ViewVC Help

View File | Revision Log | Show Annotations | Download File

/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 1.181 by root, Wed Oct 3 17:37:33 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	GV *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	GV *defoutgv;
		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	PL_defoutgv = c->deffh;
291	PL_op = c->op;	396	PL_rs = c->irssv;
292	PL_curpad = c->curpad;	397	GvSV (irsgv) = c->irssv_sv;
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		398
322	{	399	{
323	dSP;	400	dSP;
324	CV *cv;	401	CV *cv;
325		402
326	/* now do the ugly restore mess */	403	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	404	while ((cv = (CV *)POPs))
328	{	405	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	406	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	407	CvDEPTH (cv) = PTR2IV (POPs);
335	}	408	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	409	}
339		410
340	PUTBACK;	411	PUTBACK;
341	}	412	}
342	}	413	}
343		414
344	static void	415	static void
345	save_state(Coro__State c, int flags)	416	save_perl (pTHX_ Coro__State c)
346	{	417	{
347	{	418	{
348	dSP;	419	dSP;
349	I32 cxix = cxstack_ix;	420	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	421	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	424	/*
354	* the worst thing you can imagine happens first - we have to save	425	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	426	* (and reinitialize) all cv's in the whole callchain :(
356	*/	427	*/
357		428
358	PUSHs (Nullsv);	429	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	430	/* this loop was inspired by pp_caller */
360	for (;;)	431	for (;;)
361	{	432	{
362	while (cxix >= 0)	433	while (cxix >= 0)
363	{	434	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	435	PERL_CONTEXT *cx = &ccstk[cxix--];
365		436
366	if (CxTYPE(cx) == CXt_SUB)	437	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	438	{
368	CV *cv = cx->blk_sub.cv;	439	CV *cv = cx->blk_sub.cv;
		440
369	if (CvDEPTH(cv))	441	if (CvDEPTH (cv))
370	{	442	{
371	EXTEND (SP, CvDEPTH(cv)*2);	443	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));	444	PUSHs ((SV *)CvPADLIST (cv));
		445	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	446	PUSHs ((SV *)cv);
382		447
		448	CvDEPTH (cv) = 0;
383	get_padlist (cv);	449	get_padlist (aTHX_ cv);
384	}	450	}
385	}	451	}
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	}	452	}
395		453
396	if (top_si->si_type == PERLSI_MAIN)	454	if (top_si->si_type == PERLSI_MAIN)
397	break;	455	break;
398		456
399	top_si = top_si->si_prev;	457	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	458	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	459	cxix = top_si->si_cxix;
402	}	460	}
403		461
404	PUTBACK;	462	PUTBACK;
405	}	463	}
406		464
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	465	c->defav = GvAV (PL_defgv);
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	466	c->defsv = DEFSV;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	467	c->errsv = ERRSV;
		468	c->deffh = PL_defoutgv;
		469	c->irssv = PL_rs;
		470	c->irssv_sv = GvSV (irsgv);
410		471
411	c->dowarn = PL_dowarn;	472	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	473	# include "state.h"
413		474	#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	}	475	}
445		476
446	/*	477	/*
447	* allocate various perl stacks. This is an exact copy	478	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	479	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	480	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	481	* not usually need a lot of stackspace.
451	*/	482	*/
		483	#if CORO_PREFER_PERL_FUNCTIONS
		484	# define coro_init_stacks init_stacks
		485	#else
452	static void	486	static void
453	coro_init_stacks ()	487	coro_init_stacks (pTHX)
454	{	488	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	489	PL_curstackinfo = new_stackinfo(64, 6);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	490	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	491	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		493
460	PL_stack_base = AvARRAY(PL_curstack);	494	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	495	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		497
464	New(50,PL_tmps_stack,96,SV*);	498	New(50,PL_tmps_stack,64,SV*);
465	PL_tmps_floor = -1;	499	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	500	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	501	PL_tmps_max = 64;
468		502
469	New(54,PL_markstack,16,I32);	503	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	504	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	505	PL_markstack_max = PL_markstack + 16;
472		506
…		…
476		510
477	New(54,PL_scopestack,16,I32);	511	New(54,PL_scopestack,16,I32);
478	PL_scopestack_ix = 0;	512	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	513	PL_scopestack_max = 16;
480		514
481	New(54,PL_savestack,96,ANY);	515	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	516	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	517	PL_savestack_max = 64;
484		518
485	#if !PERL_VERSION_ATLEAST (5,9,0)	519	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	520	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	521	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	522	PL_retstack_max = 4;
489	#endif	523	#endif
490	}	524	}
		525	#endif
491		526
492	/*	527	/*
493	* destroy the stacks, the callchain etc...	528	* destroy the stacks, the callchain etc...
