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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.100 by root, Mon Nov 27 00:07:49 2006 UTC vs.
Revision 1.184 by root, Thu Oct 4 13:45:56 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
		10
		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
8		47
9	#define PERL_VERSION_ATLEAST(a,b,c) \	48	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	49	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	50	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	51	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <stdio.h>	75	/* 5.8.7 */
37	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
38		79
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	81	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	82	#endif
57	# include <limits.h>	83
58	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	86	#endif
65	#endif
66		87
67	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
68	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
69	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
70	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
71	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
72		97
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		99
75	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	103	#else
78	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
79	#endif	106	#endif
80		107
81	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
82		109
83	#include "CoroAPI.h"	110	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		111
87	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	116	#else
92	# define LOCK (void)0	117	# define LOCK (void)0
93	# define UNLOCK (void)0	118	# define UNLOCK (void)0
94	#endif	119	#endif
95		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;
96	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
97	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;
98	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
100		136
		137	static GV *irsgv; /* $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
		155
101	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	157	typedef struct coro_cctx {
103	struct coro_stack *next;	158	struct coro_cctx *next;
104		159
105	/* the stack */	160	/* the stack */
106	void *sptr;	161	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
108		163
109	/* cpu state */	164	/* cpu state */
110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	167	JMPENV *top_env;
112	coro_context cctx;	168	coro_context cctx;
113	} coro_stack;	169
		170	#if CORO_USE_VALGRIND
		171	int valgrind_id;
		172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
114		182
115	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
116	struct coro {	184	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	186	coro_cctx *cctx;
119		187
120	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
121	AV *args;	189	AV *args;
122	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
123		192
124	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
125	AV *defav;	194	AV *defav; /* @_ */
126	SV *defsv;	195	SV *defsv; /* $_ */
127	SV *errsv;	196	SV *errsv; /* $@ */
		197	SV *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
128		200
129	/* saved global state not related to stacks */	201	#define VAR(name,type) type name;
130	U8 dowarn;	202	# include "state.h"
131	I32 in_eval;	203	#undef VAR
132		204
133	/* the stacks and related info (callchain etc..) */	205	/* statistics */
134	PERL_SI *curstackinfo;	206	int usecount; /* number of transfers to this coro */
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		207
163	/* coro process data */	208	/* coro process data */
164	int prio;	209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	SV *saved_deffh;
		214
		215	/* linked list */
		216	struct coro *next, *prev;
		217	HV *hv; /* the perl hash associated with this coro, if any */
165	};	218	};
166		219
167	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
169		222
		223	/** Coro ********************************************************************/
		224
		225	#define PRIO_MAX 3
		226	#define PRIO_HIGH 1
		227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/** lowlevel stuff **********************************************************/
		239
170	static AV *	240	static AV *
171	coro_clone_padlist (CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
172	{	242	{
173	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	244	AV *newpadlist, *newpad;
175		245
176	newpadlist = newAV ();	246	newpadlist = newAV ();
…		…
188		258
189	return newpadlist;	259	return newpadlist;
190	}	260	}
191		261
192	static void	262	static void
193	free_padlist (AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
194	{	264	{
195	/* may be during global destruction */	265	/* may be during global destruction */
196	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
197	{	267	{
198	I32 i = AvFILLp (padlist);	268	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	289	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	290	AV *av = (AV *)mg->mg_obj;
221		291
222	/* casting is fun. */	292	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	294	free_padlist (aTHX_ padlist);
225		295
226	SvREFCNT_dec (av);	296	SvREFCNT_dec (av);
227		297
228	return 0;	298	return 0;
229	}	299	}
230		300
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		302
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		304
		305	#define CORO_MAGIC(cv) \
		306	SvMAGIC (cv) \
		307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		308	? SvMAGIC (cv) \
		309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		310	: 0
		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
235	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
236	static void	339	static void
237	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
238	{	341	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
240		344
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	347	else
244	{	348	{
245	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	350	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	351	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
251	#else	355	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	357	#endif
254	}	358	}
255	}	359	}
256		360
257	static void	361	static void
258	put_padlist (CV *cv)	362	put_padlist (pTHX_ CV *cv)
259	{	363	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
261		366
262	if (!mg)	367	if (!mg)
263	{	368	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
268	}	373	}
269		374
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
271	}
272		376
273	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
274	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
