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Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.187 by root, Fri Oct 5 20:31:18 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 <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
64		92
65	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
67	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
69		97
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		99
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
73		109
74	#include "CoroAPI.h"	110	#include "CoroAPI.h"
75		111
76	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
80	#else	116	#else
81	# define LOCK (void)0	117	# define LOCK (void)0
82	# define UNLOCK (void)0	118	# define UNLOCK (void)0
83	#endif	119	#endif
84		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;
85	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
86	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;
87	static HV *coro_state_stash;	134	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
91		136
92	/* this is actually not only the c stack but also c registers etc... */	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
		156	/* this is a structure representing a c-level coroutine */
93	typedef struct {	157	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		159
		160	/* the stack */
		161	void *sptr;
		162	size_t ssize;
		163
		164	/* cpu state */
		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 */
		167	JMPENV *top_env;
98	coro_context cctx;	168	coro_context cctx;
99		169
100	void *sptr;	170	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
102	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
103		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	};
		182
		183	/* this is a structure representing a perl-level coroutine */
104	struct coro {	184	struct coro {
105	/* the optional C context */	185	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	186	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109
110	/* optionally saved, might be zero */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
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	JMPENV *top_env;
149
150	/* coro process data */
151	int prio;
152		187
153	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
154	AV *args;	189	AV *args;
155	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
		192
		193	/* optionally saved, might be zero */
		194	AV *defav; /* @_ */
		195	SV *defsv; /* $_ */
		196	SV *errsv; /* $@ */
		197	SV *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
		200
		201	#define VAR(name,type) type name;
		202	# include "state.h"
		203	#undef VAR
		204
		205	/* statistics */
		206	int usecount; /* number of transfers to this coro */
		207
		208	/* coro process data */
		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 */
156	};	218	};
157		219
158	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
160		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
161	static AV *	240	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
163	{	242	{
164	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	244	AV *newpadlist, *newpad;
166		245
167	newpadlist = newAV ();	246	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	248	#if PERL_VERSION_ATLEAST (5,9,0)
		249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		250	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	252	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	254	--AvFILLp (padlist);
176		255
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	256	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
221		300
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		302
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		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
226	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
227	static void	339	static void
228	get_padlist (pTHX_ CV *cv)	340	get_padlist (pTHX_ CV *cv)
229	{	341	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
231		344
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	347	else
235	{	348	{
236	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	350	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	351	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
242	#else	355	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	359	}
247		360
248	static void	361	static void
249	put_padlist (pTHX_ CV *cv)	362	put_padlist (pTHX_ CV *cv)
250	{	363	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
252		366
253	if (!mg)	367	if (!mg)
254	{	368	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
259	}	373	}
260		374
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
262	}
263		376
264	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
265	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
266		379
267	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
269		382
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/** load & save, init *******************************************************/
271		384
272	static void	385	static void
273	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
274	{	387	{
275	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
276	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
277		391
278	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
279	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
280	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
281	PL_stack_sp = c->stack_sp;	395	GvSV (irsgv) = c->irssv_sv;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308	PL_top_env = c->top_env;
309
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
313		396
314	{	397	{
315	dSP;	398	dSP;
316	CV *cv;	399	CV *cv;
317		400
318	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
320	{	403	{
321	AV *padlist = (AV *)POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
327	}	406	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	407	}
331		408
332	PUTBACK;	409	PUTBACK;
333	}	410	}
334	}	411	}
335		412
336	static void	413	static void
337	save_state(pTHX_ Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
338	{	415	{
339	{	416	{
340	dSP;	417	dSP;
341	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	422	/*
346	* 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
347	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
348	*/	425	*/
349		426
350	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
352	for (;;)	429	for (;;)
353	{	430	{
354	while (cxix >= 0)	431	while (cxix >= 0)
355	{	432	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
357		434
358	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
359	{	436	{
360	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
361	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
362	{	440	{
363	EXTEND (SP, CvDEPTH(cv)*2);	441	EXTEND (SP, 3);
364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
374		445
		446	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	447	get_padlist (aTHX_ cv);
376	}	448	}
377	}	449	}
378	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)
380	{
381	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}
385	#endif
386	}	450	}
387		451
388	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
389	break;	453	break;
390		454
391	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
392	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
393	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
394	}	458	}
395		459
396	PUTBACK;	460	PUTBACK;
397	}	461	}
398		462
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