494	*/	529	*/
495	static void	530	static void
496	destroy_stacks()	531	coro_destroy_stacks (pTHX)
497	{	532	{
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)	533	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
511		535
512	while (PL_curstackinfo)	536	while (PL_curstackinfo)
513	{	537	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
515		539
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		542
528	Safefree (PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	544	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	545	PL_curstackinfo = p;
531	}	546	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	552	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	553	Safefree (PL_retstack);
539	#endif	554	#endif
540	}	555	}
541		556
542	static void	557	static size_t
543	setup_coro (struct coro *coro)	558	coro_rss (pTHX_ struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
		565	{
		566	#define VAR(name,type)coro->name = PL_ ## name;
		567	# include "state.h"
		568	#undef VAR
		569	}
		570
		571	rss += sizeof (coro->curstackinfo);
		572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
		579
		580	#if !PERL_VERSION_ATLEAST (5,9,0)
		581	rss += coro->retstack_max * sizeof (OP *);
		582	#endif
		583	}
		584
		585	return rss;
		586	}
		587
		588	/** coroutine stack handling ************************************************/
		589
		590	static void
		591	coro_setup (pTHX_ struct coro *coro)
544	{	592	{
545	/*	593	/*
546	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
547	*/	595	*/
548	dTHX;	596	coro_init_stacks (aTHX);
		597
		598	PL_runops = RUNOPS_DEFAULT;
		599	PL_curcop = &PL_compiling;
		600	PL_in_eval = EVAL_NULL;
		601	PL_comppad = 0;
		602	PL_curpm = 0;
		603	PL_localizing = 0;
		604	PL_dirty = 0;
		605	PL_restartop = 0;
		606
		607	GvSV (PL_defgv) = NEWSV (0, 0);
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609	GvSV (PL_errgv) = NEWSV (0, 0);
		610	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		611	PL_rs = newSVsv (GvSV (irsgv));
		612
		613	{
		614	IO *io = newIO ();
		615	PL_defoutgv = newGVgen ("Coro");
		616	GvIOp(PL_defoutgv) = io;
		617	IoTYPE (io) = IoTYPE_WRONLY;
		618	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		619	IoFLAGS (io) |= IOf_FLUSH;
		620	}
		621
		622	{
		623	dSP;
		624	LOGOP myop;
		625
		626	Zero (&myop, 1, LOGOP);
		627	myop.op_next = Nullop;
		628	myop.op_flags = OPf_WANT_VOID;
		629
		630	PUSHMARK (SP);
		631	XPUSHs (av_shift (GvAV (PL_defgv)));
		632	PUTBACK;
		633	PL_op = (OP *)&myop;
		634	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		635	SPAGAIN;
		636	}
		637
		638	ENTER; /* necessary e.g. for dounwind */
		639	}
		640
		641	static void
		642	coro_destroy (pTHX_ struct coro *coro)
		643	{
		644	if (!IN_DESTRUCT)
		645	{
		646	/* restore all saved variables and stuff */
		647	LEAVE_SCOPE (0);
		648	assert (PL_tmps_floor == -1);
		649
		650	/* free all temporaries */
		651	FREETMPS;
		652	assert (PL_tmps_ix == -1);
		653
		654	/* unwind all extra stacks */
		655	POPSTACK_TO (PL_mainstack);
		656
		657	/* unwind main stack */
		658	dounwind (-1);
		659	}
		660
		661	SvREFCNT_dec (GvSV (PL_defgv));
		662	SvREFCNT_dec (GvAV (PL_defgv));
		663	SvREFCNT_dec (GvSV (PL_errgv));
		664	SvREFCNT_dec (PL_defoutgv);
		665	SvREFCNT_dec (PL_rs);
		666	SvREFCNT_dec (GvSV (irsgv));
		667
		668	SvREFCNT_dec (coro->defoutgv);
		669	//SvREFCNT_dec (coro->throw);
		670
		671	coro_destroy_stacks (aTHX);
		672	}
		673
		674	static void
		675	free_coro_mortal (pTHX)
		676	{
		677	if (coro_mortal)
		678	{
		679	SvREFCNT_dec (coro_mortal);
		680	coro_mortal = 0;
		681	}
		682	}
		683
		684	static int
		685	runops_trace (pTHX)
		686	{
		687	COP *oldcop = 0;
		688	int oldcxix = -2;
		689	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		690	coro_cctx *cctx = coro->cctx;
		691
		692	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		693	{
		694	PERL_ASYNC_CHECK ();
		695
		696	if (cctx->flags & CC_TRACE_ALL)
		697	{
		698	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		699	{
		700	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		701	SV **bot, **top;
		702	AV *av = newAV (); /* return values */
		703	SV **cb;
		704	dSP;
		705
		706	GV *gv = CvGV (cx->blk_sub.cv);
		707	SV *fullname = sv_2mortal (newSV (0));
		708	if (isGV (gv))
		709	gv_efullname3 (fullname, gv, 0);
		710
		711	bot = PL_stack_base + cx->blk_oldsp + 1;
		712	top = cx->blk_gimme == G_ARRAY ? SP + 1
		713	: cx->blk_gimme == G_SCALAR ? bot + 1
		714	: bot;
		715
		716	while (bot < top)
		717	av_push (av, SvREFCNT_inc (*bot++));
		718
		719	PL_runops = RUNOPS_DEFAULT;
		720	ENTER;
		721	SAVETMPS;
		722	EXTEND (SP, 3);
		723	PUSHMARK (SP);
		724	PUSHs (&PL_sv_no);
		725	PUSHs (fullname);
		726	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		727	PUTBACK;
		728	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		729	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		730	SPAGAIN;
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = runops_trace;
		734	}
		735
		736	if (oldcop != PL_curcop)
		737	{
		738	oldcop = PL_curcop;
		739
		740	if (PL_curcop != &PL_compiling)
		741	{
		742	SV **cb;
		743
		744	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		745	{
		746	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		747
		748	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		749	{
		750	runops_proc_t old_runops = PL_runops;
		751	dSP;
		752	GV *gv = CvGV (cx->blk_sub.cv);
