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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 1.186 by root, Fri Oct 5 20:10:42 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	SV *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	SV *saved_deffh;
		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	GvSV (irsgv) = c->irssv_sv;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
307		396
308	{	397	{
309	dSP;	398	dSP;
310	CV *cv;	399	CV *cv;
311		400
312	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
314	{	403	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
321	}	406	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	407	}
325		408
326	PUTBACK;	409	PUTBACK;
327	}	410	}
328	}	411	}
329		412
330	static void	413	static void
331	save_state(Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
332	{	415	{
333	{	416	{
334	dSP;	417	dSP;
335	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	422	/*
340	* the worst thing you can imagine happens first - we have to save	423	* the worst thing you can imagine happens first - we have to save
341	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
342	*/	425	*/
343		426
344	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
346	for (;;)	429	for (;;)
347	{	430	{
348	while (cxix >= 0)	431	while (cxix >= 0)
349	{	432	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
351		434
352	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
353	{	436	{
354	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
355	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
356	{	440	{
357	EXTEND (SP, CvDEPTH(cv)*2);	441	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));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
368		445
		446	CvDEPTH (cv) = 0;
369	get_padlist (cv);	447	get_padlist (aTHX_ cv);
370	}	448	}
371	}	449	}
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	}	450	}
381		451
382	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
383	break;	453	break;
384		454
385	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
386	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
387	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
388	}	458	}
389		459
390	PUTBACK;	460	PUTBACK;
391	}	461	}
392		462
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
396		467
397	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	469	# include "state.h"
399		470	#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	}	471	}
431		472
432	/*	473	/*
433	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
437	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
438	static void	482	static void
439	coro_init_stacks ()	483	coro_init_stacks (pTHX)
440	{	484	{
441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	485	PL_curstackinfo = new_stackinfo(64, 6);
442	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
443	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445		489
446	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
447	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
448	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449		493
450	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
451	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
452	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
453	PL_tmps_max = 96;	497	PL_tmps_max = 64;
454		498
455	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
456	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
457	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
458		502
…		…
462		506
463	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
464	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
465	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
466		510
467	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
468	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
469	PL_savestack_max = 96;	513	PL_savestack_max = 64;
470		514
471	#if PERL_VERSION < 9	515	#if !PERL_VERSION_ATLEAST (5,9,0)
472	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
473	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
474	PL_retstack_max = 8;	518	PL_retstack_max = 4;
475	#endif	519	#endif
476	}	520	}
		521	#endif
477		522
478	/*	523	/*
479	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
480	*/	525	*/
481	static void	526	static void
482	destroy_stacks()	527	coro_destroy_stacks (pTHX)
483	{	528	{
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)	529	while (PL_curstackinfo->si_next)
496	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
497		531
498	while (PL_curstackinfo)	532	while (PL_curstackinfo)
