->scopestack;
295	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9
301	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;
304	#endif
305	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312		402
313	{	403	{
314	dSP;	404	dSP;
315	CV *cv;	405	CV *cv;
316		406
317	/* now do the ugly restore mess */	407	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	408	while ((cv = (CV *)POPs))
319	{	409	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	410	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	411	CvDEPTH (cv) = PTR2IV (POPs);
326	}	412	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	413	}
330		414
331	PUTBACK;	415	PUTBACK;
332	}	416	}
333	}	417	}
334		418
335	static void	419	static void
336	save_state(pTHX_ Coro__State c, int flags)	420	save_perl (pTHX_ Coro__State c)
337	{	421	{
338	{	422	{
339	dSP;	423	dSP;
340	I32 cxix = cxstack_ix;	424	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	425	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	428	/*
345	* 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
346	* (and reinitialize) all cv's in the whole callchain :(	430	* (and reinitialize) all cv's in the whole callchain :(
347	*/	431	*/
348		432
349	PUSHs (Nullsv);	433	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	434	/* this loop was inspired by pp_caller */
351	for (;;)	435	for (;;)
352	{	436	{
353	while (cxix >= 0)	437	while (cxix >= 0)
354	{	438	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	439	PERL_CONTEXT *cx = &ccstk[cxix--];
356		440
357	if (CxTYPE(cx) == CXt_SUB)	441	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
358	{	442	{
359	CV *cv = cx->blk_sub.cv;	443	CV *cv = cx->blk_sub.cv;
		444
360	if (CvDEPTH(cv))	445	if (CvDEPTH (cv))
361	{	446	{
362	EXTEND (SP, CvDEPTH(cv)*2);	447	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	448	PUSHs ((SV *)CvPADLIST (cv));
		449	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	450	PUSHs ((SV *)cv);
373		451
		452	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	453	get_padlist (aTHX_ cv);
375	}	454	}
376	}	455	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	456	}
386		457
387	if (top_si->si_type == PERLSI_MAIN)	458	if (top_si->si_type == PERLSI_MAIN)
388	break;	459	break;
389		460
390	top_si = top_si->si_prev;	461	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	462	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	463	cxix = top_si->si_cxix;
393	}	464	}
394		465
395	PUTBACK;	466	PUTBACK;
396	}	467	}
397		468
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	469	c->defav = GvAV (PL_defgv);
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	470	c->defsv = DEFSV;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	471	c->errsv = ERRSV;
		472	c->irssv_sv = GvSV (irsgv);
401		473
402	c->dowarn = PL_dowarn;	474	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	475	# include "state.h"
404		476	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	477	}
437		478
438	/*	479	/*
439	* allocate various perl stacks. This is an exact copy	480	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	481	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	482	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	483	* not usually need a lot of stackspace.
443	*/	484	*/
		485	#if CORO_PREFER_PERL_FUNCTIONS
		486	# define coro_init_stacks init_stacks
		487	#else
444	static void	488	static void
445	coro_init_stacks (pTHX)	489	coro_init_stacks (pTHX)
446	{	490	{
447	LOCK;	491	PL_curstackinfo = new_stackinfo(64, 6);
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	492	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	493	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	494	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		495
454	PL_stack_base = AvARRAY(PL_curstack);	496	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	497	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	498	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		499
458	New(50,PL_tmps_stack,96,SV*);	500	New(50,PL_tmps_stack,64,SV*);
459	PL_tmps_floor = -1;	501	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	502	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	503	PL_tmps_max = 64;
462		504
463	New(54,PL_markstack,16,I32);	505	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	506	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	507	PL_markstack_max = PL_markstack + 16;
466		508
…		…
470		512
471	New(54,PL_scopestack,16,I32);	513	New(54,PL_scopestack,16,I32);
472	PL_scopestack_ix = 0;	514	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	515	PL_scopestack_max = 16;
474		516
475	New(54,PL_savestack,96,ANY);	517	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	518	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	519	PL_savestack_max = 64;
478		520
479	#if PERL_VERSION < 9	521	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	522	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	523	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	524	PL_retstack_max = 4;
483	#endif	525	#endif
484
485	UNLOCK;
486	}	526	}
		527	#endif
487		528
488	/*	529	/*
489	* destroy the stacks, the callchain etc...	530	* destroy the stacks, the callchain etc...