402		467
403	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	469	# include "state.h"
405		470	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	c->top_env = PL_top_env;
437	}	471	}
438		472
439	/*	473	/*
440	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
444	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
445	static void	482	static void
446	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
447	{	484	{
448	LOCK;	485	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;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		489
455	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		493
459	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
460	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	497	PL_tmps_max = 64;
463		498
464	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
467		502
…		…
471		506
472	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
475		510
476	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	513	PL_savestack_max = 64;
479		514
480	#if PERL_VERSION < 9	515	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	518	PL_retstack_max = 4;
484	#endif	519	#endif
485
486	UNLOCK;
487	}	520	}
		521	#endif
488		522
489	/*	523	/*
490	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
491	*/	525	*/
492	static void	526	static void
493	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
494	{	528	{
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)	529	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
508		531
509	while (PL_curstackinfo)	532	while (PL_curstackinfo)
510	{	533	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
512		535
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		538
525	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	541	PL_curstackinfo = p;
528	}	542	}
529		543
530	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	545	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	547	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	549	Safefree (PL_retstack);
536	#endif	550	#endif
537	}	551	}
538		552
539	static void	553	static size_t
540	allocate_stack (Coro__State ctx, int alloc)	554	coro_rss (pTHX_ struct coro *coro)
541	{	555	{
542	coro_stack *stack;	556	size_t rss = sizeof (*coro);
543		557
544	New (0, stack, 1, coro_stack);	558	if (coro->mainstack)
545
546	stack->refcnt = 1;
547	stack->usecnt = 1;
548	stack->gencnt = ctx->gencnt = 0;
549
550	if (alloc)
551	{	559	{
552	#if HAVE_MMAP	560	if (coro->flags & CF_RUNNING)
553	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555	if (stack->sptr != (void *)-1)
556	{	561	{
557	# if STACKGUARD	562	#define VAR(name,type)coro->name = PL_ ## name;
558	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	563	# include "state.h"
559	# endif	564	#undef VAR
560	}	565	}
561	else
562	#endif
563	{
564	stack->ssize = - (STACKSIZE * (long)sizeof (long));
565	New (0, stack->sptr, STACKSIZE, long);
566	}
567	}
568	else
569	stack->sptr = 0;
570		566
571	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
572	}	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);
573		575
574	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
575	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
576	{	578	#endif
577	coro_stack *stack = ctx->stack;
578
579	ctx->stack = 0;
580
581	if (stack)
582	{	579	}
583	if (!--stack->refcnt)
584	{
585	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);
588	else
589	#endif
590	Safefree (stack->sptr);
591		580
592	Safefree (stack);	581	return rss;
593	}
594	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;
596	}
597	}	582	}
598		583
		584	/** coroutine stack handling ************************************************/
		585
599	static void	586	static void
600	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
601	{	588	{
602	/*	589	/*
603	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
604	*/	591	*/
		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	SvREFCNT_inc (PL_defoutgv);
		610
		611	{
		612	dSP;
		613	LOGOP myop;
		614
		615	Zero (&myop, 1, LOGOP);
		616	myop.op_next = Nullop;
		617	myop.op_flags = OPf_WANT_VOID;
		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
		622	PL_op = (OP *)&myop;
		623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		624	SPAGAIN;
		625	}
		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
		630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
		664	free_coro_mortal (pTHX)
		665	{
		666	if (coro_mortal)
		667	{
		668	SvREFCNT_dec (coro_mortal);
		669	coro_mortal = 0;
		670	}
		671	}
		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV **bot, **top;
		691	AV *av = newAV (); /* return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
		799	static void NOINLINE
		800	prepare_cctx (pTHX_ coro_cctx *cctx)
		801	{
		802	dSP;
		803	LOGOP myop;
		804
		805	PL_top_env = &PL_start_env;
		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
		810	Zero (&myop, 1, LOGOP);
		811	myop.op_next = PL_op;
		812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		813
		814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		818	PUTBACK;
		819	PL_op = (OP *)&myop;
		820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		821	SPAGAIN;
		822	}
		823
		824	/*
		825	* this is a _very_ stripped down perl interpreter ;)
		826	*/
		827	static void
		828	coro_run (void *arg)
		829	{
605	dTHX;	830	dTHX;
606	dSP;
607	Coro__State ctx = (Coro__State)arg;
608	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609		831
610	coro_init_stacks (aTHX);	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
611	/*PL_curcop = 0;*/	833	UNLOCK;
612	/*PL_in_eval = PL_in_eval;*/ /* inherit */
613	SvREFCNT_dec (GvAV (PL_defgv));
614	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
615		834
616	SPAGAIN;	835	/* we now skip the entersub that lead to transfer() */
		836	PL_op = PL_op->op_next;
617		837
618	if (ctx->stack)	838	/* inject a fake subroutine call to cctx_init */
619	{	839	prepare_cctx (aTHX_ (coro_cctx *)arg);
620	ctx->cursp = 0;
621		840
622	PUSHMARK(SP);	841	/* somebody or something will hit me for both perl_run and PL_restartop */
623	PUTBACK;	842	PL_restartop = PL_op;
624	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	843	perl_run (PL_curinterp);
625		844
626	if (SvTRUE (ERRSV))	845	/*
627	croak (NULL);	846	* If perl-run returns we assume exit() was being called or the coro
628	else	847	* fell off the end, which seems to be the only valid (non-bug)
629	croak ("FATAL: CCTXT coroutine returned!");	848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
		851	*/
		852	PL_top_env = main_top_env;
		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		854	}
		855
		856	static coro_cctx *
		857	cctx_new ()
		858	{
		859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
		862
		863	++cctx_count;
		864
		865	Newz (0, cctx, 1, coro_cctx);
		866
		867	#if HAVE_MMAP
		868
		869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		870	/* mmap supposedly does allocate-on-write for us */
		871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		872
		873	if (cctx->sptr != (void *)-1)
		874	{
		875	# if CORO_STACKGUARD
		876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags |= CC_MAPPED;
630	}	881	}
631	else	882	else
632	{	883	#endif
633	UNOP myop;
634
635	Zero(&myop, 1, UNOP);
636	myop.op_next = Nullop;
637	myop.op_flags = OPf_WANT_VOID;
638
639	PL_op = (OP *)&myop;
640
641	PUSHMARK(SP);
642	XPUSHs (sub_init);
643	/*
644	* the next line is slightly wrong, as PL_op->op_next
645	* is actually being executed so we skip the first op.
