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Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.230 by root, Mon Apr 14 11:28:59 2008 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
		40	#if CORO_USE_VALGRIND
		41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	57	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	58	# define PL_ppaddr ppaddr
14	# endif	59	# endif
15	# ifndef call_sv	60	# ifndef call_sv
16	# define call_sv perl_call_sv	61	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
29	# endif	74	# endif
30	#endif	75	#endif
31		76
32	#include <errno.h>	77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
		90	/* 5.8.7 */
		91	#ifndef SvRV_set
		92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
33		94
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	96	# 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	97	#endif
52	# include <limits.h>	98
53	# ifndef PAGESIZE	99	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	100	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	101	#endif
60	#endif
61		102
62	#define SUB_INIT "Coro::State::initialize"	103	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	104	#ifndef CORO_PREFER_PERL_FUNCTIONS
		105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
64		107
65	/* The next macro should declare a variable stacklevel that contains and approximation	108	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	109	* portable way as possible. */
67	* and should be unique. */	110	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	111	#define STACKLEVEL ((void *)&stacklevel)
69		112
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		114
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	115	#if __GNUC__ >= 3
		116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
		119	#else
		120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
		123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
		127
		128	#define NOINLINE attribute ((noinline))
73		129
74	#include "CoroAPI.h"	130	#include "CoroAPI.h"
75		131
76	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
…		…
80	#else	136	#else
81	# define LOCK (void)0	137	# define LOCK (void)0
82	# define UNLOCK (void)0	138	# define UNLOCK (void)0
83	#endif	139	#endif
84		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	154	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
91		156
92	/* this is actually not only the c stack but also c registers etc... */	157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
		167
		168	static struct coro_cctx *cctx_first;
		169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
		179
		180	/* this is a structure representing a c-level coroutine */
		181	typedef struct coro_cctx {
		182	struct coro_cctx *next;
		183
		184	/* the stack */
		185	void *sptr;
		186	size_t ssize;
		187
		188	/* cpu state */
		189	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		190	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		191	JMPENV *top_env;
		192	coro_context cctx;
		193
		194	#if CORO_USE_VALGRIND
		195	int valgrind_id;
		196	#endif
		197	unsigned char flags;
		198	} coro_cctx;
		199
		200	enum {
		201	CF_RUNNING = 0x0001, /* coroutine is running */
		202	CF_READY = 0x0002, /* coroutine is ready */
		203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
93	typedef struct {	208	typedef struct {
94	int refcnt; /* pointer reference counter */	209	SV *defsv;
95	int usecnt; /* shared by how many coroutines */	210	AV *defav;
96	int gencnt; /* generation counter */	211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
97		217
98	coro_context cctx;	218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99		219
100	void *sptr;	220	/* this is a structure representing a perl-level coroutine */
101	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103
104	struct coro {	221	struct coro {
105	/* the optional C context */	222	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	223	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109		224
110	/* optionally saved, might be zero */	225	/* process data */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;	226	AV *mainstack;
123	SV **stack_sp;	227	perl_slots *slot; /* basically the saved sp */
124	OP *op;	228
125	SV **curpad;	229	AV *args; /* data associated with this coroutine (initial args) */
126	AV *comppad;	230	int refcnt; /* coroutines are refcounted, yes */
127	CV *compcv;	231	int flags; /* CF_ flags */
128	SV **stack_base;	232	HV *hv; /* the perl hash associated with this coro, if any */
129	SV **stack_max;	233
130	SV **tmps_stack;	234	/* statistics */
131	I32 tmps_floor;	235	int usecount; /* number of transfers to this coro */
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		236
150	/* coro process data */	237	/* coro process data */
151	int prio;	238	int prio;
		239	SV *throw; /* exception to be thrown */
152		240
153	/* data associated with this coroutine (initial args) */	241	/* async_pool */
154	AV *args;	242	SV *saved_deffh;
155	int refcnt;	243
		244	/* linked list */
		245	struct coro *next, *prev;
156	};	246	};
157		247
158	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
160		250
		251	/** Coro ********************************************************************/
		252
		253	#define PRIO_MAX 3
		254	#define PRIO_HIGH 1
		255	#define PRIO_NORMAL 0
		256	#define PRIO_LOW -1
		257	#define PRIO_IDLE -3
		258	#define PRIO_MIN -4
		259
		260	/* for Coro.pm */
		261	static SV *coro_current;
		262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/** lowlevel stuff **********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,10,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
		278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,10,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,10,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
161	static AV *	298	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
163	{	300	{
164	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	302	AV *newpadlist, *newpad;
166		303
167	newpadlist = newAV ();	304	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	306	#if PERL_VERSION_ATLEAST (5,10,0)
		307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		308	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	310	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	312	--AvFILLp (padlist);
176		313
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	314	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
212		349
213	/* casting is fun. */	350	/* casting is fun. */
214	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
216		353
217	SvREFCNT_dec (av);
218
219	return 0;	354	return 0;
220	}	355	}
221		356
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
223		359
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
		364
		365	#define CORO_MAGIC(sv,type) \
		366	SvMAGIC (sv) \
		367	? SvMAGIC (sv)->mg_type == type \
		368	? SvMAGIC (sv) \
		369	: mg_find (sv, type) \
		370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
225		400
226	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
227	static void	402	static void
228	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
229	{	404	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
231		407
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	410	else
235	{	411	{
236	#if 0	412	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	413	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	414	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
242	#else	418	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	422	}
247		423
248	static void	424	static void
249	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
250	{	426	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
252		429
253	if (!mg)	430	if (expect_false (!mg))
254	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();
259	}
260		432
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	433	av = (AV *)mg->mg_obj;
262	}
263		434
264	#define SB do {	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
265	#define SE } while (0)	436	av_extend (av, AvMAX (av) + 1);
266		437
267	#define LOAD(state) load_state(aTHX_ (state));	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	439	}
269		440
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	441	/** load & save, init *******************************************************/
271		442
272	static void	443	static void
273	load_state(pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
274	{	445	{
275	PL_dowarn = c->dowarn;	446	perl_slots *slot = c->slot;
276	PL_in_eval = c->in_eval;	447	c->slot = 0;
277		448
278	PL_curstackinfo = c->curstackinfo;
279	PL_curstack = c->curstack;
280	PL_mainstack = c->mainstack;	449	PL_mainstack = c->mainstack;
281	PL_stack_sp = c->stack_sp;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308	PL_top_env = c->top_env;
309		450
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	451	GvSV (PL_defgv) = slot->defsv;
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	452	GvAV (PL_defgv) = slot->defav;
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
		456	#define VAR(name,type) PL_ ## name = slot->name;
		457	# include "state.h"
		458	#undef VAR
313		459
314	{	460	{
315	dSP;	461	dSP;
		462
316	CV *cv;	463	CV *cv;
317		464
318	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
320	{	467	{
321	AV *padlist = (AV *)POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
327	}	470	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	471	}
331		472
332	PUTBACK;	473	PUTBACK;
333	}	474	}
334	}	475	}
335		476
336	static void	477	static void
337	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
338	{	479	{
339	{	480	{
340	dSP;	481	dSP;
341	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	486	/*
346	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
348	*/	489	*/
349		490
350	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
352	for (;;)	493	for (;;)
353	{	494	{
354	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
355	{	496	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
357		498
358	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
359	{	500	{
360	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
361	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
362	{	504	{
363	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
374		509
		510	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
376	}	512	}
377	}	513	}
378	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)
380	{
381	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}
385	#endif
386	}	514	}
387		515
388	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
389	break;	517	break;
390		518
391	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
392	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
393	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
394	}	522	}
395		523
396	PUTBACK;	524	PUTBACK;
397	}	525	}
398		526
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
402		538
403	c->dowarn = PL_dowarn;
404	c->in_eval = PL_in_eval;
405
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;	540
410	c->op = PL_op;	541	{
411	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412	c->comppad = PL_comppad;	543
413	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
414	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
415	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
416	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
417	c->tmps_floor = PL_tmps_floor;	548
418	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
419	c->tmps_max = PL_tmps_max;	550	# include "state.h"
420	c->markstack = PL_markstack;	551	#undef VAR
421	c->markstack_ptr = PL_markstack_ptr;	552	}
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	c->top_env = PL_top_env;
437	}	553	}
438		554
439	/*	555	/*
440	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
444	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
445	static void	564	static void
446	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
447	{	566	{
448	LOCK;	567	PL_curstackinfo = new_stackinfo(32, 8);
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		571
455	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		575
459	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
460	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	579	PL_tmps_max = 32;
463		580
464	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
467		584
468	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
469	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
470	#endif	587	#endif
471		588
472	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
473	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
475		592
476	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
477	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	595	PL_savestack_max = 24;
479		596
480	#if PERL_VERSION < 9	597	#if !PERL_VERSION_ATLEAST (5,10,0)
481	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	600	PL_retstack_max = 4;
484	#endif	601	#endif
485
486	UNLOCK;
487	}	602	}
		603	#endif
488		604
489	/*	605	/*
490	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
491	*/	607	*/
492	static void	608	static void
493	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
494	{	610	{
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)	611	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
508		613
509	while (PL_curstackinfo)	614	while (PL_curstackinfo)
510	{	615	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
512		617
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		620
525	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	623	PL_curstackinfo = p;
528	}	624	}
529		625
530	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	627	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	629	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	630	#if !PERL_VERSION_ATLEAST (5,10,0)
535	Safefree (PL_retstack);	631	Safefree (PL_retstack);
536	#endif	632	#endif
537	}	633	}
538		634
539	static void	635	static size_t
540	allocate_stack (Coro__State ctx, int alloc)	636	coro_rss (pTHX_ struct coro *coro)
541	{	637	{
542	coro_stack *stack;	638	size_t rss = sizeof (*coro);
543		639
544	New (0, stack, 1, coro_stack);	640	if (coro->mainstack)
545
546	stack->refcnt = 1;
547	stack->usecnt = 1;
548	stack->gencnt = ctx->gencnt = 0;
549
550	if (alloc)
551	{	641	{
552	#if HAVE_MMAP	642	perl_slots tmp_slot;
553	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	643	perl_slots *slot;
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	644
555	if (stack->sptr != (void *)-1)	645	if (coro->flags & CF_RUNNING)
556	{	646	{
557	# if STACKGUARD	647	slot = &tmp_slot;
558	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	648
559	# endif	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
560	}	652	}
561	else	653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,10,0)
		665	rss += slot->retstack_max * sizeof (OP *);
562	#endif	666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
563	{	713	{
564	stack->ssize = - (STACKSIZE * (long)sizeof (long));	714	SV *old = *svp;
565	New (0, stack->sptr, STACKSIZE, long);	715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
566	}	718	}
567	}	719	}
568	else
569	stack->sptr = 0;
570		720
571	ctx->stack = stack;	721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
572	}	722	}
573		723
574	static void	724	static void
575	deallocate_stack (Coro__State ctx)	725	coro_setup (pTHX_ struct coro *coro)
576	{
577	coro_stack *stack = ctx->stack;
578
579	ctx->stack = 0;
580
581	if (stack)
582	{
583	if (!--stack->refcnt)
584	{
585	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);
588	else
589	#endif
590	Safefree (stack->sptr);
591
592	Safefree (stack);
593	}
594	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;
596	}
597	}
598
599	static void
600	setup_coro (void *arg)
601	{	726	{
602	/*	727	/*
603	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
604	*/	729	*/
605	dTHX;
606	dSP;
607	Coro__State ctx = (Coro__State)arg;
608	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609
610	coro_init_stacks (aTHX);	730	coro_init_stacks (aTHX);
611	/*PL_curcop = 0;*/	731
612	/*PL_in_eval = PL_in_eval;*/ /* inherit */	732	PL_runops = RUNOPS_DEFAULT;
		733	PL_curcop = &PL_compiling;
		734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
		736	PL_curpm = 0;
		737	PL_curpad = 0;
		738	PL_localizing = 0;
		739	PL_dirty = 0;
		740	PL_restartop = 0;
		741	#if PERL_VERSION_ATLEAST (5,10,0)
		742	PL_parser = 0;
		743	#endif
		744
		745	/* recreate the die/warn hooks */
		746	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		747	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		748
		749	GvSV (PL_defgv) = newSV (0);
		750	GvAV (PL_defgv) = coro->args; coro->args = 0;
		751	GvSV (PL_errgv) = newSV (0);
		752	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		753	PL_rs = newSVsv (GvSV (irsgv));
		754	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		755
		756	{
		757	dSP;
		758	LOGOP myop;
		759
		760	Zero (&myop, 1, LOGOP);
		761	myop.op_next = Nullop;
		762	myop.op_flags = OPf_WANT_VOID;
		763
		764	PUSHMARK (SP);
		765	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		766	PUTBACK;
		767	PL_op = (OP *)&myop;
		768	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		769	SPAGAIN;
		770	}
		771
		772	/* this newly created coroutine might be run on an existing cctx which most
		773	* likely was suspended in set_stacklevel, called from entersub.
		774	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		775	* so we ENTER here for symmetry
		776	*/
		777	ENTER;
		778	}
		779
		780	static void
		781	coro_destroy (pTHX_ struct coro *coro)
		782	{
		783	if (!IN_DESTRUCT)
		784	{
		785	/* restore all saved variables and stuff */
		786	LEAVE_SCOPE (0);
		787	assert (PL_tmps_floor == -1);
		788
		789	/* free all temporaries */
		790	FREETMPS;
		791	assert (PL_tmps_ix == -1);
		792
		793	/* unwind all extra stacks */
		794	POPSTACK_TO (PL_mainstack);
		795
		796	/* unwind main stack */
		797	dounwind (-1);
		798	}
		799
		800	SvREFCNT_dec (GvSV (PL_defgv));
613	SvREFCNT_dec (GvAV (PL_defgv));	801	SvREFCNT_dec (GvAV (PL_defgv));
614	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	802	SvREFCNT_dec (GvSV (PL_errgv));
		803	SvREFCNT_dec (PL_defoutgv);
		804	SvREFCNT_dec (PL_rs);
		805	SvREFCNT_dec (GvSV (irsgv));
615		806
616	SPAGAIN;	807	SvREFCNT_dec (PL_diehook);
		808	SvREFCNT_dec (PL_warnhook);
		809
		810	SvREFCNT_dec (coro->saved_deffh);
		811	SvREFCNT_dec (coro->throw);
617		812
618	if (ctx->stack)	813	coro_destroy_stacks (aTHX);
619	{
620	ctx->cursp = 0;
621
622	PUSHMARK(SP);
623	PUTBACK;
624	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
625
626	if (SvTRUE (ERRSV))
627	croak (NULL);
628	else
629	croak ("FATAL: CCTXT coroutine returned!");
630	}
631	else
632	{
633	UNOP myop;
634
635	Zero(&myop, 1, UNOP);
636	myop.op_next = Nullop;
637	myop.op_flags = OPf_WANT_VOID;
638
639	PL_op = (OP *)&myop;
640
641	PUSHMARK(SP);
642	XPUSHs (sub_init);
643	/*
644	* the next line is slightly wrong, as PL_op->op_next
645	* is actually being executed so we skip the first op.