		753	SV *fullname = sv_2mortal (newSV (0));
		754
		755	if (isGV (gv))
		756	gv_efullname3 (fullname, gv, 0);
		757
		758	PL_runops = RUNOPS_DEFAULT;
		759	ENTER;
		760	SAVETMPS;
		761	EXTEND (SP, 3);
		762	PUSHMARK (SP);
		763	PUSHs (&PL_sv_yes);
		764	PUSHs (fullname);
		765	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		766	PUTBACK;
		767	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		768	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		769	SPAGAIN;
		770	FREETMPS;
		771	LEAVE;
		772	PL_runops = runops_trace;
		773	}
		774
		775	oldcxix = cxstack_ix;
		776	}
		777
		778	if (cctx->flags & CC_TRACE_LINE)
		779	{
		780	dSP;
		781
		782	PL_runops = RUNOPS_DEFAULT;
		783	ENTER;
		784	SAVETMPS;
		785	EXTEND (SP, 3);
		786	PL_runops = RUNOPS_DEFAULT;
		787	PUSHMARK (SP);
		788	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		789	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		790	PUTBACK;
		791	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		792	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		793	SPAGAIN;
		794	FREETMPS;
		795	LEAVE;
		796	PL_runops = runops_trace;
		797	}
		798	}
		799	}
		800	}
		801	}
		802
		803	TAINT_NOT;
		804	return 0;
		805	}
		806
		807	/* inject a fake call to Coro::State::_cctx_init into the execution */
		808	/* _cctx_init should be careful, as it could be called at almost any time */
		809	/* during execution of a perl program */
		810	static void NOINLINE
		811	prepare_cctx (pTHX_ coro_cctx *cctx)
		812	{
549	dSP;	813	dSP;
550	UNOP myop;	814	LOGOP myop;
551	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552		815
553	coro_init_stacks ();	816	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		817
559	SPAGAIN;	818	if (cctx->flags & CC_TRACE)
		819	PL_runops = runops_trace;
560		820
561	Zero (&myop, 1, UNOP);	821	Zero (&myop, 1, LOGOP);
562	myop.op_next = Nullop;	822	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID;	823	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564		824
		825	PUSHMARK (SP);
		826	EXTEND (SP, 2);
		827	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		828	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		829	PUTBACK;
565	PL_op = (OP *)&myop;	830	PL_op = (OP *)&myop;
566
567	PUSHMARK(SP);
568	XPUSHs (sub_init);
569	PUTBACK;
570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	831	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571	SPAGAIN;	832	SPAGAIN;
572
573	ENTER; /* necessary e.g. for dounwind */
574	}	833	}
575		834
		835	/*
		836	* this is a _very_ stripped down perl interpreter ;)
		837	*/
576	static void	838	static void
577	free_coro_mortal ()	839	coro_run (void *arg)
578	{	840	{
579	if (coro_mortal)	841	dTHX;
580	{	842
581	SvREFCNT_dec (coro_mortal);	843	/* coro_run is the alternative tail of transfer(), so unlock here. */
582	coro_mortal = 0;	844	UNLOCK;
		845
		846	/* we now skip the entersub that lead to transfer() */
		847	PL_op = PL_op->op_next;
		848
		849	/* inject a fake subroutine call to cctx_init */
		850	prepare_cctx (aTHX_ (coro_cctx *)arg);
		851
		852	/* somebody or something will hit me for both perl_run and PL_restartop */
		853	PL_restartop = PL_op;
		854	perl_run (PL_curinterp);
		855
		856	/*
		857	* If perl-run returns we assume exit() was being called or the coro
		858	* fell off the end, which seems to be the only valid (non-bug)
		859	* reason for perl_run to return. We try to exit by jumping to the
		860	* bootstrap-time "top" top_env, as we cannot restore the "main"
		861	* coroutine as Coro has no such concept
		862	*/
		863	PL_top_env = main_top_env;
		864	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		865	}
		866
		867	static coro_cctx *
		868	cctx_new ()
		869	{
		870	coro_cctx *cctx;
		871	void *stack_start;
		872	size_t stack_size;
		873
		874	++cctx_count;
		875
		876	Newz (0, cctx, 1, coro_cctx);
		877
		878	#if HAVE_MMAP
		879
		880	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		881	/* mmap supposedly does allocate-on-write for us */
		882	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		883
		884	if (cctx->sptr != (void *)-1)
583	}	885	{
		886	# if CORO_STACKGUARD
		887	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		888	# endif
		889	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		890	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		891	cctx->flags |= CC_MAPPED;
		892	}
		893	else
		894	#endif
		895	{
		896	cctx->ssize = coro_stacksize * (long)sizeof (long);
		897	New (0, cctx->sptr, coro_stacksize, long);
		898
		899	if (!cctx->sptr)
		900	{
		901	perror ("FATAL: unable to allocate stack for coroutine");
		902	_exit (EXIT_FAILURE);
		903	}
		904
		905	stack_start = cctx->sptr;
		906	stack_size = cctx->ssize;
		907	}
		908
		909	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		910	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		911
		912	return cctx;
584	}	913	}
		914
		915	static void
		916	cctx_destroy (coro_cctx *cctx)
		917	{
		918	if (!cctx)
		919	return;
		920
		921	--cctx_count;
		922
		923	#if CORO_USE_VALGRIND
		924	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		925	#endif
		926
		927	#if HAVE_MMAP
		928	if (cctx->flags & CC_MAPPED)
		929	munmap (cctx->sptr, cctx->ssize);
		930	else
		931	#endif
		932	Safefree (cctx->sptr);
		933
		934	Safefree (cctx);
		935	}
		936
		937	static coro_cctx *
		938	cctx_get (pTHX)
		939	{
		940	while (cctx_first)
		941	{
		942	coro_cctx *cctx = cctx_first;
		943	cctx_first = cctx->next;
		944	--cctx_idle;
