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Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.190 by root, Fri Oct 5 20:39:39 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
34		84
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	85	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	86	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	87	#endif
53	# include <limits.h>	88
54	# ifndef PAGESIZE	89	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	90	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	91	#endif
61	#endif
62		92
63	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	94	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	95	# define CORO_PREFER_PERL_FUNCTIONS 0
		96	#endif
		97
		98	/* The next macros try to return the current stack pointer, in an as
		99	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	100	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	101	#define STACKLEVEL ((void *)&stacklevel)
68		102
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	103	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		104
		105	#if __GNUC__ >= 3
		106	# define attribute(x) __attribute__(x)
		107	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		108	#else
		109	# define attribute(x)
		110	# define BARRIER
		111	#endif
		112
		113	#define NOINLINE attribute ((noinline))
		114
71	#include "CoroAPI.h"	115	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		116
75	#ifdef USE_ITHREADS	117	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	118	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	119	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	120	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	121	#else
80	# define LOCK (void)0	122	# define LOCK (void)0
81	# define UNLOCK (void)0	123	# define UNLOCK (void)0
82	#endif	124	#endif
83		125
		126	/* helper storage struct for Coro::AIO */
		127	struct io_state
		128	{
		129	int errorno;
		130	I32 laststype;
		131	int laststatval;
		132	Stat_t statcache;
		133	};
		134
		135	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	136	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	137	static AV *main_mainstack; /* used to differentiate between $main and others */
		138	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	139	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	140	static SV *coro_mortal; /* will be freed after next transfer */
88		141
		142	static GV *irsgv; /* $/ */
		143	static GV *stdoutgv; /* *STDOUT */
		144
		145	/* async_pool helper stuff */
		146	static SV *sv_pool_rss;
		147	static SV *sv_pool_size;
		148	static AV *av_async_pool;
		149
		150	static struct coro_cctx *cctx_first;
		151	static int cctx_count, cctx_idle;
		152
		153	enum {
		154	CC_MAPPED = 0x01,
		155	CC_NOREUSE = 0x02, /* throw this away after tracing */
		156	CC_TRACE = 0x04,
		157	CC_TRACE_SUB = 0x08, /* trace sub calls */
		158	CC_TRACE_LINE = 0x10, /* trace each statement */
		159	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		160	};
		161
89	/* this is a structure representing a c-level coroutine */	162	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	163	typedef struct coro_cctx {
91	struct coro_stack *next;	164	struct coro_cctx *next;
92		165
93	/* the stack */	166	/* the stack */
94	void *sptr;	167	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	168	size_t ssize;
96		169
97	/* cpu state */	170	/* cpu state */
98	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	171	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		172	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	173	JMPENV *top_env;
100	coro_context cctx;	174	coro_context cctx;
101	} coro_stack;	175
		176	#if CORO_USE_VALGRIND
		177	int valgrind_id;
		178	#endif
		179	unsigned char flags;
		180	} coro_cctx;
		181
		182	enum {
		183	CF_RUNNING = 0x0001, /* coroutine is running */
		184	CF_READY = 0x0002, /* coroutine is ready */
		185	CF_NEW = 0x0004, /* has never been switched to */
		186	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		187	};
102		188
103	/* this is a structure representing a perl-level coroutine */	189	/* this is a structure representing a perl-level coroutine */
104	struct coro {	190	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	191	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	192	coro_cctx *cctx;
107		193
108	/* data associated with this coroutine (initial args) */	194	/* data associated with this coroutine (initial args) */
109	AV *args;	195	AV *args;
110	int refcnt;	196	int refcnt;
		197	int flags; /* CF_ flags */
111		198
112	/* optionally saved, might be zero */	199	/* optionally saved, might be zero */
113	AV *defav;	200	AV *defav; /* @_ */
114	SV *defsv;	201	SV *defsv; /* $_ */
115	SV *errsv;	202	SV *errsv; /* $@ */
		203	SV *deffh; /* default filehandle */
		204	SV *irssv; /* $/ */
		205	SV *irssv_sv; /* real $/ cache */
116		206
117	/* saved global state not related to stacks */	207	#define VAR(name,type) type name;
118	U8 dowarn;	208	# include "state.h"
119	I32 in_eval;	209	#undef VAR
120		210
121	/* the stacks and related info (callchain etc..) */	211	/* statistics */
122	PERL_SI *curstackinfo;	212	int usecount; /* number of transfers to this coro */
123	AV *curstack;
124	AV *mainstack;
125	SV **stack_sp;
126	OP *op;
127	SV **curpad;
128	AV *comppad;
129	CV *compcv;
130	SV **stack_base;
131	SV **stack_max;
132	SV **tmps_stack;
133	I32 tmps_floor;
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		213
151	/* coro process data */	214	/* coro process data */
152	int prio;	215	int prio;
		216	//SV *throw;
		217
		218	/* async_pool */
		219	SV *saved_deffh;
		220
		221	/* linked list */
		222	struct coro *next, *prev;
		223	HV *hv; /* the perl hash associated with this coro, if any */
153	};	224	};
154		225
155	typedef struct coro *Coro__State;	226	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	227	typedef struct coro *Coro__State_or_hashref;
157		228
		229	/** Coro ********************************************************************/
		230
		231	#define PRIO_MAX 3
		232	#define PRIO_HIGH 1
		233	#define PRIO_NORMAL 0
		234	#define PRIO_LOW -1
		235	#define PRIO_IDLE -3
		236	#define PRIO_MIN -4
		237
		238	/* for Coro.pm */
		239	static SV *coro_current;
		240	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		241	static int coro_nready;
		242	static struct coro *coro_first;
		243
		244	/** lowlevel stuff **********************************************************/
		245
158	static AV *	246	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	247	coro_clone_padlist (pTHX_ CV *cv)
160	{	248	{
161	AV *padlist = CvPADLIST (cv);	249	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	250	AV *newpadlist, *newpad;
163		251
164	newpadlist = newAV ();	252	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	253	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	254	#if PERL_VERSION_ATLEAST (5,9,0)
		255	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		256	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	257	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	258	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	259	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	260	--AvFILLp (padlist);
173		261
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	262	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		306
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	307	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		308
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	309	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		310
		311	#define CORO_MAGIC(cv) \
		312	SvMAGIC (cv) \
		313	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		314	? SvMAGIC (cv) \
		315	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		316	: 0
		317
		318	static struct coro *
		319	SvSTATE_ (pTHX_ SV *coro)
		320	{
		321	HV *stash;
		322	MAGIC *mg;
		323
		324	if (SvROK (coro))
		325	coro = SvRV (coro);
		326
		327	if (SvTYPE (coro) != SVt_PVHV)
		328	croak ("Coro::State object required");
		329
		330	stash = SvSTASH (coro);
		331	if (stash != coro_stash && stash != coro_state_stash)
		332	{
		333	/* very slow, but rare, check */
		334	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		335	croak ("Coro::State object required");
		336	}
		337
		338	mg = CORO_MAGIC (coro);
		339	return (struct coro *)mg->mg_ptr;
		340	}
		341
		342	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		343
223	/* the next two functions merely cache the padlists */	344	/* the next two functions merely cache the padlists */
224	static void	345	static void
225	get_padlist (pTHX_ CV *cv)	346	get_padlist (pTHX_ CV *cv)
226	{	347	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	348	MAGIC *mg = CORO_MAGIC (cv);
		349	AV *av;
228		350
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	351	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	352	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	353	else
232	{	354	{
233	#if 0	355	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this is probably cleaner, but also slower? */	356	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	357	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	358	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	359	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	360	SvREFCNT_dec (cp);