490	*/	531	*/
491	static void	532	static void
492	destroy_stacks(pTHX)	533	coro_destroy_stacks (pTHX)
493	{	534	{
494	if (!IN_DESTRUCT)
495	{
496	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);
498
499	/* sure it is, but more important: is it correct?? :/ */
500	FREETMPS;
501
502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503	}
504
505	while (PL_curstackinfo->si_next)	535	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	536	PL_curstackinfo = PL_curstackinfo->si_next;
507		537
508	while (PL_curstackinfo)	538	while (PL_curstackinfo)
509	{	539	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	540	PERL_SI *p = PL_curstackinfo->si_prev;
511		541
512	{ /*D*//*remove*/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	542	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	543	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		544
524	Safefree (PL_curstackinfo->si_cxstack);	545	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	546	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	547	PL_curstackinfo = p;
527	}	548	}
528		549
529	Safefree (PL_tmps_stack);	550	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	551	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	552	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	553	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	554	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	555	Safefree (PL_retstack);
535	#endif	556	#endif
536	}	557	}
537		558
538	static void	559	static size_t
539	allocate_stack (Coro__State ctx, int alloc)	560	coro_rss (pTHX_ struct coro *coro)
540	{	561	{
541	coro_stack *stack;	562	size_t rss = sizeof (*coro);
542		563
543	New (0, stack, 1, coro_stack);	564	if (coro->mainstack)
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{	565	{
551	#if HAVE_MMAP	566	if (coro->flags & CF_RUNNING)
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{	567	{
556	# if STACKGUARD	568	#define VAR(name,type)coro->name = PL_ ## name;
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	569	# include "state.h"
558	# endif	570	#undef VAR
559	}	571	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569		572
570	ctx->stack = stack;	573	rss += sizeof (coro->curstackinfo);
571	}	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);
572		581
573	static void	582	#if !PERL_VERSION_ATLEAST (5,9,0)
574	deallocate_stack (Coro__State ctx)	583	rss += coro->retstack_max * sizeof (OP *);
575	{	584	#endif
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{	585	}
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590		586
591	Safefree (stack);	587	return rss;
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}	588	}
597		589
		590	/** coroutine stack handling ************************************************/
		591
598	static void	592	static void
599	setup_coro (void *arg)	593	coro_setup (pTHX_ struct coro *coro)
600	{	594	{
601	/*	595	/*
602	* emulate part of the perl startup here.	596	* emulate part of the perl startup here.
603	*/	597	*/
		598	coro_init_stacks (aTHX);
		599
		600	PL_runops = RUNOPS_DEFAULT;
		601	PL_curcop = &PL_compiling;
		602	PL_in_eval = EVAL_NULL;
		603	PL_comppad = 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);
		615
		616	{
		617	dSP;
		618	LOGOP myop;
		619
		620	Zero (&myop, 1, LOGOP);
		621	myop.op_next = Nullop;
		622	myop.op_flags = OPf_WANT_VOID;
		623
		624	PUSHMARK (SP);
		625	XPUSHs (av_shift (GvAV (PL_defgv)));
		626	PUTBACK;
		627	PL_op = (OP *)&myop;
		628	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		629	SPAGAIN;
		630	}
		631
		632	ENTER; /* necessary e.g. for dounwind */
		633	}
		634
		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
		669	free_coro_mortal (pTHX)
		670	{
		671	if (coro_mortal)
		672	{
		673	SvREFCNT_dec (coro_mortal);
		674	coro_mortal = 0;
		675	}
		676	}
		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 */
		804	static void NOINLINE
		805	prepare_cctx (pTHX_ coro_cctx *cctx)
		806	{
		807	dSP;
		808	LOGOP myop;
		809
		810	PL_top_env = &PL_start_env;
		811
		812	if (cctx->flags & CC_TRACE)
		813	PL_runops = runops_trace;
		814
		815	Zero (&myop, 1, LOGOP);
		816	myop.op_next = PL_op;
		817	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		818
		819	PUSHMARK (SP);
		820	EXTEND (SP, 2);
		821	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		822	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		823	PUTBACK;
		824	PL_op = (OP *)&myop;
