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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.173 by root, Sun Sep 30 13:41:45 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 <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
61	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* 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. */
66	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
		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
71	#include "CoroAPI.h"	110	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		111
75	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	116	#else
80	# define LOCK (void)0	117	# define LOCK (void)0
81	# define UNLOCK (void)0	118	# define UNLOCK (void)0
82	#endif	119	#endif
83		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
88		136
		137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
		153
89	/* this is a structure representing a c-level coroutine */	154	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	155	typedef struct coro_cctx {
91	struct coro_stack *next;	156	struct coro_cctx *next;
92		157
93	/* the stack */	158	/* the stack */
94	void *sptr;	159	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
96		161
97	/* cpu state */	162	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	165	JMPENV *top_env;
100	coro_context cctx;	166	coro_context cctx;
101	} coro_stack;
102		167
103	/* the (fake) coro_stack representing the main program */	168	#if CORO_USE_VALGRIND
104	static coro_stack *main_stack;	169	int valgrind_id;
		170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
105		180
106	/* this is a structure representing a perl-level coroutine */	181	/* this is a structure representing a perl-level coroutine */
107	struct coro {	182	struct coro {
108	/* the c coroutine allocated to this perl coroutine, if any */	183	/* the c coroutine allocated to this perl coroutine, if any */
109	coro_stack *stack;	184	coro_cctx *cctx;
110		185
111	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
112	AV *args;	187	AV *args;
113	int refcnt;	188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
114		191
115	/* optionally saved, might be zero */	192	/* optionally saved, might be zero */
116	AV *defav;	193	AV *defav; /* @_ */
117	SV *defsv;	194	SV *defsv; /* $_ */
118	SV *errsv;	195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
119		199
120	/* saved global state not related to stacks */	200	#define VAR(name,type) type name;
121	U8 dowarn;	201	# include "state.h"
122	I32 in_eval;	202	#undef VAR
123		203
124	/* the stacks and related info (callchain etc..) */	204	/* statistics */
125	PERL_SI *curstackinfo;	205	int usecount; /* number of switches to this coro */
126	AV *curstack;
127	AV *mainstack;
128	SV **stack_sp;
129	OP *op;
130	SV **curpad;
131	AV *comppad;
132	CV *compcv;
133	SV **stack_base;
134	SV **stack_max;
135	SV **tmps_stack;
136	I32 tmps_floor;
137	I32 tmps_ix;
138	I32 tmps_max;
139	I32 *markstack;
140	I32 *markstack_ptr;
141	I32 *markstack_max;
142	I32 *scopestack;
143	I32 scopestack_ix;
144	I32 scopestack_max;
145	ANY *savestack;
146	I32 savestack_ix;
147	I32 savestack_max;
148	OP **retstack;
149	I32 retstack_ix;
150	I32 retstack_max;
151	PMOP *curpm;
152	COP *curcop;
153		206
154	/* coro process data */	207	/* coro process data */
155	int prio;	208	int prio;
		209
		210	/* linked list */
		211	struct coro *next, *prev;
		212	HV *hv; /* the perl hash associated with this coro, if any */
156	};	213	};
157		214
158	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
160		217
		218	/** Coro ********************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/** lowlevel stuff **********************************************************/
		234
161	static AV *	235	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
163	{	237	{
164	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	239	AV *newpadlist, *newpad;
166		240
167	newpadlist = newAV ();	241	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	242	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	243	#if PERL_VERSION_ATLEAST (5,9,0)
		244	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		245	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	246	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	247	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	248	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	249	--AvFILLp (padlist);
176		250
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	251	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
221		295
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	296	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		297
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	298	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		299
		300	#define CORO_MAGIC(cv) \
		301	SvMAGIC (cv) \
		302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		303	? SvMAGIC (cv) \
		304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		305	: 0
		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
226	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
227	static void	334	static void
228	get_padlist (pTHX_ CV *cv)	335	get_padlist (pTHX_ CV *cv)
229	{	336	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	337	MAGIC *mg = CORO_MAGIC (cv);
		338	AV *av;
231		339
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	342	else
235	{	343	{
236	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	345	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	346	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
242	#else	350	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	354	}
247		355
248	static void	356	static void
249	put_padlist (pTHX_ CV *cv)	357	put_padlist (pTHX_ CV *cv)
250	{	358	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	359	MAGIC *mg = CORO_MAGIC (cv);
		360	AV *av;
252		361
253	if (!mg)	362	if (!mg)