239	#else	361	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	362	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	365	}
244		366
245	static void	367	static void
246	put_padlist (pTHX_ CV *cv)	368	put_padlist (pTHX_ CV *cv)
247	{	369	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	MAGIC *mg = CORO_MAGIC (cv);
		371	AV *av;
249		372
250	if (!mg)	373	if (!mg)
251	{	374	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	375	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	376	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	377	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	378	mg->mg_obj = (SV *)newAV ();
256	}	379	}
257		380
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	381	av = (AV *)mg->mg_obj;
259	}
260		382
261	#define SB do {	383	if (AvFILLp (av) >= AvMAX (av))
262	#define SE } while (0)	384	av_extend (av, AvMAX (av) + 1);
263		385
264	#define LOAD(state) load_state(aTHX_ (state));	386	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	387	}
266		388
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	389	/** load & save, init *******************************************************/
268		390
269	static void	391	static void
270	load_state(pTHX_ Coro__State c)	392	load_perl (pTHX_ Coro__State c)
271	{	393	{
272	PL_dowarn = c->dowarn;	394	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	395	# include "state.h"
		396	#undef VAR
274		397
275	PL_curstackinfo = c->curstackinfo;	398	GvSV (PL_defgv) = c->defsv;
276	PL_curstack = c->curstack;	399	GvAV (PL_defgv) = c->defav;
277	PL_mainstack = c->mainstack;	400	GvSV (PL_errgv) = c->errsv;
278	PL_stack_sp = c->stack_sp;	401	GvSV (irsgv) = c->irssv_sv;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		402
310	{	403	{
311	dSP;	404	dSP;
312	CV *cv;	405	CV *cv;
313		406
314	/* now do the ugly restore mess */	407	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	408	while ((cv = (CV *)POPs))
316	{	409	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	410	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	411	CvDEPTH (cv) = PTR2IV (POPs);
323	}	412	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	413	}
327		414
328	PUTBACK;	415	PUTBACK;
329	}	416	}
330	}	417	}
331		418
332	static void	419	static void
333	save_state(pTHX_ Coro__State c, int flags)	420	save_perl (pTHX_ Coro__State c)
334	{	421	{
335	{	422	{
336	dSP;	423	dSP;
337	I32 cxix = cxstack_ix;	424	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	425	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	428	/*
342	* the worst thing you can imagine happens first - we have to save	429	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	430	* (and reinitialize) all cv's in the whole callchain :(
344	*/	431	*/
345		432
346	PUSHs (Nullsv);	433	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	434	/* this loop was inspired by pp_caller */
348	for (;;)	435	for (;;)
349	{	436	{
350	while (cxix >= 0)	437	while (cxix >= 0)
351	{	438	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	439	PERL_CONTEXT *cx = &ccstk[cxix--];
353		440
354	if (CxTYPE(cx) == CXt_SUB)	441	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
355	{	442	{
356	CV *cv = cx->blk_sub.cv;	443	CV *cv = cx->blk_sub.cv;
		444
357	if (CvDEPTH(cv))	445	if (CvDEPTH (cv))
358	{	446	{
359	EXTEND (SP, CvDEPTH(cv)*2);	447	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));	448	PUSHs ((SV *)CvPADLIST (cv));
		449	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	450	PUSHs ((SV *)cv);
370		451
		452	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	453	get_padlist (aTHX_ cv);
372	}	454	}
373	}	455	}
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	}	456	}
383		457
384	if (top_si->si_type == PERLSI_MAIN)	458	if (top_si->si_type == PERLSI_MAIN)
385	break;	459	break;
386		460
387	top_si = top_si->si_prev;	461	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	462	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	463	cxix = top_si->si_cxix;
390	}	464	}
391		465
392	PUTBACK;	466	PUTBACK;
393	}	467	}
394		468
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	469	c->defav = GvAV (PL_defgv);
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	470	c->defsv = DEFSV;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	471	c->errsv = ERRSV;
		472	c->irssv_sv = GvSV (irsgv);
398		473
399	c->dowarn = PL_dowarn;	474	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	475	# include "state.h"
401		476	#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	}	477	}
433		478
434	/*	479	/*
435	* allocate various perl stacks. This is an exact copy	480	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	481	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	482	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	483	* not usually need a lot of stackspace.
439	*/	484	*/
		485	#if CORO_PREFER_PERL_FUNCTIONS
		486	# define coro_init_stacks init_stacks
		487	#else
440	static void	488	static void
441	coro_init_stacks (pTHX)	489	coro_init_stacks (pTHX)
442	{	490	{
443	LOCK;	491	PL_curstackinfo = new_stackinfo(64, 6);
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	492	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	493	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	494	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		495
450	PL_stack_base = AvARRAY(PL_curstack);	496	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	497	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	498	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		499
454	New(50,PL_tmps_stack,96,SV*);	500	New(50,PL_tmps_stack,64,SV*);
455	PL_tmps_floor = -1;	501	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	502	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	503	PL_tmps_max = 64;
458		504
459	New(54,PL_markstack,16,I32);	505	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	506	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	507	PL_markstack_max = PL_markstack + 16;
462		508
…		…
466		512
467	New(54,PL_scopestack,16,I32);	513	New(54,PL_scopestack,16,I32);
468	PL_scopestack_ix = 0;	514	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	515	PL_scopestack_max = 16;
470		516
471	New(54,PL_savestack,96,ANY);	517	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	518	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	519	PL_savestack_max = 64;
474		520
475	#if PERL_VERSION < 9	521	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	522	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	523	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	524	PL_retstack_max = 4;
479	#endif	525	#endif
480
481	UNLOCK;
482	}	526	}
		527	#endif
483		528
484	/*	529	/*
485	* destroy the stacks, the callchain etc...	530	* destroy the stacks, the callchain etc...
486	*/	531	*/
487	static void	532	static void
488	destroy_stacks(pTHX)	533	coro_destroy_stacks (pTHX)
489	{	534	{
490	if (!IN_DESTRUCT)
491	{
492	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);
494
495	/* sure it is, but more important: is it correct?? :/ */
496	FREETMPS;
497
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499	}
500
501	while (PL_curstackinfo->si_next)	535	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	536	PL_curstackinfo = PL_curstackinfo->si_next;
503		537
504	while (PL_curstackinfo)	538	while (PL_curstackinfo)
505	{	539	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	540	PERL_SI *p = PL_curstackinfo->si_prev;
507		541
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	542	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	543	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		544
520	Safefree (PL_curstackinfo->si_cxstack);	545	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	546	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	547	PL_curstackinfo = p;
523	}	548	}
524		549
525	Safefree (PL_tmps_stack);	550	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	551	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	552	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	553	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	554	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	555	Safefree (PL_retstack);
531	#endif	556	#endif
532	}	557	}
533		558
534	static void	559	static size_t
535	setup_coro (struct coro *coro)	560	coro_rss (pTHX_ struct coro *coro)
		561	{
		562	size_t rss = sizeof (*coro);
		563
		564	if (coro->mainstack)
		565	{
		566	if (coro->flags & CF_RUNNING)
		567	{
		568	#define VAR(name,type)coro->name = PL_ ## name;
		569	# include "state.h"
		570	#undef VAR
		571	}
		572
		573	rss += sizeof (coro->curstackinfo);
		574	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		575	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		576	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		577	rss += coro->tmps_max * sizeof (SV *);
		578	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		579	rss += coro->scopestack_max * sizeof (I32);
		580	rss += coro->savestack_max * sizeof (ANY);
		581
		582	#if !PERL_VERSION_ATLEAST (5,9,0)
		583	rss += coro->retstack_max * sizeof (OP *);
		584	#endif
		585	}
		586
		587	return rss;
		588	}
		589
		590	/** coroutine stack handling ************************************************/
		591
		592	static void
		593	coro_setup (pTHX_ struct coro *coro)
536	{	594	{
537	/*	595	/*
538	* emulate part of the perl startup here.	596	* emulate part of the perl startup here.
539	*/	597	*/
540	dTHX;	598	coro_init_stacks (aTHX);
		599
		600	PL_runops = RUNOPS_DEFAULT;
		601	PL_curcop = &PL_compiling;
		602	PL_in_eval = EVAL_NULL;
		603	PL_comppad = 0;
		604	PL_curpm = 0;
		605	PL_localizing = 0;
		606	PL_dirty = 0;
		607	PL_restartop = 0;
		608
		609	GvSV (PL_defgv) = NEWSV (0, 0);
		610	GvAV (PL_defgv) = coro->args; coro->args = 0;
		611	GvSV (PL_errgv) = NEWSV (0, 0);
		612	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		613	PL_rs = newSVsv (GvSV (irsgv));
		614	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		615
		616	{
		617	dSP;
		618	LOGOP myop;
		619
		620	Zero (&myop, 1, LOGOP);
		621	myop.op_next = Nullop;
		622	myop.op_flags = OPf_WANT_VOID;
		623
		624	PUSHMARK (SP);
		625	XPUSHs (av_shift (GvAV (PL_defgv)));
		626	PUTBACK;
		627	PL_op = (OP *)&myop;
		628	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		629	SPAGAIN;
		630	}
		631
		632	ENTER; /* necessary e.g. for dounwind */
		633	}
		634
		635	static void
		636	coro_destroy (pTHX_ struct coro *coro)
		637	{
		638	if (!IN_DESTRUCT)
		639	{
		640	/* restore all saved variables and stuff */
		641	LEAVE_SCOPE (0);
		642	assert (PL_tmps_floor == -1);
		643
		644	/* free all temporaries */
		645	FREETMPS;
		646	assert (PL_tmps_ix == -1);
		647
		648	/* unwind all extra stacks */
		649	POPSTACK_TO (PL_mainstack);
		650
		651	/* unwind main stack */
		652	dounwind (-1);
		653	}
		654
		655	SvREFCNT_dec (GvSV (PL_defgv));
		656	SvREFCNT_dec (GvAV (PL_defgv));
		657	SvREFCNT_dec (GvSV (PL_errgv));
		658	SvREFCNT_dec (PL_defoutgv);
		659	SvREFCNT_dec (PL_rs);
		660	SvREFCNT_dec (GvSV (irsgv));
		661
		662	SvREFCNT_dec (coro->saved_deffh);
		663	//SvREFCNT_dec (coro->throw);
		664
		665	coro_destroy_stacks (aTHX);
		666	}
		667
		668	static void
		669	free_coro_mortal (pTHX)
		670	{
		671	if (coro_mortal)
		672	{
		673	SvREFCNT_dec (coro_mortal);
		674	coro_mortal = 0;
		675	}
		676	}
		677
		678	static int
		679	runops_trace (pTHX)
		680	{
		681	COP *oldcop = 0;
		682	int oldcxix = -2;
		683	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		684	coro_cctx *cctx = coro->cctx;
		685
		686	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		687	{
		688	PERL_ASYNC_CHECK ();
		689
		690	if (cctx->flags & CC_TRACE_ALL)
		691	{
		692	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		693	{
		694	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		695	SV **bot, **top;
		696	AV *av = newAV (); /* return values */
		697	SV **cb;
		698	dSP;
		699
		700	GV *gv = CvGV (cx->blk_sub.cv);
		701	SV *fullname = sv_2mortal (newSV (0));
		702	if (isGV (gv))
		703	gv_efullname3 (fullname, gv, 0);
		704
		705	bot = PL_stack_base + cx->blk_oldsp + 1;
		706	top = cx->blk_gimme == G_ARRAY ? SP + 1
		707	: cx->blk_gimme == G_SCALAR ? bot + 1
		708	: bot;
		709
		710	while (bot < top)
		711	av_push (av, SvREFCNT_inc (*bot++));
		712
		713	PL_runops = RUNOPS_DEFAULT;
		714	ENTER;
		715	SAVETMPS;
		716	EXTEND (SP, 3);
		717	PUSHMARK (SP);
		718	PUSHs (&PL_sv_no);
		719	PUSHs (fullname);
		720	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		721	PUTBACK;
		722	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		723	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		724	SPAGAIN;
		725	FREETMPS;
		726	LEAVE;
		727	PL_runops = runops_trace;
		728	}
		729
		730	if (oldcop != PL_curcop)
		731	{
		732	oldcop = PL_curcop;
		733
		734	if (PL_curcop != &PL_compiling)
		735	{
		736	SV **cb;
		737
		738	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		739	{
		740	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		741
		742	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		743	{
		744	runops_proc_t old_runops = PL_runops;
		745	dSP;
		746	GV *gv = CvGV (cx->blk_sub.cv);
		747	SV *fullname = sv_2mortal (newSV (0));
		748
		749	if (isGV (gv))
		750	gv_efullname3 (fullname, gv, 0);
		751
		752	PL_runops = RUNOPS_DEFAULT;
		753	ENTER;
		754	SAVETMPS;
		755	EXTEND (SP, 3);
		756	PUSHMARK (SP);
		757	PUSHs (&PL_sv_yes);
		758	PUSHs (fullname);
		759	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		760	PUTBACK;
		761	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		762	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		763	SPAGAIN;
		764	FREETMPS;
		765	LEAVE;
		766	PL_runops = runops_trace;
		767	}
		768
		769	oldcxix = cxstack_ix;
		770	}
		771
		772	if (cctx->flags & CC_TRACE_LINE)
		773	{
		774	dSP;
		775
		776	PL_runops = RUNOPS_DEFAULT;
		777	ENTER;
		778	SAVETMPS;
		779	EXTEND (SP, 3);
		780	PL_runops = RUNOPS_DEFAULT;
		781	PUSHMARK (SP);
		782	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		783	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		784	PUTBACK;
		785	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		786	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		787	SPAGAIN;
		788	FREETMPS;
		789	LEAVE;
		790	PL_runops = runops_trace;
		791	}
		792	}
		793	}
		794	}
		795	}
		796
		797	TAINT_NOT;
		798	return 0;
		799	}
		800
		801	/* inject a fake call to Coro::State::_cctx_init into the execution */
		802	/* _cctx_init should be careful, as it could be called at almost any time */
		803	/* during execution of a perl program */
		804	static void NOINLINE
		805	prepare_cctx (pTHX_ coro_cctx *cctx)
		806	{
541	dSP;	807	dSP;
542	UNOP myop;	808	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		809
545	coro_init_stacks (aTHX);	810	PL_top_env = &PL_start_env;
546	/*PL_curcop = 0;*/
547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550		811
551	SPAGAIN;	812	if (cctx->flags & CC_TRACE)
		813	PL_runops = runops_trace;
552		814
553	Zero (&myop, 1, UNOP);	815	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	816	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	817	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		818
		819	PUSHMARK (SP);
		820	EXTEND (SP, 2);
		821	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		822	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		823	PUTBACK;
557	PL_op = (OP *)&myop;	824	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	825	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	826	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}	827	}
567		828
568	static void	829	/*
569	free_coro_mortal ()	830	* this is a _very_ stripped down perl interpreter ;)
570	{	831	*/
571	if (coro_mortal)
572	{
573	dTHX;
574
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578	}
579
580	static void	832	static void
581	coro_run (void *arg)	833	coro_run (void *arg)
582	{	834	{
		835	dTHX;
		836
		837	/* coro_run is the alternative tail of transfer(), so unlock here. */
		838	UNLOCK;
		839
		840	/* we now skip the entersub that lead to transfer() */
		841	PL_op = PL_op->op_next;
		842
		843	/* inject a fake subroutine call to cctx_init */
		844	prepare_cctx (aTHX_ (coro_cctx *)arg);
		845
		846	/* somebody or something will hit me for both perl_run and PL_restartop */
		847	PL_restartop = PL_op;
		848	perl_run (PL_curinterp);
		849
583	/*	850	/*
584	* this is a _very_ stripped down perl interpreter ;)	851	* If perl-run returns we assume exit() was being called or the coro
		852	* fell off the end, which seems to be the only valid (non-bug)
		853	* reason for perl_run to return. We try to exit by jumping to the
		854	* bootstrap-time "top" top_env, as we cannot restore the "main"
		855	* coroutine as Coro has no such concept