		825	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		826	SPAGAIN;
		827	}
		828
		829	/*
		830	* this is a _very_ stripped down perl interpreter ;)
		831	*/
		832	static void
		833	coro_run (void *arg)
		834	{
604	dTHX;	835	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608		836
609	coro_init_stacks (aTHX);	837	/* coro_run is the alternative tail of transfer(), so unlock here. */
610	/*PL_curcop = 0;*/	838	UNLOCK;
611	/*PL_in_eval = PL_in_eval;*/ /* inherit */
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614		839
615	SPAGAIN;	840	/* we now skip the entersub that lead to transfer() */
		841	PL_op = PL_op->op_next;
616		842
617	if (ctx->stack)	843	/* inject a fake subroutine call to cctx_init */
618	{	844	prepare_cctx (aTHX_ (coro_cctx *)arg);
619	ctx->cursp = 0;
620		845
621	PUSHMARK(SP);	846	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PUTBACK;	847	PL_restartop = PL_op;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	848	perl_run (PL_curinterp);
624		849
625	if (SvTRUE (ERRSV))	850	/*
626	croak (NULL);	851	* If perl-run returns we assume exit() was being called or the coro
627	else	852	* fell off the end, which seems to be the only valid (non-bug)
628	croak ("FATAL: CCTXT coroutine returned!");	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
		856	*/
		857	PL_top_env = main_top_env;
		858	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		859	}
		860
		861	static coro_cctx *
		862	cctx_new ()
		863	{
		864	coro_cctx *cctx;
		865	void *stack_start;
		866	size_t stack_size;
		867
		868	++cctx_count;
		869
		870	Newz (0, cctx, 1, coro_cctx);
		871
		872	#if HAVE_MMAP
		873
		874	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		875	/* mmap supposedly does allocate-on-write for us */
		876	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		877
		878	if (cctx->sptr != (void *)-1)
		879	{
		880	# if CORO_STACKGUARD
		881	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		882	# endif
		883	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		884	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		885	cctx->flags |= CC_MAPPED;
629	}	886	}
630	else	887	else
631	{	888	#endif
632	UNOP myop;
633
634	Zero(&myop, 1, UNOP);
635	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;
637
638	PL_op = (OP *)&myop;
639
640	PUSHMARK(SP);
641	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;
652
653	ENTER; /* necessary e.g. for dounwind */
654	}	889	{
655	}	890	cctx->ssize = coro_stacksize * (long)sizeof (long);
		891	New (0, cctx->sptr, coro_stacksize, long);
656		892
657	static void	893	if (!cctx->sptr)
658	continue_coro (void *arg)	894	{
659	{	895	perror ("FATAL: unable to allocate stack for coroutine");
660	/*	896	_exit (EXIT_FAILURE);
661	* this is a _very_ stripped down perl interpreter ;)	897	}
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665		898
666	PL_top_env = &ctx->start_env;	899	stack_start = cctx->sptr;
		900	stack_size = cctx->ssize;
		901	}
667		902
668	ctx->cursp = 0;	903	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
669	PL_op = PL_op->op_next;	904	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
670	CALLRUNOPS(aTHX);
671		905
672	abort ();	906	return cctx;
673	}	907	}
674		908
675	static void	909	static void
		910	cctx_destroy (coro_cctx *cctx)
		911	{
		912	if (!cctx)
		913	return;
		914
		915	--cctx_count;
		916
		917	#if CORO_USE_VALGRIND
		918	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		919	#endif
		920
		921	#if HAVE_MMAP
		922	if (cctx->flags & CC_MAPPED)
		923	munmap (cctx->sptr, cctx->ssize);
		924	else
		925	#endif
		926	Safefree (cctx->sptr);
		927
		928	Safefree (cctx);
		929	}
		930
		931	static coro_cctx *
		932	cctx_get (pTHX)
		933	{
		934	while (cctx_first)
		935	{
		936	coro_cctx *cctx = cctx_first;
		937	cctx_first = cctx->next;
		938	--cctx_idle;
		939
		940	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		941	return cctx;
		942
		943	cctx_destroy (cctx);
		944	}
		945
		946	return cctx_new ();
		947	}
		948
		949	static void
		950	cctx_put (coro_cctx *cctx)
		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
		962	++cctx_idle;
		963	cctx->next = cctx_first;
		964	cctx_first = cctx;
		965	}
		966
		967	/** coroutine switching *****************************************************/
		968
		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
