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Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.192 by root, Fri Oct 5 21:51:40 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
34		87
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	89	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	90	#endif
53	# include <limits.h>	91
54	# ifndef PAGESIZE	92	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	93	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	94	#endif
61	#endif
62		95
63	/* The next macro should declare a variable stacklevel that contains and approximation	96	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	97	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
68		105
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		107
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	#else
		112	# define attribute(x)
		113	# define BARRIER
		114	#endif
		115
		116	#define NOINLINE attribute ((noinline))
72		117
73	#include "CoroAPI.h"	118	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		119
77	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	124	#else
82	# define LOCK (void)0	125	# define LOCK (void)0
83	# define UNLOCK (void)0	126	# define UNLOCK (void)0
84	#endif	127	#endif
85		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
86	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
87	static AV *main_mainstack; /* used to differentiate between $main and others */	140	static AV *main_mainstack; /* used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
88	static HV *coro_state_stash, *coro_stash;	142	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	143	static SV *coro_mortal; /* will be freed after next transfer */
90		144
		145	static GV *irsgv; /* $/ */
		146	static GV *stdoutgv; /* *STDOUT */
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
		153	static struct coro_cctx *cctx_first;
		154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		163	};
		164
91	/* this is a structure representing a c-level coroutine */	165	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	166	typedef struct coro_cctx {
93	struct coro_stack *next;	167	struct coro_cctx *next;
94		168
95	/* the stack */	169	/* the stack */
96	void *sptr;	170	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	171	size_t ssize;
98		172
99	/* cpu state */	173	/* cpu state */
100	void *idle_sp; /* original stacklevel when coroutine was created */	174	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		175	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
101	JMPENV *top_env;	176	JMPENV *top_env;
102	coro_context cctx;	177	coro_context cctx;
103	} coro_stack;
104		178
105	/* the (fake) coro_stack representing the main program */	179	#if CORO_USE_VALGRIND
106	static coro_stack *main_stack;	180	int valgrind_id;
		181	#endif
		182	unsigned char flags;
		183	} coro_cctx;
		184
		185	enum {
		186	CF_RUNNING = 0x0001, /* coroutine is running */
		187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		190	};
107		191
108	/* this is a structure representing a perl-level coroutine */	192	/* this is a structure representing a perl-level coroutine */
109	struct coro {	193	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	194	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	195	coro_cctx *cctx;
112		196
113	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
114	AV *args;	198	AV *args;
115	int refcnt;	199	int refcnt;
		200	int flags; /* CF_ flags */
116		201
117	/* optionally saved, might be zero */	202	/* optionally saved, might be zero */
118	AV *defav;	203	AV *defav; /* @_ */
119	SV *defsv;	204	SV *defsv; /* $_ */
120	SV *errsv;	205	SV *errsv; /* $@ */
		206	SV *deffh; /* default filehandle */
		207	SV *irssv; /* $/ */
		208	SV *irssv_sv; /* real $/ cache */
121		209
122	/* saved global state not related to stacks */	210	#define VAR(name,type) type name;
123	U8 dowarn;	211	# include "state.h"
124	I32 in_eval;	212	#undef VAR
125		213
126	/* the stacks and related info (callchain etc..) */	214	/* statistics */
127	PERL_SI *curstackinfo;	215	int usecount; /* number of transfers to this coro */
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		216
156	/* coro process data */	217	/* coro process data */
157	int prio;	218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro *next, *prev;
		226	HV *hv; /* the perl hash associated with this coro, if any */
158	};	227	};
159		228
160	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
162		231
		232	/** Coro ********************************************************************/
