[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 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) \
13	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))	52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14		53
15	#if !PERL_VERSION_ATLEAST (5,8,0)	54	#if !PERL_VERSION_ATLEAST (5,6,0)
16	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
17	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
18	# endif	57	# endif
19	# ifndef call_sv	58	# ifndef call_sv
20	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
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	IO 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 switches 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
		211	/* linked list */
		212	struct coro next, prev;
		213	HV hv; / the perl hash associated with this coro, if any */
165	};	214	};
166		215
167	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
169		218
		219	/ Coro ******************************************************************/
		220
		221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/ lowlevel stuff ********************************************************/
		235
170	static AV *	236	static AV *
171	coro_clone_padlist (CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
172	{	238	{
173	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
174	AV newpadlist, newpad;	240	AV newpadlist, newpad;
175		241
176	newpadlist = newAV ();	242	newpadlist = newAV ();
…		…
188		254
189	return newpadlist;	255	return newpadlist;
190	}	256	}
191		257
192	static void	258	static void
193	free_padlist (AV *padlist)	259	free_padlist (pTHX_ AV *padlist)
194	{	260	{
195	/* may be during global destruction */	261	/* may be during global destruction */
196	if (SvREFCNT (padlist))	262	if (SvREFCNT (padlist))
197	{	263	{
198	I32 i = AvFILLp (padlist);	264	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	285	AV *padlist;
220	AV av = (AV )mg->mg_obj;	286	AV av = (AV )mg->mg_obj;
221		287
222	/* casting is fun. */	288	/* casting is fun. */
223	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	289	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
224	free_padlist (padlist);	290	free_padlist (aTHX_ padlist);
225		291
226	SvREFCNT_dec (av);	292	SvREFCNT_dec (av);
227		293
228	return 0;	294	return 0;
229	}	295	}
230		296
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	297	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		298
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		300
		301	#define CORO_MAGIC(cv) \
		302	SvMAGIC (cv) \
		303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		304	? SvMAGIC (cv) \
		305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		306	: 0
		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
235	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
236	static void	335	static void
237	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
238	{	337	{
239	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
240		340
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	343	else
244	{	344	{
245	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	346	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	347	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
251	#else	351	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	353	#endif
254	}	354	}
255	}	355	}
256		356
257	static void	357	static void
258	put_padlist (CV *cv)	358	put_padlist (pTHX_ CV *cv)
259	{	359	{
260	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	360	MAGIC *mg = CORO_MAGIC (cv);
		361	AV *av;
261		362
262	if (!mg)	363	if (!mg)
263	{	364	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	367	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	368	mg->mg_obj = (SV *)newAV ();
268	}	369	}
269		370
270	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	371	av = (AV *)mg->mg_obj;
271	}
272		372
273	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
274	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
275		375
276	#define LOAD(state) load_state((state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	#define SAVE(state,flags) save_state((state),(flags));	377	}
278		378
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	379	/ load & save, init *****************************************************/
280		380
281	static void	381	static void
282	load_state(Coro__State c)	382	load_perl (pTHX_ Coro__State c)
283	{	383	{
284	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
286		387
287	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
288	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
289	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
290	PL_stack_sp = c->stack_sp;	391	PL_defoutgv = c->deffh;
291	PL_op = c->op;	392	PL_rs = c->irssv;
292	PL_curpad = c->curpad;	393	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		394
322	{	395	{
323	dSP;	396	dSP;
324	CV *cv;	397	CV *cv;
325		398
326	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
328	{	401	{
329	AV padlist = (AV )POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
335	}	404	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	405	}
339		406
340	PUTBACK;	407	PUTBACK;
