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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.188 by root, Fri Oct 5 20:36:31 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"
8		10
9	#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)
10	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
12	# endif	57	# endif
13	# ifndef call_sv	58	# ifndef call_sv
14	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
27	# endif	72	# endif
28	#endif	73	#endif
29		74
30	#include <stdio.h>	75	/* 5.8.7 */
31	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
32		79
33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34	# undef STACKGUARD	81	# undef CORO_STACKGUARD
35	#endif
36
37	#ifndef STACKGUARD
38	# define STACKGUARD 0
39	#endif
40
41	#ifdef HAVE_MMAP
42	# include <unistd.h>
43	# include <sys/mman.h>
44	# ifndef MAP_ANONYMOUS
45	# ifdef MAP_ANON
46	# define MAP_ANONYMOUS MAP_ANON
47	# else
48	# undef HAVE_MMAP
49	# endif
50	# endif	82	#endif
51	# include <limits.h>	83
52	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
53	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55	static long pagesize;
56	# else
57	# define BOOT_PAGESIZE
58	# endif	86	#endif
59	#endif
60		87
61	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
62	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
63	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
64	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
65	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
66		97
67	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
68		99
		100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
		109
69	#include "CoroAPI.h"	110	#include "CoroAPI.h"
70
71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72		111
73	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
74	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77	#else	116	#else
78	# define LOCK (void)0	117	# define LOCK (void)0
79	# define UNLOCK (void)0	118	# define UNLOCK (void)0
80	#endif	119	#endif
81		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
82	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
83	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
84	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
85	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
86		136
		137	static GV *irsgv; /* $/ */
		138	static GV *stdoutgv; /* STDOUT */
		139
		140	/* async_pool helper stuff */
		141	static SV *sv_pool_rss;
		142	static SV *sv_pool_size;
		143	static AV *av_async_pool;
		144
		145	static struct coro_cctx *cctx_first;
		146	static int cctx_count, cctx_idle;
		147
		148	enum {
		149	CC_MAPPED = 0x01,
		150	CC_NOREUSE = 0x02, /* throw this away after tracing */
		151	CC_TRACE = 0x04,
		152	CC_TRACE_SUB = 0x08, /* trace sub calls */
		153	CC_TRACE_LINE = 0x10, /* trace each statement */
		154	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		155	};
		156
87	/* this is a structure representing a c-level coroutine */	157	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	158	typedef struct coro_cctx {
89	struct coro_stack *next;	159	struct coro_cctx *next;
90		160
91	/* the stack */	161	/* the stack */
92	void *sptr;	162	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	163	size_t ssize;
94		164
95	/* cpu state */	165	/* cpu state */
96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	166	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		167	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
97	JMPENV *top_env;	168	JMPENV *top_env;
98	coro_context cctx;	169	coro_context cctx;
99	} coro_stack;	170
		171	#if CORO_USE_VALGRIND
		172	int valgrind_id;
		173	#endif
		174	unsigned char flags;
		175	} coro_cctx;
		176
		177	enum {
		178	CF_RUNNING = 0x0001, /* coroutine is running */
		179	CF_READY = 0x0002, /* coroutine is ready */
		180	CF_NEW = 0x0004, /* has never been switched to */
		181	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		182	};
100		183
101	/* this is a structure representing a perl-level coroutine */	184	/* this is a structure representing a perl-level coroutine */
102	struct coro {	185	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	186	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	187	coro_cctx *cctx;
105		188
106	/* data associated with this coroutine (initial args) */	189	/* data associated with this coroutine (initial args) */
107	AV *args;	190	AV *args;
108	int refcnt;	191	int refcnt;
		192	int flags; /* CF_ flags */
109		193
110	/* optionally saved, might be zero */	194	/* optionally saved, might be zero */
111	AV *defav;	195	AV *defav; /* @_ */
112	SV *defsv;	196	SV *defsv; /* $_ */
113	SV *errsv;	197	SV *errsv; /* $@ */
		198	SV *deffh; /* default filehandle */
		199	SV *irssv; /* $/ */
		200	SV *irssv_sv; /* real $/ cache */
114		201
115	/* saved global state not related to stacks */	202	#define VAR(name,type) type name;
116	U8 dowarn;	203	# include "state.h"
117	I32 in_eval;	204	#undef VAR
118		205
119	/* the stacks and related info (callchain etc..) */	206	/* statistics */
120	PERL_SI *curstackinfo;	207	int usecount; /* number of transfers to this coro */
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148		208
149	/* coro process data */	209	/* coro process data */
150	int prio;	210	int prio;
		211	//SV *throw;
		212
		213	/* async_pool */
		214	SV *saved_deffh;
		215
		216	/* linked list */
		217	struct coro *next, *prev;
		218	HV *hv; /* the perl hash associated with this coro, if any */
151	};	219	};
152		220
153	typedef struct coro *Coro__State;	221	typedef struct coro *Coro__State;
154	typedef struct coro *Coro__State_or_hashref;	222	typedef struct coro *Coro__State_or_hashref;
155		223
		224	/** Coro ********************************************************************/
		225
		226	#define PRIO_MAX 3
		227	#define PRIO_HIGH 1
		228	#define PRIO_NORMAL 0
		229	#define PRIO_LOW -1
		230	#define PRIO_IDLE -3
		231	#define PRIO_MIN -4
		232
		233	/* for Coro.pm */
		234	static SV *coro_current;
		235	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		236	static int coro_nready;
