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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.91 by root, Sat Nov 25 01:14:11 2006 UTC vs.
Revision 1.234 by root, Fri May 9 22:29:05 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
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
		24
		25	#ifdef HAVE_MMAP
		26	# include <unistd.h>
		27	# include <sys/mman.h>
		28	# ifndef MAP_ANONYMOUS
		29	# ifdef MAP_ANON
		30	# define MAP_ANONYMOUS MAP_ANON
		31	# else
		32	# undef HAVE_MMAP
		33	# endif
		34	# endif
		35	# include <limits.h>
		36	# ifndef PAGESIZE
		37	# define PAGESIZE pagesize
		38	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		39	static long pagesize;
		40	# else
		41	# define BOOT_PAGESIZE (void)0
		42	# endif
		43	#else
		44	# define PAGESIZE 0
		45	# define BOOT_PAGESIZE (void)0
		46	#endif
		47
		48	#if CORO_USE_VALGRIND
		49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	\|\| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	65	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	66	# define PL_ppaddr ppaddr
14	# endif	67	# endif
15	# ifndef call_sv	68	# ifndef call_sv
16	# define call_sv perl_call_sv	69	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
29	# endif	82	# endif
30	#endif	83	#endif
31		84
32	#include <errno.h>	85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
		98	/* 5.8.7 */
		99	#ifndef SvRV_set
		100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
33		102
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	104	# 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	105	#endif
52	# include <limits.h>	106
53	# ifndef PAGESIZE	107	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	108	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	109	#endif
60	#endif
61		110
62	#define SUB_INIT "Coro::State::initialize"	111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
63		115
64	/* The next macro should declare a variable stacklevel that contains and approximation	116	/* 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	117	* portable way as possible. */
66	* and should be unique. */	118	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	119	#define STACKLEVEL ((void *)&stacklevel)
68		120
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		122
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	123	#if __GNUC__ >= 3
		124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
		131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
		135
		136	#define NOINLINE attribute ((noinline))
72		137
73	#include "CoroAPI.h"	138	#include "CoroAPI.h"
74		139
75	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
…		…
79	#else	144	#else
80	# define LOCK (void)0	145	# define LOCK (void)0
81	# define UNLOCK (void)0	146	# define UNLOCK (void)0
82	#endif	147	#endif
83		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
85	static AV main_mainstack; / used to differentiate between $main and others */	160	static AV main_mainstack; / used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
86	static HV coro_state_stash, coro_stash;	162	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	163	static volatile SV coro_mortal; / will be freed after next transfer */
88		164
89	/* this is actually not just the c stack but also c registers etc... */	165	static GV irsgv; / $/ */
		166	static GV stdoutgv; / STDOUT /
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV hv_sig; / %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	/* Coro::AnyEvent */
		177	static SV *sv_activity;
		178
		179	static struct coro_cctx *cctx_first;
		180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		189	};
		190
		191	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	192	typedef struct coro_cctx {
91	struct coro_stack *next;	193	struct coro_cctx *next;
92		194
93	void *idle_sp;	195	/* the stack */
94	void *sptr;	196	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	197	size_t ssize;
96		198
97	/* cpu state */	199	/* cpu state */
		200	void idle_sp; / sp of top-level transfer/schedule/cede call */
		201	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		202	JMPENV *top_env;
98	coro_context cctx;	203	coro_context cctx;
99	} coro_stack;
100		204
101	static coro_stack *main_stack;	205	#if CORO_USE_VALGRIND
		206	int valgrind_id;
		207	#endif
		208	unsigned char flags;
		209	} coro_cctx;
102		210
		211	enum {
		212	CF_RUNNING = 0x0001, /* coroutine is running */
		213	CF_READY = 0x0002, /* coroutine is ready */
		214	CF_NEW = 0x0004, /* has never been switched to */
		215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		216	};
		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		219	typedef struct {
		220	SV *defsv;
		221	AV *defav;
		222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
		228
		229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		230
		231	/* this is a structure representing a perl-level coroutine */
103	struct coro {	232	struct coro {
104	/* optionally saved, might be zero */	233	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	234	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		235
113	/* the c stack, if any */	236	/* process data */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;	237	AV *mainstack;
120	SV **stack_sp;	238	perl_slots slot; / basically the saved sp */
121	OP *op;	239
122	SV **curpad;	240	AV args; / data associated with this coroutine (initial args) */
123	AV *comppad;	241	int refcnt; /* coroutines are refcounted, yes */
124	CV *compcv;	242	int flags; /* CF_ flags */
125	SV **stack_base;	243	HV hv; / the perl hash associated with this coro, if any */
126	SV **stack_max;	244
127	SV **tmps_stack;	245	/* statistics */
128	I32 tmps_floor;	246	int usecount; /* number of transfers to this coro */
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		247
147	/* coro process data */	248	/* coro process data */
148	int prio;	249	int prio;
		250	SV throw; / exception to be thrown */
149		251
150	/* data associated with this coroutine (initial args) */	252	/* async_pool */
151	AV *args;	253	SV *saved_deffh;
152	int refcnt;	254
		255	/* linked list */
		256	struct coro next, prev;
153	};	257	};
154		258
155	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
157		261
		262	/ Coro ******************************************************************/
		263
		264	#define PRIO_MAX 3
		265	#define PRIO_HIGH 1
		266	#define PRIO_NORMAL 0
		267	#define PRIO_LOW -1
		268	#define PRIO_IDLE -3
		269	#define PRIO_MIN -4
		270
		271	/* for Coro.pm */
		272	static SV *coro_current;
		273	static SV *coro_readyhook;
		274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		275	static int coro_nready;
		276	static struct coro *coro_first;
		277
		278	/ lowlevel stuff ********************************************************/
		279
		280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
		282	{
		283	#if PERL_VERSION_ATLEAST (5,10,0)
		284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		285	get_sv (name, create);
		286	#endif
		287	return get_sv (name, create);
		288	}
		289
		290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
158	static AV *	310	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
160	{	312	{
161	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	314	AV newpadlist, newpad;
163		315
164	newpadlist = newAV ();	316	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	318	#if PERL_VERSION_ATLEAST (5,10,0)
		319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		320	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	322	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	324	--AvFILLp (padlist);
173		325
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
209		361
210	/* casting is fun. */	362	/* casting is fun. */
211	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	363	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
212	free_padlist (aTHX_ padlist);	364	free_padlist (aTHX_ padlist);
213		365
214	SvREFCNT_dec (av);
215
216	return 0;	366	return 0;
217	}	367	}
218		368
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	369	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		370	#define CORO_MAGIC_type_state PERL_MAGIC_ext
220		371
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	372	static MGVTBL coro_cv_vtbl = {
		373	0, 0, 0, 0,
		374	coro_cv_free
		375	};
		376
		377	#define CORO_MAGIC(sv,type) \
		378	SvMAGIC (sv) \
		379	? SvMAGIC (sv)->mg_type == type \
		380	? SvMAGIC (sv) \
		381	: mg_find (sv, type) \
		382	: 0
		383
		384	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		385	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		386
		387	static struct coro *
		388	SvSTATE_ (pTHX_ SV *coro)
		389	{
		390	HV *stash;
		391	MAGIC *mg;
		392
		393	if (SvROK (coro))
		394	coro = SvRV (coro);
		395
		396	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		397	croak ("Coro::State object required");
		398
		399	stash = SvSTASH (coro);
		400	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		401	{
		402	/* very slow, but rare, check */
		403	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		404	croak ("Coro::State object required");
		405	}
		406
		407	mg = CORO_MAGIC_state (coro);
		408	return (struct coro *)mg->mg_ptr;
		409	}
		410
		411	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222		412
223	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
224	static void	414	static void
225	get_padlist (pTHX_ CV *cv)	415	get_padlist (pTHX_ CV *cv)
226	{	416	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
		418	AV *av;
228		419
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	422	else
232	{	423	{
233	#if 0	424	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	425	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	426	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	427	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	428	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	429	SvREFCNT_dec (cp);