		945
		946	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		947	return cctx;
		948
		949	cctx_destroy (cctx);
		950	}
		951
		952	return cctx_new ();
		953	}
		954
		955	static void
		956	cctx_put (coro_cctx *cctx)
		957	{
		958	/* free another cctx if overlimit */
		959	if (cctx_idle >= MAX_IDLE_CCTX)
		960	{
		961	coro_cctx *first = cctx_first;
		962	cctx_first = first->next;
		963	--cctx_idle;
		964
		965	cctx_destroy (first);
		966	}
		967
		968	++cctx_idle;
		969	cctx->next = cctx_first;
		970	cctx_first = cctx;
		971	}
		972
		973	/** coroutine switching *****************************************************/
585		974
586	static void NOINLINE	975	static void NOINLINE
587	prepare_cctx (coro_stack *cctx)	976	transfer_check (pTHX_ struct coro *prev, struct coro *next)
588	{	977	{
589	dSP;	978	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	{	979	{
693	stack = stack_new ();	980	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
694	PL_op = PL_op->op_next;	981	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		982
		983	if (next->flags & CF_RUNNING)
		984	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		985
		986	if (next->flags & CF_DESTROYED)
		987	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		988
		989	if (PL_lex_state != LEX_NOTPARSING)
		990	croak ("Coro::State::transfer called while parsing, but this is not supported");
695	}	991	}
696
697	return stack;
698	}	992	}
699		993
700	static void	994	/* 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	995	static void NOINLINE
709	transfer (struct coro *prev, struct coro *next, int flags)	996	transfer (pTHX_ struct coro *prev, struct coro *next)
710	{	997	{
711	dSTACKLEVEL;	998	dSTACKLEVEL;
712		999
713	/* sometimes transfer is only called to set idle_sp */	1000	/* sometimes transfer is only called to set idle_sp */
714	if (flags == TRANSFER_SET_STACKLEVEL)	1001	if (!next)
		1002	{
715	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1003	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1004	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1005	}
716	else if (prev != next)	1006	else if (prev != next)
717	{	1007	{
718	coro_stack *prev__stack;	1008	coro_cctx *prev__cctx;
		1009
		1010	if (prev->flags & CF_NEW)
		1011	{
		1012	/* create a new empty context */
		1013	Newz (0, prev->cctx, 1, coro_cctx);
		1014	prev->flags &= ~CF_NEW;
		1015	prev->flags |= CF_RUNNING;
		1016	}
		1017
		1018	prev->flags &= ~CF_RUNNING;
		1019	next->flags |= CF_RUNNING;
719		1020
720	LOCK;	1021	LOCK;
721		1022
722	if (next->mainstack)	1023	if (next->flags & CF_NEW)
723	{	1024	{
724	/* coroutine already started */	1025	/* need to start coroutine */
725	SAVE (prev, flags);	1026	next->flags &= ~CF_NEW;
726	LOAD (next);	1027	/* first get rid of the old state */
		1028	save_perl (aTHX_ prev);
		1029	/* setup coroutine call */
		1030	coro_setup (aTHX_ next);
727	}	1031	}
728	else	1032	else
729	{	1033	{
730	/* need to start coroutine */	1034	/* coroutine already started */
731	/* first get rid of the old state */	1035	save_perl (aTHX_ prev);
732	SAVE (prev, -1);	1036	load_perl (aTHX_ next);
733	/* setup coroutine call */
734	setup_coro (next);
735	/* need a stack */
736	next->stack = 0;
737	}	1037	}
738		1038
739	if (!prev->stack)
740	/* create a new empty context */
741	Newz (0, prev->stack, 1, coro_stack);
742
743	prev__stack = prev->stack;	1039	prev__cctx = prev->cctx;
744		1040
745	/* possibly "free" the stack */	1041	/* possibly "free" the cctx */
746	if (prev__stack->idle_sp == STACKLEVEL)	1042	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
747	{	1043	{
748	stack_put (prev__stack);	1044	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1045	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1046
749	prev->stack = 0;	1047	prev->cctx = 0;
		1048
		1049	cctx_put (prev__cctx);
750	}	1050	}
751		1051
		1052	++next->usecount;
		1053
752	if (!next->stack)	1054	if (!next->cctx)
753	next->stack = stack_get ();	1055	next->cctx = cctx_get (aTHX);
754		1056
755	if (prev__stack != next->stack)	1057	if (prev__cctx != next->cctx)
756	{	1058	{
757	prev__stack->top_env = PL_top_env;	1059	prev__cctx->top_env = PL_top_env;
758	PL_top_env = next->stack->top_env;	1060	PL_top_env = next->cctx->top_env;
759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1061	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
760	}	1062	}
761		1063
762	free_coro_mortal ();	1064	free_coro_mortal (aTHX);
763
764	UNLOCK;	1065	UNLOCK;
765	}	1066	}
766	}	1067	}
767		1068
768	struct transfer_args	1069	struct transfer_args
769	{	1070	{
770	struct coro *prev, *next;	1071	struct coro *prev, *next;
771	int flags;
772	};	1072	};
773		1073
774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1074	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1075	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
775		1076
		1077	/** high level stuff ********************************************************/
		1078
776	static void	1079	static int
777	coro_state_destroy (struct coro *coro)	1080	coro_state_destroy (pTHX_ struct coro *coro)
778	{	1081	{
779	if (coro->refcnt--)	1082	if (coro->flags & CF_DESTROYED)
780	return;	1083	return 0;
		1084
		1085	coro->flags |= CF_DESTROYED;
		1086
		1087	if (coro->flags & CF_READY)
		1088	{
		1089	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1090	/* alternative: look through all ready queues and remove the coro */
		1091	LOCK;
		1092	--coro_nready;
		1093	UNLOCK;
		1094	}
		1095	else