		237	static struct coro *coro_first;
		238
		239	/** lowlevel stuff **********************************************************/
		240
156	static AV *	241	static AV *
157	coro_clone_padlist (CV *cv)	242	coro_clone_padlist (pTHX_ CV *cv)
158	{	243	{
159	AV *padlist = CvPADLIST (cv);	244	AV *padlist = CvPADLIST (cv);
160	AV *newpadlist, *newpad;	245	AV *newpadlist, *newpad;
161		246
162	newpadlist = newAV ();	247	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	248	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	249	#if PERL_VERSION_ATLEAST (5,9,0)
		250	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		251	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	252	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	253	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	254	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	255	--AvFILLp (padlist);
171		256
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	257	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
174		259
175	return newpadlist;	260	return newpadlist;
176	}	261	}
177		262
178	static void	263	static void
179	free_padlist (AV *padlist)	264	free_padlist (pTHX_ AV *padlist)
180	{	265	{
181	/* may be during global destruction */	266	/* may be during global destruction */
182	if (SvREFCNT (padlist))	267	if (SvREFCNT (padlist))
183	{	268	{
184	I32 i = AvFILLp (padlist);	269	I32 i = AvFILLp (padlist);
…		…
205	AV *padlist;	290	AV *padlist;
206	AV *av = (AV *)mg->mg_obj;	291	AV *av = (AV *)mg->mg_obj;
207		292
208	/* casting is fun. */	293	/* casting is fun. */
209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	294	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210	free_padlist (padlist);	295	free_padlist (aTHX_ padlist);
211		296
212	SvREFCNT_dec (av);	297	SvREFCNT_dec (av);
213		298
214	return 0;	299	return 0;
215	}	300	}
216		301
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	302	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		303
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	304	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		305
		306	#define CORO_MAGIC(cv) \
		307	SvMAGIC (cv) \
		308	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		309	? SvMAGIC (cv) \
		310	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		311	: 0
		312
		313	static struct coro *
		314	SvSTATE_ (pTHX_ SV *coro)
		315	{
		316	HV *stash;
		317	MAGIC *mg;
		318
		319	if (SvROK (coro))
		320	coro = SvRV (coro);
		321
		322	if (SvTYPE (coro) != SVt_PVHV)
		323	croak ("Coro::State object required");
		324
		325	stash = SvSTASH (coro);
		326	if (stash != coro_stash && stash != coro_state_stash)
		327	{
		328	/* very slow, but rare, check */
		329	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		330	croak ("Coro::State object required");
		331	}
		332
		333	mg = CORO_MAGIC (coro);
		334	return (struct coro *)mg->mg_ptr;
		335	}
		336
		337	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		338
221	/* the next two functions merely cache the padlists */	339	/* the next two functions merely cache the padlists */
222	static void	340	static void
223	get_padlist (CV *cv)	341	get_padlist (pTHX_ CV *cv)
224	{	342	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	343	MAGIC *mg = CORO_MAGIC (cv);
		344	AV *av;
226		345
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	346	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	347	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	348	else
230	{	349	{
231	#if 0	350	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	351	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	352	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	353	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	354	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	355	SvREFCNT_dec (cp);
237	#else	356	#else
238	CvPADLIST (cv) = coro_clone_padlist (cv);	357	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239	#endif	358	#endif
240	}	359	}
241	}	360	}
242		361
243	static void	362	static void
244	put_padlist (CV *cv)	363	put_padlist (pTHX_ CV *cv)
245	{	364	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	365	MAGIC *mg = CORO_MAGIC (cv);
		366	AV *av;
247		367
248	if (!mg)	368	if (!mg)
249	{	369	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	370	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	371	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	372	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	373	mg->mg_obj = (SV *)newAV ();
254	}	374	}
255		375
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	376	av = (AV *)mg->mg_obj;
257	}
258		377
259	#define SB do {	378	if (AvFILLp (av) >= AvMAX (av))
260	#define SE } while (0)	379	av_extend (av, AvMAX (av) + 1);
261		380
262	#define LOAD(state) load_state((state));	381	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	#define SAVE(state,flags) save_state((state),(flags));	382	}
264		383
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	384	/** load & save, init *******************************************************/
266		385
267	static void	386	static void
268	load_state(Coro__State c)	387	load_perl (pTHX_ Coro__State c)
269	{	388	{
270	PL_dowarn = c->dowarn;	389	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	390	# include "state.h"
		391	#undef VAR
272		392
273	PL_curstackinfo = c->curstackinfo;	393	GvSV (PL_defgv) = c->defsv;
274	PL_curstack = c->curstack;	394	GvAV (PL_defgv) = c->defav;
275	PL_mainstack = c->mainstack;	395	GvSV (PL_errgv) = c->errsv;
276	PL_stack_sp = c->stack_sp;	396	GvSV (irsgv) = c->irssv_sv;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
307		397
308	{	398	{
309	dSP;	399	dSP;
310	CV *cv;	400	CV *cv;
311		401
312	/* now do the ugly restore mess */	402	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	403	while ((cv = (CV *)POPs))
314	{	404	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	405	put_padlist (aTHX_ cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	406	CvDEPTH (cv) = PTR2IV (POPs);
