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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.179 by root, Wed Oct 3 16:03:17 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
61	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* 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. */
66	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		111
77	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	116	#else
82	# define LOCK (void)0	117	# define LOCK (void)0
83	# define UNLOCK (void)0	118	# define UNLOCK (void)0
84	#endif	119	#endif
85		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;
86	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
87	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;
88	static HV coro_state_stash, coro_stash;	134	static HV coro_state_stash, coro_stash;
89	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
90		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
91	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	157	typedef struct coro_cctx {
93	struct coro_stack *next;	158	struct coro_cctx *next;
94		159
95	/* the stack */	160	/* the stack */
96	void *sptr;	161	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
98		163
99	/* cpu state */	164	/* cpu state */
100	void idle_sp; / original stacklevel when coroutine was created */	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 */
101	JMPENV *top_env;	167	JMPENV *top_env;
102	coro_context cctx;	168	coro_context cctx;
103	} coro_stack;
104		169
105	/* the (fake) coro_stack representing the main program */	170	#if CORO_USE_VALGRIND
106	static coro_stack *main_stack;	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	};
107		182
108	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
109	struct coro {	184	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	186	coro_cctx *cctx;
112		187
113	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
114	AV *args;	189	AV *args;
115	int refcnt;	190	int refcnt;
		191	int flags; /* CF_ flags */
116		192
117	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
118	AV *defav;	194	AV defav; / @_ */
119	SV *defsv;	195	SV defsv; / $_ */
120	SV *errsv;	196	SV errsv; / $@ */
		197	IO deffh; / default filehandle */
		198	SV irssv; / $/ */
		199	SV irssv_sv; / real $/ cache */
121		200
122	/* saved global state not related to stacks */	201	#define VAR(name,type) type name;
123	U8 dowarn;	202	# include "state.h"
124	I32 in_eval;	203	#undef VAR
125		204
126	/* the stacks and related info (callchain etc..) */	205	/* statistics */
127	PERL_SI *curstackinfo;	206	int usecount; /* number of switches to this coro */
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		207
156	/* coro process data */	208	/* coro process data */
157	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 */
158	};	214	};
159		215
160	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
162		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
163	static AV *	236	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
165	{	238	{
166	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
167	AV newpadlist, newpad;	240	AV newpadlist, newpad;
168		241
169	newpadlist = newAV ();	242	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	243	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	244	#if PERL_VERSION_ATLEAST (5,9,0)
		245	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		246	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	247	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	248	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	249	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	250	--AvFILLp (padlist);
178		251
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	252	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
223		296
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	297	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		298
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		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
228	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
229	static void	335	static void
230	get_padlist (pTHX_ CV *cv)	336	get_padlist (pTHX_ CV *cv)
231	{	337	{
232	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
233		340
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	343	else
237	{	344	{
238	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
239	/* this should work - but it doesn't :( */	346	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	347	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
244	#else	351	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
248	}	355	}
249		356
250	static void	357	static void
251	put_padlist (pTHX_ CV *cv)	358	put_padlist (pTHX_ CV *cv)
252	{	359	{
253	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	360	MAGIC *mg = CORO_MAGIC (cv);
		361	AV *av;
254		362
255	if (!mg)	363	if (!mg)
256	{	364	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	367	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	368	mg->mg_obj = (SV *)newAV ();
261	}	369	}
262		370
263	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	371	av = (AV *)mg->mg_obj;
264	}
265		372
266	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
267	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
268		375
269	#define LOAD(state) load_state(aTHX_ (state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	377	}
271		378
272	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	379	/ load & save, init *****************************************************/
273		380
274	static void	381	static void
275	load_state(pTHX_ Coro__State c)	382	load_perl (pTHX_ Coro__State c)
276	{	383	{
277	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
279		387
280	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
281	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
282	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
283	PL_stack_sp = c->stack_sp;	391	GvIOp(PL_defoutgv) = c->deffh;
284	PL_op = c->op;	392	PL_rs = c->irssv;
285	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
314		394
315	{	395	{
316	dSP;	396	dSP;
317	CV *cv;	397	CV *cv;
318		398
319	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
321	{	401	{
322	AV padlist = (AV )POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
328	}	404	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	405	}
332		406