		1096	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
781		1097
782	if (coro->mainstack && coro->mainstack != main_mainstack)	1098	if (coro->mainstack && coro->mainstack != main_mainstack)
783	{	1099	{
784	struct coro temp;	1100	struct coro temp;
785		1101
786	SAVE ((&temp), TRANSFER_SAVE_ALL);	1102	if (coro->flags & CF_RUNNING)
787	LOAD (coro);	1103	croak ("FATAL: tried to destroy currently running coroutine");
788		1104
789	destroy_stacks ();	1105	save_perl (aTHX_ &temp);
		1106	load_perl (aTHX_ coro);
790		1107
		1108	coro_destroy (aTHX_ coro);
		1109
791	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1110	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
792		1111
793	coro->mainstack = 0;	1112	coro->mainstack = 0;
794	}	1113	}
795		1114
796	stack_free (coro->stack);	1115	cctx_destroy (coro->cctx);
797	SvREFCNT_dec (coro->args);	1116	SvREFCNT_dec (coro->args);
798	Safefree (coro);	1117
		1118	if (coro->next) coro->next->prev = coro->prev;
		1119	if (coro->prev) coro->prev->next = coro->next;
		1120	if (coro == coro_first) coro_first = coro->next;
		1121
		1122	return 1;
799	}	1123	}
800		1124
801	static int	1125	static int
802	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1126	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
803	{	1127	{
804	struct coro *coro = (struct coro *)mg->mg_ptr;	1128	struct coro *coro = (struct coro *)mg->mg_ptr;
805	mg->mg_ptr = 0;	1129	mg->mg_ptr = 0;
806		1130
		1131	coro->hv = 0;
		1132
		1133	if (--coro->refcnt < 0)
		1134	{
807	coro_state_destroy (coro);	1135	coro_state_destroy (aTHX_ coro);
		1136	Safefree (coro);
		1137	}
808		1138
809	return 0;	1139	return 0;
810	}	1140	}
811		1141
812	static int	1142	static int
…		…
819	return 0;	1149	return 0;
820	}	1150	}
821		1151
822	static MGVTBL coro_state_vtbl = {	1152	static MGVTBL coro_state_vtbl = {
823	0, 0, 0, 0,	1153	0, 0, 0, 0,
824	coro_state_clear,	1154	coro_state_free,
825	0,	1155	0,
826	#ifdef MGf_DUP	1156	#ifdef MGf_DUP
827	coro_state_dup,	1157	coro_state_dup,
		1158	#else
		1159	# define MGf_DUP 0
828	#endif	1160	#endif
829	};	1161	};
830		1162
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	1163	static void
854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1164	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855	{	1165	{
856	ta->prev = SvSTATE (prev);	1166	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1167	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;	1168	TRANSFER_CHECK (*ta);
859	}	1169	}
860		1170
861	static void	1171	static void
862	api_transfer (SV *prev, SV *next, int flags)	1172	api_transfer (SV *prev_sv, SV *next_sv)
863	{	1173	{
864	dTHX;	1174	dTHX;
865	struct transfer_args ta;	1175	struct transfer_args ta;
866		1176
867	prepare_transfer (&ta, prev, next, flags);	1177	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1178	TRANSFER (ta);
869	}	1179	}
870		1180
871	/** Coro ********************************************************************/	1181	/** Coro ********************************************************************/
872		1182
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	1183	static void
886	coro_enq (SV *sv)	1184	coro_enq (pTHX_ SV *coro_sv)
887	{	1185	{
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);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	1187	}
898		1188
899	static SV *	1189	static SV *
900	coro_deq (int min_prio)	1190	coro_deq (pTHX_ int min_prio)
901	{	1191	{
902	int prio = PRIO_MAX - PRIO_MIN;	1192	int prio = PRIO_MAX - PRIO_MIN;
903		1193
904	min_prio -= PRIO_MIN;	1194	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	1195	if (min_prio < 0)
906	min_prio = 0;	1196	min_prio = 0;
907		1197
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1200	return av_shift (coro_ready [prio]);
913	}
914		1201
915	return 0;	1202	return 0;
916	}	1203	}
917		1204
918	static void	1205	static int
919	api_ready (SV *coro)	1206	api_ready (SV *coro_sv)
920	{	1207	{
921	dTHX;	1208	dTHX;
		1209	struct coro *coro;
922		1210
923	if (SvROK (coro))	1211	if (SvROK (coro_sv))
924	coro = SvRV (coro);	1212	coro_sv = SvRV (coro_sv);
		1213
		1214	coro = SvSTATE (coro_sv);
		1215
		1216	if (coro->flags & CF_READY)
		1217	return 0;
		1218
		1219	coro->flags |= CF_READY;
925		1220
926	LOCK;	1221	LOCK;
927	coro_enq (SvREFCNT_inc (coro));	1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
928	UNLOCK;	1224	UNLOCK;
929	}
930		1225
		1226	return 1;
		1227	}
		1228
931	static void	1229	static int
		1230	api_is_ready (SV *coro_sv)
		1231	{
		1232	dTHX;
		1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1234	}
		1235
		1236	static void
932	prepare_schedule (struct transfer_args *ta)	1237	prepare_schedule (pTHX_ struct transfer_args *ta)
933	{	1238	{
934	SV *current, *prev, *next;	1239	SV *prev_sv, *next_sv;
935
936	current = GvSV (coro_current);
937		1240
938	for (;;)	1241	for (;;)
939	{	1242	{
940	LOCK;	1243	LOCK;
941	next = coro_deq (PRIO_MIN);	1244	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1245
		1246	/* nothing to schedule: call the idle handler */
		1247	if (!next_sv)
		1248	{
		1249	dSP;
		1250	UNLOCK;
		1251
		1252	ENTER;
		1253	SAVETMPS;
		1254
		1255	PUSHMARK (SP);
		1256	PUTBACK;
		1257	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1258
		1259	FREETMPS;
		1260	LEAVE;
		1261	continue;
		1262	}
		1263
		1264	ta->next = SvSTATE (next_sv);
		1265
		1266	/* cannot transfer to destroyed coros, skip and look for next */
		1267	if (ta->next->flags & CF_DESTROYED)
		1268	{