646	* that doesn't matter, though, since it is only
647	* pp_nextstate and we never return...
648	* ah yes, and I don't care anyways ;)
649	*/
650	PUTBACK;
651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652	SPAGAIN;
653
654	ENTER; /* necessary e.g. for dounwind */
655	}	884	{
656	}	885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
657		887
658	static void	888	if (!cctx->sptr)
659	continue_coro (void *arg)	889	{
660	{	890	perror ("FATAL: unable to allocate stack for coroutine");
661	/*	891	_exit (EXIT_FAILURE);
662	* this is a _very_ stripped down perl interpreter ;)	892	}
663	*/
664	dTHX;
665	Coro__State ctx = (Coro__State)arg;
666		893
667	PL_top_env = &PL_start_env;	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
668		897
669	ctx->cursp = 0;	898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
670	PL_op = PL_op->op_next;	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
671	CALLRUNOPS(aTHX);
672		900
673	abort ();	901	return cctx;
674	}	902	}
675		903
676	/* never call directly, always through the coro_state_transfer global variable */
677	static void	904	static void
		905	cctx_destroy (coro_cctx *cctx)
		906	{
		907	if (!cctx)
		908	return;
		909
		910	--cctx_count;
		911
		912	#if CORO_USE_VALGRIND
		913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		914	#endif
		915
		916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
		918	munmap (cctx->sptr, cctx->ssize);
		919	else
		920	#endif
		921	Safefree (cctx->sptr);
		922
		923	Safefree (cctx);
		924	}
		925
		926	static coro_cctx *
		927	cctx_get (pTHX)
		928	{
		929	while (cctx_first)
		930	{
		931	coro_cctx *cctx = cctx_first;
		932	cctx_first = cctx->next;
		933	--cctx_idle;
		934
		935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		936	return cctx;
		937
		938	cctx_destroy (cctx);
		939	}
		940
		941	return cctx_new ();
		942	}
		943
		944	static void
		945	cctx_put (coro_cctx *cctx)
		946	{
		947	/* free another cctx if overlimit */
		948	if (cctx_idle >= MAX_IDLE_CCTX)
		949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
		953
		954	cctx_destroy (first);
		955	}
		956
		957	++cctx_idle;
		958	cctx->next = cctx_first;
		959	cctx_first = cctx;
		960	}
		961
		962	/** coroutine switching *****************************************************/
		963
		964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
678	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
679	{	986	{
680	dSTACKLEVEL;	987	dSTACKLEVEL;
681		988
		989	/* sometimes transfer is only called to set idle_sp */
		990	if (!next)
		991	{
		992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		994	}
682	if (prev != next)	995	else if (prev != next)
683	{	996	{
684	/* has this coro been created yet? */	997	coro_cctx *prev__cctx;
685	if (next->mainstack)	998
		999	if (prev->flags & CF_NEW)
686	{	1000	{
687	LOCK;	1001	/* create a new empty context */
688	SAVE (prev, flags);	1002	Newz (0, prev->cctx, 1, coro_cctx);
689	LOAD (next);	1003	prev->flags &= ~CF_NEW;
690	UNLOCK;	1004	prev->flags |= CF_RUNNING;
691
692	/* mark this state as in-use */
693	next->mainstack = 0;
694	next->tmps_ix = -2;
695
696	/* stacklevel changed? if yes, grab the stack for us! */
697	if (flags & TRANSFER_SAVE_CCTXT)
698	{
699	if (!prev->stack)
700	allocate_stack (prev, 0);
701	else if (prev->cursp != stacklevel
702	&& prev->stack->usecnt > 1)
703	{
704	prev->gencnt = ++prev->stack->gencnt;
705	prev->stack->usecnt = 1;
706	}
707
708	/* has our stack been invalidated? */
709	if (next->stack && next->stack->gencnt != next->gencnt)
710	{
711	deallocate_stack (next);
712	allocate_stack (next, 1);
713	coro_create (&(next->stack->cctx),
714	continue_coro, (void *)next,
715	next->stack->sptr, labs (next->stack->ssize));
716	}
717
718	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
719	prev->cursp = stacklevel;
720	/* don't add any code here */
721	}
722	else
723	next->cursp = stacklevel;
724	}	1005	}
725	else if (next->tmps_ix == -2)	1006
726	croak ("tried to transfer to running coroutine");	1007	prev->flags &= ~CF_RUNNING;
		1008	next->flags |= CF_RUNNING;
		1009
		1010	LOCK;
		1011
		1012	if (next->flags & CF_NEW)
		1013	{
		1014	/* need to start coroutine */
		1015	next->flags &= ~CF_NEW;
		1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
		1020	}
727	else	1021	else
728	{	1022	{
729	LOCK;	1023	/* coroutine already started */
730	SAVE (prev, -1); /* first get rid of the old state */	1024	save_perl (aTHX_ prev);
731	UNLOCK;	1025	load_perl (aTHX_ next);
732
733	/* create the coroutine for the first time */