239	#else	430	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	434	}
244		435
245	static void	436	static void
246	put_padlist (pTHX_ CV *cv)	437	put_padlist (pTHX_ CV *cv)
247	{	438	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
		440	AV *av;
249		441
250	if (!mg)	442	if (expect_false (!mg))
251	{	443	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();
256	}
257		444
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	445	av = (AV *)mg->mg_obj;
259	}
260		446
261	#define SB do {	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	448	av_extend (av, AvMAX (av) + 1);
263		449
264	#define LOAD(state) load_state(aTHX_ (state));	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	451	}
266		452
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	453	/ load & save, init *****************************************************/
268		454
269	static void	455	static void
270	load_state(pTHX_ Coro__State c)	456	load_perl (pTHX_ Coro__State c)
271	{	457	{
272	PL_dowarn = c->dowarn;	458	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	459	c->slot = 0;
274		460
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	461	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
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		462
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	463	GvSV (PL_defgv) = slot->defsv;
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	464	GvAV (PL_defgv) = slot->defav;
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	465	GvSV (PL_errgv) = slot->errsv;
		466	GvSV (irsgv) = slot->irsgv;
		467
		468	#define VAR(name,type) PL_ ## name = slot->name;
		469	# include "state.h"
		470	#undef VAR
310		471
311	{	472	{
312	dSP;	473	dSP;
		474
313	CV *cv;	475	CV *cv;
314		476
315	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
317	{	479	{
318	AV padlist = (AV )POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	481	CvDEPTH (cv) = PTR2IV (POPs);
324	}	482	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	483	}
328		484
329	PUTBACK;	485	PUTBACK;
330	}	486	}
331	}	487	}
332		488
333	static void	489	static void
334	save_state(pTHX_ Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
335	{	491	{
336	{	492	{
337	dSP;	493	dSP;
338	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	498	/*
343	* the worst thing you can imagine happens first - we have to save	499	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
345	*/	501	*/
346		502
347	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
349	for (;;)	505	for (;;)
350	{	506	{
351	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
352	{	508	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
354		510
355	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
356	{	512	{
357	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
		514
358	if (CvDEPTH(cv))	515	if (expect_true (CvDEPTH (cv)))
359	{	516	{
360	EXTEND (SP, CvDEPTH(cv)*2);	517	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));	518	PUSHs ((SV *)CvPADLIST (cv));
		519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
371		521
		522	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	523	get_padlist (aTHX_ cv);
373	}	524	}
374	}	525	}
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	}	526	}
384		527
385	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
386	break;	529	break;
387		530
388	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
391	}	534	}
392		535
393	PUTBACK;	536	PUTBACK;
394	}	537	}
395		538
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	541	if (SLOT_COUNT >= 1) CXINC;
		542	if (SLOT_COUNT >= 2) CXINC;
		543	if (SLOT_COUNT >= 3) CXINC;
		544	{
		545	int i;
		546	for (i = 3; i < SLOT_COUNT; ++i)
		547	CXINC;
		548	}
		549	cxstack_ix -= SLOT_COUNT; /* undo allocation */
399		550
400	c->dowarn = PL_dowarn;
401	c->in_eval = PL_in_eval;
402
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;	551	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;	552
407	c->op = PL_op;	553	{
408	c->curpad = PL_curpad;	554	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
409	c->comppad = PL_comppad;	555
410	c->compcv = PL_compcv;	556	slot->defav = GvAV (PL_defgv);
411	c->stack_base = PL_stack_base;	557	slot->defsv = DEFSV;
412	c->stack_max = PL_stack_max;	558	slot->errsv = ERRSV;
413	c->tmps_stack = PL_tmps_stack;	559	slot->irsgv = GvSV (irsgv);
414	c->tmps_floor = PL_tmps_floor;	560
415	c->tmps_ix = PL_tmps_ix;	561	#define VAR(name,type) slot->name = PL_ ## name;
416	c->tmps_max = PL_tmps_max;	562	# include "state.h"
417	c->markstack = PL_markstack;	563	#undef VAR
418	c->markstack_ptr = PL_markstack_ptr;	564	}
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	}	565	}
435		566
436	/*	567	/*
437	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	570	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	571	* not usually need a lot of stackspace.
441	*/	572	*/
		573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
442	static void	576	static void
443	coro_init_stacks (pTHX)	577	coro_init_stacks (pTHX)
444	{	578	{
445	LOCK;	579	PL_curstackinfo = new_stackinfo(32, 8);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		583
452	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		587
456	New(50,PL_tmps_stack,96,SV*);	588	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	591	PL_tmps_max = 32;
460		592
461	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
464		596
465	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
467	#endif	599	#endif
468		600
469	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
472		604
473	New(54,PL_savestack,96,ANY);	605	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	607	PL_savestack_max = 24;
476		608
477	#if PERL_VERSION < 9	609	#if !PERL_VERSION_ATLEAST (5,10,0)
478	New(54,PL_retstack,8,OP*);	610	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	612	PL_retstack_max = 4;
481	#endif	613	#endif
482
483	UNLOCK;
484	}	614	}
		615	#endif
485		616
486	/*	617	/*
487	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
488	*/	619	*/
489	static void	620	static void
490	destroy_stacks(pTHX)	621	coro_destroy_stacks (pTHX)
491	{	622	{
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)	623	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
505		625
506	while (PL_curstackinfo)	626	while (PL_curstackinfo)
507	{	627	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
509		629
510	{ /D//remove/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	630	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/D//remove/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		632
522	Safefree (PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	634	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	635	PL_curstackinfo = p;
525	}	636	}
526		637
527	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	639	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	641	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	642	#if !PERL_VERSION_ATLEAST (5,10,0)
532	Safefree (PL_retstack);	643	Safefree (PL_retstack);
533	#endif	644	#endif
534	}	645	}
535		646
		647	static size_t
		648	coro_rss (pTHX_ struct coro *coro)
		649	{
		650	size_t rss = sizeof (*coro);
		651
		652	if (coro->mainstack)
		653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
		657	if (coro->flags & CF_RUNNING)
		658	{
		659	slot = &tmp_slot;
		660
		661	#define VAR(name,type) slot->name = PL_ ## name;
		662	# include "state.h"
		663	#undef VAR
		664	}
		665	else
		666	slot = coro->slot;
		667
		668	rss += sizeof (slot->curstackinfo);
		669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		671	rss += slot->tmps_max * sizeof (SV *);
		672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		673	rss += slot->scopestack_max * sizeof (I32);
		674	rss += slot->savestack_max * sizeof (ANY);
		675
		676	#if !PERL_VERSION_ATLEAST (5,10,0)
		677	rss += slot->retstack_max * sizeof (OP *);
		678	#endif
		679	}
		680
		681	return rss;
		682	}
		683
		684	/ coroutine stack handling **********************************************/
		685
		686	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		687	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		688
		689	/*
		690	* This overrides the default magic get method of %SIG elements.
		691	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		692	* and instead of tryign to save and restore the hash elements, we just provide
		693	* readback here.
		694	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		695	* not expecting this to actually change the hook. This is a potential problem
		696	* when a schedule happens then, but we ignore this.
		697	*/
		698	static int
		699	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		700	{
		701	const char *s = MgPV_nolen_const (mg);
		702
		703	if (*s == '_')
		704	{
		705	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		706	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		707	}
		708
		709	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		710	}
		711
		712	static int
		713	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		714	{
		715	const char *s = MgPV_nolen_const (mg);
		716
		717	if (*s == '_')
		718	{
		719	SV **svp = 0;
		720
		721	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		722	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		723
		724	if (svp)
		725	{
		726	SV old = svp;
		727	*svp = newSVsv (sv);
		728	SvREFCNT_dec (old);
		729	return 0;
		730	}
		731	}
		732
		733	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		734	}
		735
536	static void	736	static void
537	setup_coro (struct coro *coro)	737	coro_setup (pTHX_ struct coro *coro)
538	{	738	{
539	/*	739	/*
540	* emulate part of the perl startup here.	740	* emulate part of the perl startup here.