		233
		234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/** lowlevel stuff **********************************************************/
		248
163	static AV *	249	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	250	coro_clone_padlist (pTHX_ CV *cv)
165	{	251	{
166	AV *padlist = CvPADLIST (cv);	252	AV *padlist = CvPADLIST (cv);
167	AV *newpadlist, *newpad;	253	AV *newpadlist, *newpad;
168		254
169	newpadlist = newAV ();	255	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	256	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	257	#if PERL_VERSION_ATLEAST (5,9,0)
		258	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		259	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	260	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	261	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	262	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	263	--AvFILLp (padlist);
178		264
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	265	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
223		309
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	310	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		311
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		313
		314	#define CORO_MAGIC(cv) \
		315	SvMAGIC (cv) \
		316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		317	? SvMAGIC (cv) \
		318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		319	: 0
		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		346
228	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
229	static void	348	static void
230	get_padlist (pTHX_ CV *cv)	349	get_padlist (pTHX_ CV *cv)
231	{	350	{
232	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
233		353
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	356	else
237	{	357	{
238	#if 0	358	#if CORO_PREFER_PERL_FUNCTIONS
239	/* this should work - but it doesn't :( */	359	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	360	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	361	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	362	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	363	SvREFCNT_dec (cp);
244	#else	364	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
248	}	368	}
249		369
250	static void	370	static void
251	put_padlist (pTHX_ CV *cv)	371	put_padlist (pTHX_ CV *cv)
252	{	372	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	373	MAGIC *mg = CORO_MAGIC (cv);
		374	AV *av;
254		375
255	if (!mg)	376	if (!mg)
256	{	377	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	380	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	381	mg->mg_obj = (SV *)newAV ();
261	}	382	}
262		383
263	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	384	av = (AV *)mg->mg_obj;
264	}
265		385
266	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
267	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
268		388
269	#define LOAD(state) load_state(aTHX_ (state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	390	}
271		391
272	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	392	/** load & save, init *******************************************************/
273		393
274	static void	394	static void
275	load_state(pTHX_ Coro__State c)	395	load_perl (pTHX_ Coro__State c)
276	{	396	{
277	PL_dowarn = c->dowarn;	397	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	398	# include "state.h"
		399	#undef VAR
279		400
280	PL_curstackinfo = c->curstackinfo;	401	GvSV (PL_defgv) = c->defsv;
281	PL_curstack = c->curstack;	402	GvAV (PL_defgv) = c->defav;
282	PL_mainstack = c->mainstack;	403	GvSV (PL_errgv) = c->errsv;
283	PL_stack_sp = c->stack_sp;	404	GvSV (irsgv) = c->irssv_sv;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
314		405
315	{	406	{
316	dSP;	407	dSP;
317	CV *cv;	408	CV *cv;
318		409
319	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
321	{	412	{
322	AV *padlist = (AV *)POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
328	}	415	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	416	}
332		417
333	PUTBACK;	418	PUTBACK;
334	}	419	}
335	}	420	}
336		421
337	static void	422	static void
338	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
339	{	424	{
340	{	425	{
341	dSP;	426	dSP;
342	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	431	/*
347	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
348	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
349	*/	434	*/
350		435
351	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
353	for (;;)	438	for (;;)
354	{	439	{
355	while (cxix >= 0)	440	while (cxix >= 0)