734	if (flags & TRANSFER_SAVE_CCTXT)
735	{
736	if (!prev->stack)
737	allocate_stack (prev, 0);
738
739	/* the new coroutine starts with start_env again */
740	PL_top_env = &PL_start_env;
741
742	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743	{
744	setup_coro (next);
745	next->cursp = stacklevel;
746
747	prev->stack->refcnt++;
748	prev->stack->usecnt++;
749	next->stack = prev->stack;
750	next->gencnt = prev->gencnt;
751	}
752	else
753	{
754	assert (!next->stack);
755	allocate_stack (next, 1);
756	coro_create (&(next->stack->cctx),
757	setup_coro, (void *)next,
758	next->stack->sptr, labs (next->stack->ssize));
759	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760	prev->cursp = stacklevel;
761	/* don't add any code here */
762	}
763	}
764	else
765	{
766	setup_coro (next);
767	next->cursp = stacklevel;
768	}
769	}	1026	}
770	}
771		1027
772	LOCK;	1028	prev__cctx = prev->cctx;
773	if (coro_mortal)	1029
774	{	1030	/* possibly "free" the cctx */
775	SvREFCNT_dec (coro_mortal);	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
776	coro_mortal = 0;	1032	{
777	}	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1035
		1036	prev->cctx = 0;
		1037
		1038	cctx_put (prev__cctx);
		1039	}
		1040
		1041	++next->usecount;
		1042
		1043	if (!next->cctx)
		1044	next->cctx = cctx_get (aTHX);
		1045
		1046	if (prev__cctx != next->cctx)
		1047	{
		1048	prev__cctx->top_env = PL_top_env;
		1049	PL_top_env = next->cctx->top_env;
		1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1051	}
		1052
		1053	free_coro_mortal (aTHX);
778	UNLOCK;	1054	UNLOCK;
		1055	}
779	}	1056	}
780		1057
781	/* use this function pointer to call the above function */	1058	struct transfer_args
782	/* this is done to increase chances of the compiler not inlining the call */	1059	{
783	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1060	struct coro *prev, *next;
		1061	};
784		1062
785	#define SV_CORO(sv,func) \	1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
786	do { \	1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
787	if (SvROK (sv)) \
788	sv = SvRV (sv); \
789	\
790	if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791	{ \
792	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793	\
794	if (!he) \
795	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796	\
797	(sv) = SvRV (HeVAL(he)); \
798	} \
799	\
800	/* must also be changed inside Coro::Cont::yield */ \
801	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803	\
804	} while(0)
805		1065
		1066	/** high level stuff ********************************************************/
		1067
806	static void	1068	static int
807	coro_state_destroy (struct coro *coro)	1069	coro_state_destroy (pTHX_ struct coro *coro)
808	{	1070	{
809	if (coro->refcnt--)	1071	if (coro->flags & CF_DESTROYED)
810	return;	1072	return 0;
		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
		1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
811		1086
812	if (coro->mainstack && coro->mainstack != main_mainstack)	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
813	{	1088	{
814	struct coro temp;	1089	struct coro temp;
815		1090
816	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
817	LOAD (aTHX_ coro);	1095	load_perl (aTHX_ coro);
818		1096
819	destroy_stacks (aTHX);	1097	coro_destroy (aTHX_ coro);
820		1098
821	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
822		1100
823	coro->mainstack = 0;	1101	coro->mainstack = 0;
824	}	1102	}
825		1103
826	deallocate_stack (coro);	1104	cctx_destroy (coro->cctx);
827	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
828	Safefree (coro);	1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
829	}	1112	}
830		1113
831	static int	1114	static int
832	coro_state_clear (SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833	{	1116	{
834	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
835	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
836		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
837	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
838		1127
839	return 0;	1128	return 0;
840	}	1129	}
841		1130
842	static int	1131	static int
843	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1132	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844	{	1133	{
845	struct coro *coro = (struct coro *)mg->mg_ptr;	1134	struct coro *coro = (struct coro *)mg->mg_ptr;
846		1135
847	++coro->refcnt;	1136	++coro->refcnt;
848		1137
849	return 0;	1138	return 0;
850	}	1139	}
851		1140
852	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1141	static MGVTBL coro_state_vtbl = {
		1142	0, 0, 0, 0,
		1143	coro_state_free,
		1144	0,
		1145	#ifdef MGf_DUP
		1146	coro_state_dup,
		1147	#else
		1148	# define MGf_DUP 0
		1149	#endif
		1150	};
853		1151
854	static struct coro *
855	SvSTATE (SV *coro)
856	{
857	MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro);
858	assert (mg->mg_type == PERL_MAGIC_ext);
859	return (struct coro *)mg->mg_ptr;
860	}
861
862	static void	1152	static void
		1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1154	{
		1155	ta->prev = SvSTATE (prev_sv);
		1156	ta->next = SvSTATE (next_sv);
		1157	TRANSFER_CHECK (*ta);
		1158	}
		1159
		1160	static void
863	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
864	{	1162	{
865	SV_CORO (prev, "Coro::transfer");	1163	dTHX;
866	SV_CORO (next, "Coro::transfer");	1164	struct transfer_args ta;
867		1165
868	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
869	}	1168	}
870		1169
871	/** Coro ********************************************************************/	1170	/** Coro ********************************************************************/
872		1171
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1172	static void
886	coro_enq (pTHX_ SV *sv)	1173	coro_enq (pTHX_ SV *coro_sv)
887	{	1174	{
888	int prio;
889
890	if (SvTYPE (sv) != SVt_PVHV)
891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893	{
894	SV *coro = sv;
895	SV_CORO (coro, "omg");
896	prio = SvSTATE (coro)->prio;
897	}
898
899	av_push (coro_ready [prio - PRIO_MIN], sv);	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
900	coro_nready++;
901	}	1176	}
902		1177
903	static SV *	1178	static SV *
904	coro_deq (pTHX_ int min_prio)	1179	coro_deq (pTHX_ int min_prio)
905	{	1180	{
…		…
909	if (min_prio < 0)	1184	if (min_prio < 0)
910	min_prio = 0;	1185	min_prio = 0;
911		1186
912	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
913	if (AvFILLp (coro_ready [prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
914	{
915	coro_nready--;
916	return av_shift (coro_ready [prio]);	1189	return av_shift (coro_ready [prio]);
917	}
918		1190
919	return 0;	1191	return 0;
920	}	1192	}
921		1193
922	static void	1194	static int
923	api_ready (SV *coro)	1195	api_ready (SV *coro_sv)
924	{	1196	{
925	dTHX;	1197	dTHX;
		1198	struct coro *coro;
926		1199
927	if (SvROK (coro))	1200	if (SvROK (coro_sv))
928	coro = SvRV (coro);	1201	coro_sv = SvRV (coro_sv);
		1202
		1203	coro = SvSTATE (coro_sv);
		1204
		1205	if (coro->flags & CF_READY)
		1206	return 0;
		1207
		1208	coro->flags |= CF_READY;
929		1209
930	LOCK;	1210	LOCK;
931	coro_enq (aTHX_ SvREFCNT_inc (coro));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
932	UNLOCK;	1213	UNLOCK;
		1214
		1215	return 1;
		1216	}
		1217
		1218	static int
		1219	api_is_ready (SV *coro_sv)
		1220	{
		1221	dTHX;
		1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1223	}
		1224
		1225	static void
		1226	prepare_schedule (pTHX_ struct transfer_args *ta)
		1227	{
		1228	SV *prev_sv, *next_sv;
		1229
		1230	for (;;)
		1231	{
		1232	LOCK;
		1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
		1265	UNLOCK;
		1266	break;
		1267	}
		1268
		1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
		1277	LOCK;
		1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
		1280	UNLOCK;
		1281	}
		1282
		1283	static void
		1284	prepare_cede (pTHX_ struct transfer_args *ta)
		1285	{
		1286	api_ready (coro_current);
		1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
933	}	1302	}
934		1303
935	static void	1304	static void
936	api_schedule (void)	1305	api_schedule (void)
937	{	1306	{
938	dTHX;	1307	dTHX;
		1308	struct transfer_args ta;
939		1309
940	SV *prev, *next;	1310	prepare_schedule (aTHX_ &ta);
941		1311	TRANSFER (ta);
942	LOCK;
943
944	prev = SvRV (GvSV (coro_current));
945	next = coro_deq (aTHX_ PRIO_MIN);
946
947	if (!next)
948	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
949
950	/* free this only after the transfer */
951	coro_mortal = prev;
952	SV_CORO (prev, "Coro::schedule");
953
954	SvRV (GvSV (coro_current)) = next;
955
956	SV_CORO (next, "Coro::schedule");
957
958	UNLOCK;
959
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962	}	1312	}
963		1313
964	static void	1314	static int
965	api_cede (void)	1315	api_cede (void)
966	{	1316	{
967	dTHX;	1317	dTHX;
		1318	struct transfer_args ta;
968		1319
969	LOCK;	1320	prepare_cede (aTHX_ &ta);
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
971	UNLOCK;
972		1321
973	api_schedule ();	1322	if (ta.prev != ta.next)
		1323	{
		1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
974	}	1329	}
975		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
976	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977		1373
978	PROTOTYPES: DISABLE	1374	PROTOTYPES: DISABLE
979		1375
980	BOOT:	1376	BOOT:
981	{ /* {} necessary for stoopid perl-5.6.x */	1377	{
982	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
983	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
984	#endif	1380	#endif
985	BOOT_PAGESIZE;	1381	BOOT_PAGESIZE;
986		1382
987	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1383	irsgv = gv_fetchpv ("/", 1, SVt_PV);
988	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1384
989	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1385	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990		1386
991	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1387	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995		1391
996	main_mainstack = PL_mainstack;	1392	main_mainstack = PL_mainstack;
		1393	main_top_env = PL_top_env;
		1394
		1395	while (main_top_env->je_prev)
		1396	main_top_env = main_top_env->je_prev;
997		1397
998	coroapi.ver = CORO_API_VERSION;	1398	coroapi.ver = CORO_API_VERSION;
999	coroapi.transfer = api_transfer;	1399	coroapi.transfer = api_transfer;
1000		1400
1001	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1401	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1008	struct coro *coro;	1408	struct coro *coro;
1009	HV *hv;	1409	HV *hv;
1010	int i;	1410	int i;
1011		1411
1012	Newz (0, coro, 1, struct coro);	1412	Newz (0, coro, 1, struct coro);
1013	coro->args = newAV ();	1413	coro->args = newAV ();
		1414	coro->flags = CF_NEW;
		1415
		1416	if (coro_first) coro_first->prev = coro;
		1417	coro->next = coro_first;
		1418	coro_first = coro;
		1419
		1420	coro->hv = hv = newHV ();
		1421	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1422	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1014		1423
1015	for (i = 1; i < items; i++)	1424	for (i = 1; i < items; i++)
1016	av_push (coro->args, newSVsv (ST (i)));	1425	av_push (coro->args, newSVsv (ST (i)));
1017
1018	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1019	/*coro->stack = 0;*/
1020
1021	hv = newHV ();
1022	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1023	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1024	}	1426	}
1025	OUTPUT:	1427	OUTPUT:
1026	RETVAL	1428	RETVAL
1027		1429
		1430	# these not obviously related functions are all rolled into the same xs
		1431	# function to increase chances that they all will call transfer with the same
		1432	# stack offset
1028	void	1433	void
1029	transfer(prev, next, flags)	1434	_set_stacklevel (...)
1030	SV *prev	1435	ALIAS:
1031	SV *next	1436	Coro::State::transfer = 1
1032	int flags	1437	Coro::schedule = 2
		1438	Coro::cede = 3
		1439	Coro::cede_notself = 4
1033	CODE:	1440	CODE:
1034	PUTBACK;
1035	SV_CORO (next, "Coro::transfer");
1036	SV_CORO (prev, "Coro::transfer");
1037	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1038	SPAGAIN;
1039
1040	int
1041	prio (Coro::State coro, int newprio = 0)
1042	ALIAS:
1043	nice = 1
1044	CODE:
1045	{	1441	{
1046	RETVAL = coro->prio;	1442	struct transfer_args ta;
1047		1443
1048	if (items > 1)	1444	switch (ix)
1049	{	1445	{
		1446	case 0:
		1447	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1448	ta.next = 0;
		1449	break;
		1450
		1451	case 1:
1050	if (ix)	1452	if (items != 2)
1051	newprio += coro->prio;	1453	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1052		1454
1053	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1455	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1054	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1456	break;
1055		1457
1056	coro->prio = newprio;	1458	case 2:
		1459	prepare_schedule (aTHX_ &ta);
		1460	break;
		1461
		1462	case 3:
		1463	prepare_cede (aTHX_ &ta);
		1464	break;
		1465
		1466	case 4:
		1467	if (!prepare_cede_notself (aTHX_ &ta))
		1468	XSRETURN_EMPTY;
		1469
		1470	break;
1057	}	1471	}
1058	}
1059		1472
1060	void	1473	BARRIER;
1061	_clone_state_from (SV *dst, SV *src)	1474	TRANSFER (ta);
		1475
		1476	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1477	XSRETURN_YES;
		1478	}
		1479
		1480	bool
		1481	_destroy (SV *coro_sv)
1062	CODE:	1482	CODE:
1063	{	1483	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1064	struct coro *coro_src = SvSTATE (src);	1484	OUTPUT:
1065		1485	RETVAL
1066	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068	++coro_src->refcnt;
1069	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070	}
1071		1486
1072	void	1487	void
1073	_exit (code)	1488	_exit (code)
1074	int code	1489	int code
1075	PROTOTYPE: $	1490	PROTOTYPE: $
1076	CODE:	1491	CODE:
1077	_exit (code);	1492	_exit (code);
1078		1493
1079	MODULE = Coro::State PACKAGE = Coro::Cont	1494	int
		1495	cctx_stacksize (int new_stacksize = 0)
		1496	CODE:
		1497	RETVAL = coro_stacksize;
		1498	if (new_stacksize)
		1499	coro_stacksize = new_stacksize;
		1500	OUTPUT:
		1501	RETVAL
		1502
		1503	int
		1504	cctx_count ()
		1505	CODE:
		1506	RETVAL = cctx_count;
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	cctx_idle ()
		1512	CODE:
		1513	RETVAL = cctx_idle;
		1514	OUTPUT:
		1515	RETVAL
1080		1516
1081	void	1517	void
1082	yield (...)	1518	list ()
1083	PROTOTYPE: @	1519	PPCODE:
		1520	{
		1521	struct coro *coro;
		1522	for (coro = coro_first; coro; coro = coro->next)
		1523	if (coro->hv)
		1524	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1525	}
		1526
		1527	void
		1528	call (Coro::State coro, SV *coderef)
		1529	ALIAS:
		1530	eval = 1
		1531	CODE:
		1532	{
		1533	if (coro->mainstack)
		1534	{
		1535	struct coro temp;
		1536	Zero (&temp, 1, struct coro);
		1537
		1538	if (!(coro->flags & CF_RUNNING))
		1539	{
		1540	save_perl (aTHX_ &temp);
		1541	load_perl (aTHX_ coro);
		1542	}
		1543
		1544	{
		1545	dSP;
		1546	ENTER;
		1547	SAVETMPS;
		1548	PUSHMARK (SP);
		1549	PUTBACK;
		1550	if (ix)
		1551	eval_sv (coderef, 0);
		1552	else
		1553	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1554	SPAGAIN;
		1555	FREETMPS;
		1556	LEAVE;
		1557	PUTBACK;
		1558	}
		1559
		1560	if (!(coro->flags & CF_RUNNING))
		1561	{
		1562	save_perl (aTHX_ coro);
		1563	load_perl (aTHX_ &temp);
		1564	}
		1565	}
		1566	}
		1567
		1568	SV *
		1569	is_ready (Coro::State coro)
		1570	PROTOTYPE: $
		1571	ALIAS:
		1572	is_ready = CF_READY
		1573	is_running = CF_RUNNING
		1574	is_new = CF_NEW
		1575	is_destroyed = CF_DESTROYED
		1576	CODE:
		1577	RETVAL = boolSV (coro->flags & ix);
		1578	OUTPUT:
		1579	RETVAL
		1580
		1581	void
		1582	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1583
		1584	SV *
		1585	has_stack (Coro::State coro)
		1586	PROTOTYPE: $
		1587	CODE:
		1588	RETVAL = boolSV (!!coro->cctx);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	int
		1593	is_traced (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	IV
		1601	rss (Coro::State coro)
		1602	PROTOTYPE: $
		1603	ALIAS:
		1604	usecount = 1
1084	CODE:	1605	CODE:
1085	SV *yieldstack;	1606	switch (ix)
1086	SV *sv;	1607	{
1087	AV *defav = GvAV (PL_defgv);	1608	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1088	struct coro *prev, *next;	1609	case 1: RETVAL = coro->usecount; break;
1089
1090	yieldstack = *hv_fetch (
1091	(HV *)SvRV (GvSV (coro_current)),
1092	"yieldstack", sizeof ("yieldstack") - 1,
1093	0	1610	}
1094	);	1611	OUTPUT:
		1612	RETVAL
1095		1613
1096	/* set up @_ -- ugly */
1097	av_clear (defav);
1098	av_fill (defav, items - 1);
1099	while (items--)
1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102	sv = av_pop ((AV *)SvRV (yieldstack));
1103	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105	SvREFCNT_dec (sv);
1106
1107	coro_state_transfer (aTHX_ prev, next, 0);
1108		1614
1109	MODULE = Coro::State PACKAGE = Coro	1615	MODULE = Coro::State PACKAGE = Coro
1110		1616
1111	BOOT:	1617	BOOT:
1112	{	1618	{
1113	int i;	1619	int i;
		1620
		1621	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1622	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1623	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1624
		1625	coro_current = get_sv ("Coro::current", FALSE);
		1626	SvREADONLY_on (coro_current);
		1627
1114	HV *stash = gv_stashpv ("Coro", TRUE);	1628	coro_stash = gv_stashpv ("Coro", TRUE);
1115		1629
1116	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1630	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1631	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1632	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1633	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1634	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1635	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125		1636
1126	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1637	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127	coro_ready[i] = newAV ();	1638	coro_ready[i] = newAV ();
1128		1639
1129	{	1640	{
1130	SV *sv = perl_get_sv("Coro::API", 1);	1641	SV *sv = perl_get_sv("Coro::API", 1);
1131		1642
1132	coroapi.schedule = api_schedule;	1643	coroapi.schedule = api_schedule;
1133	coroapi.cede = api_cede;	1644	coroapi.cede = api_cede;
		1645	coroapi.cede_notself = api_cede_notself;
1134	coroapi.ready = api_ready;	1646	coroapi.ready = api_ready;
		1647	coroapi.is_ready = api_is_ready;
1135	coroapi.nready = &coro_nready;	1648	coroapi.nready = &coro_nready;
1136	coroapi.current = coro_current;	1649	coroapi.current = coro_current;
1137		1650
1138	GCoroAPI = &coroapi;	1651	GCoroAPI = &coroapi;
1139	sv_setiv (sv, (IV)&coroapi);	1652	sv_setiv (sv, (IV)&coroapi);
1140	SvREADONLY_on (sv);	1653	SvREADONLY_on (sv);
1141	}	1654	}
1142	}	1655	}
1143		1656
1144	#if !PERL_MICRO
1145
1146	void	1657	void
1147	ready (self)	1658	_set_current (SV *current)
1148	SV * self
1149	PROTOTYPE: $	1659	PROTOTYPE: $
1150	CODE:	1660	CODE:
1151	api_ready (self);	1661	SvREFCNT_dec (SvRV (coro_current));
		1662	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1152		1663
1153	#endif	1664	int
		1665	prio (Coro::State coro, int newprio = 0)
		1666	ALIAS:
		1667	nice = 1
		1668	CODE:
		1669	{
		1670	RETVAL = coro->prio;
		1671
		1672	if (items > 1)
		1673	{
		1674	if (ix)
		1675	newprio = coro->prio - newprio;
		1676
		1677	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1678	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1679
		1680	coro->prio = newprio;
		1681	}
		1682	}
		1683	OUTPUT:
		1684	RETVAL
		1685
		1686	SV *
		1687	ready (SV *self)
		1688	PROTOTYPE: $
		1689	CODE:
		1690	RETVAL = boolSV (api_ready (self));
		1691	OUTPUT:
		1692	RETVAL
1154		1693
1155	int	1694	int
1156	nready (...)	1695	nready (...)
1157	PROTOTYPE:	1696	PROTOTYPE:
1158	CODE:	1697	CODE:
1159	RETVAL = coro_nready;	1698	RETVAL = coro_nready;
1160	OUTPUT:	1699	OUTPUT:
1161	RETVAL	1700	RETVAL
1162		1701
		1702	# for async_pool speedup
1163	void	1703	void
1164	schedule (...)	1704	_pool_1 (SV *cb)
1165	PROTOTYPE:
1166	CODE:	1705	CODE:
1167	api_schedule ();	1706	{
		1707	struct coro *coro = SvSTATE (coro_current);
		1708	HV *hv = (HV *)SvRV (coro_current);
		1709	AV *defav = GvAV (PL_defgv);
		1710	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1711	AV *invoke_av;
		1712	int i, len;
		1713
		1714	if (!invoke)
		1715	croak ("\3terminate\2\n");
		1716
		1717	SvREFCNT_dec (coro->saved_deffh);
		1718	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
1168		1737
1169	void	1738	void
1170	cede (...)	1739	_pool_2 (SV *cb)
1171	PROTOTYPE:
1172	CODE:	1740	CODE:
1173	api_cede ();	1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
1174		1743
1175	# and these are hacks	1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1747	coro->saved_deffh = 0;
		1748
		1749	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1750	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1751	croak ("\3terminate\2\n");
		1752
		1753	av_clear (GvAV (PL_defgv));
		1754	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1755	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1756
		1757	coro->prio = 0;
		1758
		1759	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1760	api_trace (coro_current, 0);
		1761
		1762	av_push (av_async_pool, newSVsv (coro_current));
		1763	}
		1764
		1765
		1766	MODULE = Coro::State PACKAGE = Coro::AIO
		1767
1176	SV *	1768	SV *
1177	_aio_get_state ()	1769	_get_state ()
1178	CODE:	1770	CODE:
1179	{	1771	{
1180	struct {	1772	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		1773
		1774	RETVAL = newSV (sizeof (struct io_state));
		1775	data = (struct io_state *)SvPVX (RETVAL);
		1776	SvCUR_set (RETVAL, sizeof (struct io_state));
		1777	SvPOK_only (RETVAL);
		1778
1187	data.errorno = errno;	1779	data->errorno = errno;
1188	data.laststype = PL_laststype;	1780	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	1781	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	1782	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	1783	}
1194	OUTPUT:	1784	OUTPUT:
1195	RETVAL	1785	RETVAL
1196		1786
1197	void	1787	void
1198	_aio_set_state (char *data_)	1788	_set_state (char *data_)
1199	PROTOTYPE: $	1789	PROTOTYPE: $
1200	CODE:	1790	CODE:
1201	{	1791	{
1202	struct {	1792	struct io_state *data = (void *)data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} *data = (void *)data_;
1208		1793
1209	errno = data->errorno;	1794	errno = data->errorno;
1210	PL_laststype = data->laststype;	1795	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	1796	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	1797	PL_statcache = data->statcache;
1213	}	1798	}
		1799

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