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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 1.181 by root, Wed Oct 3 17:37:33 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
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
		155
87	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	157	typedef struct coro_cctx {
89	struct coro_stack *next;	158	struct coro_cctx *next;
90		159
91	/* the stack */	160	/* the stack */
92	void *sptr;	161	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
94		163
95	/* cpu state */	164	/* cpu state */
96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
97	JMPENV *top_env;	167	JMPENV *top_env;
98	coro_context cctx;	168	coro_context cctx;
99	} coro_stack;	169
		170	#if CORO_USE_VALGRIND
		171	int valgrind_id;
		172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
100		182
101	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
102	struct coro {	184	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	186	coro_cctx *cctx;
105		187
106	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
107	AV *args;	189	AV *args;
108	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
109		192
110	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
111	AV *defav;	194	AV *defav; /* @_ */
112	SV *defsv;	195	SV *defsv; /* $_ */
113	SV *errsv;	196	SV *errsv; /* $@ */
		197	GV *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
114		200
115	/* saved global state not related to stacks */	201	#define VAR(name,type) type name;
116	U8 dowarn;	202	# include "state.h"
117	I32 in_eval;	203	#undef VAR
118		204
119	/* the stacks and related info (callchain etc..) */	205	/* statistics */
120	PERL_SI *curstackinfo;	206	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		207
149	/* coro process data */	208	/* coro process data */
150	int prio;	209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	GV *defoutgv;
		214
		215	/* linked list */
		216	struct coro *next, *prev;
		217	HV *hv; /* the perl hash associated with this coro, if any */
151	};	218	};
152		219
153	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
154	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
155		222
		223	/** Coro ********************************************************************/
		224
		225	#define PRIO_MAX 3
		226	#define PRIO_HIGH 1
		227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/** lowlevel stuff **********************************************************/
		239
156	static AV *	240	static AV *
157	coro_clone_padlist (CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
158	{	242	{
159	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
160	AV *newpadlist, *newpad;	244	AV *newpadlist, *newpad;
161		245
162	newpadlist = newAV ();	246	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	248	#if PERL_VERSION_ATLEAST (5,9,0)
		249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		250	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	252	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	254	--AvFILLp (padlist);
171		255
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	256	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
174		258
175	return newpadlist;	259	return newpadlist;
176	}	260	}
177		261
178	static void	262	static void
179	free_padlist (AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
180	{	264	{
181	/* may be during global destruction */	265	/* may be during global destruction */
182	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
183	{	267	{
184	I32 i = AvFILLp (padlist);	268	I32 i = AvFILLp (padlist);
…		…
205	AV *padlist;	289	AV *padlist;
206	AV *av = (AV *)mg->mg_obj;	290	AV *av = (AV *)mg->mg_obj;
207		291
208	/* casting is fun. */	292	/* casting is fun. */
209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210	free_padlist (padlist);	294	free_padlist (aTHX_ padlist);
211		295
212	SvREFCNT_dec (av);	296	SvREFCNT_dec (av);
213		297
214	return 0;	298	return 0;
215	}	299	}
216		300
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		302
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		304
		305	#define CORO_MAGIC(cv) \
		306	SvMAGIC (cv) \
		307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		308	? SvMAGIC (cv) \
		309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		310	: 0
		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
221	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
222	static void	339	static void
223	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
224	{	341	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
226		344
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	347	else
230	{	348	{
231	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	350	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	351	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
237	#else	355	#else
238	CvPADLIST (cv) = coro_clone_padlist (cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239	#endif	357	#endif
240	}	358	}
241	}	359	}
242		360
243	static void	361	static void
244	put_padlist (CV *cv)	362	put_padlist (pTHX_ CV *cv)
245	{	363	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
247		366
248	if (!mg)	367	if (!mg)
249	{	368	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
254	}	373	}
255		374
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
257	}
258		376
259	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
260	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
261		379
262	#define LOAD(state) load_state((state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	#define SAVE(state,flags) save_state((state),(flags));	381	}
264		382
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/** load & save, init *******************************************************/
266		384
267	static void	385	static void
268	load_state(Coro__State c)	386	load_perl (pTHX_ Coro__State c)
269	{	387	{
270	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
272		391
273	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
274	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
275	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
276	PL_stack_sp = c->stack_sp;	395	PL_defoutgv = c->deffh;
277	PL_op = c->op;	396	PL_rs = c->irssv;
278	PL_curpad = c->curpad;	397	GvSV (irsgv) = c->irssv_sv;
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		398
308	{	399	{
309	dSP;	400	dSP;
310	CV *cv;	401	CV *cv;
311		402
312	/* now do the ugly restore mess */	403	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	404	while ((cv = (CV *)POPs))
314	{	405	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	406	put_padlist (aTHX_ cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	407	CvDEPTH (cv) = PTR2IV (POPs);
321	}	408	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	409	}
325		410
326	PUTBACK;	411	PUTBACK;
327	}	412	}
328	}	413	}
329		414
330	static void	415	static void
331	save_state(Coro__State c, int flags)	416	save_perl (pTHX_ Coro__State c)
332	{	417	{
333	{	418	{
334	dSP;	419	dSP;
335	I32 cxix = cxstack_ix;	420	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	421	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	424	/*
340	* the worst thing you can imagine happens first - we have to save	425	* the worst thing you can imagine happens first - we have to save
341	* (and reinitialize) all cv's in the whole callchain :(	426	* (and reinitialize) all cv's in the whole callchain :(
342	*/	427	*/
343		428
344	PUSHs (Nullsv);	429	XPUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	430	/* this loop was inspired by pp_caller */
346	for (;;)	431	for (;;)
347	{	432	{
348	while (cxix >= 0)	433	while (cxix >= 0)
349	{	434	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	435	PERL_CONTEXT *cx = &ccstk[cxix--];
351		436
352	if (CxTYPE(cx) == CXt_SUB)	437	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
353	{	438	{
354	CV *cv = cx->blk_sub.cv;	439	CV *cv = cx->blk_sub.cv;
		440
355	if (CvDEPTH(cv))	441	if (CvDEPTH (cv))
356	{	442	{
357	EXTEND (SP, CvDEPTH(cv)*2);	443	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));	444	PUSHs ((SV *)CvPADLIST (cv));
		445	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	446	PUSHs ((SV *)cv);
368		447
		448	CvDEPTH (cv) = 0;
369	get_padlist (cv);	449	get_padlist (aTHX_ cv);
370	}	450	}
371	}	451	}
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	}	452	}
381		453
382	if (top_si->si_type == PERLSI_MAIN)	454	if (top_si->si_type == PERLSI_MAIN)
383	break;	455	break;
384		456
385	top_si = top_si->si_prev;	457	top_si = top_si->si_prev;
386	ccstk = top_si->si_cxstack;	458	ccstk = top_si->si_cxstack;
387	cxix = top_si->si_cxix;	459	cxix = top_si->si_cxix;
388	}	460	}
389		461
390	PUTBACK;	462	PUTBACK;
391	}	463	}
392		464
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	465	c->defav = GvAV (PL_defgv);
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	466	c->defsv = DEFSV;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	467	c->errsv = ERRSV;
		468	c->deffh = PL_defoutgv;
		469	c->irssv = PL_rs;
		470	c->irssv_sv = GvSV (irsgv);
396		471
397	c->dowarn = PL_dowarn;	472	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	473	# include "state.h"
399		474	#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	}	475	}
431		476
432	/*	477	/*
433	* allocate various perl stacks. This is an exact copy	478	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	479	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	480	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	481	* not usually need a lot of stackspace.