676	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	990	transfer (pTHX_ struct coro *prev, struct coro *next)
677	{	991	{
678	dSTACKLEVEL;	992	dSTACKLEVEL;
679		993
		994	/* sometimes transfer is only called to set idle_sp */
		995	if (!next)
		996	{
		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	}
680	if (prev != next)	1000	else if (prev != next)
681	{	1001	{
682	if (next->mainstack)	1002	coro_cctx *prev__cctx;
		1003
		1004	if (prev->flags & CF_NEW)
683	{	1005	{
684	LOCK;	1006	/* create a new empty context */
685	SAVE (prev, flags);	1007	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	1008	prev->flags &= ~CF_NEW;
687	UNLOCK;	1009	prev->flags |= CF_RUNNING;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	1010	}
722	else if (next->tmps_ix == -2)	1011
723	croak ("tried to transfer to running coroutine");	1012	prev->flags &= ~CF_RUNNING;
		1013	next->flags |= CF_RUNNING;
		1014
		1015	LOCK;
		1016
		1017	if (next->flags & CF_NEW)
		1018	{
		1019	/* need to start coroutine */
		1020	next->flags &= ~CF_NEW;
		1021	/* first get rid of the old state */
		1022	save_perl (aTHX_ prev);
		1023	/* setup coroutine call */
		1024	coro_setup (aTHX_ next);
		1025	}
724	else	1026	else
725	{	1027	{
726	LOCK;	1028	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	1029	save_perl (aTHX_ prev);
728	UNLOCK;	1030	load_perl (aTHX_ next);
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}	1031	}
765	}
766		1032
767	LOCK;	1033	prev__cctx = prev->cctx;
768	if (coro_mortal)	1034
769	{	1035	/* possibly "free" the cctx */
770	SvREFCNT_dec (coro_mortal);	1036	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
771	coro_mortal = 0;	1037	{
772	}	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
		1041	prev->cctx = 0;
		1042
		1043	cctx_put (prev__cctx);
		1044	}
		1045
		1046	++next->usecount;
		1047
		1048	if (!next->cctx)
		1049	next->cctx = cctx_get (aTHX);
		1050
		1051	if (prev__cctx != next->cctx)
		1052	{
		1053	prev__cctx->top_env = PL_top_env;
		1054	PL_top_env = next->cctx->top_env;
		1055	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1056	}
		1057
		1058	free_coro_mortal (aTHX);
773	UNLOCK;	1059	UNLOCK;
		1060	}
774	}	1061	}
775		1062
776	#define SV_CORO(sv,func) \	1063	struct transfer_args
777	do { \	1064	{
778	if (SvROK (sv)) \	1065	struct coro *prev, *next;
779	sv = SvRV (sv); \	1066	};
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		1067
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1068	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1069	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
798		1070
		1071	/** high level stuff ********************************************************/
		1072
799	static void	1073	static int
		1074	coro_state_destroy (pTHX_ struct coro *coro)
		1075	{
		1076	if (coro->flags & CF_DESTROYED)
		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 */
		1091
		1092	if (coro->mainstack && coro->mainstack != main_mainstack)
		1093	{
		1094	struct coro temp;
		1095
		1096	if (coro->flags & CF_RUNNING)
		1097	croak ("FATAL: tried to destroy currently running coroutine");
		1098
		1099	save_perl (aTHX_ &temp);
		1100	load_perl (aTHX_ coro);
		1101
		1102	coro_destroy (aTHX_ coro);
		1103
		1104	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1105
		1106	coro->mainstack = 0;
		1107	}
		1108
		1109	cctx_destroy (coro->cctx);
		1110	SvREFCNT_dec (coro->args);
		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;
		1117	}
		1118
		1119	static int
		1120	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1121	{
		1122	struct coro *coro = (struct coro *)mg->mg_ptr;
		1123	mg->mg_ptr = 0;
		1124
		1125	coro->hv = 0;
		1126
		1127	if (--coro->refcnt < 0)
		1128	{
		1129	coro_state_destroy (aTHX_ coro);
		1130	Safefree (coro);
		1131	}
		1132
		1133	return 0;
		1134	}
		1135
		1136	static int
		1137	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1138	{
		1139	struct coro *coro = (struct coro *)mg->mg_ptr;
		1140
		1141	++coro->refcnt;
		1142
		1143	return 0;
		1144	}
		1145
		1146	static MGVTBL coro_state_vtbl = {
		1147	0, 0, 0, 0,
		1148	coro_state_free,
		1149	0,
		1150	#ifdef MGf_DUP
		1151	coro_state_dup,
		1152	#else
		1153	# define MGf_DUP 0
		1154	#endif
		1155	};
		1156
		1157	static void
		1158	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1159	{
		1160	ta->prev = SvSTATE (prev_sv);
		1161	ta->next = SvSTATE (next_sv);
		1162	TRANSFER_CHECK (*ta);
		1163	}
		1164