254	{	363	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	364	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	365	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	366	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	367	mg->mg_obj = (SV *)newAV ();
259	}	368	}
260		369
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	370	av = (AV *)mg->mg_obj;
		371
		372	if (AvFILLp (av) >= AvMAX (av))
		373	av_extend (av, AvMAX (av) + 1);
		374
		375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
262	}	376	}
		377
		378	/** load & save, init *******************************************************/
263		379
264	#define SB do {	380	#define SB do {
265	#define SE } while (0)	381	#define SE } while (0)
266		382
267	#define LOAD(state) load_state(aTHX_ (state));
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
269
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
271		384
272	static void	385	static void
273	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
274	{	387	{
275	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
276	PL_in_eval = c->in_eval;	389	# include "state.h"
277		390	#undef VAR
278	PL_curstackinfo = c->curstackinfo;
279	PL_curstack = c->curstack;
280	PL_mainstack = c->mainstack;
281	PL_stack_sp = c->stack_sp;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308		391
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
312		411
313	{	412	{
314	dSP;	413	dSP;
315	CV *cv;	414	CV *cv;
316		415
317	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
319	{	418	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	420	CvDEPTH (cv) = PTR2IV (POPs);
326	}	421	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	422	}
330		423
331	PUTBACK;	424	PUTBACK;
332	}	425	}
333	}	426	}
334		427
335	static void	428	static void
336	save_state(pTHX_ Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
337	{	430	{
338	{	431	{
339	dSP;	432	dSP;
340	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	437	/*
345	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
347	*/	440	*/
348		441
349	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
351	for (;;)	444	for (;;)
352	{	445	{
353	while (cxix >= 0)	446	while (cxix >= 0)
354	{	447	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
356		449
357	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
358	{	451	{
359	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
		453
360	if (CvDEPTH(cv))	454	if (CvDEPTH (cv))
361	{	455	{
362	EXTEND (SP, CvDEPTH(cv)*2);	456	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));	457	PUSHs ((SV *)CvPADLIST (cv));
		458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
373		460
		461	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	462	get_padlist (aTHX_ cv);
375	}	463	}
376	}	464	}
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	}	465	}
386		466
387	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
388	break;	468	break;
389		469
390	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
393	}	473	}
394		474
395	PUTBACK;	475	PUTBACK;
396	}	476	}
397		477
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401		483
402	c->dowarn = PL_dowarn;	484	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	485	# include "state.h"
404		486	#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	}	487	}
436		488
437	/*	489	/*
438	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
440	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
441	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
442	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
443	static void	498	static void
444	coro_init_stacks (pTHX)	499	coro_init_stacks (pTHX)
445	{	500	{
446	LOCK;	501	PL_curstackinfo = new_stackinfo(64, 6);
447
448	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
450	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
451	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452		505
453	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
454	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
455	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456		509
457	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
458	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
459	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
460	PL_tmps_max = 96;	513	PL_tmps_max = 64;
461		514
462	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
463	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
464	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
465		518
…		…
469		522
470	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
471	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
472	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
473		526
474	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
475	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
476	PL_savestack_max = 96;	529	PL_savestack_max = 64;
477		530
478	#if PERL_VERSION < 9	531	#if !PERL_VERSION_ATLEAST (5,9,0)
479	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
480	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
481	PL_retstack_max = 8;	534	PL_retstack_max = 4;
482	#endif	535	#endif
483
484	UNLOCK;
485	}	536	}
		537	#endif
486		538
487	/*	539	/*
488	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
489	*/	541	*/
490	static void	542	static void
491	destroy_stacks(pTHX)	543	coro_destroy_stacks (pTHX)
492	{	544	{
493	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
494	{	546	{
495	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
496	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
497		550
498	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
499	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
500		554
		555	/* unwind all extra stacks */
501	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
502	}	560	}
503		561
504	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