437	*/	482	*/
		483	#if CORO_PREFER_PERL_FUNCTIONS
		484	# define coro_init_stacks init_stacks
		485	#else
438	static void	486	static void
439	coro_init_stacks ()	487	coro_init_stacks (pTHX)
440	{	488	{
441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	489	PL_curstackinfo = new_stackinfo(64, 6);
442	PL_curstackinfo->si_type = PERLSI_MAIN;	490	PL_curstackinfo->si_type = PERLSI_MAIN;
443	PL_curstack = PL_curstackinfo->si_stack;	491	PL_curstack = PL_curstackinfo->si_stack;
444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445		493
446	PL_stack_base = AvARRAY(PL_curstack);	494	PL_stack_base = AvARRAY(PL_curstack);
447	PL_stack_sp = PL_stack_base;	495	PL_stack_sp = PL_stack_base;
448	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449		497
450	New(50,PL_tmps_stack,96,SV*);	498	New(50,PL_tmps_stack,64,SV*);
451	PL_tmps_floor = -1;	499	PL_tmps_floor = -1;
452	PL_tmps_ix = -1;	500	PL_tmps_ix = -1;
453	PL_tmps_max = 96;	501	PL_tmps_max = 64;
454		502
455	New(54,PL_markstack,16,I32);	503	New(54,PL_markstack,16,I32);
456	PL_markstack_ptr = PL_markstack;	504	PL_markstack_ptr = PL_markstack;
457	PL_markstack_max = PL_markstack + 16;	505	PL_markstack_max = PL_markstack + 16;
458		506
…		…
462		510
463	New(54,PL_scopestack,16,I32);	511	New(54,PL_scopestack,16,I32);
464	PL_scopestack_ix = 0;	512	PL_scopestack_ix = 0;
465	PL_scopestack_max = 16;	513	PL_scopestack_max = 16;
466		514
467	New(54,PL_savestack,96,ANY);	515	New(54,PL_savestack,64,ANY);
468	PL_savestack_ix = 0;	516	PL_savestack_ix = 0;
469	PL_savestack_max = 96;	517	PL_savestack_max = 64;
470		518
471	#if PERL_VERSION < 9	519	#if !PERL_VERSION_ATLEAST (5,9,0)
472	New(54,PL_retstack,8,OP*);	520	New(54,PL_retstack,4,OP*);
473	PL_retstack_ix = 0;	521	PL_retstack_ix = 0;
474	PL_retstack_max = 8;	522	PL_retstack_max = 4;
475	#endif	523	#endif
476	}	524	}
		525	#endif
477		526
478	/*	527	/*
479	* destroy the stacks, the callchain etc...	528	* destroy the stacks, the callchain etc...
480	*/	529	*/
481	static void	530	static void
482	destroy_stacks()	531	coro_destroy_stacks (pTHX)
483	{	532	{
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)	533	while (PL_curstackinfo->si_next)
496	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
497		535
498	while (PL_curstackinfo)	536	while (PL_curstackinfo)
499	{	537	{
500	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
501		539
502	{ /*D*//*remove*/
503	dSP;
504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505	PUTBACK; /* possibly superfluous */
506	}
507
508	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
509	{
510	dounwind (-1);/*D*//*remove*/
511	SvREFCNT_dec (PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
512	}
513		542
514	Safefree (PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
515	Safefree (PL_curstackinfo);	544	Safefree (PL_curstackinfo);
516	PL_curstackinfo = p;	545	PL_curstackinfo = p;
517	}	546	}
518		547
519	Safefree (PL_tmps_stack);	548	Safefree (PL_tmps_stack);
520	Safefree (PL_markstack);	549	Safefree (PL_markstack);
521	Safefree (PL_scopestack);	550	Safefree (PL_scopestack);
522	Safefree (PL_savestack);	551	Safefree (PL_savestack);
523	#if PERL_VERSION < 9	552	#if !PERL_VERSION_ATLEAST (5,9,0)
524	Safefree (PL_retstack);	553	Safefree (PL_retstack);
525	#endif	554	#endif
526	}	555	}
527		556
528	static void	557	static size_t
529	setup_coro (struct coro *coro)	558	coro_rss (pTHX_ struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
		565	{
		566	#define VAR(name,type)coro->name = PL_ ## name;
		567	# include "state.h"
		568	#undef VAR
		569	}
		570
		571	rss += sizeof (coro->curstackinfo);
		572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
		579
		580	#if !PERL_VERSION_ATLEAST (5,9,0)
		581	rss += coro->retstack_max * sizeof (OP *);
		582	#endif
		583	}
		584
		585	return rss;
		586	}
		587
		588	/** coroutine stack handling ************************************************/
		589
		590	static void
		591	coro_setup (pTHX_ struct coro *coro)
530	{	592	{
531	/*	593	/*
532	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
533	*/	595	*/
534	dTHX;	596	coro_init_stacks (aTHX);
		597
		598	PL_runops = RUNOPS_DEFAULT;
		599	PL_curcop = &PL_compiling;
		600	PL_in_eval = EVAL_NULL;
		601	PL_comppad = 0;
		602	PL_curpm = 0;
		603	PL_localizing = 0;
		604	PL_dirty = 0;
		605	PL_restartop = 0;
		606
		607	GvSV (PL_defgv) = NEWSV (0, 0);
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609	GvSV (PL_errgv) = NEWSV (0, 0);
		610	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		611	PL_rs = newSVsv (GvSV (irsgv));
		612
		613	{
		614	IO *io = newIO ();
		615	PL_defoutgv = newGVgen ("Coro");
		616	GvIOp(PL_defoutgv) = io;
		617	IoTYPE (io) = IoTYPE_WRONLY;
		618	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		619	IoFLAGS (io) |= IOf_FLUSH;
		620	}
		621
		622	{
		623	dSP;
		624	LOGOP myop;
		625
		626	Zero (&myop, 1, LOGOP);
		627	myop.op_next = Nullop;
		628	myop.op_flags = OPf_WANT_VOID;
		629
		630	PUSHMARK (SP);
		631	XPUSHs (av_shift (GvAV (PL_defgv)));
		632	PUTBACK;
		633	PL_op = (OP *)&myop;
		634	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		635	SPAGAIN;
		636	}
		637
		638	ENTER; /* necessary e.g. for dounwind */
		639	}
		640
		641	static void
		642	coro_destroy (pTHX_ struct coro *coro)
		643	{
		644	if (!IN_DESTRUCT)
		645	{
		646	/* restore all saved variables and stuff */
		647	LEAVE_SCOPE (0);
		648	assert (PL_tmps_floor == -1);
		649
		650	/* free all temporaries */
		651	FREETMPS;
		652	assert (PL_tmps_ix == -1);
		653
		654	/* unwind all extra stacks */
		655	POPSTACK_TO (PL_mainstack);
		656
		657	/* unwind main stack */
		658	dounwind (-1);
		659	}
		660
		661	SvREFCNT_dec (GvSV (PL_defgv));
		662	SvREFCNT_dec (GvAV (PL_defgv));
		663	SvREFCNT_dec (GvSV (PL_errgv));
		664	SvREFCNT_dec (PL_defoutgv);
		665	SvREFCNT_dec (PL_rs);
		666	SvREFCNT_dec (GvSV (irsgv));
		667
		668	SvREFCNT_dec (coro->defoutgv);
		669	//SvREFCNT_dec (coro->throw);
		670
		671	coro_destroy_stacks (aTHX);
		672	}
		673
		674	static void
		675	free_coro_mortal (pTHX)
		676	{
		677	if (coro_mortal)
		678	{
		679	SvREFCNT_dec (coro_mortal);
		680	coro_mortal = 0;
		681	}
		682	}
		683
		684	static int
		685	runops_trace (pTHX)
		686	{
		687	COP *oldcop = 0;
		688	int oldcxix = -2;
		689	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		690	coro_cctx *cctx = coro->cctx;
		691
		692	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		693	{
		694	PERL_ASYNC_CHECK ();
		695
		696	if (cctx->flags & CC_TRACE_ALL)
		697	{
		698	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		699	{
		700	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		701	SV **bot, **top;
		702	AV *av = newAV (); /* return values */
		703	SV **cb;
		704	dSP;
		705
		706	GV *gv = CvGV (cx->blk_sub.cv);
		707	SV *fullname = sv_2mortal (newSV (0));
		708	if (isGV (gv))
		709	gv_efullname3 (fullname, gv, 0);
		710
		711	bot = PL_stack_base + cx->blk_oldsp + 1;
		712	top = cx->blk_gimme == G_ARRAY ? SP + 1
		713	: cx->blk_gimme == G_SCALAR ? bot + 1
		714	: bot;
		715
		716	while (bot < top)
		717	av_push (av, SvREFCNT_inc (*bot++));
		718
		719	PL_runops = RUNOPS_DEFAULT;
		720	ENTER;
		721	SAVETMPS;
		722	EXTEND (SP, 3);
		723	PUSHMARK (SP);
		724	PUSHs (&PL_sv_no);
		725	PUSHs (fullname);
		726	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		727	PUTBACK;
		728	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		729	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		730	SPAGAIN;
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = runops_trace;
		734	}
		735
		736	if (oldcop != PL_curcop)
		737	{
		738	oldcop = PL_curcop;
		739
		740	if (PL_curcop != &PL_compiling)
		741	{
		742	SV **cb;
		743
		744	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		745	{
		746	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		747
		748	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		749	{
		750	runops_proc_t old_runops = PL_runops;
		751	dSP;
		752	GV *gv = CvGV (cx->blk_sub.cv);
		753	SV *fullname = sv_2mortal (newSV (0));
		754
		755	if (isGV (gv))
		756	gv_efullname3 (fullname, gv, 0);
		757
		758	PL_runops = RUNOPS_DEFAULT;
		759	ENTER;
		760	SAVETMPS;
		761	EXTEND (SP, 3);
		762	PUSHMARK (SP);
		763	PUSHs (&PL_sv_yes);
		764	PUSHs (fullname);
		765	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		766	PUTBACK;
		767	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		768	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		769	SPAGAIN;
		770	FREETMPS;
		771	LEAVE;
		772	PL_runops = runops_trace;
		773	}
		774
		775	oldcxix = cxstack_ix;
		776	}
		777
		778	if (cctx->flags & CC_TRACE_LINE)
		779	{
		780	dSP;
		781
		782	PL_runops = RUNOPS_DEFAULT;
		783	ENTER;
		784	SAVETMPS;
		785	EXTEND (SP, 3);
		786	PL_runops = RUNOPS_DEFAULT;
		787	PUSHMARK (SP);
		788	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		789	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		790	PUTBACK;
		791	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		792	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		793	SPAGAIN;
		794	FREETMPS;
		795	LEAVE;
		796	PL_runops = runops_trace;
		797	}
		798	}
		799	}
		800	}
		801	}
		802
		803	TAINT_NOT;
		804	return 0;
		805	}
		806
		807	/* inject a fake call to Coro::State::_cctx_init into the execution */
		808	/* _cctx_init should be careful, as it could be called at almost any time */
		809	/* during execution of a perl program */
		810	static void NOINLINE
		811	prepare_cctx (pTHX_ coro_cctx *cctx)
		812	{
535	dSP;	813	dSP;
536	UNOP myop;	814	LOGOP myop;
537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538		815
539	coro_init_stacks ();	816	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		817
545	SPAGAIN;	818	if (cctx->flags & CC_TRACE)
		819	PL_runops = runops_trace;
546		820
547	Zero (&myop, 1, UNOP);	821	Zero (&myop, 1, LOGOP);
548	myop.op_next = Nullop;	822	myop.op_next = PL_op;
549	myop.op_flags = OPf_WANT_VOID;	823	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550		824
		825	PUSHMARK (SP);
		826	EXTEND (SP, 2);
		827	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		828	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		829	PUTBACK;
551	PL_op = (OP *)&myop;	830	PL_op = (OP *)&myop;
552
553	PUSHMARK(SP);
554	XPUSHs (sub_init);
555	PUTBACK;
556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	831	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557	SPAGAIN;	832	SPAGAIN;
558
559	ENTER; /* necessary e.g. for dounwind */
560	}	833	}
561		834
562	static void	835	/*
563	free_coro_mortal ()	836	* this is a _very_ stripped down perl interpreter ;)
564	{	837	*/
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	838	static void
592	coro_run (void *arg)	839	coro_run (void *arg)
593	{	840	{
		841	dTHX;
		842
		843	/* coro_run is the alternative tail of transfer(), so unlock here. */
		844	UNLOCK;
		845
		846	/* we now skip the entersub that lead to transfer() */
		847	PL_op = PL_op->op_next;
		848
		849	/* inject a fake subroutine call to cctx_init */
		850	prepare_cctx (aTHX_ (coro_cctx *)arg);
		851
		852	/* somebody or something will hit me for both perl_run and PL_restartop */
		853	PL_restartop = PL_op;
		854	perl_run (PL_curinterp);
		855
594	/*	856	/*
595	* this is a _very_ stripped down perl interpreter ;)	857	* If perl-run returns we assume exit() was being called or the coro
		858	* fell off the end, which seems to be the only valid (non-bug)
		859	* reason for perl_run to return. We try to exit by jumping to the
		860	* bootstrap-time "top" top_env, as we cannot restore the "main"
		861	* coroutine as Coro has no such concept
596	*/	862	*/
597	UNLOCK;
598
599	PL_top_env = &PL_start_env;	863	PL_top_env = main_top_env;
600	prepare_cctx ((coro_stack *)arg);	864	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	}	865	}
608		866
609	static coro_stack *	867	static coro_cctx *
610	stack_new ()	868	cctx_new ()
611	{	869	{
612	coro_stack *stack;	870	coro_cctx *cctx;
		871	void *stack_start;
		872	size_t stack_size;
613		873
		874	++cctx_count;
		875
614	New (0, stack, 1, coro_stack);	876	Newz (0, cctx, 1, coro_cctx);
615		877
616	#if HAVE_MMAP	878	#if HAVE_MMAP
617		879
618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	880	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
619	/* mmap suppsedly does allocate-on-write for us */	881	/* 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);	882	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621		883
622	if (stack->sptr == (void *)-1)	884	if (cctx->sptr != (void *)-1)
623	{
624	perror ("FATAL: unable to mmap stack for coroutine");
625	_exit (EXIT_FAILURE);
626	}	885	{
627
628	# if STACKGUARD	886	# if CORO_STACKGUARD
629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	887	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
630	# endif	888	# endif
631		889	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
632	#else	890	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
633		891	cctx->flags |= CC_MAPPED;
634	stack->ssize = STACKSIZE * (long)sizeof (long);
635	New (0, stack->sptr, STACKSIZE, long);
636
637	if (!stack->sptr)
638	{	892	}
		893	else
		894	#endif
		895	{
		896	cctx->ssize = coro_stacksize * (long)sizeof (long);
		897	New (0, cctx->sptr, coro_stacksize, long);
		898
		899	if (!cctx->sptr)
		900	{
639	perror (stderr, "FATAL: unable to malloc stack for coroutine");	901	perror ("FATAL: unable to allocate stack for coroutine");
640	_exit (EXIT_FAILURE);	902	_exit (EXIT_FAILURE);
641	}	903	}
642		904
643	#endif	905	stack_start = cctx->sptr;
		906	stack_size = cctx->ssize;
		907	}
644		908
		909	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	910	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
646		911
647	return stack;	912	return cctx;
648	}	913	}
649		914
650	static void	915	static void
651	stack_free (coro_stack *stack)	916	cctx_destroy (coro_cctx *cctx)
652	{	917	{
653	if (!stack)	918	if (!cctx)
654	return;	919	return;
655		920
		921	--cctx_count;
		922
		923	#if CORO_USE_VALGRIND
		924	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		925	#endif
		926
656	#if HAVE_MMAP	927	#if HAVE_MMAP
		928	if (cctx->flags & CC_MAPPED)
657	munmap (stack->sptr, stack->ssize);	929	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	930	else
		931	#endif
		932	Safefree (cctx->sptr);
		933
		934	Safefree (cctx);
		935	}
		936
		937	static coro_cctx *
		938	cctx_get (pTHX)
		939	{
		940	while (cctx_first)
678	{	941	{
679	stack = stack_new ();	942	coro_cctx *cctx = cctx_first;
680	PL_op = PL_op->op_next;	943	cctx_first = cctx->next;
		944	--cctx_idle;
		945
		946	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		947	return cctx;
		948
		949	cctx_destroy (cctx);
681	}	950	}
682		951
683	return stack;	952	return cctx_new ();
684	}	953	}
685		954
686	static void	955	static void
687	stack_put (coro_stack *stack)	956	cctx_put (coro_cctx *cctx)
688	{	957	{
689	stack->next = stack_first;	958	/* free another cctx if overlimit */
690	stack_first = stack;	959	if (cctx_idle >= MAX_IDLE_CCTX)
691	}	960	{
		961	coro_cctx *first = cctx_first;
		962	cctx_first = first->next;
		963	--cctx_idle;
692		964
693	/* never call directly, always through the coro_state_transfer global variable */	965	cctx_destroy (first);
694	static void	966	}
		967
		968	++cctx_idle;
		969	cctx->next = cctx_first;
		970	cctx_first = cctx;
		971	}
		972
		973	/** coroutine switching *****************************************************/
		974
		975	static void NOINLINE
		976	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		977	{
		978	if (prev != next)
		979	{
		980	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		981	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		982
		983	if (next->flags & CF_RUNNING)
		984	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		985
		986	if (next->flags & CF_DESTROYED)
		987	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		988
		989	if (PL_lex_state != LEX_NOTPARSING)
		990	croak ("Coro::State::transfer called while parsing, but this is not supported");
		991	}
		992	}
		993
		994	/* always use the TRANSFER macro */
		995	static void NOINLINE
695	transfer_impl (struct coro *prev, struct coro *next, int flags)	996	transfer (pTHX_ struct coro *prev, struct coro *next)
696	{	997	{
697	dSTACKLEVEL;	998	dSTACKLEVEL;
698		999
699	/* sometimes transfer is only called to set idle_sp */	1000	/* sometimes transfer is only called to set idle_sp */
700	if (flags == TRANSFER_SET_STACKLEVEL)	1001	if (!next)
		1002	{
701	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1003	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1004	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1005	}
702	else if (prev != next)	1006	else if (prev != next)
703	{	1007	{
704	coro_stack *prev__stack;	1008	coro_cctx *prev__cctx;
		1009
		1010	if (prev->flags & CF_NEW)
		1011	{
		1012	/* create a new empty context */
		1013	Newz (0, prev->cctx, 1, coro_cctx);
		1014	prev->flags &= ~CF_NEW;
		1015	prev->flags |= CF_RUNNING;
		1016	}
		1017
		1018	prev->flags &= ~CF_RUNNING;
		1019	next->flags |= CF_RUNNING;
705		1020
706	LOCK;	1021	LOCK;
707		1022
708	if (next->mainstack)	1023	if (next->flags & CF_NEW)
709	{	1024	{
710	/* coroutine already started */	1025	/* need to start coroutine */
711	SAVE (prev, flags);	1026	next->flags &= ~CF_NEW;
712	LOAD (next);	1027	/* first get rid of the old state */
		1028	save_perl (aTHX_ prev);
		1029	/* setup coroutine call */
		1030	coro_setup (aTHX_ next);
713	}	1031	}
714	else	1032	else
715	{	1033	{
716	/* need to start coroutine */	1034	/* coroutine already started */
717	/* first get rid of the old state */	1035	save_perl (aTHX_ prev);
718	SAVE (prev, -1);	1036	load_perl (aTHX_ next);
719	/* setup coroutine call */
720	setup_coro (next);
721	/* need a stack */
722	next->stack = 0;
723	}	1037	}
724		1038
725	if (!prev->stack)
726	/* create a new empty context */
727	Newz (0, prev->stack, 1, coro_stack);
728
729	prev__stack = prev->stack;	1039	prev__cctx = prev->cctx;
730		1040
731	/* possibly "free" the stack */	1041	/* possibly "free" the cctx */
732	if (prev__stack->idle_sp == STACKLEVEL)	1042	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
733	{	1043	{
734	stack_put (prev__stack);	1044	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1045	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1046
735	prev->stack = 0;	1047	prev->cctx = 0;
		1048
		1049	cctx_put (prev__cctx);
736	}	1050	}
737		1051
		1052	++next->usecount;
		1053
738	if (!next->stack)	1054	if (!next->cctx)
739	next->stack = stack_get ();	1055	next->cctx = cctx_get (aTHX);
740		1056
741	if (prev__stack != next->stack)	1057	if (prev__cctx != next->cctx)
742	{	1058	{
743	prev__stack->top_env = PL_top_env;	1059	prev__cctx->top_env = PL_top_env;
744	PL_top_env = next->stack->top_env;	1060	PL_top_env = next->cctx->top_env;
745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1061	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
746	}	1062	}
747		1063
748	free_coro_mortal ();	1064	free_coro_mortal (aTHX);
749
750	UNLOCK;	1065	UNLOCK;
751	}	1066	}
752	}	1067	}
753		1068
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	1069	struct transfer_args
760	{	1070	{
761	struct coro *prev, *next;	1071	struct coro *prev, *next;
762	int flags;
763	};	1072	};
764		1073
765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1074	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1075	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
766		1076
		1077	/** high level stuff ********************************************************/
		1078
767	static void	1079	static int
768	coro_state_destroy (struct coro *coro)	1080	coro_state_destroy (pTHX_ struct coro *coro)
769	{	1081	{
770	if (coro->refcnt--)	1082	if (coro->flags & CF_DESTROYED)
771	return;	1083	return 0;
		1084
		1085	coro->flags |= CF_DESTROYED;
		1086
		1087	if (coro->flags & CF_READY)
		1088	{
		1089	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1090	/* alternative: look through all ready queues and remove the coro */
		1091	LOCK;
		1092	--coro_nready;
		1093	UNLOCK;
		1094	}
		1095	else
		1096	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
772		1097
773	if (coro->mainstack && coro->mainstack != main_mainstack)	1098	if (coro->mainstack && coro->mainstack != main_mainstack)
774	{	1099	{
775	struct coro temp;	1100	struct coro temp;
776		1101
777	SAVE ((&temp), TRANSFER_SAVE_ALL);	1102	if (coro->flags & CF_RUNNING)
778	LOAD (coro);	1103	croak ("FATAL: tried to destroy currently running coroutine");
779		1104
780	destroy_stacks ();	1105	save_perl (aTHX_ &temp);
		1106	load_perl (aTHX_ coro);
781		1107
		1108	coro_destroy (aTHX_ coro);
		1109
782	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1110	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
783		1111
784	coro->mainstack = 0;	1112	coro->mainstack = 0;
785	}	1113	}
786		1114
787	stack_free (coro->stack);	1115	cctx_destroy (coro->cctx);
788	SvREFCNT_dec (coro->args);	1116	SvREFCNT_dec (coro->args);
789	Safefree (coro);	1117
		1118	if (coro->next) coro->next->prev = coro->prev;
		1119	if (coro->prev) coro->prev->next = coro->next;
		1120	if (coro == coro_first) coro_first = coro->next;
		1121
		1122	return 1;
790	}	1123	}
791		1124
792	static int	1125	static int
793	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1126	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
794	{	1127	{
795	struct coro *coro = (struct coro *)mg->mg_ptr;	1128	struct coro *coro = (struct coro *)mg->mg_ptr;
796	mg->mg_ptr = 0;	1129	mg->mg_ptr = 0;
797		1130
		1131	coro->hv = 0;
		1132
		1133	if (--coro->refcnt < 0)
		1134	{
798	coro_state_destroy (coro);	1135	coro_state_destroy (aTHX_ coro);
		1136	Safefree (coro);
		1137	}
799		1138
800	return 0;	1139	return 0;
801	}	1140	}
802		1141
803	static int	1142	static int
…		…
808	++coro->refcnt;	1147	++coro->refcnt;
809		1148
810	return 0;	1149	return 0;
811	}	1150	}
812		1151
813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1152	static MGVTBL coro_state_vtbl = {
		1153	0, 0, 0, 0,
		1154	coro_state_free,
		1155	0,
		1156	#ifdef MGf_DUP
		1157	coro_state_dup,
		1158	#else
		1159	# define MGf_DUP 0
		1160	#endif
		1161	};
814		1162
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	1163	static void
838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1164	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839	{	1165	{
840	ta->prev = SvSTATE (prev);	1166	ta->prev = SvSTATE (prev_sv);
841	ta->next = SvSTATE (next);	1167	ta->next = SvSTATE (next_sv);
842	ta->flags = flags;	1168	TRANSFER_CHECK (*ta);
843	}	1169	}
844		1170
845	static void	1171	static void
846	api_transfer (SV *prev, SV *next, int flags)	1172	api_transfer (SV *prev_sv, SV *next_sv)
847	{	1173	{
848	dTHX;	1174	dTHX;
849	struct transfer_args ta;	1175	struct transfer_args ta;
850		1176
851	prepare_transfer (&ta, prev, next, flags);	1177	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
852	TRANSFER (ta);	1178	TRANSFER (ta);
853	}	1179	}
854		1180
855	/** Coro ********************************************************************/	1181	/** Coro ********************************************************************/
856		1182
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	1183	static void
870	coro_enq (SV *sv)	1184	coro_enq (pTHX_ SV *coro_sv)
871	{	1185	{
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);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
880	coro_nready++;
881	}	1187	}
882		1188
883	static SV *	1189	static SV *
884	coro_deq (int min_prio)	1190	coro_deq (pTHX_ int min_prio)
885	{	1191	{
886	int prio = PRIO_MAX - PRIO_MIN;	1192	int prio = PRIO_MAX - PRIO_MIN;
887		1193
888	min_prio -= PRIO_MIN;	1194	min_prio -= PRIO_MIN;
889	if (min_prio < 0)	1195	if (min_prio < 0)
890	min_prio = 0;	1196	min_prio = 0;
891		1197
892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893	if (AvFILLp (coro_ready [prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
894	{
895	coro_nready--;
896	return av_shift (coro_ready [prio]);	1200	return av_shift (coro_ready [prio]);
897	}
898		1201
899	return 0;	1202	return 0;
900	}	1203	}
901		1204
902	static void	1205	static int
903	api_ready (SV *coro)	1206	api_ready (SV *coro_sv)
904	{	1207	{
905	dTHX;	1208	dTHX;
		1209	struct coro *coro;
906		1210
907	if (SvROK (coro))	1211	if (SvROK (coro_sv))
908	coro = SvRV (coro);	1212	coro_sv = SvRV (coro_sv);
		1213
		1214	coro = SvSTATE (coro_sv);
		1215
		1216	if (coro->flags & CF_READY)
		1217	return 0;
		1218
		1219	coro->flags |= CF_READY;
909		1220
910	LOCK;	1221	LOCK;
911	coro_enq (SvREFCNT_inc (coro));	1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
912	UNLOCK;	1224	UNLOCK;
913	}
914		1225
		1226	return 1;
		1227	}
		1228
915	static void	1229	static int
		1230	api_is_ready (SV *coro_sv)
		1231	{
		1232	dTHX;
		1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1234	}
		1235
		1236	static void
916	prepare_schedule (struct transfer_args *ta)	1237	prepare_schedule (pTHX_ struct transfer_args *ta)
917	{	1238	{
918	SV *current, *prev, *next;	1239	SV *prev_sv, *next_sv;
919
920	current = GvSV (coro_current);
921		1240
922	for (;;)	1241	for (;;)
923	{	1242	{
924	LOCK;	1243	LOCK;
925	next = coro_deq (PRIO_MIN);	1244	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1245
		1246	/* nothing to schedule: call the idle handler */
		1247	if (!next_sv)
		1248	{
		1249	dSP;
		1250	UNLOCK;
		1251
		1252	ENTER;
		1253	SAVETMPS;
		1254
		1255	PUSHMARK (SP);
		1256	PUTBACK;
		1257	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1258
		1259	FREETMPS;
		1260	LEAVE;
		1261	continue;
		1262	}
		1263
		1264	ta->next = SvSTATE (next_sv);
		1265
		1266	/* cannot transfer to destroyed coros, skip and look for next */
		1267	if (ta->next->flags & CF_DESTROYED)
		1268	{
		1269	UNLOCK;
		1270	SvREFCNT_dec (next_sv);
		1271	/* coro_nready is already taken care of by destroy */
		1272	continue;
		1273	}
		1274
		1275	--coro_nready;
926	UNLOCK;	1276	UNLOCK;
927
928	if (next)
929	break;	1277	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	}	1278	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948		1279
949	/* free this only after the transfer */	1280	/* free this only after the transfer */
		1281	prev_sv = SvRV (coro_current);
		1282	ta->prev = SvSTATE (prev_sv);
		1283	TRANSFER_CHECK (*ta);
		1284	assert (ta->next->flags & CF_READY);
		1285	ta->next->flags &= ~CF_READY;
		1286	SvRV_set (coro_current, next_sv);
		1287
950	LOCK;	1288	LOCK;
951	free_coro_mortal ();	1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
952	UNLOCK;	1291	UNLOCK;
953	coro_mortal = prev;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958	}	1292	}
959		1293
960	static void	1294	static void
961	prepare_cede (struct transfer_args *ta)	1295	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1296	{
963	LOCK;	1297	api_ready (coro_current);
964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1298	prepare_schedule (aTHX_ ta);
		1299	}
		1300
		1301	static int
		1302	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1303	{
		1304	if (coro_nready)
		1305	{
		1306	SV *prev = SvRV (coro_current);
		1307	prepare_schedule (aTHX_ ta);
		1308	api_ready (prev);
		1309	return 1;
		1310	}
		1311	else
		1312	return 0;
968	}	1313	}
969		1314
970	static void	1315	static void
971	api_schedule (void)	1316	api_schedule (void)
972	{	1317	{
973	dTHX;	1318	dTHX;
974	struct transfer_args ta;	1319	struct transfer_args ta;
975		1320
976	prepare_schedule (&ta);	1321	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1322	TRANSFER (ta);
978	}	1323	}
979		1324
980	static void	1325	static int
981	api_cede (void)	1326	api_cede (void)
982	{	1327	{
983	dTHX;	1328	dTHX;
984	struct transfer_args ta;	1329	struct transfer_args ta;
985		1330
986	prepare_cede (&ta);	1331	prepare_cede (aTHX_ &ta);
		1332
		1333	if (ta.prev != ta.next)
		1334	{
987	TRANSFER (ta);	1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
988	}	1340	}
989		1341
		1342	static int
		1343	api_cede_notself (void)
		1344	{
		1345	dTHX;
		1346	struct transfer_args ta;
		1347
		1348	if (prepare_cede_notself (aTHX_ &ta))
		1349	{
		1350	TRANSFER (ta);
		1351	return 1;
		1352	}
		1353	else
		1354	return 0;
		1355	}
		1356
		1357	static void
		1358	api_trace (SV *coro_sv, int flags)
		1359	{
		1360	dTHX;
		1361	struct coro *coro = SvSTATE (coro_sv);
		1362
		1363	if (flags & CC_TRACE)
		1364	{
		1365	if (!coro->cctx)
		1366	coro->cctx = cctx_new ();
		1367	else if (!(coro->cctx->flags & CC_TRACE))
		1368	croak ("cannot enable tracing on coroutine with custom stack");
		1369
		1370	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1371	}
		1372	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1373	{
		1374	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1375
		1376	if (coro->flags & CF_RUNNING)
		1377	PL_runops = RUNOPS_DEFAULT;
		1378	else
		1379	coro->runops = RUNOPS_DEFAULT;
		1380	}
		1381	}
		1382
990	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1384
992	PROTOTYPES: DISABLE	1385	PROTOTYPES: DISABLE
993		1386
994	BOOT:	1387	BOOT:
995	{	1388	{
996	#ifdef USE_ITHREADS	1389	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1390	MUTEX_INIT (&coro_mutex);
998	#endif	1391	#endif
999	BOOT_PAGESIZE;	1392	BOOT_PAGESIZE;
1000		1393
		1394	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1395
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1397
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1402
1007	main_mainstack = PL_mainstack;	1403	main_mainstack = PL_mainstack;
		1404	main_top_env = PL_top_env;
		1405
		1406	while (main_top_env->je_prev)
		1407	main_top_env = main_top_env->je_prev;
1008		1408
1009	coroapi.ver = CORO_API_VERSION;	1409	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1410	coroapi.transfer = api_transfer;
1011		1411
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1412	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1019	struct coro *coro;	1419	struct coro *coro;
1020	HV *hv;	1420	HV *hv;
1021	int i;	1421	int i;
1022		1422
1023	Newz (0, coro, 1, struct coro);	1423	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1424	coro->args = newAV ();
		1425	coro->flags = CF_NEW;
1025		1426
		1427	if (coro_first) coro_first->prev = coro;
		1428	coro->next = coro_first;
		1429	coro_first = coro;
		1430
1026	hv = newHV ();	1431	coro->hv = hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1432	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));	1433	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1434
1030	for (i = 1; i < items; i++)	1435	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1436	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1437	}
1036	OUTPUT:	1438	OUTPUT:
1037	RETVAL	1439	RETVAL
1038		1440
		1441	# these not obviously related functions are all rolled into the same xs
		1442	# function to increase chances that they all will call transfer with the same
		1443	# stack offset
1039	void	1444	void
1040	_set_stacklevel (...)	1445	_set_stacklevel (...)
1041	ALIAS:	1446	ALIAS:
1042	Coro::State::transfer = 1	1447	Coro::State::transfer = 1
1043	Coro::schedule = 2	1448	Coro::schedule = 2
1044	Coro::cede = 3	1449	Coro::cede = 3
1045	Coro::Cont::yield = 4	1450	Coro::cede_notself = 4
1046	CODE:	1451	CODE:
1047	{	1452	{
1048	struct transfer_args ta;	1453	struct transfer_args ta;
1049		1454
1050	switch (ix)	1455	switch (ix)
1051	{	1456	{
1052	case 0:	1457	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1458	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1459	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1460	break;
1057		1461
1058	case 1:	1462	case 1:
1059	if (items != 3)	1463	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1464	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1465
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1466	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1467	break;
1064		1468
1065	case 2:	1469	case 2:
1066	prepare_schedule (&ta);	1470	prepare_schedule (aTHX_ &ta);
1067	break;	1471	break;
1068		1472
1069	case 3:	1473	case 3:
1070	prepare_cede (&ta);	1474	prepare_cede (aTHX_ &ta);
1071	break;	1475	break;
1072		1476
1073	case 4:	1477	case 4:
1074	{	1478	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1479	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1480
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;	1481	break;
1098
1099	}	1482	}
1100		1483
		1484	BARRIER;
1101	TRANSFER (ta);	1485	TRANSFER (ta);
1102	}
1103		1486
1104	void	1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
1105	_clone_state_from (SV *dst, SV *src)	1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
1106	CODE:	1493	CODE:
1107	{	1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1495	OUTPUT:
1109		1496	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		1497
1122	void	1498	void
1123	_exit (code)	1499	_exit (code)
1124	int code	1500	int code
1125	PROTOTYPE: $	1501	PROTOTYPE: $
1126	CODE:	1502	CODE:
1127	_exit (code);	1503	_exit (code);
1128		1504
		1505	int
		1506	cctx_stacksize (int new_stacksize = 0)
		1507	CODE:
		1508	RETVAL = coro_stacksize;
		1509	if (new_stacksize)
		1510	coro_stacksize = new_stacksize;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
		1515	cctx_count ()
		1516	CODE:
		1517	RETVAL = cctx_count;
		1518	OUTPUT:
		1519	RETVAL
		1520
		1521	int
		1522	cctx_idle ()
		1523	CODE:
		1524	RETVAL = cctx_idle;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	void
		1529	list ()
		1530	PPCODE:
		1531	{
		1532	struct coro *coro;
		1533	for (coro = coro_first; coro; coro = coro->next)
		1534	if (coro->hv)
		1535	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1536	}
		1537
		1538	void
		1539	call (Coro::State coro, SV *coderef)
		1540	ALIAS:
		1541	eval = 1
		1542	CODE:
		1543	{
		1544	if (coro->mainstack)
		1545	{
		1546	struct coro temp;
		1547	Zero (&temp, 1, struct coro);
		1548
		1549	if (!(coro->flags & CF_RUNNING))
		1550	{
		1551	save_perl (aTHX_ &temp);
		1552	load_perl (aTHX_ coro);
		1553	}
		1554
		1555	{
		1556	dSP;
		1557	ENTER;
		1558	SAVETMPS;
		1559	PUSHMARK (SP);
		1560	PUTBACK;
		1561	if (ix)
		1562	eval_sv (coderef, 0);
		1563	else
		1564	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1565	SPAGAIN;
		1566	FREETMPS;
		1567	LEAVE;
		1568	PUTBACK;
		1569	}
		1570
		1571	if (!(coro->flags & CF_RUNNING))
		1572	{
		1573	save_perl (aTHX_ coro);
		1574	load_perl (aTHX_ &temp);
		1575	}
		1576	}
		1577	}
		1578
		1579	SV *
		1580	is_ready (Coro::State coro)
		1581	PROTOTYPE: $
		1582	ALIAS:
		1583	is_ready = CF_READY
		1584	is_running = CF_RUNNING
		1585	is_new = CF_NEW
		1586	is_destroyed = CF_DESTROYED
		1587	CODE:
		1588	RETVAL = boolSV (coro->flags & ix);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1594
		1595	SV *
		1596	has_stack (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = boolSV (!!coro->cctx);