275		379
276	#define LOAD(state) load_state((state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	#define SAVE(state,flags) save_state((state),(flags));	381	}
278		382
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/** load & save, init *******************************************************/
280		384
281	static void	385	static void
282	load_state(Coro__State c)	386	load_perl (pTHX_ Coro__State c)
283	{	387	{
284	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
286		391
287	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
288	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
289	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
290	PL_stack_sp = c->stack_sp;	395	GvSV (irsgv) = c->irssv_sv;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321		396
322	{	397	{
323	dSP;	398	dSP;
324	CV *cv;	399	CV *cv;
325		400
326	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
328	{	403	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
335	}	406	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	407	}
339		408
340	PUTBACK;	409	PUTBACK;
341	}	410	}
342	}	411	}
343		412
344	static void	413	static void
345	save_state(Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
346	{	415	{
347	{	416	{
348	dSP;	417	dSP;
349	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	422	/*
354	* the worst thing you can imagine happens first - we have to save	423	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
356	*/	425	*/
357		426
358	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
360	for (;;)	429	for (;;)
361	{	430	{
362	while (cxix >= 0)	431	while (cxix >= 0)
363	{	432	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
365		434
366	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	436	{
368	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
369	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
370	{	440	{
371	EXTEND (SP, CvDEPTH(cv)*2);	441	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
382		445
		446	CvDEPTH (cv) = 0;
383	get_padlist (cv);	447	get_padlist (aTHX_ cv);
384	}	448	}
385	}	449	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	450	}
395		451
396	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
397	break;	453	break;
398		454
399	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
402	}	458	}
403		459
404	PUTBACK;	460	PUTBACK;
405	}	461	}
406		462
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
410		467
411	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	469	# include "state.h"
413		470	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	471	}
445		472
446	/*	473	/*
447	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
451	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
452	static void	482	static void
453	coro_init_stacks ()	483	coro_init_stacks (pTHX)
454	{	484	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	485	PL_curstackinfo = new_stackinfo(64, 6);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		489
460	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		493
464	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
465	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	497	PL_tmps_max = 64;
468		498
469	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
472		502
…		…
476		506
477	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
478	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
480		510
481	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	513	PL_savestack_max = 64;
484		514
485	#if !PERL_VERSION_ATLEAST (5,9,0)	515	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	518	PL_retstack_max = 4;
489	#endif	519	#endif
490	}	520	}
		521	#endif
491		522
492	/*	523	/*
493	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
494	*/	525	*/
495	static void	526	static void
496	destroy_stacks()	527	coro_destroy_stacks (pTHX)
497	{	528	{
498	if (!IN_DESTRUCT)
499	{
500	/* is this ugly, I ask? */
501	LEAVE_SCOPE (0);
502
503	/* sure it is, but more important: is it correct?? :/ */
504	FREETMPS;
505
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507	}
508
509	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
511		531
512	while (PL_curstackinfo)	532	while (PL_curstackinfo)
513	{	533	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
515		535
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		538
528	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	541	PL_curstackinfo = p;
531	}	542	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	548	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	549	Safefree (PL_retstack);
539	#endif	550	#endif
540	}	551	}
541		552
542	static void	553	static size_t
543	setup_coro (struct coro *coro)	554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (*coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/** coroutine stack handling ************************************************/
		585
		586	static void
		587	coro_setup (pTHX_ struct coro *coro)
544	{	588	{
545	/*	589	/*
546	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
547	*/	591	*/
548	dTHX;	592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = newGVgen ("Coro");
		612	GvIOp(PL_defoutgv) = io;
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	}
		617
		618	{
		619	dSP;
		620	LOGOP myop;
		621
		622	Zero (&myop, 1, LOGOP);
		623	myop.op_next = Nullop;
		624	myop.op_flags = OPf_WANT_VOID;
		625
		626	PUSHMARK (SP);
		627	XPUSHs (av_shift (GvAV (PL_defgv)));
		628	PUTBACK;
		629	PL_op = (OP *)&myop;
		630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		631	SPAGAIN;
		632	}
		633
		634	ENTER; /* necessary e.g. for dounwind */
		635	}
		636
		637	static void
		638	coro_destroy (pTHX_ struct coro *coro)
		639	{
		640	if (!IN_DESTRUCT)
		641	{
		642	/* restore all saved variables and stuff */
		643	LEAVE_SCOPE (0);
		644	assert (PL_tmps_floor == -1);
		645
		646	/* free all temporaries */
		647	FREETMPS;
		648	assert (PL_tmps_ix == -1);
		649
		650	/* unwind all extra stacks */
		651	POPSTACK_TO (PL_mainstack);
		652
		653	/* unwind main stack */
		654	dounwind (-1);
		655	}
		656
		657	SvREFCNT_dec (GvSV (PL_defgv));
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	SvREFCNT_dec (GvSV (PL_errgv));
		660	SvREFCNT_dec (PL_defoutgv);
		661	SvREFCNT_dec (PL_rs);
		662	SvREFCNT_dec (GvSV (irsgv));
		663
		664	SvREFCNT_dec (coro->saved_deffh);
		665	//SvREFCNT_dec (coro->throw);
		666
		667	coro_destroy_stacks (aTHX);
		668	}
		669
		670	static void
		671	free_coro_mortal (pTHX)
		672	{
		673	if (coro_mortal)
		674	{
		675	SvREFCNT_dec (coro_mortal);
		676	coro_mortal = 0;
		677	}
		678	}
		679
		680	static int
		681	runops_trace (pTHX)
		682	{
		683	COP *oldcop = 0;
		684	int oldcxix = -2;
		685	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		686	coro_cctx *cctx = coro->cctx;