499	{	533	{
500	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
501		535
502	{ /*D*//*remove*/
503	dSP;
504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505	PUTBACK; /* possibly superfluous */
506	}
507
508	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
509	{
510	dounwind (-1);/*D*//*remove*/
511	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
512	}
513		538
514	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
515	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
516	PL_curstackinfo = p;	541	PL_curstackinfo = p;
517	}	542	}
518		543
519	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
520	Safefree (PL_markstack);	545	Safefree (PL_markstack);
521	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
522	Safefree (PL_savestack);	547	Safefree (PL_savestack);
523	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
524	Safefree (PL_retstack);	549	Safefree (PL_retstack);
525	#endif	550	#endif
526	}	551	}
527		552
528	static void	553	static size_t
529	setup_coro (struct coro *coro)	554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (*coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		568	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/** coroutine stack handling ************************************************/
		585
		586	static void
		587	coro_setup (pTHX_ struct coro *coro)
530	{	588	{
531	/*	589	/*
532	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
533	*/	591	*/
534	dTHX;	592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = (GV *)NEWSV (0, 0);
		612	gv_init (PL_defoutgv, coro_state_stash, "stdout", sizeof ("stdout") - 1, 0);
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	GvIOp (PL_defoutgv) = io;
		617	}
		618
		619	{
		620	dSP;
		621	LOGOP myop;
		622
		623	Zero (&myop, 1, LOGOP);
		624	myop.op_next = Nullop;
		625	myop.op_flags = OPf_WANT_VOID;
		626
		627	PUSHMARK (SP);
		628	XPUSHs (av_shift (GvAV (PL_defgv)));
		629	PUTBACK;
		630	PL_op = (OP *)&myop;
		631	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		632	SPAGAIN;
		633	}
		634
		635	ENTER; /* necessary e.g. for dounwind */
		636	}
		637
		638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
		672	free_coro_mortal (pTHX)
		673	{
		674	if (coro_mortal)
		675	{
		676	SvREFCNT_dec (coro_mortal);
		677	coro_mortal = 0;
		678	}
		679	}
		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV **bot, **top;
		699	AV *av = newAV (); /* return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
		804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
		807	static void NOINLINE
		808	prepare_cctx (pTHX_ coro_cctx *cctx)
		809	{
535	dSP;	810	dSP;
536	UNOP myop;	811	LOGOP myop;
537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538		812
539	coro_init_stacks ();	813	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		814
545	SPAGAIN;	815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
546		817
547	Zero (&myop, 1, UNOP);	818	Zero (&myop, 1, LOGOP);
548	myop.op_next = Nullop;	819	myop.op_next = PL_op;
549	myop.op_flags = OPf_WANT_VOID;	820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550		821
		822	PUSHMARK (SP);
		823	EXTEND (SP, 2);
		824	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		825	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		826	PUTBACK;
551	PL_op = (OP *)&myop;	827	PL_op = (OP *)&myop;
552
553	PUSHMARK(SP);
554	XPUSHs (sub_init);
555	PUTBACK;
556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557	SPAGAIN;	829	SPAGAIN;
558
559	ENTER; /* necessary e.g. for dounwind */
560	}	830	}
561		831
562	static void	832	/*
563	free_coro_mortal ()	833	* this is a _very_ stripped down perl interpreter ;)
564	{	834	*/
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	835	static void
592	coro_run (void *arg)	836	coro_run (void *arg)
593	{	837	{
		838	dTHX;
		839
		840	/* coro_run is the alternative tail of transfer(), so unlock here. */
		841	UNLOCK;
		842
		843	/* we now skip the entersub that lead to transfer() */
		844	PL_op = PL_op->op_next;
		845
		846	/* inject a fake subroutine call to cctx_init */
		847	prepare_cctx (aTHX_ (coro_cctx *)arg);
		848
		849	/* somebody or something will hit me for both perl_run and PL_restartop */
		850	PL_restartop = PL_op;
		851	perl_run (PL_curinterp);
		852
594	/*	853	/*
595	* this is a _very_ stripped down perl interpreter ;)	854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
596	*/	859	*/
597	UNLOCK;
598
599	PL_top_env = &PL_start_env;	860	PL_top_env = main_top_env;
600	prepare_cctx ((coro_stack *)arg);	861	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	}	862	}