646	* that doesn't matter, though, since it is only
647	* pp_nextstate and we never return...
648	* ah yes, and I don't care anyways ;)
649	*/
650	PUTBACK;
651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652	SPAGAIN;
653
654	ENTER; /* necessary e.g. for dounwind */
655	}
656	}	814	}
657		815
658	static void	816	static void
659	continue_coro (void *arg)	817	free_coro_mortal (pTHX)
660	{	818	{
661	/*	819	if (expect_true (coro_mortal))
662	* this is a _very_ stripped down perl interpreter ;)	820	{
663	*/	821	SvREFCNT_dec (coro_mortal);
664	dTHX;	822	coro_mortal = 0;
665	Coro__State ctx = (Coro__State)arg;
666
667	PL_top_env = &PL_start_env;
668
669	ctx->cursp = 0;
670	PL_op = PL_op->op_next;
671	CALLRUNOPS(aTHX);
672
673	abort ();
674	}
675
676	/* never call directly, always through the coro_state_transfer global variable */
677	static void
678	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
679	{
680	dSTACKLEVEL;
681
682	if (prev != next)
683	{	823	}
684	/* has this coro been created yet? */	824	}
685	if (next->mainstack)	825
		826	static int
		827	runops_trace (pTHX)
		828	{
		829	COP *oldcop = 0;
		830	int oldcxix = -2;
		831	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		832	coro_cctx *cctx = coro->cctx;
		833
		834	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		835	{
		836	PERL_ASYNC_CHECK ();
		837
		838	if (cctx->flags & CC_TRACE_ALL)
686	{	839	{
687	LOCK;	840	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
688	SAVE (prev, flags);
689	LOAD (next);
690	UNLOCK;
691
692	/* mark this state as in-use */
693	next->mainstack = 0;
694	next->tmps_ix = -2;
695
696	/* stacklevel changed? if yes, grab the stack for us! */
697	if (flags & TRANSFER_SAVE_CCTXT)
698	{	841	{
699	if (!prev->stack)	842	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
700	allocate_stack (prev, 0);	843	SV **bot, **top;
701	else if (prev->cursp != stacklevel	844	AV *av = newAV (); /* return values */
702	&& prev->stack->usecnt > 1)	845	SV **cb;
		846	dSP;
		847
		848	GV *gv = CvGV (cx->blk_sub.cv);
		849	SV *fullname = sv_2mortal (newSV (0));
		850	if (isGV (gv))
		851	gv_efullname3 (fullname, gv, 0);
		852
		853	bot = PL_stack_base + cx->blk_oldsp + 1;
		854	top = cx->blk_gimme == G_ARRAY ? SP + 1
		855	: cx->blk_gimme == G_SCALAR ? bot + 1
		856	: bot;
		857
		858	av_extend (av, top - bot);
		859	while (bot < top)
		860	av_push (av, SvREFCNT_inc (*bot++));
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_no);
		868	PUSHs (fullname);
		869	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		872	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	if (oldcop != PL_curcop)
		880	{
		881	oldcop = PL_curcop;
		882
		883	if (PL_curcop != &PL_compiling)
703	{	884	{
704	prev->gencnt = ++prev->stack->gencnt;	885	SV **cb;
705	prev->stack->usecnt = 1;
706	}
707		886
708	/* has our stack been invalidated? */	887	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
709	if (next->stack && next->stack->gencnt != next->gencnt)
710	{	888	{
711	deallocate_stack (next);	889	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
712	allocate_stack (next, 1);	890
713	coro_create (&(next->stack->cctx),	891	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
714	continue_coro, (void *)next,	892	{
715	next->stack->sptr, labs (next->stack->ssize));	893	runops_proc_t old_runops = PL_runops;
		894	dSP;
		895	GV *gv = CvGV (cx->blk_sub.cv);
		896	SV *fullname = sv_2mortal (newSV (0));
		897
		898	if (isGV (gv))
		899	gv_efullname3 (fullname, gv, 0);
		900
		901	PL_runops = RUNOPS_DEFAULT;
		902	ENTER;
		903	SAVETMPS;
		904	EXTEND (SP, 3);
		905	PUSHMARK (SP);
		906	PUSHs (&PL_sv_yes);
		907	PUSHs (fullname);
		908	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		909	PUTBACK;
		910	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		911	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		912	SPAGAIN;
		913	FREETMPS;
		914	LEAVE;
		915	PL_runops = runops_trace;
		916	}
		917
		918	oldcxix = cxstack_ix;
716	}	919	}
717		920
718	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	921	if (cctx->flags & CC_TRACE_LINE)
719	prev->cursp = stacklevel;
720	/* don't add any code here */
721	}
722	else
723	next->cursp = stacklevel;
724	}
725	else if (next->tmps_ix == -2)
726	croak ("tried to transfer to running coroutine");
727	else
728	{
729	LOCK;
730	SAVE (prev, -1); /* first get rid of the old state */
731	UNLOCK;
732
733	/* create the coroutine for the first time */
734	if (flags & TRANSFER_SAVE_CCTXT)
735	{
736	if (!prev->stack)
737	allocate_stack (prev, 0);
738
739	/* the new coroutine starts with start_env again */
740	PL_top_env = &PL_start_env;
741
742	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743	{	922	{
744	setup_coro (next);	923	dSP;
745	next->cursp = stacklevel;
746		924
747	prev->stack->refcnt++;	925	PL_runops = RUNOPS_DEFAULT;
748	prev->stack->usecnt++;	926	ENTER;
749	next->stack = prev->stack;	927	SAVETMPS;
750	next->gencnt = prev->gencnt;	928	EXTEND (SP, 3);
		929	PL_runops = RUNOPS_DEFAULT;
		930	PUSHMARK (SP);
		931	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		932	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		933	PUTBACK;
		934	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		935	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		936	SPAGAIN;
		937	FREETMPS;
		938	LEAVE;
		939	PL_runops = runops_trace;
751	}	940	}
752	else
753	{
754	assert (!next->stack);
755	allocate_stack (next, 1);
756	coro_create (&(next->stack->cctx),
757	setup_coro, (void *)next,
758	next->stack->sptr, labs (next->stack->ssize));
759	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760	prev->cursp = stacklevel;
761	/* don't add any code here */
762	}	941	}
763	}	942	}
		943	}
		944	}
		945
		946	TAINT_NOT;
		947	return 0;
		948	}
		949
		950	/* inject a fake call to Coro::State::_cctx_init into the execution */
		951	/* _cctx_init should be careful, as it could be called at almost any time */
		952	/* during execution of a perl program */
		953	static void NOINLINE
		954	cctx_prepare (pTHX_ coro_cctx *cctx)
		955	{
		956	dSP;
		957	LOGOP myop;
		958
		959	PL_top_env = &PL_start_env;
		960
		961	if (cctx->flags & CC_TRACE)
		962	PL_runops = runops_trace;
		963
		964	Zero (&myop, 1, LOGOP);
		965	myop.op_next = PL_op;
		966	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		967
		968	PUSHMARK (SP);
		969	EXTEND (SP, 2);
		970	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		971	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		972	PUTBACK;
		973	PL_op = (OP *)&myop;
		974	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		975	SPAGAIN;