333	PUTBACK;	407	PUTBACK;
334	}	408	}
335	}	409	}
336		410
337	static void	411	static void
338	save_state(pTHX_ Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
339	{	413	{
340	{	414	{
341	dSP;	415	dSP;
342	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	420	/*
347	* 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
348	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
349	*/	423	*/
350		424
351	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
353	for (;;)	427	for (;;)
354	{	428	{
355	while (cxix >= 0)	429	while (cxix >= 0)
356	{	430	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
358		432
359	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
360	{	434	{
361	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
362	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
363	{	438	{
364	EXTEND (SP, CvDEPTH(cv)*2);	439	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
375		443
		444	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	445	get_padlist (aTHX_ cv);
377	}	446	}
378	}	447	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	448	}
388		449
389	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
390	break;	451	break;
391		452
392	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
395	}	456	}
396		457
397	PUTBACK;	458	PUTBACK;
398	}	459	}
399		460
400	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
402	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = GvIOp (PL_defoutgv);
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
403		467
404	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	469	# include "state.h"
406		470	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	471	}
438		472
439	/*	473	/*
440	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
444	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
445	static void	482	static void
446	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
447	{	484	{
448	LOCK;	485	PL_curstackinfo = new_stackinfo(64, 6);
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		489
455	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		493
459	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
460	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	497	PL_tmps_max = 64;
463		498
464	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
467		502
…		…
471		506
472	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
475		510
476	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	513	PL_savestack_max = 64;
479		514
480	#if PERL_VERSION < 9	515	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	518	PL_retstack_max = 4;
484	#endif	519	#endif
485
486	UNLOCK;
487	}	520	}
		521	#endif
488		522
489	/*	523	/*
490	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
491	*/	525	*/
492	static void	526	static void
493	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
494	{	528	{
495	if (!IN_DESTRUCT)
496	{
497	/* is this ugly, I ask? */
498	LEAVE_SCOPE (0);
499
500	/* sure it is, but more important: is it correct?? :/ */
501	FREETMPS;
502
503	/POPSTACK_TO (PL_mainstack);//D//use/
504	}
505
506	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
508		531
509	while (PL_curstackinfo)	532	while (PL_curstackinfo)
510	{	533	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
512		535
513	{ /D//remove/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/D//remove/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		538
525	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	541	PL_curstackinfo = p;
528	}	542	}
529		543
530	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	545	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	547	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	549	Safefree (PL_retstack);
536	#endif	550	#endif
537	}	551	}
538		552
539	static void	553	static size_t
540	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)
541	{	588	{
542	/*	589	/*
543	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
544	*/	591	*/
545	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), irsgv, PERL_MAGIC_sv, "/", 1);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	GvIOp(PL_defoutgv) = io;
		612	IoTYPE (io) = IoTYPE_WRONLY;
		613	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		614	IoFLAGS (io) \|= IOf_FLUSH;
		615	}
		616
		617	{
		618	dSP;
		619	LOGOP myop;
		620
		621	Zero (&myop, 1, LOGOP);
		622	myop.op_next = Nullop;
		623	myop.op_flags = OPf_WANT_VOID;
		624
		625	PUSHMARK (SP);
		626	XPUSHs (av_shift (GvAV (PL_defgv)));
		627	PUTBACK;
		628	PL_op = (OP *)&myop;
		629	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		630	SPAGAIN;
		631	}
		632
		633	ENTER; /* necessary e.g. for dounwind */
		634	}
		635
		636	static void
		637	coro_destroy (pTHX_ struct coro *coro)
		638	{
		639	if (!IN_DESTRUCT)
		640	{
		641	/* restore all saved variables and stuff */
		642	LEAVE_SCOPE (0);
		643	assert (PL_tmps_floor == -1);
		644
		645	/* free all temporaries */
		646	FREETMPS;
		647	assert (PL_tmps_ix == -1);
		648
		649	/* unwind all extra stacks */
		650	POPSTACK_TO (PL_mainstack);
		651
		652	/* unwind main stack */
		653	dounwind (-1);
		654	}
		655
		656	SvREFCNT_dec (GvSV (PL_defgv));
		657	SvREFCNT_dec (GvAV (PL_defgv));
		658	SvREFCNT_dec (GvSV (PL_errgv));
		659	SvREFCNT_dec (GvIOp(PL_defoutgv));
		660	SvREFCNT_dec (PL_rs);
		661	SvREFCNT_dec (GvSV (irsgv));
		662
		663	coro_destroy_stacks (aTHX);
		664	}
		665
		666	static void
		667	free_coro_mortal (pTHX)
		668	{
		669	if (coro_mortal)
		670	{
		671	SvREFCNT_dec (coro_mortal);
		672	coro_mortal = 0;
		673	}
		674	}
		675
		676	static int
		677	runops_trace (pTHX)
		678	{
		679	COP *oldcop = 0;
		680	int oldcxix = -2;
		681	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		682	coro_cctx *cctx = coro->cctx;
		683
		684	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		685	{
		686	PERL_ASYNC_CHECK ();
		687
		688	if (cctx->flags & CC_TRACE_ALL)
		689	{
		690	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		691	{
		692	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		693	SV bot, top;
		694	AV av = newAV (); / return values */
		695	SV **cb;
		696	dSP;
		697
		698	GV *gv = CvGV (cx->blk_sub.cv);
		699	SV *fullname = sv_2mortal (newSV (0));
		700	if (isGV (gv))
		701	gv_efullname3 (fullname, gv, 0);
		702
		703	bot = PL_stack_base + cx->blk_oldsp + 1;
		704	top = cx->blk_gimme == G_ARRAY ? SP + 1
		705	: cx->blk_gimme == G_SCALAR ? bot + 1
		706	: bot;
		707
		708	while (bot < top)
		709	av_push (av, SvREFCNT_inc (*bot++));
		710
		711	PL_runops = RUNOPS_DEFAULT;
		712	ENTER;
		713	SAVETMPS;
		714	EXTEND (SP, 3);
		715	PUSHMARK (SP);
		716	PUSHs (&PL_sv_no);
		717	PUSHs (fullname);
		718	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		719	PUTBACK;
		720	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		721	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		722	SPAGAIN;
		723	FREETMPS;
		724	LEAVE;
		725	PL_runops = runops_trace;
		726	}
		727
		728	if (oldcop != PL_curcop)
		729	{
		730	oldcop = PL_curcop;
		731
		732	if (PL_curcop != &PL_compiling)
		733	{
		734	SV **cb;
		735
		736	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		737	{
		738	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		739
		740	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		741	{
		742	runops_proc_t old_runops = PL_runops;
		743	dSP;
		744	GV *gv = CvGV (cx->blk_sub.cv);
		745	SV *fullname = sv_2mortal (newSV (0));
		746
		747	if (isGV (gv))
		748	gv_efullname3 (fullname, gv, 0);
		749
		750	PL_runops = RUNOPS_DEFAULT;
		751	ENTER;
		752	SAVETMPS;
		753	EXTEND (SP, 3);
		754	PUSHMARK (SP);
		755	PUSHs (&PL_sv_yes);
		756	PUSHs (fullname);
		757	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		758	PUTBACK;
		759	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		760	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		761	SPAGAIN;
		762	FREETMPS;
		763	LEAVE;
		764	PL_runops = runops_trace;
		765	}
		766
		767	oldcxix = cxstack_ix;
		768	}
		769
		770	if (cctx->flags & CC_TRACE_LINE)
		771	{
		772	dSP;
		773
		774	PL_runops = RUNOPS_DEFAULT;
		775	ENTER;
		776	SAVETMPS;
		777	EXTEND (SP, 3);
		778	PL_runops = RUNOPS_DEFAULT;
		779	PUSHMARK (SP);
		780	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		781	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		782	PUTBACK;
		783	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		784	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		785	SPAGAIN;
		786	FREETMPS;
		787	LEAVE;
		788	PL_runops = runops_trace;
		789	}
		790	}
		791	}
		792	}
		793	}
		794
		795	TAINT_NOT;
		796	return 0;
		797	}
		798
		799	/* inject a fake call to Coro::State::_cctx_init into the execution */
		800	/* _cctx_init should be careful, as it could be called at almost any time */
		801	/* during execution of a perl program */
		802	static void NOINLINE
		803	prepare_cctx (pTHX_ coro_cctx *cctx)
		804	{
546	dSP;	805	dSP;
547	UNOP myop;	806	LOGOP myop;
548	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
549		807
550	coro_init_stacks (aTHX);	808	PL_top_env = &PL_start_env;
551	/PL_curcop = 0;/
552	/PL_in_eval = PL_in_eval;/ /* inherit */
553	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;
555		809
556	SPAGAIN;	810	if (cctx->flags & CC_TRACE)
		811	PL_runops = runops_trace;
557		812
558	Zero (&myop, 1, UNOP);	813	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	814	myop.op_next = PL_op;
560	myop.op_flags = OPf_WANT_VOID;	815	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
561		816
		817	PUSHMARK (SP);
		818	EXTEND (SP, 2);
		819	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		820	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		821	PUTBACK;
562	PL_op = (OP *)&myop;	822	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	824	SPAGAIN;
569
570	ENTER; /* necessary e.g. for dounwind */
571	}	825	}
572		826
573	static void	827	/*
574	free_coro_mortal ()	828	* this is a _very_ stripped down perl interpreter ;)
575	{	829	*/
576	if (coro_mortal)
577	{
578	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;
580	}
581	}
582
583	static void	830	static void
584	coro_run (void *arg)	831	coro_run (void *arg)
585	{	832	{
		833	dTHX;
		834
		835	/* coro_run is the alternative tail of transfer(), so unlock here. */
		836	UNLOCK;
		837
		838	/* we now skip the entersub that lead to transfer() */
		839	PL_op = PL_op->op_next;
		840
		841	/* inject a fake subroutine call to cctx_init */
		842	prepare_cctx (aTHX_ (coro_cctx *)arg);
		843
		844	/* somebody or something will hit me for both perl_run and PL_restartop */
		845	PL_restartop = PL_op;
		846	perl_run (PL_curinterp);
		847
586	/*	848	/*
587	* this is a _very_ stripped down perl interpreter ;)	849	* If perl-run returns we assume exit() was being called or the coro
		850	* fell off the end, which seems to be the only valid (non-bug)
		851	* reason for perl_run to return. We try to exit by jumping to the
		852	* bootstrap-time "top" top_env, as we cannot restore the "main"
		853	* coroutine as Coro has no such concept
588	*/	854	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	855	PL_top_env = main_top_env;
594		856	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
597
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */
602	perl_run (aTHX_ PERL_GET_CONTEXT);
603
604	abort ();
605	}	857	}
606		858
607	static coro_stack *	859	static coro_cctx *
608	stack_new ()	860	cctx_new ()
609	{	861	{
610	coro_stack *stack;	862	coro_cctx *cctx;
		863	void *stack_start;
		864	size_t stack_size;
611		865
		866	++cctx_count;
		867
612	New (0, stack, 1, coro_stack);	868	Newz (0, cctx, 1, coro_cctx);
613		869
614	#if HAVE_MMAP	870	#if HAVE_MMAP
615		871
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	872	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		873	/* mmap supposedly does allocate-on-write for us */
617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	874	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
618		875
619	if (stack->sptr == (void *)-1)	876	if (cctx->sptr != (void *)-1)
		877	{
		878	# if CORO_STACKGUARD
		879	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		880	# endif
		881	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		882	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		883	cctx->flags \|= CC_MAPPED;
620	{	884	}
		885	else
		886	#endif
		887	{
		888	cctx->ssize = coro_stacksize * (long)sizeof (long);
		889	New (0, cctx->sptr, coro_stacksize, long);
		890
		891	if (!cctx->sptr)
		892	{
621	perror ("FATAL: unable to mmap stack for coroutine");	893	perror ("FATAL: unable to allocate stack for coroutine");
622	_exit (EXIT_FAILURE);	894	_exit (EXIT_FAILURE);
623	}	895	}
624		896
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	897	stack_start = cctx->sptr;
626		898	stack_size = cctx->ssize;
627	#else
628
629	stack->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);
631
632	if (!stack->sptr)
633	{	899	}
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);
636	}
637		900
638	#endif	901	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
639
640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	902	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
641		903
642	return stack;	904	return cctx;
643	}	905	}
644		906
645	static void	907	static void
646	stack_free (coro_stack *stack)	908	cctx_destroy (coro_cctx *cctx)
647	{	909	{
648	if (!stack \|\| stack == main_stack)	910	if (!cctx)
649	return;	911	return;
650		912
		913	--cctx_count;
		914
		915	#if CORO_USE_VALGRIND
		916	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		917	#endif
		918
651	#if HAVE_MMAP	919	#if HAVE_MMAP
		920	if (cctx->flags & CC_MAPPED)
652	munmap (stack->sptr, stack->ssize);	921	munmap (cctx->sptr, cctx->ssize);
653	#else
654	Safefree (stack->sptr);
655	#endif
656
657	Safefree (stack);
658	}
659
660	static coro_stack *stack_first;
661
662	static coro_stack *
663	stack_get ()
664	{
665	coro_stack *stack;
666
667	if (stack_first)
668	{
669	stack = stack_first;
670	stack_first = stack->next;
671	}
672	else	922	else
		923	#endif
		924	Safefree (cctx->sptr);
		925
		926	Safefree (cctx);
		927	}
		928
		929	static coro_cctx *
		930	cctx_get (pTHX)
		931	{
		932	while (cctx_first)
673	{	933	{
674	stack = stack_new ();	934	coro_cctx *cctx = cctx_first;
675	PL_op = PL_op->op_next;	935	cctx_first = cctx->next;
		936	--cctx_idle;
		937
		938	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		939	return cctx;
		940
		941	cctx_destroy (cctx);
676	}	942	}
677		943
678	return stack;	944	return cctx_new ();
679	}	945	}
680		946
681	static void	947	static void
682	stack_put (coro_stack *stack)	948	cctx_put (coro_cctx *cctx)
683	{	949	{
684	stack->next = stack_first;	950	/* free another cctx if overlimit */
685	stack_first = stack;	951	if (cctx_idle >= MAX_IDLE_CCTX)
686	}	952	{
		953	coro_cctx *first = cctx_first;
		954	cctx_first = first->next;
		955	--cctx_idle;
687		956
688	/* never call directly, always through the coro_state_transfer global variable */	957	cctx_destroy (first);
689	static void	958	}
		959
		960	++cctx_idle;
		961	cctx->next = cctx_first;
		962	cctx_first = cctx;
		963	}
		964
		965	/ coroutine switching ***************************************************/
		966
		967	static void NOINLINE
		968	transfer_check (pTHX_ struct coro prev, struct coro next)
		969	{
		970	if (prev != next)
		971	{
		972	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		973	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		974
		975	if (next->flags & CF_RUNNING)
		976	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		977
		978	if (next->flags & CF_DESTROYED)
		979	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		980
		981	if (PL_lex_state != LEX_NOTPARSING)
		982	croak ("Coro::State::transfer called while parsing, but this is not supported");
		983	}
		984	}
		985
		986	/* always use the TRANSFER macro */
		987	static void NOINLINE
690	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	988	transfer (pTHX_ struct coro prev, struct coro next)
691	{	989	{
692	dSTACKLEVEL;	990	dSTACKLEVEL;
693		991
694	/* sometimes transfer is only called to set idle_sp */	992	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	993	if (!next)
		994	{
696	((coro_stack *)prev)->idle_sp = STACKLEVEL;	995	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		996	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		997	}
697	else if (prev != next)	998	else if (prev != next)
698	{	999	{
699	coro_stack *prev__stack;	1000	coro_cctx *prev__cctx;
		1001
		1002	if (prev->flags & CF_NEW)
		1003	{
		1004	/* create a new empty context */
		1005	Newz (0, prev->cctx, 1, coro_cctx);
		1006	prev->flags &= ~CF_NEW;
		1007	prev->flags \|= CF_RUNNING;
		1008	}
		1009
		1010	prev->flags &= ~CF_RUNNING;
		1011	next->flags \|= CF_RUNNING;
700		1012
701	LOCK;	1013	LOCK;
702		1014
703	if (next->mainstack)	1015	if (next->flags & CF_NEW)
704	{	1016	{
705	/* coroutine already started */	1017	/* need to start coroutine */
706	SAVE (prev, flags);	1018	next->flags &= ~CF_NEW;
707	LOAD (next);	1019	/* first get rid of the old state */
		1020	save_perl (aTHX_ prev);
		1021	/* setup coroutine call */
		1022	coro_setup (aTHX_ next);
708	}	1023	}
709	else	1024	else
710	{	1025	{
711	/* need to start coroutine */	1026	/* coroutine already started */
712	/* first get rid of the old state */	1027	save_perl (aTHX_ prev);
713	SAVE (prev, -1);	1028	load_perl (aTHX_ next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	1029	}
719		1030
720	prev__stack = prev->stack;	1031	prev__cctx = prev->cctx;
721		1032
722	/* possibly "free" the stack */	1033	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	1034	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
724	{	1035	{
725	stack_put (prev__stack);	1036	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1037	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1038
726	prev->stack = 0;	1039	prev->cctx = 0;
		1040
		1041	cctx_put (prev__cctx);
727	}	1042	}
728		1043
		1044	++next->usecount;
		1045
729	if (!next->stack)	1046	if (!next->cctx)
730	next->stack = stack_get ();	1047	next->cctx = cctx_get (aTHX);
731		1048
732	if (prev__stack != next->stack)	1049	if (prev__cctx != next->cctx)
733	{	1050	{
734	prev__stack->top_env = PL_top_env;	1051	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->stack->top_env;	1052	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1053	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	1054	}
738		1055
739	free_coro_mortal ();	1056	free_coro_mortal (aTHX);
740
741	UNLOCK;	1057	UNLOCK;
742	}	1058	}
743	}	1059	}
744		1060
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	1061	struct transfer_args
751	{	1062	{
752	struct coro prev, next;	1063	struct coro prev, next;
753	int flags;
754	};	1064	};
755		1065
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1066	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1067	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
757		1068
		1069	/ high level stuff ******************************************************/
		1070
758	static void	1071	static int
759	coro_state_destroy (struct coro *coro)	1072	coro_state_destroy (pTHX_ struct coro *coro)
760	{	1073	{
761	if (coro->refcnt--)	1074	if (coro->flags & CF_DESTROYED)
762	return;	1075	return 0;
		1076
		1077	coro->flags \|= CF_DESTROYED;
		1078
		1079	if (coro->flags & CF_READY)
		1080	{
		1081	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1082	/* alternative: look through all ready queues and remove the coro */
		1083	LOCK;
		1084	--coro_nready;
		1085	UNLOCK;
		1086	}
		1087	else
		1088	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
763		1089
764	if (coro->mainstack && coro->mainstack != main_mainstack)	1090	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	1091	{
766	struct coro temp;	1092	struct coro temp;
767		1093
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1094	if (coro->flags & CF_RUNNING)
		1095	croak ("FATAL: tried to destroy currently running coroutine");
		1096
		1097	save_perl (aTHX_ &temp);
769	LOAD (aTHX_ coro);	1098	load_perl (aTHX_ coro);
770		1099
771	destroy_stacks (aTHX);	1100	coro_destroy (aTHX_ coro);
772		1101
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1102	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
774		1103
775	coro->mainstack = 0;	1104	coro->mainstack = 0;
776	}	1105	}
777		1106
778	stack_free (coro->stack);	1107	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	1108	SvREFCNT_dec (coro->args);
780	Safefree (coro);	1109
		1110	if (coro->next) coro->next->prev = coro->prev;
		1111	if (coro->prev) coro->prev->next = coro->next;
		1112	if (coro == coro_first) coro_first = coro->next;
		1113
		1114	return 1;
781	}	1115	}
782		1116
783	static int	1117	static int
784	coro_state_clear (SV sv, MAGIC mg)	1118	coro_state_free (pTHX_ SV sv, MAGIC mg)
785	{	1119	{
786	struct coro coro = (struct coro )mg->mg_ptr;	1120	struct coro coro = (struct coro )mg->mg_ptr;
787	mg->mg_ptr = 0;	1121	mg->mg_ptr = 0;
788		1122
		1123	coro->hv = 0;
		1124
		1125	if (--coro->refcnt < 0)
		1126	{
789	coro_state_destroy (coro);	1127	coro_state_destroy (aTHX_ coro);
		1128	Safefree (coro);
		1129	}
790		1130
791	return 0;	1131	return 0;
792	}	1132	}
793		1133
794	static int	1134	static int
795	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1135	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
796	{	1136	{
797	struct coro coro = (struct coro )mg->mg_ptr;	1137	struct coro coro = (struct coro )mg->mg_ptr;
798		1138
799	++coro->refcnt;	1139	++coro->refcnt;
800		1140
801	return 0;	1141	return 0;
802	}	1142	}
803		1143
804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1144	static MGVTBL coro_state_vtbl = {
		1145	0, 0, 0, 0,
		1146	coro_state_free,
		1147	0,
		1148	#ifdef MGf_DUP
		1149	coro_state_dup,
		1150	#else
		1151	# define MGf_DUP 0
		1152	#endif
		1153	};
805		1154
806	static struct coro *
807	SvSTATE (SV *coro)
808	{
809	HV *stash;
810	MAGIC *mg;
811
812	if (SvROK (coro))
813	coro = SvRV (coro);
814
815	stash = SvSTASH (coro);
816	if (stash != coro_stash && stash != coro_state_stash)
817	{
818	/* very slow, but rare, check */
819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820	croak ("Coro::State object required");
821	}
822
823	mg = SvMAGIC (coro);
824	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;
826	}
827
828	static void	1155	static void
829	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)	1156	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
830	{	1157	{
831	ta->prev = SvSTATE (prev);	1158	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	1159	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;	1160	TRANSFER_CHECK (*ta);
834	}	1161	}
835		1162
836	static void	1163	static void
837	api_transfer (SV prev, SV next, int flags)	1164	api_transfer (SV prev_sv, SV next_sv)
838	{	1165	{
839	dTHX;	1166	dTHX;
840	struct transfer_args ta;	1167	struct transfer_args ta;
841		1168
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	1169	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
843	TRANSFER (ta);	1170	TRANSFER (ta);
844	}	1171	}
845		1172
846	/ Coro ******************************************************************/	1173	/ Coro ******************************************************************/
847		1174
848	#define PRIO_MAX 3
849	#define PRIO_HIGH 1
850	#define PRIO_NORMAL 0
851	#define PRIO_LOW -1
852	#define PRIO_IDLE -3
853	#define PRIO_MIN -4
854
855	/* for Coro.pm */
856	static GV coro_current, coro_idle;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;
859
860	static void	1175	static void
861	coro_enq (pTHX_ SV *sv)	1176	coro_enq (pTHX_ SV *coro_sv)
862	{	1177	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	1178	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;
872	}	1179	}
873		1180
874	static SV *	1181	static SV *
875	coro_deq (pTHX_ int min_prio)	1182	coro_deq (pTHX_ int min_prio)
876	{	1183	{
…		…
880	if (min_prio < 0)	1187	if (min_prio < 0)
881	min_prio = 0;	1188	min_prio = 0;
882		1189
883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1190	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
884	if (AvFILLp (coro_ready [prio]) >= 0)	1191	if (AvFILLp (coro_ready [prio]) >= 0)
885	{
886	coro_nready--;
887	return av_shift (coro_ready [prio]);	1192	return av_shift (coro_ready [prio]);
888	}
889		1193
890	return 0;	1194	return 0;
891	}	1195	}
892		1196
893	static void	1197	static int
894	api_ready (SV *coro)	1198	api_ready (SV *coro_sv)
895	{	1199	{
896	dTHX;	1200	dTHX;
		1201	struct coro *coro;
897		1202
898	if (SvROK (coro))	1203	if (SvROK (coro_sv))
899	coro = SvRV (coro);	1204	coro_sv = SvRV (coro_sv);
		1205
		1206	coro = SvSTATE (coro_sv);
		1207
		1208	if (coro->flags & CF_READY)
		1209	return 0;
		1210
		1211	coro->flags \|= CF_READY;
900		1212
901	LOCK;	1213	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	1214	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1215	++coro_nready;
903	UNLOCK;	1216	UNLOCK;
904	}
905		1217
		1218	return 1;
		1219	}
		1220
906	static void	1221	static int
		1222	api_is_ready (SV *coro_sv)
		1223	{
		1224	dTHX;
		1225	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1226	}
		1227
		1228	static void
907	prepare_schedule (aTHX_ struct transfer_args *ta)	1229	prepare_schedule (pTHX_ struct transfer_args *ta)
908	{	1230	{
909	SV current, prev, *next;	1231	SV prev_sv, next_sv;
		1232
		1233	for (;;)
		1234	{
		1235	LOCK;
		1236	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1237
		1238	/* nothing to schedule: call the idle handler */
		1239	if (!next_sv)
		1240	{
		1241	dSP;
		1242	UNLOCK;
		1243
		1244	ENTER;
		1245	SAVETMPS;
		1246
		1247	PUSHMARK (SP);
		1248	PUTBACK;
		1249	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1250
		1251	FREETMPS;
		1252	LEAVE;
		1253	continue;
		1254	}
		1255
		1256	ta->next = SvSTATE (next_sv);
		1257
		1258	/* cannot transfer to destroyed coros, skip and look for next */
		1259	if (ta->next->flags & CF_DESTROYED)
		1260	{
		1261	UNLOCK;
		1262	SvREFCNT_dec (next_sv);
		1263	/* coro_nready is already taken care of by destroy */
		1264	continue;
		1265	}
		1266
		1267	--coro_nready;
		1268	UNLOCK;
		1269	break;
		1270	}
		1271
		1272	/* free this only after the transfer */
		1273	prev_sv = SvRV (coro_current);
		1274	ta->prev = SvSTATE (prev_sv);
		1275	TRANSFER_CHECK (*ta);
		1276	assert (ta->next->flags & CF_READY);
		1277	ta->next->flags &= ~CF_READY;
		1278	SvRV_set (coro_current, next_sv);
910		1279
911	LOCK;	1280	LOCK;
912
913	current = GvSV (coro_current);
914
915	for (;;)
916	{
917	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);
920
921	if (next)
922	break;
923
924	UNLOCK;
925
926	{
927	dSP;
928
929	ENTER;
930	SAVETMPS;
931
932	PUSHMARK (SP);
933	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);
935
936	FREETMPS;
937	LEAVE;
938	}
939	}
940
941	prev = SvRV (current);
942	SvRV (current) = next;
943
944	/* free this only after the transfer */
945	free_coro_mortal ();	1281	free_coro_mortal (aTHX);
946	coro_mortal = prev;	1282	coro_mortal = prev_sv;
947
948	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951
952	UNLOCK;	1283	UNLOCK;
953	}	1284	}
954		1285
955	static void	1286	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1287	prepare_cede (pTHX_ struct transfer_args *ta)
957	{	1288	{
958	LOCK;	1289	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961
962	prepare_schedule (ta);	1290	prepare_schedule (aTHX_ ta);
		1291	}
		1292
		1293	static int
		1294	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1295	{
		1296	if (coro_nready)
		1297	{
		1298	SV *prev = SvRV (coro_current);
		1299	prepare_schedule (aTHX_ ta);
		1300	api_ready (prev);
		1301	return 1;
		1302	}
		1303	else
		1304	return 0;
963	}	1305	}
964		1306
965	static void	1307	static void
966	api_schedule (void)	1308	api_schedule (void)
967	{	1309	{
968	dTHX;	1310	dTHX;
969	struct transfer_args ta;	1311	struct transfer_args ta;
970		1312
971	prepare_schedule (&ta);	1313	prepare_schedule (aTHX_ &ta);
972	TRANSFER (ta);	1314	TRANSFER (ta);
973	}	1315	}
974		1316
975	static void	1317	static int
976	api_cede (void)	1318	api_cede (void)
977	{	1319	{
978	dTHX;	1320	dTHX;
979	struct transfer_args ta;	1321	struct transfer_args ta;
980		1322
981	prepare_cede (&ta);	1323	prepare_cede (aTHX_ &ta);
		1324
		1325	if (ta.prev != ta.next)
		1326	{
982	TRANSFER (ta);	1327	TRANSFER (ta);
		1328	return 1;
		1329	}
		1330	else
		1331	return 0;
983	}	1332	}
984		1333
		1334	static int
		1335	api_cede_notself (void)
		1336	{
		1337	dTHX;
		1338	struct transfer_args ta;
		1339
		1340	if (prepare_cede_notself (aTHX_ &ta))
		1341	{
		1342	TRANSFER (ta);
		1343	return 1;
		1344	}
		1345	else
		1346	return 0;
		1347	}
		1348
		1349	static void
		1350	api_trace (SV *coro_sv, int flags)
		1351	{
		1352	dTHX;
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354
		1355	if (flags & CC_TRACE)
		1356	{
		1357	if (!coro->cctx)
		1358	coro->cctx = cctx_new ();
		1359	else if (!(coro->cctx->flags & CC_TRACE))
		1360	croak ("cannot enable tracing on coroutine with custom stack");
		1361
		1362	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1363	}
		1364	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1365	{
		1366	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1367
		1368	if (coro->flags & CF_RUNNING)
		1369	PL_runops = RUNOPS_DEFAULT;
		1370	else
		1371	coro->runops = RUNOPS_DEFAULT;
		1372	}
		1373	}
		1374
985	MODULE = Coro::State PACKAGE = Coro::State	1375	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
986		1376
987	PROTOTYPES: DISABLE	1377	PROTOTYPES: DISABLE
988		1378
989	BOOT:	1379	BOOT:
990	{	1380	{
991	#ifdef USE_ITHREADS	1381	#ifdef USE_ITHREADS
992	MUTEX_INIT (&coro_mutex);	1382	MUTEX_INIT (&coro_mutex);
993	#endif	1383	#endif
994	BOOT_PAGESIZE;	1384	BOOT_PAGESIZE;
995		1385
		1386	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1387
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1388	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1389
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1393	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1001		1394
1002	main_mainstack = PL_mainstack;	1395	main_mainstack = PL_mainstack;
		1396	main_top_env = PL_top_env;
		1397
		1398	while (main_top_env->je_prev)
		1399	main_top_env = main_top_env->je_prev;
1003		1400
1004	coroapi.ver = CORO_API_VERSION;	1401	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1402	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1403
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1404	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1405	}
1012		1406
1013	SV *	1407	SV *
…		…
1017	struct coro *coro;	1411	struct coro *coro;
1018	HV *hv;	1412	HV *hv;
1019	int i;	1413	int i;
1020		1414
1021	Newz (0, coro, 1, struct coro);	1415	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1416	coro->args = newAV ();
		1417	coro->flags = CF_NEW;
1023		1418
		1419	if (coro_first) coro_first->prev = coro;
		1420	coro->next = coro_first;
		1421	coro_first = coro;
		1422
1024	hv = newHV ();	1423	coro->hv = hv = newHV ();
1025	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1424	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1425	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1426
1028	for (i = 1; i < items; i++)	1427	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1428	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/coro->mainstack = 0; //actual work is done inside transfer /
1033	/coro->stack = 0;/
1034	}	1429	}
1035	OUTPUT:	1430	OUTPUT:
1036	RETVAL	1431	RETVAL
1037		1432
		1433	# these not obviously related functions are all rolled into the same xs
		1434	# function to increase chances that they all will call transfer with the same
		1435	# stack offset
1038	void	1436	void
1039	transfer (...)	1437	_set_stacklevel (...)
1040	ALIAS:	1438	ALIAS:
1041	Coro::schedule = 1	1439	Coro::State::transfer = 1
1042	Coro::cede = 2	1440	Coro::schedule = 2
1043	_set_stacklevel = 3	1441	Coro::cede = 3
		1442	Coro::cede_notself = 4
1044	CODE:	1443	CODE:
1045	{	1444	{
1046	struct transfer_args ta;	1445	struct transfer_args ta;
1047		1446
1048	switch (ix)	1447	switch (ix)
1049	{	1448	{
1050	case 0:	1449	case 0:
1051	if (items != 3)	1450	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1451	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1452	break;
1056		1453
1057	case 1:	1454	case 1:
1058	prepare_schedule (&ta);	1455	if (items != 2)
		1456	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1457
		1458	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1059	break;	1459	break;
1060		1460
1061	case 2:	1461	case 2:
1062	prepare_cede (&ta);	1462	prepare_schedule (aTHX_ &ta);
1063	break;	1463	break;
1064		1464
1065	case 3:	1465	case 3:
1066	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1466	prepare_cede (aTHX_ &ta);
1067	ta.next = 0;	1467	break;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;	1468
		1469	case 4:
		1470	if (!prepare_cede_notself (aTHX_ &ta))
		1471	XSRETURN_EMPTY;
		1472
1069	break;	1473	break;
1070	}	1474	}
1071		1475
		1476	BARRIER;
1072	TRANSFER (ta);	1477	TRANSFER (ta);
1073	}
1074		1478
1075	void	1479	if (GIMME_V != G_VOID && ta.next != ta.prev)
1076	_clone_state_from (SV dst, SV src)	1480	XSRETURN_YES;
		1481	}
		1482
		1483	bool
		1484	_destroy (SV *coro_sv)
1077	CODE:	1485	CODE:
1078	{	1486	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1079	struct coro *coro_src = SvSTATE (src);	1487	OUTPUT:
1080		1488	RETVAL
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1085	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1489
1093	void	1490	void
1094	_exit (code)	1491	_exit (code)
1095	int code	1492	int code
1096	PROTOTYPE: $	1493	PROTOTYPE: $
1097	CODE:	1494	CODE:
1098	_exit (code);	1495	_exit (code);
1099		1496
1100	MODULE = Coro::State PACKAGE = Coro::Cont	1497	int
		1498	cctx_stacksize (int new_stacksize = 0)
		1499	CODE:
		1500	RETVAL = coro_stacksize;
		1501	if (new_stacksize)
		1502	coro_stacksize = new_stacksize;
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	int
		1507	cctx_count ()
		1508	CODE:
		1509	RETVAL = cctx_count;
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
		1514	cctx_idle ()
		1515	CODE:
		1516	RETVAL = cctx_idle;
		1517	OUTPUT:
		1518	RETVAL
1101		1519
1102	void	1520	void
1103	yield (...)	1521	list ()
1104	PROTOTYPE: @	1522	PPCODE:
		1523	{
		1524	struct coro *coro;
		1525	for (coro = coro_first; coro; coro = coro->next)
		1526	if (coro->hv)
		1527	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1528	}
		1529
		1530	void
		1531	call (Coro::State coro, SV *coderef)
		1532	ALIAS:
		1533	eval = 1
		1534	CODE:
		1535	{
		1536	if (coro->mainstack)
		1537	{
		1538	struct coro temp;
		1539	Zero (&temp, 1, struct coro);
		1540
		1541	if (!(coro->flags & CF_RUNNING))
		1542	{
		1543	save_perl (aTHX_ &temp);
		1544	load_perl (aTHX_ coro);
		1545	}
		1546
		1547	{
		1548	dSP;
		1549	ENTER;
		1550	SAVETMPS;
		1551	PUSHMARK (SP);
		1552	PUTBACK;
		1553	if (ix)
		1554	eval_sv (coderef, 0);
		1555	else
		1556	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1557	SPAGAIN;
		1558	FREETMPS;
		1559	LEAVE;
		1560	PUTBACK;
		1561	}
		1562
		1563	if (!(coro->flags & CF_RUNNING))
		1564	{
		1565	save_perl (aTHX_ coro);
		1566	load_perl (aTHX_ &temp);
		1567	}
		1568	}
		1569	}
		1570
		1571	SV *
		1572	is_ready (Coro::State coro)
		1573	PROTOTYPE: $
		1574	ALIAS:
		1575	is_ready = CF_READY
		1576	is_running = CF_RUNNING
		1577	is_new = CF_NEW
		1578	is_destroyed = CF_DESTROYED
		1579	CODE:
		1580	RETVAL = boolSV (coro->flags & ix);
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	void
		1585	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1586
		1587	SV *
		1588	has_stack (Coro::State coro)
		1589	PROTOTYPE: $
		1590	CODE:
		1591	RETVAL = boolSV (!!coro->cctx);
		1592	OUTPUT:
		1593	RETVAL
		1594
		1595	int
		1596	is_traced (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	IV
		1604	rss (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	usecount = 1
1105	CODE:	1608	CODE:
1106	{	1609	switch (ix)
1107	SV *yieldstack;	1610	{
1108	SV *sv;	1611	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1109	AV *defav = GvAV (PL_defgv);	1612	case 1: RETVAL = coro->usecount; break;
1110	struct coro prev, next;
1111
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0	1613	}
1116	);	1614	OUTPUT:
		1615	RETVAL
1117		1616
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1126	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1617
1132	MODULE = Coro::State PACKAGE = Coro	1618	MODULE = Coro::State PACKAGE = Coro
1133		1619
1134	BOOT:	1620	BOOT:
1135	{	1621	{
1136	int i;	1622	int i;
		1623
		1624	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1625	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1626	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1627
		1628	coro_current = get_sv ("Coro::current", FALSE);
		1629	SvREADONLY_on (coro_current);
1137		1630
1138	coro_stash = gv_stashpv ("Coro", TRUE);	1631	coro_stash = gv_stashpv ("Coro", TRUE);
1139		1632
1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1633	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1634	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1635	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1636	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1637	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1638	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1639
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1149
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1640	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1641	coro_ready[i] = newAV ();
1152		1642
1153	{	1643	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1644	SV *sv = perl_get_sv("Coro::API", 1);
1155		1645
1156	coroapi.schedule = api_schedule;	1646	coroapi.schedule = api_schedule;
1157	coroapi.cede = api_cede;	1647	coroapi.cede = api_cede;
		1648	coroapi.cede_notself = api_cede_notself;
1158	coroapi.ready = api_ready;	1649	coroapi.ready = api_ready;
		1650	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1651	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1652	coroapi.current = coro_current;
1161		1653
1162	GCoroAPI = &coroapi;	1654	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1655	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1656	SvREADONLY_on (sv);
1165	}	1657	}
1166	}	1658	}
		1659
		1660	void
		1661	_set_current (SV *current)
		1662	PROTOTYPE: $
		1663	CODE:
		1664	SvREFCNT_dec (SvRV (coro_current));
		1665	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1167		1666
1168	int	1667	int
1169	prio (Coro::State coro, int newprio = 0)	1668	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1669	ALIAS:
1171	nice = 1	1670	nice = 1
…		…
1174	RETVAL = coro->prio;	1673	RETVAL = coro->prio;
1175		1674
1176	if (items > 1)	1675	if (items > 1)
1177	{	1676	{
1178	if (ix)	1677	if (ix)
1179	newprio += coro->prio;	1678	newprio = coro->prio - newprio;
1180		1679
1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1680	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1681	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183		1682
1184	coro->prio = newprio;	1683	coro->prio = newprio;
1185	}	1684	}
1186	}	1685	}
		1686	OUTPUT:
		1687	RETVAL
1187		1688
1188	void	1689	SV *
1189	ready (SV *self)	1690	ready (SV *self)
1190	PROTOTYPE: $	1691	PROTOTYPE: $
1191	CODE:	1692	CODE:
1192	api_ready (self);	1693	RETVAL = boolSV (api_ready (self));
		1694	OUTPUT:
		1695	RETVAL
1193		1696
1194	int	1697	int
1195	nready (...)	1698	nready (...)
1196	PROTOTYPE:	1699	PROTOTYPE:
1197	CODE:	1700	CODE:
1198	RETVAL = coro_nready;	1701	RETVAL = coro_nready;
1199	OUTPUT:	1702	OUTPUT:
1200	RETVAL	1703	RETVAL
1201		1704
		1705	# for async_pool speedup
		1706	void
		1707	_pool_1 (SV *cb)
		1708	CODE:
		1709	{
		1710	int i, len;
		1711	HV hv = (HV )SvRV (coro_current);
		1712	AV *defav = GvAV (PL_defgv);
		1713	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1714	AV *invoke_av;
		1715
		1716	if (!invoke)
		1717	croak ("\3terminate\2\n");
		1718
		1719	hv_store (hv, "desc", sizeof ("desc") - 1,
		1720	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1721
		1722	invoke_av = (AV *)SvRV (invoke);
		1723	len = av_len (invoke_av);
		1724
		1725	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1726
		1727	if (len > 0)
		1728	{
		1729	av_fill (defav, len - 1);
		1730	for (i = 0; i < len; ++i)
		1731	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1732	}
		1733
		1734	SvREFCNT_dec (invoke);
		1735	}
		1736
		1737	void
		1738	_pool_2 (SV *cb)
		1739	CODE:
		1740	{
		1741	struct coro *coro = SvSTATE (coro_current);
		1742
		1743	sv_setsv (cb, &PL_sv_undef);
		1744
		1745	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1746	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1747	croak ("\3terminate\2\n");
		1748
		1749	av_clear (GvAV (PL_defgv));
		1750	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1751	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1752
		1753	coro->prio = 0;
		1754
		1755	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1756	api_trace (coro_current, 0);
		1757
		1758	av_push (av_async_pool, newSVsv (coro_current));
		1759	}
		1760
		1761
1202	MODULE = Coro::State PACKAGE = Coro::AIO	1762	MODULE = Coro::State PACKAGE = Coro::AIO
1203		1763
1204	SV *	1764	SV *
1205	_get_state ()	1765	_get_state ()
1206	CODE:	1766	CODE:
1207	{	1767	{
1208	struct {	1768	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		1769
		1770	RETVAL = newSV (sizeof (struct io_state));
		1771	data = (struct io_state *)SvPVX (RETVAL);
		1772	SvCUR_set (RETVAL, sizeof (struct io_state));
		1773	SvPOK_only (RETVAL);
		1774
1215	data.errorno = errno;	1775	data->errorno = errno;
1216	data.laststype = PL_laststype;	1776	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1777	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1778	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1779	}
1222	OUTPUT:	1780	OUTPUT:
1223	RETVAL	1781	RETVAL
1224		1782
1225	void	1783	void
1226	_set_state (char *data_)	1784	_set_state (char *data_)
1227	PROTOTYPE: $	1785	PROTOTYPE: $
1228	CODE:	1786	CODE:
1229	{	1787	{
1230	struct {	1788	struct io_state data = (void )data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} data = (void )data_;
1236		1789
1237	errno = data->errorno;	1790	errno = data->errorno;
1238	PL_laststype = data->laststype;	1791	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1792	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1793	PL_statcache = data->statcache;
1241	}	1794	}
		1795

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Comparing Coro/Coro/State.xs (file contents): Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs. Revision 1.179 by root, Wed Oct 3 16:03:17 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.179 by root, Wed Oct 3 16:03:17 2007 UTC