608		863
609	static coro_stack *	864	static coro_cctx *
610	stack_new ()	865	cctx_new ()
611	{	866	{
612	coro_stack *stack;	867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
613		870
		871	++cctx_count;
		872
614	New (0, stack, 1, coro_stack);	873	Newz (0, cctx, 1, coro_cctx);
615		874
616	#if HAVE_MMAP	875	#if HAVE_MMAP
617		876
618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
619	/* mmap suppsedly does allocate-on-write for us */	878	/* 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);	879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621		880
622	if (stack->sptr == (void *)-1)	881	if (cctx->sptr != (void *)-1)
623	{
624	perror ("FATAL: unable to mmap stack for coroutine");
625	_exit (EXIT_FAILURE);
626	}	882	{
627
628	# if STACKGUARD	883	# if CORO_STACKGUARD
629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
630	# endif	885	# endif
631		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
632	#else	887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
633		888	cctx->flags |= CC_MAPPED;
634	stack->ssize = STACKSIZE * (long)sizeof (long);
635	New (0, stack->sptr, STACKSIZE, long);
636
637	if (!stack->sptr)
638	{	889	}
		890	else
		891	#endif
		892	{
		893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
		895
		896	if (!cctx->sptr)
		897	{
639	perror (stderr, "FATAL: unable to malloc stack for coroutine");	898	perror ("FATAL: unable to allocate stack for coroutine");
640	_exit (EXIT_FAILURE);	899	_exit (EXIT_FAILURE);
641	}	900	}
642		901
643	#endif	902	stack_start = cctx->sptr;
		903	stack_size = cctx->ssize;
		904	}
644		905
		906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
646		908
647	return stack;	909	return cctx;
648	}	910	}
649		911
650	static void	912	static void
651	stack_free (coro_stack *stack)	913	cctx_destroy (coro_cctx *cctx)
652	{	914	{
653	if (!stack)	915	if (!cctx)
654	return;	916	return;
655		917
		918	--cctx_count;
		919
		920	#if CORO_USE_VALGRIND
		921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		922	#endif
		923
656	#if HAVE_MMAP	924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
657	munmap (stack->sptr, stack->ssize);	926	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	927	else
		928	#endif
		929	Safefree (cctx->sptr);
		930
		931	Safefree (cctx);
		932	}
		933
		934	static coro_cctx *
		935	cctx_get (pTHX)
		936	{
		937	while (cctx_first)
678	{	938	{
679	stack = stack_new ();	939	coro_cctx *cctx = cctx_first;
680	PL_op = PL_op->op_next;	940	cctx_first = cctx->next;
		941	--cctx_idle;
		942
		943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		944	return cctx;
		945
		946	cctx_destroy (cctx);
681	}	947	}
682		948
683	return stack;	949	return cctx_new ();
684	}	950	}
685		951
686	static void	952	static void
687	stack_put (coro_stack *stack)	953	cctx_put (coro_cctx *cctx)
688	{	954	{
689	stack->next = stack_first;	955	/* free another cctx if overlimit */
690	stack_first = stack;	956	if (cctx_idle >= MAX_IDLE_CCTX)
691	}	957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
692		961
693	/* never call directly, always through the coro_state_transfer global variable */	962	cctx_destroy (first);
694	static void	963	}
		964
		965	++cctx_idle;
		966	cctx->next = cctx_first;
		967	cctx_first = cctx;
		968	}
		969
		970	/** coroutine switching *****************************************************/
		971
		972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
695	transfer_impl (struct coro *prev, struct coro *next, int flags)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
696	{	994	{
697	dSTACKLEVEL;	995	dSTACKLEVEL;
698		996
699	/* sometimes transfer is only called to set idle_sp */	997	/* sometimes transfer is only called to set idle_sp */
700	if (flags == TRANSFER_SET_STACKLEVEL)	998	if (!next)
		999	{
701	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1001	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1002	}
702	else if (prev != next)	1003	else if (prev != next)
703	{	1004	{
704	coro_stack *prev__stack;	1005	coro_cctx *prev__cctx;
		1006
		1007	if (prev->flags & CF_NEW)
		1008	{
		1009	/* create a new empty context */
		1010	Newz (0, prev->cctx, 1, coro_cctx);
		1011	prev->flags &= ~CF_NEW;
		1012	prev->flags |= CF_RUNNING;
		1013	}
		1014
		1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags |= CF_RUNNING;
705		1017
706	LOCK;	1018	LOCK;
707		1019
708	if (next->mainstack)	1020	if (next->flags & CF_NEW)
709	{	1021	{
710	/* coroutine already started */	1022	/* need to start coroutine */
711	SAVE (prev, flags);	1023	next->flags &= ~CF_NEW;
712	LOAD (next);	1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
713	}	1028	}
714	else	1029	else
715	{	1030	{
716	/* need to start coroutine */	1031	/* coroutine already started */
717	/* first get rid of the old state */	1032	save_perl (aTHX_ prev);
718	SAVE (prev, -1);	1033	load_perl (aTHX_ next);
719	/* setup coroutine call */
720	setup_coro (next);
721	/* need a stack */
722	next->stack = 0;
723	}	1034	}
724		1035
725	if (!prev->stack)
726	/* create a new empty context */
727	Newz (0, prev->stack, 1, coro_stack);
728
729	prev__stack = prev->stack;	1036	prev__cctx = prev->cctx;
730		1037
731	/* possibly "free" the stack */	1038	/* possibly "free" the cctx */
732	if (prev__stack->idle_sp == STACKLEVEL)	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
733	{	1040	{
734	stack_put (prev__stack);	1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1043
735	prev->stack = 0;	1044	prev->cctx = 0;
		1045
		1046	cctx_put (prev__cctx);
736	}	1047	}
737		1048
		1049	++next->usecount;
		1050
738	if (!next->stack)	1051	if (!next->cctx)
739	next->stack = stack_get ();	1052	next->cctx = cctx_get (aTHX);
740		1053
741	if (prev__stack != next->stack)	1054	if (prev__cctx != next->cctx)
742	{	1055	{
743	prev__stack->top_env = PL_top_env;	1056	prev__cctx->top_env = PL_top_env;
744	PL_top_env = next->stack->top_env;	1057	PL_top_env = next->cctx->top_env;
745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
746	}	1059	}
747		1060
748	free_coro_mortal ();	1061	free_coro_mortal (aTHX);
749
750	UNLOCK;	1062	UNLOCK;
751	}	1063	}
752	}	1064	}
753		1065
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	1066	struct transfer_args
760	{	1067	{
761	struct coro *prev, *next;	1068	struct coro *prev, *next;
762	int flags;
763	};	1069	};
764		1070
765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
766		1073
		1074	/** high level stuff ********************************************************/
		1075
767	static void	1076	static int
768	coro_state_destroy (struct coro *coro)	1077	coro_state_destroy (pTHX_ struct coro *coro)
769	{	1078	{
770	if (coro->refcnt--)	1079	if (coro->flags & CF_DESTROYED)
771	return;	1080	return 0;
		1081
		1082	coro->flags |= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
		1085	{
		1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
		1091	}
		1092	else
		1093	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
772		1094
773	if (coro->mainstack && coro->mainstack != main_mainstack)	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
774	{	1096	{
775	struct coro temp;	1097	struct coro temp;
776		1098
777	SAVE ((&temp), TRANSFER_SAVE_ALL);	1099	if (coro->flags & CF_RUNNING)
778	LOAD (coro);	1100	croak ("FATAL: tried to destroy currently running coroutine");
779		1101
780	destroy_stacks ();	1102	save_perl (aTHX_ &temp);
		1103	load_perl (aTHX_ coro);
781		1104
		1105	coro_destroy (aTHX_ coro);
		1106
782	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
783		1108
784	coro->mainstack = 0;	1109	coro->mainstack = 0;
785	}	1110	}
786		1111
787	stack_free (coro->stack);	1112	cctx_destroy (coro->cctx);
788	SvREFCNT_dec (coro->args);	1113	SvREFCNT_dec (coro->args);
789	Safefree (coro);	1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
790	}	1120	}
791		1121
792	static int	1122	static int
793	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
794	{	1124	{
795	struct coro *coro = (struct coro *)mg->mg_ptr;	1125	struct coro *coro = (struct coro *)mg->mg_ptr;
796	mg->mg_ptr = 0;	1126	mg->mg_ptr = 0;
797		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
798	coro_state_destroy (coro);	1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
799		1135
800	return 0;	1136	return 0;
801	}	1137	}
802		1138
803	static int	1139	static int
…		…
808	++coro->refcnt;	1144	++coro->refcnt;
809		1145
810	return 0;	1146	return 0;
811	}	1147	}
812		1148
813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1149	static MGVTBL coro_state_vtbl = {
		1150	0, 0, 0, 0,
		1151	coro_state_free,
		1152	0,
		1153	#ifdef MGf_DUP
		1154	coro_state_dup,
		1155	#else
		1156	# define MGf_DUP 0
		1157	#endif
		1158	};
814		1159
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	1160	static void
838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1161	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839	{	1162	{
840	ta->prev = SvSTATE (prev);	1163	ta->prev = SvSTATE (prev_sv);
841	ta->next = SvSTATE (next);	1164	ta->next = SvSTATE (next_sv);
842	ta->flags = flags;	1165	TRANSFER_CHECK (*ta);
843	}	1166	}
844		1167
845	static void	1168	static void