		976	}
		977
		978	/*
		979	* this is a _very_ stripped down perl interpreter ;)
		980	*/
		981	static void
		982	cctx_run (void *arg)
		983	{
		984	dTHX;
		985
		986	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		987	UNLOCK;
		988
		989	/* we now skip the entersub that lead to transfer() */
		990	PL_op = PL_op->op_next;
		991
		992	/* inject a fake subroutine call to cctx_init */
		993	cctx_prepare (aTHX_ (coro_cctx *)arg);
		994
		995	/* somebody or something will hit me for both perl_run and PL_restartop */
		996	PL_restartop = PL_op;
		997	perl_run (PL_curinterp);
		998
		999	/*
		1000	* If perl-run returns we assume exit() was being called or the coro
		1001	* fell off the end, which seems to be the only valid (non-bug)
		1002	* reason for perl_run to return. We try to exit by jumping to the
		1003	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1004	* coroutine as Coro has no such concept
		1005	*/
		1006	PL_top_env = main_top_env;
		1007	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1008	}
		1009
		1010	static coro_cctx *
		1011	cctx_new ()
		1012	{
		1013	coro_cctx *cctx;
		1014	void *stack_start;
		1015	size_t stack_size;
		1016
		1017	++cctx_count;
		1018
		1019	Newz (0, cctx, 1, coro_cctx);
		1020
		1021	#if HAVE_MMAP
		1022	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1023	/* mmap supposedly does allocate-on-write for us */
		1024	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1025
		1026	if (cctx->sptr != (void *)-1)
		1027	{
		1028	# if CORO_STACKGUARD
		1029	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1030	# endif
		1031	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1032	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1033	cctx->flags |= CC_MAPPED;
		1034	}
		1035	else
		1036	#endif
		1037	{
		1038	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1039	New (0, cctx->sptr, coro_stacksize, long);
		1040
		1041	if (!cctx->sptr)
		1042	{
		1043	perror ("FATAL: unable to allocate stack for coroutine");
		1044	_exit (EXIT_FAILURE);
		1045	}
		1046
		1047	stack_start = cctx->sptr;
		1048	stack_size = cctx->ssize;
		1049	}
		1050
		1051	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1052	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1053
		1054	return cctx;
		1055	}
		1056
		1057	static void
		1058	cctx_destroy (coro_cctx *cctx)
		1059	{
		1060	if (!cctx)
		1061	return;
		1062
		1063	--cctx_count;
		1064
		1065	#if CORO_USE_VALGRIND
		1066	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1067	#endif
		1068
		1069	#if HAVE_MMAP
		1070	if (cctx->flags & CC_MAPPED)
		1071	munmap (cctx->sptr, cctx->ssize);
		1072	else
		1073	#endif
		1074	Safefree (cctx->sptr);
		1075
		1076	Safefree (cctx);
		1077	}
		1078
		1079	/* wether this cctx should be destructed */
		1080	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1081
		1082	static coro_cctx *
		1083	cctx_get (pTHX)
		1084	{
		1085	while (expect_true (cctx_first))
		1086	{
		1087	coro_cctx *cctx = cctx_first;
		1088	cctx_first = cctx->next;
		1089	--cctx_idle;
		1090
		1091	if (expect_true (!CCTX_EXPIRED (cctx)))
		1092	return cctx;
		1093
		1094	cctx_destroy (cctx);
		1095	}
		1096
		1097	return cctx_new ();
		1098	}
		1099
		1100	static void
		1101	cctx_put (coro_cctx *cctx)
		1102	{
		1103	/* free another cctx if overlimit */
		1104	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1105	{
		1106	coro_cctx *first = cctx_first;
		1107	cctx_first = first->next;
		1108	--cctx_idle;
		1109
		1110	cctx_destroy (first);
		1111	}
		1112
		1113	++cctx_idle;
		1114	cctx->next = cctx_first;
		1115	cctx_first = cctx;
		1116	}
		1117
		1118	/** coroutine switching *****************************************************/
		1119
		1120	static void
		1121	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1122	{
		1123	if (expect_true (prev != next))
		1124	{
		1125	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1126	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1127
		1128	if (expect_false (next->flags & CF_RUNNING))
		1129	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (expect_false (next->flags & CF_DESTROYED))
		1132	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1133
		1134	#if !PERL_VERSION_ATLEAST (5,10,0)
		1135	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1136	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1137	#endif
		1138	}
		1139	}
		1140
		1141	/* always use the TRANSFER macro */
		1142	static void NOINLINE
		1143	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
		1144	{
		1145	dSTACKLEVEL;
		1146	static volatile int has_throw;
		1147
		1148	/* sometimes transfer is only called to set idle_sp */
		1149	if (expect_false (!next))
		1150	{
		1151	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1152	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1153	}
		1154	else if (expect_true (prev != next))
		1155	{
		1156	coro_cctx *prev__cctx;
		1157
		1158	if (expect_false (prev->flags & CF_NEW))
		1159	{
		1160	/* create a new empty context */
		1161	Newz (0, prev->cctx, 1, coro_cctx);
		1162	prev->flags &= ~CF_NEW;
		1163	prev->flags |= CF_RUNNING;
		1164	}
		1165
		1166	prev->flags &= ~CF_RUNNING;
		1167	next->flags |= CF_RUNNING;
		1168
		1169	LOCK;
		1170
		1171	/* first get rid of the old state */
		1172	save_perl (aTHX_ prev);
		1173
		1174	if (expect_false (next->flags & CF_NEW))
		1175	{
		1176	/* need to start coroutine */
		1177	next->flags &= ~CF_NEW;
		1178	/* setup coroutine call */
		1179	coro_setup (aTHX_ next);
		1180	}
764	else	1181	else
		1182	load_perl (aTHX_ next);
		1183
		1184	prev__cctx = prev->cctx;
		1185
		1186	/* possibly "free" the cctx */
		1187	if (expect_true (
		1188	prev__cctx->idle_sp == STACKLEVEL
		1189	&& !(prev__cctx->flags & CC_TRACE)
		1190	&& !force_cctx
		1191	))
		1192	{
		1193	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1194	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1195
		1196	prev->cctx = 0;
		1197
		1198	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1199	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1200	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1201	if (!next->cctx)
		1202	next->cctx = cctx_get (aTHX);
		1203
		1204	cctx_put (prev__cctx);
		1205	}
		1206
		1207	++next->usecount;
		1208
		1209	if (expect_true (!next->cctx))
		1210	next->cctx = cctx_get (aTHX);
		1211
		1212	has_throw = !!next->throw;
		1213
		1214	if (expect_false (prev__cctx != next->cctx))
		1215	{
		1216	prev__cctx->top_env = PL_top_env;
		1217	PL_top_env = next->cctx->top_env;
		1218	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1219	}