585	*/	856	*/
586	dTHX;
587	int ret;
588
589	UNLOCK;
590
591	PL_top_env = &PL_start_env;	857	PL_top_env = main_top_env;
592		858	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595
596	/* continue at cctx_init, without entersub */
597	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599	/* somebody will hit me for both perl_run and PL_restartop */
600	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601	printf ("ret %d\n", ret);//D
602
603	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604	abort ();
605	}	859	}
606		860
607	static coro_stack *	861	static coro_cctx *
608	stack_new ()	862	cctx_new ()
609	{	863	{
610	coro_stack *stack;	864	coro_cctx *cctx;
		865	void *stack_start;
		866	size_t stack_size;
611		867
		868	++cctx_count;
		869
612	New (0, stack, 1, coro_stack);	870	Newz (0, cctx, 1, coro_cctx);
613		871
614	#if HAVE_MMAP	872	#if HAVE_MMAP
615		873
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	874	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
617	/* mmap suppsedly does allocate-on-write for us */	875	/* mmap supposedly does allocate-on-write for us */
618	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	876	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619		877
620	if (stack->sptr == (void *)-1)	878	if (cctx->sptr != (void *)-1)
621	{
622	perror ("FATAL: unable to mmap stack for coroutine");
623	_exit (EXIT_FAILURE);
624	}	879	{
625
626	# if STACKGUARD	880	# if CORO_STACKGUARD
627	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	881	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
628	# endif	882	# endif
629		883	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
630	#else	884	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
631		885	cctx->flags |= CC_MAPPED;
632	stack->ssize = STACKSIZE * (long)sizeof (long);
633	New (0, stack->sptr, STACKSIZE, long);
634
635	if (!stack->sptr)
636	{	886	}
		887	else
		888	#endif
		889	{
		890	cctx->ssize = coro_stacksize * (long)sizeof (long);
		891	New (0, cctx->sptr, coro_stacksize, long);
		892
		893	if (!cctx->sptr)
		894	{
637	perror (stderr, "FATAL: unable to malloc stack for coroutine");	895	perror ("FATAL: unable to allocate stack for coroutine");
638	_exit (EXIT_FAILURE);	896	_exit (EXIT_FAILURE);
639	}	897	}
640		898
641	#endif	899	stack_start = cctx->sptr;
		900	stack_size = cctx->ssize;
		901	}
642		902
		903	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
643	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	904	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
644		905
645	return stack;	906	return cctx;
646	}	907	}
647		908
648	static void	909	static void
649	stack_free (coro_stack *stack)	910	cctx_destroy (coro_cctx *cctx)
650	{	911	{
651	if (!stack)	912	if (!cctx)
652	return;	913	return;
653		914
		915	--cctx_count;
		916
		917	#if CORO_USE_VALGRIND
		918	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		919	#endif
		920
654	#if HAVE_MMAP	921	#if HAVE_MMAP
		922	if (cctx->flags & CC_MAPPED)
655	munmap (stack->sptr, stack->ssize);	923	munmap (cctx->sptr, cctx->ssize);
656	#else
657	Safefree (stack->sptr);
658	#endif
659
660	Safefree (stack);
661	}
662
663	static coro_stack *stack_first;
664
665	static coro_stack *
666	stack_get ()
667	{
668	coro_stack *stack;
669
670	if (stack_first)
671	{
672	stack = stack_first;
673	stack_first = stack->next;
674	}
675	else	924	else
		925	#endif
		926	Safefree (cctx->sptr);
		927
		928	Safefree (cctx);
		929	}
		930
		931	static coro_cctx *
		932	cctx_get (pTHX)
		933	{
		934	while (cctx_first)
676	{	935	{
677	stack = stack_new ();	936	coro_cctx *cctx = cctx_first;
678	PL_op = PL_op->op_next;	937	cctx_first = cctx->next;
		938	--cctx_idle;
		939
		940	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		941	return cctx;
		942
		943	cctx_destroy (cctx);
679	}	944	}
680		945
681	return stack;	946	return cctx_new ();
682	}	947	}
683		948
684	static void	949	static void
685	stack_put (coro_stack *stack)	950	cctx_put (coro_cctx *cctx)
686	{	951	{
687	stack->next = stack_first;	952	/* free another cctx if overlimit */
688	stack_first = stack;	953	if (cctx_idle >= MAX_IDLE_CCTX)
689	}	954	{
		955	coro_cctx *first = cctx_first;
		956	cctx_first = first->next;
		957	--cctx_idle;
690		958
691	/* never call directly, always through the coro_state_transfer global variable */	959	cctx_destroy (first);
692	static void	960	}
		961
		962	++cctx_idle;
		963	cctx->next = cctx_first;
		964	cctx_first = cctx;
		965	}
		966
		967	/** coroutine switching *****************************************************/
		968
		969	static void NOINLINE
		970	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		971	{
		972	if (prev != next)
		973	{
		974	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		975	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		976
		977	if (next->flags & CF_RUNNING)
		978	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		979
		980	if (next->flags & CF_DESTROYED)
		981	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		982
		983	if (PL_lex_state != LEX_NOTPARSING)
		984	croak ("Coro::State::transfer called while parsing, but this is not supported");
		985	}
		986	}
		987
		988	/* always use the TRANSFER macro */
		989	static void NOINLINE
693	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	990	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	991	{
695	dSTACKLEVEL;	992	dSTACKLEVEL;
696		993
697	/* sometimes transfer is only called to set idle_sp */	994	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	995	if (!next)
		996	{
699	((coro_stack *)prev)->idle_sp = STACKLEVEL;	997	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		998	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		999	}
700	else if (prev != next)	1000	else if (prev != next)
701	{	1001	{
702	coro_stack *prev__stack;	1002	coro_cctx *prev__cctx;
		1003
		1004	if (prev->flags & CF_NEW)
		1005	{
		1006	/* create a new empty context */
		1007	Newz (0, prev->cctx, 1, coro_cctx);
		1008	prev->flags &= ~CF_NEW;
		1009	prev->flags |= CF_RUNNING;
		1010	}
		1011
		1012	prev->flags &= ~CF_RUNNING;
		1013	next->flags |= CF_RUNNING;
703		1014
704	LOCK;	1015	LOCK;
705		1016
706	if (next->mainstack)	1017	if (next->flags & CF_NEW)
707	{	1018	{
708	/* coroutine already started */	1019	/* need to start coroutine */
709	SAVE (prev, flags);	1020	next->flags &= ~CF_NEW;
710	LOAD (next);	1021	/* first get rid of the old state */
		1022	save_perl (aTHX_ prev);
		1023	/* setup coroutine call */
		1024	coro_setup (aTHX_ next);
711	}	1025	}
712	else	1026	else
713	{	1027	{
714	/* need to start coroutine */	1028	/* coroutine already started */
715	/* first get rid of the old state */	1029	save_perl (aTHX_ prev);
716	SAVE (prev, -1);	1030	load_perl (aTHX_ next);
717	/* setup coroutine call */
718	setup_coro (next);
719	/* need a stack */
720	next->stack = 0;
721	}	1031	}
722		1032
723	if (!prev->stack)
724	/* create a new empty context */
725	Newz (0, prev->stack, 1, coro_stack);
726
727	prev__stack = prev->stack;	1033	prev__cctx = prev->cctx;
728		1034
729	/* possibly "free" the stack */	1035	/* possibly "free" the cctx */
730	if (prev__stack->idle_sp == STACKLEVEL)	1036	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
731	{	1037	{
732	stack_put (prev__stack);	1038	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1039	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1040