341	}	408	}
342	}	409	}
343		410
344	static void	411	static void
345	save_state(Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
346	{	413	{
347	{	414	{
348	dSP;	415	dSP;
349	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	420	/*
354	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
356	*/	423	*/
357		424
358	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
360	for (;;)	427	for (;;)
361	{	428	{
362	while (cxix >= 0)	429	while (cxix >= 0)
363	{	430	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
365		432
366	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
367	{	434	{
368	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
369	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
370	{	438	{
371	EXTEND (SP, CvDEPTH(cv)*2);	439	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));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
382		443
		444	CvDEPTH (cv) = 0;
383	get_padlist (cv);	445	get_padlist (aTHX_ cv);
384	}	446	}
385	}	447	}
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	}	448	}
395		449
396	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
397	break;	451	break;
398		452
399	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
402	}	456	}
403		457
404	PUTBACK;	458	PUTBACK;
405	}	459	}
406		460
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = PL_defoutgv;
		465	c->irssv = PL_rs;
		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	coro_destroy_stacks (aTHX);
		665	}
		666
		667	static void
		668	free_coro_mortal (pTHX)
		669	{
		670	if (coro_mortal)
		671	{
		672	SvREFCNT_dec (coro_mortal);
		673	coro_mortal = 0;
		674	}
		675	}
		676
		677	static int
		678	runops_trace (pTHX)
		679	{
		680	COP *oldcop = 0;
		681	int oldcxix = -2;
		682	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		683	coro_cctx *cctx = coro->cctx;
		684
		685	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		686	{
		687	PERL_ASYNC_CHECK ();
		688
		689	if (cctx->flags & CC_TRACE_ALL)
		690	{
		691	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		692	{
		693	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		694	SV bot, top;
		695	AV av = newAV (); / return values */
		696	SV **cb;
		697	dSP;
		698
		699	GV *gv = CvGV (cx->blk_sub.cv);
		700	SV *fullname = sv_2mortal (newSV (0));
		701	if (isGV (gv))
		702	gv_efullname3 (fullname, gv, 0);
		703
		704	bot = PL_stack_base + cx->blk_oldsp + 1;
		705	top = cx->blk_gimme == G_ARRAY ? SP + 1
		706	: cx->blk_gimme == G_SCALAR ? bot + 1
		707	: bot;
		708
		709	while (bot < top)
		710	av_push (av, SvREFCNT_inc (*bot++));
		711
		712	PL_runops = RUNOPS_DEFAULT;
		713	ENTER;
		714	SAVETMPS;
		715	EXTEND (SP, 3);
		716	PUSHMARK (SP);
		717	PUSHs (&PL_sv_no);
		718	PUSHs (fullname);
		719	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		720	PUTBACK;
		721	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		722	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		723	SPAGAIN;
		724	FREETMPS;
		725	LEAVE;
		726	PL_runops = runops_trace;
		727	}
		728
		729	if (oldcop != PL_curcop)
		730	{
		731	oldcop = PL_curcop;
		732
		733	if (PL_curcop != &PL_compiling)
		734	{
		735	SV **cb;
		736
		737	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		738	{
		739	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		740
		741	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		742	{
		743	runops_proc_t old_runops = PL_runops;
		744	dSP;
		745	GV *gv = CvGV (cx->blk_sub.cv);
		746	SV *fullname = sv_2mortal (newSV (0));
		747
		748	if (isGV (gv))
		749	gv_efullname3 (fullname, gv, 0);
		750
		751	PL_runops = RUNOPS_DEFAULT;
		752	ENTER;
		753	SAVETMPS;
		754	EXTEND (SP, 3);
		755	PUSHMARK (SP);
		756	PUSHs (&PL_sv_yes);
		757	PUSHs (fullname);
		758	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		759	PUTBACK;
		760	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		761	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		762	SPAGAIN;
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = runops_trace;
		766	}
		767
		768	oldcxix = cxstack_ix;
		769	}
		770
		771	if (cctx->flags & CC_TRACE_LINE)
		772	{
		773	dSP;
		774
		775	PL_runops = RUNOPS_DEFAULT;
		776	ENTER;
		777	SAVETMPS;
		778	EXTEND (SP, 3);
		779	PL_runops = RUNOPS_DEFAULT;
		780	PUSHMARK (SP);
		781	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		782	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		783	PUTBACK;
		784	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		785	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		786	SPAGAIN;
		787	FREETMPS;
		788	LEAVE;
		789	PL_runops = runops_trace;
		790	}
		791	}
		792	}
		793	}
		794	}
		795
		796	TAINT_NOT;
		797	return 0;
		798	}
		799
		800	/* inject a fake call to Coro::State::_cctx_init into the execution */
		801	/* _cctx_init should be careful, as it could be called at almost any time */
		802	/* during execution of a perl program */
		803	static void NOINLINE
		804	prepare_cctx (pTHX_ coro_cctx *cctx)
		805	{
549	dSP;	806	dSP;
550	UNOP myop;	807	LOGOP myop;
551	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
552		808
553	coro_init_stacks ();	809	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		810