541	*/	741	*/
542	dTHX;	742	coro_init_stacks (aTHX);
		743
		744	PL_runops = RUNOPS_DEFAULT;
		745	PL_curcop = &PL_compiling;
		746	PL_in_eval = EVAL_NULL;
		747	PL_comppad = 0;
		748	PL_curpm = 0;
		749	PL_curpad = 0;
		750	PL_localizing = 0;
		751	PL_dirty = 0;
		752	PL_restartop = 0;
		753	#if PERL_VERSION_ATLEAST (5,10,0)
		754	PL_parser = 0;
		755	#endif
		756
		757	/* recreate the die/warn hooks */
		758	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		759	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		760
		761	GvSV (PL_defgv) = newSV (0);
		762	GvAV (PL_defgv) = coro->args; coro->args = 0;
		763	GvSV (PL_errgv) = newSV (0);
		764	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		765	PL_rs = newSVsv (GvSV (irsgv));
		766	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		767
		768	{
		769	dSP;
		770	LOGOP myop;
		771
		772	Zero (&myop, 1, LOGOP);
		773	myop.op_next = Nullop;
		774	myop.op_flags = OPf_WANT_VOID;
		775
		776	PUSHMARK (SP);
		777	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		778	PUTBACK;
		779	PL_op = (OP *)&myop;
		780	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		781	SPAGAIN;
		782	}
		783
		784	/* this newly created coroutine might be run on an existing cctx which most
		785	* likely was suspended in set_stacklevel, called from entersub.
		786	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		787	* so we ENTER here for symmetry
		788	*/
		789	ENTER;
		790	}
		791
		792	static void
		793	coro_destroy (pTHX_ struct coro *coro)
		794	{
		795	if (!IN_DESTRUCT)
		796	{
		797	/* restore all saved variables and stuff */
		798	LEAVE_SCOPE (0);
		799	assert (PL_tmps_floor == -1);
		800
		801	/* free all temporaries */
		802	FREETMPS;
		803	assert (PL_tmps_ix == -1);
		804
		805	/* unwind all extra stacks */
		806	POPSTACK_TO (PL_mainstack);
		807
		808	/* unwind main stack */
		809	dounwind (-1);
		810	}
		811
		812	SvREFCNT_dec (GvSV (PL_defgv));
		813	SvREFCNT_dec (GvAV (PL_defgv));
		814	SvREFCNT_dec (GvSV (PL_errgv));
		815	SvREFCNT_dec (PL_defoutgv);
		816	SvREFCNT_dec (PL_rs);
		817	SvREFCNT_dec (GvSV (irsgv));
		818
		819	SvREFCNT_dec (PL_diehook);
		820	SvREFCNT_dec (PL_warnhook);
		821
		822	SvREFCNT_dec (coro->saved_deffh);
		823	SvREFCNT_dec (coro->throw);
		824
		825	coro_destroy_stacks (aTHX);
		826	}
		827
		828	static void
		829	free_coro_mortal (pTHX)
		830	{
		831	if (expect_true (coro_mortal))
		832	{
		833	SvREFCNT_dec (coro_mortal);
		834	coro_mortal = 0;
		835	}
		836	}
		837
		838	static int
		839	runops_trace (pTHX)
		840	{
		841	COP *oldcop = 0;
		842	int oldcxix = -2;
		843	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		844	coro_cctx *cctx = coro->cctx;
		845
		846	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		847	{
		848	PERL_ASYNC_CHECK ();
		849
		850	if (cctx->flags & CC_TRACE_ALL)
		851	{
		852	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		853	{
		854	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		855	SV bot, top;
		856	AV av = newAV (); / return values */
		857	SV **cb;
		858	dSP;
		859
		860	GV *gv = CvGV (cx->blk_sub.cv);
		861	SV *fullname = sv_2mortal (newSV (0));
		862	if (isGV (gv))
		863	gv_efullname3 (fullname, gv, 0);
		864
		865	bot = PL_stack_base + cx->blk_oldsp + 1;
		866	top = cx->blk_gimme == G_ARRAY ? SP + 1
		867	: cx->blk_gimme == G_SCALAR ? bot + 1
		868	: bot;
		869
		870	av_extend (av, top - bot);
		871	while (bot < top)
		872	av_push (av, SvREFCNT_inc (*bot++));
		873
		874	PL_runops = RUNOPS_DEFAULT;
		875	ENTER;
		876	SAVETMPS;
		877	EXTEND (SP, 3);
		878	PUSHMARK (SP);
		879	PUSHs (&PL_sv_no);
		880	PUSHs (fullname);
		881	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		882	PUTBACK;
		883	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		884	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		885	SPAGAIN;
		886	FREETMPS;
		887	LEAVE;
		888	PL_runops = runops_trace;
		889	}
		890
		891	if (oldcop != PL_curcop)
		892	{
		893	oldcop = PL_curcop;
		894
		895	if (PL_curcop != &PL_compiling)
		896	{
		897	SV **cb;
		898
		899	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		900	{
		901	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		902
		903	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		904	{
		905	runops_proc_t old_runops = PL_runops;
		906	dSP;
		907	GV *gv = CvGV (cx->blk_sub.cv);
		908	SV *fullname = sv_2mortal (newSV (0));
		909
		910	if (isGV (gv))
		911	gv_efullname3 (fullname, gv, 0);
		912
		913	PL_runops = RUNOPS_DEFAULT;
		914	ENTER;
		915	SAVETMPS;
		916	EXTEND (SP, 3);
		917	PUSHMARK (SP);
		918	PUSHs (&PL_sv_yes);
		919	PUSHs (fullname);
		920	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		921	PUTBACK;
		922	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		923	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		924	SPAGAIN;
		925	FREETMPS;
		926	LEAVE;
		927	PL_runops = runops_trace;
		928	}
		929
		930	oldcxix = cxstack_ix;
		931	}
		932
		933	if (cctx->flags & CC_TRACE_LINE)
		934	{
		935	dSP;
		936
		937	PL_runops = RUNOPS_DEFAULT;
		938	ENTER;
		939	SAVETMPS;
		940	EXTEND (SP, 3);
		941	PL_runops = RUNOPS_DEFAULT;
		942	PUSHMARK (SP);
		943	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		944	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		945	PUTBACK;
		946	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		947	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		948	SPAGAIN;
		949	FREETMPS;
		950	LEAVE;
		951	PL_runops = runops_trace;
		952	}
		953	}
		954	}
		955	}
		956	}
		957
		958	TAINT_NOT;
		959	return 0;
		960	}
		961
		962	/* inject a fake call to Coro::State::_cctx_init into the execution */
		963	/* _cctx_init should be careful, as it could be called at almost any time */
		964	/* during execution of a perl program */
		965	static void NOINLINE
		966	cctx_prepare (pTHX_ coro_cctx *cctx)
		967	{
543	dSP;	968	dSP;
544	UNOP myop;	969	LOGOP myop;
545	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
546		970
547	coro_init_stacks (aTHX);	971	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		972
553	SPAGAIN;	973	if (cctx->flags & CC_TRACE)
		974	PL_runops = runops_trace;
554		975
555	Zero (&myop, 1, UNOP);	976	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	977	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	978	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
558		979
		980	PUSHMARK (SP);
		981	EXTEND (SP, 2);
		982	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		983	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		984	PUTBACK;
559	PL_op = (OP *)&myop;	985	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	986	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	987	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	988	}
569		989
		990	/*
		991	* this is a _very_ stripped down perl interpreter ;)
		992	*/
570	static void	993	static void
571	transfer_tail ()	994	cctx_run (void *arg)
572	{	995	{
573	if (coro_mortal)	996	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		997
		998	/* cctx_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	999	UNLOCK;
		1000
		1001	/* we now skip the entersub that lead to transfer() */
		1002	PL_op = PL_op->op_next;
		1003
		1004	/* inject a fake subroutine call to cctx_init */
		1005	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1006
		1007	/* somebody or something will hit me for both perl_run and PL_restartop */
		1008	PL_restartop = PL_op;
		1009	perl_run (PL_curinterp);
		1010
		1011	/*
		1012	* If perl-run returns we assume exit() was being called or the coro