		1165	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1166	api_transfer (SV *prev_sv, SV *next_sv)
801	{	1167	{
802	SV_CORO (prev, "Coro::transfer");	1168	dTHX;
803	SV_CORO (next, "Coro::transfer");	1169	struct transfer_args ta;
804		1170
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1171	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1172	TRANSFER (ta);
806	}	1173	}
807		1174
808	/** Coro ********************************************************************/	1175	/** Coro ********************************************************************/
809		1176
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1177	static void
823	coro_enq (pTHX_ SV *sv)	1178	coro_enq (pTHX_ SV *coro_sv)
824	{	1179	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1180	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1181	}
841		1182
842	static SV *	1183	static SV *
843	coro_deq (pTHX_ int min_prio)	1184	coro_deq (pTHX_ int min_prio)
844	{	1185	{
…		…
847	min_prio -= PRIO_MIN;	1188	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1189	if (min_prio < 0)
849	min_prio = 0;	1190	min_prio = 0;
850		1191
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1192	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	1193	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1194	return av_shift (coro_ready [prio]);
856	}
857		1195
858	return 0;	1196	return 0;
859	}	1197	}
860		1198
861	static void	1199	static int
862	api_ready (SV *coro)	1200	api_ready (SV *coro_sv)
863	{	1201	{
864	dTHX;	1202	dTHX;
		1203	struct coro *coro;
865		1204
866	if (SvROK (coro))	1205	if (SvROK (coro_sv))
867	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;
868		1214
869	LOCK;	1215	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1216	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1217	++coro_nready;
871	UNLOCK;	1218	UNLOCK;
		1219
		1220	return 1;
		1221	}
		1222
		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
		1231	prepare_schedule (pTHX_ struct transfer_args *ta)
		1232	{
		1233	SV *prev_sv, *next_sv;
		1234
		1235	for (;;)
		1236	{
		1237	LOCK;
		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;
		1270	UNLOCK;
		1271	break;
		1272	}
		1273
		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
		1282	LOCK;
		1283	free_coro_mortal (aTHX);
		1284	coro_mortal = prev_sv;
		1285	UNLOCK;
		1286	}
		1287
		1288	static void
		1289	prepare_cede (pTHX_ struct transfer_args *ta)
		1290	{
		1291	api_ready (coro_current);
		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;
872	}	1307	}
873		1308
874	static void	1309	static void
875	api_schedule (void)	1310	api_schedule (void)
876	{	1311	{
877	dTHX;	1312	dTHX;
		1313	struct transfer_args ta;
878		1314
879	SV *prev, *next;	1315	prepare_schedule (aTHX_ &ta);
880		1316	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1317	}
902		1318
903	static void	1319	static int
904	api_cede (void)	1320	api_cede (void)
905	{	1321	{
906	dTHX;	1322	dTHX;
		1323	struct transfer_args ta;
907		1324
908	LOCK;	1325	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1326
912	api_schedule ();	1327	if (ta.prev != ta.next)
		1328	{
		1329	TRANSFER (ta);
		1330	return 1;
		1331	}
		1332	else
		1333	return 0;
913	}	1334	}
914		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
915	MODULE = Coro::State PACKAGE = Coro::State	1377	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1378
917	PROTOTYPES: ENABLE	1379	PROTOTYPES: DISABLE
918		1380
919	BOOT:	1381	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1382	{
921	#ifdef USE_ITHREADS	1383	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1384	MUTEX_INIT (&coro_mutex);
923	#endif	1385	#endif
924	BOOT_PAGESIZE;	1386	BOOT_PAGESIZE;
925		1387
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1388	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1389	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1390
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1391	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1392
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1397
935	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;
936		1403
937	coroapi.ver = CORO_API_VERSION;	1404	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1405	coroapi.transfer = api_transfer;
939	}
940		1406
941	Coro::State	1407	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1408	}
943	SV * args	1409
944	PROTOTYPE: $	1410	SV *
		1411	new (char *klass, ...)