559	SPAGAIN;	811	if (cctx->flags & CC_TRACE)
		812	PL_runops = runops_trace;
560		813
561	Zero (&myop, 1, UNOP);	814	Zero (&myop, 1, LOGOP);
562	myop.op_next = Nullop;	815	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID;	816	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
564		817
		818	PUSHMARK (SP);
		819	EXTEND (SP, 2);
		820	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		821	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		822	PUTBACK;
565	PL_op = (OP *)&myop;	823	PL_op = (OP *)&myop;
566
567	PUSHMARK(SP);
568	XPUSHs (sub_init);
569	PUTBACK;
570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	824	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571	SPAGAIN;	825	SPAGAIN;
572
573	ENTER; /* necessary e.g. for dounwind */
574	}	826	}
575		827
		828	/*
		829	* this is a _very_ stripped down perl interpreter ;)
		830	*/
576	static void	831	static void
577	free_coro_mortal ()	832	coro_run (void *arg)
578	{	833	{
579	if (coro_mortal)	834	dTHX;
580	{	835
581	SvREFCNT_dec (coro_mortal);	836	/* coro_run is the alternative tail of transfer(), so unlock here. */
582	coro_mortal = 0;	837	UNLOCK;
		838
		839	/* we now skip the entersub that lead to transfer() */
		840	PL_op = PL_op->op_next;
		841
		842	/* inject a fake subroutine call to cctx_init */
		843	prepare_cctx (aTHX_ (coro_cctx *)arg);
		844
		845	/* somebody or something will hit me for both perl_run and PL_restartop */
		846	PL_restartop = PL_op;
		847	perl_run (PL_curinterp);
		848
		849	/*
		850	* If perl-run returns we assume exit() was being called or the coro
		851	* fell off the end, which seems to be the only valid (non-bug)
		852	* reason for perl_run to return. We try to exit by jumping to the
		853	* bootstrap-time "top" top_env, as we cannot restore the "main"
		854	* coroutine as Coro has no such concept
		855	*/
		856	PL_top_env = main_top_env;
		857	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		858	}
		859
		860	static coro_cctx *
		861	cctx_new ()
		862	{
		863	coro_cctx *cctx;
		864	void *stack_start;
		865	size_t stack_size;
		866
		867	++cctx_count;
		868
		869	Newz (0, cctx, 1, coro_cctx);
		870
		871	#if HAVE_MMAP
		872
		873	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		874	/* mmap supposedly does allocate-on-write for us */
		875	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		876
		877	if (cctx->sptr != (void *)-1)
583	}	878	{
		879	# if CORO_STACKGUARD
		880	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		881	# endif
		882	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		883	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		884	cctx->flags \|= CC_MAPPED;
		885	}
		886	else
		887	#endif
		888	{
		889	cctx->ssize = coro_stacksize * (long)sizeof (long);
		890	New (0, cctx->sptr, coro_stacksize, long);
		891
		892	if (!cctx->sptr)
		893	{
		894	perror ("FATAL: unable to allocate stack for coroutine");
		895	_exit (EXIT_FAILURE);
		896	}
		897
		898	stack_start = cctx->sptr;
		899	stack_size = cctx->ssize;
		900	}
		901
		902	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		903	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		904
		905	return cctx;
584	}	906	}
		907
		908	static void
		909	cctx_destroy (coro_cctx *cctx)
		910	{
		911	if (!cctx)
		912	return;
		913
		914	--cctx_count;
		915
		916	#if CORO_USE_VALGRIND
		917	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		918	#endif
		919
		920	#if HAVE_MMAP
		921	if (cctx->flags & CC_MAPPED)
		922	munmap (cctx->sptr, cctx->ssize);
		923	else
		924	#endif
		925	Safefree (cctx->sptr);
		926
		927	Safefree (cctx);
		928	}
		929
		930	static coro_cctx *
		931	cctx_get (pTHX)
		932	{
		933	while (cctx_first)
		934	{
		935	coro_cctx *cctx = cctx_first;
		936	cctx_first = cctx->next;
		937	--cctx_idle;
		938
		939	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		940	return cctx;
		941
		942	cctx_destroy (cctx);
		943	}
		944
		945	return cctx_new ();
		946	}
		947
		948	static void
		949	cctx_put (coro_cctx *cctx)
		950	{
		951	/* free another cctx if overlimit */
		952	if (cctx_idle >= MAX_IDLE_CCTX)
		953	{
		954	coro_cctx *first = cctx_first;
		955	cctx_first = first->next;
		956	--cctx_idle;
		957
		958	cctx_destroy (first);
		959	}
		960
		961	++cctx_idle;
		962	cctx->next = cctx_first;
		963	cctx_first = cctx;
		964	}
		965
		966	/ coroutine switching ***************************************************/
585		967
586	static void NOINLINE	968	static void NOINLINE
587	prepare_cctx (coro_stack *cctx)	969	transfer_check (pTHX_ struct coro prev, struct coro next)
588	{	970	{
589	dSP;	971	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	{	972	{
693	stack = stack_new ();	973	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
694	PL_op = PL_op->op_next;	974	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		975
		976	if (next->flags & CF_RUNNING)
		977	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		978
		979	if (next->flags & CF_DESTROYED)
		980	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		981
		982	if (PL_lex_state != LEX_NOTPARSING)