		1013	* fell off the end, which seems to be the only valid (non-bug)
		1014	* reason for perl_run to return. We try to exit by jumping to the
		1015	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1016	* coroutine as Coro has no such concept
		1017	*/
		1018	PL_top_env = main_top_env;
		1019	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1020	}
		1021
		1022	static coro_cctx *
		1023	cctx_new ()
		1024	{
		1025	coro_cctx *cctx;
		1026	void *stack_start;
		1027	size_t stack_size;
		1028
		1029	++cctx_count;
		1030
		1031	Newz (0, cctx, 1, coro_cctx);
		1032
		1033	#if HAVE_MMAP
		1034	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1035	/* mmap supposedly does allocate-on-write for us */
		1036	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		1037
		1038	if (cctx->sptr != (void *)-1)
		1039	{
		1040	# if CORO_STACKGUARD
		1041	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1042	# endif
		1043	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1044	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1045	cctx->flags \|= CC_MAPPED;
		1046	}
		1047	else
		1048	#endif
		1049	{
		1050	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1051	New (0, cctx->sptr, coro_stacksize, long);
		1052
		1053	if (!cctx->sptr)
		1054	{
		1055	perror ("FATAL: unable to allocate stack for coroutine");
		1056	_exit (EXIT_FAILURE);
		1057	}
		1058
		1059	stack_start = cctx->sptr;
		1060	stack_size = cctx->ssize;
		1061	}
		1062
		1063	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		1064	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1065
		1066	return cctx;
580	}	1067	}
581		1068
582	static void	1069	static void
583	coro_run (void *arg)	1070	cctx_destroy (coro_cctx *cctx)
584	{	1071	{
585	/*	1072	if (!cctx)
586	* this is a _very_ stripped down perl interpreter ;)	1073	return;
587	*/
588	dTHX;
589		1074
590	transfer_tail ();	1075	--cctx_count;
591		1076
592	PL_top_env = &PL_start_env;	1077	#if CORO_USE_VALGRIND
593	PL_restartop = PL_op;	1078	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
594	/* somebody will hit me for both perl_run and PL_restart_top */	1079	#endif
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}
599
600	static coro_stack *
601	stack_new ()
602	{
603	coro_stack *stack;
604
605	New (0, stack, 1, coro_stack);
606		1080
607	#if HAVE_MMAP	1081	#if HAVE_MMAP
		1082	if (cctx->flags & CC_MAPPED)
		1083	munmap (cctx->sptr, cctx->ssize);
		1084	else
		1085	#endif
		1086	Safefree (cctx->sptr);
608		1087
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	1088	Safefree (cctx);
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1089	}
611		1090
612	if (stack->sptr == (void *)-1)	1091	/* wether this cctx should be destructed */
613	{	1092	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	1093
615	_exit (EXIT_FAILURE);	1094	static coro_cctx *
		1095	cctx_get (pTHX)
		1096	{
		1097	while (expect_true (cctx_first))
616	}	1098	{
		1099	coro_cctx *cctx = cctx_first;
		1100	cctx_first = cctx->next;
		1101	--cctx_idle;
617		1102
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1103	if (expect_true (!CCTX_EXPIRED (cctx)))
		1104	return cctx;
619		1105
620	#else	1106	cctx_destroy (cctx);
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	1107	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		1108
631	#endif	1109	return cctx_new ();
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
634
635	return stack;
636	}	1110	}
637		1111
638	static void	1112	static void
639	stack_free (coro_stack *stack)	1113	cctx_put (coro_cctx *cctx)
640	{	1114	{
641	if (!stack \|\| stack == main_stack)	1115	/* free another cctx if overlimit */
642	return;	1116	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
643
644	#if HAVE_MMAP
645	munmap (stack->sptr, stack->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
666	{	1117	{
667	stack = stack_new ();	1118	coro_cctx *first = cctx_first;
668	PL_op = PL_op->op_next;	1119	cctx_first = first->next;
		1120	--cctx_idle;
		1121
		1122	cctx_destroy (first);
669	}	1123	}
670		1124
671	return stack;	1125	++cctx_idle;
		1126	cctx->next = cctx_first;
		1127	cctx_first = cctx;
672	}	1128	}
		1129
		1130	/ coroutine switching ***************************************************/
673		1131
674	static void	1132	static void
675	stack_put (coro_stack *stack)	1133	transfer_check (pTHX_ struct coro prev, struct coro next)
676	{	1134	{
677	stack->next = stack_first;	1135	if (expect_true (prev != next))
678	stack_first = stack;	1136	{
679	}	1137	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1138	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
680		1139
681	/* never call directly, always through the coro_state_transfer global variable */	1140	if (expect_false (next->flags & CF_RUNNING))
682	static void	1141	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1142
		1143	if (expect_false (next->flags & CF_DESTROYED))
		1144	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1145
		1146	#if !PERL_VERSION_ATLEAST (5,10,0)
		1147	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1148	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1149	#endif
		1150	}
		1151	}
		1152
		1153	/* always use the TRANSFER macro */
		1154	static void NOINLINE
683	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	1155	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
684	{	1156	{
685	dSTACKLEVEL;	1157	dSTACKLEVEL;
		1158	static volatile int has_throw;
686		1159
687	/* sometimes transfer is only called to set idle_sp */	1160	/* sometimes transfer is only called to set idle_sp */
688	if (!prev->stack->idle_sp)	1161	if (expect_false (!next))
689	prev->stack->idle_sp = stacklevel;	1162	{
690		1163	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
691	LOCK;	1164	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
692
693	if (prev != next)
694	{	1165	}
695	coro_stack *prev_stack = prev->stack;	1166	else if (expect_true (prev != next))
		1167	{
		1168	coro_cctx *prev__cctx;
696		1169
697	/* possibly "free" the stack */	1170	if (expect_false (prev->flags & CF_NEW))
698	if (0 && prev_stack->idle_sp == stacklevel)
699	{	1171	{
700	stack_put (prev_stack);	1172	/* create a new empty context */
701	prev->stack = 0;	1173	Newz (0, prev->cctx, 1, coro_cctx);
		1174	prev->flags &= ~CF_NEW;
		1175	prev->flags \|= CF_RUNNING;
702	}	1176	}
703		1177
704	if (next->mainstack)	1178	prev->flags &= ~CF_RUNNING;
		1179	next->flags \|= CF_RUNNING;
		1180
		1181	LOCK;
		1182
		1183	/* first get rid of the old state */
		1184	save_perl (aTHX_ prev);
		1185
		1186	if (expect_false (next->flags & CF_NEW))
705	{	1187	{
706	/* coroutine already started */	1188	/* need to start coroutine */
707	SAVE (prev, flags);	1189	next->flags &= ~CF_NEW;
708	LOAD (next);	1190	/* setup coroutine call */
		1191	coro_setup (aTHX_ next);
709	}	1192	}
710	else	1193	else
		1194	load_perl (aTHX_ next);
		1195
		1196	prev__cctx = prev->cctx;
		1197
		1198	/* possibly "free" the cctx */
		1199	if (expect_true (
		1200	prev__cctx->idle_sp == STACKLEVEL
		1201	&& !(prev__cctx->flags & CC_TRACE)
		1202	&& !force_cctx
		1203	))
711	{	1204	{
712	/* need to start coroutine */	1205	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
713	/* first get rid of the old state */	1206	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
714	SAVE (prev, -1);	1207
715	/* setup coroutine call */	1208	prev->cctx = 0;
716	setup_coro (next);	1209
717	/* need to change stack from main_stack to real one */	1210	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