321	}	407	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	408	}
325		409
326	PUTBACK;	410	PUTBACK;
327	}	411	}
328	}	412	}
329		413
330	static void	414	static void
331	save_state(Coro__State c, int flags)	415	save_perl (pTHX_ Coro__State c)
332	{	416	{
333	{	417	{
334	dSP;	418	dSP;
335	I32 cxix = cxstack_ix;	419	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	420	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	423	/*
340	* the worst thing you can imagine happens first - we have to save	424	* the worst thing you can imagine happens first - we have to save
341	* (and reinitialize) all cv's in the whole callchain :(	425	* (and reinitialize) all cv's in the whole callchain :(
342	*/	426	*/
343		427
344	PUSHs (Nullsv);	428	XPUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	429	/* this loop was inspired by pp_caller */
346	for (;;)	430	for (;;)
347	{	431	{
348	while (cxix >= 0)	432	while (cxix >= 0)
349	{	433	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	434	PERL_CONTEXT *cx = &ccstk[cxix--];
351		435
352	if (CxTYPE(cx) == CXt_SUB)	436	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
353	{	437	{
354	CV *cv = cx->blk_sub.cv;	438	CV *cv = cx->blk_sub.cv;
		439
355	if (CvDEPTH(cv))	440	if (CvDEPTH (cv))
356	{	441	{
357	EXTEND (SP, CvDEPTH(cv)*2);	442	EXTEND (SP, 3);
358
359	while (--CvDEPTH(cv))
360	{
361	/* this tells the restore code to increment CvDEPTH */
362	PUSHs (Nullsv);
363	PUSHs ((SV *)cv);
364	}
365
366	PUSHs ((SV *)CvPADLIST(cv));	443	PUSHs ((SV *)CvPADLIST (cv));
		444	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	445	PUSHs ((SV *)cv);
368		446
		447	CvDEPTH (cv) = 0;
369	get_padlist (cv);	448	get_padlist (aTHX_ cv);
370	}	449	}
371	}	450	}
372	#ifdef CXt_FORMAT
373	else if (CxTYPE(cx) == CXt_FORMAT)
374	{
375	/* I never used formats, so how should I know how these are implemented? */
376	/* my bold guess is as a simple, plain sub... */
377	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378	}
379	#endif
380	}	451	}
381		452
382	if (top_si->si_type == PERLSI_MAIN)	453	if (top_si->si_type == PERLSI_MAIN)
383	break;	454	break;
384		455
385	top_si = top_si->si_prev;	456	top_si = top_si->si_prev;
386	ccstk = top_si->si_cxstack;	457	ccstk = top_si->si_cxstack;
387	cxix = top_si->si_cxix;	458	cxix = top_si->si_cxix;
388	}	459	}
389		460
390	PUTBACK;	461	PUTBACK;
391	}	462	}
392		463
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	464	c->defav = GvAV (PL_defgv);
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	465	c->defsv = DEFSV;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	466	c->errsv = ERRSV;
		467	c->irssv_sv = GvSV (irsgv);
396		468
397	c->dowarn = PL_dowarn;	469	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	470	# include "state.h"
399		471	#undef VAR
400	c->curstackinfo = PL_curstackinfo;
401	c->curstack = PL_curstack;
402	c->mainstack = PL_mainstack;
403	c->stack_sp = PL_stack_sp;
404	c->op = PL_op;
405	c->curpad = PL_curpad;
406	c->comppad = PL_comppad;
407	c->compcv = PL_compcv;
408	c->stack_base = PL_stack_base;
409	c->stack_max = PL_stack_max;
410	c->tmps_stack = PL_tmps_stack;
411	c->tmps_floor = PL_tmps_floor;
412	c->tmps_ix = PL_tmps_ix;
413	c->tmps_max = PL_tmps_max;
414	c->markstack = PL_markstack;
415	c->markstack_ptr = PL_markstack_ptr;
416	c->markstack_max = PL_markstack_max;
417	c->scopestack = PL_scopestack;
418	c->scopestack_ix = PL_scopestack_ix;
419	c->scopestack_max = PL_scopestack_max;
420	c->savestack = PL_savestack;
421	c->savestack_ix = PL_savestack_ix;
422	c->savestack_max = PL_savestack_max;
423	#if PERL_VERSION < 9
424	c->retstack = PL_retstack;
425	c->retstack_ix = PL_retstack_ix;
426	c->retstack_max = PL_retstack_max;
427	#endif
428	c->curpm = PL_curpm;
429	c->curcop = PL_curcop;
430	}	472	}
431		473
432	/*	474	/*
433	* allocate various perl stacks. This is an exact copy	475	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	476	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	477	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	478	* not usually need a lot of stackspace.
437	*/	479	*/
		480	#if CORO_PREFER_PERL_FUNCTIONS
		481	# define coro_init_stacks init_stacks
		482	#else
438	static void	483	static void
439	coro_init_stacks ()	484	coro_init_stacks (pTHX)
440	{	485	{
441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	486	PL_curstackinfo = new_stackinfo(64, 6);
442	PL_curstackinfo->si_type = PERLSI_MAIN;	487	PL_curstackinfo->si_type = PERLSI_MAIN;
443	PL_curstack = PL_curstackinfo->si_stack;	488	PL_curstack = PL_curstackinfo->si_stack;
444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445		490
446	PL_stack_base = AvARRAY(PL_curstack);	491	PL_stack_base = AvARRAY(PL_curstack);
447	PL_stack_sp = PL_stack_base;	492	PL_stack_sp = PL_stack_base;
448	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449		494
450	New(50,PL_tmps_stack,96,SV*);	495	New(50,PL_tmps_stack,64,SV*);
451	PL_tmps_floor = -1;	496	PL_tmps_floor = -1;
452	PL_tmps_ix = -1;	497	PL_tmps_ix = -1;
453	PL_tmps_max = 96;	498	PL_tmps_max = 64;
454		499
455	New(54,PL_markstack,16,I32);	500	New(54,PL_markstack,16,I32);
456	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
457	PL_markstack_max = PL_markstack + 16;	502	PL_markstack_max = PL_markstack + 16;
458		503
…		…
462		507
463	New(54,PL_scopestack,16,I32);	508	New(54,PL_scopestack,16,I32);
464	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
465	PL_scopestack_max = 16;	510	PL_scopestack_max = 16;
466		511
467	New(54,PL_savestack,96,ANY);	512	New(54,PL_savestack,64,ANY);
468	PL_savestack_ix = 0;	513	PL_savestack_ix = 0;
469	PL_savestack_max = 96;	514	PL_savestack_max = 64;
470		515
471	#if PERL_VERSION < 9	516	#if !PERL_VERSION_ATLEAST (5,9,0)
472	New(54,PL_retstack,8,OP*);	517	New(54,PL_retstack,4,OP*);
473	PL_retstack_ix = 0;	518	PL_retstack_ix = 0;
474	PL_retstack_max = 8;	519	PL_retstack_max = 4;
475	#endif	520	#endif
476	}	521	}
		522	#endif
477		523
478	/*	524	/*
479	* destroy the stacks, the callchain etc...	525	* destroy the stacks, the callchain etc...