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	is_traced (Coro::State coro)
		1605	PROTOTYPE: $
		1606	CODE:
		1607	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1608	OUTPUT:
		1609	RETVAL
		1610
		1611	IV
		1612	rss (Coro::State coro)
		1613	PROTOTYPE: $
		1614	ALIAS:
		1615	usecount = 1
		1616	CODE:
		1617	switch (ix)
		1618	{
		1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1620	case 1: RETVAL = coro->usecount; break;
		1621	}
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625
1129	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1130		1627
1131	BOOT:	1628	BOOT:
1132	{	1629	{
1133	int i;	1630	int i;
		1631
		1632	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1633	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1634	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1635
		1636	coro_current = get_sv ("Coro::current", FALSE);
		1637	SvREADONLY_on (coro_current);
1134		1638
1135	coro_stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1136		1640
1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1647
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--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1149		1650
1150	{	1651	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1152		1653
1153	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1154	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
		1658	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1158		1661
1159	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1664	SvREADONLY_on (sv);
1162	}	1665	}
1163	}	1666	}
		1667
		1668	void
		1669	_set_current (SV *current)
		1670	PROTOTYPE: $
		1671	CODE:
		1672	SvREFCNT_dec (SvRV (coro_current));
		1673	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1674
1165	int	1675	int
1166	prio (Coro::State coro, int newprio = 0)	1676	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1677	ALIAS:
1168	nice = 1	1678	nice = 1
…		…
1171	RETVAL = coro->prio;	1681	RETVAL = coro->prio;
1172		1682
1173	if (items > 1)	1683	if (items > 1)
1174	{	1684	{
1175	if (ix)	1685	if (ix)
1176	newprio += coro->prio;	1686	newprio = coro->prio - newprio;
1177		1687
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1690
1181	coro->prio = newprio;	1691	coro->prio = newprio;
1182	}	1692	}
1183	}	1693	}
		1694	OUTPUT:
		1695	RETVAL
1184		1696
1185	void	1697	SV *
1186	ready (SV *self)	1698	ready (SV *self)
1187	PROTOTYPE: $	1699	PROTOTYPE: $
1188	CODE:	1700	CODE:
1189	api_ready (self);	1701	RETVAL = boolSV (api_ready (self));
		1702	OUTPUT:
		1703	RETVAL
1190		1704
1191	int	1705	int
1192	nready (...)	1706	nready (...)
1193	PROTOTYPE:	1707	PROTOTYPE:
1194	CODE:	1708	CODE:
1195	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1196	OUTPUT:	1710	OUTPUT:
1197	RETVAL	1711	RETVAL
1198		1712
		1713	# for async_pool speedup
		1714	void
		1715	_pool_1 (SV *cb)
		1716	CODE:
		1717	{
		1718	struct coro *coro = SvSTATE (coro_current);
		1719	HV *hv = (HV *)SvRV (coro_current);
		1720	AV *defav = GvAV (PL_defgv);
		1721	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1722	AV *invoke_av;
		1723	int i, len;
		1724
		1725	coro->defoutgv = SvREFCNT_inc (PL_defoutgv);
		1726
		1727	if (!invoke)
		1728	croak ("\3terminate\2\n");
		1729
		1730	hv_store (hv, "desc", sizeof ("desc") - 1,
		1731	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1732
		1733	invoke_av = (AV *)SvRV (invoke);
		1734	len = av_len (invoke_av);
		1735
		1736	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1737
		1738	if (len > 0)
		1739	{
		1740	av_fill (defav, len - 1);
		1741	for (i = 0; i < len; ++i)
		1742	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1743	}
		1744
		1745
		1746
		1747	SvREFCNT_dec (invoke);
		1748	}
		1749
		1750	void
		1751	_pool_2 (SV *cb)
		1752	CODE:
		1753	{
		1754	struct coro *coro = SvSTATE (coro_current);
		1755
		1756	sv_setsv (cb, &PL_sv_undef);
		1757
		1758	SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->defoutgv;
		1759
		1760	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1761	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1762	croak ("\3terminate\2\n");
		1763
		1764	av_clear (GvAV (PL_defgv));
		1765	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1767
		1768	coro->prio = 0;
		1769
		1770	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1771	api_trace (coro_current, 0);
		1772
		1773	av_push (av_async_pool, newSVsv (coro_current));
		1774	}
		1775
		1776
1199	MODULE = Coro::State PACKAGE = Coro::AIO	1777	MODULE = Coro::State PACKAGE = Coro::AIO
1200		1778
1201	SV *	1779	SV *
1202	_get_state ()	1780	_get_state ()
1203	CODE:	1781	CODE:
1204	{	1782	{
1205	struct {	1783	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1784
		1785	RETVAL = newSV (sizeof (struct io_state));
		1786	data = (struct io_state *)SvPVX (RETVAL);
		1787	SvCUR_set (RETVAL, sizeof (struct io_state));
		1788	SvPOK_only (RETVAL);
		1789
1212	data.errorno = errno;	1790	data->errorno = errno;
1213	data.laststype = PL_laststype;	1791	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1792	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1793	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1794	}
1219	OUTPUT:	1795	OUTPUT:
1220	RETVAL	1796	RETVAL
1221		1797
1222	void	1798	void
1223	_set_state (char *data_)	1799	_set_state (char *data_)
1224	PROTOTYPE: $	1800	PROTOTYPE: $
1225	CODE:	1801	CODE:
1226	{	1802	{
1227	struct {	1803	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1804
1234	errno = data->errorno;	1805	errno = data->errorno;
1235	PL_laststype = data->laststype;	1806	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1807	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1808	PL_statcache = data->statcache;
1238	}	1809	}
		1810

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