		983	croak ("Coro::State::transfer called while parsing, but this is not supported");
695	}	984	}
696
697	return stack;
698	}	985	}
699		986
700	static void	987	/* 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	988	static void NOINLINE
709	transfer (struct coro prev, struct coro next, int flags)	989	transfer (pTHX_ struct coro prev, struct coro next)
710	{	990	{
711	dSTACKLEVEL;	991	dSTACKLEVEL;
712		992
713	/* sometimes transfer is only called to set idle_sp */	993	/* sometimes transfer is only called to set idle_sp */
714	if (flags == TRANSFER_SET_STACKLEVEL)	994	if (!next)
		995	{
715	((coro_stack *)prev)->idle_sp = STACKLEVEL;	996	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		997	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		998	}
716	else if (prev != next)	999	else if (prev != next)
717	{	1000	{
718	coro_stack *prev__stack;	1001	coro_cctx *prev__cctx;
		1002
		1003	if (prev->flags & CF_NEW)
		1004	{
		1005	/* create a new empty context */
		1006	Newz (0, prev->cctx, 1, coro_cctx);
		1007	prev->flags &= ~CF_NEW;
		1008	prev->flags \|= CF_RUNNING;
		1009	}
		1010
		1011	prev->flags &= ~CF_RUNNING;
		1012	next->flags \|= CF_RUNNING;
719		1013
720	LOCK;	1014	LOCK;
721		1015
722	if (next->mainstack)	1016	if (next->flags & CF_NEW)
723	{	1017	{
724	/* coroutine already started */	1018	/* need to start coroutine */
725	SAVE (prev, flags);	1019	next->flags &= ~CF_NEW;
726	LOAD (next);	1020	/* first get rid of the old state */
		1021	save_perl (aTHX_ prev);
		1022	/* setup coroutine call */
		1023	coro_setup (aTHX_ next);
727	}	1024	}
728	else	1025	else
729	{	1026	{
730	/* need to start coroutine */	1027	/* coroutine already started */
731	/* first get rid of the old state */	1028	save_perl (aTHX_ prev);
732	SAVE (prev, -1);	1029	load_perl (aTHX_ next);
733	/* setup coroutine call */
734	setup_coro (next);
735	/* need a stack */
736	next->stack = 0;
737	}	1030	}
738		1031
739	if (!prev->stack)
740	/* create a new empty context */
741	Newz (0, prev->stack, 1, coro_stack);
742
743	prev__stack = prev->stack;	1032	prev__cctx = prev->cctx;
744		1033
745	/* possibly "free" the stack */	1034	/* possibly "free" the cctx */
746	if (prev__stack->idle_sp == STACKLEVEL)	1035	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
747	{	1036	{
748	stack_put (prev__stack);	1037	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1038	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1039
749	prev->stack = 0;	1040	prev->cctx = 0;
		1041
		1042	cctx_put (prev__cctx);
750	}	1043	}
751		1044
		1045	++next->usecount;
		1046
752	if (!next->stack)	1047	if (!next->cctx)
753	next->stack = stack_get ();	1048	next->cctx = cctx_get (aTHX);
754		1049
755	if (prev__stack != next->stack)	1050	if (prev__cctx != next->cctx)
756	{	1051	{
757	prev__stack->top_env = PL_top_env;	1052	prev__cctx->top_env = PL_top_env;
758	PL_top_env = next->stack->top_env;	1053	PL_top_env = next->cctx->top_env;
759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1054	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
760	}	1055	}
761		1056
762	free_coro_mortal ();	1057	free_coro_mortal (aTHX);
763
764	UNLOCK;	1058	UNLOCK;
765	}	1059	}
766	}	1060	}
767		1061
768	struct transfer_args	1062	struct transfer_args
769	{	1063	{
770	struct coro prev, next;	1064	struct coro prev, next;
771	int flags;
772	};	1065	};
773		1066
774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1067	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1068	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
775		1069
		1070	/ high level stuff ******************************************************/
		1071
776	static void	1072	static int
777	coro_state_destroy (struct coro *coro)	1073	coro_state_destroy (pTHX_ struct coro *coro)
778	{	1074	{
779	if (coro->refcnt--)	1075	if (coro->flags & CF_DESTROYED)
780	return;	1076	return 0;
		1077
		1078	coro->flags \|= CF_DESTROYED;
		1079
		1080	if (coro->flags & CF_READY)
		1081	{
		1082	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1083	/* alternative: look through all ready queues and remove the coro */
		1084	LOCK;
		1085	--coro_nready;
		1086	UNLOCK;
		1087	}
		1088	else
		1089	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
781		1090
782	if (coro->mainstack && coro->mainstack != main_mainstack)	1091	if (coro->mainstack && coro->mainstack != main_mainstack)
783	{	1092	{
784	struct coro temp;	1093	struct coro temp;
785		1094
786	SAVE ((&temp), TRANSFER_SAVE_ALL);	1095	if (coro->flags & CF_RUNNING)
787	LOAD (coro);	1096	croak ("FATAL: tried to destroy currently running coroutine");
788		1097
789	destroy_stacks ();	1098	save_perl (aTHX_ &temp);
		1099	load_perl (aTHX_ coro);
790		1100
		1101	coro_destroy (aTHX_ coro);
		1102
791	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1103	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
792		1104
793	coro->mainstack = 0;	1105	coro->mainstack = 0;
794	}	1106	}
795		1107
796	stack_free (coro->stack);	1108	cctx_destroy (coro->cctx);
797	SvREFCNT_dec (coro->args);	1109	SvREFCNT_dec (coro->args);
798	Safefree (coro);	1110
		1111	if (coro->next) coro->next->prev = coro->prev;