846	api_transfer (SV *prev, SV *next, int flags)	1169	api_transfer (SV *prev_sv, SV *next_sv)
847	{	1170	{
848	dTHX;	1171	dTHX;
849	struct transfer_args ta;	1172	struct transfer_args ta;
850		1173
851	prepare_transfer (&ta, prev, next, flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
852	TRANSFER (ta);	1175	TRANSFER (ta);
853	}	1176	}
854		1177
855	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
856		1179
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	1180	static void
870	coro_enq (SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
871	{	1182	{
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);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
880	coro_nready++;
881	}	1184	}
882		1185
883	static SV *	1186	static SV *
884	coro_deq (int min_prio)	1187	coro_deq (pTHX_ int min_prio)
885	{	1188	{
886	int prio = PRIO_MAX - PRIO_MIN;	1189	int prio = PRIO_MAX - PRIO_MIN;
887		1190
888	min_prio -= PRIO_MIN;	1191	min_prio -= PRIO_MIN;
889	if (min_prio < 0)	1192	if (min_prio < 0)
890	min_prio = 0;	1193	min_prio = 0;
891		1194
892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893	if (AvFILLp (coro_ready [prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
894	{
895	coro_nready--;
896	return av_shift (coro_ready [prio]);	1197	return av_shift (coro_ready [prio]);
897	}
898		1198
899	return 0;	1199	return 0;
900	}	1200	}
901		1201
902	static void	1202	static int
903	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
904	{	1204	{
905	dTHX;	1205	dTHX;
		1206	struct coro *coro;
906		1207
907	if (SvROK (coro))	1208	if (SvROK (coro_sv))
908	coro = SvRV (coro);	1209	coro_sv = SvRV (coro_sv);
		1210
		1211	coro = SvSTATE (coro_sv);
		1212
		1213	if (coro->flags & CF_READY)
		1214	return 0;
		1215
		1216	coro->flags |= CF_READY;
909		1217
910	LOCK;	1218	LOCK;
911	coro_enq (SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
912	UNLOCK;	1221	UNLOCK;
913	}
914		1222
		1223	return 1;
		1224	}
		1225
915	static void	1226	static int
		1227	api_is_ready (SV *coro_sv)
		1228	{
		1229	dTHX;
		1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1231	}
		1232
		1233	static void
916	prepare_schedule (struct transfer_args *ta)	1234	prepare_schedule (pTHX_ struct transfer_args *ta)
917	{	1235	{
918	SV *current, *prev, *next;	1236	SV *prev_sv, *next_sv;
919
920	current = GvSV (coro_current);
921		1237
922	for (;;)	1238	for (;;)
923	{	1239	{
924	LOCK;	1240	LOCK;
925	next = coro_deq (PRIO_MIN);	1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
926	UNLOCK;	1273	UNLOCK;
927
928	if (next)
929	break;	1274	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	}	1275	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948		1276
949	/* free this only after the transfer */	1277	/* free this only after the transfer */
		1278	prev_sv = SvRV (coro_current);
		1279	ta->prev = SvSTATE (prev_sv);
		1280	TRANSFER_CHECK (*ta);
		1281	assert (ta->next->flags & CF_READY);
		1282	ta->next->flags &= ~CF_READY;
		1283	SvRV_set (coro_current, next_sv);
		1284
950	LOCK;	1285	LOCK;
951	free_coro_mortal ();	1286	free_coro_mortal (aTHX);
		1287	coro_mortal = prev_sv;
952	UNLOCK;	1288	UNLOCK;
953	coro_mortal = prev;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958	}	1289	}
959		1290
960	static void	1291	static void
961	prepare_cede (struct transfer_args *ta)	1292	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1293	{
963	LOCK;	1294	api_ready (coro_current);
964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
968	}	1310	}
969		1311
970	static void	1312	static void
971	api_schedule (void)	1313	api_schedule (void)
972	{	1314	{
973	dTHX;	1315	dTHX;
974	struct transfer_args ta;	1316	struct transfer_args ta;
975		1317
976	prepare_schedule (&ta);	1318	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1319	TRANSFER (ta);
978	}	1320	}
979		1321
980	static void	1322	static int
981	api_cede (void)	1323	api_cede (void)
982	{	1324	{
983	dTHX;	1325	dTHX;
984	struct transfer_args ta;	1326	struct transfer_args ta;
985		1327
986	prepare_cede (&ta);	1328	prepare_cede (aTHX_ &ta);
		1329
		1330	if (ta.prev != ta.next)
		1331	{
987	TRANSFER (ta);	1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
988	}	1337	}
989		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
990	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1381
992	PROTOTYPES: DISABLE	1382	PROTOTYPES: DISABLE
993		1383
994	BOOT:	1384	BOOT:
995	{	1385	{
996	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
998	#endif	1388	#endif
999	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
1000		1390
		1391	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1392