		687
		688	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		689	{
		690	PERL_ASYNC_CHECK ();
		691
		692	if (cctx->flags & CC_TRACE_ALL)
		693	{
		694	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		695	{
		696	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		697	SV **bot, **top;
		698	AV *av = newAV (); /* return values */
		699	SV **cb;
		700	dSP;
		701
		702	GV *gv = CvGV (cx->blk_sub.cv);
		703	SV *fullname = sv_2mortal (newSV (0));
		704	if (isGV (gv))
		705	gv_efullname3 (fullname, gv, 0);
		706
		707	bot = PL_stack_base + cx->blk_oldsp + 1;
		708	top = cx->blk_gimme == G_ARRAY ? SP + 1
		709	: cx->blk_gimme == G_SCALAR ? bot + 1
		710	: bot;
		711
		712	while (bot < top)
		713	av_push (av, SvREFCNT_inc (*bot++));
		714
		715	PL_runops = RUNOPS_DEFAULT;
		716	ENTER;
		717	SAVETMPS;
		718	EXTEND (SP, 3);
		719	PUSHMARK (SP);
		720	PUSHs (&PL_sv_no);
		721	PUSHs (fullname);
		722	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		723	PUTBACK;
		724	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		725	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		726	SPAGAIN;
		727	FREETMPS;
		728	LEAVE;
		729	PL_runops = runops_trace;
		730	}
		731
		732	if (oldcop != PL_curcop)
		733	{
		734	oldcop = PL_curcop;
		735
		736	if (PL_curcop != &PL_compiling)
		737	{
		738	SV **cb;
		739
		740	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		741	{
		742	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		743
		744	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		745	{
		746	runops_proc_t old_runops = PL_runops;
		747	dSP;
		748	GV *gv = CvGV (cx->blk_sub.cv);
		749	SV *fullname = sv_2mortal (newSV (0));
		750
		751	if (isGV (gv))
		752	gv_efullname3 (fullname, gv, 0);
		753
		754	PL_runops = RUNOPS_DEFAULT;
		755	ENTER;
		756	SAVETMPS;
		757	EXTEND (SP, 3);
		758	PUSHMARK (SP);
		759	PUSHs (&PL_sv_yes);
		760	PUSHs (fullname);
		761	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		762	PUTBACK;
		763	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		764	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		765	SPAGAIN;
		766	FREETMPS;
		767	LEAVE;
		768	PL_runops = runops_trace;
		769	}
		770
		771	oldcxix = cxstack_ix;
		772	}
		773
		774	if (cctx->flags & CC_TRACE_LINE)
		775	{
		776	dSP;
		777
		778	PL_runops = RUNOPS_DEFAULT;
		779	ENTER;
		780	SAVETMPS;
		781	EXTEND (SP, 3);
		782	PL_runops = RUNOPS_DEFAULT;
		783	PUSHMARK (SP);
		784	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		785	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		786	PUTBACK;
		787	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		788	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		789	SPAGAIN;
		790	FREETMPS;
		791	LEAVE;
		792	PL_runops = runops_trace;
		793	}
		794	}
		795	}
		796	}
		797	}
		798
		799	TAINT_NOT;
		800	return 0;
		801	}
		802
		803	/* inject a fake call to Coro::State::_cctx_init into the execution */
		804	/* _cctx_init should be careful, as it could be called at almost any time */
		805	/* during execution of a perl program */
		806	static void NOINLINE
		807	prepare_cctx (pTHX_ coro_cctx *cctx)
		808	{
549	dSP;	809	dSP;
550	UNOP myop;	810	LOGOP myop;
551	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552		811
553	coro_init_stacks ();	812	PL_top_env = &PL_start_env;
554	/*PL_curcop = 0;*/
555	/*PL_in_eval = PL_in_eval;*/ /* inherit */
556	SvREFCNT_dec (GvAV (PL_defgv));
557	GvAV (PL_defgv) = coro->args; coro->args = 0;
558		813
559	SPAGAIN;	814	if (cctx->flags & CC_TRACE)
		815	PL_runops = runops_trace;
560		816
561	Zero (&myop, 1, UNOP);	817	Zero (&myop, 1, LOGOP);
562	myop.op_next = Nullop;	818	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID;	819	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564		820
		821	PUSHMARK (SP);
		822	EXTEND (SP, 2);
		823	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		824	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		825	PUTBACK;
565	PL_op = (OP *)&myop;	826	PL_op = (OP *)&myop;
566
567	PUSHMARK(SP);
568	XPUSHs (sub_init);
569	PUTBACK;
570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	827	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571	SPAGAIN;	828	SPAGAIN;
572
573	ENTER; /* necessary e.g. for dounwind */
574	}	829	}
575		830
		831	/*
		832	* this is a _very_ stripped down perl interpreter ;)
		833	*/
576	static void	834	static void
577	free_coro_mortal ()	835	coro_run (void *arg)
578	{	836	{
579	if (coro_mortal)	837	dTHX;
580	{	838
581	SvREFCNT_dec (coro_mortal);	839	/* coro_run is the alternative tail of transfer(), so unlock here. */
582	coro_mortal = 0;	840	UNLOCK;
		841
		842	/* we now skip the entersub that lead to transfer() */
		843	PL_op = PL_op->op_next;
		844
		845	/* inject a fake subroutine call to cctx_init */
		846	prepare_cctx (aTHX_ (coro_cctx *)arg);
		847
		848	/* somebody or something will hit me for both perl_run and PL_restartop */
		849	PL_restartop = PL_op;
		850	perl_run (PL_curinterp);
		851
		852	/*
		853	* If perl-run returns we assume exit() was being called or the coro
		854	* fell off the end, which seems to be the only valid (non-bug)
		855	* reason for perl_run to return. We try to exit by jumping to the
		856	* bootstrap-time "top" top_env, as we cannot restore the "main"
		857	* coroutine as Coro has no such concept
		858	*/
		859	PL_top_env = main_top_env;
		860	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		861	}
		862
		863	static coro_cctx *
		864	cctx_new ()
		865	{
		866	coro_cctx *cctx;
		867	void *stack_start;
		868	size_t stack_size;
		869
		870	++cctx_count;
		871
		872	Newz (0, cctx, 1, coro_cctx);
		873
		874	#if HAVE_MMAP
		875
		876	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		877	/* mmap supposedly does allocate-on-write for us */
		878	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		879
		880	if (cctx->sptr != (void *)-1)
583	}	881	{
		882	# if CORO_STACKGUARD
		883	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		884	# endif
		885	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		886	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		887	cctx->flags |= CC_MAPPED;
		888	}
		889	else
		890	#endif
		891	{
		892	cctx->ssize = coro_stacksize * (long)sizeof (long);
		893	New (0, cctx->sptr, coro_stacksize, long);
		894
		895	if (!cctx->sptr)
		896	{
		897	perror ("FATAL: unable to allocate stack for coroutine");
		898	_exit (EXIT_FAILURE);
		899	}
		900
		901	stack_start = cctx->sptr;
		902	stack_size = cctx->ssize;
		903	}
		904
		905	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		906	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		907
		908	return cctx;
584	}	909	}
		910
		911	static void