		1220
		1221	free_coro_mortal (aTHX);
		1222	UNLOCK;
		1223
		1224	if (expect_false (has_throw))
		1225	{
		1226	struct coro *coro = SvSTATE (coro_current);
		1227
		1228	if (coro->throw)
765	{	1229	{
		1230	SV *exception = coro->throw;
		1231	coro->throw = 0;
		1232	sv_setsv (ERRSV, exception);
766	setup_coro (next);	1233	croak (0);
767	next->cursp = stacklevel;
768	}	1234	}
769	}	1235	}
770	}	1236	}
771
772	LOCK;
773	if (coro_mortal)
774	{
775	SvREFCNT_dec (coro_mortal);
776	coro_mortal = 0;
777	}
778	UNLOCK;
779	}	1237	}
780		1238
781	/* use this function pointer to call the above function */	1239	struct transfer_args
782	/* this is done to increase chances of the compiler not inlining the call */	1240	{
783	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1241	struct coro *prev, *next;
		1242	};
784		1243
785	#define SV_CORO(sv,func) \	1244	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
786	do { \	1245	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
787	if (SvROK (sv)) \
788	sv = SvRV (sv); \
789	\
790	if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791	{ \
792	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793	\
794	if (!he) \
795	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796	\
797	(sv) = SvRV (HeVAL(he)); \
798	} \
799	\
800	/* must also be changed inside Coro::Cont::yield */ \
801	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803	\
804	} while(0)
805		1246
		1247	/** high level stuff ********************************************************/
		1248
806	static void	1249	static int
807	coro_state_destroy (struct coro *coro)	1250	coro_state_destroy (pTHX_ struct coro *coro)
808	{	1251	{
809	if (coro->refcnt--)	1252	if (coro->flags & CF_DESTROYED)
810	return;	1253	return 0;
		1254
		1255	coro->flags |= CF_DESTROYED;
		1256
		1257	if (coro->flags & CF_READY)
		1258	{
		1259	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1260	/* alternative: look through all ready queues and remove the coro */
		1261	LOCK;
		1262	--coro_nready;
		1263	UNLOCK;
		1264	}
		1265	else
		1266	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
811		1267
812	if (coro->mainstack && coro->mainstack != main_mainstack)	1268	if (coro->mainstack && coro->mainstack != main_mainstack)
813	{	1269	{
814	struct coro temp;	1270	struct coro temp;
815		1271
816	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1272	if (coro->flags & CF_RUNNING)
		1273	croak ("FATAL: tried to destroy currently running coroutine");
		1274
		1275	save_perl (aTHX_ &temp);
817	LOAD (aTHX_ coro);	1276	load_perl (aTHX_ coro);
818		1277
819	destroy_stacks (aTHX);	1278	coro_destroy (aTHX_ coro);
820		1279
821	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1280	load_perl (aTHX_ &temp);
822		1281
823	coro->mainstack = 0;	1282	coro->slot = 0;
824	}	1283	}
825		1284
826	deallocate_stack (coro);	1285	cctx_destroy (coro->cctx);
827	SvREFCNT_dec (coro->args);	1286	SvREFCNT_dec (coro->args);
828	Safefree (coro);	1287
		1288	if (coro->next) coro->next->prev = coro->prev;
		1289	if (coro->prev) coro->prev->next = coro->next;
		1290	if (coro == coro_first) coro_first = coro->next;
		1291
		1292	return 1;
829	}	1293	}
830		1294
831	static int	1295	static int
832	coro_state_clear (SV *sv, MAGIC *mg)	1296	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833	{	1297	{
834	struct coro *coro = (struct coro *)mg->mg_ptr;	1298	struct coro *coro = (struct coro *)mg->mg_ptr;
835	mg->mg_ptr = 0;	1299	mg->mg_ptr = 0;
836		1300
		1301	coro->hv = 0;
		1302
		1303	if (--coro->refcnt < 0)
		1304	{
837	coro_state_destroy (coro);	1305	coro_state_destroy (aTHX_ coro);
		1306	Safefree (coro);
		1307	}
838		1308
839	return 0;	1309	return 0;
840	}	1310	}
841		1311
842	static int	1312	static int
843	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1313	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844	{	1314	{
845	struct coro *coro = (struct coro *)mg->mg_ptr;	1315	struct coro *coro = (struct coro *)mg->mg_ptr;
846		1316
847	++coro->refcnt;	1317	++coro->refcnt;
848		1318
849	return 0;	1319	return 0;
850	}	1320	}
851		1321
852	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1322	static MGVTBL coro_state_vtbl = {
853		1323	0, 0, 0, 0,
854	static struct coro *	1324	coro_state_free,
855	SvSTATE (SV *coro)	1325	0,
856	{	1326	#ifdef MGf_DUP
857	MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro);	1327	coro_state_dup,
858	assert (mg->mg_type == PERL_MAGIC_ext);	1328	#else
859	return (struct coro *)mg->mg_ptr;	1329	# define MGf_DUP 0
860	}	1330	#endif
		1331	};
861		1332
862	static void	1333	static void
		1334	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1335	{
		1336	ta->prev = SvSTATE (prev_sv);
		1337	ta->next = SvSTATE (next_sv);
		1338	TRANSFER_CHECK (*ta);
		1339	}
		1340
		1341	static void
863	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1342	api_transfer (SV *prev_sv, SV *next_sv)
864	{	1343	{
865	SV_CORO (prev, "Coro::transfer");	1344	dTHX;
866	SV_CORO (next, "Coro::transfer");	1345	struct transfer_args ta;
867		1346
868	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1347	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1348	TRANSFER (ta, 1);
869	}	1349	}
870		1350
871	/** Coro ********************************************************************/	1351	/** Coro ********************************************************************/
872		1352
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1353	static void
886	coro_enq (pTHX_ SV *sv)	1354	coro_enq (pTHX_ SV *coro_sv)
		1355	{
		1356	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1357	}
		1358
		1359	static SV *
		1360	coro_deq (pTHX)
887	{	1361	{
888	int prio;	1362	int prio;
889		1363
890	if (SvTYPE (sv) != SVt_PVHV)
891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893	{
894	SV *coro = sv;
895	SV_CORO (coro, "omg");
896	prio = SvSTATE (coro)->prio;
897	}
898
899	av_push (coro_ready [prio - PRIO_MIN], sv);
900	coro_nready++;
901	}
902
903	static SV *
904	coro_deq (pTHX_ int min_prio)
905	{
906	int prio = PRIO_MAX - PRIO_MIN;
907
908	min_prio -= PRIO_MIN;
909	if (min_prio < 0)
910	min_prio = 0;
911
912	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1364	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
913	if (AvFILLp (coro_ready [prio]) >= 0)	1365	if (AvFILLp (coro_ready [prio]) >= 0)
914	{
915	coro_nready--;
916	return av_shift (coro_ready [prio]);	1366	return av_shift (coro_ready [prio]);
917	}
918		1367
919	return 0;	1368	return 0;
920	}	1369	}
921		1370
		1371	static int
		1372	api_ready (SV *coro_sv)
		1373	{
		1374	dTHX;
		1375	struct coro *coro;
		1376