		1269	UNLOCK;
		1270	SvREFCNT_dec (next_sv);
		1271	/* coro_nready is already taken care of by destroy */
		1272	continue;
		1273	}
		1274
		1275	--coro_nready;
942	UNLOCK;	1276	UNLOCK;
943
944	if (next)
945	break;	1277	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	}	1278	}
960	}
961
962	prev = SvRV (current);
963	SvRV (current) = next;
964		1279
965	/* free this only after the transfer */	1280	/* free this only after the transfer */
		1281	prev_sv = SvRV (coro_current);
		1282	ta->prev = SvSTATE (prev_sv);
		1283	TRANSFER_CHECK (*ta);
		1284	assert (ta->next->flags & CF_READY);
		1285	ta->next->flags &= ~CF_READY;
		1286	SvRV_set (coro_current, next_sv);
		1287
966	LOCK;	1288	LOCK;
967	free_coro_mortal ();	1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
968	UNLOCK;	1291	UNLOCK;
969	coro_mortal = prev;
970
971	ta->prev = SvSTATE (prev);
972	ta->next = SvSTATE (next);
973	ta->flags = TRANSFER_SAVE_ALL;
974	}	1292	}
975		1293
976	static void	1294	static void
977	prepare_cede (struct transfer_args *ta)	1295	prepare_cede (pTHX_ struct transfer_args *ta)
978	{	1296	{
979	LOCK;	1297	api_ready (coro_current);
980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981	UNLOCK;
982
983	prepare_schedule (ta);	1298	prepare_schedule (aTHX_ ta);
		1299	}
		1300
		1301	static int
		1302	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1303	{
		1304	if (coro_nready)
		1305	{
		1306	SV *prev = SvRV (coro_current);
		1307	prepare_schedule (aTHX_ ta);
		1308	api_ready (prev);
		1309	return 1;
		1310	}
		1311	else
		1312	return 0;
984	}	1313	}
985		1314
986	static void	1315	static void
987	api_schedule (void)	1316	api_schedule (void)
988	{	1317	{
989	dTHX;	1318	dTHX;
990	struct transfer_args ta;	1319	struct transfer_args ta;
991		1320
992	prepare_schedule (&ta);	1321	prepare_schedule (aTHX_ &ta);
993	TRANSFER (ta);	1322	TRANSFER (ta);
994	}	1323	}
995		1324
996	static void	1325	static int
997	api_cede (void)	1326	api_cede (void)
998	{	1327	{
999	dTHX;	1328	dTHX;
1000	struct transfer_args ta;	1329	struct transfer_args ta;
1001		1330
1002	prepare_cede (&ta);	1331	prepare_cede (aTHX_ &ta);
		1332
		1333	if (ta.prev != ta.next)
		1334	{
1003	TRANSFER (ta);	1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
1004	}	1340	}
1005		1341
		1342	static int
		1343	api_cede_notself (void)
		1344	{
		1345	dTHX;
		1346	struct transfer_args ta;
		1347
		1348	if (prepare_cede_notself (aTHX_ &ta))
		1349	{
		1350	TRANSFER (ta);
		1351	return 1;
		1352	}
		1353	else
		1354	return 0;
		1355	}
		1356
		1357	static void
		1358	api_trace (SV *coro_sv, int flags)
		1359	{
		1360	dTHX;
		1361	struct coro *coro = SvSTATE (coro_sv);
		1362
		1363	if (flags & CC_TRACE)
		1364	{
		1365	if (!coro->cctx)
		1366	coro->cctx = cctx_new ();
		1367	else if (!(coro->cctx->flags & CC_TRACE))
		1368	croak ("cannot enable tracing on coroutine with custom stack");
		1369
		1370	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1371	}
		1372	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1373	{
		1374	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1375
		1376	if (coro->flags & CF_RUNNING)
		1377	PL_runops = RUNOPS_DEFAULT;
		1378	else
		1379	coro->runops = RUNOPS_DEFAULT;
		1380	}
		1381	}
		1382
1006	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007		1384
1008	PROTOTYPES: DISABLE	1385	PROTOTYPES: DISABLE
1009		1386
1010	BOOT:	1387	BOOT:
1011	{	1388	{
1012	#ifdef USE_ITHREADS	1389	#ifdef USE_ITHREADS
1013	MUTEX_INIT (&coro_mutex);	1390	MUTEX_INIT (&coro_mutex);
1014	#endif	1391	#endif
1015	BOOT_PAGESIZE;	1392	BOOT_PAGESIZE;
1016		1393
		1394	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1395
1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018		1397
1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022		1402
1023	main_mainstack = PL_mainstack;	1403	main_mainstack = PL_mainstack;
		1404	main_top_env = PL_top_env;
		1405
		1406	while (main_top_env->je_prev)
		1407	main_top_env = main_top_env->je_prev;
1024		1408
1025	coroapi.ver = CORO_API_VERSION;	1409	coroapi.ver = CORO_API_VERSION;
1026	coroapi.transfer = api_transfer;	1410	coroapi.transfer = api_transfer;
1027		1411
1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1412	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1035	struct coro *coro;	1419	struct coro *coro;
1036	HV *hv;	1420	HV *hv;
1037	int i;	1421	int i;
1038		1422
1039	Newz (0, coro, 1, struct coro);	1423	Newz (0, coro, 1, struct coro);
1040	coro->args = newAV ();	1424	coro->args = newAV ();
		1425	coro->flags = CF_NEW;
1041		1426
		1427	if (coro_first) coro_first->prev = coro;
		1428	coro->next = coro_first;
		1429	coro_first = coro;
		1430
1042	hv = newHV ();	1431	coro->hv = hv = newHV ();
1043	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1432	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));	1433	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045		1434
1046	for (i = 1; i < items; i++)	1435	for (i = 1; i < items; i++)
1047	av_push (coro->args, newSVsv (ST (i)));	1436	av_push (coro->args, newSVsv (ST (i)));
1048
1049	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1050	/*coro->stack = 0;*/
1051	}	1437	}
1052	OUTPUT:	1438	OUTPUT:
1053	RETVAL	1439	RETVAL
1054		1440
		1441	# these not obviously related functions are all rolled into the same xs
		1442	# function to increase chances that they all will call transfer with the same
		1443	# stack offset
1055	void	1444	void
1056	_set_stacklevel (...)	1445	_set_stacklevel (...)
1057	ALIAS:	1446	ALIAS:
1058	Coro::State::transfer = 1	1447	Coro::State::transfer = 1
1059	Coro::schedule = 2	1448	Coro::schedule = 2
1060	Coro::cede = 3	1449	Coro::cede = 3
1061	Coro::Cont::yield = 4	1450	Coro::cede_notself = 4
1062	CODE:	1451	CODE:
1063	{	1452	{
1064	struct transfer_args ta;	1453	struct transfer_args ta;
1065		1454
1066	switch (ix)	1455	switch (ix)
1067	{	1456	{
1068	case 0:	1457	case 0:
1069	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1458	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1070	ta.next = 0;	1459	ta.next = 0;
1071	ta.flags = TRANSFER_SET_STACKLEVEL;
1072	break;	1460	break;
1073		1461
1074	case 1:	1462	case 1:
1075	if (items != 3)	1463	if (items != 2)
1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1464	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1077		1465
1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1466	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1079	break;	1467	break;
1080		1468
1081	case 2:	1469	case 2:
1082	prepare_schedule (&ta);	1470	prepare_schedule (aTHX_ &ta);
1083	break;	1471	break;
1084		1472
1085	case 3:	1473	case 3:
1086	prepare_cede (&ta);	1474	prepare_cede (aTHX_ &ta);
1087	break;	1475	break;
1088		1476
1089	case 4:	1477	case 4:
1090	{	1478	if (!prepare_cede_notself (aTHX_ &ta))
1091	SV *yieldstack;	1479	XSRETURN_EMPTY;
1092	SV *sv;
1093	AV *defav = GvAV (PL_defgv);
1094		1480
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;	1481	break;
1114
1115	}	1482	}
1116		1483
		1484	BARRIER;
1117	TRANSFER (ta);	1485	TRANSFER (ta);
1118	}
1119		1486
1120	void	1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
1121	_clone_state_from (SV *dst, SV *src)	1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
1122	CODE:	1493	CODE:
1123	{	1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1124	struct coro *coro_src = SvSTATE (src);	1495	OUTPUT:
1125		1496	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		1497
1132	void	1498	void
1133	_exit (code)	1499	_exit (code)
1134	int code	1500	int code
1135	PROTOTYPE: $	1501	PROTOTYPE: $
1136	CODE:	1502	CODE:
1137	_exit (code);	1503	_exit (code);
1138		1504
		1505	int
		1506	cctx_stacksize (int new_stacksize = 0)
		1507	CODE:
		1508	RETVAL = coro_stacksize;
		1509	if (new_stacksize)
		1510	coro_stacksize = new_stacksize;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
		1515	cctx_count ()
		1516	CODE:
		1517	RETVAL = cctx_count;
		1518	OUTPUT:
		1519	RETVAL
		1520
		1521	int
		1522	cctx_idle ()
		1523	CODE:
		1524	RETVAL = cctx_idle;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	void
		1529	list ()
		1530	PPCODE:
		1531	{
		1532	struct coro *coro;
		1533	for (coro = coro_first; coro; coro = coro->next)
		1534	if (coro->hv)
		1535	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1536	}
		1537
		1538	void
		1539	call (Coro::State coro, SV *coderef)
		1540	ALIAS:
		1541	eval = 1
		1542	CODE:
		1543	{
		1544	if (coro->mainstack)
		1545	{
		1546	struct coro temp;
		1547	Zero (&temp, 1, struct coro);
		1548
		1549	if (!(coro->flags & CF_RUNNING))
		1550	{
		1551	save_perl (aTHX_ &temp);
		1552	load_perl (aTHX_ coro);
		1553	}
		1554
		1555	{
		1556	dSP;
		1557	ENTER;
		1558	SAVETMPS;
		1559	PUSHMARK (SP);
		1560	PUTBACK;
		1561	if (ix)
		1562	eval_sv (coderef, 0);
		1563	else
		1564	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1565	SPAGAIN;
		1566	FREETMPS;
		1567	LEAVE;
		1568	PUTBACK;
		1569	}
		1570
		1571	if (!(coro->flags & CF_RUNNING))
		1572	{
		1573	save_perl (aTHX_ coro);
		1574	load_perl (aTHX_ &temp);
		1575	}
		1576	}
		1577	}
		1578
		1579	SV *
		1580	is_ready (Coro::State coro)
		1581	PROTOTYPE: $
		1582	ALIAS:
		1583	is_ready = CF_READY
		1584	is_running = CF_RUNNING
		1585	is_new = CF_NEW
		1586	is_destroyed = CF_DESTROYED
		1587	CODE:
		1588	RETVAL = boolSV (coro->flags & ix);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1594
		1595	SV *
		1596	has_stack (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = boolSV (!!coro->cctx);
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	is_traced (Coro::State coro)
		1605	PROTOTYPE: $
		1606	CODE:
		1607	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1608	OUTPUT:
		1609	RETVAL
		1610
		1611	IV
		1612	rss (Coro::State coro)
		1613	PROTOTYPE: $
		1614	ALIAS:
		1615	usecount = 1
		1616	CODE:
		1617	switch (ix)
		1618	{
		1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1620	case 1: RETVAL = coro->usecount; break;
		1621	}
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625
1139	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1140		1627
1141	BOOT:	1628	BOOT:
1142	{	1629	{
1143	int i;	1630	int i;
		1631
		1632	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1633	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1634	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1635
		1636	coro_current = get_sv ("Coro::current", FALSE);
		1637	SvREADONLY_on (coro_current);
1144		1638
1145	coro_stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1146		1640
1147	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153		1647
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--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1159		1650