356	{	441	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
358		443
359	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
360	{	445	{
361	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
362	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
363	{	449	{
364	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
375		454
		455	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	456	get_padlist (aTHX_ cv);
377	}	457	}
378	}	458	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	459	}
388		460
389	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
390	break;	462	break;
391		463
392	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
395	}	467	}
396		468
397	PUTBACK;	469	PUTBACK;
398	}	470	}
399		471
400	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
402	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
403		476
404	c->dowarn = PL_dowarn;	477	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	478	# include "state.h"
406		479	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	480	}
438		481
439	/*	482	/*
440	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
444	*/	487	*/
		488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
445	static void	491	static void
446	coro_init_stacks (pTHX)	492	coro_init_stacks (pTHX)
447	{	493	{
448	LOCK;	494	PL_curstackinfo = new_stackinfo(64, 6);
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		498
455	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		502
459	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
460	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	506	PL_tmps_max = 64;
463		507
464	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
467		511
…		…
471		515
472	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
475		519
476	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	522	PL_savestack_max = 64;
479		523
480	#if PERL_VERSION < 9	524	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	527	PL_retstack_max = 4;
484	#endif	528	#endif
485
486	UNLOCK;
487	}	529	}
		530	#endif
488		531
489	/*	532	/*
490	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
491	*/	534	*/
492	static void	535	static void
493	destroy_stacks(pTHX)	536	coro_destroy_stacks (pTHX)
494	{	537	{
495	if (!IN_DESTRUCT)
496	{
497	/* is this ugly, I ask? */
498	LEAVE_SCOPE (0);
499
500	/* sure it is, but more important: is it correct?? :/ */
501	FREETMPS;
502
503	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504	}
505
506	while (PL_curstackinfo->si_next)	538	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
508		540
509	while (PL_curstackinfo)	541	while (PL_curstackinfo)
510	{	542	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
512		544
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		547
525	Safefree (PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	549	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	550	PL_curstackinfo = p;
528	}	551	}
529		552
530	Safefree (PL_tmps_stack);	553	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	554	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	555	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	556	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	557	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	558	Safefree (PL_retstack);
536	#endif	559	#endif
537	}	560	}
538		561
539	static void	562	static size_t
540	setup_coro (struct coro *coro)	563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
		570	{
		571	#define VAR(name,type)coro->name = PL_ ## name;
		572	# include "state.h"
		573	#undef VAR
		574	}
		575
		576	rss += sizeof (coro->curstackinfo);
		577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
		584
		585	#if !PERL_VERSION_ATLEAST (5,9,0)
		586	rss += coro->retstack_max * sizeof (OP *);
		587	#endif
		588	}
		589
		590	return rss;
		591	}
		592
		593	/** coroutine stack handling ************************************************/
		594
		595	static void
		596	coro_setup (pTHX_ struct coro *coro)
541	{	597	{
542	/*	598	/*
543	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
544	*/	600	*/
545	dTHX;	601	coro_init_stacks (aTHX);
		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
		606	PL_comppad = 0;
		607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	ENTER; /* necessary e.g. for dounwind */
		620
		621	{
		622	dSP;
		623	LOGOP myop;
		624
		625	Zero (&myop, 1, LOGOP);
		626	myop.op_next = Nullop;
		627	myop.op_flags = OPf_WANT_VOID;
		628
		629	PUSHMARK (SP);
		630	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		631	PUTBACK;
		632	PL_op = (OP *)&myop;
		633	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		634	SPAGAIN;
		635	}
		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	{
546	dSP;	810	dSP;
547	UNOP myop;	811	LOGOP myop;
548	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549		812
550	coro_init_stacks (aTHX);	813	PL_top_env = &PL_start_env;
551	/*PL_curcop = 0;*/
552	/*PL_in_eval = PL_in_eval;*/ /* inherit */
553	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;
555		814
556	SPAGAIN;	815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
557		817
558	Zero (&myop, 1, UNOP);	818	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	819	myop.op_next = PL_op;
560	myop.op_flags = OPf_WANT_VOID;	820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561		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;
562	PL_op = (OP *)&myop;	827	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	829	SPAGAIN;
569
570	ENTER; /* necessary e.g. for dounwind */
571	}	830	}
572		831
573	static void	832	/*
574	free_coro_mortal ()	833	* this is a _very_ stripped down perl interpreter ;)
575	{	834	*/
576	if (coro_mortal)
577	{
578	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;
580	}
581	}
582
583	static void	835	static void
584	coro_run (void *arg)	836	coro_run (void *arg)
585	{	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
586	/*	853	/*
587	* 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
588	*/	859	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	860	PL_top_env = main_top_env;
594		861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
597
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */
602	perl_run (aTHX_ PERL_GET_CONTEXT);
603
604	abort ();
605	}	862	}
606		863
607	static coro_stack *	864	static coro_cctx *
608	stack_new ()	865	cctx_new ()
609	{	866	{
610	coro_stack *stack;	867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
611		870
		871	++cctx_count;
		872
612	New (0, stack, 1, coro_stack);	873	Newz (0, cctx, 1, coro_cctx);
613		874
614	#if HAVE_MMAP	875	#if HAVE_MMAP
615		876
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		878	/* mmap supposedly does allocate-on-write for us */
617	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);
618		880
619	if (stack->sptr == (void *)-1)	881	if (cctx->sptr != (void *)-1)
		882	{
		883	# if CORO_STACKGUARD
		884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		885	# endif
		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		888	cctx->flags |= CC_MAPPED;
620	{	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	{
621	perror ("FATAL: unable to mmap stack for coroutine");	898	perror ("FATAL: unable to allocate stack for coroutine");
622	_exit (EXIT_FAILURE);	899	_exit (EXIT_FAILURE);
623	}	900	}
624		901
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	902	stack_start = cctx->sptr;
626		903	stack_size = cctx->ssize;
627	#else
628
629	stack->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);
631
632	if (!stack->sptr)
633	{	904	}
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);
636	}
637		905
638	#endif	906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
639
640	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);
641		908
642	return stack;	909	return cctx;
643	}	910	}
644		911
645	static void	912	static void
646	stack_free (coro_stack *stack)	913	cctx_destroy (coro_cctx *cctx)
647	{	914	{
648	if (!stack || stack == main_stack)	915	if (!cctx)
649	return;	916	return;
650		917
		918	--cctx_count;
		919
		920	#if CORO_USE_VALGRIND
		921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		922	#endif
		923
651	#if HAVE_MMAP	924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
652	munmap (stack->sptr, stack->ssize);	926	munmap (cctx->sptr, cctx->ssize);
653	#else
654	Safefree (stack->sptr);
655	#endif
656
657	Safefree (stack);
658	}
659
660	static coro_stack *stack_first;
661
662	static coro_stack *
663	stack_get ()
664	{
665	coro_stack *stack;
666
667	if (stack_first)
668	{
669	stack = stack_first;
670	stack_first = stack->next;
671	}
672	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)
673	{	938	{
674	stack = stack_new ();	939	coro_cctx *cctx = cctx_first;
675	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);
676	}	947	}
677		948
678	return stack;	949	return cctx_new ();
679	}	950	}
680		951
681	static void	952	static void
682	stack_put (coro_stack *stack)	953	cctx_put (coro_cctx *cctx)
683	{	954	{
684	stack->next = stack_first;	955	/* free another cctx if overlimit */
685	stack_first = stack;	956	if (cctx_idle >= MAX_IDLE_CCTX)
686	}	957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