945	CODE:	1412	CODE:
946	Coro__State coro;	1413	{
		1414	struct coro *coro;
		1415	HV *hv;
		1416	int i;
947		1417
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1418	Newz (0, coro, 1, struct coro);
		1419	coro->args = newAV ();
		1420	coro->flags = CF_NEW;
952		1421
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1422	if (coro_first) coro_first->prev = coro;
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1423	coro->next = coro_first;
955	/*coro->stack = 0;*/	1424	coro_first = coro;
956		1425
957	/* same as JMPENV_BOOTSTRAP */	1426	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1427	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
959	/*Zero (&coro->start_env, 1, JMPENV);*/	1428	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1429
963	RETVAL = coro;	1430	for (i = 1; i < items; i++)
		1431	av_push (coro->args, newSVsv (ST (i)));
		1432	}
964	OUTPUT:	1433	OUTPUT:
965	RETVAL	1434	RETVAL
966		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
967	void	1439	void
968	transfer(prev, next, flags)	1440	_set_stacklevel (...)
969	SV *prev	1441	ALIAS:
970	SV *next	1442	Coro::State::transfer = 1
971	int flags	1443	Coro::schedule = 2
972	PROTOTYPE: @	1444	Coro::cede = 3
		1445	Coro::cede_notself = 4
973	CODE:	1446	CODE:
974	PUTBACK;	1447	{
975	SV_CORO (next, "Coro::transfer");	1448	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1449
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1450	switch (ix)
978	SPAGAIN;	1451	{
		1452	case 0:
		1453	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1454	ta.next = 0;
		1455	break;
		1456
		1457	case 1:
		1458	if (items != 2)
		1459	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1460
		1461	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1462	break;
		1463
		1464	case 2:
		1465	prepare_schedule (aTHX_ &ta);
		1466	break;
		1467
		1468	case 3:
		1469	prepare_cede (aTHX_ &ta);
		1470	break;
		1471
		1472	case 4:
		1473	if (!prepare_cede_notself (aTHX_ &ta))
		1474	XSRETURN_EMPTY;
		1475
		1476	break;
		1477	}
		1478
		1479	BARRIER;
		1480	TRANSFER (ta);
		1481
		1482	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1483	XSRETURN_YES;
		1484	}
		1485
		1486	bool
		1487	_destroy (SV *coro_sv)
		1488	CODE:
		1489	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1490	OUTPUT:
		1491	RETVAL
979		1492
980	void	1493	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD (aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1494	_exit (code)
1008	int code	1495	int code
1009	PROTOTYPE: $	1496	PROTOTYPE: $
1010	CODE:	1497	CODE:
1011	_exit (code);	1498	_exit (code);
1012		1499
1013	MODULE = Coro::State PACKAGE = Coro::Cont	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
1014		1508
1015	# this is slightly dirty (should expose a c-level api)	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
1016		1522
1017	void	1523	void
1018	yield(...)	1524	list ()
1019	PROTOTYPE: @	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
1020	CODE:	1611	CODE:
1021	SV *yieldstack;	1612	switch (ix)
1022	SV *sv;	1613	{
1023	AV *defav = GvAV (PL_defgv);	1614	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1024	struct coro *prev, *next;	1615	case 1: RETVAL = coro->usecount; break;
1025
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0	1616	}
1030	);	1617	OUTPUT:
		1618	RETVAL
1031		1619
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1620
1045	MODULE = Coro::State PACKAGE = Coro	1621	MODULE = Coro::State PACKAGE = Coro
1046		1622
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1623	BOOT:
1050	{	1624	{
1051	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);
		1633
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1634	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1635
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1636	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1637	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1638	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1639	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1640	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1641	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1642
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1643	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065	coro_ready[i] = newAV ();	1644	coro_ready[i] = newAV ();
1066		1645
1067	{	1646	{
1068	SV *sv = perl_get_sv("Coro::API", 1);	1647	SV *sv = perl_get_sv("Coro::API", 1);
1069		1648
1070	coroapi.schedule = api_schedule;	1649	coroapi.schedule = api_schedule;
1071	coroapi.cede = api_cede;	1650	coroapi.cede = api_cede;
		1651	coroapi.cede_notself = api_cede_notself;
1072	coroapi.ready = api_ready;	1652	coroapi.ready = api_ready;
		1653	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1654	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1655	coroapi.current = coro_current;
1075		1656
1076	GCoroAPI = &coroapi;	1657	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1658	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1659	SvREADONLY_on (sv);
1079	}	1660	}
1080	}	1661	}
1081		1662
1082	#if !PERL_MICRO
1083
1084	void	1663	void
1085	ready(self)	1664	_set_current (SV *current)
1086	SV * self
1087	PROTOTYPE: $	1665	PROTOTYPE: $
1088	CODE:	1666	CODE:
1089	api_ready (self);	1667	SvREFCNT_dec (SvRV (coro_current));
1090		1668	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091	#endif
1092		1669
1093	int	1670	int
		1671	prio (Coro::State coro, int newprio = 0)
		1672	ALIAS:
		1673	nice = 1
		1674	CODE:
		1675	{
		1676	RETVAL = coro->prio;
		1677
		1678	if (items > 1)
		1679	{
		1680	if (ix)
		1681	newprio = coro->prio - newprio;
		1682
		1683	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1684	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1685
		1686	coro->prio = newprio;
		1687	}
		1688	}
		1689	OUTPUT:
		1690	RETVAL
		1691
		1692	SV *
		1693	ready (SV *self)
		1694	PROTOTYPE: $
		1695	CODE:
		1696	RETVAL = boolSV (api_ready (self));
		1697	OUTPUT:
		1698	RETVAL
		1699
		1700	int
1094	nready(...)	1701	nready (...)
1095	PROTOTYPE:	1702	PROTOTYPE:
1096	CODE:	1703	CODE:
1097	RETVAL = coro_nready;	1704	RETVAL = coro_nready;
1098	OUTPUT:	1705	OUTPUT:
1099	RETVAL	1706	RETVAL
1100		1707
		1708	# for async_pool speedup
1101	void	1709	void
1102	schedule(...)	1710	_pool_1 (SV *cb)
1103	PROTOTYPE:
1104	CODE:	1711	CODE:
1105	api_schedule ();	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	}
1106		1743
1107	void	1744	void
1108	cede(...)	1745	_pool_2 (SV *cb)
1109	PROTOTYPE:
1110	CODE:	1746	CODE:
1111	api_cede ();	1747	{
		1748	struct coro *coro = SvSTATE (coro_current);
1112		1749
1113	# and these are hacks	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
		1772	MODULE = Coro::State PACKAGE = Coro::AIO
		1773
1114	SV *	1774	SV *
1115	_aio_get_state ()	1775	_get_state ()
1116	CODE:	1776	CODE:
1117	{	1777	{
1118	struct {	1778	struct io_state *data;
1119	int errorno;
1120	int laststype;
1121	int laststatval;
1122	Stat_t statcache;
1123	} data;
1124		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
1125	data.errorno = errno;	1785	data->errorno = errno;
1126	data.laststype = PL_laststype;	1786	data->laststype = PL_laststype;
1127	data.laststatval = PL_laststatval;	1787	data->laststatval = PL_laststatval;
1128	data.statcache = PL_statcache;	1788	data->statcache = PL_statcache;
1129
1130	RETVAL = newSVpvn ((char *)&data, sizeof data);
1131	}	1789	}
1132	OUTPUT:	1790	OUTPUT:
1133	RETVAL	1791	RETVAL
1134		1792
1135	void	1793	void
1136	_aio_set_state (char *data_)	1794	_set_state (char *data_)
1137	PROTOTYPE: $	1795	PROTOTYPE: $
1138	CODE:	1796	CODE:
1139	{	1797	{
1140	struct {	1798	struct io_state *data = (void *)data_;
1141	int errorno;
1142	int laststype;
1143	int laststatval;
1144	Stat_t statcache;
1145	} *data = (void *)data_;
1146		1799
1147	errno = data->errorno;	1800	errno = data->errorno;
1148	PL_laststype = data->laststype;	1801	PL_laststype = data->laststype;
1149	PL_laststatval = data->laststatval;	1802	PL_laststatval = data->laststatval;
1150	PL_statcache = data->statcache;	1803	PL_statcache = data->statcache;
1151	}	1804	}
		1805

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