		912	cctx_destroy (coro_cctx *cctx)
		913	{
		914	if (!cctx)
		915	return;
		916
		917	--cctx_count;
		918
		919	#if CORO_USE_VALGRIND
		920	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		921	#endif
		922
		923	#if HAVE_MMAP
		924	if (cctx->flags & CC_MAPPED)
		925	munmap (cctx->sptr, cctx->ssize);
		926	else
		927	#endif
		928	Safefree (cctx->sptr);
		929
		930	Safefree (cctx);
		931	}
		932
		933	static coro_cctx *
		934	cctx_get (pTHX)
		935	{
		936	while (cctx_first)
		937	{
		938	coro_cctx *cctx = cctx_first;
		939	cctx_first = cctx->next;
		940	--cctx_idle;
		941
		942	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		943	return cctx;
		944
		945	cctx_destroy (cctx);
		946	}
		947
		948	return cctx_new ();
		949	}
		950
		951	static void
		952	cctx_put (coro_cctx *cctx)
		953	{
		954	/* free another cctx if overlimit */
		955	if (cctx_idle >= MAX_IDLE_CCTX)
		956	{
		957	coro_cctx *first = cctx_first;
		958	cctx_first = first->next;
		959	--cctx_idle;
		960
		961	cctx_destroy (first);
		962	}
		963
		964	++cctx_idle;
		965	cctx->next = cctx_first;
		966	cctx_first = cctx;
		967	}
		968
		969	/** coroutine switching *****************************************************/
585		970
586	static void NOINLINE	971	static void NOINLINE
587	prepare_cctx (coro_stack *cctx)	972	transfer_check (pTHX_ struct coro *prev, struct coro *next)
588	{	973	{
589	dSP;	974	if (prev != next)
590	UNOP myop;
591
592	Zero (&myop, 1, UNOP);
593	myop.op_next = PL_op;
594	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596	PUSHMARK(SP);
597	EXTEND (SP, 2);
598	PUSHs (newSViv (PTR2IV (cctx)));
599	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600	PUTBACK;
601	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602	SPAGAIN;
603	}
604
605	static void
606	coro_run (void *arg)
607	{
608	/*
609	* this is a _very_ stripped down perl interpreter ;)
610	*/
611	UNLOCK;
612
613	PL_top_env = &PL_start_env;
614	prepare_cctx ((coro_stack *)arg);
615
616	/* somebody will hit me for both perl_run and PL_restartop */
617	perl_run (PERL_GET_CONTEXT);
618
619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620	abort ();
621	}
622
623	static coro_stack *
624	stack_new ()
625	{
626	coro_stack *stack;
627
628	New (0, stack, 1, coro_stack);
629
630	#if HAVE_MMAP
631
632	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633	/* mmap suppsedly does allocate-on-write for us */
634	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636	if (stack->sptr == (void *)-1)
637	{
638	perror ("FATAL: unable to mmap stack for coroutine");
639	_exit (EXIT_FAILURE);
640	}
641
642	# if STACKGUARD
643	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644	# endif
645
646	#else
647
648	stack->ssize = STACKSIZE * (long)sizeof (long);
649	New (0, stack->sptr, STACKSIZE, long);
650
651	if (!stack->sptr)
652	{
653	perror (stderr, "FATAL: unable to malloc stack for coroutine");
654	_exit (EXIT_FAILURE);
655	}
656
657	#endif
658
659	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661	return stack;
662	}
663
664	static void
665	stack_free (coro_stack *stack)
666	{
667	if (!stack)
668	return;
669
670	#if HAVE_MMAP
671	munmap (stack->sptr, stack->ssize);
672	#else
673	Safefree (stack->sptr);
674	#endif
675
676	Safefree (stack);
677	}
678
679	static coro_stack *stack_first;
680
681	static coro_stack *
682	stack_get ()
683	{
684	coro_stack *stack;
685
686	if (stack_first)
687	{
688	stack = stack_first;
689	stack_first = stack->next;
690	}
691	else
692	{	975	{
693	stack = stack_new ();	976	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
694	PL_op = PL_op->op_next;	977	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		978
		979	if (next->flags & CF_RUNNING)
		980	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		981
		982	if (next->flags & CF_DESTROYED)
		983	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		984
		985	if (PL_lex_state != LEX_NOTPARSING)
		986	croak ("Coro::State::transfer called while parsing, but this is not supported");
695	}	987	}
696
697	return stack;
698	}	988	}
699		989
700	static void	990	/* always use the TRANSFER macro */
701	stack_put (coro_stack *stack)
702	{
703	stack->next = stack_first;
704	stack_first = stack;
705	}
706
707	/* never call directly, always through the coro_state_transfer global variable */
708	static void NOINLINE	991	static void NOINLINE
709	transfer (struct coro *prev, struct coro *next, int flags)	992	transfer (pTHX_ struct coro *prev, struct coro *next)
710	{	993	{
711	dSTACKLEVEL;	994	dSTACKLEVEL;
712		995
713	/* sometimes transfer is only called to set idle_sp */	996	/* sometimes transfer is only called to set idle_sp */
714	if (flags == TRANSFER_SET_STACKLEVEL)	997	if (!next)
		998	{
715	((coro_stack *)prev)->idle_sp = STACKLEVEL;	999	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1000	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1001	}
716	else if (prev != next)	1002	else if (prev != next)
717	{	1003	{
718	coro_stack *prev__stack;	1004	coro_cctx *prev__cctx;
		1005
		1006	if (prev->flags & CF_NEW)
		1007	{
		1008	/* create a new empty context */
		1009	Newz (0, prev->cctx, 1, coro_cctx);
		1010	prev->flags &= ~CF_NEW;
		1011	prev->flags |= CF_RUNNING;
		1012	}
		1013
		1014	prev->flags &= ~CF_RUNNING;
		1015	next->flags |= CF_RUNNING;
719		1016
720	LOCK;	1017	LOCK;
721		1018
722	if (next->mainstack)	1019	if (next->flags & CF_NEW)
723	{	1020	{
724	/* coroutine already started */	1021	/* need to start coroutine */
725	SAVE (prev, flags);	1022	next->flags &= ~CF_NEW;
726	LOAD (next);	1023	/* first get rid of the old state */
		1024	save_perl (aTHX_ prev);
		1025	/* setup coroutine call */
		1026	coro_setup (aTHX_ next);
727	}	1027	}
728	else	1028	else
729	{	1029	{
730	/* need to start coroutine */	1030	/* coroutine already started */
731	/* first get rid of the old state */	1031	save_perl (aTHX_ prev);
732	SAVE (prev, -1);	1032	load_perl (aTHX_ next);
733	/* setup coroutine call */
734	setup_coro (next);
735	/* need a stack */
736	next->stack = 0;
737	}	1033	}
738		1034
739	if (!prev->stack)
740	/* create a new empty context */
741	Newz (0, prev->stack, 1, coro_stack);
742
743	prev__stack = prev->stack;	1035	prev__cctx = prev->cctx;
744		1036
745	/* possibly "free" the stack */	1037	/* possibly "free" the cctx */
746	if (prev__stack->idle_sp == STACKLEVEL)	1038	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
747	{	1039	{
748	stack_put (prev__stack);	1040	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1041	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1042
749	prev->stack = 0;	1043	prev->cctx = 0;
		1044
		1045	cctx_put (prev__cctx);
750	}	1046	}
751		1047
		1048	++next->usecount;
		1049
752	if (!next->stack)	1050	if (!next->cctx)