480	*/	526	*/
481	static void	527	static void
482	destroy_stacks()	528	coro_destroy_stacks (pTHX)
483	{	529	{
484	if (!IN_DESTRUCT)
485	{
486	/* is this ugly, I ask? */
487	LEAVE_SCOPE (0);
488
489	/* sure it is, but more important: is it correct?? :/ */
490	FREETMPS;
491
492	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
493	}
494
495	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
496	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
497		532
498	while (PL_curstackinfo)	533	while (PL_curstackinfo)
499	{	534	{
500	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
501		536
502	{ /*D*//*remove*/
503	dSP;
504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505	PUTBACK; /* possibly superfluous */
506	}
507
508	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
509	{
510	dounwind (-1);/*D*//*remove*/
511	SvREFCNT_dec (PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
512	}
513		539
514	Safefree (PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
515	Safefree (PL_curstackinfo);	541	Safefree (PL_curstackinfo);
516	PL_curstackinfo = p;	542	PL_curstackinfo = p;
517	}	543	}
518		544
519	Safefree (PL_tmps_stack);	545	Safefree (PL_tmps_stack);
520	Safefree (PL_markstack);	546	Safefree (PL_markstack);
521	Safefree (PL_scopestack);	547	Safefree (PL_scopestack);
522	Safefree (PL_savestack);	548	Safefree (PL_savestack);
523	#if PERL_VERSION < 9	549	#if !PERL_VERSION_ATLEAST (5,9,0)
524	Safefree (PL_retstack);	550	Safefree (PL_retstack);
525	#endif	551	#endif
526	}	552	}
527		553
528	static void	554	static size_t
529	setup_coro (struct coro *coro)	555	coro_rss (pTHX_ struct coro *coro)
		556	{
		557	size_t rss = sizeof (*coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
		562	{
		563	#define VAR(name,type)coro->name = PL_ ## name;
		564	# include "state.h"
		565	#undef VAR
		566	}
		567
		568	rss += sizeof (coro->curstackinfo);
		569	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
		576
		577	#if !PERL_VERSION_ATLEAST (5,9,0)
		578	rss += coro->retstack_max * sizeof (OP *);
		579	#endif
		580	}
		581
		582	return rss;
		583	}
		584
		585	/** coroutine stack handling ************************************************/
		586
		587	static void
		588	coro_setup (pTHX_ struct coro *coro)
530	{	589	{
531	/*	590	/*
532	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
533	*/	592	*/
534	dTHX;	593	coro_init_stacks (aTHX);
		594
		595	PL_runops = RUNOPS_DEFAULT;
		596	PL_curcop = &PL_compiling;
		597	PL_in_eval = EVAL_NULL;
		598	PL_comppad = 0;
		599	PL_curpm = 0;
		600	PL_localizing = 0;
		601	PL_dirty = 0;
		602	PL_restartop = 0;
		603
		604	GvSV (PL_defgv) = NEWSV (0, 0);
		605	GvAV (PL_defgv) = coro->args; coro->args = 0;
		606	GvSV (PL_errgv) = NEWSV (0, 0);
		607	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		608	PL_rs = newSVsv (GvSV (irsgv));
		609	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		610
		611	{
		612	dSP;
		613	LOGOP myop;
		614
		615	Zero (&myop, 1, LOGOP);
		616	myop.op_next = Nullop;
		617	myop.op_flags = OPf_WANT_VOID;
		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
		622	PL_op = (OP *)&myop;
		623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		624	SPAGAIN;
		625	}
		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
		630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
		664	free_coro_mortal (pTHX)
		665	{
		666	if (coro_mortal)
		667	{
		668	SvREFCNT_dec (coro_mortal);
		669	coro_mortal = 0;
		670	}
		671	}
		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV **bot, **top;
		691	AV *av = newAV (); /* return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
		799	static void NOINLINE
		800	prepare_cctx (pTHX_ coro_cctx *cctx)
		801	{
535	dSP;	802	dSP;
536	UNOP myop;	803	LOGOP myop;
537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538		804
539	coro_init_stacks ();	805	PL_top_env = &PL_start_env;
540	/*PL_curcop = 0;*/
541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
542	SvREFCNT_dec (GvAV (PL_defgv));
543	GvAV (PL_defgv) = coro->args; coro->args = 0;
544		806
545	SPAGAIN;	807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
546		809
547	Zero (&myop, 1, UNOP);	810	Zero (&myop, 1, LOGOP);
548	myop.op_next = Nullop;	811	myop.op_next = PL_op;
549	myop.op_flags = OPf_WANT_VOID;	812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550		813
		814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		818	PUTBACK;
551	PL_op = (OP *)&myop;	819	PL_op = (OP *)&myop;
552
553	PUSHMARK(SP);
554	XPUSHs (sub_init);
555	PUTBACK;
556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557	SPAGAIN;	821	SPAGAIN;
558
559	ENTER; /* necessary e.g. for dounwind */
560	}	822	}
561		823
562	static void	824	/*
563	free_coro_mortal ()	825	* this is a _very_ stripped down perl interpreter ;)
564	{	826	*/
565	if (coro_mortal)
566	{
567	SvREFCNT_dec (coro_mortal);
568	coro_mortal = 0;
569	}
570	}
571
572	static void
573	prepare_cctx (coro_stack *cctx)
574	{
575	dSP;
576	UNOP myop;
577
578	Zero (&myop, 1, UNOP);
579	myop.op_next = PL_op;
580	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581
582	PUSHMARK(SP);
583	EXTEND (SP, 2);
584	PUSHs (newSViv (PTR2IV (cctx)));
585	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
586	PUTBACK;
587	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
588	SPAGAIN;
589	}
590
591	static void	827	static void
592	coro_run (void *arg)	828	coro_run (void *arg)
593	{	829	{
		830	dTHX;
		831
		832	/* coro_run is the alternative tail of transfer(), so unlock here. */
		833	UNLOCK;
		834
		835	/* we now skip the entersub that lead to transfer() */
		836	PL_op = PL_op->op_next;
		837
		838	/* inject a fake subroutine call to cctx_init */
		839	prepare_cctx (aTHX_ (coro_cctx *)arg);
		840
		841	/* somebody or something will hit me for both perl_run and PL_restartop */
		842	PL_restartop = PL_op;
		843	perl_run (PL_curinterp);
		844
594	/*	845	/*
595	* this is a _very_ stripped down perl interpreter ;)	846	* If perl-run returns we assume exit() was being called or the coro
		847	* fell off the end, which seems to be the only valid (non-bug)
		848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
596	*/	851	*/
597	UNLOCK;
598
599	PL_top_env = &PL_start_env;	852	PL_top_env = main_top_env;
600	prepare_cctx ((coro_stack *)arg);	853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
601
602	/* somebody will hit me for both perl_run and PL_restartop */
603	perl_run (PERL_GET_CONTEXT);
604
605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
606	abort ();
607	}	854	}
608		855
609	static coro_stack *	856	static coro_cctx *
610	stack_new ()	857	cctx_new ()
611	{	858	{
612	coro_stack *stack;	859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
613		862
		863	++cctx_count;
		864
614	New (0, stack, 1, coro_stack);	865	Newz (0, cctx, 1, coro_cctx);
615		866
616	#if HAVE_MMAP	867	#if HAVE_MMAP
617		868
618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
619	/* mmap suppsedly does allocate-on-write for us */	870	/* mmap supposedly does allocate-on-write for us */
620	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621		872
622	if (stack->sptr == (void *)-1)	873	if (cctx->sptr != (void *)-1)
623	{
624	perror ("FATAL: unable to mmap stack for coroutine");
625	_exit (EXIT_FAILURE);
626	}	874	{
627
628	# if STACKGUARD	875	# if CORO_STACKGUARD
629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
630	# endif	877	# endif
631		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
632	#else	879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
633		880	cctx->flags |= CC_MAPPED;
634	stack->ssize = STACKSIZE * (long)sizeof (long);