505	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
506		564
507	while (PL_curstackinfo)	565	while (PL_curstackinfo)
508	{	566	{
509	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
510		568
511	{ /*D*//*remove*/
512	dSP;
513	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514	PUTBACK; /* possibly superfluous */
515	}
516
517	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
518	{
519	dounwind (-1);/*D*//*remove*/
520	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
521	}
522		571
523	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	574	PL_curstackinfo = p;
526	}	575	}
527		576
528	Safefree (PL_tmps_stack);	577	Safefree (PL_tmps_stack);
529	Safefree (PL_markstack);	578	Safefree (PL_markstack);
530	Safefree (PL_scopestack);	579	Safefree (PL_scopestack);
531	Safefree (PL_savestack);	580	Safefree (PL_savestack);
532	#if PERL_VERSION < 9	581	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree (PL_retstack);	582	Safefree (PL_retstack);
534	#endif	583	#endif
535	}	584	}
536		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/** coroutine stack handling ************************************************/
		618
537	static void	619	static void
538	setup_coro (struct coro *coro)	620	setup_coro (pTHX_ struct coro *coro)
539	{	621	{
540	/*	622	/*
541	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
542	*/	624	*/
543	dTHX;	625	coro_init_stacks (aTHX);
		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
		631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
		635
		636	{
		637	dSP;
		638	LOGOP myop;
		639
		640	SvREFCNT_dec (GvAV (PL_defgv));
		641	GvAV (PL_defgv) = coro->args; coro->args = 0;
		642
		643	Zero (&myop, 1, LOGOP);
		644	myop.op_next = Nullop;
		645	myop.op_flags = OPf_WANT_VOID;
		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
		650	PL_op = (OP *)&myop;
		651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		652	SPAGAIN;
		653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
		656	}
		657
		658	static void
		659	free_coro_mortal (pTHX)
		660	{
		661	if (coro_mortal)
		662	{
		663	SvREFCNT_dec (coro_mortal);
		664	coro_mortal = 0;
		665	}
		666	}
		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV **bot, **top;
		686	AV *av = newAV (); /* return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
		794	static void NOINLINE
		795	prepare_cctx (pTHX_ coro_cctx *cctx)
		796	{
544	dSP;	797	dSP;
545	UNOP myop;	798	LOGOP myop;
546	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547		799
548	coro_init_stacks (aTHX);	800	PL_top_env = &PL_start_env;
549	/*PL_curcop = 0;*/
550	/*PL_in_eval = PL_in_eval;*/ /* inherit */
551	SvREFCNT_dec (GvAV (PL_defgv));
552	GvAV (PL_defgv) = coro->args; coro->args = 0;
553		801
554	SPAGAIN;	802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
555		804
556	Zero (&myop, 1, UNOP);	805	Zero (&myop, 1, LOGOP);
557	myop.op_next = Nullop;	806	myop.op_next = PL_op;
558	myop.op_flags = OPf_WANT_VOID;	807	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559		808
		809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		813	PUTBACK;
560	PL_op = (OP *)&myop;	814	PL_op = (OP *)&myop;
561
562	PUSHMARK(SP);
563	XPUSHs (sub_init);
564	PUTBACK;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	816	SPAGAIN;
567
568	ENTER; /* necessary e.g. for dounwind */
569	}	817	}
570		818
571	static void	819	/*
572	free_coro_mortal ()	820	* this is a _very_ stripped down perl interpreter ;)
573	{	821	*/
574	if (coro_mortal)
575	{
576	SvREFCNT_dec (coro_mortal);
577	coro_mortal = 0;
578	}
579	}
580
581	static void	822	static void
582	coro_run (void *arg)	823	coro_run (void *arg)
583	{	824	{
		825	dTHX;
		826
		827	/* coro_run is the alternative tail of transfer(), so unlock here. */
		828	UNLOCK;
		829
		830	/* we now skip the entersub that lead to transfer() */
		831	PL_op = PL_op->op_next;
		832
		833	/* inject a fake subroutine call to cctx_init */
		834	prepare_cctx (aTHX_ (coro_cctx *)arg);
		835
		836	/* somebody or something will hit me for both perl_run and PL_restartop */
		837	PL_restartop = PL_op;
		838	perl_run (PL_curinterp);
		839
584	/*	840	/*
585	* this is a _very_ stripped down perl interpreter ;)	841	* If perl-run returns we assume exit() was being called or the coro
		842	* fell off the end, which seems to be the only valid (non-bug)
		843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
586	*/	846	*/
587	dTHX;
588	int ret;
589
590	UNLOCK;
591
592	PL_top_env = &PL_start_env;	847	PL_top_env = main_top_env;
593		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597	/* continue at cctx_init, without entersub */
598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600	/* somebody will hit me for both perl_run and PL_restartop */
601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602	printf ("ret %d\n", ret);//D
603
604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605	abort ();
606	}	849	}
607		850
608	static coro_stack *	851	static coro_cctx *
609	stack_new ()	852	cctx_new ()
610	{	853	{
611	coro_stack *stack;	854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
612		857
		858	++cctx_count;
		859
613	New (0, stack, 1, coro_stack);	860	Newz (0, cctx, 1, coro_cctx);
614		861
615	#if HAVE_MMAP	862	#if HAVE_MMAP
616		863
617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
618	/* mmap suppsedly does allocate-on-write for us */	865	/* mmap supposedly does allocate-on-write for us */
619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620		867
621	if (stack->sptr == (void *)-1)	868	if (cctx->sptr != (void *)-1)
622	{
623	perror ("FATAL: unable to mmap stack for coroutine");
624	_exit (EXIT_FAILURE);
625	}	869	{
626
627	# if STACKGUARD	870	# if CORO_STACKGUARD
628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
629	# endif	872	# endif
630		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
631	#else	874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
632		875	cctx->flags |= CC_MAPPED;
633	stack->ssize = STACKSIZE * (long)sizeof (long);
634	New (0, stack->sptr, STACKSIZE, long);
635
636	if (!stack->sptr)
637	{	876	}
		877	else
		878	#endif
		879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
		882
		883	if (!cctx->sptr)
		884	{
638	perror (stderr, "FATAL: unable to malloc stack for coroutine");	885	perror ("FATAL: unable to allocate stack for coroutine");
639	_exit (EXIT_FAILURE);	886	_exit (EXIT_FAILURE);
640	}	887	}
641		888
642	#endif	889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
643		892
		893	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
645		895
646	return stack;	896	return cctx;
647	}	897	}
648		898
649	static void	899	static void
650	stack_free (coro_stack *stack)	900	cctx_destroy (coro_cctx *cctx)
651	{	901	{
652	if (!stack || stack == main_stack)	902	if (!cctx)
653	return;	903	return;
654		904
		905	--cctx_count;
		906
		907	#if CORO_USE_VALGRIND
		908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		909	#endif
		910
655	#if HAVE_MMAP	911	#if HAVE_MMAP
		912	if (cctx->flags & CC_MAPPED)
656	munmap (stack->sptr, stack->ssize);	913	munmap (cctx->sptr, cctx->ssize);
657	#else
658	Safefree (stack->sptr);
659	#endif
660
661	Safefree (stack);
662	}
663
664	static coro_stack *stack_first;
665
666	static coro_stack *
667	stack_get ()
668	{
669	coro_stack *stack;
670
671	if (stack_first)
672	{
673	stack = stack_first;
674	stack_first = stack->next;
675	}
676	else	914	else
		915	#endif
		916	Safefree (cctx->sptr);
		917
		918	Safefree (cctx);
		919	}
		920
		921	static coro_cctx *
		922	cctx_get (pTHX)
		923	{
		924	while (cctx_first)
677	{	925	{
678	stack = stack_new ();	926	coro_cctx *cctx = cctx_first;
679	PL_op = PL_op->op_next;	927	cctx_first = cctx->next;
		928	--cctx_idle;
		929
		930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		931	return cctx;
		932
		933	cctx_destroy (cctx);
680	}	934	}
681		935
682	return stack;	936	return cctx_new ();
683	}	937	}
684		938
685	static void	939	static void
686	stack_put (coro_stack *stack)	940	cctx_put (coro_cctx *cctx)
687	{	941	{
688	stack->next = stack_first;	942	/* free another cctx if overlimit */
689	stack_first = stack;	943	if (cctx_idle >= MAX_IDLE_CCTX)
690	}	944	{
		945	coro_cctx *first = cctx_first;
		946	cctx_first = first->next;
		947	--cctx_idle;
691		948
692	/* never call directly, always through the coro_state_transfer global variable */	949	cctx_destroy (first);
693	static void	950	}
		951
		952	++cctx_idle;
		953	cctx->next = cctx_first;
		954	cctx_first = cctx;
		955	}
		956
		957	/** coroutine switching *****************************************************/
		958
		959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
694	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	980	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	981	{
696	dSTACKLEVEL;	982	dSTACKLEVEL;
697		983
698	/* sometimes transfer is only called to set idle_sp */	984	/* sometimes transfer is only called to set idle_sp */
699	if (flags == TRANSFER_SET_STACKLEVEL)	985	if (!next)
		986	{
700	((coro_stack *)prev)->idle_sp = STACKLEVEL;	987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		989	}
701	else if (prev != next)	990	else if (prev != next)
702	{	991	{
703	coro_stack *prev__stack;	992	coro_cctx *prev__cctx;
		993
		994	if (prev->flags & CF_NEW)
		995	{
		996	/* create a new empty context */
		997	Newz (0, prev->cctx, 1, coro_cctx);
		998	prev->flags &= ~CF_NEW;
		999	prev->flags |= CF_RUNNING;
		1000	}
		1001
		1002	prev->flags &= ~CF_RUNNING;
		1003	next->flags |= CF_RUNNING;
704		1004
705	LOCK;	1005	LOCK;
706		1006
707	if (next->mainstack)	1007	if (next->flags & CF_NEW)
708	{	1008	{
709	/* coroutine already started */	1009	/* need to start coroutine */
710	SAVE (prev, flags);	1010	next->flags &= ~CF_NEW;
711	LOAD (next);	1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
712	}	1015	}
713	else	1016	else
714	{	1017	{
715	/* need to start coroutine */	1018	/* coroutine already started */
716	/* first get rid of the old state */	1019	save_perl (aTHX_ prev);
717	SAVE (prev, -1);	1020	load_perl (aTHX_ next);
718	/* setup coroutine call */
719	setup_coro (next);
720	/* need a stack */
721	next->stack = 0;
722	}	1021	}
723		1022
724	prev__stack = prev->stack;	1023	prev__cctx = prev->cctx;
725		1024
726	/* possibly "free" the stack */	1025	/* possibly "free" the cctx */
727	if (prev__stack->idle_sp == STACKLEVEL)	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
728	{	1027	{
729	stack_put (prev__stack);	1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1030
730	prev->stack = 0;	1031	prev->cctx = 0;
		1032
		1033	cctx_put (prev__cctx);
731	}	1034	}
732		1035
		1036	++next->usecount;
		1037
733	if (!next->stack)	1038	if (!next->cctx)
734	next->stack = stack_get ();	1039	next->cctx = cctx_get (aTHX);
735		1040
736	if (prev__stack != next->stack)	1041	if (prev__cctx != next->cctx)
737	{	1042	{
738	prev__stack->top_env = PL_top_env;	1043	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->stack->top_env;	1044	PL_top_env = next->cctx->top_env;
740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	1046	}
743		1047
744	free_coro_mortal ();	1048	free_coro_mortal (aTHX);
745
746	UNLOCK;	1049	UNLOCK;
747	}	1050	}
748	}	1051	}
749		1052
750	/* use this function pointer to call the above function */
751	/* this is done to increase chances of the compiler not inlining the call */
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755	struct transfer_args	1053	struct transfer_args
756	{	1054	{
757	struct coro *prev, *next;	1055	struct coro *prev, *next;
758	int flags;
759	};	1056	};
760		1057
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
762		1060
		1061	/** high level stuff ********************************************************/
		1062
763	static void	1063	static int
764	coro_state_destroy (struct coro *coro)	1064	coro_state_destroy (pTHX_ struct coro *coro)
765	{	1065	{
766	if (coro->refcnt--)	1066	if (coro->flags & CF_DESTROYED)
767	return;	1067	return 0;
		1068
		1069	coro->flags |= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		1081
769	if (coro->mainstack && coro->mainstack != main_mainstack)	1082	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	1083	{
771	struct coro temp;	1084	struct coro temp;
772		1085
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1086	assert (!(coro->flags & CF_RUNNING));
		1087
		1088	Zero (&temp, 1, struct coro);
		1089	temp.save = CORO_SAVE_ALL;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	1095	load_perl (aTHX_ coro);
775		1096
776	destroy_stacks (aTHX);	1097	coro_destroy_stacks (aTHX);
777		1098
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
779		1100
780	coro->mainstack = 0;	1101	coro->mainstack = 0;
781	}	1102	}
782		1103
783	stack_free (coro->stack);	1104	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
785	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;
786	}	1112	}
787		1113
788	static int	1114	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	1116	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
793		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
794	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
795		1127
796	return 0;	1128	return 0;
797	}	1129	}
798		1130
799	static int	1131	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1132	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	1133	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1134	struct coro *coro = (struct coro *)mg->mg_ptr;
803		1135
804	++coro->refcnt;	1136	++coro->refcnt;
805		1137
806	return 0;	1138	return 0;
807	}	1139	}
808		1140
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1141	static MGVTBL coro_state_vtbl = {
810		1142	0, 0, 0, 0,
811	static struct coro *	1143	coro_state_free,
812	SvSTATE (SV *coro)	1144	0,
813	{	1145	#ifdef MGf_DUP
814	HV *stash;	1146	coro_state_dup,
815	MAGIC *mg;	1147	#else
816		1148	# define MGf_DUP 0
817	if (SvROK (coro))	1149	#endif
818	coro = SvRV (coro);	1150	};
819
820	stash = SvSTASH (coro);
821	if (stash != coro_stash && stash != coro_state_stash)
822	{
823	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");
826	}
827
828	mg = SvMAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;
831	}
832		1151
833	static void	1152	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	1154	{
836	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
839	}	1158	}
840		1159
841	static void	1160	static void
842	api_transfer (SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
843	{	1162	{
844	dTHX;	1163	dTHX;
845	struct transfer_args ta;	1164	struct transfer_args ta;
846		1165
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	1167	TRANSFER (ta);
849	}	1168	}
850		1169
		1170	static int
		1171	api_save (SV *coro_sv, int new_save)
		1172	{
		1173	dTHX;
		1174	struct coro *coro = SvSTATE (coro_sv);
		1175	int old_save = coro->save;
		1176
		1177	if (new_save >= 0)
		1178	coro->save = new_save;
		1179
		1180	return old_save;
		1181	}
		1182
851	/** Coro ********************************************************************/	1183	/** Coro ********************************************************************/
852		1184
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	1185	static void
866	coro_enq (pTHX_ SV *sv)	1186	coro_enq (pTHX_ SV *coro_sv)
867	{	1187	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	1188	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	1189	}
878		1190
879	static SV *	1191	static SV *
880	coro_deq (pTHX_ int min_prio)	1192	coro_deq (pTHX_ int min_prio)
881	{	1193	{
…		…
885	if (min_prio < 0)	1197	if (min_prio < 0)
886	min_prio = 0;	1198	min_prio = 0;
887		1199
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1200	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1201	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1202	return av_shift (coro_ready [prio]);
893	}
894		1203
895	return 0;	1204	return 0;
896	}	1205	}
897		1206
		1207	static int
		1208	api_ready (SV *coro_sv)
		1209	{
		1210	dTHX;
		1211	struct coro *coro;
		1212
		1213	if (SvROK (coro_sv))
		1214	coro_sv = SvRV (coro_sv);
		1215
		1216	coro = SvSTATE (coro_sv);
		1217
		1218	if (coro->flags & CF_READY)
		1219	return 0;
		1220
		1221	coro->flags |= CF_READY;
		1222
		1223	LOCK;
		1224	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1225	++coro_nready;
		1226	UNLOCK;
		1227
		1228	return 1;
		1229	}
		1230
		1231	static int
		1232	api_is_ready (SV *coro_sv)
		1233	{
		1234	dTHX;
		1235	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1236	}
		1237
898	static void	1238	static void
899	api_ready (SV *coro)	1239	prepare_schedule (pTHX_ struct transfer_args *ta)
900	{	1240	{
901	dTHX;	1241	SV *prev_sv, *next_sv;
902		1242
903	if (SvROK (coro))	1243	for (;;)
904	coro = SvRV (coro);	1244	{
		1245	LOCK;
		1246	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1247
		1248	/* nothing to schedule: call the idle handler */
		1249	if (!next_sv)
		1250	{
		1251	dSP;
		1252	UNLOCK;
		1253
		1254	ENTER;
		1255	SAVETMPS;
		1256
		1257	PUSHMARK (SP);
		1258	PUTBACK;
		1259	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1260
		1261	FREETMPS;
		1262	LEAVE;
		1263	continue;
		1264	}
		1265
		1266	ta->next = SvSTATE (next_sv);
		1267
		1268	/* cannot transfer to destroyed coros, skip and look for next */
		1269	if (ta->next->flags & CF_DESTROYED)
		1270	{
		1271	UNLOCK;
		1272	SvREFCNT_dec (next_sv);
		1273	/* coro_nready is already taken care of by destroy */
		1274	continue;
		1275	}
		1276
		1277	--coro_nready;
		1278	UNLOCK;
		1279	break;
		1280	}
		1281
		1282	/* free this only after the transfer */
		1283	prev_sv = SvRV (coro_current);
		1284	ta->prev = SvSTATE (prev_sv);
		1285	TRANSFER_CHECK (*ta);
		1286	assert (ta->next->flags & CF_READY);
		1287	ta->next->flags &= ~CF_READY;
		1288	SvRV_set (coro_current, next_sv);
905		1289
906	LOCK;	1290	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1291	free_coro_mortal (aTHX);
		1292	coro_mortal = prev_sv;
908	UNLOCK;	1293	UNLOCK;
909	}	1294	}
910		1295
911	static void	1296	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)
913	{
914	SV *current, *prev, *next;
915
916	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
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	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();
951	coro_mortal = prev;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;
958	}
959
960	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1297	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1298	{
963	LOCK;	1299	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1300	prepare_schedule (aTHX_ ta);
		1301	}
		1302
		1303	static int
		1304	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1305	{
		1306	if (coro_nready)
		1307	{
		1308	SV *prev = SvRV (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	api_ready (prev);
		1311	return 1;
		1312	}
		1313	else
		1314	return 0;
968	}	1315	}
969		1316
970	static void	1317	static void
971	api_schedule (void)	1318	api_schedule (void)
972	{	1319	{
973	dTHX;	1320	dTHX;
974	struct transfer_args ta;	1321	struct transfer_args ta;
975		1322
976	prepare_schedule (&ta);	1323	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1324	TRANSFER (ta);
978	}	1325	}
979		1326
980	static void	1327	static int
981	api_cede (void)	1328	api_cede (void)
982	{	1329	{
983	dTHX;	1330	dTHX;
984	struct transfer_args ta;	1331	struct transfer_args ta;
985		1332
986	prepare_cede (&ta);	1333	prepare_cede (aTHX_ &ta);
		1334
		1335	if (ta.prev != ta.next)
		1336	{
987	TRANSFER (ta);	1337	TRANSFER (ta);
		1338	return 1;
		1339	}
		1340	else
		1341	return 0;
988	}	1342	}
989		1343
		1344	static int
		1345	api_cede_notself (void)
		1346	{
		1347	dTHX;
		1348	struct transfer_args ta;
		1349
		1350	if (prepare_cede_notself (aTHX_ &ta))
		1351	{
		1352	TRANSFER (ta);
		1353	return 1;
		1354	}
		1355	else
		1356	return 0;
		1357	}
		1358
		1359	static void
		1360	api_trace (struct coro *coro, int flags)
		1361	{
		1362	dTHX;
		1363
		1364	if (flags & CC_TRACE)
		1365	{
		1366	if (!coro->cctx)
		1367	coro->cctx = cctx_new ();
		1368	else if (!(coro->cctx->flags & CC_TRACE))
		1369	croak ("cannot enable tracing on coroutine with custom stack");
		1370
		1371	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1372	}
		1373	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1374	{
		1375	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1376
		1377	if (coro->flags & CF_RUNNING)
		1378	PL_runops = RUNOPS_DEFAULT;
		1379	else
		1380	coro->runops = RUNOPS_DEFAULT;
		1381	}
		1382	}
		1383
990	MODULE = Coro::State PACKAGE = Coro::State	1384	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1385
992	PROTOTYPES: DISABLE	1386	PROTOTYPES: DISABLE
993		1387
994	BOOT:	1388	BOOT:
995	{	1389	{
…		…
998	#endif	1392	#endif
999	BOOT_PAGESIZE;	1393	BOOT_PAGESIZE;
1000		1394
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1395	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1396
		1397	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1400	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1401
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1402	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1403	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1404	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1405	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1406	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1407	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1408	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1409
1007	main_mainstack = PL_mainstack;	1410	main_mainstack = PL_mainstack;
		1411	main_top_env = PL_top_env;
		1412
		1413	while (main_top_env->je_prev)
		1414	main_top_env = main_top_env->je_prev;
1008		1415
1009	coroapi.ver = CORO_API_VERSION;	1416	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1417	coroapi.transfer = api_transfer;
1011
1012	Newz (0, main_stack, 1, coro_stack);
1013	main_stack->idle_sp = (void *)-1;
1014		1418
1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1419	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016	}	1420	}
1017		1421
1018	SV *	1422	SV *
…		…
1023	HV *hv;	1427	HV *hv;
1024	int i;	1428	int i;
1025		1429
1026	Newz (0, coro, 1, struct coro);	1430	Newz (0, coro, 1, struct coro);
1027	coro->args = newAV ();	1431	coro->args = newAV ();
		1432	coro->save = CORO_SAVE_DEF;
		1433	coro->flags = CF_NEW;
1028		1434
		1435	if (coro_first) coro_first->prev = coro;
		1436	coro->next = coro_first;
		1437	coro_first = coro;
		1438
1029	hv = newHV ();	1439	coro->hv = hv = newHV ();
1030	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1440	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1441	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032		1442
1033	for (i = 1; i < items; i++)	1443	for (i = 1; i < items; i++)
1034	av_push (coro->args, newSVsv (ST (i)));	1444	av_push (coro->args, newSVsv (ST (i)));
1035
1036	coro->stack = main_stack;
1037	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1038	/*coro->stack = 0;*/
1039	}	1445	}
1040	OUTPUT:	1446	OUTPUT:
		1447	RETVAL
		1448
		1449	int
		1450	save (SV *coro, int new_save = -1)
		1451	CODE:
		1452	RETVAL = api_save (coro, new_save);
		1453	OUTPUT:
		1454	RETVAL
		1455
		1456	int
		1457	save_also (SV *coro_sv, int save_also)
		1458	CODE:
		1459	{
		1460	struct coro *coro = SvSTATE (coro_sv);
		1461	RETVAL = coro->save;
		1462	coro->save |= save_also;
		1463	}
		1464	OUTPUT:
1041	RETVAL	1465	RETVAL
1042		1466
1043	void	1467	void
1044	_set_stacklevel (...)	1468	_set_stacklevel (...)
1045	ALIAS:	1469	ALIAS:
1046	Coro::State::transfer = 1	1470	Coro::State::transfer = 1
1047	Coro::schedule = 2	1471	Coro::schedule = 2
1048	Coro::cede = 3	1472	Coro::cede = 3
1049	Coro::Cont::yield = 4	1473	Coro::cede_notself = 4
1050	CODE:	1474	CODE:
1051	{	1475	{
1052	struct transfer_args ta;	1476	struct transfer_args ta;
1053		1477
1054	switch (ix)	1478	switch (ix)
1055	{	1479	{
1056	case 0:	1480	case 0:
1057	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1481	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058	ta.next = 0;	1482	ta.next = 0;
1059	ta.flags = TRANSFER_SET_STACKLEVEL;
1060	break;	1483	break;
1061		1484
1062	case 1:	1485	case 1:
1063	if (items != 3)	1486	if (items != 2)
1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1487	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065		1488
1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1489	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1067	break;	1490	break;
1068		1491
1069	case 2:	1492	case 2:
1070	prepare_schedule (&ta);	1493	prepare_schedule (aTHX_ &ta);
1071	break;	1494	break;
1072		1495
1073	case 3:	1496	case 3:
1074	prepare_cede (&ta);	1497	prepare_cede (aTHX_ &ta);
1075	break;	1498	break;
1076		1499
1077	case 4:	1500	case 4:
1078	{	1501	if (!prepare_cede_notself (aTHX_ &ta))
1079	SV *yieldstack;	1502	XSRETURN_EMPTY;
1080	SV *sv;
1081	AV *defav = GvAV (PL_defgv);
1082		1503
1083	yieldstack = *hv_fetch (
1084	(HV *)SvRV (GvSV (coro_current)),
1085	"yieldstack", sizeof ("yieldstack") - 1,
1086	0
1087	);
1088
1089	/* set up @_ -- ugly */
1090	av_clear (defav);
1091	av_fill (defav, items - 1);
1092	while (items--)
1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095	sv = av_pop ((AV *)SvRV (yieldstack));
1096	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098	ta.flags = 0;
1099	SvREFCNT_dec (sv);
1100	}
1101	break;	1504	break;
1102
1103	}	1505	}
1104		1506
		1507	BARRIER;
1105	TRANSFER (ta);	1508	TRANSFER (ta);
1106	}
1107		1509
1108	void	1510	if (GIMME_V != G_VOID && ta.next != ta.prev)
1109	_clone_state_from (SV *dst, SV *src)	1511	XSRETURN_YES;
		1512	}
		1513
		1514	bool
		1515	_destroy (SV *coro_sv)
1110	CODE:	1516	CODE:
1111	{	1517	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1112	struct coro *coro_src = SvSTATE (src);	1518	OUTPUT:
1113		1519	RETVAL
1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116	++coro_src->refcnt;
1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118	}
1119
1120	void
1121	_nonlocal_goto (IV nextop)
1122	CODE:
1123	/* uuh, somebody will kill me again for this */
1124	PL_op->op_next = INT2PTR (OP *, nextop);
1125		1520
1126	void	1521	void
1127	_exit (code)	1522	_exit (code)
1128	int code	1523	int code
1129	PROTOTYPE: $	1524	PROTOTYPE: $
1130	CODE:	1525	CODE:
1131	_exit (code);	1526	_exit (code);
1132		1527
		1528	int
		1529	cctx_stacksize (int new_stacksize = 0)
		1530	CODE:
		1531	RETVAL = coro_stacksize;
		1532	if (new_stacksize)
		1533	coro_stacksize = new_stacksize;
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
		1538	cctx_count ()
		1539	CODE:
		1540	RETVAL = cctx_count;
		1541	OUTPUT:
		1542	RETVAL
		1543
		1544	int
		1545	cctx_idle ()
		1546	CODE:
		1547	RETVAL = cctx_idle;
		1548	OUTPUT:
		1549	RETVAL
		1550
		1551	void
		1552	list ()
		1553	PPCODE:
		1554	{
		1555	struct coro *coro;
		1556	for (coro = coro_first; coro; coro = coro->next)
		1557	if (coro->hv)
		1558	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1559	}
		1560
		1561	void
		1562	call (Coro::State coro, SV *coderef)
		1563	ALIAS:
		1564	eval = 1
		1565	CODE:
		1566	{
		1567	if (coro->mainstack)
		1568	{
		1569	struct coro temp;
		1570	Zero (&temp, 1, struct coro);
		1571	temp.save = CORO_SAVE_ALL;
		1572
		1573	if (!(coro->flags & CF_RUNNING))
		1574	{
		1575	save_perl (aTHX_ &temp);
		1576	load_perl (aTHX_ coro);
		1577	}
		1578
		1579	{
		1580	dSP;
		1581	ENTER;
		1582	SAVETMPS;
		1583	PUSHMARK (SP);
		1584	PUTBACK;
		1585	if (ix)
		1586	eval_sv (coderef, 0);
		1587	else
		1588	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1589	SPAGAIN;
		1590	FREETMPS;
		1591	LEAVE;
		1592	PUTBACK;
		1593	}
		1594
		1595	if (!(coro->flags & CF_RUNNING))
		1596	{
		1597	save_perl (aTHX_ coro);
		1598	load_perl (aTHX_ &temp);
		1599	}
		1600	}
		1601	}
		1602
		1603	SV *
		1604	is_ready (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	is_ready = CF_READY
		1608	is_running = CF_RUNNING
		1609	is_new = CF_NEW
		1610	is_destroyed = CF_DESTROYED
		1611	CODE:
		1612	RETVAL = boolSV (coro->flags & ix);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	void
		1617	api_trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1618
		1619	SV *
		1620	has_stack (Coro::State coro)
		1621	PROTOTYPE: $
		1622	CODE:
		1623	RETVAL = boolSV (!!coro->cctx);
		1624	OUTPUT:
		1625	RETVAL
		1626
		1627	int
		1628	is_traced (Coro::State coro)
		1629	PROTOTYPE: $
		1630	CODE:
		1631	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1632	OUTPUT:
		1633	RETVAL
		1634
		1635	IV
		1636	rss (Coro::State coro)
		1637	PROTOTYPE: $
		1638	ALIAS:
		1639	usecount = 1
		1640	CODE:
		1641	switch (ix)
		1642	{
		1643	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1644	case 1: RETVAL = coro->usecount; break;
		1645	}
		1646	OUTPUT:
		1647	RETVAL
		1648
		1649
1133	MODULE = Coro::State PACKAGE = Coro	1650	MODULE = Coro::State PACKAGE = Coro
1134		1651
1135	BOOT:	1652	BOOT:
1136	{	1653	{
1137	int i;	1654	int i;
		1655
		1656	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1657	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1658	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1659
		1660	coro_current = get_sv ("Coro::current", FALSE);
		1661	SvREADONLY_on (coro_current);
1138		1662
1139	coro_stash = gv_stashpv ("Coro", TRUE);	1663	coro_stash = gv_stashpv ("Coro", TRUE);
1140		1664