753	next->stack = stack_get ();	1051	next->cctx = cctx_get (aTHX);
754		1052
755	if (prev__stack != next->stack)	1053	if (prev__cctx != next->cctx)
756	{	1054	{
757	prev__stack->top_env = PL_top_env;	1055	prev__cctx->top_env = PL_top_env;
758	PL_top_env = next->stack->top_env;	1056	PL_top_env = next->cctx->top_env;
759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1057	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
760	}	1058	}
761		1059
762	free_coro_mortal ();	1060	free_coro_mortal (aTHX);
763
764	UNLOCK;	1061	UNLOCK;
765	}	1062	}
766	}	1063	}
767		1064
768	struct transfer_args	1065	struct transfer_args
769	{	1066	{
770	struct coro *prev, *next;	1067	struct coro *prev, *next;
771	int flags;
772	};	1068	};
773		1069
774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1070	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1071	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
775		1072
		1073	/** high level stuff ********************************************************/
		1074
776	static void	1075	static int
777	coro_state_destroy (struct coro *coro)	1076	coro_state_destroy (pTHX_ struct coro *coro)
778	{	1077	{
779	if (coro->refcnt--)	1078	if (coro->flags & CF_DESTROYED)
780	return;	1079	return 0;
		1080
		1081	coro->flags |= CF_DESTROYED;
		1082
		1083	if (coro->flags & CF_READY)
		1084	{
		1085	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1086	/* alternative: look through all ready queues and remove the coro */
		1087	LOCK;
		1088	--coro_nready;
		1089	UNLOCK;
		1090	}
		1091	else
		1092	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
781		1093
782	if (coro->mainstack && coro->mainstack != main_mainstack)	1094	if (coro->mainstack && coro->mainstack != main_mainstack)
783	{	1095	{
784	struct coro temp;	1096	struct coro temp;
785		1097
786	SAVE ((&temp), TRANSFER_SAVE_ALL);	1098	if (coro->flags & CF_RUNNING)
787	LOAD (coro);	1099	croak ("FATAL: tried to destroy currently running coroutine");
788		1100
789	destroy_stacks ();	1101	save_perl (aTHX_ &temp);
		1102	load_perl (aTHX_ coro);
790		1103
		1104	coro_destroy (aTHX_ coro);
		1105
791	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1106	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
792		1107
793	coro->mainstack = 0;	1108	coro->mainstack = 0;
794	}	1109	}
795		1110
796	stack_free (coro->stack);	1111	cctx_destroy (coro->cctx);
797	SvREFCNT_dec (coro->args);	1112	SvREFCNT_dec (coro->args);
798	Safefree (coro);	1113
		1114	if (coro->next) coro->next->prev = coro->prev;
		1115	if (coro->prev) coro->prev->next = coro->next;
		1116	if (coro == coro_first) coro_first = coro->next;
		1117
		1118	return 1;
799	}	1119	}
800		1120
801	static int	1121	static int
802	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1122	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
803	{	1123	{
804	struct coro *coro = (struct coro *)mg->mg_ptr;	1124	struct coro *coro = (struct coro *)mg->mg_ptr;
805	mg->mg_ptr = 0;	1125	mg->mg_ptr = 0;
806		1126
		1127	coro->hv = 0;
		1128
		1129	if (--coro->refcnt < 0)
		1130	{
807	coro_state_destroy (coro);	1131	coro_state_destroy (aTHX_ coro);
		1132	Safefree (coro);
		1133	}
808		1134
809	return 0;	1135	return 0;
810	}	1136	}
811		1137
812	static int	1138	static int
…		…
819	return 0;	1145	return 0;
820	}	1146	}
821		1147
822	static MGVTBL coro_state_vtbl = {	1148	static MGVTBL coro_state_vtbl = {
823	0, 0, 0, 0,	1149	0, 0, 0, 0,
824	coro_state_clear,	1150	coro_state_free,
825	0,	1151	0,
826	#ifdef MGf_DUP	1152	#ifdef MGf_DUP
827	coro_state_dup,	1153	coro_state_dup,
		1154	#else
		1155	# define MGf_DUP 0
828	#endif	1156	#endif
829	};	1157	};
830		1158
831	static struct coro *
832	SvSTATE (SV *coro)
833	{
834	HV *stash;
835	MAGIC *mg;
836
837	if (SvROK (coro))
838	coro = SvRV (coro);
839
840	stash = SvSTASH (coro);
841	if (stash != coro_stash && stash != coro_state_stash)
842	{
843	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");
846	}
847
848	mg = SvMAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;
851	}
852
853	static void	1159	static void
854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1160	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855	{	1161	{
856	ta->prev = SvSTATE (prev);	1162	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1163	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;	1164	TRANSFER_CHECK (*ta);
859	}	1165	}
860		1166
861	static void	1167	static void
862	api_transfer (SV *prev, SV *next, int flags)	1168	api_transfer (SV *prev_sv, SV *next_sv)
863	{	1169	{
864	dTHX;	1170	dTHX;
865	struct transfer_args ta;	1171	struct transfer_args ta;
866		1172
867	prepare_transfer (&ta, prev, next, flags);	1173	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1174	TRANSFER (ta);
869	}	1175	}
870		1176
871	/** Coro ********************************************************************/	1177	/** Coro ********************************************************************/
872		1178
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1179	static void
886	coro_enq (SV *sv)	1180	coro_enq (pTHX_ SV *coro_sv)
887	{	1181	{
888	int prio;
889
890	if (SvTYPE (sv) != SVt_PVHV)
891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893	prio = SvSTATE (sv)->prio;
894
895	av_push (coro_ready [prio - PRIO_MIN], sv);	1182	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	1183	}
898		1184
899	static SV *	1185	static SV *
900	coro_deq (int min_prio)	1186	coro_deq (pTHX_ int min_prio)
901	{	1187	{
902	int prio = PRIO_MAX - PRIO_MIN;	1188	int prio = PRIO_MAX - PRIO_MIN;
903		1189
904	min_prio -= PRIO_MIN;	1190	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	1191	if (min_prio < 0)
906	min_prio = 0;	1192	min_prio = 0;
907		1193
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1194	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1195	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1196	return av_shift (coro_ready [prio]);
913	}
914		1197
915	return 0;	1198	return 0;
916	}	1199	}
917		1200
918	static void	1201	static int
919	api_ready (SV *coro)	1202	api_ready (SV *coro_sv)
920	{	1203	{
921	dTHX;	1204	dTHX;
		1205	struct coro *coro;
922		1206
923	if (SvROK (coro))	1207	if (SvROK (coro_sv))
924	coro = SvRV (coro);	1208	coro_sv = SvRV (coro_sv);
		1209
		1210	coro = SvSTATE (coro_sv);
		1211
		1212	if (coro->flags & CF_READY)
		1213	return 0;
		1214
		1215	coro->flags |= CF_READY;
925		1216
926	LOCK;	1217	LOCK;
927	coro_enq (SvREFCNT_inc (coro));	1218	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1219	++coro_nready;
928	UNLOCK;	1220	UNLOCK;
929	}
930		1221
		1222	return 1;
		1223	}
		1224
931	static void	1225	static int
		1226	api_is_ready (SV *coro_sv)
		1227	{
		1228	dTHX;
		1229	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1230	}