635	New (0, stack->sptr, STACKSIZE, long);
636
637	if (!stack->sptr)
638	{	881	}
		882	else
		883	#endif
		884	{
		885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
		887
		888	if (!cctx->sptr)
		889	{
639	perror (stderr, "FATAL: unable to malloc stack for coroutine");	890	perror ("FATAL: unable to allocate stack for coroutine");
640	_exit (EXIT_FAILURE);	891	_exit (EXIT_FAILURE);
641	}	892	}
642		893
643	#endif	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
644		897
		898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
646		900
647	return stack;	901	return cctx;
648	}	902	}
649		903
650	static void	904	static void
651	stack_free (coro_stack *stack)	905	cctx_destroy (coro_cctx *cctx)
652	{	906	{
653	if (!stack)	907	if (!cctx)
654	return;	908	return;
655		909
		910	--cctx_count;
		911
		912	#if CORO_USE_VALGRIND
		913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		914	#endif
		915
656	#if HAVE_MMAP	916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
657	munmap (stack->sptr, stack->ssize);	918	munmap (cctx->sptr, cctx->ssize);
658	#else
659	Safefree (stack->sptr);
660	#endif
661
662	Safefree (stack);
663	}
664
665	static coro_stack *stack_first;
666
667	static coro_stack *
668	stack_get ()
669	{
670	coro_stack *stack;
671
672	if (stack_first)
673	{
674	stack = stack_first;
675	stack_first = stack->next;
676	}
677	else	919	else
		920	#endif
		921	Safefree (cctx->sptr);
		922
		923	Safefree (cctx);
		924	}
		925
		926	static coro_cctx *
		927	cctx_get (pTHX)
		928	{
		929	while (cctx_first)
678	{	930	{
679	stack = stack_new ();	931	coro_cctx *cctx = cctx_first;
680	PL_op = PL_op->op_next;	932	cctx_first = cctx->next;
		933	--cctx_idle;
		934
		935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		936	return cctx;
		937
		938	cctx_destroy (cctx);
681	}	939	}
682		940
683	return stack;	941	return cctx_new ();
684	}	942	}
685		943
686	static void	944	static void
687	stack_put (coro_stack *stack)	945	cctx_put (coro_cctx *cctx)
688	{	946	{
689	stack->next = stack_first;	947	/* free another cctx if overlimit */
690	stack_first = stack;	948	if (cctx_idle >= MAX_IDLE_CCTX)
691	}	949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
692		953
693	/* never call directly, always through the coro_state_transfer global variable */	954	cctx_destroy (first);
694	static void	955	}
		956
		957	++cctx_idle;
		958	cctx->next = cctx_first;
		959	cctx_first = cctx;
		960	}
		961
		962	/** coroutine switching *****************************************************/
		963
		964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
695	transfer_impl (struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
696	{	986	{
697	dSTACKLEVEL;	987	dSTACKLEVEL;
698		988
699	/* sometimes transfer is only called to set idle_sp */	989	/* sometimes transfer is only called to set idle_sp */
700	if (flags == TRANSFER_SET_STACKLEVEL)	990	if (!next)
		991	{
701	((coro_stack *)prev)->idle_sp = STACKLEVEL;	992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		994	}
702	else if (prev != next)	995	else if (prev != next)
703	{	996	{
704	coro_stack *prev__stack;	997	coro_cctx *prev__cctx;
		998
		999	if (prev->flags & CF_NEW)
		1000	{
		1001	/* create a new empty context */
		1002	Newz (0, prev->cctx, 1, coro_cctx);
		1003	prev->flags &= ~CF_NEW;
		1004	prev->flags |= CF_RUNNING;
		1005	}
		1006
		1007	prev->flags &= ~CF_RUNNING;
		1008	next->flags |= CF_RUNNING;
705		1009
706	LOCK;	1010	LOCK;
707		1011
708	if (next->mainstack)	1012	if (next->flags & CF_NEW)
709	{	1013	{
710	/* coroutine already started */	1014	/* need to start coroutine */
711	SAVE (prev, flags);	1015	next->flags &= ~CF_NEW;
712	LOAD (next);	1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
713	}	1020	}
714	else	1021	else
715	{	1022	{
716	/* need to start coroutine */	1023	/* coroutine already started */
717	/* first get rid of the old state */	1024	save_perl (aTHX_ prev);
718	SAVE (prev, -1);	1025	load_perl (aTHX_ next);
719	/* setup coroutine call */
720	setup_coro (next);
721	/* need a stack */
722	next->stack = 0;
723	}	1026	}
724		1027
725	if (!prev->stack)
726	/* create a new empty context */
727	Newz (0, prev->stack, 1, coro_stack);
728
729	prev__stack = prev->stack;	1028	prev__cctx = prev->cctx;
730		1029
731	/* possibly "free" the stack */	1030	/* possibly "free" the cctx */
732	if (prev__stack->idle_sp == STACKLEVEL)	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
733	{	1032	{
734	stack_put (prev__stack);	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1035
735	prev->stack = 0;	1036	prev->cctx = 0;
		1037
		1038	cctx_put (prev__cctx);
736	}	1039	}
737		1040
		1041	++next->usecount;
		1042
738	if (!next->stack)	1043	if (!next->cctx)
739	next->stack = stack_get ();	1044	next->cctx = cctx_get (aTHX);
740		1045
741	if (prev__stack != next->stack)	1046	if (prev__cctx != next->cctx)
742	{	1047	{
743	prev__stack->top_env = PL_top_env;	1048	prev__cctx->top_env = PL_top_env;
744	PL_top_env = next->stack->top_env;	1049	PL_top_env = next->cctx->top_env;
745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
746	}	1051	}
747		1052
748	free_coro_mortal ();	1053	free_coro_mortal (aTHX);
749
750	UNLOCK;	1054	UNLOCK;
751	}	1055	}
752	}	1056	}
753		1057
754	/* use this function pointer to call the above function */
755	/* this is done to increase chances of the compiler not inlining the call */
756	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759	struct transfer_args	1058	struct transfer_args
760	{	1059	{
761	struct coro *prev, *next;	1060	struct coro *prev, *next;
762	int flags;
763	};	1061	};
764		1062
765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
766		1065
		1066	/** high level stuff ********************************************************/
		1067
767	static void	1068	static int
768	coro_state_destroy (struct coro *coro)	1069	coro_state_destroy (pTHX_ struct coro *coro)
769	{	1070	{
770	if (coro->refcnt--)	1071	if (coro->flags & CF_DESTROYED)
771	return;	1072	return 0;
		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
		1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
772		1086
773	if (coro->mainstack && coro->mainstack != main_mainstack)	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
774	{	1088	{
775	struct coro temp;	1089	struct coro temp;
776		1090
777	SAVE ((&temp), TRANSFER_SAVE_ALL);	1091	if (coro->flags & CF_RUNNING)
778	LOAD (coro);	1092	croak ("FATAL: tried to destroy currently running coroutine");
779		1093
780	destroy_stacks ();	1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
781		1096
		1097	coro_destroy (aTHX_ coro);
		1098
782	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
783		1100
784	coro->mainstack = 0;	1101	coro->mainstack = 0;
785	}	1102	}
786		1103
787	stack_free (coro->stack);	1104	cctx_destroy (coro->cctx);
788	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
789	Safefree (coro);	1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
790	}	1112	}
791		1113
792	static int	1114	static int
793	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
794	{	1116	{
795	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
796	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
797		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
798	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
799		1127
800	return 0;	1128	return 0;
801	}	1129	}
802		1130
803	static int	1131	static int
…		…
808	++coro->refcnt;	1136	++coro->refcnt;
809		1137
810	return 0;	1138	return 0;
811	}	1139	}
812		1140
813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1141	static MGVTBL coro_state_vtbl = {
		1142	0, 0, 0, 0,
		1143	coro_state_free,
		1144	0,
		1145	#ifdef MGf_DUP
		1146	coro_state_dup,
		1147	#else
		1148	# define MGf_DUP 0
		1149	#endif
		1150	};
814		1151
815	static struct coro *
816	SvSTATE (SV *coro)
817	{
818	HV *stash;
819	MAGIC *mg;
820
821	if (SvROK (coro))
822	coro = SvRV (coro);
823
824	stash = SvSTASH (coro);
825	if (stash != coro_stash && stash != coro_state_stash)
826	{
827	/* very slow, but rare, check */
828	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829	croak ("Coro::State object required");
830	}
831
832	mg = SvMAGIC (coro);
833	assert (mg->mg_type == PERL_MAGIC_ext);
834	return (struct coro *)mg->mg_ptr;
835	}
836
837	static void	1152	static void
838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839	{	1154	{
840	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
841	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
842	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
843	}	1158	}
844		1159
845	static void	1160	static void
846	api_transfer (SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
847	{	1162	{
848	dTHX;	1163	dTHX;
849	struct transfer_args ta;	1164	struct transfer_args ta;
850		1165
851	prepare_transfer (&ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
852	TRANSFER (ta);	1167	TRANSFER (ta);
853	}	1168	}
854		1169
855	/** Coro ********************************************************************/	1170	/** Coro ********************************************************************/
856		1171
857	#define PRIO_MAX 3
858	#define PRIO_HIGH 1
859	#define PRIO_NORMAL 0
860	#define PRIO_LOW -1
861	#define PRIO_IDLE -3
862	#define PRIO_MIN -4
863
864	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;
866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;
868
869	static void	1172	static void
870	coro_enq (SV *sv)	1173	coro_enq (pTHX_ SV *coro_sv)
871	{	1174	{
872	int prio;
873
874	if (SvTYPE (sv) != SVt_PVHV)
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877	prio = SvSTATE (sv)->prio;
878
879	av_push (coro_ready [prio - PRIO_MIN], sv);	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
880	coro_nready++;
881	}	1176	}
882		1177
883	static SV *	1178	static SV *
884	coro_deq (int min_prio)	1179	coro_deq (pTHX_ int min_prio)
885	{	1180	{
886	int prio = PRIO_MAX - PRIO_MIN;	1181	int prio = PRIO_MAX - PRIO_MIN;
887		1182
888	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
889	if (min_prio < 0)	1184	if (min_prio < 0)
890	min_prio = 0;	1185	min_prio = 0;
891		1186
892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893	if (AvFILLp (coro_ready [prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
894	{
895	coro_nready--;
896	return av_shift (coro_ready [prio]);	1189	return av_shift (coro_ready [prio]);
897	}
898		1190
899	return 0;	1191	return 0;
900	}	1192	}
901		1193
902	static void	1194	static int
903	api_ready (SV *coro)	1195	api_ready (SV *coro_sv)
904	{	1196	{
905	dTHX;	1197	dTHX;
		1198	struct coro *coro;
906		1199
907	if (SvROK (coro))	1200	if (SvROK (coro_sv))
908	coro = SvRV (coro);	1201	coro_sv = SvRV (coro_sv);
		1202
		1203	coro = SvSTATE (coro_sv);
		1204
		1205	if (coro->flags & CF_READY)
		1206	return 0;
		1207
		1208	coro->flags |= CF_READY;
909		1209
910	LOCK;	1210	LOCK;
911	coro_enq (SvREFCNT_inc (coro));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
912	UNLOCK;	1213	UNLOCK;
913	}
914		1214
		1215	return 1;
		1216	}
		1217
915	static void	1218	static int
		1219	api_is_ready (SV *coro_sv)
		1220	{
		1221	dTHX;
		1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1223	}
		1224
		1225	static void
916	prepare_schedule (struct transfer_args *ta)	1226	prepare_schedule (pTHX_ struct transfer_args *ta)
917	{	1227	{
918	SV *current, *prev, *next;	1228	SV *prev_sv, *next_sv;
919
920	current = GvSV (coro_current);
921		1229
922	for (;;)	1230	for (;;)
923	{	1231	{
924	LOCK;	1232	LOCK;
925	next = coro_deq (PRIO_MIN);	1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
926	UNLOCK;	1265	UNLOCK;
927
928	if (next)
929	break;	1266	break;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}	1267	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948		1268
949	/* free this only after the transfer */	1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
950	LOCK;	1277	LOCK;
951	free_coro_mortal ();	1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
952	UNLOCK;	1280	UNLOCK;
953	coro_mortal = prev;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958	}	1281	}
959		1282
960	static void	1283	static void
961	prepare_cede (struct transfer_args *ta)	1284	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1285	{
963	LOCK;	1286	api_ready (coro_current);
964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
968	}	1302	}
969		1303
970	static void	1304	static void
971	api_schedule (void)	1305	api_schedule (void)
972	{	1306	{
973	dTHX;	1307	dTHX;
974	struct transfer_args ta;	1308	struct transfer_args ta;
975		1309
976	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1311	TRANSFER (ta);
978	}	1312	}
979		1313
980	static void	1314	static int
981	api_cede (void)	1315	api_cede (void)
982	{	1316	{
983	dTHX;	1317	dTHX;
984	struct transfer_args ta;	1318	struct transfer_args ta;
985		1319
986	prepare_cede (&ta);	1320	prepare_cede (aTHX_ &ta);
		1321
		1322	if (ta.prev != ta.next)
		1323	{
987	TRANSFER (ta);	1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
988	}	1329	}
989		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
990	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1373
992	PROTOTYPES: DISABLE	1374	PROTOTYPES: DISABLE
993		1375
994	BOOT:	1376	BOOT:
995	{	1377	{
996	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
998	#endif	1380	#endif
999	BOOT_PAGESIZE;	1381	BOOT_PAGESIZE;
1000		1382
		1383	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1384	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1385
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1386	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1387
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1391	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1392
1007	main_mainstack = PL_mainstack;	1393	main_mainstack = PL_mainstack;
		1394	main_top_env = PL_top_env;
		1395
		1396	while (main_top_env->je_prev)
		1397	main_top_env = main_top_env->je_prev;
1008		1398
1009	coroapi.ver = CORO_API_VERSION;	1399	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1400	coroapi.transfer = api_transfer;
1011		1401
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1402	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1019	struct coro *coro;	1409	struct coro *coro;
1020	HV *hv;	1410	HV *hv;
1021	int i;	1411	int i;
1022		1412
1023	Newz (0, coro, 1, struct coro);	1413	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1414	coro->args = newAV ();
		1415	coro->flags = CF_NEW;
1025		1416
		1417	if (coro_first) coro_first->prev = coro;
		1418	coro->next = coro_first;
		1419	coro_first = coro;
		1420
1026	hv = newHV ();	1421	coro->hv = hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1422	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1423	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1424
1030	for (i = 1; i < items; i++)	1425	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1426	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1427	}
1036	OUTPUT:	1428	OUTPUT:
1037	RETVAL	1429	RETVAL
1038		1430
		1431	# these not obviously related functions are all rolled into the same xs
		1432	# function to increase chances that they all will call transfer with the same
		1433	# stack offset
1039	void	1434	void
1040	_set_stacklevel (...)	1435	_set_stacklevel (...)
1041	ALIAS:	1436	ALIAS:
1042	Coro::State::transfer = 1	1437	Coro::State::transfer = 1
1043	Coro::schedule = 2	1438	Coro::schedule = 2
1044	Coro::cede = 3	1439	Coro::cede = 3
1045	Coro::Cont::yield = 4	1440	Coro::cede_notself = 4
1046	CODE:	1441	CODE:
1047	{	1442	{
1048	struct transfer_args ta;	1443	struct transfer_args ta;
1049		1444
1050	switch (ix)	1445	switch (ix)
1051	{	1446	{
1052	case 0:	1447	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1448	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1449	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1450	break;
1057		1451
1058	case 1:	1452	case 1:
1059	if (items != 3)	1453	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1454	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1455
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1456	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1457	break;
1064		1458
1065	case 2:	1459	case 2:
1066	prepare_schedule (&ta);	1460	prepare_schedule (aTHX_ &ta);
1067	break;	1461	break;
1068		1462
1069	case 3:	1463	case 3:
1070	prepare_cede (&ta);	1464	prepare_cede (aTHX_ &ta);
1071	break;	1465	break;
1072		1466
1073	case 4:	1467	case 4:
1074	{	1468	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1469	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1470
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1471	break;
1098
1099	}	1472	}
1100		1473
		1474	BARRIER;
1101	TRANSFER (ta);	1475	TRANSFER (ta);
1102	}
1103		1476
1104	void	1477	if (GIMME_V != G_VOID && ta.next != ta.prev)
1105	_clone_state_from (SV *dst, SV *src)	1478	XSRETURN_YES;
		1479	}
		1480
		1481	bool
		1482	_destroy (SV *coro_sv)
1106	CODE:	1483	CODE:
1107	{	1484	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1485	OUTPUT:
1109		1486	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1487
1122	void	1488	void
1123	_exit (code)	1489	_exit (code)
1124	int code	1490	int code
1125	PROTOTYPE: $	1491	PROTOTYPE: $
1126	CODE:	1492	CODE:
1127	_exit (code);	1493	_exit (code);
1128		1494
		1495	int
		1496	cctx_stacksize (int new_stacksize = 0)
		1497	CODE:
		1498	RETVAL = coro_stacksize;
		1499	if (new_stacksize)
		1500	coro_stacksize = new_stacksize;
		1501	OUTPUT:
		1502	RETVAL
		1503
		1504	int
		1505	cctx_count ()
		1506	CODE:
		1507	RETVAL = cctx_count;
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	int
		1512	cctx_idle ()
		1513	CODE:
		1514	RETVAL = cctx_idle;
		1515	OUTPUT:
		1516	RETVAL
		1517
		1518	void
		1519	list ()
		1520	PPCODE:
		1521	{
		1522	struct coro *coro;
		1523	for (coro = coro_first; coro; coro = coro->next)
		1524	if (coro->hv)
		1525	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1526	}
		1527
		1528	void
		1529	call (Coro::State coro, SV *coderef)
		1530	ALIAS:
		1531	eval = 1
		1532	CODE:
		1533	{
		1534	if (coro->mainstack)
		1535	{
		1536	struct coro temp;
		1537	Zero (&temp, 1, struct coro);
		1538
		1539	if (!(coro->flags & CF_RUNNING))
		1540	{
		1541	save_perl (aTHX_ &temp);
		1542	load_perl (aTHX_ coro);
		1543	}
		1544
		1545	{
		1546	dSP;
		1547	ENTER;
		1548	SAVETMPS;
		1549	PUSHMARK (SP);
		1550	PUTBACK;
		1551	if (ix)
		1552	eval_sv (coderef, 0);
		1553	else
		1554	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1555	SPAGAIN;
		1556	FREETMPS;
		1557	LEAVE;
		1558	PUTBACK;
		1559	}
		1560
		1561	if (!(coro->flags & CF_RUNNING))
		1562	{
		1563	save_perl (aTHX_ coro);
		1564	load_perl (aTHX_ &temp);
		1565	}
		1566	}
		1567	}
		1568
		1569	SV *
		1570	is_ready (Coro::State coro)
		1571	PROTOTYPE: $
		1572	ALIAS:
		1573	is_ready = CF_READY
		1574	is_running = CF_RUNNING
		1575	is_new = CF_NEW
		1576	is_destroyed = CF_DESTROYED
		1577	CODE:
		1578	RETVAL = boolSV (coro->flags & ix);
		1579	OUTPUT:
		1580	RETVAL
		1581
		1582	void
		1583	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1584
		1585	SV *
		1586	has_stack (Coro::State coro)
		1587	PROTOTYPE: $
		1588	CODE:
		1589	RETVAL = boolSV (!!coro->cctx);
		1590	OUTPUT:
		1591	RETVAL
		1592
		1593	int
		1594	is_traced (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	IV
		1602	rss (Coro::State coro)
		1603	PROTOTYPE: $
		1604	ALIAS:
		1605	usecount = 1
		1606	CODE:
		1607	switch (ix)
		1608	{
		1609	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1610	case 1: RETVAL = coro->usecount; break;
		1611	}
		1612	OUTPUT:
		1613	RETVAL
		1614
		1615
1129	MODULE = Coro::State PACKAGE = Coro	1616	MODULE = Coro::State PACKAGE = Coro
1130		1617
1131	BOOT:	1618	BOOT:
1132	{	1619	{
1133	int i;	1620	int i;
		1621
		1622	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1623	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1624	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1625
		1626	coro_current = get_sv ("Coro::current", FALSE);
		1627	SvREADONLY_on (coro_current);
1134		1628
1135	coro_stash = gv_stashpv ("Coro", TRUE);	1629	coro_stash = gv_stashpv ("Coro", TRUE);
1136		1630
1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1631	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1632	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1633	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1634	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1635	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1636	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1637