687		961
688	/* never call directly, always through the coro_state_transfer global variable */	962	cctx_destroy (first);
689	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
690	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
691	{	994	{
692	dSTACKLEVEL;	995	dSTACKLEVEL;
693		996
694	/* sometimes transfer is only called to set idle_sp */	997	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	998	if (!next)
		999	{
696	((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	}
697	else if (prev != next)	1003	else if (prev != next)
698	{	1004	{
699	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;
700		1017
701	LOCK;	1018	LOCK;
702		1019
703	if (next->mainstack)	1020	if (next->flags & CF_NEW)
704	{	1021	{
705	/* coroutine already started */	1022	/* need to start coroutine */
706	SAVE (prev, flags);	1023	next->flags &= ~CF_NEW;
707	LOAD (next);	1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
708	}	1028	}
709	else	1029	else
710	{	1030	{
711	/* need to start coroutine */	1031	/* coroutine already started */
712	/* first get rid of the old state */	1032	save_perl (aTHX_ prev);
713	SAVE (prev, -1);	1033	load_perl (aTHX_ next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	1034	}
719		1035
720	prev__stack = prev->stack;	1036	prev__cctx = prev->cctx;
721		1037
722	/* possibly "free" the stack */	1038	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
724	{	1040	{
725	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
726	prev->stack = 0;	1044	prev->cctx = 0;
		1045
		1046	cctx_put (prev__cctx);
727	}	1047	}
728		1048
		1049	++next->usecount;
		1050
729	if (!next->stack)	1051	if (!next->cctx)
730	next->stack = stack_get ();	1052	next->cctx = cctx_get (aTHX);
731		1053
732	if (prev__stack != next->stack)	1054	if (prev__cctx != next->cctx)
733	{	1055	{
734	prev__stack->top_env = PL_top_env;	1056	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->stack->top_env;	1057	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	1059	}
738		1060
739	free_coro_mortal ();	1061	free_coro_mortal (aTHX);
740
741	UNLOCK;	1062	UNLOCK;
742	}	1063	}
743	}	1064	}
744		1065
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	1066	struct transfer_args
751	{	1067	{
752	struct coro *prev, *next;	1068	struct coro *prev, *next;
753	int flags;
754	};	1069	};
755		1070
756	#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)
757		1073
		1074	/** high level stuff ********************************************************/
		1075
758	static void	1076	static int
759	coro_state_destroy (struct coro *coro)	1077	coro_state_destroy (pTHX_ struct coro *coro)
760	{	1078	{
761	if (coro->refcnt--)	1079	if (coro->flags & CF_DESTROYED)
762	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 */
763		1094
764	if (coro->mainstack && coro->mainstack != main_mainstack)	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	1096	{
766	struct coro temp;	1097	struct coro temp;
767		1098
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1099	if (coro->flags & CF_RUNNING)
		1100	croak ("FATAL: tried to destroy currently running coroutine");
		1101
		1102	save_perl (aTHX_ &temp);
769	LOAD (aTHX_ coro);	1103	load_perl (aTHX_ coro);
770		1104
771	destroy_stacks (aTHX);	1105	coro_destroy (aTHX_ coro);
772		1106
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
774		1108
775	coro->mainstack = 0;	1109	coro->mainstack = 0;
776	}	1110	}
777		1111
778	stack_free (coro->stack);	1112	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	1113	SvREFCNT_dec (coro->args);
780	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;
781	}	1120	}
782		1121
783	static int	1122	static int
784	coro_state_clear (SV *sv, MAGIC *mg)	1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
785	{	1124	{
786	struct coro *coro = (struct coro *)mg->mg_ptr;	1125	struct coro *coro = (struct coro *)mg->mg_ptr;
787	mg->mg_ptr = 0;	1126	mg->mg_ptr = 0;
788		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
789	coro_state_destroy (coro);	1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
790		1135
791	return 0;	1136	return 0;
792	}	1137	}
793		1138
794	static int	1139	static int
795	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1140	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796	{	1141	{
797	struct coro *coro = (struct coro *)mg->mg_ptr;	1142	struct coro *coro = (struct coro *)mg->mg_ptr;
798		1143
799	++coro->refcnt;	1144	++coro->refcnt;
800		1145
801	return 0;	1146	return 0;
802	}	1147	}
803		1148
804	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	};
805		1159
806	static struct coro *