		1231
		1232	static void
932	prepare_schedule (struct transfer_args *ta)	1233	prepare_schedule (pTHX_ struct transfer_args *ta)
933	{	1234	{
934	SV *current, *prev, *next;	1235	SV *prev_sv, *next_sv;
935
936	current = GvSV (coro_current);
937		1236
938	for (;;)	1237	for (;;)
939	{	1238	{
940	LOCK;	1239	LOCK;
941	next = coro_deq (PRIO_MIN);	1240	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1241
		1242	/* nothing to schedule: call the idle handler */
		1243	if (!next_sv)
		1244	{
		1245	dSP;
		1246	UNLOCK;
		1247
		1248	ENTER;
		1249	SAVETMPS;
		1250
		1251	PUSHMARK (SP);
		1252	PUTBACK;
		1253	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1254
		1255	FREETMPS;
		1256	LEAVE;
		1257	continue;
		1258	}
		1259
		1260	ta->next = SvSTATE (next_sv);
		1261
		1262	/* cannot transfer to destroyed coros, skip and look for next */
		1263	if (ta->next->flags & CF_DESTROYED)
		1264	{
		1265	UNLOCK;
		1266	SvREFCNT_dec (next_sv);
		1267	/* coro_nready is already taken care of by destroy */
		1268	continue;
		1269	}
		1270
		1271	--coro_nready;
942	UNLOCK;	1272	UNLOCK;
943
944	if (next)
945	break;	1273	break;
946
947	{
948	dSP;
949
950	ENTER;
951	SAVETMPS;
952
953	PUSHMARK (SP);
954	PUTBACK;
955	call_sv (GvSV (coro_idle), G_DISCARD);
956
957	FREETMPS;
958	LEAVE;
959	}	1274	}
960	}
961
962	prev = SvRV (current);
963	SvRV (current) = next;
964		1275
965	/* free this only after the transfer */	1276	/* free this only after the transfer */
		1277	prev_sv = SvRV (coro_current);
		1278	ta->prev = SvSTATE (prev_sv);
		1279	TRANSFER_CHECK (*ta);
		1280	assert (ta->next->flags & CF_READY);
		1281	ta->next->flags &= ~CF_READY;
		1282	SvRV_set (coro_current, next_sv);
		1283
966	LOCK;	1284	LOCK;
967	free_coro_mortal ();	1285	free_coro_mortal (aTHX);
		1286	coro_mortal = prev_sv;
968	UNLOCK;	1287	UNLOCK;
969	coro_mortal = prev;
970
971	ta->prev = SvSTATE (prev);
972	ta->next = SvSTATE (next);
973	ta->flags = TRANSFER_SAVE_ALL;
974	}	1288	}
975		1289
976	static void	1290	static void
977	prepare_cede (struct transfer_args *ta)	1291	prepare_cede (pTHX_ struct transfer_args *ta)
978	{	1292	{
979	LOCK;	1293	api_ready (coro_current);
980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981	UNLOCK;
982
983	prepare_schedule (ta);	1294	prepare_schedule (aTHX_ ta);
		1295	}
		1296
		1297	static int
		1298	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1299	{
		1300	if (coro_nready)
		1301	{
		1302	SV *prev = SvRV (coro_current);
		1303	prepare_schedule (aTHX_ ta);
		1304	api_ready (prev);
		1305	return 1;
		1306	}
		1307	else
		1308	return 0;
984	}	1309	}
985		1310
986	static void	1311	static void
987	api_schedule (void)	1312	api_schedule (void)
988	{	1313	{
989	dTHX;	1314	dTHX;
990	struct transfer_args ta;	1315	struct transfer_args ta;
991		1316
992	prepare_schedule (&ta);	1317	prepare_schedule (aTHX_ &ta);
993	TRANSFER (ta);	1318	TRANSFER (ta);
994	}	1319	}
995		1320
996	static void	1321	static int
997	api_cede (void)	1322	api_cede (void)
998	{	1323	{
999	dTHX;	1324	dTHX;
1000	struct transfer_args ta;	1325	struct transfer_args ta;
1001		1326
1002	prepare_cede (&ta);	1327	prepare_cede (aTHX_ &ta);
		1328
		1329	if (ta.prev != ta.next)
		1330	{
1003	TRANSFER (ta);	1331	TRANSFER (ta);
		1332	return 1;
		1333	}
		1334	else
		1335	return 0;
1004	}	1336	}
1005		1337
		1338	static int
		1339	api_cede_notself (void)
		1340	{
		1341	dTHX;
		1342	struct transfer_args ta;
		1343
		1344	if (prepare_cede_notself (aTHX_ &ta))
		1345	{
		1346	TRANSFER (ta);
		1347	return 1;
		1348	}
		1349	else
		1350	return 0;
		1351	}
		1352
		1353	static void
		1354	api_trace (SV *coro_sv, int flags)
		1355	{
		1356	dTHX;
		1357	struct coro *coro = SvSTATE (coro_sv);
		1358
		1359	if (flags & CC_TRACE)
		1360	{
		1361	if (!coro->cctx)
		1362	coro->cctx = cctx_new ();
		1363	else if (!(coro->cctx->flags & CC_TRACE))
		1364	croak ("cannot enable tracing on coroutine with custom stack");
		1365
		1366	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1367	}
		1368	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1369	{
		1370	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1371
		1372	if (coro->flags & CF_RUNNING)
		1373	PL_runops = RUNOPS_DEFAULT;
		1374	else
		1375	coro->runops = RUNOPS_DEFAULT;
		1376	}
		1377	}
		1378
1006	MODULE = Coro::State PACKAGE = Coro::State	1379	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007		1380
1008	PROTOTYPES: DISABLE	1381	PROTOTYPES: DISABLE
1009		1382
1010	BOOT:	1383	BOOT:
1011	{	1384	{
1012	#ifdef USE_ITHREADS	1385	#ifdef USE_ITHREADS
1013	MUTEX_INIT (&coro_mutex);	1386	MUTEX_INIT (&coro_mutex);
1014	#endif	1387	#endif
1015	BOOT_PAGESIZE;	1388	BOOT_PAGESIZE;
1016		1389
		1390	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1391
1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1392	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018		1393
1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1397	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022		1398
1023	main_mainstack = PL_mainstack;	1399	main_mainstack = PL_mainstack;
		1400	main_top_env = PL_top_env;
		1401
		1402	while (main_top_env->je_prev)
		1403	main_top_env = main_top_env->je_prev;
1024		1404
1025	coroapi.ver = CORO_API_VERSION;	1405	coroapi.ver = CORO_API_VERSION;
1026	coroapi.transfer = api_transfer;	1406	coroapi.transfer = api_transfer;
1027		1407
1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1408	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1035	struct coro *coro;	1415	struct coro *coro;
1036	HV *hv;	1416	HV *hv;
1037	int i;	1417	int i;
1038		1418
1039	Newz (0, coro, 1, struct coro);	1419	Newz (0, coro, 1, struct coro);
1040	coro->args = newAV ();	1420	coro->args = newAV ();
		1421	coro->flags = CF_NEW;
1041		1422
		1423	if (coro_first) coro_first->prev = coro;
		1424	coro->next = coro_first;
		1425	coro_first = coro;
		1426
1042	hv = newHV ();	1427	coro->hv = hv = newHV ();
1043	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1428	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1044	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1429	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045		1430
1046	for (i = 1; i < items; i++)	1431	for (i = 1; i < items; i++)
1047	av_push (coro->args, newSVsv (ST (i)));	1432	av_push (coro->args, newSVsv (ST (i)));
1048
1049	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1050	/*coro->stack = 0;*/
1051	}	1433	}
1052	OUTPUT:	1434	OUTPUT:
1053	RETVAL	1435	RETVAL
1054		1436
		1437	# these not obviously related functions are all rolled into the same xs
		1438	# function to increase chances that they all will call transfer with the same
		1439	# stack offset
1055	void	1440	void
1056	_set_stacklevel (...)	1441	_set_stacklevel (...)
1057	ALIAS:	1442	ALIAS:
1058	Coro::State::transfer = 1	1443	Coro::State::transfer = 1
1059	Coro::schedule = 2	1444	Coro::schedule = 2
1060	Coro::cede = 3	1445	Coro::cede = 3
1061	Coro::Cont::yield = 4	1446	Coro::cede_notself = 4
1062	CODE:	1447	CODE:
1063	{	1448	{
1064	struct transfer_args ta;	1449	struct transfer_args ta;
1065		1450
1066	switch (ix)	1451	switch (ix)
1067	{	1452	{
1068	case 0:	1453	case 0:
1069	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1454	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1070	ta.next = 0;	1455	ta.next = 0;
1071	ta.flags = TRANSFER_SET_STACKLEVEL;
1072	break;	1456	break;
1073		1457
1074	case 1:	1458	case 1:
1075	if (items != 3)	1459	if (items != 2)
1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1460	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1077		1461
1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1462	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1079	break;	1463	break;
1080		1464
1081	case 2:	1465	case 2:
1082	prepare_schedule (&ta);	1466	prepare_schedule (aTHX_ &ta);
1083	break;	1467	break;
1084		1468
1085	case 3:	1469	case 3:
1086	prepare_cede (&ta);	1470	prepare_cede (aTHX_ &ta);
1087	break;	1471	break;
1088		1472
1089	case 4:	1473	case 4:
1090	{	1474	if (!prepare_cede_notself (aTHX_ &ta))
1091	SV *yieldstack;	1475	XSRETURN_EMPTY;
1092	SV *sv;
1093	AV *defav = GvAV (PL_defgv);
1094		1476
1095	yieldstack = *hv_fetch (
1096	(HV *)SvRV (GvSV (coro_current)),
1097	"yieldstack", sizeof ("yieldstack") - 1,
1098	0
1099	);
1100
1101	/* set up @_ -- ugly */
1102	av_clear (defav);
1103	av_fill (defav, items - 1);
1104	while (items--)
1105	av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107	sv = av_pop ((AV *)SvRV (yieldstack));
1108	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110	ta.flags = 0;
1111	SvREFCNT_dec (sv);
1112	}
1113	break;	1477	break;
1114
1115	}	1478	}
1116		1479
		1480	BARRIER;
1117	TRANSFER (ta);	1481	TRANSFER (ta);
1118	}
1119		1482
1120	void	1483	if (GIMME_V != G_VOID && ta.next != ta.prev)
1121	_clone_state_from (SV *dst, SV *src)	1484	XSRETURN_YES;
		1485	}
		1486
		1487	bool
		1488	_destroy (SV *coro_sv)
1122	CODE:	1489	CODE:
1123	{	1490	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1124	struct coro *coro_src = SvSTATE (src);	1491	OUTPUT:
1125		1492	RETVAL
1126	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128	++coro_src->refcnt;
1129	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1130	}
1131		1493
1132	void	1494	void
1133	_exit (code)	1495	_exit (code)
1134	int code	1496	int code
1135	PROTOTYPE: $	1497	PROTOTYPE: $
1136	CODE:	1498	CODE:
1137	_exit (code);	1499	_exit (code);
1138		1500
		1501	int
		1502	cctx_stacksize (int new_stacksize = 0)
		1503	CODE:
		1504	RETVAL = coro_stacksize;
		1505	if (new_stacksize)
		1506	coro_stacksize = new_stacksize;
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	cctx_count ()
		1512	CODE:
		1513	RETVAL = cctx_count;
		1514	OUTPUT:
		1515	RETVAL
		1516
		1517	int
		1518	cctx_idle ()
		1519	CODE:
		1520	RETVAL = cctx_idle;
		1521	OUTPUT:
		1522	RETVAL
		1523
		1524	void
		1525	list ()
		1526	PPCODE:
		1527	{
		1528	struct coro *coro;
		1529	for (coro = coro_first; coro; coro = coro->next)
		1530	if (coro->hv)
		1531	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1532	}
		1533
		1534	void
		1535	call (Coro::State coro, SV *coderef)
		1536	ALIAS:
		1537	eval = 1
		1538	CODE:
		1539	{
		1540	if (coro->mainstack)
		1541	{
		1542	struct coro temp;
		1543	Zero (&temp, 1, struct coro);
		1544
		1545	if (!(coro->flags & CF_RUNNING))
		1546	{
		1547	save_perl (aTHX_ &temp);
		1548	load_perl (aTHX_ coro);
		1549	}
		1550
		1551	{
		1552	dSP;
		1553	ENTER;
		1554	SAVETMPS;
		1555	PUSHMARK (SP);
		1556	PUTBACK;
		1557	if (ix)
		1558	eval_sv (coderef, 0);
		1559	else
		1560	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1561	SPAGAIN;
		1562	FREETMPS;
		1563	LEAVE;
		1564	PUTBACK;
		1565	}
		1566
		1567	if (!(coro->flags & CF_RUNNING))
		1568	{
		1569	save_perl (aTHX_ coro);
		1570	load_perl (aTHX_ &temp);
		1571	}
		1572	}
		1573	}
		1574
		1575	SV *
		1576	is_ready (Coro::State coro)
		1577	PROTOTYPE: $
		1578	ALIAS:
		1579	is_ready = CF_READY
		1580	is_running = CF_RUNNING
		1581	is_new = CF_NEW
		1582	is_destroyed = CF_DESTROYED
		1583	CODE:
		1584	RETVAL = boolSV (coro->flags & ix);
		1585	OUTPUT:
		1586	RETVAL
		1587
		1588	void
		1589	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1590
		1591	SV *
		1592	has_stack (Coro::State coro)
		1593	PROTOTYPE: $
		1594	CODE:
		1595	RETVAL = boolSV (!!coro->cctx);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	int
		1600	is_traced (Coro::State coro)
		1601	PROTOTYPE: $
		1602	CODE:
		1603	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1604	OUTPUT:
		1605	RETVAL
		1606
		1607	IV
		1608	rss (Coro::State coro)
		1609	PROTOTYPE: $
		1610	ALIAS:
		1611	usecount = 1
		1612	CODE:
		1613	switch (ix)
		1614	{
		1615	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1616	case 1: RETVAL = coro->usecount; break;
		1617	}
		1618	OUTPUT:
		1619	RETVAL
		1620
		1621
1139	MODULE = Coro::State PACKAGE = Coro	1622	MODULE = Coro::State PACKAGE = Coro
1140		1623
1141	BOOT:	1624	BOOT:
1142	{	1625	{
1143	int i;	1626	int i;
		1627
		1628	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1629	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1630	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1631
		1632	coro_current = get_sv ("Coro::current", FALSE);
		1633	SvREADONLY_on (coro_current);
1144		1634
1145	coro_stash = gv_stashpv ("Coro", TRUE);	1635	coro_stash = gv_stashpv ("Coro", TRUE);
1146		1636
1147	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1637	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1638	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1639	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1640	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1641	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1642	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153		1643