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1638	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1639	coro_ready[i] = newAV ();
1149		1640
1150	{	1641	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1642	SV *sv = perl_get_sv("Coro::API", 1);
1152		1643
1153	coroapi.schedule = api_schedule;	1644	coroapi.schedule = api_schedule;
1154	coroapi.cede = api_cede;	1645	coroapi.cede = api_cede;
		1646	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1647	coroapi.ready = api_ready;
		1648	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1649	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1650	coroapi.current = coro_current;
1158		1651
1159	GCoroAPI = &coroapi;	1652	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1653	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1654	SvREADONLY_on (sv);
1162	}	1655	}
1163	}	1656	}
		1657
		1658	void
		1659	_set_current (SV *current)
		1660	PROTOTYPE: $
		1661	CODE:
		1662	SvREFCNT_dec (SvRV (coro_current));
		1663	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1664
1165	int	1665	int
1166	prio (Coro::State coro, int newprio = 0)	1666	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1667	ALIAS:
1168	nice = 1	1668	nice = 1
…		…
1171	RETVAL = coro->prio;	1671	RETVAL = coro->prio;
1172		1672
1173	if (items > 1)	1673	if (items > 1)
1174	{	1674	{
1175	if (ix)	1675	if (ix)
1176	newprio += coro->prio;	1676	newprio = coro->prio - newprio;
1177		1677
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1678	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1679	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1680
1181	coro->prio = newprio;	1681	coro->prio = newprio;
1182	}	1682	}
1183	}	1683	}
		1684	OUTPUT:
		1685	RETVAL
1184		1686
1185	void	1687	SV *
1186	ready (SV *self)	1688	ready (SV *self)
1187	PROTOTYPE: $	1689	PROTOTYPE: $
1188	CODE:	1690	CODE:
1189	api_ready (self);	1691	RETVAL = boolSV (api_ready (self));
		1692	OUTPUT:
		1693	RETVAL
1190		1694
1191	int	1695	int
1192	nready (...)	1696	nready (...)
1193	PROTOTYPE:	1697	PROTOTYPE:
1194	CODE:	1698	CODE:
1195	RETVAL = coro_nready;	1699	RETVAL = coro_nready;
1196	OUTPUT:	1700	OUTPUT:
1197	RETVAL	1701	RETVAL
1198		1702
		1703	# for async_pool speedup
		1704	void
		1705	_pool_1 (SV *cb)
		1706	CODE:
		1707	{
		1708	struct coro *coro = SvSTATE (coro_current);
		1709	HV *hv = (HV *)SvRV (coro_current);
		1710	AV *defav = GvAV (PL_defgv);
		1711	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1712	AV *invoke_av;
		1713	int i, len;
		1714
		1715	if (!invoke)
		1716	croak ("\3terminate\2\n");
		1717
		1718	SvREFCNT_dec (coro->saved_deffh);
		1719	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1720
		1721	hv_store (hv, "desc", sizeof ("desc") - 1,
		1722	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1723
		1724	invoke_av = (AV *)SvRV (invoke);
		1725	len = av_len (invoke_av);
		1726
		1727	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1728
		1729	if (len > 0)
		1730	{
		1731	av_fill (defav, len - 1);
		1732	for (i = 0; i < len; ++i)
		1733	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1734	}
		1735
		1736	SvREFCNT_dec (invoke);
		1737	}
		1738
		1739	void
		1740	_pool_2 (SV *cb)
		1741	CODE:
		1742	{
		1743	struct coro *coro = SvSTATE (coro_current);
		1744
		1745	sv_setsv (cb, &PL_sv_undef);
		1746
		1747	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1748	coro->saved_deffh = 0;
		1749
		1750	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1751	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1752	croak ("\3terminate\2\n");
		1753
		1754	av_clear (GvAV (PL_defgv));
		1755	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1757
		1758	coro->prio = 0;
		1759
		1760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1761	api_trace (coro_current, 0);
		1762
		1763	av_push (av_async_pool, newSVsv (coro_current));
		1764	}
		1765
		1766
1199	MODULE = Coro::State PACKAGE = Coro::AIO	1767	MODULE = Coro::State PACKAGE = Coro::AIO
1200		1768
1201	SV *	1769	SV *
1202	_get_state ()	1770	_get_state ()
1203	CODE:	1771	CODE:
1204	{	1772	{
1205	struct {	1773	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1774
		1775	RETVAL = newSV (sizeof (struct io_state));
		1776	data = (struct io_state *)SvPVX (RETVAL);
		1777	SvCUR_set (RETVAL, sizeof (struct io_state));
		1778	SvPOK_only (RETVAL);
		1779
1212	data.errorno = errno;	1780	data->errorno = errno;
1213	data.laststype = PL_laststype;	1781	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1782	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1783	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1784	}
1219	OUTPUT:	1785	OUTPUT:
1220	RETVAL	1786	RETVAL
1221		1787
1222	void	1788	void
1223	_set_state (char *data_)	1789	_set_state (char *data_)
1224	PROTOTYPE: $	1790	PROTOTYPE: $
1225	CODE:	1791	CODE:
1226	{	1792	{
1227	struct {	1793	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1794
1234	errno = data->errorno;	1795	errno = data->errorno;
1235	PL_laststype = data->laststype;	1796	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1797	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1798	PL_statcache = data->statcache;
1238	}	1799	}
		1800

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