807	SvSTATE (SV *coro)
808	{
809	HV *stash;
810	MAGIC *mg;
811
812	if (SvROK (coro))
813	coro = SvRV (coro);
814
815	stash = SvSTASH (coro);
816	if (stash != coro_stash && stash != coro_state_stash)
817	{
818	/* very slow, but rare, check */
819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820	croak ("Coro::State object required");
821	}
822
823	mg = SvMAGIC (coro);
824	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;
826	}
827
828	static void	1160	static void
829	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1161	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830	{	1162	{
831	ta->prev = SvSTATE (prev);	1163	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	1164	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;	1165	TRANSFER_CHECK (*ta);
834	}	1166	}
835		1167
836	static void	1168	static void
837	api_transfer (SV *prev, SV *next, int flags)	1169	api_transfer (SV *prev_sv, SV *next_sv)
838	{	1170	{
839	dTHX;	1171	dTHX;
840	struct transfer_args ta;	1172	struct transfer_args ta;
841		1173
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
843	TRANSFER (ta);	1175	TRANSFER (ta);
844	}	1176	}
845		1177
846	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
847		1179
848	#define PRIO_MAX 3
849	#define PRIO_HIGH 1
850	#define PRIO_NORMAL 0
851	#define PRIO_LOW -1
852	#define PRIO_IDLE -3
853	#define PRIO_MIN -4
854
855	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;
859
860	static void	1180	static void
861	coro_enq (pTHX_ SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
862	{	1182	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;
872	}	1184	}
873		1185
874	static SV *	1186	static SV *
875	coro_deq (pTHX_ int min_prio)	1187	coro_deq (pTHX_ int min_prio)
876	{	1188	{
…		…
880	if (min_prio < 0)	1192	if (min_prio < 0)
881	min_prio = 0;	1193	min_prio = 0;
882		1194
883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
884	if (AvFILLp (coro_ready [prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
885	{
886	coro_nready--;
887	return av_shift (coro_ready [prio]);	1197	return av_shift (coro_ready [prio]);
888	}
889		1198
890	return 0;	1199	return 0;
891	}	1200	}
892		1201
893	static void	1202	static int
894	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
895	{	1204	{
896	dTHX;	1205	dTHX;
		1206	struct coro *coro;
897		1207
898	if (SvROK (coro))	1208	if (SvROK (coro_sv))
899	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;
900		1217
901	LOCK;	1218	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
903	UNLOCK;	1221	UNLOCK;
904	}
905		1222
		1223	return 1;
		1224	}
		1225
906	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
907	prepare_schedule (aTHX_ struct transfer_args *ta)	1234	prepare_schedule (pTHX_ struct transfer_args *ta)
908	{	1235	{
909	SV *current, *prev, *next;	1236	SV *prev_sv, *next_sv;
		1237
		1238	for (;;)
		1239	{
		1240	LOCK;
		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;
		1273	UNLOCK;
		1274	break;
		1275	}
		1276
		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);
910		1284
911	LOCK;	1285	LOCK;
912
913	current = GvSV (coro_current);
914
915	for (;;)
916	{
917	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);
920
921	if (next)
922	break;
923
924	UNLOCK;
925
926	{
927	dSP;
928
929	ENTER;
930	SAVETMPS;
931
932	PUSHMARK (SP);
933	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);
935
936	FREETMPS;
937	LEAVE;
938	}
939	}
940
941	prev = SvRV (current);
942	SvRV (current) = next;
943
944	/* free this only after the transfer */
945	free_coro_mortal ();	1286	free_coro_mortal (aTHX);
946	coro_mortal = prev;	1287	coro_mortal = prev_sv;
947
948	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951
952	UNLOCK;	1288	UNLOCK;
953	}	1289	}
954		1290
955	static void	1291	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1292	prepare_cede (pTHX_ struct transfer_args *ta)
957	{	1293	{
958	LOCK;	1294	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961
962	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;
963	}	1310	}
964		1311
965	static void	1312	static void
966	api_schedule (void)	1313	api_schedule (void)
967	{	1314	{
968	dTHX;	1315	dTHX;
969	struct transfer_args ta;	1316	struct transfer_args ta;
970		1317
971	prepare_schedule (&ta);	1318	prepare_schedule (aTHX_ &ta);
972	TRANSFER (ta);	1319	TRANSFER (ta);
973	}	1320	}
974		1321
975	static void	1322	static int
976	api_cede (void)	1323	api_cede (void)
977	{	1324	{
978	dTHX;	1325	dTHX;
979	struct transfer_args ta;	1326	struct transfer_args ta;
980		1327
981	prepare_cede (&ta);	1328	prepare_cede (aTHX_ &ta);
		1329
		1330	if (ta.prev != ta.next)
		1331	{
982	TRANSFER (ta);	1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
983	}	1337	}
984		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
985	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
986		1381
987	PROTOTYPES: DISABLE	1382	PROTOTYPES: DISABLE
988		1383
989	BOOT:	1384	BOOT:
990	{	1385	{
991	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
992	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
993	#endif	1388	#endif
994	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
995		1390
		1391	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1392	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1393
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1395
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1001		1400
1002	main_mainstack = PL_mainstack;	1401	main_mainstack = PL_mainstack;
		1402	main_top_env = PL_top_env;
		1403
		1404	while (main_top_env->je_prev)
		1405	main_top_env = main_top_env->je_prev;
1003		1406
1004	coroapi.ver = CORO_API_VERSION;	1407	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1408	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1409
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1410	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1411	}
1012		1412
1013	SV *	1413	SV *
…		…
1017	struct coro *coro;	1417	struct coro *coro;
1018	HV *hv;	1418	HV *hv;
1019	int i;	1419	int i;
1020		1420
1021	Newz (0, coro, 1, struct coro);	1421	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1422	coro->args = newAV ();
		1423	coro->flags = CF_NEW;
1023		1424
		1425	if (coro_first) coro_first->prev = coro;
		1426	coro->next = coro_first;
		1427	coro_first = coro;
		1428
1024	hv = newHV ();	1429	coro->hv = hv = newHV ();
1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1430	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1431	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1432
		1433	av_extend (coro->args, items - 1);
		1434
1028	for (i = 1; i < items; i++)	1435	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1436	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1033	/*coro->stack = 0;*/
1034	}	1437	}
1035	OUTPUT:	1438	OUTPUT:
1036	RETVAL	1439	RETVAL
1037		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
1038	void	1444	void
1039	transfer (...)	1445	_set_stacklevel (...)
1040	ALIAS:	1446	ALIAS:
1041	Coro::schedule = 1	1447	Coro::State::transfer = 1
1042	Coro::cede = 2	1448	Coro::schedule = 2
1043	_set_stacklevel = 3	1449	Coro::cede = 3
		1450	Coro::cede_notself = 4
1044	CODE:	1451	CODE:
1045	{	1452	{
1046	struct transfer_args ta;	1453	struct transfer_args ta;
1047		1454
1048	switch (ix)	1455	switch (ix)
1049	{	1456	{
1050	case 0:	1457	case 0:
1051	if (items != 3)	1458	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1459	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1460	break;
1056		1461
1057	case 1:	1462	case 1:
1058	prepare_schedule (&ta);	1463	if (items != 2)
		1464	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1465
		1466	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1059	break;	1467	break;
1060		1468
1061	case 2:	1469	case 2:
1062	prepare_cede (&ta);	1470	prepare_schedule (aTHX_ &ta);
1063	break;	1471	break;
1064		1472
1065	case 3:	1473	case 3:
1066	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1474	prepare_cede (aTHX_ &ta);
1067	ta.next = 0;	1475	break;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;	1476
		1477	case 4:
		1478	if (!prepare_cede_notself (aTHX_ &ta))
		1479	XSRETURN_EMPTY;
		1480
1069	break;	1481	break;
1070	}	1482	}
1071		1483
		1484	BARRIER;
1072	TRANSFER (ta);	1485	TRANSFER (ta);
1073	}
1074		1486
1075	void	1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
1076	_clone_state_from (SV *dst, SV *src)	1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
1077	CODE:	1493	CODE:
1078	{	1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1079	struct coro *coro_src = SvSTATE (src);	1495	OUTPUT:
1080		1496	RETVAL
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1497
1093	void	1498	void
1094	_exit (code)	1499	_exit (code)
1095	int code	1500	int code
1096	PROTOTYPE: $	1501	PROTOTYPE: $
1097	CODE:	1502	CODE:
1098	_exit (code);	1503	_exit (code);
1099		1504
1100	MODULE = Coro::State PACKAGE = Coro::Cont	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
1101		1527
1102	void	1528	void
1103	yield (...)	1529	list ()
1104	PROTOTYPE: @	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
1105	CODE:	1616	CODE:
1106	{	1617	switch (ix)
1107	SV *yieldstack;	1618	{
1108	SV *sv;	1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1109	AV *defav = GvAV (PL_defgv);	1620	case 1: RETVAL = coro->usecount; break;
1110	struct coro *prev, *next;
1111
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0	1621	}
1116	);	1622	OUTPUT:
		1623	RETVAL
1117		1624
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1625
1132	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1133		1627
1134	BOOT:	1628	BOOT:
1135	{	1629	{
1136	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);
1137		1638
1138	coro_stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1139		1640
1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1647
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1149
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1152		1650
1153	{	1651	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1155		1653
1156	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1157	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1158	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
		1658	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1161		1661
1162	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1664	SvREADONLY_on (sv);
1165	}	1665	}
1166	}	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)));
1167		1674
1168	int	1675	int
1169	prio (Coro::State coro, int newprio = 0)	1676	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1677	ALIAS:
1171	nice = 1	1678	nice = 1
…		…
1174	RETVAL = coro->prio;	1681	RETVAL = coro->prio;
1175		1682
1176	if (items > 1)	1683	if (items > 1)
1177	{	1684	{
1178	if (ix)	1685	if (ix)
1179	newprio += coro->prio;	1686	newprio = coro->prio - newprio;
1180		1687
1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183		1690
1184	coro->prio = newprio;	1691	coro->prio = newprio;
1185	}	1692	}
1186	}	1693	}
		1694	OUTPUT:
		1695	RETVAL
1187		1696
1188	void	1697	SV *
1189	ready (SV *self)	1698	ready (SV *self)
1190	PROTOTYPE: $	1699	PROTOTYPE: $
1191	CODE:	1700	CODE:
1192	api_ready (self);	1701	RETVAL = boolSV (api_ready (self));
		1702	OUTPUT:
		1703	RETVAL
1193		1704
1194	int	1705	int
1195	nready (...)	1706	nready (...)
1196	PROTOTYPE:	1707	PROTOTYPE:
1197	CODE:	1708	CODE:
1198	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1199	OUTPUT:	1710	OUTPUT:
1200	RETVAL	1711	RETVAL
1201		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	if (!invoke)
		1726	croak ("\3terminate\2\n");
		1727
		1728	SvREFCNT_dec (coro->saved_deffh);
		1729	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1730
		1731	hv_store (hv, "desc", sizeof ("desc") - 1,
		1732	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1733
		1734	invoke_av = (AV *)SvRV (invoke);
		1735	len = av_len (invoke_av);
		1736
		1737	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1738
		1739	if (len > 0)
		1740	{
		1741	av_fill (defav, len - 1);
		1742	for (i = 0; i < len; ++i)
		1743	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1744	}
		1745
		1746	SvREFCNT_dec (invoke);
		1747	}
		1748
		1749	void
		1750	_pool_2 (SV *cb)
		1751	CODE:
		1752	{
		1753	struct coro *coro = SvSTATE (coro_current);
		1754
		1755	sv_setsv (cb, &PL_sv_undef);
		1756
		1757	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1758	coro->saved_deffh = 0;
		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
1202	MODULE = Coro::State PACKAGE = Coro::AIO	1777	MODULE = Coro::State PACKAGE = Coro::AIO
1203		1778
1204	SV *	1779	SV *
1205	_get_state ()	1780	_get_state ()
1206	CODE:	1781	CODE:
1207	{	1782	{
1208	struct {	1783	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		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
1215	data.errorno = errno;	1790	data->errorno = errno;
1216	data.laststype = PL_laststype;	1791	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1792	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1793	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1794	}
1222	OUTPUT:	1795	OUTPUT:
1223	RETVAL	1796	RETVAL
1224		1797
1225	void	1798	void
1226	_set_state (char *data_)	1799	_set_state (char *data_)
1227	PROTOTYPE: $	1800	PROTOTYPE: $
1228	CODE:	1801	CODE:
1229	{	1802	{
1230	struct {	1803	struct io_state *data = (void *)data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} *data = (void *)data_;
1236		1804
1237	errno = data->errorno;	1805	errno = data->errorno;
1238	PL_laststype = data->laststype;	1806	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1807	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1808	PL_statcache = data->statcache;
1241	}	1809	}
		1810

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