1141	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1665	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1142	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1666	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1667	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1668	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1669	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1670	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147		1671
1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1672	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152	coro_ready[i] = newAV ();	1673	coro_ready[i] = newAV ();
1153		1674
1154	{	1675	{
1155	SV *sv = perl_get_sv("Coro::API", 1);	1676	SV *sv = perl_get_sv("Coro::API", 1);
1156		1677
1157	coroapi.schedule = api_schedule;	1678	coroapi.schedule = api_schedule;
		1679	coroapi.save = api_save;
1158	coroapi.cede = api_cede;	1680	coroapi.cede = api_cede;
		1681	coroapi.cede_notself = api_cede_notself;
1159	coroapi.ready = api_ready;	1682	coroapi.ready = api_ready;
		1683	coroapi.is_ready = api_is_ready;
1160	coroapi.nready = &coro_nready;	1684	coroapi.nready = &coro_nready;
1161	coroapi.current = coro_current;	1685	coroapi.current = coro_current;
1162		1686
1163	GCoroAPI = &coroapi;	1687	GCoroAPI = &coroapi;
1164	sv_setiv (sv, (IV)&coroapi);	1688	sv_setiv (sv, (IV)&coroapi);
1165	SvREADONLY_on (sv);	1689	SvREADONLY_on (sv);
1166	}	1690	}
1167	}	1691	}
		1692
		1693	void
		1694	_set_current (SV *current)
		1695	PROTOTYPE: $
		1696	CODE:
		1697	SvREFCNT_dec (SvRV (coro_current));
		1698	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168		1699
1169	int	1700	int
1170	prio (Coro::State coro, int newprio = 0)	1701	prio (Coro::State coro, int newprio = 0)
1171	ALIAS:	1702	ALIAS:
1172	nice = 1	1703	nice = 1
…		…
1175	RETVAL = coro->prio;	1706	RETVAL = coro->prio;
1176		1707
1177	if (items > 1)	1708	if (items > 1)
1178	{	1709	{
1179	if (ix)	1710	if (ix)
1180	newprio += coro->prio;	1711	newprio = coro->prio - newprio;
1181		1712
1182	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1713	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1714	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184		1715
1185	coro->prio = newprio;	1716	coro->prio = newprio;
1186	}	1717	}
1187	}	1718	}
		1719	OUTPUT:
		1720	RETVAL
1188		1721
1189	void	1722	SV *
1190	ready (SV *self)	1723	ready (SV *self)
1191	PROTOTYPE: $	1724	PROTOTYPE: $
1192	CODE:	1725	CODE:
1193	api_ready (self);	1726	RETVAL = boolSV (api_ready (self));
		1727	OUTPUT:
		1728	RETVAL
1194		1729
1195	int	1730	int
1196	nready (...)	1731	nready (...)
1197	PROTOTYPE:	1732	PROTOTYPE:
1198	CODE:	1733	CODE:
1199	RETVAL = coro_nready;	1734	RETVAL = coro_nready;
1200	OUTPUT:	1735	OUTPUT:
1201	RETVAL	1736	RETVAL
1202		1737
		1738	# for async_pool speedup
		1739	void
		1740	_pool_1 (SV *cb)
		1741	CODE:
		1742	{
		1743	int i, len;
		1744	HV *hv = (HV *)SvRV (coro_current);
		1745	AV *defav = GvAV (PL_defgv);
		1746	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1747	AV *invoke_av;
		1748
		1749	if (!invoke)
		1750	croak ("\3terminate\2\n");
		1751
		1752	hv_store (hv, "desc", sizeof ("desc") - 1,
		1753	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1754
		1755	invoke_av = (AV *)SvRV (invoke);
		1756	len = av_len (invoke_av);
		1757
		1758	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1759
		1760	if (len > 0)
		1761	{
		1762	av_fill (defav, len - 1);
		1763	for (i = 0; i < len; ++i)
		1764	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1765	}
		1766
		1767	SvREFCNT_dec (invoke);
		1768	}
		1769
		1770	void
		1771	_pool_2 (SV *cb)
		1772	CODE:
		1773	{
		1774	struct coro *coro = SvSTATE (coro_current);
		1775
		1776	sv_setsv (cb, &PL_sv_undef);
		1777
		1778	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1779	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1780	croak ("\3terminate\2\n");
		1781
		1782	av_clear (GvAV (PL_defgv));
		1783	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1784	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1785	coro->save = CORO_SAVE_DEF;
		1786	coro->prio = 0;
		1787
		1788	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1789	api_trace (coro, 0);
		1790
		1791	av_push (av_async_pool, newSVsv (coro_current));
		1792	}
		1793
		1794
1203	MODULE = Coro::State PACKAGE = Coro::AIO	1795	MODULE = Coro::State PACKAGE = Coro::AIO
1204		1796
1205	SV *	1797	SV *
1206	_get_state ()	1798	_get_state ()
1207	CODE:	1799	CODE:
1208	{	1800	{
1209	struct {	1801	struct io_state *data;
1210	int errorno;
1211	int laststype;
1212	int laststatval;
1213	Stat_t statcache;
1214	} data;
1215		1802
		1803	RETVAL = newSV (sizeof (struct io_state));
		1804	data = (struct io_state *)SvPVX (RETVAL);
		1805	SvCUR_set (RETVAL, sizeof (struct io_state));
		1806	SvPOK_only (RETVAL);
		1807
1216	data.errorno = errno;	1808	data->errorno = errno;
1217	data.laststype = PL_laststype;	1809	data->laststype = PL_laststype;
1218	data.laststatval = PL_laststatval;	1810	data->laststatval = PL_laststatval;
1219	data.statcache = PL_statcache;	1811	data->statcache = PL_statcache;
1220
1221	RETVAL = newSVpvn ((char *)&data, sizeof data);
1222	}	1812	}
1223	OUTPUT:	1813	OUTPUT:
1224	RETVAL	1814	RETVAL
1225		1815
1226	void	1816	void
1227	_set_state (char *data_)	1817	_set_state (char *data_)
1228	PROTOTYPE: $	1818	PROTOTYPE: $
1229	CODE:	1819	CODE:
1230	{	1820	{
1231	struct {	1821	struct io_state *data = (void *)data_;
1232	int errorno;
1233	int laststype;
1234	int laststatval;
1235	Stat_t statcache;
1236	} *data = (void *)data_;
1237		1822
1238	errno = data->errorno;	1823	errno = data->errorno;
1239	PL_laststype = data->laststype;	1824	PL_laststype = data->laststype;
1240	PL_laststatval = data->laststatval;	1825	PL_laststatval = data->laststatval;
1241	PL_statcache = data->statcache;	1826	PL_statcache = data->statcache;
1242	}	1827	}
		1828

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