		1112	if (coro->prev) coro->prev->next = coro->next;
		1113	if (coro == coro_first) coro_first = coro->next;
		1114
		1115	return 1;
799	}	1116	}
800		1117
801	static int	1118	static int
802	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1119	coro_state_free (pTHX_ SV sv, MAGIC mg)
803	{	1120	{
804	struct coro coro = (struct coro )mg->mg_ptr;	1121	struct coro coro = (struct coro )mg->mg_ptr;
805	mg->mg_ptr = 0;	1122	mg->mg_ptr = 0;
806		1123
		1124	coro->hv = 0;
		1125
		1126	if (--coro->refcnt < 0)
		1127	{
807	coro_state_destroy (coro);	1128	coro_state_destroy (aTHX_ coro);
		1129	Safefree (coro);
		1130	}
808		1131
809	return 0;	1132	return 0;
810	}	1133	}
811		1134
812	static int	1135	static int
…		…
819	return 0;	1142	return 0;
820	}	1143	}
821		1144
822	static MGVTBL coro_state_vtbl = {	1145	static MGVTBL coro_state_vtbl = {
823	0, 0, 0, 0,	1146	0, 0, 0, 0,
824	coro_state_clear,	1147	coro_state_free,
825	0,	1148	0,
826	#ifdef MGf_DUP	1149	#ifdef MGf_DUP
827	coro_state_dup,	1150	coro_state_dup,
		1151	#else
		1152	# define MGf_DUP 0
828	#endif	1153	#endif
829	};	1154	};
830		1155
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	1156	static void
854	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1157	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
855	{	1158	{
856	ta->prev = SvSTATE (prev);	1159	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1160	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;	1161	TRANSFER_CHECK (*ta);
859	}	1162	}
860		1163
861	static void	1164	static void
862	api_transfer (SV prev, SV next, int flags)	1165	api_transfer (SV prev_sv, SV next_sv)
863	{	1166	{
864	dTHX;	1167	dTHX;
865	struct transfer_args ta;	1168	struct transfer_args ta;
866		1169
867	prepare_transfer (&ta, prev, next, flags);	1170	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1171	TRANSFER (ta);
869	}	1172	}
870		1173
871	/ Coro ******************************************************************/	1174	/ Coro ******************************************************************/
872		1175
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	1176	static void
886	coro_enq (SV *sv)	1177	coro_enq (pTHX_ SV *coro_sv)
887	{	1178	{
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);	1179	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	1180	}
898		1181
899	static SV *	1182	static SV *
900	coro_deq (int min_prio)	1183	coro_deq (pTHX_ int min_prio)
901	{	1184	{
902	int prio = PRIO_MAX - PRIO_MIN;	1185	int prio = PRIO_MAX - PRIO_MIN;
903		1186
904	min_prio -= PRIO_MIN;	1187	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	1188	if (min_prio < 0)
906	min_prio = 0;	1189	min_prio = 0;
907		1190
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1191	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1192	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1193	return av_shift (coro_ready [prio]);
913	}
914		1194
915	return 0;	1195	return 0;
916	}	1196	}
917		1197
918	static void	1198	static int
919	api_ready (SV *coro)	1199	api_ready (SV *coro_sv)
920	{	1200	{
921	dTHX;	1201	dTHX;
		1202	struct coro *coro;
922		1203
923	if (SvROK (coro))	1204	if (SvROK (coro_sv))
924	coro = SvRV (coro);	1205	coro_sv = SvRV (coro_sv);
		1206
		1207	coro = SvSTATE (coro_sv);
		1208
		1209	if (coro->flags & CF_READY)
		1210	return 0;
		1211
		1212	coro->flags \|= CF_READY;
925		1213
926	LOCK;	1214	LOCK;
927	coro_enq (SvREFCNT_inc (coro));	1215	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1216	++coro_nready;
928	UNLOCK;	1217	UNLOCK;
929	}
930		1218
		1219	return 1;
		1220	}
		1221
931	static void	1222	static int
		1223	api_is_ready (SV *coro_sv)
		1224	{
		1225	dTHX;
		1226	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1227	}
		1228
		1229	static void
932	prepare_schedule (struct transfer_args *ta)	1230	prepare_schedule (pTHX_ struct transfer_args *ta)
933	{	1231	{
934	SV current, prev, *next;	1232	SV prev_sv, next_sv;
935
936	current = GvSV (coro_current);
937		1233
938	for (;;)	1234	for (;;)
939	{	1235	{
940	LOCK;	1236	LOCK;
941	next = coro_deq (PRIO_MIN);	1237	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1238
		1239	/* nothing to schedule: call the idle handler */
		1240	if (!next_sv)
		1241	{
		1242	dSP;
		1243	UNLOCK;
		1244
		1245	ENTER;
		1246	SAVETMPS;
		1247
		1248	PUSHMARK (SP);
		1249	PUTBACK;
		1250	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1251
		1252	FREETMPS;
		1253	LEAVE;
		1254	continue;
		1255	}
		1256
		1257	ta->next = SvSTATE (next_sv);
		1258
		1259	/* cannot transfer to destroyed coros, skip and look for next */
		1260	if (ta->next->flags & CF_DESTROYED)
		1261	{
		1262	UNLOCK;
		1263	SvREFCNT_dec (next_sv);
		1264	/* coro_nready is already taken care of by destroy */
		1265	continue;
		1266	}
		1267
		1268	--coro_nready;
942	UNLOCK;	1269	UNLOCK;
943
944	if (next)
945	break;	1270	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	}	1271	}
960	}
961
962	prev = SvRV (current);
963	SvRV (current) = next;
964		1272
965	/* free this only after the transfer */	1273	/* free this only after the transfer */
		1274	prev_sv = SvRV (coro_current);
		1275	ta->prev = SvSTATE (prev_sv);
		1276	TRANSFER_CHECK (*ta);
		1277	assert (ta->next->flags & CF_READY);
		1278	ta->next->flags &= ~CF_READY;
		1279	SvRV_set (coro_current, next_sv);
		1280
966	LOCK;	1281	LOCK;
967	free_coro_mortal ();	1282	free_coro_mortal (aTHX);
		1283	coro_mortal = prev_sv;
968	UNLOCK;	1284	UNLOCK;
969	coro_mortal = prev;
970
971	ta->prev = SvSTATE (prev);
972	ta->next = SvSTATE (next);
973	ta->flags = TRANSFER_SAVE_ALL;
974	}	1285	}
975		1286
976	static void	1287	static void
977	prepare_cede (struct transfer_args *ta)	1288	prepare_cede (pTHX_ struct transfer_args *ta)
978	{	1289	{
979	LOCK;	1290	api_ready (coro_current);
980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981	UNLOCK;
982
983	prepare_schedule (ta);	1291	prepare_schedule (aTHX_ ta);
		1292	}
		1293
		1294	static int
		1295	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1296	{
		1297	if (coro_nready)
		1298	{
		1299	SV *prev = SvRV (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	api_ready (prev);
		1302	return 1;
		1303	}
		1304	else
		1305	return 0;
984	}	1306	}
985		1307
986	static void	1308	static void
987	api_schedule (void)	1309	api_schedule (void)
988	{	1310	{
989	dTHX;	1311	dTHX;
990	struct transfer_args ta;	1312	struct transfer_args ta;
991		1313
992	prepare_schedule (&ta);	1314	prepare_schedule (aTHX_ &ta);
993	TRANSFER (ta);	1315	TRANSFER (ta);
994	}	1316	}
995		1317
996	static void	1318	static int
997	api_cede (void)	1319	api_cede (void)
998	{	1320	{
999	dTHX;	1321	dTHX;
1000	struct transfer_args ta;	1322	struct transfer_args ta;
1001		1323
1002	prepare_cede (&ta);	1324	prepare_cede (aTHX_ &ta);
		1325
		1326	if (ta.prev != ta.next)
		1327	{
1003	TRANSFER (ta);	1328	TRANSFER (ta);
		1329	return 1;
		1330	}
		1331	else
		1332	return 0;
1004	}	1333	}
1005		1334
		1335	static int
		1336	api_cede_notself (void)
		1337	{
		1338	dTHX;
		1339	struct transfer_args ta;
		1340
		1341	if (prepare_cede_notself (aTHX_ &ta))
		1342	{
		1343	TRANSFER (ta);
		1344	return 1;
		1345	}
		1346	else
		1347	return 0;
		1348	}
		1349
		1350	static void
		1351	api_trace (SV *coro_sv, int flags)
		1352	{
		1353	dTHX;
		1354	struct coro *coro = SvSTATE (coro_sv);
		1355
		1356	if (flags & CC_TRACE)
		1357	{
		1358	if (!coro->cctx)
		1359	coro->cctx = cctx_new ();
		1360	else if (!(coro->cctx->flags & CC_TRACE))
		1361	croak ("cannot enable tracing on coroutine with custom stack");
		1362
		1363	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1364	}
		1365	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1366	{
		1367	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1368
		1369	if (coro->flags & CF_RUNNING)
		1370	PL_runops = RUNOPS_DEFAULT;
		1371	else
		1372	coro->runops = RUNOPS_DEFAULT;
		1373	}
		1374	}
		1375
1006	MODULE = Coro::State PACKAGE = Coro::State	1376	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007		1377
1008	PROTOTYPES: DISABLE	1378	PROTOTYPES: DISABLE
1009		1379
1010	BOOT:	1380	BOOT:
1011	{	1381	{
1012	#ifdef USE_ITHREADS	1382	#ifdef USE_ITHREADS
1013	MUTEX_INIT (&coro_mutex);	1383	MUTEX_INIT (&coro_mutex);
1014	#endif	1384	#endif
1015	BOOT_PAGESIZE;	1385	BOOT_PAGESIZE;
1016		1386
		1387	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1388
1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1389	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018		1390
1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1394	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022		1395
1023	main_mainstack = PL_mainstack;	1396	main_mainstack = PL_mainstack;
		1397	main_top_env = PL_top_env;
		1398
		1399	while (main_top_env->je_prev)
		1400	main_top_env = main_top_env->je_prev;
1024		1401
1025	coroapi.ver = CORO_API_VERSION;	1402	coroapi.ver = CORO_API_VERSION;
1026	coroapi.transfer = api_transfer;	1403	coroapi.transfer = api_transfer;
1027		1404
1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1405	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1035	struct coro *coro;	1412	struct coro *coro;
1036	HV *hv;	1413	HV *hv;
1037	int i;	1414	int i;
1038		1415
1039	Newz (0, coro, 1, struct coro);	1416	Newz (0, coro, 1, struct coro);
1040	coro->args = newAV ();	1417	coro->args = newAV ();
		1418	coro->flags = CF_NEW;
1041		1419
		1420	if (coro_first) coro_first->prev = coro;
		1421	coro->next = coro_first;
		1422	coro_first = coro;
		1423
1042	hv = newHV ();	1424	coro->hv = hv = newHV ();
1043	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1425	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));	1426	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045		1427
1046	for (i = 1; i < items; i++)	1428	for (i = 1; i < items; i++)
1047	av_push (coro->args, newSVsv (ST (i)));	1429	av_push (coro->args, newSVsv (ST (i)));
1048
1049	/coro->mainstack = 0; //actual work is done inside transfer /
1050	/coro->stack = 0;/
1051	}	1430	}
1052	OUTPUT:	1431	OUTPUT:
1053	RETVAL	1432	RETVAL
1054		1433
		1434	# these not obviously related functions are all rolled into the same xs
		1435	# function to increase chances that they all will call transfer with the same
		1436	# stack offset
1055	void	1437	void
1056	_set_stacklevel (...)	1438	_set_stacklevel (...)
1057	ALIAS:	1439	ALIAS:
1058	Coro::State::transfer = 1	1440	Coro::State::transfer = 1
1059	Coro::schedule = 2	1441	Coro::schedule = 2
1060	Coro::cede = 3	1442	Coro::cede = 3
1061	Coro::Cont::yield = 4	1443	Coro::cede_notself = 4
1062	CODE:	1444	CODE:
1063	{	1445	{
1064	struct transfer_args ta;	1446	struct transfer_args ta;
1065		1447
1066	switch (ix)	1448	switch (ix)
1067	{	1449	{
1068	case 0:	1450	case 0:
1069	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1451	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1070	ta.next = 0;	1452	ta.next = 0;
1071	ta.flags = TRANSFER_SET_STACKLEVEL;
1072	break;	1453	break;
1073		1454
1074	case 1:	1455	case 1:
1075	if (items != 3)	1456	if (items != 2)
1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1457	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1077		1458
1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1459	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1079	break;	1460	break;
1080		1461
1081	case 2:	1462	case 2:
1082	prepare_schedule (&ta);	1463	prepare_schedule (aTHX_ &ta);
1083	break;	1464	break;
1084		1465
1085	case 3:	1466	case 3:
1086	prepare_cede (&ta);	1467	prepare_cede (aTHX_ &ta);
1087	break;	1468	break;
1088		1469
1089	case 4:	1470	case 4:
1090	{	1471	if (!prepare_cede_notself (aTHX_ &ta))
1091	SV *yieldstack;	1472	XSRETURN_EMPTY;
1092	SV *sv;
1093	AV *defav = GvAV (PL_defgv);
1094		1473
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;	1474	break;
1114
1115	}	1475	}
1116		1476
		1477	BARRIER;
1117	TRANSFER (ta);	1478	TRANSFER (ta);
1118	}
1119		1479
1120	void	1480	if (GIMME_V != G_VOID && ta.next != ta.prev)
1121	_clone_state_from (SV dst, SV src)	1481	XSRETURN_YES;
		1482	}
		1483
		1484	bool
		1485	_destroy (SV *coro_sv)
1122	CODE:	1486	CODE:
1123	{	1487	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1124	struct coro *coro_src = SvSTATE (src);	1488	OUTPUT:
1125		1489	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		1490
1132	void	1491	void
1133	_exit (code)	1492	_exit (code)
1134	int code	1493	int code
1135	PROTOTYPE: $	1494	PROTOTYPE: $
1136	CODE:	1495	CODE:
1137	_exit (code);	1496	_exit (code);
1138		1497
		1498	int
		1499	cctx_stacksize (int new_stacksize = 0)
		1500	CODE:
		1501	RETVAL = coro_stacksize;
		1502	if (new_stacksize)
		1503	coro_stacksize = new_stacksize;
		1504	OUTPUT:
		1505	RETVAL
		1506
		1507	int
		1508	cctx_count ()
		1509	CODE:
		1510	RETVAL = cctx_count;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
		1515	cctx_idle ()
		1516	CODE:
		1517	RETVAL = cctx_idle;
		1518	OUTPUT:
		1519	RETVAL
		1520
		1521	void
		1522	list ()
		1523	PPCODE:
		1524	{
		1525	struct coro *coro;
		1526	for (coro = coro_first; coro; coro = coro->next)
		1527	if (coro->hv)
		1528	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1529	}
		1530
		1531	void
		1532	call (Coro::State coro, SV *coderef)
		1533	ALIAS:
		1534	eval = 1
		1535	CODE:
		1536	{
		1537	if (coro->mainstack)
		1538	{
		1539	struct coro temp;
		1540	Zero (&temp, 1, struct coro);
		1541
		1542	if (!(coro->flags & CF_RUNNING))
		1543	{
		1544	save_perl (aTHX_ &temp);
		1545	load_perl (aTHX_ coro);
		1546	}
		1547
		1548	{
		1549	dSP;
		1550	ENTER;
		1551	SAVETMPS;
		1552	PUSHMARK (SP);
		1553	PUTBACK;
		1554	if (ix)
		1555	eval_sv (coderef, 0);
		1556	else
		1557	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1558	SPAGAIN;
		1559	FREETMPS;
		1560	LEAVE;
		1561	PUTBACK;
		1562	}
		1563
		1564	if (!(coro->flags & CF_RUNNING))
		1565	{
		1566	save_perl (aTHX_ coro);
		1567	load_perl (aTHX_ &temp);
		1568	}
		1569	}
		1570	}
		1571
		1572	SV *
		1573	is_ready (Coro::State coro)
		1574	PROTOTYPE: $
		1575	ALIAS:
		1576	is_ready = CF_READY
		1577	is_running = CF_RUNNING
		1578	is_new = CF_NEW
		1579	is_destroyed = CF_DESTROYED
		1580	CODE:
		1581	RETVAL = boolSV (coro->flags & ix);
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	void
		1586	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1587
		1588	SV *
		1589	has_stack (Coro::State coro)
		1590	PROTOTYPE: $
		1591	CODE:
		1592	RETVAL = boolSV (!!coro->cctx);
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	is_traced (Coro::State coro)
		1598	PROTOTYPE: $
		1599	CODE:
		1600	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	IV
		1605	rss (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	usecount = 1
		1609	CODE:
		1610	switch (ix)
		1611	{
		1612	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1613	case 1: RETVAL = coro->usecount; break;
		1614	}
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618
1139	MODULE = Coro::State PACKAGE = Coro	1619	MODULE = Coro::State PACKAGE = Coro
1140		1620
1141	BOOT:	1621	BOOT:
1142	{	1622	{
1143	int i;	1623	int i;
		1624
		1625	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1626	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1627	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1628
		1629	coro_current = get_sv ("Coro::current", FALSE);
		1630	SvREADONLY_on (coro_current);
1144		1631
1145	coro_stash = gv_stashpv ("Coro", TRUE);	1632	coro_stash = gv_stashpv ("Coro", TRUE);
1146		1633