		1377	if (SvROK (coro_sv))
		1378	coro_sv = SvRV (coro_sv);
		1379
		1380	coro = SvSTATE (coro_sv);
		1381
		1382	if (coro->flags & CF_READY)
		1383	return 0;
		1384
		1385	coro->flags |= CF_READY;
		1386
		1387	LOCK;
		1388	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1389	++coro_nready;
		1390	UNLOCK;
		1391
		1392	return 1;
		1393	}
		1394
		1395	static int
		1396	api_is_ready (SV *coro_sv)
		1397	{
		1398	dTHX;
		1399	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1400	}
		1401
922	static void	1402	static void
923	api_ready (SV *coro)	1403	prepare_schedule (pTHX_ struct transfer_args *ta)
924	{	1404	{
925	dTHX;	1405	SV *prev_sv, *next_sv;
926		1406
927	if (SvROK (coro))	1407	for (;;)
928	coro = SvRV (coro);	1408	{
		1409	LOCK;
		1410	next_sv = coro_deq (aTHX);
		1411
		1412	/* nothing to schedule: call the idle handler */
		1413	if (expect_false (!next_sv))
		1414	{
		1415	dSP;
		1416	UNLOCK;
		1417
		1418	ENTER;
		1419	SAVETMPS;
		1420
		1421	PUSHMARK (SP);
		1422	PUTBACK;
		1423	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1424	SPAGAIN;
		1425
		1426	FREETMPS;
		1427	LEAVE;
		1428	continue;
		1429	}
		1430
		1431	ta->next = SvSTATE (next_sv);
		1432
		1433	/* cannot transfer to destroyed coros, skip and look for next */
		1434	if (expect_false (ta->next->flags & CF_DESTROYED))
		1435	{
		1436	UNLOCK;
		1437	SvREFCNT_dec (next_sv);
		1438	/* coro_nready is already taken care of by destroy */
		1439	continue;
		1440	}
		1441
		1442	--coro_nready;
		1443	UNLOCK;
		1444	break;
		1445	}
		1446
		1447	/* free this only after the transfer */
		1448	prev_sv = SvRV (coro_current);
		1449	ta->prev = SvSTATE (prev_sv);
		1450	TRANSFER_CHECK (*ta);
		1451	assert (ta->next->flags & CF_READY);
		1452	ta->next->flags &= ~CF_READY;
		1453	SvRV_set (coro_current, next_sv);
929		1454
930	LOCK;	1455	LOCK;
931	coro_enq (aTHX_ SvREFCNT_inc (coro));	1456	free_coro_mortal (aTHX);
		1457	coro_mortal = prev_sv;
932	UNLOCK;	1458	UNLOCK;
		1459	}
		1460
		1461	static void
		1462	prepare_cede (pTHX_ struct transfer_args *ta)
		1463	{
		1464	api_ready (coro_current);
		1465	prepare_schedule (aTHX_ ta);
		1466	}
		1467
		1468	static int
		1469	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1470	{
		1471	if (coro_nready)
		1472	{
		1473	SV *prev = SvRV (coro_current);
		1474	prepare_schedule (aTHX_ ta);
		1475	api_ready (prev);
		1476	return 1;
		1477	}
		1478	else
		1479	return 0;
933	}	1480	}
934		1481
935	static void	1482	static void
936	api_schedule (void)	1483	api_schedule (void)
937	{	1484	{
938	dTHX;	1485	dTHX;
		1486	struct transfer_args ta;
939		1487
940	SV *prev, *next;	1488	prepare_schedule (aTHX_ &ta);
		1489	TRANSFER (ta, 1);
		1490	}
941		1491
942	LOCK;	1492	static int
		1493	api_cede (void)
		1494	{
		1495	dTHX;
		1496	struct transfer_args ta;
943		1497
944	prev = SvRV (GvSV (coro_current));	1498	prepare_cede (aTHX_ &ta);
945	next = coro_deq (aTHX_ PRIO_MIN);
946		1499
947	if (!next)	1500	if (expect_true (ta.prev != ta.next))
948	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1501	{
		1502	TRANSFER (ta, 1);
		1503	return 1;
		1504	}
		1505	else
		1506	return 0;
		1507	}
949		1508
950	/* free this only after the transfer */	1509	static int
951	coro_mortal = prev;	1510	api_cede_notself (void)
952	SV_CORO (prev, "Coro::schedule");	1511	{
		1512	dTHX;
		1513	struct transfer_args ta;
953		1514
954	SvRV (GvSV (coro_current)) = next;	1515	if (prepare_cede_notself (aTHX_ &ta))
955		1516	{
956	SV_CORO (next, "Coro::schedule");	1517	TRANSFER (ta, 1);
957		1518	return 1;
958	UNLOCK;	1519	}
959		1520	else
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1521	return 0;
961	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962	}	1522	}
963		1523
964	static void	1524	static void
965	api_cede (void)	1525	api_trace (SV *coro_sv, int flags)
966	{	1526	{
967	dTHX;	1527	dTHX;
		1528	struct coro *coro = SvSTATE (coro_sv);
968		1529
969	LOCK;	1530	if (flags & CC_TRACE)
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1531	{
971	UNLOCK;	1532	if (!coro->cctx)
		1533	coro->cctx = cctx_new ();
		1534	else if (!(coro->cctx->flags & CC_TRACE))
		1535	croak ("cannot enable tracing on coroutine with custom stack");
972		1536
973	api_schedule ();	1537	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
974	}	1538	}
		1539	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1540	{
		1541	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
975		1542
		1543	if (coro->flags & CF_RUNNING)
		1544	PL_runops = RUNOPS_DEFAULT;
		1545	else
		1546	coro->slot->runops = RUNOPS_DEFAULT;
		1547	}
		1548	}
		1549
976	MODULE = Coro::State PACKAGE = Coro::State	1550	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977		1551
978	PROTOTYPES: DISABLE	1552	PROTOTYPES: DISABLE
979		1553
980	BOOT:	1554	BOOT:
981	{ /* {} necessary for stoopid perl-5.6.x */	1555	{
982	#ifdef USE_ITHREADS	1556	#ifdef USE_ITHREADS
983	MUTEX_INIT (&coro_mutex);	1557	MUTEX_INIT (&coro_mutex);
984	#endif	1558	#endif
985	BOOT_PAGESIZE;	1559	BOOT_PAGESIZE;
986		1560
987	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1561	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
988	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1562	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1563
		1564	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1565	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1566	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1567	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1568
		1569	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1570	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1571	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1572
989	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1573	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990		1574
991	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1577	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1578	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995		1579
996	main_mainstack = PL_mainstack;	1580	main_mainstack = PL_mainstack;
		1581	main_top_env = PL_top_env;
		1582
		1583	while (main_top_env->je_prev)
		1584	main_top_env = main_top_env->je_prev;
997		1585
998	coroapi.ver = CORO_API_VERSION;	1586	coroapi.ver = CORO_API_VERSION;
		1587	coroapi.rev = CORO_API_REVISION;
999	coroapi.transfer = api_transfer;	1588	coroapi.transfer = api_transfer;
1000		1589
1001	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1590	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1002	}	1591	}
1003		1592
1004	SV *	1593	SV *
1005	new (char *klass, ...)	1594	new (char *klass, ...)
1006	CODE:	1595	CODE:
1007	{	1596	{
1008	struct coro *coro;	1597	struct coro *coro;
		1598	MAGIC *mg;
1009	HV *hv;	1599	HV *hv;
1010	int i;	1600	int i;
1011		1601
1012	Newz (0, coro, 1, struct coro);	1602	Newz (0, coro, 1, struct coro);
1013	coro->args = newAV ();	1603	coro->args = newAV ();
		1604	coro->flags = CF_NEW;
1014		1605
		1606	if (coro_first) coro_first->prev = coro;
		1607	coro->next = coro_first;
		1608	coro_first = coro;
		1609
		1610	coro->hv = hv = newHV ();
		1611	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1612	mg->mg_flags |= MGf_DUP;
		1613	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1614
		1615	av_extend (coro->args, items - 1);
1015	for (i = 1; i < items; i++)	1616	for (i = 1; i < items; i++)
1016	av_push (coro->args, newSVsv (ST (i)));	1617	av_push (coro->args, newSVsv (ST (i)));
1017
1018	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1019	/*coro->stack = 0;*/
1020
1021	hv = newHV ();
1022	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1023	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1024	}	1618	}
1025	OUTPUT:	1619	OUTPUT:
1026	RETVAL	1620	RETVAL
1027		1621
		1622	# these not obviously related functions are all rolled into the same xs
		1623	# function to increase chances that they all will call transfer with the same
		1624	# stack offset
1028	void	1625	void
1029	transfer(prev, next, flags)	1626	_set_stacklevel (...)
1030	SV *prev	1627	ALIAS:
1031	SV *next	1628	Coro::State::transfer = 1
1032	int flags	1629	Coro::schedule = 2
		1630	Coro::cede = 3
		1631	Coro::cede_notself = 4
1033	CODE:	1632	CODE:
		1633	{
		1634	struct transfer_args ta;
		1635
1034	PUTBACK;	1636	PUTBACK;
1035	SV_CORO (next, "Coro::transfer");	1637	switch (ix)
1036	SV_CORO (prev, "Coro::transfer");	1638	{
1037	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1639	case 0:
		1640	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1641	ta.next = 0;
		1642	break;
		1643
		1644	case 1:
		1645	if (items != 2)
		1646	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1647
		1648	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1649	break;
		1650
		1651	case 2:
		1652	prepare_schedule (aTHX_ &ta);
		1653	break;
		1654
		1655	case 3:
		1656	prepare_cede (aTHX_ &ta);
		1657	break;
		1658
		1659	case 4:
		1660	if (!prepare_cede_notself (aTHX_ &ta))
		1661	XSRETURN_EMPTY;
		1662
		1663	break;
		1664	}
1038	SPAGAIN;	1665	SPAGAIN;
1039		1666
1040	int	1667	BARRIER;
1041	prio (Coro::State coro, int newprio = 0)	1668	PUTBACK;
1042	ALIAS:	1669	TRANSFER (ta, 0);
1043	nice = 1	1670	SPAGAIN; /* might be the sp of a different coroutine now */
1044	CODE:	1671	/* be extra careful not to ever do anything after TRANSFER */
1045	{
1046	RETVAL = coro->prio;
1047
1048	if (items > 1)
1049	{
1050	if (ix)
1051	newprio += coro->prio;
1052
1053	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1054	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1055
1056	coro->prio = newprio;
1057	}
1058	}	1672	}
1059		1673
1060	void	1674	bool
1061	_clone_state_from (SV *dst, SV *src)	1675	_destroy (SV *coro_sv)
1062	CODE:	1676	CODE:
1063	{	1677	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1064	struct coro *coro_src = SvSTATE (src);	1678	OUTPUT:
1065		1679	RETVAL
1066	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068	++coro_src->refcnt;
1069	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070	}
1071		1680
1072	void	1681	void
1073	_exit (code)	1682	_exit (code)
1074	int code	1683	int code
1075	PROTOTYPE: $	1684	PROTOTYPE: $
1076	CODE:	1685	CODE:
1077	_exit (code);	1686	_exit (code);
1078		1687
1079	MODULE = Coro::State PACKAGE = Coro::Cont	1688	int
		1689	cctx_stacksize (int new_stacksize = 0)
		1690	CODE:
		1691	RETVAL = coro_stacksize;
		1692	if (new_stacksize)
		1693	coro_stacksize = new_stacksize;
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	int
		1698	cctx_count ()
		1699	CODE:
		1700	RETVAL = cctx_count;
		1701	OUTPUT:
		1702	RETVAL
		1703
		1704	int
		1705	cctx_idle ()
		1706	CODE:
		1707	RETVAL = cctx_idle;
		1708	OUTPUT:
		1709	RETVAL
1080		1710
1081	void	1711	void
1082	yield (...)	1712	list ()
1083	PROTOTYPE: @	1713	PPCODE:
		1714	{
		1715	struct coro *coro;
		1716	for (coro = coro_first; coro; coro = coro->next)
		1717	if (coro->hv)
		1718	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1719	}
		1720
		1721	void
		1722	call (Coro::State coro, SV *coderef)
		1723	ALIAS:
		1724	eval = 1
		1725	CODE:
		1726	{
		1727	if (coro->mainstack)
		1728	{
		1729	struct coro temp;
		1730
		1731	if (!(coro->flags & CF_RUNNING))
		1732	{
		1733	PUTBACK;
		1734	save_perl (aTHX_ &temp);
		1735	load_perl (aTHX_ coro);
		1736	}
		1737
		1738	{
		1739	dSP;
		1740	ENTER;
		1741	SAVETMPS;
		1742	PUTBACK;
		1743	PUSHSTACK;
		1744	PUSHMARK (SP);
		1745
		1746	if (ix)
		1747	eval_sv (coderef, 0);
		1748	else
		1749	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1750
		1751	POPSTACK;
		1752	SPAGAIN;
		1753	FREETMPS;
		1754	LEAVE;
		1755	PUTBACK;
		1756	}
		1757
		1758	if (!(coro->flags & CF_RUNNING))
		1759	{
		1760	save_perl (aTHX_ coro);
		1761	load_perl (aTHX_ &temp);
		1762	SPAGAIN;
		1763	}
		1764	}
		1765	}
		1766
		1767	SV *
		1768	is_ready (Coro::State coro)
		1769	PROTOTYPE: $
		1770	ALIAS:
		1771	is_ready = CF_READY
		1772	is_running = CF_RUNNING
		1773	is_new = CF_NEW
		1774	is_destroyed = CF_DESTROYED
		1775	CODE:
		1776	RETVAL = boolSV (coro->flags & ix);
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	void
		1781	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1782
		1783	SV *
		1784	has_stack (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = boolSV (!!coro->cctx);
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	int
		1792	is_traced (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	IV
		1800	rss (Coro::State coro)
		1801	PROTOTYPE: $
		1802	ALIAS:
		1803	usecount = 1
1084	CODE:	1804	CODE:
1085	SV *yieldstack;	1805	switch (ix)
1086	SV *sv;	1806	{
1087	AV *defav = GvAV (PL_defgv);	1807	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1088	struct coro *prev, *next;	1808	case 1: RETVAL = coro->usecount; break;
1089
1090	yieldstack = *hv_fetch (
1091	(HV *)SvRV (GvSV (coro_current)),
1092	"yieldstack", sizeof ("yieldstack") - 1,
1093	0	1809	}
1094	);	1810	OUTPUT:
		1811	RETVAL
1095		1812
1096	/* set up @_ -- ugly */	1813	void
1097	av_clear (defav);	1814	force_cctx ()
1098	av_fill (defav, items - 1);	1815	CODE:
1099	while (items--)	1816	struct coro *coro = SvSTATE (coro_current);
1100	av_store (defav, items, SvREFCNT_inc (ST(items)));	1817	coro->cctx->idle_sp = 0;
1101
1102	sv = av_pop ((AV *)SvRV (yieldstack));
1103	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105	SvREFCNT_dec (sv);
1106
1107	coro_state_transfer (aTHX_ prev, next, 0);
1108		1818
1109	MODULE = Coro::State PACKAGE = Coro	1819	MODULE = Coro::State PACKAGE = Coro
1110		1820
1111	BOOT:	1821	BOOT:
1112	{	1822	{
1113	int i;	1823	int i;
		1824
		1825	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1826	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1827	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1828
		1829	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1830	SvREADONLY_on (coro_current);
		1831
1114	HV *stash = gv_stashpv ("Coro", TRUE);	1832	coro_stash = gv_stashpv ("Coro", TRUE);
1115		1833
1116	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1834	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1835	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1836	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1837	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1838	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1839	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125		1840
1126	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1841	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127	coro_ready[i] = newAV ();	1842	coro_ready[i] = newAV ();
1128		1843
1129	{	1844	{
1130	SV *sv = perl_get_sv("Coro::API", 1);	1845	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1846	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1131		1847
1132	coroapi.schedule = api_schedule;	1848	coroapi.schedule = api_schedule;
1133	coroapi.cede = api_cede;	1849	coroapi.cede = api_cede;
		1850	coroapi.cede_notself = api_cede_notself;
1134	coroapi.ready = api_ready;	1851	coroapi.ready = api_ready;
		1852	coroapi.is_ready = api_is_ready;
1135	coroapi.nready = &coro_nready;	1853	coroapi.nready = &coro_nready;
1136	coroapi.current = coro_current;	1854	coroapi.current = coro_current;
1137		1855
1138	GCoroAPI = &coroapi;	1856	GCoroAPI = &coroapi;
1139	sv_setiv (sv, (IV)&coroapi);	1857	sv_setiv (sv, (IV)&coroapi);
1140	SvREADONLY_on (sv);	1858	SvREADONLY_on (sv);
1141	}	1859	}
1142	}	1860	}
1143		1861
1144	#if !PERL_MICRO
1145
1146	void	1862	void
1147	ready (self)	1863	_set_current (SV *current)
1148	SV * self
1149	PROTOTYPE: $	1864	PROTOTYPE: $
1150	CODE:	1865	CODE:
1151	api_ready (self);	1866	SvREFCNT_dec (SvRV (coro_current));
		1867	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1152		1868
1153	#endif	1869	int
		1870	prio (Coro::State coro, int newprio = 0)
		1871	ALIAS:
		1872	nice = 1
		1873	CODE:
		1874	{
		1875	RETVAL = coro->prio;
		1876
		1877	if (items > 1)
		1878	{
		1879	if (ix)
		1880	newprio = coro->prio - newprio;
		1881
		1882	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1883	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1884
		1885	coro->prio = newprio;
		1886	}
		1887	}
		1888	OUTPUT:
		1889	RETVAL
		1890
		1891	SV *
		1892	ready (SV *self)
		1893	PROTOTYPE: $
		1894	CODE:
		1895	RETVAL = boolSV (api_ready (self));
		1896	OUTPUT:
		1897	RETVAL
1154		1898
1155	int	1899	int
1156	nready (...)	1900	nready (...)
1157	PROTOTYPE:	1901	PROTOTYPE:
1158	CODE:	1902	CODE:
1159	RETVAL = coro_nready;	1903	RETVAL = coro_nready;
1160	OUTPUT:	1904	OUTPUT:
1161	RETVAL	1905	RETVAL
1162		1906
1163	void	1907	void
1164	schedule (...)	1908	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1909	PROTOTYPE: $;$
		1910	CODE:
		1911	SvREFCNT_dec (self->throw);
		1912	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1913
		1914	void
		1915	swap_defsv (Coro::State self)
1165	PROTOTYPE:	1916	PROTOTYPE: $
		1917	ALIAS:
		1918	swap_defav = 1
		1919	CODE:
		1920	if (!self->slot)
		1921	croak ("cannot swap state with coroutine that has no saved state");
		1922	else
		1923	{
		1924	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1925	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1926
		1927	SV *tmp = *src; *src = *dst; *dst = tmp;
		1928	}
		1929
		1930	# for async_pool speedup
		1931	void
		1932	_pool_1 (SV *cb)
1166	CODE:	1933	CODE:
1167	api_schedule ();	1934	{
		1935	struct coro *coro = SvSTATE (coro_current);
		1936	HV *hv = (HV *)SvRV (coro_current);
		1937	AV *defav = GvAV (PL_defgv);
		1938	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1939	AV *invoke_av;
		1940	int i, len;
		1941
		1942	if (!invoke)
		1943	{
		1944	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1945	croak ("\3async_pool terminate\2\n");
		1946	}
		1947
		1948	SvREFCNT_dec (coro->saved_deffh);
		1949	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1950
		1951	hv_store (hv, "desc", sizeof ("desc") - 1,
		1952	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1953
		1954	invoke_av = (AV *)SvRV (invoke);
		1955	len = av_len (invoke_av);
		1956
		1957	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1958
		1959	if (len > 0)
		1960	{
		1961	av_fill (defav, len - 1);
		1962	for (i = 0; i < len; ++i)
		1963	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1964	}
		1965
		1966	SvREFCNT_dec (invoke);
		1967	}
1168		1968
1169	void	1969	void
1170	cede (...)	1970	_pool_2 (SV *cb)
1171	PROTOTYPE:
1172	CODE:	1971	CODE:
1173	api_cede ();	1972	{
		1973	struct coro *coro = SvSTATE (coro_current);
1174		1974
1175	# and these are hacks	1975	sv_setsv (cb, &PL_sv_undef);
		1976
		1977	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1978	coro->saved_deffh = 0;
		1979
		1980	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1981	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1982	{
		1983	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1984	croak ("\3async_pool terminate\2\n");
		1985	}
		1986
		1987	av_clear (GvAV (PL_defgv));
		1988	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1989	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1990
		1991	coro->prio = 0;
		1992
		1993	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1994	api_trace (coro_current, 0);
		1995
		1996	av_push (av_async_pool, newSVsv (coro_current));
		1997	}
		1998
		1999
		2000	MODULE = Coro::State PACKAGE = Coro::AIO
		2001
1176	SV *	2002	SV *
1177	_aio_get_state ()	2003	_get_state ()
1178	CODE:	2004	CODE:
1179	{	2005	{
1180	struct {	2006	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		2007
		2008	RETVAL = newSV (sizeof (struct io_state));
		2009	data = (struct io_state *)SvPVX (RETVAL);
		2010	SvCUR_set (RETVAL, sizeof (struct io_state));
		2011	SvPOK_only (RETVAL);
		2012
1187	data.errorno = errno;	2013	data->errorno = errno;
1188	data.laststype = PL_laststype;	2014	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	2015	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	2016	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	2017	}
1194	OUTPUT:	2018	OUTPUT:
1195	RETVAL	2019	RETVAL
1196		2020
1197	void	2021	void
1198	_aio_set_state (char *data_)	2022	_set_state (char *data_)
1199	PROTOTYPE: $	2023	PROTOTYPE: $
1200	CODE:	2024	CODE:
1201	{	2025	{
1202	struct {	2026	struct io_state *data = (void *)data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} *data = (void *)data_;
1208		2027
1209	errno = data->errorno;	2028	errno = data->errorno;
1210	PL_laststype = data->laststype;	2029	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	2030	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	2031	PL_statcache = data->statcache;
1213	}	2032	}
		2033

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