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1393	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1394
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1399
1007	main_mainstack = PL_mainstack;	1400	main_mainstack = PL_mainstack;
		1401	main_top_env = PL_top_env;
		1402
		1403	while (main_top_env->je_prev)
		1404	main_top_env = main_top_env->je_prev;
1008		1405
1009	coroapi.ver = CORO_API_VERSION;	1406	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1407	coroapi.transfer = api_transfer;
1011		1408
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1409	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1019	struct coro *coro;	1416	struct coro *coro;
1020	HV *hv;	1417	HV *hv;
1021	int i;	1418	int i;
1022		1419
1023	Newz (0, coro, 1, struct coro);	1420	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1421	coro->args = newAV ();
		1422	coro->flags = CF_NEW;
1025		1423
		1424	if (coro_first) coro_first->prev = coro;
		1425	coro->next = coro_first;
		1426	coro_first = coro;
		1427
1026	hv = newHV ();	1428	coro->hv = hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1429	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));	1430	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1431
1030	for (i = 1; i < items; i++)	1432	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1433	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1434	}
1036	OUTPUT:	1435	OUTPUT:
1037	RETVAL	1436	RETVAL
1038		1437
		1438	# these not obviously related functions are all rolled into the same xs
		1439	# function to increase chances that they all will call transfer with the same
		1440	# stack offset
1039	void	1441	void
1040	_set_stacklevel (...)	1442	_set_stacklevel (...)
1041	ALIAS:	1443	ALIAS:
1042	Coro::State::transfer = 1	1444	Coro::State::transfer = 1
1043	Coro::schedule = 2	1445	Coro::schedule = 2
1044	Coro::cede = 3	1446	Coro::cede = 3
1045	Coro::Cont::yield = 4	1447	Coro::cede_notself = 4
1046	CODE:	1448	CODE:
1047	{	1449	{
1048	struct transfer_args ta;	1450	struct transfer_args ta;
1049		1451
1050	switch (ix)	1452	switch (ix)
1051	{	1453	{
1052	case 0:	1454	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1455	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1456	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1457	break;
1057		1458
1058	case 1:	1459	case 1:
1059	if (items != 3)	1460	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1461	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1462
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1463	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1464	break;
1064		1465
1065	case 2:	1466	case 2:
1066	prepare_schedule (&ta);	1467	prepare_schedule (aTHX_ &ta);
1067	break;	1468	break;
1068		1469
1069	case 3:	1470	case 3:
1070	prepare_cede (&ta);	1471	prepare_cede (aTHX_ &ta);
1071	break;	1472	break;
1072		1473
1073	case 4:	1474	case 4:
1074	{	1475	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1476	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1477
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;	1478	break;
1098
1099	}	1479	}
1100		1480
		1481	BARRIER;
1101	TRANSFER (ta);	1482	TRANSFER (ta);
1102	}
1103		1483
1104	void	1484	if (GIMME_V != G_VOID && ta.next != ta.prev)
1105	_clone_state_from (SV *dst, SV *src)	1485	XSRETURN_YES;
		1486	}
		1487
		1488	bool
		1489	_destroy (SV *coro_sv)
1106	CODE:	1490	CODE:
1107	{	1491	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1492	OUTPUT:
1109		1493	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		1494
1122	void	1495	void
1123	_exit (code)	1496	_exit (code)
1124	int code	1497	int code
1125	PROTOTYPE: $	1498	PROTOTYPE: $
1126	CODE:	1499	CODE:
1127	_exit (code);	1500	_exit (code);
1128		1501
		1502	int
		1503	cctx_stacksize (int new_stacksize = 0)
		1504	CODE:
		1505	RETVAL = coro_stacksize;
		1506	if (new_stacksize)
		1507	coro_stacksize = new_stacksize;
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	int
		1512	cctx_count ()
		1513	CODE:
		1514	RETVAL = cctx_count;
		1515	OUTPUT:
		1516	RETVAL
		1517
		1518	int
		1519	cctx_idle ()
		1520	CODE:
		1521	RETVAL = cctx_idle;
		1522	OUTPUT:
		1523	RETVAL
		1524
		1525	void
		1526	list ()
		1527	PPCODE:
		1528	{
		1529	struct coro *coro;
		1530	for (coro = coro_first; coro; coro = coro->next)
		1531	if (coro->hv)
		1532	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1533	}
		1534
		1535	void
		1536	call (Coro::State coro, SV *coderef)
		1537	ALIAS:
		1538	eval = 1
		1539	CODE:
		1540	{
		1541	if (coro->mainstack)
		1542	{
		1543	struct coro temp;
		1544	Zero (&temp, 1, struct coro);
		1545
		1546	if (!(coro->flags & CF_RUNNING))
		1547	{
		1548	save_perl (aTHX_ &temp);
		1549	load_perl (aTHX_ coro);
		1550	}
		1551
		1552	{
		1553	dSP;
		1554	ENTER;
		1555	SAVETMPS;
		1556	PUSHMARK (SP);
		1557	PUTBACK;
		1558	if (ix)
		1559	eval_sv (coderef, 0);
		1560	else
		1561	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1562	SPAGAIN;
		1563	FREETMPS;
		1564	LEAVE;
		1565	PUTBACK;
		1566	}
		1567
		1568	if (!(coro->flags & CF_RUNNING))
		1569	{
		1570	save_perl (aTHX_ coro);
		1571	load_perl (aTHX_ &temp);
		1572	}
		1573	}
		1574	}
		1575
		1576	SV *
		1577	is_ready (Coro::State coro)
		1578	PROTOTYPE: $
		1579	ALIAS:
		1580	is_ready = CF_READY
		1581	is_running = CF_RUNNING
		1582	is_new = CF_NEW
		1583	is_destroyed = CF_DESTROYED
		1584	CODE:
		1585	RETVAL = boolSV (coro->flags & ix);
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	void
		1590	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1591
		1592	SV *
		1593	has_stack (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = boolSV (!!coro->cctx);
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	is_traced (Coro::State coro)
		1602	PROTOTYPE: $
		1603	CODE:
		1604	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1605	OUTPUT:
		1606	RETVAL
		1607
		1608	IV
		1609	rss (Coro::State coro)
		1610	PROTOTYPE: $
		1611	ALIAS:
		1612	usecount = 1
		1613	CODE:
		1614	switch (ix)
		1615	{
		1616	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1617	case 1: RETVAL = coro->usecount; break;
		1618	}
		1619	OUTPUT:
		1620	RETVAL
		1621
		1622
1129	MODULE = Coro::State PACKAGE = Coro	1623	MODULE = Coro::State PACKAGE = Coro
1130		1624
1131	BOOT:	1625	BOOT:
1132	{	1626	{
1133	int i;	1627	int i;
		1628
		1629	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1630	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1631	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1632
		1633	coro_current = get_sv ("Coro::current", FALSE);
		1634	SvREADONLY_on (coro_current);
1134		1635
1135	coro_stash = gv_stashpv ("Coro", TRUE);	1636	coro_stash = gv_stashpv ("Coro", TRUE);
1136		1637
1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1638	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1639	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1640	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1641	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1642	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1643	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1644
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--; )	1645	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1646	coro_ready[i] = newAV ();
1149		1647
1150	{	1648	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1649	SV *sv = perl_get_sv("Coro::API", 1);
1152		1650
1153	coroapi.schedule = api_schedule;	1651	coroapi.schedule = api_schedule;
1154	coroapi.cede = api_cede;	1652	coroapi.cede = api_cede;
		1653	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1654	coroapi.ready = api_ready;
		1655	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1656	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1657	coroapi.current = coro_current;
1158		1658
1159	GCoroAPI = &coroapi;	1659	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1660	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1661	SvREADONLY_on (sv);
1162	}	1662	}
1163	}	1663	}
		1664
		1665	void
		1666	_set_current (SV *current)
		1667	PROTOTYPE: $
		1668	CODE:
		1669	SvREFCNT_dec (SvRV (coro_current));
		1670	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1671
1165	int	1672	int
1166	prio (Coro::State coro, int newprio = 0)	1673	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1674	ALIAS:
1168	nice = 1	1675	nice = 1
…		…
1171	RETVAL = coro->prio;	1678	RETVAL = coro->prio;
1172		1679
1173	if (items > 1)	1680	if (items > 1)
1174	{	1681	{
1175	if (ix)	1682	if (ix)
1176	newprio += coro->prio;	1683	newprio = coro->prio - newprio;
1177		1684
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1685	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1686	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1687
1181	coro->prio = newprio;	1688	coro->prio = newprio;
1182	}	1689	}
1183	}	1690	}
		1691	OUTPUT:
		1692	RETVAL
1184		1693
1185	void	1694	SV *
1186	ready (SV *self)	1695	ready (SV *self)
1187	PROTOTYPE: $	1696	PROTOTYPE: $
1188	CODE:	1697	CODE:
1189	api_ready (self);	1698	RETVAL = boolSV (api_ready (self));
		1699	OUTPUT:
		1700	RETVAL
1190		1701
1191	int	1702	int
1192	nready (...)	1703	nready (...)
1193	PROTOTYPE:	1704	PROTOTYPE:
1194	CODE:	1705	CODE:
1195	RETVAL = coro_nready;	1706	RETVAL = coro_nready;
1196	OUTPUT:	1707	OUTPUT:
1197	RETVAL	1708	RETVAL
1198		1709
		1710	# for async_pool speedup
		1711	void
		1712	_pool_1 (SV *cb)
		1713	CODE:
		1714	{
		1715	struct coro *coro = SvSTATE (coro_current);
		1716	HV *hv = (HV *)SvRV (coro_current);
		1717	AV *defav = GvAV (PL_defgv);
		1718	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1719	AV *invoke_av;
		1720	int i, len;
		1721
		1722	if (!invoke)
		1723	croak ("\3terminate\2\n");
		1724
		1725	SvREFCNT_dec (coro->saved_deffh);
		1726	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1727
		1728	hv_store (hv, "desc", sizeof ("desc") - 1,
		1729	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1730
		1731	invoke_av = (AV *)SvRV (invoke);
		1732	len = av_len (invoke_av);
		1733
		1734	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1735
		1736	if (len > 0)
		1737	{
		1738	av_fill (defav, len - 1);
		1739	for (i = 0; i < len; ++i)
		1740	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1741	}
		1742
		1743	SvREFCNT_dec (invoke);
		1744	}
		1745
		1746	void
		1747	_pool_2 (SV *cb)
		1748	CODE:
		1749	{
		1750	struct coro *coro = SvSTATE (coro_current);
		1751
		1752	sv_setsv (cb, &PL_sv_undef);
		1753
		1754	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1755	coro->saved_deffh = 0;
		1756
		1757	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1758	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1759	croak ("\3terminate\2\n");
		1760
		1761	av_clear (GvAV (PL_defgv));
		1762	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1763	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1764
		1765	coro->prio = 0;
		1766
		1767	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1768	api_trace (coro_current, 0);
		1769
		1770	av_push (av_async_pool, newSVsv (coro_current));
		1771	}
		1772
		1773
1199	MODULE = Coro::State PACKAGE = Coro::AIO	1774	MODULE = Coro::State PACKAGE = Coro::AIO
1200		1775
1201	SV *	1776	SV *
1202	_get_state ()	1777	_get_state ()
1203	CODE:	1778	CODE:
1204	{	1779	{
1205	struct {	1780	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1781
		1782	RETVAL = newSV (sizeof (struct io_state));
		1783	data = (struct io_state *)SvPVX (RETVAL);
		1784	SvCUR_set (RETVAL, sizeof (struct io_state));
		1785	SvPOK_only (RETVAL);
		1786
1212	data.errorno = errno;	1787	data->errorno = errno;
1213	data.laststype = PL_laststype;	1788	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1789	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1790	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1791	}
1219	OUTPUT:	1792	OUTPUT:
1220	RETVAL	1793	RETVAL
1221		1794
1222	void	1795	void
1223	_set_state (char *data_)	1796	_set_state (char *data_)
1224	PROTOTYPE: $	1797	PROTOTYPE: $
1225	CODE:	1798	CODE:
1226	{	1799	{
1227	struct {	1800	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1801
1234	errno = data->errorno;	1802	errno = data->errorno;
1235	PL_laststype = data->laststype;	1803	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1804	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1805	PL_statcache = data->statcache;
1238	}	1806	}
		1807

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