1160	{	1651	{
1161	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1162		1653
1163	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1164	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1165	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
		1658	coroapi.is_ready = api_is_ready;
1166	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1167	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1168		1661
1169	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1170	sv_setiv (sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1171	SvREADONLY_on (sv);	1664	SvREADONLY_on (sv);
1172	}	1665	}
1173	}	1666	}
		1667
		1668	void
		1669	_set_current (SV *current)
		1670	PROTOTYPE: $
		1671	CODE:
		1672	SvREFCNT_dec (SvRV (coro_current));
		1673	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1174		1674
1175	int	1675	int
1176	prio (Coro::State coro, int newprio = 0)	1676	prio (Coro::State coro, int newprio = 0)
1177	ALIAS:	1677	ALIAS:
1178	nice = 1	1678	nice = 1
…		…
1181	RETVAL = coro->prio;	1681	RETVAL = coro->prio;
1182		1682
1183	if (items > 1)	1683	if (items > 1)
1184	{	1684	{
1185	if (ix)	1685	if (ix)
1186	newprio += coro->prio;	1686	newprio = coro->prio - newprio;
1187		1687
1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190		1690
1191	coro->prio = newprio;	1691	coro->prio = newprio;
1192	}	1692	}
1193	}	1693	}
		1694	OUTPUT:
		1695	RETVAL
1194		1696
1195	void	1697	SV *
1196	ready (SV *self)	1698	ready (SV *self)
1197	PROTOTYPE: $	1699	PROTOTYPE: $
1198	CODE:	1700	CODE:
1199	api_ready (self);	1701	RETVAL = boolSV (api_ready (self));
		1702	OUTPUT:
		1703	RETVAL
1200		1704
1201	int	1705	int
1202	nready (...)	1706	nready (...)
1203	PROTOTYPE:	1707	PROTOTYPE:
1204	CODE:	1708	CODE:
1205	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1206	OUTPUT:	1710	OUTPUT:
1207	RETVAL	1711	RETVAL
1208		1712
		1713	# for async_pool speedup
		1714	void
		1715	_pool_1 (SV *cb)
		1716	CODE:
		1717	{
		1718	struct coro *coro = SvSTATE (coro_current);
		1719	HV *hv = (HV *)SvRV (coro_current);
		1720	AV *defav = GvAV (PL_defgv);
		1721	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1722	AV *invoke_av;
		1723	int i, len;
		1724
		1725	coro->defoutgv = SvREFCNT_inc (PL_defoutgv);
		1726
		1727	if (!invoke)
		1728	croak ("\3terminate\2\n");
		1729
		1730	hv_store (hv, "desc", sizeof ("desc") - 1,
		1731	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1732
		1733	invoke_av = (AV *)SvRV (invoke);
		1734	len = av_len (invoke_av);
		1735
		1736	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1737
		1738	if (len > 0)
		1739	{
		1740	av_fill (defav, len - 1);
		1741	for (i = 0; i < len; ++i)
		1742	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1743	}
		1744
		1745
		1746
		1747	SvREFCNT_dec (invoke);
		1748	}
		1749
		1750	void
		1751	_pool_2 (SV *cb)
		1752	CODE:
		1753	{
		1754	struct coro *coro = SvSTATE (coro_current);
		1755
		1756	sv_setsv (cb, &PL_sv_undef);
		1757
		1758	SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->defoutgv;
		1759
		1760	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1761	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1762	croak ("\3terminate\2\n");
		1763
		1764	av_clear (GvAV (PL_defgv));
		1765	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1767
		1768	coro->prio = 0;
		1769
		1770	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1771	api_trace (coro_current, 0);
		1772
		1773	av_push (av_async_pool, newSVsv (coro_current));
		1774	}
		1775
		1776
1209	MODULE = Coro::State PACKAGE = Coro::AIO	1777	MODULE = Coro::State PACKAGE = Coro::AIO
1210		1778
1211	SV *	1779	SV *
1212	_get_state ()	1780	_get_state ()
1213	CODE:	1781	CODE:
1214	{	1782	{
1215	struct {	1783	struct io_state *data;
1216	int errorno;
1217	int laststype;
1218	int laststatval;
1219	Stat_t statcache;
1220	} data;
1221		1784
		1785	RETVAL = newSV (sizeof (struct io_state));
		1786	data = (struct io_state *)SvPVX (RETVAL);
		1787	SvCUR_set (RETVAL, sizeof (struct io_state));
		1788	SvPOK_only (RETVAL);
		1789
1222	data.errorno = errno;	1790	data->errorno = errno;
1223	data.laststype = PL_laststype;	1791	data->laststype = PL_laststype;
1224	data.laststatval = PL_laststatval;	1792	data->laststatval = PL_laststatval;
1225	data.statcache = PL_statcache;	1793	data->statcache = PL_statcache;
1226
1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
1228	}	1794	}
1229	OUTPUT:	1795	OUTPUT:
1230	RETVAL	1796	RETVAL
1231		1797
1232	void	1798	void
1233	_set_state (char *data_)	1799	_set_state (char *data_)
1234	PROTOTYPE: $	1800	PROTOTYPE: $
1235	CODE:	1801	CODE:
1236	{	1802	{
1237	struct {	1803	struct io_state *data = (void *)data_;
1238	int errorno;
1239	int laststype;
1240	int laststatval;
1241	Stat_t statcache;
1242	} *data = (void *)data_;
1243		1804
1244	errno = data->errorno;	1805	errno = data->errorno;
1245	PL_laststype = data->laststype;	1806	PL_laststype = data->laststype;
1246	PL_laststatval = data->laststatval;	1807	PL_laststatval = data->laststatval;
1247	PL_statcache = data->statcache;	1808	PL_statcache = data->statcache;
1248	}	1809	}
		1810

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines