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Comparing Coro/Coro/State.xs (file contents):
Revision 1.91 by root, Sat Nov 25 01:14:11 2006 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 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 <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
33		87
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	89	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	90	#endif
52	# include <limits.h>	91
53	# ifndef PAGESIZE	92	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	93	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	94	#endif
60	#endif
61		95
62	#define SUB_INIT "Coro::State::initialize"	96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
63		100
64	/* The next macro should declare a variable stacklevel that contains and approximation	101	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	102	* portable way as possible. */
66	* and should be unique. */	103	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	104	#define STACKLEVEL ((void *)&stacklevel)
68		105
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		107
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
		112	#else
		113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
		116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
		120
		121	#define NOINLINE attribute ((noinline))
72		122
73	#include "CoroAPI.h"	123	#include "CoroAPI.h"
74		124
75	#ifdef USE_ITHREADS	125	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	126	static perl_mutex coro_mutex;
…		…
79	#else	129	#else
80	# define LOCK (void)0	130	# define LOCK (void)0
81	# define UNLOCK (void)0	131	# define UNLOCK (void)0
82	#endif	132	#endif
83		133
		134	/* helper storage struct for Coro::AIO */
		135	struct io_state
		136	{
		137	int errorno;
		138	I32 laststype;
		139	int laststatval;
		140	Stat_t statcache;
		141	};
		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	145	static AV *main_mainstack; /* used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	147	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	148	static SV *coro_mortal; /* will be freed after next transfer */
88		149
89	/* this is actually not just the c stack but also c registers etc... */	150	static GV *irsgv; /* $/ */
		151	static GV *stdoutgv; /* *STDOUT */
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
		158	static struct coro_cctx *cctx_first;
		159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		168	};
		169
		170	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	171	typedef struct coro_cctx {
91	struct coro_stack *next;	172	struct coro_cctx *next;
92		173
93	void *idle_sp;	174	/* the stack */
94	void *sptr;	175	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
96		177
97	/* cpu state */	178	/* cpu state */
		179	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		180	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		181	JMPENV *top_env;
98	coro_context cctx;	182	coro_context cctx;
99	} coro_stack;
100		183
101	static coro_stack *main_stack;	184	#if CORO_USE_VALGRIND
		185	int valgrind_id;
		186	#endif
		187	unsigned char flags;
		188	} coro_cctx;
102		189
		190	enum {
		191	CF_RUNNING = 0x0001, /* coroutine is running */
		192	CF_READY = 0x0002, /* coroutine is ready */
		193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		195	};
		196
		197	/* this is a structure representing a perl-level coroutine */
103	struct coro {	198	struct coro {
104	/* optionally saved, might be zero */	199	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	200	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		201
150	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
151	AV *args;	203	AV *args;
152	int refcnt;	204	int refcnt;
		205	int flags; /* CF_ flags */
		206
		207	/* optionally saved, might be zero */
		208	AV *defav; /* @_ */
		209	SV *defsv; /* $_ */
		210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
		212	SV *irssv; /* $/ */
		213	SV *irssv_sv; /* real $/ cache */
		214
		215	#define VAR(name,type) type name;
		216	# include "state.h"
		217	#undef VAR
		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
		222	/* coro process data */
		223	int prio;
		224	//SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro *next, *prev;
		231	HV *hv; /* the perl hash associated with this coro, if any */
153	};	232	};
154		233
155	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
157		236
		237	/** Coro ********************************************************************/
		238
		239	#define PRIO_MAX 3
		240	#define PRIO_HIGH 1
		241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/** lowlevel stuff **********************************************************/
		253
158	static AV *	254	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
160	{	256	{
161	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	258	AV *newpadlist, *newpad;
163		259
164	newpadlist = newAV ();	260	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	261	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	262	#if PERL_VERSION_ATLEAST (5,9,0)
		263	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		264	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	265	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	266	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	267	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	268	--AvFILLp (padlist);
173		269
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	270	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		314
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	315	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		316
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	317	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		318
		319	#define CORO_MAGIC(cv) \
		320	SvMAGIC (cv) \
		321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		322	? SvMAGIC (cv) \
		323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		324	: 0
		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		351
223	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
224	static void	353	static void
225	get_padlist (pTHX_ CV *cv)	354	get_padlist (pTHX_ CV *cv)
226	{	355	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	356	MAGIC *mg = CORO_MAGIC (cv);
		357	AV *av;
228		358
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	361	else
232	{	362	{
233	#if 0	363	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	364	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	365	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
239	#else	369	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	373	}
244		374
245	static void	375	static void
246	put_padlist (pTHX_ CV *cv)	376	put_padlist (pTHX_ CV *cv)
247	{	377	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	378	MAGIC *mg = CORO_MAGIC (cv);
		379	AV *av;
249		380
250	if (!mg)	381	if (expect_false (!mg))
251	{	382	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
256	}	387	}
257		388
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	389	av = (AV *)mg->mg_obj;
259	}
260		390
261	#define SB do {	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	392	av_extend (av, AvMAX (av) + 1);
263		393
264	#define LOAD(state) load_state(aTHX_ (state));	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	395	}
266		396
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	397	/** load & save, init *******************************************************/
268		398
269	static void	399	static void
270	load_state(pTHX_ Coro__State c)	400	load_perl (pTHX_ Coro__State c)
271	{	401	{
272	PL_dowarn = c->dowarn;	402	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	403	# include "state.h"
		404	#undef VAR
274		405
275	PL_curstackinfo = c->curstackinfo;	406	GvSV (PL_defgv) = c->defsv;
276	PL_curstack = c->curstack;	407	GvAV (PL_defgv) = c->defav;
277	PL_mainstack = c->mainstack;	408	GvSV (PL_errgv) = c->errsv;
278	PL_stack_sp = c->stack_sp;	409	GvSV (irsgv) = c->irssv_sv;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
310		410
311	{	411	{
312	dSP;	412	dSP;
313	CV *cv;	413	CV *cv;
314		414
315	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
317	{	417	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	419	CvDEPTH (cv) = PTR2IV (POPs);
324	}	420	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	421	}
328		422
329	PUTBACK;	423	PUTBACK;
330	}	424	}
331	}	425	}
332		426
333	static void	427	static void
334	save_state(pTHX_ Coro__State c, int flags)	428	save_perl (pTHX_ Coro__State c)
335	{	429	{
336	{	430	{
337	dSP;	431	dSP;
338	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	436	/*
343	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
345	*/	439	*/
346		440
347	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
349	for (;;)	443	for (;;)
350	{	444	{
351	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
352	{	446	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
354		448
355	if (CxTYPE(cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356	{	450	{
357	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
		452
358	if (CvDEPTH(cv))	453	if (expect_true (CvDEPTH (cv)))
359	{	454	{
360	EXTEND (SP, CvDEPTH(cv)*2);	455	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	456	PUSHs ((SV *)CvPADLIST (cv));
		457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
371		459
		460	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	461	get_padlist (aTHX_ cv);
373	}	462	}
374	}	463	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	464	}
384		465
385	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
386	break;	467	break;
387		468
388	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
391	}	472	}
392		473
393	PUTBACK;	474	PUTBACK;
394	}	475	}
395		476
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
		480	c->irssv_sv = GvSV (irsgv);
399		481
400	c->dowarn = PL_dowarn;	482	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	483	# include "state.h"
402		484	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	485	}
435		486
436	/*	487	/*
437	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
441	*/	492	*/
		493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
442	static void	496	static void
443	coro_init_stacks (pTHX)	497	coro_init_stacks (pTHX)
444	{	498	{
445	LOCK;	499	PL_curstackinfo = new_stackinfo(64, 6);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		503
452	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		507
456	New(50,PL_tmps_stack,96,SV*);	508	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	511	PL_tmps_max = 64;
460		512
461	New(54,PL_markstack,16,I32);	513	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	515	PL_markstack_max = PL_markstack + 16;
464		516
…		…
468		520
469	New(54,PL_scopestack,16,I32);	521	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	523	PL_scopestack_max = 16;
472		524
473	New(54,PL_savestack,96,ANY);	525	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	527	PL_savestack_max = 64;
476		528
477	#if PERL_VERSION < 9	529	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	530	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	532	PL_retstack_max = 4;
481	#endif	533	#endif
482
483	UNLOCK;
484	}	534	}
		535	#endif
485		536
486	/*	537	/*
487	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
488	*/	539	*/
489	static void	540	static void
490	destroy_stacks(pTHX)	541	coro_destroy_stacks (pTHX)
491	{	542	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501	}
502
503	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
505		545
506	while (PL_curstackinfo)	546	while (PL_curstackinfo)
507	{	547	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
509		549
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	550	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		552
522	Safefree (PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	554	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	555	PL_curstackinfo = p;
525	}	556	}
526		557
527	Safefree (PL_tmps_stack);	558	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	559	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	560	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	561	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	562	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	563	Safefree (PL_retstack);
533	#endif	564	#endif
534	}	565	}
535		566
536	static void	567	static size_t
537	setup_coro (struct coro *coro)	568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
		575	{
		576	#define VAR(name,type)coro->name = PL_ ## name;
		577	# include "state.h"
		578	#undef VAR
		579	}
		580
		581	rss += sizeof (coro->curstackinfo);
		582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
		589
		590	#if !PERL_VERSION_ATLEAST (5,9,0)
		591	rss += coro->retstack_max * sizeof (OP *);
		592	#endif
		593	}
		594
		595	return rss;
		596	}
		597
		598	/** coroutine stack handling ************************************************/
		599
		600	static void
		601	coro_setup (pTHX_ struct coro *coro)
538	{	602	{
539	/*	603	/*
540	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
541	*/	605	*/
542	dTHX;	606	coro_init_stacks (aTHX);
		607
		608	PL_runops = RUNOPS_DEFAULT;
		609	PL_curcop = &PL_compiling;
		610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
		612	PL_curpm = 0;
		613	PL_localizing = 0;
		614	PL_dirty = 0;
		615	PL_restartop = 0;
		616
		617	GvSV (PL_defgv) = newSV (0);
		618	GvAV (PL_defgv) = coro->args; coro->args = 0;
		619	GvSV (PL_errgv) = newSV (0);
		620	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		621	PL_rs = newSVsv (GvSV (irsgv));
		622	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		623
		624	ENTER; /* necessary e.g. for dounwind */
		625
		626	{
		627	dSP;
		628	LOGOP myop;
		629
		630	Zero (&myop, 1, LOGOP);
		631	myop.op_next = Nullop;
		632	myop.op_flags = OPf_WANT_VOID;
		633
		634	PUSHMARK (SP);
		635	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		636	PUTBACK;
		637	PL_op = (OP *)&myop;
		638	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		639	SPAGAIN;
		640	}
		641	}
		642
		643	static void
		644	coro_destroy (pTHX_ struct coro *coro)
		645	{
		646	if (!IN_DESTRUCT)
		647	{
		648	/* restore all saved variables and stuff */
		649	LEAVE_SCOPE (0);
		650	assert (PL_tmps_floor == -1);
		651
		652	/* free all temporaries */
		653	FREETMPS;
		654	assert (PL_tmps_ix == -1);
		655
		656	/* unwind all extra stacks */
		657	POPSTACK_TO (PL_mainstack);
		658
		659	/* unwind main stack */
		660	dounwind (-1);
		661	}
		662
		663	SvREFCNT_dec (GvSV (PL_defgv));
		664	SvREFCNT_dec (GvAV (PL_defgv));
		665	SvREFCNT_dec (GvSV (PL_errgv));
		666	SvREFCNT_dec (PL_defoutgv);
		667	SvREFCNT_dec (PL_rs);
		668	SvREFCNT_dec (GvSV (irsgv));
		669
		670	SvREFCNT_dec (coro->saved_deffh);
		671	//SvREFCNT_dec (coro->throw);
		672
		673	coro_destroy_stacks (aTHX);
		674	}
		675
		676	static void
		677	free_coro_mortal (pTHX)
		678	{
		679	if (expect_true (coro_mortal))
		680	{
		681	SvREFCNT_dec (coro_mortal);
		682	coro_mortal = 0;
		683	}
		684	}
		685
		686	static int
		687	runops_trace (pTHX)
		688	{
		689	COP *oldcop = 0;
		690	int oldcxix = -2;
		691	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		692	coro_cctx *cctx = coro->cctx;
		693
		694	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		695	{
		696	PERL_ASYNC_CHECK ();
		697
		698	if (cctx->flags & CC_TRACE_ALL)
		699	{
		700	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		701	{
		702	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		703	SV **bot, **top;
		704	AV *av = newAV (); /* return values */
		705	SV **cb;
		706	dSP;
		707
		708	GV *gv = CvGV (cx->blk_sub.cv);
		709	SV *fullname = sv_2mortal (newSV (0));
		710	if (isGV (gv))
		711	gv_efullname3 (fullname, gv, 0);
		712
		713	bot = PL_stack_base + cx->blk_oldsp + 1;
		714	top = cx->blk_gimme == G_ARRAY ? SP + 1
		715	: cx->blk_gimme == G_SCALAR ? bot + 1
		716	: bot;
		717
		718	av_extend (av, top - bot);
		719	while (bot < top)
		720	av_push (av, SvREFCNT_inc (*bot++));
		721
		722	PL_runops = RUNOPS_DEFAULT;
		723	ENTER;
		724	SAVETMPS;
		725	EXTEND (SP, 3);
		726	PUSHMARK (SP);
		727	PUSHs (&PL_sv_no);
		728	PUSHs (fullname);
		729	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		730	PUTBACK;
		731	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		732	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		733	SPAGAIN;
		734	FREETMPS;
		735	LEAVE;
		736	PL_runops = runops_trace;
		737	}
		738
		739	if (oldcop != PL_curcop)
		740	{
		741	oldcop = PL_curcop;
		742
		743	if (PL_curcop != &PL_compiling)
		744	{
		745	SV **cb;
		746
		747	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		748	{
		749	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		750
		751	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		752	{
		753	runops_proc_t old_runops = PL_runops;
		754	dSP;
		755	GV *gv = CvGV (cx->blk_sub.cv);
		756	SV *fullname = sv_2mortal (newSV (0));
		757
		758	if (isGV (gv))
		759	gv_efullname3 (fullname, gv, 0);
		760
		761	PL_runops = RUNOPS_DEFAULT;
		762	ENTER;
		763	SAVETMPS;
		764	EXTEND (SP, 3);
		765	PUSHMARK (SP);
		766	PUSHs (&PL_sv_yes);
		767	PUSHs (fullname);
		768	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		769	PUTBACK;
		770	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		771	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		772	SPAGAIN;
		773	FREETMPS;
		774	LEAVE;
		775	PL_runops = runops_trace;
		776	}
		777
		778	oldcxix = cxstack_ix;
		779	}
		780
		781	if (cctx->flags & CC_TRACE_LINE)
		782	{
		783	dSP;
		784
		785	PL_runops = RUNOPS_DEFAULT;
		786	ENTER;
		787	SAVETMPS;
		788	EXTEND (SP, 3);
		789	PL_runops = RUNOPS_DEFAULT;
		790	PUSHMARK (SP);
		791	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		792	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		793	PUTBACK;
		794	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		795	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		796	SPAGAIN;
		797	FREETMPS;
		798	LEAVE;
		799	PL_runops = runops_trace;
		800	}
		801	}
		802	}
		803	}
		804	}
		805
		806	TAINT_NOT;
		807	return 0;
		808	}
		809
		810	/* inject a fake call to Coro::State::_cctx_init into the execution */
		811	/* _cctx_init should be careful, as it could be called at almost any time */
		812	/* during execution of a perl program */
		813	static void NOINLINE
		814	prepare_cctx (pTHX_ coro_cctx *cctx)
		815	{
543	dSP;	816	dSP;
544	UNOP myop;	817	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		818
547	coro_init_stacks (aTHX);	819	PL_top_env = &PL_start_env;
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		820
553	SPAGAIN;	821	if (cctx->flags & CC_TRACE)
		822	PL_runops = runops_trace;
554		823
555	Zero (&myop, 1, UNOP);	824	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	825	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	826	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		827
		828	PUSHMARK (SP);
		829	EXTEND (SP, 2);
		830	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		831	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		832	PUTBACK;
559	PL_op = (OP *)&myop;	833	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	834	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	835	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	836	}
569		837
		838	/*
		839	* this is a _very_ stripped down perl interpreter ;)
		840	*/
570	static void	841	static void
571	transfer_tail ()	842	coro_run (void *arg)
572	{	843	{
573	if (coro_mortal)	844	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		845
		846	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	847	UNLOCK;
580	}
581		848
582	static void	849	/* we now skip the entersub that lead to transfer() */
583	coro_run (void *arg)	850	PL_op = PL_op->op_next;
584	{	851
		852	/* inject a fake subroutine call to cctx_init */
		853	prepare_cctx (aTHX_ (coro_cctx *)arg);
		854
		855	/* somebody or something will hit me for both perl_run and PL_restartop */
		856	PL_restartop = PL_op;
		857	perl_run (PL_curinterp);
		858
585	/*	859	/*
586	* this is a _very_ stripped down perl interpreter ;)	860	* If perl-run returns we assume exit() was being called or the coro
		861	* fell off the end, which seems to be the only valid (non-bug)
		862	* reason for perl_run to return. We try to exit by jumping to the
		863	* bootstrap-time "top" top_env, as we cannot restore the "main"
		864	* coroutine as Coro has no such concept
587	*/	865	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	866	PL_top_env = main_top_env;
593	PL_restartop = PL_op;	867	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	868	}
599		869
600	static coro_stack *	870	static coro_cctx *
601	stack_new ()	871	cctx_new ()
602	{	872	{
603	coro_stack *stack;	873	coro_cctx *cctx;
		874	void *stack_start;
		875	size_t stack_size;
604		876
		877	++cctx_count;
		878
605	New (0, stack, 1, coro_stack);	879	Newz (0, cctx, 1, coro_cctx);
606		880
607	#if HAVE_MMAP	881	#if HAVE_MMAP
608		882
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	883	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		884	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	885	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		886
612	if (stack->sptr == (void *)-1)	887	if (cctx->sptr != (void *)-1)
		888	{
		889	# if CORO_STACKGUARD
		890	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		891	# endif
		892	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		893	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		894	cctx->flags |= CC_MAPPED;
613	{	895	}
		896	else
		897	#endif
		898	{
		899	cctx->ssize = coro_stacksize * (long)sizeof (long);
		900	New (0, cctx->sptr, coro_stacksize, long);
		901
		902	if (!cctx->sptr)
		903	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	904	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	905	_exit (EXIT_FAILURE);
616	}	906	}
617		907
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	908	stack_start = cctx->sptr;
619		909	stack_size = cctx->ssize;
620	#else
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	910	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		911
631	#endif	912	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	913	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
634		914
635	return stack;	915	return cctx;
636	}	916	}
637		917
638	static void	918	static void
639	stack_free (coro_stack *stack)	919	cctx_destroy (coro_cctx *cctx)
640	{	920	{
641	if (!stack || stack == main_stack)	921	if (!cctx)
642	return;	922	return;
643		923
		924	--cctx_count;
		925
		926	#if CORO_USE_VALGRIND
		927	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		928	#endif
		929
644	#if HAVE_MMAP	930	#if HAVE_MMAP
		931	if (cctx->flags & CC_MAPPED)
645	munmap (stack->sptr, stack->ssize);	932	munmap (cctx->sptr, cctx->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static coro_stack *
656	stack_get ()
657	{
658	coro_stack *stack;
659
660	if (stack_first)
661	{
662	stack = stack_first;
663	stack_first = stack->next;
664	}
665	else	933	else
		934	#endif
		935	Safefree (cctx->sptr);
		936
		937	Safefree (cctx);
		938	}
		939
		940	/* wether this cctx should be destructed */
		941	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		942
		943	static coro_cctx *
		944	cctx_get (pTHX)
		945	{
		946	while (expect_true (cctx_first))
666	{	947	{
667	stack = stack_new ();	948	coro_cctx *cctx = cctx_first;
668	PL_op = PL_op->op_next;	949	cctx_first = cctx->next;
		950	--cctx_idle;
		951
		952	if (expect_true (!CCTX_EXPIRED (cctx)))
		953	return cctx;
		954
		955	cctx_destroy (cctx);
669	}	956	}
670		957
671	return stack;	958	return cctx_new ();
672	}	959	}
673		960
674	static void	961	static void
675	stack_put (coro_stack *stack)	962	cctx_put (coro_cctx *cctx)
676	{	963	{
677	stack->next = stack_first;	964	/* free another cctx if overlimit */
678	stack_first = stack;	965	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
679	}	966	{
		967	coro_cctx *first = cctx_first;
		968	cctx_first = first->next;
		969	--cctx_idle;
680		970
681	/* never call directly, always through the coro_state_transfer global variable */	971	cctx_destroy (first);
		972	}
		973
		974	++cctx_idle;
		975	cctx->next = cctx_first;
		976	cctx_first = cctx;
		977	}
		978
		979	/** coroutine switching *****************************************************/
		980
682	static void	981	static void
		982	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		983	{
		984	if (expect_true (prev != next))
		985	{
		986	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		987	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		988
		989	if (expect_false (next->flags & CF_RUNNING))
		990	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		991
		992	if (expect_false (next->flags & CF_DESTROYED))
		993	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		994
		995	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		996	croak ("Coro::State::transfer called while parsing, but this is not supported");
		997	}
		998	}
		999
		1000	/* always use the TRANSFER macro */
		1001	static void NOINLINE
683	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1002	transfer (pTHX_ struct coro *prev, struct coro *next)
684	{	1003	{
685	dSTACKLEVEL;	1004	dSTACKLEVEL;
686		1005
687	/* sometimes transfer is only called to set idle_sp */	1006	/* sometimes transfer is only called to set idle_sp */
688	if (!prev->stack->idle_sp)	1007	if (expect_false (!next))
689	prev->stack->idle_sp = stacklevel;	1008	{
690		1009	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
691	LOCK;	1010	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
692
693	if (prev != next)
694	{	1011	}
695	coro_stack *prev_stack = prev->stack;	1012	else if (expect_true (prev != next))
		1013	{
		1014	coro_cctx *prev__cctx;
696		1015
697	/* possibly "free" the stack */	1016	if (expect_false (prev->flags & CF_NEW))
698	if (0 && prev_stack->idle_sp == stacklevel)
699	{	1017	{
700	stack_put (prev_stack);	1018	/* create a new empty context */
701	prev->stack = 0;	1019	Newz (0, prev->cctx, 1, coro_cctx);
		1020	prev->flags &= ~CF_NEW;
		1021	prev->flags |= CF_RUNNING;
702	}	1022	}
703		1023
704	if (next->mainstack)	1024	prev->flags &= ~CF_RUNNING;
		1025	next->flags |= CF_RUNNING;
		1026
		1027	LOCK;
		1028
		1029	if (expect_false (next->flags & CF_NEW))
705	{	1030	{
706	/* coroutine already started */	1031	/* need to start coroutine */
707	SAVE (prev, flags);	1032	next->flags &= ~CF_NEW;
708	LOAD (next);	1033	/* first get rid of the old state */
		1034	save_perl (aTHX_ prev);
		1035	/* setup coroutine call */
		1036	coro_setup (aTHX_ next);
709	}	1037	}
710	else	1038	else
711	{	1039	{
712	/* need to start coroutine */	1040	/* coroutine already started */
713	/* first get rid of the old state */	1041	save_perl (aTHX_ prev);
714	SAVE (prev, -1);	1042	load_perl (aTHX_ next);
715	/* setup coroutine call */
716	setup_coro (next);
717	/* need to change stack from main_stack to real one */
718	next->stack = 0;
719	}	1043	}
720		1044
721	if (!next->stack)	1045	prev__cctx = prev->cctx;
722	next->stack = stack_get ();
723		1046
724	if (prev_stack != next->stack)	1047	/* possibly "free" the cctx */
		1048	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1049	{
		1050	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1051	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1052
		1053	prev->cctx = 0;
		1054
		1055	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1056	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1057	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1058	next->cctx = cctx_get (aTHX);
		1059
		1060	cctx_put (prev__cctx);
		1061	}
		1062
		1063	++next->usecount;
		1064
		1065	if (expect_true (!next->cctx))
		1066	next->cctx = cctx_get (aTHX);
		1067
		1068	if (expect_false (prev__cctx != next->cctx))
		1069	{
		1070	prev__cctx->top_env = PL_top_env;
		1071	PL_top_env = next->cctx->top_env;
725	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1072	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
726	}	1073	}
727		1074
728	transfer_tail ();	1075	free_coro_mortal (aTHX);
		1076	UNLOCK;
		1077	}
729	}	1078	}
730		1079
731	/* use this function pointer to call the above function */	1080	struct transfer_args
732	/* this is done to increase chances of the compiler not inlining the call */	1081	{
733	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1082	struct coro *prev, *next;
		1083	};
734		1084
		1085	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1086	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1087
		1088	/** high level stuff ********************************************************/
		1089
735	static void	1090	static int
736	coro_state_destroy (struct coro *coro)	1091	coro_state_destroy (pTHX_ struct coro *coro)
737	{	1092	{
738	if (coro->refcnt--)	1093	if (coro->flags & CF_DESTROYED)
739	return;	1094	return 0;
		1095
		1096	coro->flags |= CF_DESTROYED;
		1097
		1098	if (coro->flags & CF_READY)
		1099	{
		1100	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1101	/* alternative: look through all ready queues and remove the coro */
		1102	LOCK;
		1103	--coro_nready;
		1104	UNLOCK;
		1105	}
		1106	else
		1107	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
740		1108
741	if (coro->mainstack && coro->mainstack != main_mainstack)	1109	if (coro->mainstack && coro->mainstack != main_mainstack)
742	{	1110	{
743	struct coro temp;	1111	struct coro temp;
744		1112
745	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1113	if (coro->flags & CF_RUNNING)
		1114	croak ("FATAL: tried to destroy currently running coroutine");
		1115
		1116	save_perl (aTHX_ &temp);
746	LOAD (aTHX_ coro);	1117	load_perl (aTHX_ coro);
747		1118
748	destroy_stacks (aTHX);	1119	coro_destroy (aTHX_ coro);
749		1120
750	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1121	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
751		1122
752	coro->mainstack = 0;	1123	coro->mainstack = 0;
753	}	1124	}
754		1125
755	stack_free (coro->stack);	1126	cctx_destroy (coro->cctx);
756	SvREFCNT_dec (coro->args);	1127	SvREFCNT_dec (coro->args);
757	Safefree (coro);	1128
		1129	if (coro->next) coro->next->prev = coro->prev;
		1130	if (coro->prev) coro->prev->next = coro->next;
		1131	if (coro == coro_first) coro_first = coro->next;
		1132
		1133	return 1;
758	}	1134	}
759		1135
760	static int	1136	static int
761	coro_state_clear (SV *sv, MAGIC *mg)	1137	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
762	{	1138	{
763	struct coro *coro = (struct coro *)mg->mg_ptr;	1139	struct coro *coro = (struct coro *)mg->mg_ptr;
764	mg->mg_ptr = 0;	1140	mg->mg_ptr = 0;
765		1141
		1142	coro->hv = 0;
		1143
		1144	if (--coro->refcnt < 0)
		1145	{
766	coro_state_destroy (coro);	1146	coro_state_destroy (aTHX_ coro);
		1147	Safefree (coro);
		1148	}
767		1149
768	return 0;	1150	return 0;
769	}	1151	}
770		1152
771	static int	1153	static int
772	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1154	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
773	{	1155	{
774	struct coro *coro = (struct coro *)mg->mg_ptr;	1156	struct coro *coro = (struct coro *)mg->mg_ptr;
775		1157
776	++coro->refcnt;	1158	++coro->refcnt;
777		1159
778	return 0;	1160	return 0;
779	}	1161	}
780		1162
781	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1163	static MGVTBL coro_state_vtbl = {
		1164	0, 0, 0, 0,
		1165	coro_state_free,
		1166	0,
		1167	#ifdef MGf_DUP
		1168	coro_state_dup,
		1169	#else
		1170	# define MGf_DUP 0
		1171	#endif
		1172	};
782		1173
783	static struct coro *
784	SvSTATE (SV *coro)
785	{
786	HV *stash;
787	MAGIC *mg;
788
789	if (SvROK (coro))
790	coro = SvRV (coro);
791
792	stash = SvSTASH (coro);
793	if (stash != coro_stash && stash != coro_state_stash)
794	{
795	/* very slow, but rare, check */
796	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
797	croak ("Coro::State object required");
798	}
799
800	mg = SvMAGIC (coro);
801	assert (mg->mg_type == PERL_MAGIC_ext);
802	return (struct coro *)mg->mg_ptr;
803	}
804
805	static void	1174	static void
		1175	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1176	{
		1177	ta->prev = SvSTATE (prev_sv);
		1178	ta->next = SvSTATE (next_sv);
		1179	TRANSFER_CHECK (*ta);
		1180	}
		1181
		1182	static void
806	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1183	api_transfer (SV *prev_sv, SV *next_sv)
807	{	1184	{
808	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1185	dTHX;
		1186	struct transfer_args ta;
		1187
		1188	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1189	TRANSFER (ta);
809	}	1190	}
810		1191
811	/** Coro ********************************************************************/	1192	/** Coro ********************************************************************/
812		1193
813	#define PRIO_MAX 3
814	#define PRIO_HIGH 1
815	#define PRIO_NORMAL 0
816	#define PRIO_LOW -1
817	#define PRIO_IDLE -3
818	#define PRIO_MIN -4
819
820	/* for Coro.pm */
821	static GV *coro_current, *coro_idle;
822	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
823	static int coro_nready;
824
825	static void	1194	static void
826	coro_enq (pTHX_ SV *sv)	1195	coro_enq (pTHX_ SV *coro_sv)
827	{	1196	{
828	int prio;
829
830	if (SvTYPE (sv) != SVt_PVHV)
831	croak ("Coro::ready tried to enqueue something that is not a coroutine");
832
833	prio = SvSTATE (sv)->prio;
834
835	av_push (coro_ready [prio - PRIO_MIN], sv);	1197	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
836	coro_nready++;
837	}	1198	}
838		1199
839	static SV *	1200	static SV *
840	coro_deq (pTHX_ int min_prio)	1201	coro_deq (pTHX_ int min_prio)
841	{	1202	{
…		…
845	if (min_prio < 0)	1206	if (min_prio < 0)
846	min_prio = 0;	1207	min_prio = 0;
847		1208
848	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1209	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
849	if (AvFILLp (coro_ready [prio]) >= 0)	1210	if (AvFILLp (coro_ready [prio]) >= 0)
850	{
851	coro_nready--;
852	return av_shift (coro_ready [prio]);	1211	return av_shift (coro_ready [prio]);
853	}
854		1212
855	return 0;	1213	return 0;
856	}	1214	}
857		1215
858	static void	1216	static int
859	api_ready (SV *coro)	1217	api_ready (SV *coro_sv)
860	{	1218	{
861	dTHX;	1219	dTHX;
		1220	struct coro *coro;
862		1221
863	if (SvROK (coro))	1222	if (SvROK (coro_sv))
864	coro = SvRV (coro);	1223	coro_sv = SvRV (coro_sv);
		1224
		1225	coro = SvSTATE (coro_sv);
		1226
		1227	if (coro->flags & CF_READY)
		1228	return 0;
		1229
		1230	coro->flags |= CF_READY;
865		1231
866	LOCK;	1232	LOCK;
867	coro_enq (aTHX_ SvREFCNT_inc (coro));	1233	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1234	++coro_nready;
868	UNLOCK;	1235	UNLOCK;
		1236
		1237	return 1;
		1238	}
		1239
		1240	static int
		1241	api_is_ready (SV *coro_sv)
		1242	{
		1243	dTHX;
		1244	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1245	}
		1246
		1247	static void
		1248	prepare_schedule (pTHX_ struct transfer_args *ta)
		1249	{
		1250	SV *prev_sv, *next_sv;
		1251
		1252	for (;;)
		1253	{
		1254	LOCK;
		1255	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1256
		1257	/* nothing to schedule: call the idle handler */
		1258	if (expect_false (!next_sv))
		1259	{
		1260	dSP;
		1261	UNLOCK;
		1262
		1263	ENTER;
		1264	SAVETMPS;
		1265
		1266	PUSHMARK (SP);
		1267	PUTBACK;
		1268	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1269
		1270	FREETMPS;
		1271	LEAVE;
		1272	continue;
		1273	}
		1274
		1275	ta->next = SvSTATE (next_sv);
		1276
		1277	/* cannot transfer to destroyed coros, skip and look for next */
		1278	if (expect_false (ta->next->flags & CF_DESTROYED))
		1279	{
		1280	UNLOCK;
		1281	SvREFCNT_dec (next_sv);
		1282	/* coro_nready is already taken care of by destroy */
		1283	continue;
		1284	}
		1285
		1286	--coro_nready;
		1287	UNLOCK;
		1288	break;
		1289	}
		1290
		1291	/* free this only after the transfer */
		1292	prev_sv = SvRV (coro_current);
		1293	ta->prev = SvSTATE (prev_sv);
		1294	TRANSFER_CHECK (*ta);
		1295	assert (ta->next->flags & CF_READY);
		1296	ta->next->flags &= ~CF_READY;
		1297	SvRV_set (coro_current, next_sv);
		1298
		1299	LOCK;
		1300	free_coro_mortal (aTHX);
		1301	coro_mortal = prev_sv;
		1302	UNLOCK;
		1303	}
		1304
		1305	static void
		1306	prepare_cede (pTHX_ struct transfer_args *ta)
		1307	{
		1308	api_ready (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	}
		1311
		1312	static int
		1313	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1314	{
		1315	if (coro_nready)
		1316	{
		1317	SV *prev = SvRV (coro_current);
		1318	prepare_schedule (aTHX_ ta);
		1319	api_ready (prev);
		1320	return 1;
		1321	}
		1322	else
		1323	return 0;
869	}	1324	}
870		1325
871	static void	1326	static void
872	api_schedule (void)	1327	api_schedule (void)
873	{	1328	{
874	dTHX;	1329	dTHX;
		1330	struct transfer_args ta;
875		1331
876	SV *prev, *next;	1332	prepare_schedule (aTHX_ &ta);
877	SV *current = GvSV (coro_current);	1333	TRANSFER (ta);
878
879	for (;;)
880	{
881	LOCK;
882
883	next = coro_deq (aTHX_ PRIO_MIN);
884
885	if (next)
886	break;
887
888	UNLOCK;
889
890	{
891	dSP;
892
893	ENTER;
894	SAVETMPS;
895
896	PUSHMARK (SP);
897	PUTBACK;
898	call_sv (GvSV (coro_idle), G_DISCARD);
899
900	FREETMPS;
901	LEAVE;
902	}
903	}
904
905	prev = SvRV (current);
906	SvRV (current) = next;
907
908	/* free this only after the transfer */
909	coro_mortal = prev;
910
911	UNLOCK;
912
913	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
914	}	1334	}
915		1335
916	static int coro_cede_self;
917
918	static void	1336	static int
919	api_cede (void)	1337	api_cede (void)
920	{	1338	{
921	dTHX;	1339	dTHX;
922	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1340	struct transfer_args ta;
923		1341
924	LOCK;	1342	prepare_cede (aTHX_ &ta);
925		1343
926	if (coro_cede_self)	1344	if (expect_true (ta.prev != ta.next))
927	{	1345	{
928	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1346	TRANSFER (ta);
929	av_unshift (runqueue, 1);	1347	return 1;
930	av_store (runqueue, 0, current);
931	coro_nready++;
932	coro_cede_self = 0;
933	}	1348	}
934	else	1349	else
935	coro_enq (aTHX_ current);	1350	return 0;
936
937	UNLOCK;
938
939	api_schedule ();
940	}	1351	}
941		1352
		1353	static int
		1354	api_cede_notself (void)
		1355	{
		1356	dTHX;
		1357	struct transfer_args ta;
		1358
		1359	if (prepare_cede_notself (aTHX_ &ta))
		1360	{
		1361	TRANSFER (ta);
		1362	return 1;
		1363	}
		1364	else
		1365	return 0;
		1366	}
		1367
		1368	static void
		1369	api_trace (SV *coro_sv, int flags)
		1370	{
		1371	dTHX;
		1372	struct coro *coro = SvSTATE (coro_sv);
		1373
		1374	if (flags & CC_TRACE)
		1375	{
		1376	if (!coro->cctx)
		1377	coro->cctx = cctx_new ();
		1378	else if (!(coro->cctx->flags & CC_TRACE))
		1379	croak ("cannot enable tracing on coroutine with custom stack");
		1380
		1381	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1382	}
		1383	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1384	{
		1385	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1386
		1387	if (coro->flags & CF_RUNNING)
		1388	PL_runops = RUNOPS_DEFAULT;
		1389	else
		1390	coro->runops = RUNOPS_DEFAULT;
		1391	}
		1392	}
		1393
942	MODULE = Coro::State PACKAGE = Coro::State	1394	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
943		1395
944	PROTOTYPES: DISABLE	1396	PROTOTYPES: DISABLE
945		1397
946	BOOT:	1398	BOOT:
947	{	1399	{
948	#ifdef USE_ITHREADS	1400	#ifdef USE_ITHREADS
949	MUTEX_INIT (&coro_mutex);	1401	MUTEX_INIT (&coro_mutex);
950	#endif	1402	#endif
951	BOOT_PAGESIZE;	1403	BOOT_PAGESIZE;
952		1404
		1405	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1406	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1407
953	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1408	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
954		1409
955	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1410	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
956	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1411	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
957	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1412	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1413	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
958		1414
959	main_mainstack = PL_mainstack;	1415	main_mainstack = PL_mainstack;
		1416	main_top_env = PL_top_env;
		1417
		1418	while (main_top_env->je_prev)
		1419	main_top_env = main_top_env->je_prev;
960		1420
961	coroapi.ver = CORO_API_VERSION;	1421	coroapi.ver = CORO_API_VERSION;
962	coroapi.transfer = api_transfer;	1422	coroapi.transfer = api_transfer;
963
964	Newz (0, main_stack, 1, coro_stack);
965	main_stack->idle_sp = (void *)-1;
966		1423
967	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1424	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
968	}	1425	}
969		1426
970	SV *	1427	SV *
…		…
974	struct coro *coro;	1431	struct coro *coro;
975	HV *hv;	1432	HV *hv;
976	int i;	1433	int i;
977		1434
978	Newz (0, coro, 1, struct coro);	1435	Newz (0, coro, 1, struct coro);
979	coro->args = newAV ();	1436	coro->args = newAV ();
		1437	coro->flags = CF_NEW;
980		1438
		1439	if (coro_first) coro_first->prev = coro;
		1440	coro->next = coro_first;
		1441	coro_first = coro;
		1442
981	hv = newHV ();	1443	coro->hv = hv = newHV ();
982	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1444	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
983	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1445	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984		1446
985	av_push (coro->args, newSVsv (RETVAL));	1447	av_extend (coro->args, items - 1);
986	for (i = 1; i < items; i++)	1448	for (i = 1; i < items; i++)
987	av_push (coro->args, newSVsv (ST (i)));	1449	av_push (coro->args, newSVsv (ST (i)));
988
989	coro->stack = main_stack;
990	/*coro->mainstack = 0; *//*actual work is done inside transfer */
991	/*coro->stack = 0;*/
992	}	1450	}
993	OUTPUT:	1451	OUTPUT:
994	RETVAL	1452	RETVAL
995		1453
		1454	# these not obviously related functions are all rolled into the same xs
		1455	# function to increase chances that they all will call transfer with the same
		1456	# stack offset
996	void	1457	void
997	transfer (prev, next, flags)	1458	_set_stacklevel (...)
998	SV *prev	1459	ALIAS:
999	SV *next	1460	Coro::State::transfer = 1
1000	int flags	1461	Coro::schedule = 2
		1462	Coro::cede = 3
		1463	Coro::cede_notself = 4
1001	CODE:	1464	CODE:
1002	PUTBACK;
1003	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1004	SPAGAIN;
1005
1006	int
1007	prio (Coro::State coro, int newprio = 0)
1008	ALIAS:
1009	nice = 1
1010	CODE:
1011	{	1465	{
1012	RETVAL = coro->prio;	1466	struct transfer_args ta;
1013		1467
1014	if (items > 1)	1468	switch (ix)
1015	{	1469	{
		1470	case 0:
		1471	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1472	ta.next = 0;
		1473	break;
		1474
		1475	case 1:
1016	if (ix)	1476	if (items != 2)
1017	newprio += coro->prio;	1477	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1018		1478
1019	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1479	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1020	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1480	break;
1021		1481
1022	coro->prio = newprio;	1482	case 2:
		1483	prepare_schedule (aTHX_ &ta);
		1484	break;
		1485
		1486	case 3:
		1487	prepare_cede (aTHX_ &ta);
		1488	break;
		1489
		1490	case 4:
		1491	if (!prepare_cede_notself (aTHX_ &ta))
		1492	XSRETURN_EMPTY;
		1493
		1494	break;
1023	}	1495	}
1024	}
1025		1496
1026	void	1497	BARRIER;
1027	_clear_idle_sp (Coro::State self)	1498	TRANSFER (ta);
		1499
		1500	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1501	XSRETURN_YES;
		1502	}
		1503
		1504	bool
		1505	_destroy (SV *coro_sv)
1028	CODE:	1506	CODE:
1029	self->stack->idle_sp = 0;	1507	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1030		1508	OUTPUT:
1031	void	1509	RETVAL
1032	_clone_state_from (SV *dst, SV *src)
1033	CODE:
1034	{
1035	struct coro *coro_src = SvSTATE (src);
1036
1037	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1038
1039	++coro_src->refcnt;
1040	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1041	}
1042		1510
1043	void	1511	void
1044	_exit (code)	1512	_exit (code)
1045	int code	1513	int code
1046	PROTOTYPE: $	1514	PROTOTYPE: $
1047	CODE:	1515	CODE:
1048	_exit (code);	1516	_exit (code);
1049		1517
1050	MODULE = Coro::State PACKAGE = Coro::Cont	1518	int
		1519	cctx_stacksize (int new_stacksize = 0)
		1520	CODE:
		1521	RETVAL = coro_stacksize;
		1522	if (new_stacksize)
		1523	coro_stacksize = new_stacksize;
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	int
		1528	cctx_count ()
		1529	CODE:
		1530	RETVAL = cctx_count;
		1531	OUTPUT:
		1532	RETVAL
		1533
		1534	int
		1535	cctx_idle ()
		1536	CODE:
		1537	RETVAL = cctx_idle;
		1538	OUTPUT:
		1539	RETVAL
1051		1540
1052	void	1541	void
1053	yield (...)	1542	list ()
1054	PROTOTYPE: @	1543	PPCODE:
		1544	{
		1545	struct coro *coro;
		1546	for (coro = coro_first; coro; coro = coro->next)
		1547	if (coro->hv)
		1548	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1549	}
		1550
		1551	void
		1552	call (Coro::State coro, SV *coderef)
		1553	ALIAS:
		1554	eval = 1
		1555	CODE:
		1556	{
		1557	if (coro->mainstack)
		1558	{
		1559	struct coro temp;
		1560	Zero (&temp, 1, struct coro);
		1561
		1562	if (!(coro->flags & CF_RUNNING))
		1563	{
		1564	save_perl (aTHX_ &temp);
		1565	load_perl (aTHX_ coro);
		1566	}
		1567
		1568	{
		1569	dSP;
		1570	ENTER;
		1571	SAVETMPS;
		1572	PUSHMARK (SP);
		1573	PUTBACK;
		1574	if (ix)
		1575	eval_sv (coderef, 0);
		1576	else
		1577	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1578	SPAGAIN;
		1579	FREETMPS;
		1580	LEAVE;
		1581	PUTBACK;
		1582	}
		1583
		1584	if (!(coro->flags & CF_RUNNING))
		1585	{
		1586	save_perl (aTHX_ coro);
		1587	load_perl (aTHX_ &temp);
		1588	}
		1589	}
		1590	}
		1591
		1592	SV *
		1593	is_ready (Coro::State coro)
		1594	PROTOTYPE: $
		1595	ALIAS:
		1596	is_ready = CF_READY
		1597	is_running = CF_RUNNING
		1598	is_new = CF_NEW
		1599	is_destroyed = CF_DESTROYED
		1600	CODE:
		1601	RETVAL = boolSV (coro->flags & ix);
		1602	OUTPUT:
		1603	RETVAL
		1604
		1605	void
		1606	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1607
		1608	SV *
		1609	has_stack (Coro::State coro)
		1610	PROTOTYPE: $
		1611	CODE:
		1612	RETVAL = boolSV (!!coro->cctx);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	int
		1617	is_traced (Coro::State coro)
		1618	PROTOTYPE: $
		1619	CODE:
		1620	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	IV
		1625	rss (Coro::State coro)
		1626	PROTOTYPE: $
		1627	ALIAS:
		1628	usecount = 1
1055	CODE:	1629	CODE:
1056	{	1630	switch (ix)
1057	SV *yieldstack;	1631	{
1058	SV *sv;	1632	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	AV *defav = GvAV (PL_defgv);	1633	case 1: RETVAL = coro->usecount; break;
1060	struct coro *prev, *next;
1061
1062	yieldstack = *hv_fetch (
1063	(HV *)SvRV (GvSV (coro_current)),
1064	"yieldstack", sizeof ("yieldstack") - 1,
1065	0	1634	}
1066	);	1635	OUTPUT:
		1636	RETVAL
1067		1637
1068	/* set up @_ -- ugly */
1069	av_clear (defav);
1070	av_fill (defav, items - 1);
1071	while (items--)
1072	av_store (defav, items, SvREFCNT_inc (ST(items)));
1073
1074	sv = av_pop ((AV *)SvRV (yieldstack));
1075	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1076	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1077	SvREFCNT_dec (sv);
1078
1079	coro_state_transfer (aTHX_ prev, next, 0);
1080	}
1081		1638
1082	MODULE = Coro::State PACKAGE = Coro	1639	MODULE = Coro::State PACKAGE = Coro
1083		1640
1084	BOOT:	1641	BOOT:
1085	{	1642	{
1086	int i;	1643	int i;
		1644
		1645	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1646	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1647	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1648
		1649	coro_current = get_sv ("Coro::current", FALSE);
		1650	SvREADONLY_on (coro_current);
1087		1651
1088	coro_stash = gv_stashpv ("Coro", TRUE);	1652	coro_stash = gv_stashpv ("Coro", TRUE);
1089		1653
1090	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1654	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1091	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1655	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1092	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1656	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1093	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1657	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1094	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1658	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1095	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1659	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1096		1660
1097	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1098	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1099
1100	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1661	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1101	coro_ready[i] = newAV ();	1662	coro_ready[i] = newAV ();
1102		1663
1103	{	1664	{
1104	SV *sv = perl_get_sv("Coro::API", 1);	1665	SV *sv = perl_get_sv("Coro::API", 1);
1105		1666
1106	coroapi.schedule = api_schedule;	1667	coroapi.schedule = api_schedule;
1107	coroapi.cede = api_cede;	1668	coroapi.cede = api_cede;
		1669	coroapi.cede_notself = api_cede_notself;
1108	coroapi.ready = api_ready;	1670	coroapi.ready = api_ready;
		1671	coroapi.is_ready = api_is_ready;
1109	coroapi.nready = &coro_nready;	1672	coroapi.nready = &coro_nready;
1110	coroapi.current = coro_current;	1673	coroapi.current = coro_current;
1111		1674
1112	GCoroAPI = &coroapi;	1675	GCoroAPI = &coroapi;
1113	sv_setiv (sv, (IV)&coroapi);	1676	sv_setiv (sv, (IV)&coroapi);
1114	SvREADONLY_on (sv);	1677	SvREADONLY_on (sv);
1115	}	1678	}
1116	}	1679	}
1117		1680
1118	void	1681	void
		1682	_set_current (SV *current)
		1683	PROTOTYPE: $
		1684	CODE:
		1685	SvREFCNT_dec (SvRV (coro_current));
		1686	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1687
		1688	int
		1689	prio (Coro::State coro, int newprio = 0)
		1690	ALIAS:
		1691	nice = 1
		1692	CODE:
		1693	{
		1694	RETVAL = coro->prio;
		1695
		1696	if (items > 1)
		1697	{
		1698	if (ix)
		1699	newprio = coro->prio - newprio;
		1700
		1701	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1702	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1703
		1704	coro->prio = newprio;
		1705	}
		1706	}
		1707	OUTPUT:
		1708	RETVAL
		1709
		1710	SV *
1119	ready (SV *self)	1711	ready (SV *self)
1120	PROTOTYPE: $	1712	PROTOTYPE: $
1121	CODE:	1713	CODE:
1122	api_ready (self);	1714	RETVAL = boolSV (api_ready (self));
		1715	OUTPUT:
		1716	RETVAL
1123		1717
1124	int	1718	int
1125	nready (...)	1719	nready (...)
1126	PROTOTYPE:	1720	PROTOTYPE:
1127	CODE:	1721	CODE:
1128	RETVAL = coro_nready;	1722	RETVAL = coro_nready;
1129	OUTPUT:	1723	OUTPUT:
1130	RETVAL	1724	RETVAL
1131		1725
		1726	# for async_pool speedup
1132	void	1727	void
1133	schedule (...)	1728	_pool_1 (SV *cb)
1134	PROTOTYPE:
1135	CODE:	1729	CODE:
1136	api_schedule ();	1730	{
		1731	struct coro *coro = SvSTATE (coro_current);
		1732	HV *hv = (HV *)SvRV (coro_current);
		1733	AV *defav = GvAV (PL_defgv);
		1734	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1735	AV *invoke_av;
		1736	int i, len;
		1737
		1738	if (!invoke)
		1739	croak ("\3terminate\2\n");
		1740
		1741	SvREFCNT_dec (coro->saved_deffh);
		1742	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1743
		1744	hv_store (hv, "desc", sizeof ("desc") - 1,
		1745	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1746
		1747	invoke_av = (AV *)SvRV (invoke);
		1748	len = av_len (invoke_av);
		1749
		1750	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1751
		1752	if (len > 0)
		1753	{
		1754	av_fill (defav, len - 1);
		1755	for (i = 0; i < len; ++i)
		1756	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1757	}
		1758
		1759	SvREFCNT_dec (invoke);
		1760	}
1137		1761
1138	void	1762	void
1139	_set_cede_self ()	1763	_pool_2 (SV *cb)
1140	CODE:	1764	CODE:
1141	coro_cede_self = 1;	1765	{
		1766	struct coro *coro = SvSTATE (coro_current);
1142		1767
1143	void	1768	sv_setsv (cb, &PL_sv_undef);
1144	cede (...)	1769
1145	PROTOTYPE:	1770	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1146	CODE:	1771	coro->saved_deffh = 0;
1147	api_cede ();	1772
		1773	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1774	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1775	croak ("\3terminate\2\n");
		1776
		1777	av_clear (GvAV (PL_defgv));
		1778	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1779	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1780
		1781	coro->prio = 0;
		1782
		1783	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1784	api_trace (coro_current, 0);
		1785
		1786	av_push (av_async_pool, newSVsv (coro_current));
		1787	}
		1788
1148		1789
1149	MODULE = Coro::State PACKAGE = Coro::AIO	1790	MODULE = Coro::State PACKAGE = Coro::AIO
1150		1791
1151	SV *	1792	SV *
1152	_get_state ()	1793	_get_state ()
1153	CODE:	1794	CODE:
1154	{	1795	{
1155	struct {	1796	struct io_state *data;
1156	int errorno;
1157	int laststype;
1158	int laststatval;
1159	Stat_t statcache;
1160	} data;
1161		1797
		1798	RETVAL = newSV (sizeof (struct io_state));
		1799	data = (struct io_state *)SvPVX (RETVAL);
		1800	SvCUR_set (RETVAL, sizeof (struct io_state));
		1801	SvPOK_only (RETVAL);
		1802
1162	data.errorno = errno;	1803	data->errorno = errno;
1163	data.laststype = PL_laststype;	1804	data->laststype = PL_laststype;
1164	data.laststatval = PL_laststatval;	1805	data->laststatval = PL_laststatval;
1165	data.statcache = PL_statcache;	1806	data->statcache = PL_statcache;
1166
1167	RETVAL = newSVpvn ((char *)&data, sizeof data);
1168	}	1807	}
1169	OUTPUT:	1808	OUTPUT:
1170	RETVAL	1809	RETVAL
1171		1810
1172	void	1811	void
1173	_set_state (char *data_)	1812	_set_state (char *data_)
1174	PROTOTYPE: $	1813	PROTOTYPE: $
1175	CODE:	1814	CODE:
1176	{	1815	{
1177	struct {	1816	struct io_state *data = (void *)data_;
1178	int errorno;
1179	int laststype;
1180	int laststatval;
1181	Stat_t statcache;
1182	} *data = (void *)data_;
1183		1817
1184	errno = data->errorno;	1818	errno = data->errorno;
1185	PL_laststype = data->laststype;	1819	PL_laststype = data->laststype;
1186	PL_laststatval = data->laststatval;	1820	PL_laststatval = data->laststatval;
1187	PL_statcache = data->statcache;	1821	PL_statcache = data->statcache;
1188	}	1822	}
		1823

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