1147	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1634	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1635	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1636	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1637	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1638	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1639	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153		1640
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--; )	1641	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158	coro_ready[i] = newAV ();	1642	coro_ready[i] = newAV ();
1159		1643
1160	{	1644	{
1161	SV *sv = perl_get_sv("Coro::API", 1);	1645	SV *sv = perl_get_sv("Coro::API", 1);
1162		1646
1163	coroapi.schedule = api_schedule;	1647	coroapi.schedule = api_schedule;
1164	coroapi.cede = api_cede;	1648	coroapi.cede = api_cede;
		1649	coroapi.cede_notself = api_cede_notself;
1165	coroapi.ready = api_ready;	1650	coroapi.ready = api_ready;
		1651	coroapi.is_ready = api_is_ready;
1166	coroapi.nready = &coro_nready;	1652	coroapi.nready = &coro_nready;
1167	coroapi.current = coro_current;	1653	coroapi.current = coro_current;
1168		1654
1169	GCoroAPI = &coroapi;	1655	GCoroAPI = &coroapi;
1170	sv_setiv (sv, (IV)&coroapi);	1656	sv_setiv (sv, (IV)&coroapi);
1171	SvREADONLY_on (sv);	1657	SvREADONLY_on (sv);
1172	}	1658	}
1173	}	1659	}
		1660
		1661	void
		1662	_set_current (SV *current)
		1663	PROTOTYPE: $
		1664	CODE:
		1665	SvREFCNT_dec (SvRV (coro_current));
		1666	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1174		1667
1175	int	1668	int
1176	prio (Coro::State coro, int newprio = 0)	1669	prio (Coro::State coro, int newprio = 0)
1177	ALIAS:	1670	ALIAS:
1178	nice = 1	1671	nice = 1
…		…
1181	RETVAL = coro->prio;	1674	RETVAL = coro->prio;
1182		1675
1183	if (items > 1)	1676	if (items > 1)
1184	{	1677	{
1185	if (ix)	1678	if (ix)
1186	newprio += coro->prio;	1679	newprio = coro->prio - newprio;
1187		1680
1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1681	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1682	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190		1683
1191	coro->prio = newprio;	1684	coro->prio = newprio;
1192	}	1685	}
1193	}	1686	}
		1687	OUTPUT:
		1688	RETVAL
1194		1689
1195	void	1690	SV *
1196	ready (SV *self)	1691	ready (SV *self)
1197	PROTOTYPE: $	1692	PROTOTYPE: $
1198	CODE:	1693	CODE:
1199	api_ready (self);	1694	RETVAL = boolSV (api_ready (self));
		1695	OUTPUT:
		1696	RETVAL
1200		1697
1201	int	1698	int
1202	nready (...)	1699	nready (...)
1203	PROTOTYPE:	1700	PROTOTYPE:
1204	CODE:	1701	CODE:
1205	RETVAL = coro_nready;	1702	RETVAL = coro_nready;
1206	OUTPUT:	1703	OUTPUT:
1207	RETVAL	1704	RETVAL
1208		1705
		1706	# for async_pool speedup
		1707	void
		1708	_pool_1 (SV *cb)
		1709	CODE:
		1710	{
		1711	int i, len;
		1712	HV hv = (HV )SvRV (coro_current);
		1713	AV *defav = GvAV (PL_defgv);
		1714	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1715	AV *invoke_av;
		1716
		1717	if (!invoke)
		1718	croak ("\3terminate\2\n");
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
		1737
		1738	void
		1739	_pool_2 (SV *cb)
		1740	CODE:
		1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1747	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1748	croak ("\3terminate\2\n");
		1749
		1750	av_clear (GvAV (PL_defgv));
		1751	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1752	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1753
		1754	coro->prio = 0;
		1755
		1756	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1757	api_trace (coro_current, 0);
		1758
		1759	av_push (av_async_pool, newSVsv (coro_current));
		1760	}
		1761
		1762
1209	MODULE = Coro::State PACKAGE = Coro::AIO	1763	MODULE = Coro::State PACKAGE = Coro::AIO
1210		1764
1211	SV *	1765	SV *
1212	_get_state ()	1766	_get_state ()
1213	CODE:	1767	CODE:
1214	{	1768	{
1215	struct {	1769	struct io_state *data;
1216	int errorno;
1217	int laststype;
1218	int laststatval;
1219	Stat_t statcache;
1220	} data;
1221		1770
		1771	RETVAL = newSV (sizeof (struct io_state));
		1772	data = (struct io_state *)SvPVX (RETVAL);
		1773	SvCUR_set (RETVAL, sizeof (struct io_state));
		1774	SvPOK_only (RETVAL);
		1775
1222	data.errorno = errno;	1776	data->errorno = errno;
1223	data.laststype = PL_laststype;	1777	data->laststype = PL_laststype;
1224	data.laststatval = PL_laststatval;	1778	data->laststatval = PL_laststatval;
1225	data.statcache = PL_statcache;	1779	data->statcache = PL_statcache;
1226
1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
1228	}	1780	}
1229	OUTPUT:	1781	OUTPUT:
1230	RETVAL	1782	RETVAL
1231		1783
1232	void	1784	void
1233	_set_state (char *data_)	1785	_set_state (char *data_)
1234	PROTOTYPE: $	1786	PROTOTYPE: $
1235	CODE:	1787	CODE:
1236	{	1788	{
1237	struct {	1789	struct io_state data = (void )data_;
1238	int errorno;
1239	int laststype;
1240	int laststatval;
1241	Stat_t statcache;
1242	} data = (void )data_;
1243		1790
1244	errno = data->errorno;	1791	errno = data->errorno;
1245	PL_laststype = data->laststype;	1792	PL_laststype = data->laststype;
1246	PL_laststatval = data->laststatval;	1793	PL_laststatval = data->laststatval;
1247	PL_statcache = data->statcache;	1794	PL_statcache = data->statcache;
1248	}	1795	}
		1796

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Comparing Coro/Coro/State.xs (file contents): Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs. Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC