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Comparing Coro/Coro/State.xs (file contents):
Revision 1.86 by root, Fri Nov 24 11:36:57 2006 UTC vs.
Revision 1.176 by root, Sun Sep 30 13:50:38 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	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
93	typedef struct {	155	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	156	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		157
		158	/* the stack */
		159	void *sptr;
		160	size_t ssize;
		161
		162	/* cpu state */
		163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
98	coro_context cctx;	166	coro_context cctx;
99		167
100	void *sptr;	168	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	169	int valgrind_id;
102	} coro_stack;	170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
103		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
104	struct coro {	182	struct coro {
105	/* the optional C context */	183	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	184	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		185
150	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
151	AV *args;	187	AV *args;
		188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV *defav; /* @_ */
		194	SV *defsv; /* $_ */
		195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
		207	/* coro process data */
		208	int prio;
		209
		210	/* linked list */
		211	struct coro *next, *prev;
		212	HV *hv; /* the perl hash associated with this coro, if any */
152	};	213	};
153		214
154	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
156		217
		218	/** Coro ********************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/** lowlevel stuff **********************************************************/
		234
157	static AV *	235	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
159	{	237	{
160	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	239	AV *newpadlist, *newpad;
162		240
163	newpadlist = newAV ();	241	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	242	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	243	#if PERL_VERSION_ATLEAST (5,9,0)
		244	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		245	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	246	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	247	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	248	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	249	--AvFILLp (padlist);
172		250
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	251	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
217		295
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	296	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		297
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	298	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		299
		300	#define CORO_MAGIC(cv) \
		301	SvMAGIC (cv) \
		302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		303	? SvMAGIC (cv) \
		304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		305	: 0
		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
222	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
223	static void	334	static void
224	get_padlist (pTHX_ CV *cv)	335	get_padlist (pTHX_ CV *cv)
225	{	336	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	337	MAGIC *mg = CORO_MAGIC (cv);
		338	AV *av;
227		339
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	342	else
231	{	343	{
232	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	345	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	346	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
238	#else	350	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	354	}
243		355
244	static void	356	static void
245	put_padlist (pTHX_ CV *cv)	357	put_padlist (pTHX_ CV *cv)
246	{	358	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	359	MAGIC *mg = CORO_MAGIC (cv);
		360	AV *av;
248		361
249	if (!mg)	362	if (!mg)
250	{	363	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	364	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	365	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	366	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	367	mg->mg_obj = (SV *)newAV ();
255	}	368	}
256		369
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	370	av = (AV *)mg->mg_obj;
		371
		372	if (AvFILLp (av) >= AvMAX (av))
		373	av_extend (av, AvMAX (av) + 1);
		374
		375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
258	}	376	}
		377
		378	/** load & save, init *******************************************************/
259		379
260	#define SB do {	380	#define SB do {
261	#define SE } while (0)	381	#define SE } while (0)
262		382
263	#define LOAD(state) load_state(aTHX_ (state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
265
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
267		384
268	static void	385	static void
269	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
270	{	387	{
271	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	389	# include "state.h"
273		390	#undef VAR
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		391
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
309		411
310	{	412	{
311	dSP;	413	dSP;
312	CV *cv;	414	CV *cv;
313		415
314	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
316	{	418	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	420	CvDEPTH (cv) = PTR2IV (POPs);
323	}	421	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	422	}
327		423
328	PUTBACK;	424	PUTBACK;
329	}	425	}
330	}	426	}
331		427
332	static void	428	static void
333	save_state(pTHX_ Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
334	{	430	{
335	{	431	{
336	dSP;	432	dSP;
337	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	437	/*
342	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
344	*/	440	*/
345		441
346	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
348	for (;;)	444	for (;;)
349	{	445	{
350	while (cxix >= 0)	446	while (cxix >= 0)
351	{	447	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
353		449
354	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
355	{	451	{
356	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
		453
357	if (CvDEPTH(cv))	454	if (CvDEPTH (cv))
358	{	455	{
359	EXTEND (SP, CvDEPTH(cv)*2);	456	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	457	PUSHs ((SV *)CvPADLIST (cv));
		458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
370		460
		461	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	462	get_padlist (aTHX_ cv);
372	}	463	}
373	}	464	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	465	}
383		466
384	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
385	break;	468	break;
386		469
387	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
390	}	473	}
391		474
392	PUTBACK;	475	PUTBACK;
393	}	476	}
394		477
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
398		483
399	c->dowarn = PL_dowarn;	484	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	485	# include "state.h"
401		486	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	487	}
434		488
435	/*	489	/*
436	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
440	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
441	static void	498	static void
442	coro_init_stacks (pTHX)	499	coro_init_stacks (pTHX)
443	{	500	{
444	LOCK;	501	PL_curstackinfo = new_stackinfo(64, 6);
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		505
451	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		509
455	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
456	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	513	PL_tmps_max = 64;
459		514
460	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
463		518
…		…
467		522
468	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
469	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
471		526
472	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	529	PL_savestack_max = 64;
475		530
476	#if PERL_VERSION < 9	531	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	534	PL_retstack_max = 4;
480	#endif	535	#endif
481
482	UNLOCK;
483	}	536	}
		537	#endif
484		538
485	/*	539	/*
486	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
487	*/	541	*/
488	static void	542	static void
489	destroy_stacks(pTHX)	543	coro_destroy_stacks (pTHX)
490	{	544	{
491	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
492	{	546	{
493	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
495		550
496	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
497	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
498		554
		555	/* unwind all extra stacks */
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
500	}	560	}
501		561
502	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
504		564
505	while (PL_curstackinfo)	565	while (PL_curstackinfo)
506	{	566	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
508		568
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		571
521	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	574	PL_curstackinfo = p;
524	}	575	}
525		576
526	Safefree (PL_tmps_stack);	577	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	578	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	579	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	580	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	581	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	582	Safefree (PL_retstack);
532	#endif	583	#endif
533	}	584	}
534		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/** coroutine stack handling ************************************************/
		618
535	static void	619	static void
536	allocate_stack (Coro__State ctx, int alloc)	620	setup_coro (pTHX_ struct coro *coro)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566
567	ctx->stack = stack;
568	}
569
570	static void
571	deallocate_stack (Coro__State ctx)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	621	{
598	/*	622	/*
599	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
600	*/	624	*/
		625	coro_init_stacks (aTHX);
		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
		631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
		635
		636	{
		637	dSP;
		638	LOGOP myop;
		639
		640	SvREFCNT_dec (GvAV (PL_defgv));
		641	GvAV (PL_defgv) = coro->args; coro->args = 0;
		642
		643	Zero (&myop, 1, LOGOP);
		644	myop.op_next = Nullop;
		645	myop.op_flags = OPf_WANT_VOID;
		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
		650	PL_op = (OP *)&myop;
		651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		652	SPAGAIN;
		653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
		656	}
		657
		658	static void
		659	free_coro_mortal (pTHX)
		660	{
		661	if (coro_mortal)
		662	{
		663	SvREFCNT_dec (coro_mortal);
		664	coro_mortal = 0;
		665	}
		666	}
		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV **bot, **top;
		686	AV *av = newAV (); /* return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
		794	static void NOINLINE
		795	prepare_cctx (pTHX_ coro_cctx *cctx)
		796	{
		797	dSP;
		798	LOGOP myop;
		799
		800	PL_top_env = &PL_start_env;
		801
		802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
		804
		805	Zero (&myop, 1, LOGOP);
		806	myop.op_next = PL_op;
		807	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		808
		809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		813	PUTBACK;
		814	PL_op = (OP *)&myop;
		815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		816	SPAGAIN;
		817	}
		818
		819	/*
		820	* this is a _very_ stripped down perl interpreter ;)
		821	*/
		822	static void
		823	coro_run (void *arg)
		824	{
601	dTHX;	825	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		826
606	coro_init_stacks (aTHX);	827	/* coro_run is the alternative tail of transfer(), so unlock here. */
607	/*PL_curcop = 0;*/	828	UNLOCK;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */
609	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
611		829
612	SPAGAIN;	830	/* we now skip the entersub that lead to transfer() */
		831	PL_op = PL_op->op_next;
613		832
614	if (ctx->stack)	833	/* inject a fake subroutine call to cctx_init */
615	{	834	prepare_cctx (aTHX_ (coro_cctx *)arg);
616	ctx->cursp = 0;
617		835
618	PUSHMARK(SP);	836	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PUTBACK;	837	PL_restartop = PL_op;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	838	perl_run (PL_curinterp);
621		839
622	if (SvTRUE (ERRSV))	840	/*
623	croak (NULL);	841	* If perl-run returns we assume exit() was being called or the coro
624	else	842	* fell off the end, which seems to be the only valid (non-bug)
625	croak ("FATAL: CCTXT coroutine returned!");	843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
		846	*/
		847	PL_top_env = main_top_env;
		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		849	}
		850
		851	static coro_cctx *
		852	cctx_new ()
		853	{
		854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
		857
		858	++cctx_count;
		859
		860	Newz (0, cctx, 1, coro_cctx);
		861
		862	#if HAVE_MMAP
		863
		864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		865	/* mmap supposedly does allocate-on-write for us */
		866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		867
		868	if (cctx->sptr != (void *)-1)
		869	{
		870	# if CORO_STACKGUARD
		871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags |= CC_MAPPED;
626	}	876	}
627	else	877	else
628	{	878	#endif
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}	879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
		882
		883	if (!cctx->sptr)
		884	{
		885	perror ("FATAL: unable to allocate stack for coroutine");
		886	_exit (EXIT_FAILURE);
		887	}
		888
		889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
		892
		893	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		895
		896	return cctx;
652	}	897	}
653		898
654	static void	899	static void
655	continue_coro (void *arg)	900	cctx_destroy (coro_cctx *cctx)
656	{	901	{
657	/*	902	if (!cctx)
658	* this is a _very_ stripped down perl interpreter ;)	903	return;
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662		904
663	PL_top_env = &PL_start_env;	905	--cctx_count;
664		906
665	ctx->cursp = 0;	907	#if CORO_USE_VALGRIND
666	PL_op = PL_op->op_next;	908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
667	CALLRUNOPS(aTHX);	909	#endif
668		910
669	abort ();	911	#if HAVE_MMAP
670	}	912	if (cctx->flags & CC_MAPPED)
		913	munmap (cctx->sptr, cctx->ssize);
		914	else
		915	#endif
		916	Safefree (cctx->sptr);
671		917
672	/* never call directly, always through the coro_state_transfer global variable */	918	Safefree (cctx);
		919	}
		920
		921	static coro_cctx *
		922	cctx_get (pTHX)
		923	{
		924	while (cctx_first)
		925	{
		926	coro_cctx *cctx = cctx_first;
		927	cctx_first = cctx->next;
		928	--cctx_idle;
		929
		930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		931	return cctx;
		932
		933	cctx_destroy (cctx);
		934	}
		935
		936	return cctx_new ();
		937	}
		938
673	static void	939	static void
		940	cctx_put (coro_cctx *cctx)
		941	{
		942	/* free another cctx if overlimit */
		943	if (cctx_idle >= MAX_IDLE_CCTX)
		944	{
		945	coro_cctx *first = cctx_first;
		946	cctx_first = first->next;
		947	--cctx_idle;
		948
		949	cctx_destroy (first);
		950	}
		951
		952	++cctx_idle;
		953	cctx->next = cctx_first;
		954	cctx_first = cctx;
		955	}
		956
		957	/** coroutine switching *****************************************************/
		958
		959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
674	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	980	transfer (pTHX_ struct coro *prev, struct coro *next)
675	{	981	{
676	dSTACKLEVEL;	982	dSTACKLEVEL;
677		983
		984	/* sometimes transfer is only called to set idle_sp */
		985	if (!next)
		986	{
		987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		989	}
678	if (prev != next)	990	else if (prev != next)
679	{	991	{
680	/* has this coro been created yet? */	992	coro_cctx *prev__cctx;
681	if (next->mainstack)	993
		994	if (prev->flags & CF_NEW)
682	{	995	{
683	LOCK;	996	/* create a new empty context */
684	SAVE (prev, flags);	997	Newz (0, prev->cctx, 1, coro_cctx);
685	LOAD (next);	998	prev->flags &= ~CF_NEW;
686	UNLOCK;	999	prev->flags |= CF_RUNNING;
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	prev->cursp = stacklevel;
716	/* don't add any code here */
717	}
718	else
719	next->cursp = stacklevel;
720	}	1000	}
721	else if (next->tmps_ix == -2)	1001
722	croak ("tried to transfer to running coroutine");	1002	prev->flags &= ~CF_RUNNING;
		1003	next->flags |= CF_RUNNING;
		1004
		1005	LOCK;
		1006
		1007	if (next->flags & CF_NEW)
		1008	{
		1009	/* need to start coroutine */
		1010	next->flags &= ~CF_NEW;
		1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
		1015	}
723	else	1016	else
724	{	1017	{
725	LOCK;	1018	/* coroutine already started */
726	SAVE (prev, -1); /* first get rid of the old state */	1019	save_perl (aTHX_ prev);
727	UNLOCK;	1020	load_perl (aTHX_ next);
728
729	/* create the coroutine for the first time */
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	/* the new coroutine starts with start_env again */
736	PL_top_env = &PL_start_env;
737
738	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739	{
740	setup_coro (next);
741	next->cursp = stacklevel;
742
743	prev->stack->refcnt++;
744	prev->stack->usecnt++;
745	next->stack = prev->stack;
746	next->gencnt = prev->gencnt;
747	}
748	else
749	{
750	assert (!next->stack);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	setup_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756	prev->cursp = stacklevel;
757	/* don't add any code here */
758	}
759	}
760	else
761	{
762	setup_coro (next);
763	next->cursp = stacklevel;
764	}
765	}	1021	}
766	}
767		1022
768	LOCK;	1023	prev__cctx = prev->cctx;
769	if (coro_mortal)	1024
770	{	1025	/* possibly "free" the cctx */
771	SvREFCNT_dec (coro_mortal);	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
772	coro_mortal = 0;	1027	{
773	}	1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1030
		1031	prev->cctx = 0;
		1032
		1033	cctx_put (prev__cctx);
		1034	}
		1035
		1036	++next->usecount;
		1037
		1038	if (!next->cctx)
		1039	next->cctx = cctx_get (aTHX);
		1040
		1041	if (prev__cctx != next->cctx)
		1042	{
		1043	prev__cctx->top_env = PL_top_env;
		1044	PL_top_env = next->cctx->top_env;
		1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1046	}
		1047
		1048	free_coro_mortal (aTHX);
774	UNLOCK;	1049	UNLOCK;
		1050	}
775	}	1051	}
776		1052
777	/* use this function pointer to call the above function */	1053	struct transfer_args
778	/* this is done to increase chances of the compiler not inlining the call */	1054	{
779	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1055	struct coro *prev, *next;
		1056	};
780		1057
781	#define SV_CORO(sv,func) \	1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
782	do { \	1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
783	if (SvROK (sv)) \
784	sv = SvRV (sv); \
785	\
786	if (SvTYPE (sv) == SVt_PVHV) \
787	{ \
788	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
789	\
790	if (!he) \
791	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792	\
793	(sv) = SvRV (HeVAL(he)); \
794	} \
795	\
796	/* must also be changed inside Coro::Cont::yield */ \
797	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
798	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799	\
800	} while(0)
801		1060
802	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	1061	/** high level stuff ********************************************************/
		1062
		1063	static int
		1064	coro_state_destroy (pTHX_ struct coro *coro)
		1065	{
		1066	if (coro->flags & CF_DESTROYED)
		1067	return 0;
		1068
		1069	coro->flags |= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1081
		1082	if (coro->mainstack && coro->mainstack != main_mainstack)
		1083	{
		1084	struct coro temp;
		1085
		1086	assert (!(coro->flags & CF_RUNNING));
		1087
		1088	Zero (&temp, 1, struct coro);
		1089	temp.save = CORO_SAVE_ALL;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
		1097	coro_destroy_stacks (aTHX);
		1098
		1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1100
		1101	coro->mainstack = 0;
		1102	}
		1103
		1104	cctx_destroy (coro->cctx);
		1105	SvREFCNT_dec (coro->args);
		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;
		1112	}
		1113
		1114	static int
		1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1116	{
		1117	struct coro *coro = (struct coro *)mg->mg_ptr;
		1118	mg->mg_ptr = 0;
		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
		1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
		1127
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1133	{
		1134	struct coro *coro = (struct coro *)mg->mg_ptr;
		1135
		1136	++coro->refcnt;
		1137
		1138	return 0;
		1139	}
		1140
		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	};
803		1151
804	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
805	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
806	{	1162	{
807	SV_CORO (prev, "Coro::transfer");	1163	dTHX;
808	SV_CORO (next, "Coro::transfer");	1164	struct transfer_args ta;
809		1165
810	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
		1168	}
		1169
		1170	static int
		1171	api_save (SV *coro_sv, int new_save)
		1172	{
		1173	dTHX;
		1174	struct coro *coro = SvSTATE (coro_sv);
		1175	int old_save = coro->save;
		1176
		1177	if (new_save >= 0)
		1178	coro->save = new_save;
		1179
		1180	return old_save;
811	}	1181	}
812		1182
813	/** Coro ********************************************************************/	1183	/** Coro ********************************************************************/
814		1184
815	#define PRIO_MAX 3
816	#define PRIO_HIGH 1
817	#define PRIO_NORMAL 0
818	#define PRIO_LOW -1
819	#define PRIO_IDLE -3
820	#define PRIO_MIN -4
821
822	/* for Coro.pm */
823	static GV *coro_current, *coro_idle;
824	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
825	static int coro_nready;
826
827	static void	1185	static void
828	coro_enq (pTHX_ SV *sv)	1186	coro_enq (pTHX_ SV *coro_sv)
829	{	1187	{
830	SV **xprio;
831	int prio;
832
833	if (SvTYPE (sv) != SVt_PVHV)
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");
835
836	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
837	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838
839	prio = prio > PRIO_MAX ? PRIO_MAX
840	: prio < PRIO_MIN ? PRIO_MIN
841	: prio;
842
843	av_push (coro_ready [prio - PRIO_MIN], sv);	1188	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
844	coro_nready++;
845	}	1189	}
846		1190
847	static SV *	1191	static SV *
848	coro_deq (pTHX_ int min_prio)	1192	coro_deq (pTHX_ int min_prio)
849	{	1193	{
…		…
853	if (min_prio < 0)	1197	if (min_prio < 0)
854	min_prio = 0;	1198	min_prio = 0;
855		1199
856	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1200	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
857	if (AvFILLp (coro_ready [prio]) >= 0)	1201	if (AvFILLp (coro_ready [prio]) >= 0)
858	{
859	coro_nready--;
860	return av_shift (coro_ready [prio]);	1202	return av_shift (coro_ready [prio]);
861	}
862		1203
863	return 0;	1204	return 0;
864	}	1205	}
865		1206
		1207	static int
		1208	api_ready (SV *coro_sv)
		1209	{
		1210	dTHX;
		1211	struct coro *coro;
		1212
		1213	if (SvROK (coro_sv))
		1214	coro_sv = SvRV (coro_sv);
		1215
		1216	coro = SvSTATE (coro_sv);
		1217
		1218	if (coro->flags & CF_READY)
		1219	return 0;
		1220
		1221	coro->flags |= CF_READY;
		1222
		1223	LOCK;
		1224	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1225	++coro_nready;
		1226	UNLOCK;
		1227
		1228	return 1;
		1229	}
		1230
		1231	static int
		1232	api_is_ready (SV *coro_sv)
		1233	{
		1234	dTHX;
		1235	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1236	}
		1237
866	static void	1238	static void
867	api_ready (SV *coro)	1239	prepare_schedule (pTHX_ struct transfer_args *ta)
868	{	1240	{
869	dTHX;	1241	SV *prev_sv, *next_sv;
870		1242
871	if (SvROK (coro))	1243	for (;;)
872	coro = SvRV (coro);	1244	{
		1245	LOCK;
		1246	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1247
		1248	/* nothing to schedule: call the idle handler */
		1249	if (!next_sv)
		1250	{
		1251	dSP;
		1252	UNLOCK;
		1253
		1254	ENTER;
		1255	SAVETMPS;
		1256
		1257	PUSHMARK (SP);
		1258	PUTBACK;
		1259	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1260
		1261	FREETMPS;
		1262	LEAVE;
		1263	continue;
		1264	}
		1265
		1266	ta->next = SvSTATE (next_sv);
		1267
		1268	/* cannot transfer to destroyed coros, skip and look for next */
		1269	if (ta->next->flags & CF_DESTROYED)
		1270	{
		1271	UNLOCK;
		1272	SvREFCNT_dec (next_sv);
		1273	/* coro_nready is already taken care of by destroy */
		1274	continue;
		1275	}
		1276
		1277	--coro_nready;
		1278	UNLOCK;
		1279	break;
		1280	}
		1281
		1282	/* free this only after the transfer */
		1283	prev_sv = SvRV (coro_current);
		1284	ta->prev = SvSTATE (prev_sv);
		1285	TRANSFER_CHECK (*ta);
		1286	assert (ta->next->flags & CF_READY);
		1287	ta->next->flags &= ~CF_READY;
		1288	SvRV_set (coro_current, next_sv);
873		1289
874	LOCK;	1290	LOCK;
875	coro_enq (aTHX_ SvREFCNT_inc (coro));	1291	free_coro_mortal (aTHX);
		1292	coro_mortal = prev_sv;
876	UNLOCK;	1293	UNLOCK;
		1294	}
		1295
		1296	static void
		1297	prepare_cede (pTHX_ struct transfer_args *ta)
		1298	{
		1299	api_ready (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	}
		1302
		1303	static int
		1304	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1305	{
		1306	if (coro_nready)
		1307	{
		1308	SV *prev = SvRV (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	api_ready (prev);
		1311	return 1;
		1312	}
		1313	else
		1314	return 0;
877	}	1315	}
878		1316
879	static void	1317	static void
880	api_schedule (void)	1318	api_schedule (void)
881	{	1319	{
882	dTHX;	1320	dTHX;
		1321	struct transfer_args ta;
883		1322
884	SV *prev, *next;	1323	prepare_schedule (aTHX_ &ta);
		1324	TRANSFER (ta);
		1325	}
885		1326
886	LOCK;	1327	static int
		1328	api_cede (void)
		1329	{
		1330	dTHX;
		1331	struct transfer_args ta;
887		1332
888	prev = SvRV (GvSV (coro_current));	1333	prepare_cede (aTHX_ &ta);
889	next = coro_deq (aTHX_ PRIO_MIN);
890		1334
891	if (!next)	1335	if (ta.prev != ta.next)
892	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1336	{
		1337	TRANSFER (ta);
		1338	return 1;
		1339	}
		1340	else
		1341	return 0;
		1342	}
893		1343
894	/* free this only after the transfer */	1344	static int
895	coro_mortal = prev;	1345	api_cede_notself (void)
896	SV_CORO (prev, "Coro::schedule");	1346	{
		1347	dTHX;
		1348	struct transfer_args ta;
897		1349
898	SvRV (GvSV (coro_current)) = next;	1350	if (prepare_cede_notself (aTHX_ &ta))
899		1351	{
900	SV_CORO (next, "Coro::schedule");	1352	TRANSFER (ta);
901		1353	return 1;
902	UNLOCK;	1354	}
903		1355	else
904	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1356	return 0;
905	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
906	}	1357	}
907		1358
908	static void	1359	static void
909	api_cede (void)	1360	api_trace (SV *coro_sv, int flags)
910	{	1361	{
911	dTHX;	1362	dTHX;
		1363	struct coro *coro = SvSTATE (coro_sv);
912		1364
913	LOCK;	1365	if (flags & CC_TRACE)
914	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1366	{
915	UNLOCK;	1367	if (!coro->cctx)
		1368	coro->cctx = cctx_new ();
		1369	else if (!(coro->cctx->flags & CC_TRACE))
		1370	croak ("cannot enable tracing on coroutine with custom stack");
916		1371
917	api_schedule ();	1372	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
918	}	1373	}
		1374	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1375	{
		1376	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
919		1377
		1378	if (coro->flags & CF_RUNNING)
		1379	PL_runops = RUNOPS_DEFAULT;
		1380	else
		1381	coro->runops = RUNOPS_DEFAULT;
		1382	}
		1383	}
		1384
920	MODULE = Coro::State PACKAGE = Coro::State	1385	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
921		1386
922	PROTOTYPES: ENABLE	1387	PROTOTYPES: DISABLE
923		1388
924	BOOT:	1389	BOOT:
925	{ /* {} necessary for stoopid perl-5.6.x */	1390	{
926	#ifdef USE_ITHREADS	1391	#ifdef USE_ITHREADS
927	MUTEX_INIT (&coro_mutex);	1392	MUTEX_INIT (&coro_mutex);
928	#endif	1393	#endif
929	BOOT_PAGESIZE;	1394	BOOT_PAGESIZE;
930		1395
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1397
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1402
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1403	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1404	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1405	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1406	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1407	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1408	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1409	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
939		1410
940	main_mainstack = PL_mainstack;	1411	main_mainstack = PL_mainstack;
		1412	main_top_env = PL_top_env;
		1413
		1414	while (main_top_env->je_prev)
		1415	main_top_env = main_top_env->je_prev;
941		1416
942	coroapi.ver = CORO_API_VERSION;	1417	coroapi.ver = CORO_API_VERSION;
943	coroapi.transfer = api_transfer;	1418	coroapi.transfer = api_transfer;
944	}
945		1419
946	Coro::State	1420	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1421	}
		1422
		1423	SV *
947	new (char *klass, ...)	1424	new (char *klass, ...)
948	PROTOTYPE: $@
949	CODE:	1425	CODE:
950	{	1426	{
951	Coro__State coro;	1427	struct coro *coro;
		1428	HV *hv;
952	int i;	1429	int i;
953
954	if (!SvOK (ST (1)))
955	croak ("Coro::State::new needs something callable as first argument");
956		1430
957	Newz (0, coro, 1, struct coro);	1431	Newz (0, coro, 1, struct coro);
958	coro->args = newAV ();	1432	coro->args = newAV ();
		1433	coro->save = CORO_SAVE_DEF;
		1434	coro->flags = CF_NEW;
		1435
		1436	if (coro_first) coro_first->prev = coro;
		1437	coro->next = coro_first;
		1438	coro_first = coro;
		1439
		1440	coro->hv = hv = newHV ();
		1441	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1442	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
959		1443
960	for (i = 1; i < items; i++)	1444	for (i = 1; i < items; i++)
961	av_push (coro->args, newSVsv (ST (i)));	1445	av_push (coro->args, newSVsv (ST (i)));
962
963	RETVAL = coro;
964
965	/*coro->mainstack = 0; *//*actual work is done inside transfer */
966	/*coro->stack = 0;*/
967	}	1446	}
968	OUTPUT:	1447	OUTPUT:
969	RETVAL	1448	RETVAL
970		1449
		1450	int
		1451	save (SV *coro, int new_save = -1)
		1452	CODE:
		1453	RETVAL = api_save (coro, new_save);
		1454	OUTPUT:
		1455	RETVAL
		1456
		1457	int
		1458	save_also (SV *coro_sv, int save_also)
		1459	CODE:
		1460	{
		1461	struct coro *coro = SvSTATE (coro_sv);
		1462	RETVAL = coro->save;
		1463	coro->save |= save_also;
		1464	}
		1465	OUTPUT:
		1466	RETVAL
		1467
		1468	# these not obviously related functions are all rolled into the same xs
		1469	# function to increase chances that they all will call transfer with the same
		1470	# stack offset
971	void	1471	void
972	transfer(prev, next, flags)	1472	_set_stacklevel (...)
973	SV *prev	1473	ALIAS:
974	SV *next	1474	Coro::State::transfer = 1
975	int flags	1475	Coro::schedule = 2
976	PROTOTYPE: @	1476	Coro::cede = 3
		1477	Coro::cede_notself = 4
977	CODE:	1478	CODE:
978	PUTBACK;	1479	{
979	SV_CORO (next, "Coro::transfer");	1480	struct transfer_args ta;
980	SV_CORO (prev, "Coro::transfer");	1481
981	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1482	switch (ix)
982	SPAGAIN;	1483	{
		1484	case 0:
		1485	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1486	ta.next = 0;
		1487	break;
		1488
		1489	case 1:
		1490	if (items != 2)
		1491	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1492
		1493	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1494	break;
		1495
		1496	case 2:
		1497	prepare_schedule (aTHX_ &ta);
		1498	break;
		1499
		1500	case 3:
		1501	prepare_cede (aTHX_ &ta);
		1502	break;
		1503
		1504	case 4:
		1505	if (!prepare_cede_notself (aTHX_ &ta))
		1506	XSRETURN_EMPTY;
		1507
		1508	break;
		1509	}
		1510
		1511	BARRIER;
		1512	TRANSFER (ta);
		1513
		1514	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1515	XSRETURN_YES;
		1516	}
		1517
		1518	bool
		1519	_destroy (SV *coro_sv)
		1520	CODE:
		1521	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1522	OUTPUT:
		1523	RETVAL
983		1524
984	void	1525	void
985	DESTROY(coro)
986	Coro::State coro
987	CODE:
988
989	if (coro->mainstack && coro->mainstack != main_mainstack)
990	{
991	struct coro temp;
992
993	PUTBACK;
994	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
995	LOAD (aTHX_ coro);
996	SPAGAIN;
997
998	destroy_stacks (aTHX);
999
1000	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1001	SPAGAIN;
1002
1003	coro->mainstack = 0;
1004	}
1005
1006	deallocate_stack (coro);
1007	SvREFCNT_dec (coro->args);
1008	Safefree (coro);
1009
1010	void
1011	_exit(code)	1526	_exit (code)
1012	int code	1527	int code
1013	PROTOTYPE: $	1528	PROTOTYPE: $
1014	CODE:	1529	CODE:
1015	_exit (code);	1530	_exit (code);
1016		1531
1017	MODULE = Coro::State PACKAGE = Coro::Cont	1532	int
		1533	cctx_stacksize (int new_stacksize = 0)
		1534	CODE:
		1535	RETVAL = coro_stacksize;
		1536	if (new_stacksize)
		1537	coro_stacksize = new_stacksize;
		1538	OUTPUT:
		1539	RETVAL
		1540
		1541	int
		1542	cctx_count ()
		1543	CODE:
		1544	RETVAL = cctx_count;
		1545	OUTPUT:
		1546	RETVAL
		1547
		1548	int
		1549	cctx_idle ()
		1550	CODE:
		1551	RETVAL = cctx_idle;
		1552	OUTPUT:
		1553	RETVAL
1018		1554
1019	void	1555	void
1020	yield(...)	1556	list ()
1021	PROTOTYPE: @	1557	PPCODE:
		1558	{
		1559	struct coro *coro;
		1560	for (coro = coro_first; coro; coro = coro->next)
		1561	if (coro->hv)
		1562	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1563	}
		1564
		1565	void
		1566	call (Coro::State coro, SV *coderef)
		1567	ALIAS:
		1568	eval = 1
		1569	CODE:
		1570	{
		1571	if (coro->mainstack)
		1572	{
		1573	struct coro temp;
		1574	Zero (&temp, 1, struct coro);
		1575	temp.save = CORO_SAVE_ALL;
		1576
		1577	if (!(coro->flags & CF_RUNNING))
		1578	{
		1579	save_perl (aTHX_ &temp);
		1580	load_perl (aTHX_ coro);
		1581	}
		1582
		1583	{
		1584	dSP;
		1585	ENTER;
		1586	SAVETMPS;
		1587	PUSHMARK (SP);
		1588	PUTBACK;
		1589	if (ix)
		1590	eval_sv (coderef, 0);
		1591	else
		1592	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1593	SPAGAIN;
		1594	FREETMPS;
		1595	LEAVE;
		1596	PUTBACK;
		1597	}
		1598
		1599	if (!(coro->flags & CF_RUNNING))
		1600	{
		1601	save_perl (aTHX_ coro);
		1602	load_perl (aTHX_ &temp);
		1603	}
		1604	}
		1605	}
		1606
		1607	SV *
		1608	is_ready (Coro::State coro)
		1609	PROTOTYPE: $
		1610	ALIAS:
		1611	is_ready = CF_READY
		1612	is_running = CF_RUNNING
		1613	is_new = CF_NEW
		1614	is_destroyed = CF_DESTROYED
		1615	CODE:
		1616	RETVAL = boolSV (coro->flags & ix);
		1617	OUTPUT:
		1618	RETVAL
		1619
		1620	void
		1621	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1622
		1623	SV *
		1624	has_stack (Coro::State coro)
		1625	PROTOTYPE: $
		1626	CODE:
		1627	RETVAL = boolSV (!!coro->cctx);
		1628	OUTPUT:
		1629	RETVAL
		1630
		1631	int
		1632	is_traced (Coro::State coro)
		1633	PROTOTYPE: $
		1634	CODE:
		1635	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1636	OUTPUT:
		1637	RETVAL
		1638
		1639	IV
		1640	rss (Coro::State coro)
		1641	PROTOTYPE: $
		1642	ALIAS:
		1643	usecount = 1
1022	CODE:	1644	CODE:
1023	SV *yieldstack;	1645	switch (ix)
1024	SV *sv;	1646	{
1025	AV *defav = GvAV (PL_defgv);	1647	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1026	struct coro *prev, *next;	1648	case 1: RETVAL = coro->usecount; break;
1027
1028	yieldstack = *hv_fetch (
1029	(HV *)SvRV (GvSV (coro_current)),
1030	"yieldstack", sizeof ("yieldstack") - 1,
1031	0	1649	}
1032	);	1650	OUTPUT:
		1651	RETVAL
1033		1652
1034	/* set up @_ -- ugly */
1035	av_clear (defav);
1036	av_fill (defav, items - 1);
1037	while (items--)
1038	av_store (defav, items, SvREFCNT_inc (ST(items)));
1039
1040	sv = av_pop ((AV *)SvRV (yieldstack));
1041	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1042	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1043	SvREFCNT_dec (sv);
1044
1045	coro_state_transfer (aTHX_ prev, next, 0);
1046		1653
1047	MODULE = Coro::State PACKAGE = Coro	1654	MODULE = Coro::State PACKAGE = Coro
1048		1655
1049	BOOT:	1656	BOOT:
1050	{	1657	{
1051	int i;	1658	int i;
		1659
		1660	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1661	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1662	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1663
		1664	coro_current = get_sv ("Coro::current", FALSE);
		1665	SvREADONLY_on (coro_current);
		1666
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1667	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1668
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1669	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1670	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1671	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1672	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1673	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1674	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1675
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1676	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065	coro_ready[i] = newAV ();	1677	coro_ready[i] = newAV ();
1066		1678
1067	{	1679	{
1068	SV *sv = perl_get_sv("Coro::API", 1);	1680	SV *sv = perl_get_sv("Coro::API", 1);
1069		1681
1070	coroapi.schedule = api_schedule;	1682	coroapi.schedule = api_schedule;
		1683	coroapi.save = api_save;
1071	coroapi.cede = api_cede;	1684	coroapi.cede = api_cede;
		1685	coroapi.cede_notself = api_cede_notself;
1072	coroapi.ready = api_ready;	1686	coroapi.ready = api_ready;
		1687	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1688	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1689	coroapi.current = coro_current;
1075		1690
1076	GCoroAPI = &coroapi;	1691	GCoroAPI = &coroapi;
1077	sv_setiv (sv, (IV)&coroapi);	1692	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on (sv);	1693	SvREADONLY_on (sv);
1079	}	1694	}
1080	}	1695	}
1081		1696
1082	#if !PERL_MICRO
1083
1084	void	1697	void
1085	ready(self)	1698	_set_current (SV *current)
1086	SV * self
1087	PROTOTYPE: $	1699	PROTOTYPE: $
1088	CODE:	1700	CODE:
1089	api_ready (self);	1701	SvREFCNT_dec (SvRV (coro_current));
1090		1702	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091	#endif
1092		1703
1093	int	1704	int
		1705	prio (Coro::State coro, int newprio = 0)
		1706	ALIAS:
		1707	nice = 1
		1708	CODE:
		1709	{
		1710	RETVAL = coro->prio;
		1711
		1712	if (items > 1)
		1713	{
		1714	if (ix)
		1715	newprio = coro->prio - newprio;
		1716
		1717	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1718	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1719
		1720	coro->prio = newprio;
		1721	}
		1722	}
		1723	OUTPUT:
		1724	RETVAL
		1725
		1726	SV *
		1727	ready (SV *self)
		1728	PROTOTYPE: $
		1729	CODE:
		1730	RETVAL = boolSV (api_ready (self));
		1731	OUTPUT:
		1732	RETVAL
		1733
		1734	int
1094	nready(...)	1735	nready (...)
1095	PROTOTYPE:	1736	PROTOTYPE:
1096	CODE:	1737	CODE:
1097	RETVAL = coro_nready;	1738	RETVAL = coro_nready;
1098	OUTPUT:	1739	OUTPUT:
1099	RETVAL	1740	RETVAL
1100		1741
		1742	# for async_pool speedup
1101	void	1743	void
1102	schedule(...)	1744	_pool_1 (SV *cb)
1103	PROTOTYPE:
1104	CODE:	1745	CODE:
1105	api_schedule ();	1746	{
		1747	int i, len;
		1748	HV *hv = (HV *)SvRV (coro_current);
		1749	AV *defav = GvAV (PL_defgv);
		1750	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1751	AV *invoke_av;
		1752
		1753	if (!invoke)
		1754	croak ("\3terminate\2\n");
		1755
		1756	hv_store (hv, "desc", sizeof ("desc") - 1,
		1757	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1758
		1759	invoke_av = (AV *)SvRV (invoke);
		1760	len = av_len (invoke_av);
		1761
		1762	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1763
		1764	if (len > 0)
		1765	{
		1766	av_fill (defav, len - 1);
		1767	for (i = 0; i < len; ++i)
		1768	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1769	}
		1770
		1771	SvREFCNT_dec (invoke);
		1772	}
1106		1773
1107	void	1774	void
1108	cede(...)	1775	_pool_2 (SV *cb)
1109	PROTOTYPE:
1110	CODE:	1776	CODE:
1111	api_cede ();	1777	{
		1778	struct coro *coro = SvSTATE (coro_current);
1112		1779
1113	# and these are hacks	1780	sv_setsv (cb, &PL_sv_undef);
		1781
		1782	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1783	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1784	croak ("\3terminate\2\n");
		1785
		1786	av_clear (GvAV (PL_defgv));
		1787	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1788	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1789
		1790	coro->save = CORO_SAVE_DEF;
		1791	coro->prio = 0;
		1792
		1793	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1794	api_trace (coro_current, 0);
		1795
		1796	av_push (av_async_pool, newSVsv (coro_current));
		1797	}
		1798
		1799
		1800	MODULE = Coro::State PACKAGE = Coro::AIO
		1801
1114	SV *	1802	SV *
1115	_aio_get_state ()	1803	_get_state ()
1116	CODE:	1804	CODE:
1117	{	1805	{
1118	struct {	1806	struct io_state *data;
1119	int errorno;
1120	int laststype;
1121	int laststatval;
1122	Stat_t statcache;
1123	} data;
1124		1807
		1808	RETVAL = newSV (sizeof (struct io_state));
		1809	data = (struct io_state *)SvPVX (RETVAL);
		1810	SvCUR_set (RETVAL, sizeof (struct io_state));
		1811	SvPOK_only (RETVAL);
		1812
1125	data.errorno = errno;	1813	data->errorno = errno;
1126	data.laststype = PL_laststype;	1814	data->laststype = PL_laststype;
1127	data.laststatval = PL_laststatval;	1815	data->laststatval = PL_laststatval;
1128	data.statcache = PL_statcache;	1816	data->statcache = PL_statcache;
1129
1130	RETVAL = newSVpvn ((char *)&data, sizeof data);
1131	}	1817	}
1132	OUTPUT:	1818	OUTPUT:
1133	RETVAL	1819	RETVAL
1134		1820
1135	void	1821	void
1136	_aio_set_state (char *data_)	1822	_set_state (char *data_)
1137	PROTOTYPE: $	1823	PROTOTYPE: $
1138	CODE:	1824	CODE:
1139	{	1825	{
1140	struct {	1826	struct io_state *data = (void *)data_;
1141	int errorno;
1142	int laststype;
1143	int laststatval;
1144	Stat_t statcache;
1145	} *data = (void *)data_;
1146		1827
1147	errno = data->errorno;	1828	errno = data->errorno;
1148	PL_laststype = data->laststype;	1829	PL_laststype = data->laststype;
1149	PL_laststatval = data->laststatval;	1830	PL_laststatval = data->laststatval;
1150	PL_statcache = data->statcache;	1831	PL_statcache = data->statcache;
1151	}	1832	}
		1833

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