718	next->stack = 0;	1211	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1212	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1213	if (!next->cctx)
		1214	next->cctx = cctx_get (aTHX);
		1215
		1216	cctx_put (prev__cctx);
719	}	1217	}
720		1218
721	if (!next->stack)	1219	++next->usecount;
722	next->stack = stack_get ();
723		1220
724	if (prev_stack != next->stack)	1221	if (expect_true (!next->cctx))
		1222	next->cctx = cctx_get (aTHX);
		1223
		1224	has_throw = !!next->throw;
		1225
		1226	if (expect_false (prev__cctx != next->cctx))
		1227	{
		1228	prev__cctx->top_env = PL_top_env;
		1229	PL_top_env = next->cctx->top_env;
725	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1230	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
726	}	1231	}
727		1232
728	transfer_tail ();	1233	free_coro_mortal (aTHX);
729	}	1234	UNLOCK;
730		1235
731	/* use this function pointer to call the above function */	1236	if (expect_false (has_throw))
732	/* this is done to increase chances of the compiler not inlining the call */	1237	{
733	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	1238	struct coro *coro = SvSTATE (coro_current);
734		1239
		1240	if (coro->throw)
		1241	{
		1242	SV *exception = coro->throw;
		1243	coro->throw = 0;
		1244	sv_setsv (ERRSV, exception);
		1245	croak (0);
		1246	}
		1247	}
		1248	}
		1249	}
		1250
		1251	struct transfer_args
		1252	{
		1253	struct coro prev, next;
		1254	};
		1255
		1256	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1257	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1258
		1259	/ high level stuff ******************************************************/
		1260
735	static void	1261	static int
736	coro_state_destroy (struct coro *coro)	1262	coro_state_destroy (pTHX_ struct coro *coro)
737	{	1263	{
738	if (coro->refcnt--)	1264	if (coro->flags & CF_DESTROYED)
739	return;	1265	return 0;
		1266
		1267	coro->flags \|= CF_DESTROYED;
		1268
		1269	if (coro->flags & CF_READY)
		1270	{
		1271	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1272	/* alternative: look through all ready queues and remove the coro */
		1273	LOCK;
		1274	--coro_nready;
		1275	UNLOCK;
		1276	}
		1277	else
		1278	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
740		1279
741	if (coro->mainstack && coro->mainstack != main_mainstack)	1280	if (coro->mainstack && coro->mainstack != main_mainstack)
742	{	1281	{
743	struct coro temp;	1282	struct coro temp;
744		1283
745	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1284	if (coro->flags & CF_RUNNING)
		1285	croak ("FATAL: tried to destroy currently running coroutine");
		1286
		1287	save_perl (aTHX_ &temp);
746	LOAD (aTHX_ coro);	1288	load_perl (aTHX_ coro);
747		1289
748	destroy_stacks (aTHX);	1290	coro_destroy (aTHX_ coro);
749		1291
750	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1292	load_perl (aTHX_ &temp);
751		1293
752	coro->mainstack = 0;	1294	coro->slot = 0;
753	}	1295	}
754		1296
755	stack_free (coro->stack);	1297	cctx_destroy (coro->cctx);
756	SvREFCNT_dec (coro->args);	1298	SvREFCNT_dec (coro->args);
757	Safefree (coro);	1299
		1300	if (coro->next) coro->next->prev = coro->prev;
		1301	if (coro->prev) coro->prev->next = coro->next;
		1302	if (coro == coro_first) coro_first = coro->next;
		1303
		1304	return 1;
758	}	1305	}
759		1306
760	static int	1307	static int
761	coro_state_clear (SV sv, MAGIC mg)	1308	coro_state_free (pTHX_ SV sv, MAGIC mg)
762	{	1309	{
763	struct coro coro = (struct coro )mg->mg_ptr;	1310	struct coro coro = (struct coro )mg->mg_ptr;
764	mg->mg_ptr = 0;	1311	mg->mg_ptr = 0;
765		1312
		1313	coro->hv = 0;
		1314
		1315	if (--coro->refcnt < 0)
		1316	{
766	coro_state_destroy (coro);	1317	coro_state_destroy (aTHX_ coro);
		1318	Safefree (coro);
		1319	}
767		1320
768	return 0;	1321	return 0;
769	}	1322	}
770		1323
771	static int	1324	static int
772	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	1325	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
773	{	1326	{
774	struct coro coro = (struct coro )mg->mg_ptr;	1327	struct coro coro = (struct coro )mg->mg_ptr;
775		1328
776	++coro->refcnt;	1329	++coro->refcnt;
777		1330
778	return 0;	1331	return 0;
779	}	1332	}
780		1333
781	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1334	static MGVTBL coro_state_vtbl = {
782		1335	0, 0, 0, 0,
783	static struct coro *	1336	coro_state_free,
784	SvSTATE (SV *coro)	1337	0,
785	{	1338	#ifdef MGf_DUP
786	HV *stash;	1339	coro_state_dup,
787	MAGIC *mg;	1340	#else
788		1341	# define MGf_DUP 0
789	if (SvROK (coro))	1342	#endif
790	coro = SvRV (coro);	1343	};
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		1344
805	static void	1345	static void
		1346	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1347	{
		1348	ta->prev = SvSTATE (prev_sv);
		1349	ta->next = SvSTATE (next_sv);
		1350	TRANSFER_CHECK (*ta);
		1351	}
		1352
		1353	static void
806	api_transfer (pTHX_ SV prev, SV next, int flags)	1354	api_transfer (SV prev_sv, SV next_sv)
807	{	1355	{
808	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1356	dTHX;
		1357	struct transfer_args ta;
		1358
		1359	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1360	TRANSFER (ta, 1);
809	}	1361	}
810		1362
811	/ Coro ******************************************************************/	1363	/ Coro ******************************************************************/
812		1364
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	1365	static void
826	coro_enq (pTHX_ SV *sv)	1366	coro_enq (pTHX_ SV *coro_sv)
		1367	{
		1368	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1369	}
		1370
		1371	static SV *
		1372	coro_deq (pTHX)
827	{	1373	{
828	int prio;	1374	int prio;
829		1375
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);
836	coro_nready++;
837	}
838
839	static SV *
840	coro_deq (pTHX_ int min_prio)
841	{
842	int prio = PRIO_MAX - PRIO_MIN;
843
844	min_prio -= PRIO_MIN;
845	if (min_prio < 0)
846	min_prio = 0;
847
848	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1376	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
849	if (AvFILLp (coro_ready [prio]) >= 0)	1377	if (AvFILLp (coro_ready [prio]) >= 0)
850	{
851	coro_nready--;
852	return av_shift (coro_ready [prio]);	1378	return av_shift (coro_ready [prio]);
853	}
854		1379
855	return 0;	1380	return 0;
856	}	1381	}
857		1382
		1383	static int
		1384	api_ready (SV *coro_sv)
		1385	{
		1386	dTHX;
		1387	struct coro *coro;
		1388	SV *hook;
		1389
		1390	if (SvROK (coro_sv))
		1391	coro_sv = SvRV (coro_sv);
		1392
		1393	coro = SvSTATE (coro_sv);
		1394
		1395	if (coro->flags & CF_READY)
		1396	return 0;
		1397
		1398	coro->flags \|= CF_READY;
		1399
		1400	LOCK;
		1401
		1402	hook = coro_nready ? 0 : coro_readyhook;
		1403
		1404	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1405	++coro_nready;
		1406
		1407	UNLOCK;
		1408
		1409	if (hook)
		1410	{
		1411	dSP;
		1412
		1413	ENTER;
		1414	SAVETMPS;
		1415
		1416	PUSHMARK (SP);
		1417	PUTBACK;
		1418	call_sv (hook, G_DISCARD);
		1419	SPAGAIN;
		1420
		1421	FREETMPS;
		1422	LEAVE;
		1423	}
		1424
		1425	return 1;
		1426	}
		1427
		1428	static int
		1429	api_is_ready (SV *coro_sv)
		1430	{
		1431	dTHX;
		1432	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1433	}
		1434
858	static void	1435	static void
859	api_ready (SV *coro)	1436	prepare_schedule (pTHX_ struct transfer_args *ta)
860	{	1437	{
861	dTHX;	1438	SV prev_sv, next_sv;
862		1439
863	if (SvROK (coro))	1440	for (;;)
864	coro = SvRV (coro);	1441	{
		1442	LOCK;
		1443	next_sv = coro_deq (aTHX);
		1444
		1445	/* nothing to schedule: call the idle handler */
		1446	if (expect_false (!next_sv))
		1447	{
		1448	dSP;
		1449	UNLOCK;
		1450
		1451	ENTER;
		1452	SAVETMPS;
		1453
		1454	PUSHMARK (SP);
		1455	PUTBACK;
		1456	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1457	SPAGAIN;
		1458
		1459	FREETMPS;
		1460	LEAVE;
		1461	continue;
		1462	}
		1463
		1464	ta->next = SvSTATE (next_sv);
		1465
		1466	/* cannot transfer to destroyed coros, skip and look for next */
		1467	if (expect_false (ta->next->flags & CF_DESTROYED))
		1468	{
		1469	UNLOCK;
		1470	SvREFCNT_dec (next_sv);
		1471	/* coro_nready is already taken care of by destroy */
		1472	continue;
		1473	}
		1474
		1475	--coro_nready;
		1476	UNLOCK;
		1477	break;
		1478	}
		1479
		1480	/* free this only after the transfer */
		1481	prev_sv = SvRV (coro_current);
		1482	ta->prev = SvSTATE (prev_sv);
		1483	TRANSFER_CHECK (*ta);
		1484	assert (ta->next->flags & CF_READY);
		1485	ta->next->flags &= ~CF_READY;
		1486	SvRV_set (coro_current, next_sv);
865		1487
866	LOCK;	1488	LOCK;
867	coro_enq (aTHX_ SvREFCNT_inc (coro));	1489	free_coro_mortal (aTHX);
		1490	coro_mortal = prev_sv;
868	UNLOCK;	1491	UNLOCK;
		1492	}
		1493
		1494	static void
		1495	prepare_cede (pTHX_ struct transfer_args *ta)
		1496	{
		1497	api_ready (coro_current);
		1498	prepare_schedule (aTHX_ ta);
		1499	}
		1500
		1501	static int
		1502	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1503	{
		1504	if (coro_nready)
		1505	{
		1506	SV *prev = SvRV (coro_current);
		1507	prepare_schedule (aTHX_ ta);
		1508	api_ready (prev);
		1509	return 1;
		1510	}
		1511	else
		1512	return 0;
869	}	1513	}
870		1514
871	static void	1515	static void
872	api_schedule (void)	1516	api_schedule (void)
873	{	1517	{
874	dTHX;	1518	dTHX;
		1519	struct transfer_args ta;
875		1520
876	SV prev, next;	1521	prepare_schedule (aTHX_ &ta);
877	SV *current = GvSV (coro_current);	1522	TRANSFER (ta, 1);
		1523	}
878		1524
879	for (;;)	1525	static int
880	{	1526	api_cede (void)
881	LOCK;	1527	{
		1528	dTHX;
		1529	struct transfer_args ta;
882		1530
883	next = coro_deq (aTHX_ PRIO_MIN);	1531	prepare_cede (aTHX_ &ta);
884		1532
885	if (next)	1533	if (expect_true (ta.prev != ta.next))
886	break;
887
888	UNLOCK;
889
890	{	1534	{
891	dSP;	1535	TRANSFER (ta, 1);
892		1536	return 1;
893	ENTER;
894	SAVETMPS;
895
896	PUSHMARK (SP);
897	PUTBACK;
898	call_sv (GvSV (coro_idle), G_DISCARD);
899
900	FREETMPS;
901	LEAVE;
902	}	1537	}
		1538	else
		1539	return 0;
		1540	}
		1541
		1542	static int
		1543	api_cede_notself (void)
		1544	{
		1545	dTHX;
		1546	struct transfer_args ta;
		1547
		1548	if (prepare_cede_notself (aTHX_ &ta))
903	}	1549	{
904		1550	TRANSFER (ta, 1);
905	prev = SvRV (current);	1551	return 1;
906	SvRV (current) = next;	1552	}
907		1553	else
908	/* free this only after the transfer */	1554	return 0;
909	coro_mortal = prev;
910
911	UNLOCK;
912
913	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
914	}	1555	}
915
916	static int coro_cede_self;
917		1556
918	static void	1557	static void
919	api_cede (void)	1558	api_trace (SV *coro_sv, int flags)
920	{	1559	{
921	dTHX;	1560	dTHX;
922	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1561	struct coro *coro = SvSTATE (coro_sv);
923		1562
924	LOCK;	1563	if (flags & CC_TRACE)
925
926	if (coro_cede_self)
927	{
928	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
929	av_unshift (runqueue, 1);
930	av_store (runqueue, 0, current);
931	coro_nready++;
932	coro_cede_self = 0;
933	}	1564	{
		1565	if (!coro->cctx)
		1566	coro->cctx = cctx_new ();
		1567	else if (!(coro->cctx->flags & CC_TRACE))
		1568	croak ("cannot enable tracing on coroutine with custom stack");
		1569
		1570	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1571	}
		1572	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1573	{
		1574	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1575
		1576	if (coro->flags & CF_RUNNING)
		1577	PL_runops = RUNOPS_DEFAULT;
934	else	1578	else
935	coro_enq (aTHX_ current);	1579	coro->slot->runops = RUNOPS_DEFAULT;
936		1580	}
937	UNLOCK;
938
939	api_schedule ();
940	}	1581	}
941		1582
942	MODULE = Coro::State PACKAGE = Coro::State	1583	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
943		1584
944	PROTOTYPES: DISABLE	1585	PROTOTYPES: DISABLE
945		1586
946	BOOT:	1587	BOOT:
947	{	1588	{
948	#ifdef USE_ITHREADS	1589	#ifdef USE_ITHREADS
949	MUTEX_INIT (&coro_mutex);	1590	MUTEX_INIT (&coro_mutex);
950	#endif	1591	#endif
951	BOOT_PAGESIZE;	1592	BOOT_PAGESIZE;
952		1593
		1594	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1595	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1596
		1597	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1598	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1599	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1600	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1601
		1602	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1603	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1604	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1605
953	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1606	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
954		1607
955	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1608	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
956	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1609	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
957	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1610	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1611	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
958		1612
959	main_mainstack = PL_mainstack;	1613	main_mainstack = PL_mainstack;
		1614	main_top_env = PL_top_env;
		1615
		1616	while (main_top_env->je_prev)
		1617	main_top_env = main_top_env->je_prev;
960		1618
961	coroapi.ver = CORO_API_VERSION;	1619	coroapi.ver = CORO_API_VERSION;
		1620	coroapi.rev = CORO_API_REVISION;
962	coroapi.transfer = api_transfer;	1621	coroapi.transfer = api_transfer;
963
964	Newz (0, main_stack, 1, coro_stack);
965	main_stack->idle_sp = (void *)-1;
966		1622
967	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1623	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
968	}	1624	}
969		1625
970	SV *	1626	SV *
971	new (char *klass, ...)	1627	new (char *klass, ...)
972	CODE:	1628	CODE:
973	{	1629	{
974	struct coro *coro;	1630	struct coro *coro;
		1631	MAGIC *mg;
975	HV *hv;	1632	HV *hv;
976	int i;	1633	int i;
977		1634
978	Newz (0, coro, 1, struct coro);	1635	Newz (0, coro, 1, struct coro);
979	coro->args = newAV ();	1636	coro->args = newAV ();
		1637	coro->flags = CF_NEW;
980		1638
		1639	if (coro_first) coro_first->prev = coro;
		1640	coro->next = coro_first;
		1641	coro_first = coro;
		1642
981	hv = newHV ();	1643	coro->hv = hv = newHV ();
982	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1644	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1645	mg->mg_flags \|= MGf_DUP;
983	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1646	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984		1647
985	av_push (coro->args, newSVsv (RETVAL));	1648	av_extend (coro->args, items - 1);
986	for (i = 1; i < items; i++)	1649	for (i = 1; i < items; i++)
987	av_push (coro->args, newSVsv (ST (i)));	1650	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	}	1651	}
993	OUTPUT:	1652	OUTPUT:
994	RETVAL	1653	RETVAL
995		1654
		1655	# these not obviously related functions are all rolled into the same xs
		1656	# function to increase chances that they all will call transfer with the same
		1657	# stack offset
996	void	1658	void
997	transfer (prev, next, flags)	1659	_set_stacklevel (...)
998	SV *prev	1660	ALIAS:
999	SV *next	1661	Coro::State::transfer = 1
1000	int flags	1662	Coro::schedule = 2
		1663	Coro::cede = 3
		1664	Coro::cede_notself = 4
1001	CODE:	1665	CODE:
		1666	{
		1667	struct transfer_args ta;
		1668
1002	PUTBACK;	1669	PUTBACK;
1003	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1670	switch (ix)
		1671	{
		1672	case 0:
		1673	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1674	ta.next = 0;
		1675	break;
		1676
		1677	case 1:
		1678	if (items != 2)
		1679	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1680
		1681	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1682	break;
		1683
		1684	case 2:
		1685	prepare_schedule (aTHX_ &ta);
		1686	break;
		1687
		1688	case 3:
		1689	prepare_cede (aTHX_ &ta);
		1690	break;
		1691
		1692	case 4:
		1693	if (!prepare_cede_notself (aTHX_ &ta))
		1694	XSRETURN_EMPTY;
		1695
		1696	break;
		1697	}
1004	SPAGAIN;	1698	SPAGAIN;
1005		1699
1006	int	1700	BARRIER;
1007	prio (Coro::State coro, int newprio = 0)	1701	PUTBACK;
1008	ALIAS:	1702	TRANSFER (ta, 0);
1009	nice = 1	1703	SPAGAIN; /* might be the sp of a different coroutine now */
1010	CODE:	1704	/* be extra careful not to ever do anything after TRANSFER */
1011	{
1012	RETVAL = coro->prio;
1013
1014	if (items > 1)
1015	{
1016	if (ix)
1017	newprio += coro->prio;
1018
1019	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1020	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1021
1022	coro->prio = newprio;
1023	}
1024	}	1705	}
		1706
		1707	bool
		1708	_destroy (SV *coro_sv)
		1709	CODE:
		1710	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1711	OUTPUT:
		1712	RETVAL
1025		1713
1026	void	1714	void
1027	_clear_idle_sp (Coro::State self)
1028	CODE:
1029	self->stack->idle_sp = 0;
1030
1031	void
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
1043	void
1044	_exit (code)	1715	_exit (int code)
1045	int code
1046	PROTOTYPE: $	1716	PROTOTYPE: $
1047	CODE:	1717	CODE:
1048	_exit (code);	1718	_exit (code);
1049		1719
1050	MODULE = Coro::State PACKAGE = Coro::Cont	1720	int
		1721	cctx_stacksize (int new_stacksize = 0)
		1722	CODE:
		1723	RETVAL = coro_stacksize;
		1724	if (new_stacksize)
		1725	coro_stacksize = new_stacksize;
		1726	OUTPUT:
		1727	RETVAL
		1728
		1729	int
		1730	cctx_count ()
		1731	CODE:
		1732	RETVAL = cctx_count;
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	int
		1737	cctx_idle ()
		1738	CODE:
		1739	RETVAL = cctx_idle;
		1740	OUTPUT:
		1741	RETVAL
1051		1742
1052	void	1743	void
1053	yield (...)	1744	list ()
1054	PROTOTYPE: @	1745	PPCODE:
		1746	{
		1747	struct coro *coro;
		1748	for (coro = coro_first; coro; coro = coro->next)
		1749	if (coro->hv)
		1750	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1751	}
		1752
		1753	void
		1754	call (Coro::State coro, SV *coderef)
		1755	ALIAS:
		1756	eval = 1
		1757	CODE:
		1758	{
		1759	if (coro->mainstack)
		1760	{
		1761	struct coro temp;
		1762
		1763	if (!(coro->flags & CF_RUNNING))
		1764	{
		1765	PUTBACK;
		1766	save_perl (aTHX_ &temp);
		1767	load_perl (aTHX_ coro);
		1768	}
		1769
		1770	{
		1771	dSP;
		1772	ENTER;
		1773	SAVETMPS;
		1774	PUTBACK;
		1775	PUSHSTACK;
		1776	PUSHMARK (SP);
		1777
		1778	if (ix)
		1779	eval_sv (coderef, 0);
		1780	else
		1781	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1782
		1783	POPSTACK;
		1784	SPAGAIN;
		1785	FREETMPS;
		1786	LEAVE;
		1787	PUTBACK;
		1788	}
		1789
		1790	if (!(coro->flags & CF_RUNNING))
		1791	{
		1792	save_perl (aTHX_ coro);
		1793	load_perl (aTHX_ &temp);
		1794	SPAGAIN;
		1795	}
		1796	}
		1797	}
		1798
		1799	SV *
		1800	is_ready (Coro::State coro)
		1801	PROTOTYPE: $
		1802	ALIAS:
		1803	is_ready = CF_READY
		1804	is_running = CF_RUNNING
		1805	is_new = CF_NEW
		1806	is_destroyed = CF_DESTROYED
		1807	CODE:
		1808	RETVAL = boolSV (coro->flags & ix);
		1809	OUTPUT:
		1810	RETVAL
		1811
		1812	void
		1813	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1814
		1815	SV *
		1816	has_cctx (Coro::State coro)
		1817	PROTOTYPE: $
		1818	CODE:
		1819	RETVAL = boolSV (!!coro->cctx);
		1820	OUTPUT:
		1821	RETVAL
		1822
		1823	int
		1824	is_traced (Coro::State coro)
		1825	PROTOTYPE: $
		1826	CODE:
		1827	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1828	OUTPUT:
		1829	RETVAL
		1830
		1831	IV
		1832	rss (Coro::State coro)
		1833	PROTOTYPE: $
		1834	ALIAS:
		1835	usecount = 1
1055	CODE:	1836	CODE:
1056	{	1837	switch (ix)
1057	SV *yieldstack;	1838	{
1058	SV *sv;	1839	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	AV *defav = GvAV (PL_defgv);	1840	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	1841	}
1066	);	1842	OUTPUT:
		1843	RETVAL
1067		1844
1068	/* set up @_ -- ugly */	1845	void
1069	av_clear (defav);	1846	force_cctx ()
1070	av_fill (defav, items - 1);	1847	CODE:
1071	while (items--)	1848	struct coro *coro = SvSTATE (coro_current);
1072	av_store (defav, items, SvREFCNT_inc (ST(items)));	1849	coro->cctx->idle_sp = 0;
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		1850
1082	MODULE = Coro::State PACKAGE = Coro	1851	MODULE = Coro::State PACKAGE = Coro
1083		1852
1084	BOOT:	1853	BOOT:
1085	{	1854	{
1086	int i;	1855	int i;
1087		1856
		1857	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1858	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1859	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1860
		1861	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1862	SvREADONLY_on (coro_current);
		1863
1088	coro_stash = gv_stashpv ("Coro", TRUE);	1864	coro_stash = gv_stashpv ("Coro", TRUE);
1089		1865
1090	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1866	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1091	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1867	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1092	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1868	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1093	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1869	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1094	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1870	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1095	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1871	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1096		1872
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--; )	1873	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1101	coro_ready[i] = newAV ();	1874	coro_ready[i] = newAV ();
1102		1875
1103	{	1876	{
1104	SV *sv = perl_get_sv("Coro::API", 1);	1877	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1878	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1105		1879
1106	coroapi.schedule = api_schedule;	1880	coroapi.schedule = api_schedule;
1107	coroapi.cede = api_cede;	1881	coroapi.cede = api_cede;
		1882	coroapi.cede_notself = api_cede_notself;
1108	coroapi.ready = api_ready;	1883	coroapi.ready = api_ready;
		1884	coroapi.is_ready = api_is_ready;
1109	coroapi.nready = &coro_nready;	1885	coroapi.nready = &coro_nready;
1110	coroapi.current = coro_current;	1886	coroapi.current = coro_current;
1111		1887
1112	GCoroAPI = &coroapi;	1888	GCoroAPI = &coroapi;
1113	sv_setiv (sv, (IV)&coroapi);	1889	sv_setiv (sv, (IV)&coroapi);
1114	SvREADONLY_on (sv);	1890	SvREADONLY_on (sv);
1115	}	1891	}
1116	}	1892	}
1117		1893
1118	void	1894	void
		1895	_set_current (SV *current)
		1896	PROTOTYPE: $
		1897	CODE:
		1898	SvREFCNT_dec (SvRV (coro_current));
		1899	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1900
		1901	void
		1902	_set_readyhook (SV *hook)
		1903	PROTOTYPE: $
		1904	CODE:
		1905	LOCK;
		1906	if (coro_readyhook)
		1907	SvREFCNT_dec (coro_readyhook);
		1908	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1909	UNLOCK;
		1910
		1911	int
		1912	prio (Coro::State coro, int newprio = 0)
		1913	ALIAS:
		1914	nice = 1
		1915	CODE:
		1916	{
		1917	RETVAL = coro->prio;
		1918
		1919	if (items > 1)
		1920	{
		1921	if (ix)
		1922	newprio = coro->prio - newprio;
		1923
		1924	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1925	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1926
		1927	coro->prio = newprio;
		1928	}
		1929	}
		1930	OUTPUT:
		1931	RETVAL
		1932
		1933	SV *
1119	ready (SV *self)	1934	ready (SV *self)
1120	PROTOTYPE: $	1935	PROTOTYPE: $
1121	CODE:	1936	CODE:
1122	api_ready (self);	1937	RETVAL = boolSV (api_ready (self));
		1938	OUTPUT:
		1939	RETVAL
1123		1940
1124	int	1941	int
1125	nready (...)	1942	nready (...)
1126	PROTOTYPE:	1943	PROTOTYPE:
1127	CODE:	1944	CODE:
1128	RETVAL = coro_nready;	1945	RETVAL = coro_nready;
1129	OUTPUT:	1946	OUTPUT:
1130	RETVAL	1947	RETVAL
1131		1948
1132	void	1949	void
1133	schedule (...)	1950	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1951	PROTOTYPE: $;$
		1952	CODE:
		1953	SvREFCNT_dec (self->throw);
		1954	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1955
		1956	void
		1957	swap_defsv (Coro::State self)
1134	PROTOTYPE:	1958	PROTOTYPE: $
		1959	ALIAS:
		1960	swap_defav = 1
		1961	CODE:
		1962	if (!self->slot)
		1963	croak ("cannot swap state with coroutine that has no saved state");
		1964	else
		1965	{
		1966	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1967	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1968
		1969	SV tmp = src; src = dst; *dst = tmp;
		1970	}
		1971
		1972	# for async_pool speedup
		1973	void
		1974	_pool_1 (SV *cb)
1135	CODE:	1975	CODE:
1136	api_schedule ();	1976	{
		1977	struct coro *coro = SvSTATE (coro_current);
		1978	HV hv = (HV )SvRV (coro_current);
		1979	AV *defav = GvAV (PL_defgv);
		1980	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1981	AV *invoke_av;
		1982	int i, len;
		1983
		1984	if (!invoke)
		1985	{
		1986	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1987	croak ("\3async_pool terminate\2\n");
		1988	}
		1989
		1990	SvREFCNT_dec (coro->saved_deffh);
		1991	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1992
		1993	hv_store (hv, "desc", sizeof ("desc") - 1,
		1994	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1995
		1996	invoke_av = (AV *)SvRV (invoke);
		1997	len = av_len (invoke_av);
		1998
		1999	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2000
		2001	if (len > 0)
		2002	{
		2003	av_fill (defav, len - 1);
		2004	for (i = 0; i < len; ++i)
		2005	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2006	}
		2007
		2008	SvREFCNT_dec (invoke);
		2009	}
1137		2010
1138	void	2011	void
1139	_set_cede_self ()	2012	_pool_2 (SV *cb)
1140	CODE:	2013	CODE:
1141	coro_cede_self = 1;	2014	{
		2015	struct coro *coro = SvSTATE (coro_current);
1142		2016
1143	void	2017	sv_setsv (cb, &PL_sv_undef);
1144	cede (...)	2018
1145	PROTOTYPE:	2019	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
1146	CODE:	2020	coro->saved_deffh = 0;
1147	api_cede ();	2021
		2022	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2023	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2024	{
		2025	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		2026	croak ("\3async_pool terminate\2\n");
		2027	}
		2028
		2029	av_clear (GvAV (PL_defgv));
		2030	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2031	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2032
		2033	coro->prio = 0;
		2034
		2035	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2036	api_trace (coro_current, 0);
		2037
		2038	av_push (av_async_pool, newSVsv (coro_current));
		2039	}
		2040
1148		2041
1149	MODULE = Coro::State PACKAGE = Coro::AIO	2042	MODULE = Coro::State PACKAGE = Coro::AIO
1150		2043
1151	SV *	2044	SV *
1152	_get_state ()	2045	_get_state ()
1153	CODE:	2046	CODE:
1154	{	2047	{
1155	struct {	2048	struct io_state *data;
1156	int errorno;
1157	int laststype;
1158	int laststatval;
1159	Stat_t statcache;
1160	} data;
1161		2049
		2050	RETVAL = newSV (sizeof (struct io_state));
		2051	data = (struct io_state *)SvPVX (RETVAL);
		2052	SvCUR_set (RETVAL, sizeof (struct io_state));
		2053	SvPOK_only (RETVAL);
		2054
1162	data.errorno = errno;	2055	data->errorno = errno;
1163	data.laststype = PL_laststype;	2056	data->laststype = PL_laststype;
1164	data.laststatval = PL_laststatval;	2057	data->laststatval = PL_laststatval;
1165	data.statcache = PL_statcache;	2058	data->statcache = PL_statcache;
1166
1167	RETVAL = newSVpvn ((char *)&data, sizeof data);
1168	}	2059	}
1169	OUTPUT:	2060	OUTPUT:
1170	RETVAL	2061	RETVAL
1171		2062
1172	void	2063	void
1173	_set_state (char *data_)	2064	_set_state (char *data_)
1174	PROTOTYPE: $	2065	PROTOTYPE: $
1175	CODE:	2066	CODE:
1176	{	2067	{
1177	struct {	2068	struct io_state data = (void )data_;
1178	int errorno;
1179	int laststype;
1180	int laststatval;
1181	Stat_t statcache;
1182	} data = (void )data_;
1183		2069
1184	errno = data->errorno;	2070	errno = data->errorno;
1185	PL_laststype = data->laststype;	2071	PL_laststype = data->laststype;
1186	PL_laststatval = data->laststatval;	2072	PL_laststatval = data->laststatval;
1187	PL_statcache = data->statcache;	2073	PL_statcache = data->statcache;
1188	}	2074	}
		2075
		2076
		2077	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2078
		2079	BOOT:
		2080	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2081
		2082	SV *
		2083	_schedule ()
		2084	PROTOTYPE: @
		2085	CODE:
		2086	{
		2087	static int incede;
		2088	fprintf (stderr, "_schedule\n");//D
		2089
		2090	api_cede_notself ();
		2091
		2092	++incede;
		2093	while (coro_nready >= incede && api_cede ())
		2094	;
		2095
		2096	sv_setsv (sv_activity, &PL_sv_undef);
		2097	if (coro_nready >= incede)
		2098	{
		2099	PUSHMARK (SP);
		2100	PUTBACK;
		2101	fprintf (stderr, "call act %d >= %d\n", coro_nready, incede);//D
		2102	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);
		2103	SPAGAIN;
		2104	}
		2105
		2106	--incede;
		2107	}
		2108

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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 1.234 by root, Fri May 9 22:29:05 2008 UTC

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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 1.234 by root, Fri May 9 22:29:05 2008 UTC