733	prev->stack = 0;	1041	prev->cctx = 0;
		1042
		1043	cctx_put (prev__cctx);
734	}	1044	}
735		1045
		1046	++next->usecount;
		1047
736	if (!next->stack)	1048	if (!next->cctx)
737	next->stack = stack_get ();	1049	next->cctx = cctx_get (aTHX);
738		1050
739	if (prev__stack != next->stack)	1051	if (prev__cctx != next->cctx)
740	{	1052	{
741	prev__stack->top_env = PL_top_env;	1053	prev__cctx->top_env = PL_top_env;
742	PL_top_env = next->stack->top_env;	1054	PL_top_env = next->cctx->top_env;
743	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1055	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
744	}	1056	}
745		1057
746	free_coro_mortal ();	1058	free_coro_mortal (aTHX);
747
748	UNLOCK;	1059	UNLOCK;
749	}	1060	}
750	}	1061	}
751		1062
752	/* use this function pointer to call the above function */
753	/* this is done to increase chances of the compiler not inlining the call */
754	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757	struct transfer_args	1063	struct transfer_args
758	{	1064	{
759	struct coro *prev, *next;	1065	struct coro *prev, *next;
760	int flags;
761	};	1066	};
762		1067
763	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1068	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1069	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
764		1070
		1071	/** high level stuff ********************************************************/
		1072
765	static void	1073	static int
766	coro_state_destroy (struct coro *coro)	1074	coro_state_destroy (pTHX_ struct coro *coro)
767	{	1075	{
768	if (coro->refcnt--)	1076	if (coro->flags & CF_DESTROYED)
769	return;	1077	return 0;
		1078
		1079	coro->flags |= CF_DESTROYED;
		1080
		1081	if (coro->flags & CF_READY)
		1082	{
		1083	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1084	/* alternative: look through all ready queues and remove the coro */
		1085	LOCK;
		1086	--coro_nready;
		1087	UNLOCK;
		1088	}
		1089	else
		1090	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
770		1091
771	if (coro->mainstack && coro->mainstack != main_mainstack)	1092	if (coro->mainstack && coro->mainstack != main_mainstack)
772	{	1093	{
773	struct coro temp;	1094	struct coro temp;
774		1095
775	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1096	if (coro->flags & CF_RUNNING)
		1097	croak ("FATAL: tried to destroy currently running coroutine");
		1098
		1099	save_perl (aTHX_ &temp);
776	LOAD (aTHX_ coro);	1100	load_perl (aTHX_ coro);
777		1101
778	destroy_stacks (aTHX);	1102	coro_destroy (aTHX_ coro);
779		1103
780	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1104	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
781		1105
782	coro->mainstack = 0;	1106	coro->mainstack = 0;
783	}	1107	}
784		1108
785	stack_free (coro->stack);	1109	cctx_destroy (coro->cctx);
786	SvREFCNT_dec (coro->args);	1110	SvREFCNT_dec (coro->args);
787	Safefree (coro);	1111
		1112	if (coro->next) coro->next->prev = coro->prev;
		1113	if (coro->prev) coro->prev->next = coro->next;
		1114	if (coro == coro_first) coro_first = coro->next;
		1115
		1116	return 1;
788	}	1117	}
789		1118
790	static int	1119	static int
791	coro_state_clear (SV *sv, MAGIC *mg)	1120	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
792	{	1121	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	1122	struct coro *coro = (struct coro *)mg->mg_ptr;
794	mg->mg_ptr = 0;	1123	mg->mg_ptr = 0;
795		1124
		1125	coro->hv = 0;
		1126
		1127	if (--coro->refcnt < 0)
		1128	{
796	coro_state_destroy (coro);	1129	coro_state_destroy (aTHX_ coro);
		1130	Safefree (coro);
		1131	}
797		1132
798	return 0;	1133	return 0;
799	}	1134	}
800		1135
801	static int	1136	static int
802	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1137	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
803	{	1138	{
804	struct coro *coro = (struct coro *)mg->mg_ptr;	1139	struct coro *coro = (struct coro *)mg->mg_ptr;
805		1140
806	++coro->refcnt;	1141	++coro->refcnt;
807		1142
808	return 0;	1143	return 0;
809	}	1144	}
810		1145
811	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1146	static MGVTBL coro_state_vtbl = {
		1147	0, 0, 0, 0,
		1148	coro_state_free,
		1149	0,
		1150	#ifdef MGf_DUP
		1151	coro_state_dup,
		1152	#else
		1153	# define MGf_DUP 0
		1154	#endif
		1155	};
812		1156
813	static struct coro *
814	SvSTATE (SV *coro)
815	{
816	HV *stash;
817	MAGIC *mg;
818
819	if (SvROK (coro))
820	coro = SvRV (coro);
821
822	stash = SvSTASH (coro);
823	if (stash != coro_stash && stash != coro_state_stash)
824	{
825	/* very slow, but rare, check */
826	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827	croak ("Coro::State object required");
828	}
829
830	mg = SvMAGIC (coro);
831	assert (mg->mg_type == PERL_MAGIC_ext);
832	return (struct coro *)mg->mg_ptr;
833	}
834
835	static void	1157	static void
836	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1158	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
837	{	1159	{
838	ta->prev = SvSTATE (prev);	1160	ta->prev = SvSTATE (prev_sv);
839	ta->next = SvSTATE (next);	1161	ta->next = SvSTATE (next_sv);
840	ta->flags = flags;	1162	TRANSFER_CHECK (*ta);
841	}	1163	}
842		1164
843	static void	1165	static void
844	api_transfer (SV *prev, SV *next, int flags)	1166	api_transfer (SV *prev_sv, SV *next_sv)
845	{	1167	{
846	dTHX;	1168	dTHX;
847	struct transfer_args ta;	1169	struct transfer_args ta;
848		1170
849	prepare_transfer (aTHX_ &ta, prev, next, flags);	1171	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
850	TRANSFER (ta);	1172	TRANSFER (ta);
851	}	1173	}
852		1174
853	/** Coro ********************************************************************/	1175	/** Coro ********************************************************************/
854		1176
855	#define PRIO_MAX 3
856	#define PRIO_HIGH 1
857	#define PRIO_NORMAL 0
858	#define PRIO_LOW -1
859	#define PRIO_IDLE -3
860	#define PRIO_MIN -4
861
862	/* for Coro.pm */
863	static GV *coro_current, *coro_idle;
864	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865	static int coro_nready;
866
867	static void	1177	static void
868	coro_enq (pTHX_ SV *sv)	1178	coro_enq (pTHX_ SV *coro_sv)
869	{	1179	{
870	int prio;
871
872	if (SvTYPE (sv) != SVt_PVHV)
873	croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875	prio = SvSTATE (sv)->prio;
876
877	av_push (coro_ready [prio - PRIO_MIN], sv);	1180	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
878	coro_nready++;
879	}	1181	}
880		1182
881	static SV *	1183	static SV *
882	coro_deq (pTHX_ int min_prio)	1184	coro_deq (pTHX_ int min_prio)
883	{	1185	{
…		…
887	if (min_prio < 0)	1189	if (min_prio < 0)
888	min_prio = 0;	1190	min_prio = 0;
889		1191
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1192	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (AvFILLp (coro_ready [prio]) >= 0)	1193	if (AvFILLp (coro_ready [prio]) >= 0)
892	{
893	coro_nready--;
894	return av_shift (coro_ready [prio]);	1194	return av_shift (coro_ready [prio]);
895	}
896		1195
897	return 0;	1196	return 0;
898	}	1197	}
899		1198
900	static void	1199	static int
901	api_ready (SV *coro)	1200	api_ready (SV *coro_sv)
902	{	1201	{
903	dTHX;	1202	dTHX;
		1203	struct coro *coro;
904		1204
905	if (SvROK (coro))	1205	if (SvROK (coro_sv))
906	coro = SvRV (coro);	1206	coro_sv = SvRV (coro_sv);
		1207
		1208	coro = SvSTATE (coro_sv);
		1209
		1210	if (coro->flags & CF_READY)
		1211	return 0;
		1212
		1213	coro->flags |= CF_READY;
907		1214
908	LOCK;	1215	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	1216	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1217	++coro_nready;
910	UNLOCK;	1218	UNLOCK;
911	}
912		1219
		1220	return 1;
		1221	}
		1222
913	static void	1223	static int
		1224	api_is_ready (SV *coro_sv)
		1225	{
		1226	dTHX;
		1227	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1228	}
		1229
		1230	static void
914	prepare_schedule (aTHX_ struct transfer_args *ta)	1231	prepare_schedule (pTHX_ struct transfer_args *ta)
915	{	1232	{
916	SV *current, *prev, *next;	1233	SV *prev_sv, *next_sv;
		1234
		1235	for (;;)
		1236	{
		1237	LOCK;
		1238	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1239
		1240	/* nothing to schedule: call the idle handler */
		1241	if (!next_sv)
		1242	{
		1243	dSP;
		1244	UNLOCK;
		1245
		1246	ENTER;
		1247	SAVETMPS;
		1248
		1249	PUSHMARK (SP);
		1250	PUTBACK;
		1251	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1252
		1253	FREETMPS;
		1254	LEAVE;
		1255	continue;
		1256	}
		1257
		1258	ta->next = SvSTATE (next_sv);
		1259
		1260	/* cannot transfer to destroyed coros, skip and look for next */
		1261	if (ta->next->flags & CF_DESTROYED)
		1262	{
		1263	UNLOCK;
		1264	SvREFCNT_dec (next_sv);
		1265	/* coro_nready is already taken care of by destroy */
		1266	continue;
		1267	}
		1268
		1269	--coro_nready;
		1270	UNLOCK;
		1271	break;
		1272	}
		1273
		1274	/* free this only after the transfer */
		1275	prev_sv = SvRV (coro_current);
		1276	ta->prev = SvSTATE (prev_sv);
		1277	TRANSFER_CHECK (*ta);
		1278	assert (ta->next->flags & CF_READY);
		1279	ta->next->flags &= ~CF_READY;
		1280	SvRV_set (coro_current, next_sv);
917		1281
918	LOCK;	1282	LOCK;
919
920	current = GvSV (coro_current);
921
922	for (;;)
923	{
924	LOCK;
925
926	next = coro_deq (aTHX_ PRIO_MIN);
927
928	if (next)
929	break;
930
931	UNLOCK;
932
933	{
934	dSP;
935
936	ENTER;
937	SAVETMPS;
938
939	PUSHMARK (SP);
940	PUTBACK;
941	call_sv (GvSV (coro_idle), G_DISCARD);
942
943	FREETMPS;
944	LEAVE;
945	}
946	}
947
948	prev = SvRV (current);
949	SvRV (current) = next;
950
951	/* free this only after the transfer */
952	free_coro_mortal ();	1283	free_coro_mortal (aTHX);
953	coro_mortal = prev;	1284	coro_mortal = prev_sv;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958
959	UNLOCK;	1285	UNLOCK;
960	}	1286	}
961		1287
962	static void	1288	static void
963	prepare_cede (aTHX_ struct transfer_args *ta)	1289	prepare_cede (pTHX_ struct transfer_args *ta)
964	{	1290	{
965	LOCK;	1291	api_ready (coro_current);
966	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967	UNLOCK;
968
969	prepare_schedule (ta);	1292	prepare_schedule (aTHX_ ta);
		1293	}
		1294
		1295	static int
		1296	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1297	{
		1298	if (coro_nready)
		1299	{
		1300	SV *prev = SvRV (coro_current);
		1301	prepare_schedule (aTHX_ ta);
		1302	api_ready (prev);
		1303	return 1;
		1304	}
		1305	else
		1306	return 0;
970	}	1307	}
971		1308
972	static void	1309	static void
973	api_schedule (void)	1310	api_schedule (void)
974	{	1311	{
975	dTHX;	1312	dTHX;
976	struct transfer_args ta;	1313	struct transfer_args ta;
977		1314
978	prepare_schedule (&ta);	1315	prepare_schedule (aTHX_ &ta);
979	TRANSFER (ta);	1316	TRANSFER (ta);
980	}	1317	}
981		1318
982	static void	1319	static int
983	api_cede (void)	1320	api_cede (void)
984	{	1321	{
985	dTHX;	1322	dTHX;
986	struct transfer_args ta;	1323	struct transfer_args ta;
987		1324
988	prepare_cede (&ta);	1325	prepare_cede (aTHX_ &ta);
		1326
		1327	if (ta.prev != ta.next)
		1328	{
989	TRANSFER (ta);	1329	TRANSFER (ta);
		1330	return 1;
		1331	}
		1332	else
		1333	return 0;
990	}	1334	}
991		1335
		1336	static int
		1337	api_cede_notself (void)
		1338	{
		1339	dTHX;
		1340	struct transfer_args ta;
		1341
		1342	if (prepare_cede_notself (aTHX_ &ta))
		1343	{
		1344	TRANSFER (ta);
		1345	return 1;
		1346	}
		1347	else
		1348	return 0;
		1349	}
		1350
		1351	static void
		1352	api_trace (SV *coro_sv, int flags)
		1353	{
		1354	dTHX;
		1355	struct coro *coro = SvSTATE (coro_sv);
		1356
		1357	if (flags & CC_TRACE)
		1358	{
		1359	if (!coro->cctx)
		1360	coro->cctx = cctx_new ();
		1361	else if (!(coro->cctx->flags & CC_TRACE))
		1362	croak ("cannot enable tracing on coroutine with custom stack");
		1363
		1364	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1365	}
		1366	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1367	{
		1368	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1369
		1370	if (coro->flags & CF_RUNNING)
		1371	PL_runops = RUNOPS_DEFAULT;
		1372	else
		1373	coro->runops = RUNOPS_DEFAULT;
		1374	}
		1375	}
		1376
992	MODULE = Coro::State PACKAGE = Coro::State	1377	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
993		1378
994	PROTOTYPES: DISABLE	1379	PROTOTYPES: DISABLE
995		1380
996	BOOT:	1381	BOOT:
997	{	1382	{
998	#ifdef USE_ITHREADS	1383	#ifdef USE_ITHREADS
999	MUTEX_INIT (&coro_mutex);	1384	MUTEX_INIT (&coro_mutex);
1000	#endif	1385	#endif
1001	BOOT_PAGESIZE;	1386	BOOT_PAGESIZE;
1002		1387
		1388	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1389	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1390
1003	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1391	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004		1392
1005	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1006	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1007	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1396	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1008		1397
1009	main_mainstack = PL_mainstack;	1398	main_mainstack = PL_mainstack;
		1399	main_top_env = PL_top_env;
		1400
		1401	while (main_top_env->je_prev)
		1402	main_top_env = main_top_env->je_prev;
1010		1403
1011	coroapi.ver = CORO_API_VERSION;	1404	coroapi.ver = CORO_API_VERSION;
1012	coroapi.transfer = api_transfer;	1405	coroapi.transfer = api_transfer;
1013		1406
1014	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1407	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1021	struct coro *coro;	1414	struct coro *coro;
1022	HV *hv;	1415	HV *hv;
1023	int i;	1416	int i;
1024		1417
1025	Newz (0, coro, 1, struct coro);	1418	Newz (0, coro, 1, struct coro);
1026	coro->args = newAV ();	1419	coro->args = newAV ();
		1420	coro->flags = CF_NEW;
1027		1421
		1422	if (coro_first) coro_first->prev = coro;
		1423	coro->next = coro_first;
		1424	coro_first = coro;
		1425
1028	hv = newHV ();	1426	coro->hv = hv = newHV ();
1029	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1427	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1030	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1428	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031		1429
1032	for (i = 1; i < items; i++)	1430	for (i = 1; i < items; i++)
1033	av_push (coro->args, newSVsv (ST (i)));	1431	av_push (coro->args, newSVsv (ST (i)));
1034
1035	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1036	/*coro->stack = 0;*/
1037	}	1432	}
1038	OUTPUT:	1433	OUTPUT:
1039	RETVAL	1434	RETVAL
1040		1435
		1436	# these not obviously related functions are all rolled into the same xs
		1437	# function to increase chances that they all will call transfer with the same
		1438	# stack offset
1041	void	1439	void
1042	_set_stacklevel (...)	1440	_set_stacklevel (...)
1043	ALIAS:	1441	ALIAS:
1044	Coro::State::transfer = 1	1442	Coro::State::transfer = 1
1045	Coro::schedule = 2	1443	Coro::schedule = 2
1046	Coro::cede = 3	1444	Coro::cede = 3
1047	Coro::Cont::yield = 4	1445	Coro::cede_notself = 4
1048	CODE:	1446	CODE:
1049	{	1447	{
1050	struct transfer_args ta;	1448	struct transfer_args ta;
1051		1449
1052	switch (ix)	1450	switch (ix)
1053	{	1451	{
1054	case 0:	1452	case 0:
1055	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1453	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1056	ta.next = 0;	1454	ta.next = 0;
1057	ta.flags = TRANSFER_SET_STACKLEVEL;
1058	break;	1455	break;
1059		1456
1060	case 1:	1457	case 1:
1061	if (items != 3)	1458	if (items != 2)
1062	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1459	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1063		1460
1064	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1461	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1065	break;	1462	break;
1066		1463
1067	case 2:	1464	case 2:
1068	prepare_schedule (&ta);	1465	prepare_schedule (aTHX_ &ta);
1069	break;	1466	break;
1070		1467
1071	case 3:	1468	case 3:
1072	prepare_cede (&ta);	1469	prepare_cede (aTHX_ &ta);
1073	break;	1470	break;
1074		1471
1075	case 4:	1472	case 4:
1076	{	1473	if (!prepare_cede_notself (aTHX_ &ta))
1077	SV *yieldstack;	1474	XSRETURN_EMPTY;
1078	SV *sv;
1079	AV *defav = GvAV (PL_defgv);
1080		1475
1081	yieldstack = *hv_fetch (
1082	(HV *)SvRV (GvSV (coro_current)),
1083	"yieldstack", sizeof ("yieldstack") - 1,
1084	0
1085	);
1086
1087	/* set up @_ -- ugly */
1088	av_clear (defav);
1089	av_fill (defav, items - 1);
1090	while (items--)
1091	av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093	sv = av_pop ((AV *)SvRV (yieldstack));
1094	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096	ta.flags = 0;
1097	SvREFCNT_dec (sv);
1098	}
1099	break;	1476	break;
1100
1101	}	1477	}
1102		1478
		1479	BARRIER;
1103	TRANSFER (ta);	1480	TRANSFER (ta);
1104	}
1105		1481
1106	void	1482	if (GIMME_V != G_VOID && ta.next != ta.prev)
1107	_clone_state_from (SV *dst, SV *src)	1483	XSRETURN_YES;
		1484	}
		1485
		1486	bool
		1487	_destroy (SV *coro_sv)
1108	CODE:	1488	CODE:
1109	{	1489	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1110	struct coro *coro_src = SvSTATE (src);	1490	OUTPUT:
1111		1491	RETVAL
1112	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114	++coro_src->refcnt;
1115	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116	}
1117
1118	void
1119	_nonlocal_goto (IV nextop)
1120	CODE:
1121	/* uuh, somebody will kill me again for this */
1122	PL_op->op_next = INT2PTR (OP *, nextop);
1123		1492
1124	void	1493	void
1125	_exit (code)	1494	_exit (code)
1126	int code	1495	int code
1127	PROTOTYPE: $	1496	PROTOTYPE: $
1128	CODE:	1497	CODE:
1129	_exit (code);	1498	_exit (code);
1130		1499
		1500	int
		1501	cctx_stacksize (int new_stacksize = 0)
		1502	CODE:
		1503	RETVAL = coro_stacksize;
		1504	if (new_stacksize)
		1505	coro_stacksize = new_stacksize;
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	int
		1510	cctx_count ()
		1511	CODE:
		1512	RETVAL = cctx_count;
		1513	OUTPUT:
		1514	RETVAL
		1515
		1516	int
		1517	cctx_idle ()
		1518	CODE:
		1519	RETVAL = cctx_idle;
		1520	OUTPUT:
		1521	RETVAL
		1522
		1523	void
		1524	list ()
		1525	PPCODE:
		1526	{
		1527	struct coro *coro;
		1528	for (coro = coro_first; coro; coro = coro->next)
		1529	if (coro->hv)
		1530	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1531	}
		1532
		1533	void
		1534	call (Coro::State coro, SV *coderef)
		1535	ALIAS:
		1536	eval = 1
		1537	CODE:
		1538	{
		1539	if (coro->mainstack)
		1540	{
		1541	struct coro temp;
		1542	Zero (&temp, 1, struct coro);
		1543
		1544	if (!(coro->flags & CF_RUNNING))
		1545	{
		1546	save_perl (aTHX_ &temp);
		1547	load_perl (aTHX_ coro);
		1548	}
		1549
		1550	{
		1551	dSP;
		1552	ENTER;
		1553	SAVETMPS;
		1554	PUSHMARK (SP);
		1555	PUTBACK;
		1556	if (ix)
		1557	eval_sv (coderef, 0);
		1558	else
		1559	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1560	SPAGAIN;
		1561	FREETMPS;
		1562	LEAVE;
		1563	PUTBACK;
		1564	}
		1565
		1566	if (!(coro->flags & CF_RUNNING))
		1567	{
		1568	save_perl (aTHX_ coro);
		1569	load_perl (aTHX_ &temp);
		1570	}
		1571	}
		1572	}
		1573
		1574	SV *
		1575	is_ready (Coro::State coro)
		1576	PROTOTYPE: $
		1577	ALIAS:
		1578	is_ready = CF_READY
		1579	is_running = CF_RUNNING
		1580	is_new = CF_NEW
		1581	is_destroyed = CF_DESTROYED
		1582	CODE:
		1583	RETVAL = boolSV (coro->flags & ix);
		1584	OUTPUT:
		1585	RETVAL
		1586
		1587	void
		1588	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1589
		1590	SV *
		1591	has_stack (Coro::State coro)
		1592	PROTOTYPE: $
		1593	CODE:
		1594	RETVAL = boolSV (!!coro->cctx);
		1595	OUTPUT:
		1596	RETVAL
		1597
		1598	int
		1599	is_traced (Coro::State coro)
		1600	PROTOTYPE: $
		1601	CODE:
		1602	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1603	OUTPUT:
		1604	RETVAL
		1605
		1606	IV
		1607	rss (Coro::State coro)
		1608	PROTOTYPE: $
		1609	ALIAS:
		1610	usecount = 1
		1611	CODE:
		1612	switch (ix)
		1613	{
		1614	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1615	case 1: RETVAL = coro->usecount; break;
		1616	}
		1617	OUTPUT:
		1618	RETVAL
		1619
		1620
1131	MODULE = Coro::State PACKAGE = Coro	1621	MODULE = Coro::State PACKAGE = Coro
1132		1622
1133	BOOT:	1623	BOOT:
1134	{	1624	{
1135	int i;	1625	int i;
		1626
		1627	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1628	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1629	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1630
		1631	coro_current = get_sv ("Coro::current", FALSE);
		1632	SvREADONLY_on (coro_current);
1136		1633
1137	coro_stash = gv_stashpv ("Coro", TRUE);	1634	coro_stash = gv_stashpv ("Coro", TRUE);
1138		1635
1139	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1636	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1140	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1637	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1141	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1638	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1639	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1640	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1641	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145		1642
1146	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1147	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1148
1149	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1643	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150	coro_ready[i] = newAV ();	1644	coro_ready[i] = newAV ();
1151		1645
1152	{	1646	{
1153	SV *sv = perl_get_sv("Coro::API", 1);	1647	SV *sv = perl_get_sv("Coro::API", 1);
1154		1648
1155	coroapi.schedule = api_schedule;	1649	coroapi.schedule = api_schedule;
1156	coroapi.cede = api_cede;	1650	coroapi.cede = api_cede;
		1651	coroapi.cede_notself = api_cede_notself;
1157	coroapi.ready = api_ready;	1652	coroapi.ready = api_ready;
		1653	coroapi.is_ready = api_is_ready;
1158	coroapi.nready = &coro_nready;	1654	coroapi.nready = &coro_nready;
1159	coroapi.current = coro_current;	1655	coroapi.current = coro_current;
1160		1656
1161	GCoroAPI = &coroapi;	1657	GCoroAPI = &coroapi;
1162	sv_setiv (sv, (IV)&coroapi);	1658	sv_setiv (sv, (IV)&coroapi);
1163	SvREADONLY_on (sv);	1659	SvREADONLY_on (sv);
1164	}	1660	}
1165	}	1661	}
		1662
		1663	void
		1664	_set_current (SV *current)
		1665	PROTOTYPE: $
		1666	CODE:
		1667	SvREFCNT_dec (SvRV (coro_current));
		1668	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1166		1669
1167	int	1670	int
1168	prio (Coro::State coro, int newprio = 0)	1671	prio (Coro::State coro, int newprio = 0)
1169	ALIAS:	1672	ALIAS:
1170	nice = 1	1673	nice = 1
…		…
1173	RETVAL = coro->prio;	1676	RETVAL = coro->prio;
1174		1677
1175	if (items > 1)	1678	if (items > 1)
1176	{	1679	{
1177	if (ix)	1680	if (ix)
1178	newprio += coro->prio;	1681	newprio = coro->prio - newprio;
1179		1682
1180	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1683	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1684	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182		1685
1183	coro->prio = newprio;	1686	coro->prio = newprio;
1184	}	1687	}
1185	}	1688	}
		1689	OUTPUT:
		1690	RETVAL
1186		1691
1187	void	1692	SV *
1188	ready (SV *self)	1693	ready (SV *self)
1189	PROTOTYPE: $	1694	PROTOTYPE: $
1190	CODE:	1695	CODE:
1191	api_ready (self);	1696	RETVAL = boolSV (api_ready (self));
		1697	OUTPUT:
		1698	RETVAL
1192		1699
1193	int	1700	int
1194	nready (...)	1701	nready (...)
1195	PROTOTYPE:	1702	PROTOTYPE:
1196	CODE:	1703	CODE:
1197	RETVAL = coro_nready;	1704	RETVAL = coro_nready;
1198	OUTPUT:	1705	OUTPUT:
1199	RETVAL	1706	RETVAL
1200		1707
		1708	# for async_pool speedup
		1709	void
		1710	_pool_1 (SV *cb)
		1711	CODE:
		1712	{
		1713	struct coro *coro = SvSTATE (coro_current);
		1714	HV *hv = (HV *)SvRV (coro_current);
		1715	AV *defav = GvAV (PL_defgv);
		1716	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1717	AV *invoke_av;
		1718	int i, len;
		1719
		1720	if (!invoke)
		1721	croak ("\3terminate\2\n");
		1722
		1723	SvREFCNT_dec (coro->saved_deffh);
		1724	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1725
		1726	hv_store (hv, "desc", sizeof ("desc") - 1,
		1727	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1728
		1729	invoke_av = (AV *)SvRV (invoke);
		1730	len = av_len (invoke_av);
		1731
		1732	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1733
		1734	if (len > 0)
		1735	{
		1736	av_fill (defav, len - 1);
		1737	for (i = 0; i < len; ++i)
		1738	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1739	}
		1740
		1741	SvREFCNT_dec (invoke);
		1742	}
		1743
		1744	void
		1745	_pool_2 (SV *cb)
		1746	CODE:
		1747	{
		1748	struct coro *coro = SvSTATE (coro_current);
		1749
		1750	sv_setsv (cb, &PL_sv_undef);
		1751
		1752	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1753	coro->saved_deffh = 0;
		1754
		1755	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1756	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1757	croak ("\3terminate\2\n");
		1758
		1759	av_clear (GvAV (PL_defgv));
		1760	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1761	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1762
		1763	coro->prio = 0;
		1764
		1765	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1766	api_trace (coro_current, 0);
		1767
		1768	av_push (av_async_pool, newSVsv (coro_current));
		1769	}
		1770
		1771
1201	MODULE = Coro::State PACKAGE = Coro::AIO	1772	MODULE = Coro::State PACKAGE = Coro::AIO
1202		1773
1203	SV *	1774	SV *
1204	_get_state ()	1775	_get_state ()
1205	CODE:	1776	CODE:
1206	{	1777	{
1207	struct {	1778	struct io_state *data;
1208	int errorno;
1209	int laststype;
1210	int laststatval;
1211	Stat_t statcache;
1212	} data;
1213		1779
		1780	RETVAL = newSV (sizeof (struct io_state));
		1781	data = (struct io_state *)SvPVX (RETVAL);
		1782	SvCUR_set (RETVAL, sizeof (struct io_state));
		1783	SvPOK_only (RETVAL);
		1784
1214	data.errorno = errno;	1785	data->errorno = errno;
1215	data.laststype = PL_laststype;	1786	data->laststype = PL_laststype;
1216	data.laststatval = PL_laststatval;	1787	data->laststatval = PL_laststatval;
1217	data.statcache = PL_statcache;	1788	data->statcache = PL_statcache;
1218
1219	RETVAL = newSVpvn ((char *)&data, sizeof data);
1220	}	1789	}
1221	OUTPUT:	1790	OUTPUT:
1222	RETVAL	1791	RETVAL
1223		1792
1224	void	1793	void
1225	_set_state (char *data_)	1794	_set_state (char *data_)
1226	PROTOTYPE: $	1795	PROTOTYPE: $
1227	CODE:	1796	CODE:
1228	{	1797	{
1229	struct {	1798	struct io_state *data = (void *)data_;
1230	int errorno;
1231	int laststype;
1232	int laststatval;
1233	Stat_t statcache;
1234	} *data = (void *)data_;
1235		1799
1236	errno = data->errorno;	1800	errno = data->errorno;
1237	PL_laststype = data->laststype;	1801	PL_laststype = data->laststype;
1238	PL_laststatval = data->laststatval;	1802	PL_laststatval = data->laststatval;
1239	PL_statcache = data->statcache;	1803	PL_statcache = data->statcache;
1240	}	1804	}
		1805

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