1154	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1644	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158	coro_ready[i] = newAV ();	1645	coro_ready[i] = newAV ();
1159		1646
1160	{	1647	{
1161	SV *sv = perl_get_sv("Coro::API", 1);	1648	SV *sv = perl_get_sv("Coro::API", 1);
1162		1649
1163	coroapi.schedule = api_schedule;	1650	coroapi.schedule = api_schedule;
1164	coroapi.cede = api_cede;	1651	coroapi.cede = api_cede;
		1652	coroapi.cede_notself = api_cede_notself;
1165	coroapi.ready = api_ready;	1653	coroapi.ready = api_ready;
		1654	coroapi.is_ready = api_is_ready;
1166	coroapi.nready = &coro_nready;	1655	coroapi.nready = &coro_nready;
1167	coroapi.current = coro_current;	1656	coroapi.current = coro_current;
1168		1657
1169	GCoroAPI = &coroapi;	1658	GCoroAPI = &coroapi;
1170	sv_setiv (sv, (IV)&coroapi);	1659	sv_setiv (sv, (IV)&coroapi);
1171	SvREADONLY_on (sv);	1660	SvREADONLY_on (sv);
1172	}	1661	}
1173	}	1662	}
		1663
		1664	void
		1665	_set_current (SV *current)
		1666	PROTOTYPE: $
		1667	CODE:
		1668	SvREFCNT_dec (SvRV (coro_current));
		1669	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1174		1670
1175	int	1671	int
1176	prio (Coro::State coro, int newprio = 0)	1672	prio (Coro::State coro, int newprio = 0)
1177	ALIAS:	1673	ALIAS:
1178	nice = 1	1674	nice = 1
…		…
1181	RETVAL = coro->prio;	1677	RETVAL = coro->prio;
1182		1678
1183	if (items > 1)	1679	if (items > 1)
1184	{	1680	{
1185	if (ix)	1681	if (ix)
1186	newprio += coro->prio;	1682	newprio = coro->prio - newprio;
1187		1683
1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1684	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1685	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190		1686
1191	coro->prio = newprio;	1687	coro->prio = newprio;
1192	}	1688	}
1193	}	1689	}
		1690	OUTPUT:
		1691	RETVAL
1194		1692
1195	void	1693	SV *
1196	ready (SV *self)	1694	ready (SV *self)
1197	PROTOTYPE: $	1695	PROTOTYPE: $
1198	CODE:	1696	CODE:
1199	api_ready (self);	1697	RETVAL = boolSV (api_ready (self));
		1698	OUTPUT:
		1699	RETVAL
1200		1700
1201	int	1701	int
1202	nready (...)	1702	nready (...)
1203	PROTOTYPE:	1703	PROTOTYPE:
1204	CODE:	1704	CODE:
1205	RETVAL = coro_nready;	1705	RETVAL = coro_nready;
1206	OUTPUT:	1706	OUTPUT:
1207	RETVAL	1707	RETVAL
1208		1708
		1709	# for async_pool speedup
		1710	void
		1711	_pool_1 (SV *cb)
		1712	CODE:
		1713	{
		1714	struct coro *coro = SvSTATE (coro_current);
		1715	HV *hv = (HV *)SvRV (coro_current);
		1716	AV *defav = GvAV (PL_defgv);
		1717	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1718	AV *invoke_av;
		1719	int i, len;
		1720
		1721	if (!invoke)
		1722	croak ("\3terminate\2\n");
		1723
		1724	SvREFCNT_dec (coro->saved_deffh);
		1725	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1726
		1727	hv_store (hv, "desc", sizeof ("desc") - 1,
		1728	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1729
		1730	invoke_av = (AV *)SvRV (invoke);
		1731	len = av_len (invoke_av);
		1732
		1733	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1734
		1735	if (len > 0)
		1736	{
		1737	av_fill (defav, len - 1);
		1738	for (i = 0; i < len; ++i)
		1739	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1740	}
		1741
		1742	SvREFCNT_dec (invoke);
		1743	}
		1744
		1745	void
		1746	_pool_2 (SV *cb)
		1747	CODE:
		1748	{
		1749	struct coro *coro = SvSTATE (coro_current);
		1750
		1751	sv_setsv (cb, &PL_sv_undef);
		1752
		1753	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1754	coro->saved_deffh = 0;
		1755
		1756	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1757	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1758	croak ("\3terminate\2\n");
		1759
		1760	av_clear (GvAV (PL_defgv));
		1761	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1762	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1763
		1764	coro->prio = 0;
		1765
		1766	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1767	api_trace (coro_current, 0);
		1768
		1769	av_push (av_async_pool, newSVsv (coro_current));
		1770	}
		1771
		1772
1209	MODULE = Coro::State PACKAGE = Coro::AIO	1773	MODULE = Coro::State PACKAGE = Coro::AIO
1210		1774
1211	SV *	1775	SV *
1212	_get_state ()	1776	_get_state ()
1213	CODE:	1777	CODE:
1214	{	1778	{
1215	struct {	1779	struct io_state *data;
1216	int errorno;
1217	int laststype;
1218	int laststatval;
1219	Stat_t statcache;
1220	} data;
1221		1780
		1781	RETVAL = newSV (sizeof (struct io_state));
		1782	data = (struct io_state *)SvPVX (RETVAL);
		1783	SvCUR_set (RETVAL, sizeof (struct io_state));
		1784	SvPOK_only (RETVAL);
		1785
1222	data.errorno = errno;	1786	data->errorno = errno;
1223	data.laststype = PL_laststype;	1787	data->laststype = PL_laststype;
1224	data.laststatval = PL_laststatval;	1788	data->laststatval = PL_laststatval;
1225	data.statcache = PL_statcache;	1789	data->statcache = PL_statcache;
1226
1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
1228	}	1790	}
1229	OUTPUT:	1791	OUTPUT:
1230	RETVAL	1792	RETVAL
1231		1793
1232	void	1794	void
1233	_set_state (char *data_)	1795	_set_state (char *data_)
1234	PROTOTYPE: $	1796	PROTOTYPE: $
1235	CODE:	1797	CODE:
1236	{	1798	{
1237	struct {	1799	struct io_state *data = (void *)data_;
1238	int errorno;
1239	int laststype;
1240	int laststatval;
1241	Stat_t statcache;
1242	} *data = (void *)data_;
1243		1800
1244	errno = data->errorno;	1801	errno = data->errorno;
1245	PL_laststype = data->laststype;	1802	PL_laststype = data->laststype;
1246	PL_laststatval = data->laststatval;	1803	PL_laststatval = data->laststatval;
1247	PL_statcache = data->statcache;	1804	PL_statcache = data->statcache;
1248	}	1805	}
		1806

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