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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.217 by root, Wed Nov 14 11:32:56 2007 UTC vs.
Revision 1.431 by root, Fri Feb 8 22:29:18 2013 UTC

		1	/* this works around a bug in mingw32 providing a non-working setjmp */
		2	#define USE_NO_MINGW_SETJMP_TWO_ARGS
		3
		4	#define NDEBUG 1 /* perl usually disables NDEBUG later */
		5
1	#include "libcoro/coro.c"	6	#include "libcoro/coro.c"
2		7
3	#define PERL_NO_GET_CONTEXT	8	#define PERL_NO_GET_CONTEXT
4	#define PERL_EXT	9	#define PERL_EXT
5		10
6	#include "EXTERN.h"	11	#include "EXTERN.h"
7	#include "perl.h"	12	#include "perl.h"
8	#include "XSUB.h"	13	#include "XSUB.h"
		14	#include "perliol.h"
9		15
10	#include "patchlevel.h"	16	#include "schmorp.h"
11		17
		18	#define ECB_NO_THREADS 1
		19	#include "ecb.h"
		20
		21	#include <stddef.h>
12	#include <stdio.h>	22	#include <stdio.h>
13	#include <errno.h>	23	#include <errno.h>
14	#include <assert.h>	24	#include <assert.h>
15	#include <inttypes.h> /* portable stdint.h */
16		25
17	#ifdef HAVE_MMAP	26	#ifndef SVs_PADSTALE
18	# include <unistd.h>	27	# define SVs_PADSTALE 0
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	28	#endif
		29
		30	#ifdef PadARRAY
		31	# define NEWPADAPI
		32	# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
		33	#else
		34	typedef AV PADNAMELIST;
		35	# if !PERL_VERSION_ATLEAST(5,8,0)
		36	typedef AV PADLIST;
		37	typedef AV PAD;
26	# endif	38	# endif
27	# include <limits.h>	39	# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
28	# ifndef PAGESIZE	40	# define PadlistMAX(pl) AvFILLp (pl)
29	# define PAGESIZE pagesize	41	# define PadlistNAMES(pl) (*PadlistARRAY (pl))
30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	42	# define PadARRAY AvARRAY
31	static long pagesize;	43	# define PadMAX AvFILLp
32	# else	44	# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
33	# define BOOT_PAGESIZE (void)0
34	# endif	45	#endif
		46
		47	#if defined(_WIN32)
		48	# undef HAS_GETTIMEOFDAY
		49	# undef setjmp
		50	# undef longjmp
		51	# undef _exit
		52	# define setjmp _setjmp /* deep magic */
35	#else	53	#else
36	# define PAGESIZE 0	54	# include <inttypes.h> /* most portable stdint.h */
37	# define BOOT_PAGESIZE (void)0
38	#endif	55	#endif
39		56
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 */	57	/* the maximum number of idle cctx that will be pooled */
48	#define MAX_IDLE_CCTX 8	58	static int cctx_max_idle = 4;
49		59
50	#define PERL_VERSION_ATLEAST(a,b,c) \	60	#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
51	(PERL_REVISION > (a) \	61	# define HAS_SCOPESTACK_NAME 1
52	|| (PERL_REVISION == (a) \
53	&& (PERL_VERSION > (b) \
54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56	#if !PERL_VERSION_ATLEAST (5,6,0)
57	# ifndef PL_ppaddr
58	# define PL_ppaddr ppaddr
59	# endif
60	# ifndef call_sv
61	# define call_sv perl_call_sv
62	# endif
63	# ifndef get_sv
64	# define get_sv perl_get_sv
65	# endif
66	# ifndef get_cv
67	# define get_cv perl_get_cv
68	# endif
69	# ifndef IS_PADGV
70	# define IS_PADGV(v) 0
71	# endif
72	# ifndef IS_PADCONST
73	# define IS_PADCONST(v) 0
74	# endif
75	#endif
76
77	/* 5.8.7 */
78	#ifndef SvRV_set
79	# define SvRV_set(s,v) SvRV(s) = (v)
80	#endif
81
82	/* 5.8.8 */
83	#ifndef GV_NOTQUAL
84	# define GV_NOTQUAL 0
85	#endif
86	#ifndef newSV
87	# define newSV(l) NEWSV(0,l)
88	#endif
89
90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91	# undef CORO_STACKGUARD
92	#endif
93
94	#ifndef CORO_STACKGUARD
95	# define CORO_STACKGUARD 0
96	#endif	62	#endif
97		63
98	/* prefer perl internal functions over our own? */	64	/* prefer perl internal functions over our own? */
99	#ifndef CORO_PREFER_PERL_FUNCTIONS	65	#ifndef CORO_PREFER_PERL_FUNCTIONS
100	# define CORO_PREFER_PERL_FUNCTIONS 0	66	# define CORO_PREFER_PERL_FUNCTIONS 0
101	#endif	67	#endif
102		68
103	/* The next macros try to return the current stack pointer, in an as	69	/* The next macros try to return the current stack pointer, in an as
104	* portable way as possible. */	70	* portable way as possible. */
105	#define dSTACKLEVEL volatile char stacklevel
106	#define STACKLEVEL ((void *)&stacklevel)
107
108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
109
110	#if __GNUC__ >= 3	71	#if __GNUC__ >= 4
111	# define attribute(x) __attribute__(x)	72	# define dSTACKLEVEL int stacklevel_dummy
112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	73	# define STACKLEVEL __builtin_frame_address (0)
113	# define expect(expr,value) __builtin_expect ((expr),(value))
114	#else	74	#else
115	# define attribute(x)	75	# define dSTACKLEVEL volatile void *stacklevel
116	# define BARRIER	76	# define STACKLEVEL ((void *)&stacklevel)
117	# define expect(expr,value) (expr)
118	#endif	77	#endif
119		78
120	#define expect_false(expr) expect ((expr) != 0, 0)	79	#define IN_DESTRUCT PL_dirty
121	#define expect_true(expr) expect ((expr) != 0, 1)
122
123	#define NOINLINE attribute ((noinline))
124		80
125	#include "CoroAPI.h"	81	#include "CoroAPI.h"
		82	#define GCoroAPI (&coroapi) /* very sneaky */
126		83
127	#ifdef USE_ITHREADS	84	#ifdef USE_ITHREADS
128	static perl_mutex coro_mutex;	85	# if CORO_PTHREAD
129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	86	static void *coro_thx;
130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	87	# endif
131	#else
132	# define LOCK (void)0
133	# define UNLOCK (void)0
134	#endif	88	#endif
135		89
136	/* helper storage struct for Coro::AIO */	90	#ifdef __linux
137	struct io_state	91	# include <time.h> /* for timespec */
138	{	92	# include <syscall.h> /* for SYS_* */
139	int errorno;	93	# ifdef SYS_clock_gettime
140	I32 laststype;	94	# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
141	int laststatval;	95	# define CORO_CLOCK_MONOTONIC 1
142	Stat_t statcache;	96	# define CORO_CLOCK_THREAD_CPUTIME_ID 3
143	};	97	# endif
		98	#endif
144		99
		100	static double (*nvtime)(); /* so why doesn't it take void? */
		101	static void (*u2time)(pTHX_ UV ret[2]);
		102
		103	/* we hijack an hopefully unused CV flag for our purposes */
		104	#define CVf_SLF 0x4000
		105	static OP *pp_slf (pTHX);
		106	static void slf_destroy (pTHX_ struct coro *coro);
		107
		108	static U32 cctx_gen;
145	static size_t coro_stacksize = CORO_STACKSIZE;	109	static size_t cctx_stacksize = CORO_STACKSIZE;
146	static struct CoroAPI coroapi;	110	static struct CoroAPI coroapi;
147	static AV *main_mainstack; /* used to differentiate between $main and others */	111	static AV *main_mainstack; /* used to differentiate between $main and others */
148	static JMPENV *main_top_env;	112	static JMPENV *main_top_env;
149	static HV *coro_state_stash, *coro_stash;	113	static HV *coro_state_stash, *coro_stash;
150	static volatile SV *coro_mortal; /* will be freed after next transfer */	114	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
		115
		116	static AV *av_destroy; /* destruction queue */
		117	static SV *sv_manager; /* the manager coro */
		118	static SV *sv_idle; /* $Coro::idle */
151		119
152	static GV *irsgv; /* $/ */	120	static GV *irsgv; /* $/ */
153	static GV *stdoutgv; /* *STDOUT */	121	static GV *stdoutgv; /* *STDOUT */
154	static SV *rv_diehook;	122	static SV *rv_diehook;
155	static SV *rv_warnhook;	123	static SV *rv_warnhook;
156	static HV *hv_sig; /* %SIG */	124	static HV *hv_sig; /* %SIG */
157		125
158	/* async_pool helper stuff */	126	/* async_pool helper stuff */
159	static SV *sv_pool_rss;	127	static SV *sv_pool_rss;
160	static SV *sv_pool_size;	128	static SV *sv_pool_size;
		129	static SV *sv_async_pool_idle; /* description string */
161	static AV *av_async_pool;	130	static AV *av_async_pool; /* idle pool */
		131	static SV *sv_Coro; /* class string */
		132	static CV *cv_pool_handler;
		133
		134	/* Coro::AnyEvent */
		135	static SV *sv_activity;
		136
		137	/* enable processtime/realtime profiling */
		138	static char enable_times;
		139	typedef U32 coro_ts[2];
		140	static coro_ts time_real, time_cpu;
		141	static char times_valid;
162		142
163	static struct coro_cctx *cctx_first;	143	static struct coro_cctx *cctx_first;
164	static int cctx_count, cctx_idle;	144	static int cctx_count, cctx_idle;
165		145
166	enum {	146	enum
		147	{
167	CC_MAPPED = 0x01,	148	CC_MAPPED = 0x01,
168	CC_NOREUSE = 0x02, /* throw this away after tracing */	149	CC_NOREUSE = 0x02, /* throw this away after tracing */
169	CC_TRACE = 0x04,	150	CC_TRACE = 0x04,
170	CC_TRACE_SUB = 0x08, /* trace sub calls */	151	CC_TRACE_SUB = 0x08, /* trace sub calls */
171	CC_TRACE_LINE = 0x10, /* trace each statement */	152	CC_TRACE_LINE = 0x10, /* trace each statement */
172	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173	};	154	};
174		155
175	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
176	typedef struct coro_cctx {	157	typedef struct coro_cctx
		158	{
177	struct coro_cctx *next;	159	struct coro_cctx *next;
178		160
179	/* the stack */	161	/* the stack */
180	void *sptr;	162	struct coro_stack stack;
181	size_t ssize;
182		163
183	/* cpu state */	164	/* cpu state */
184	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	#ifndef NDEBUG
185	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	167	JMPENV *idle_te; /* same as idle_sp, but for top_env */
		168	#endif
186	JMPENV *top_env;	169	JMPENV *top_env;
187	coro_context cctx;	170	coro_context cctx;
188		171
		172	U32 gen;
189	#if CORO_USE_VALGRIND	173	#if CORO_USE_VALGRIND
190	int valgrind_id;	174	int valgrind_id;
191	#endif	175	#endif
192	unsigned char flags;	176	unsigned char flags;
193	} coro_cctx;	177	} coro_cctx;
194		178
		179	static coro_cctx *cctx_current; /* the currently running cctx */
		180
		181	/*****************************************************************************/
		182
		183	static MGVTBL coro_state_vtbl;
		184
195	enum {	185	enum
		186	{
196	CF_RUNNING = 0x0001, /* coroutine is running */	187	CF_RUNNING = 0x0001, /* coroutine is running */
197	CF_READY = 0x0002, /* coroutine is ready */	188	CF_READY = 0x0002, /* coroutine is ready */
198	CF_NEW = 0x0004, /* has never been switched to */	189	CF_NEW = 0x0004, /* has never been switched to */
199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	190	CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
		191	CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
		192	CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
200	};	193	};
201		194
202	/* the structure where most of the perl state is stored, overlaid on the cxstack */	195	/* the structure where most of the perl state is stored, overlaid on the cxstack */
203	typedef struct {	196	typedef struct
204	SV *defsv;	197	{
205	AV *defav;
206	SV *errsv;
207	SV *irsgv;
208	#define VAR(name,type) type name;	198	#define VARx(name,expr,type) type name;
209	# include "state.h"	199	#include "state.h"
210	#undef VAR
211	} perl_slots;	200	} perl_slots;
212		201
		202	/* how many context stack entries do we need for perl_slots */
213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	203	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214		204
215	/* this is a structure representing a perl-level coroutine */	205	/* this is a structure representing a perl-level coroutine */
216	struct coro {	206	struct coro
		207	{
217	/* the c coroutine allocated to this perl coroutine, if any */	208	/* the C coroutine allocated to this perl coroutine, if any */
218	coro_cctx *cctx;	209	coro_cctx *cctx;
219		210
220	/* process data */	211	/* ready queue */
		212	struct coro *next_ready;
		213
		214	/* state data */
		215	struct CoroSLF slf_frame; /* saved slf frame */
221	AV *mainstack;	216	AV *mainstack;
222	perl_slots *slot; /* basically the saved sp */	217	perl_slots *slot; /* basically the saved sp */
223		218
		219	CV *startcv; /* the CV to execute */
224	AV *args; /* data associated with this coroutine (initial args) */	220	AV *args; /* data associated with this coroutine (initial args) */
225	int refcnt; /* coroutines are refcounted, yes */
226	int flags; /* CF_ flags */	221	int flags; /* CF_ flags */
227	HV *hv; /* the perl hash associated with this coro, if any */	222	HV *hv; /* the perl hash associated with this coro, if any */
228		223
229	/* statistics */	224	/* statistics */
230	int usecount; /* number of transfers to this coro */	225	int usecount; /* number of transfers to this coro */
231		226
232	/* coro process data */	227	/* coro process data */
233	int prio;	228	int prio;
234	SV *throw; /* exception to be thrown */	229	SV *except; /* exception to be thrown */
		230	SV *rouse_cb; /* last rouse callback */
		231	AV *on_destroy; /* callbacks or coros to notify on destroy */
		232	AV *status; /* the exit status list */
235		233
236	/* async_pool */	234	/* async_pool */
237	SV *saved_deffh;	235	SV *saved_deffh;
		236	SV *invoke_cb;
		237	AV *invoke_av;
		238
		239	/* on_enter/on_leave */
		240	AV *on_enter;
		241	AV *on_leave;
		242
		243	/* swap_sv */
		244	AV *swap_sv;
		245
		246	/* times */
		247	coro_ts t_cpu, t_real;
238		248
239	/* linked list */	249	/* linked list */
240	struct coro *next, *prev;	250	struct coro *next, *prev;
241	};	251	};
242		252
243	typedef struct coro *Coro__State;	253	typedef struct coro *Coro__State;
244	typedef struct coro *Coro__State_or_hashref;	254	typedef struct coro *Coro__State_or_hashref;
245		255
		256	/* the following variables are effectively part of the perl context */
		257	/* and get copied between struct coro and these variables */
		258	/* the main reason we don't support windows process emulation */
		259	static struct CoroSLF slf_frame; /* the current slf frame */
		260
246	/** Coro ********************************************************************/	261	/** Coro ********************************************************************/
247		262
248	#define PRIO_MAX 3	263	#define CORO_PRIO_MAX 3
249	#define PRIO_HIGH 1	264	#define CORO_PRIO_HIGH 1
250	#define PRIO_NORMAL 0	265	#define CORO_PRIO_NORMAL 0
251	#define PRIO_LOW -1	266	#define CORO_PRIO_LOW -1
252	#define PRIO_IDLE -3	267	#define CORO_PRIO_IDLE -3
253	#define PRIO_MIN -4	268	#define CORO_PRIO_MIN -4
254		269
255	/* for Coro.pm */	270	/* for Coro.pm */
256	static SV *coro_current;	271	static SV *coro_current;
257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	272	static SV *coro_readyhook;
258	static int coro_nready;	273	static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
		274	static CV *cv_coro_run;
259	static struct coro *coro_first;	275	static struct coro *coro_first;
		276	#define coro_nready coroapi.nready
		277
		278	/** JIT *********************************************************************/
		279
		280	#if CORO_JIT
		281	/* APPLE doesn't have mmap though */
		282	#define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
		283	#ifndef CORO_JIT_TYPE
		284	#if ECB_AMD64 && CORO_JIT_UNIXY
		285	#define CORO_JIT_TYPE "amd64-unix"
		286	#elif __i386 && CORO_JIT_UNIXY
		287	#define CORO_JIT_TYPE "x86-unix"
		288	#endif
		289	#endif
		290	#endif
		291
		292	#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
		293	#undef CORO_JIT
		294	#endif
		295
		296	#if CORO_JIT
		297	typedef void (*load_save_perl_slots_type)(perl_slots *);
		298	static load_save_perl_slots_type load_perl_slots, save_perl_slots;
		299	#endif
		300
		301	/** Coro::Select ************************************************************/
		302
		303	static OP *(*coro_old_pp_sselect) (pTHX);
		304	static SV *coro_select_select;
		305
		306	/* horrible hack, but if it works... */
		307	static OP *
		308	coro_pp_sselect (pTHX)
		309	{
		310	dSP;
		311	PUSHMARK (SP - 4); /* fake argument list */
		312	XPUSHs (coro_select_select);
		313	PUTBACK;
		314
		315	/* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
		316	PL_op->op_flags |= OPf_STACKED;
		317	PL_op->op_private = 0;
		318	return PL_ppaddr [OP_ENTERSUB](aTHX);
		319	}
		320
		321	/** time stuff **************************************************************/
		322
		323	#ifdef HAS_GETTIMEOFDAY
		324
		325	ecb_inline void
		326	coro_u2time (pTHX_ UV ret[2])
		327	{
		328	struct timeval tv;
		329	gettimeofday (&tv, 0);
		330
		331	ret [0] = tv.tv_sec;
		332	ret [1] = tv.tv_usec;
		333	}
		334
		335	ecb_inline double
		336	coro_nvtime (void)
		337	{
		338	struct timeval tv;
		339	gettimeofday (&tv, 0);
		340
		341	return tv.tv_sec + tv.tv_usec * 1e-6;
		342	}
		343
		344	ecb_inline void
		345	time_init (pTHX)
		346	{
		347	nvtime = coro_nvtime;
		348	u2time = coro_u2time;
		349	}
		350
		351	#else
		352
		353	ecb_inline void
		354	time_init (pTHX)
		355	{
		356	SV **svp;
		357
		358	require_pv ("Time/HiRes.pm");
		359
		360	svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		361
		362	if (!svp) croak ("Time::HiRes is required, but missing. Caught");
		363	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
		364
		365	nvtime = INT2PTR (double (*)(), SvIV (*svp));
		366
		367	svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
		368	u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
		369	}
		370
		371	#endif
260		372
261	/** lowlevel stuff **********************************************************/	373	/** lowlevel stuff **********************************************************/
262		374
263	static SV *	375	static SV * ecb_noinline
264	coro_get_sv (pTHX_ const char *name, int create)	376	coro_get_sv (pTHX_ const char *name, int create)
265	{	377	{
266	#if PERL_VERSION_ATLEAST (5,9,0)	378	#if PERL_VERSION_ATLEAST (5,10,0)
267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */	379	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
268	get_sv (name, create);	380	get_sv (name, create);
269	#endif	381	#endif
270	return get_sv (name, create);	382	return get_sv (name, create);
271	}	383	}
272		384
273	static AV *	385	static AV * ecb_noinline
274	coro_get_av (pTHX_ const char *name, int create)	386	coro_get_av (pTHX_ const char *name, int create)
275	{	387	{
276	#if PERL_VERSION_ATLEAST (5,9,0)	388	#if PERL_VERSION_ATLEAST (5,10,0)
277	/* silence stupid and wrong 5.10 warning that I am unable to switch off */	389	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
278	get_av (name, create);	390	get_av (name, create);
279	#endif	391	#endif
280	return get_av (name, create);	392	return get_av (name, create);
281	}	393	}
282		394
283	static HV *	395	static HV * ecb_noinline
284	coro_get_hv (pTHX_ const char *name, int create)	396	coro_get_hv (pTHX_ const char *name, int create)
285	{	397	{
286	#if PERL_VERSION_ATLEAST (5,9,0)	398	#if PERL_VERSION_ATLEAST (5,10,0)
287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */	399	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
288	get_hv (name, create);	400	get_hv (name, create);
289	#endif	401	#endif
290	return get_hv (name, create);	402	return get_hv (name, create);
291	}	403	}
292		404
293	static AV *	405	ecb_inline void
		406	coro_times_update (void)
		407	{
		408	#ifdef coro_clock_gettime
		409	struct timespec ts;
		410
		411	ts.tv_sec = ts.tv_nsec = 0;
		412	coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
		413	time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
		414
		415	ts.tv_sec = ts.tv_nsec = 0;
		416	coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
		417	time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
		418	#else
		419	dTHX;
		420	UV tv[2];
		421
		422	u2time (aTHX_ tv);
		423	time_real [0] = tv [0];
		424	time_real [1] = tv [1] * 1000;
		425	#endif
		426	}
		427
		428	ecb_inline void
		429	coro_times_add (struct coro *c)
		430	{
		431	c->t_real [1] += time_real [1];
		432	if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
		433	c->t_real [0] += time_real [0];
		434
		435	c->t_cpu [1] += time_cpu [1];
		436	if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
		437	c->t_cpu [0] += time_cpu [0];
		438	}
		439
		440	ecb_inline void
		441	coro_times_sub (struct coro *c)
		442	{
		443	if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
		444	c->t_real [1] -= time_real [1];
		445	c->t_real [0] -= time_real [0];
		446
		447	if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
		448	c->t_cpu [1] -= time_cpu [1];
		449	c->t_cpu [0] -= time_cpu [0];
		450	}
		451
		452	/*****************************************************************************/
		453	/* magic glue */
		454
		455	#define CORO_MAGIC_type_cv 26
		456	#define CORO_MAGIC_type_state PERL_MAGIC_ext
		457
		458	#define CORO_MAGIC_NN(sv, type) \
		459	(ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
		460	? SvMAGIC (sv) \
		461	: mg_find (sv, type))
		462
		463	#define CORO_MAGIC(sv, type) \
		464	(ecb_expect_true (SvMAGIC (sv)) \
		465	? CORO_MAGIC_NN (sv, type) \
		466	: 0)
		467
		468	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		469	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
		470
		471	ecb_inline MAGIC *
		472	SvSTATEhv_p (pTHX_ SV *coro)
		473	{
		474	MAGIC *mg;
		475
		476	if (ecb_expect_true (
		477	SvTYPE (coro) == SVt_PVHV
		478	&& (mg = CORO_MAGIC_state (coro))
		479	&& mg->mg_virtual == &coro_state_vtbl
		480	))
		481	return mg;
		482
		483	return 0;
		484	}
		485
		486	ecb_inline struct coro *
		487	SvSTATE_ (pTHX_ SV *coro)
		488	{
		489	MAGIC *mg;
		490
		491	if (SvROK (coro))
		492	coro = SvRV (coro);
		493
		494	mg = SvSTATEhv_p (aTHX_ coro);
		495	if (!mg)
		496	croak ("Coro::State object required");
		497
		498	return (struct coro *)mg->mg_ptr;
		499	}
		500
		501	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		502
		503	/* faster than SvSTATE, but expects a coroutine hv */
		504	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		505	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
		506
		507	/*****************************************************************************/
		508	/* padlist management and caching */
		509
		510	ecb_inline PADLIST *
294	coro_clone_padlist (pTHX_ CV *cv)	511	coro_derive_padlist (pTHX_ CV *cv)
295	{	512	{
296	AV *padlist = CvPADLIST (cv);	513	PADLIST *padlist = CvPADLIST (cv);
297	AV *newpadlist, *newpad;	514	PADLIST *newpadlist;
		515	PAD *newpad;
		516	PADOFFSET const off = PadlistMAX (padlist) + 1;
298		517
299	newpadlist = newAV ();	518	newPADLIST(newpadlist);
		519	#if !PERL_VERSION_ATLEAST(5,15,3)
		520	/* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
300	AvREAL_off (newpadlist);	521	AvREAL_off (newpadlist);
		522	#endif
301	#if PERL_VERSION_ATLEAST (5,9,0)	523	#if PERL_VERSION_ATLEAST (5,10,0)
302	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	524	Perl_pad_push (aTHX_ padlist, off);
303	#else	525	#else
304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	526	Perl_pad_push (aTHX_ padlist, off, 1);
305	#endif	527	#endif
306	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	528	newpad = PadlistARRAY (padlist)[off];
307	--AvFILLp (padlist);	529	PadlistMAX (padlist) = off - 1;
308		530
309	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	531	/* Already extended to 2 elements by newPADLIST. */
310	av_store (newpadlist, 1, (SV *)newpad);	532	PadlistMAX (newpadlist) = 1;
		533	PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
		534	PadlistARRAY (newpadlist)[1] = newpad;
311		535
312	return newpadlist;	536	return newpadlist;
313	}	537	}
314		538
315	static void	539	ecb_inline void
316	free_padlist (pTHX_ AV *padlist)	540	free_padlist (pTHX_ PADLIST *padlist)
317	{	541	{
318	/* may be during global destruction */	542	/* may be during global destruction */
319	if (SvREFCNT (padlist))	543	if (!IN_DESTRUCT)
320	{	544	{
321	I32 i = AvFILLp (padlist);	545	I32 i = PadlistMAX (padlist);
322	while (i >= 0)	546
		547	while (i > 0) /* special-case index 0 */
323	{	548	{
324	SV **svp = av_fetch (padlist, i--, FALSE);	549	/* we try to be extra-careful here */
325	if (svp)	550	PAD *pad = PadlistARRAY (padlist)[i--];
326	{	551	I32 j = PadMAX (pad);
327	SV *sv;
328	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
329	SvREFCNT_dec (sv);
330		552
		553	while (j >= 0)
		554	SvREFCNT_dec (PadARRAY (pad)[j--]);
		555
		556	PadMAX (pad) = -1;
331	SvREFCNT_dec (*svp);	557	SvREFCNT_dec (pad);
332	}
333	}	558	}
334		559
		560	SvREFCNT_dec (PadlistNAMES (padlist));
		561
		562	#ifdef NEWPADAPI
		563	Safefree (PadlistARRAY (padlist));
		564	Safefree (padlist);
		565	#else
		566	AvFILLp (padlist) = -1;
		567	AvREAL_off (padlist);
335	SvREFCNT_dec ((SV*)padlist);	568	SvREFCNT_dec ((SV*)padlist);
		569	#endif
336	}	570	}
337	}	571	}
338		572
339	static int	573	static int
340	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	574	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
341	{	575	{
342	AV *padlist;	576	PADLIST *padlist;
343	AV *av = (AV *)mg->mg_obj;	577	PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
		578	size_t len = *(size_t *)mg->mg_ptr;
344		579
345	/* casting is fun. */	580	/* perl manages to free our internal AV and _then_ call us */
346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	581	if (IN_DESTRUCT)
		582	return 0;
		583
		584	while (len--)
347	free_padlist (aTHX_ padlist);	585	free_padlist (aTHX_ padlists[len]);
348		586
349	return 0;	587	return 0;
350	}	588	}
351
352	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
353	#define CORO_MAGIC_type_state PERL_MAGIC_ext
354		589
355	static MGVTBL coro_cv_vtbl = {	590	static MGVTBL coro_cv_vtbl = {
356	0, 0, 0, 0,	591	0, 0, 0, 0,
357	coro_cv_free	592	coro_cv_free
358	};	593	};
359		594
360	#define CORO_MAGIC(sv,type) \
361	SvMAGIC (sv) \
362	? SvMAGIC (sv)->mg_type == type \
363	? SvMAGIC (sv) \
364	: mg_find (sv, type) \
365	: 0
366
367	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
369
370	static struct coro *
371	SvSTATE_ (pTHX_ SV *coro)
372	{
373	HV *stash;
374	MAGIC *mg;
375
376	if (SvROK (coro))
377	coro = SvRV (coro);
378
379	if (expect_false (SvTYPE (coro) != SVt_PVHV))
380	croak ("Coro::State object required");
381
382	stash = SvSTASH (coro);
383	if (expect_false (stash != coro_stash && stash != coro_state_stash))
384	{
385	/* very slow, but rare, check */
386	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
387	croak ("Coro::State object required");
388	}
389
390	mg = CORO_MAGIC_state (coro);
391	return (struct coro *)mg->mg_ptr;
392	}
393
394	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
395
396	/* the next two functions merely cache the padlists */	595	/* the next two functions merely cache the padlists */
397	static void	596	ecb_inline void
398	get_padlist (pTHX_ CV *cv)	597	get_padlist (pTHX_ CV *cv)
399	{	598	{
400	MAGIC *mg = CORO_MAGIC_cv (cv);	599	MAGIC *mg = CORO_MAGIC_cv (cv);
401	AV *av;	600	size_t *lenp;
402		601
403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))	602	if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	603	CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
405	else	604	else
406	{	605	{
407	#if CORO_PREFER_PERL_FUNCTIONS	606	#if CORO_PREFER_PERL_FUNCTIONS
408	/* this is probably cleaner, but also slower? */	607	/* this is probably cleaner? but also slower! */
		608	/* in practise, it seems to be less stable */
409	CV *cp = Perl_cv_clone (cv);	609	CV *cp = Perl_cv_clone (aTHX_ cv);
410	CvPADLIST (cv) = CvPADLIST (cp);	610	CvPADLIST (cv) = CvPADLIST (cp);
411	CvPADLIST (cp) = 0;	611	CvPADLIST (cp) = 0;
412	SvREFCNT_dec (cp);	612	SvREFCNT_dec (cp);
413	#else	613	#else
414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	614	CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
415	#endif	615	#endif
416	}	616	}
417	}	617	}
418		618
419	static void	619	ecb_inline void
420	put_padlist (pTHX_ CV *cv)	620	put_padlist (pTHX_ CV *cv)
421	{	621	{
422	MAGIC *mg = CORO_MAGIC_cv (cv);	622	MAGIC *mg = CORO_MAGIC_cv (cv);
423	AV *av;
424		623
425	if (expect_false (!mg))	624	if (ecb_expect_false (!mg))
		625	{
426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);	626	mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
		627	Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
		628	mg->mg_len = 1; /* so mg_free frees mg_ptr */
		629	}
		630	else
		631	Renew (mg->mg_ptr,
		632	sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
		633	char);
427		634
428	av = (AV *)mg->mg_obj;	635	((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
429
430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
431	av_extend (av, AvMAX (av) + 1);
432
433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
434	}	636	}
435		637
436	/** load & save, init *******************************************************/	638	/** load & save, init *******************************************************/
		639
		640	ecb_inline void
		641	swap_sv (SV *a, SV *b)
		642	{
		643	const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
		644	SV tmp;
		645
		646	/* swap sv_any */
		647	SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
		648
		649	/* swap sv_flags */
		650	SvFLAGS (&tmp) = SvFLAGS (a);
		651	SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
		652	SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
		653
		654	#if PERL_VERSION_ATLEAST (5,10,0)
		655	/* perl 5.10 and later complicates this _quite_ a bit, but it also
		656	* is much faster, so no quarrels here. alternatively, we could
		657	* sv_upgrade to avoid this.
		658	*/
		659	{
		660	/* swap sv_u */
		661	tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
		662
		663	/* if SvANY points to the head, we need to adjust the pointers,
		664	* as the pointer for a still points to b, and maybe vice versa.
		665	*/
		666	#define svany_in_head(type) \
		667	(((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
		668
		669	if (svany_in_head (SvTYPE (a)))
		670	SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
		671
		672	if (svany_in_head (SvTYPE (b)))
		673	SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
		674	}
		675	#endif
		676	}
		677
		678	/* swap sv heads, at least logically */
		679	static void
		680	swap_svs (pTHX_ Coro__State c)
		681	{
		682	int i;
		683
		684	for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
		685	swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
		686	}
		687
		688	#define SWAP_SVS(coro) \
		689	if (ecb_expect_false ((coro)->swap_sv)) \
		690	swap_svs (aTHX_ (coro))
		691
		692	static void
		693	on_enterleave_call (pTHX_ SV *cb);
437		694
438	static void	695	static void
439	load_perl (pTHX_ Coro__State c)	696	load_perl (pTHX_ Coro__State c)
440	{	697	{
441	perl_slots *slot = c->slot;	698	perl_slots *slot = c->slot;
442	c->slot = 0;	699	c->slot = 0;
443		700
444	PL_mainstack = c->mainstack;	701	PL_mainstack = c->mainstack;
445		702
446	GvSV (PL_defgv) = slot->defsv;	703	#if CORO_JIT
447	GvAV (PL_defgv) = slot->defav;	704	load_perl_slots (slot);
448	GvSV (PL_errgv) = slot->errsv;	705	#else
449	GvSV (irsgv) = slot->irsgv;
450
451	#define VAR(name,type) PL_ ## name = slot->name;	706	#define VARx(name,expr,type) expr = slot->name;
452	# include "state.h"	707	#include "state.h"
453	#undef VAR	708	#endif
454		709
455	{	710	{
456	dSP;	711	dSP;
457		712
458	CV *cv;	713	CV *cv;
459		714
460	/* now do the ugly restore mess */	715	/* now do the ugly restore mess */
461	while (expect_true (cv = (CV *)POPs))	716	while (ecb_expect_true (cv = (CV *)POPs))
462	{	717	{
463	put_padlist (aTHX_ cv); /* mark this padlist as available */	718	put_padlist (aTHX_ cv); /* mark this padlist as available */
464	CvDEPTH (cv) = PTR2IV (POPs);	719	CvDEPTH (cv) = PTR2IV (POPs);
465	CvPADLIST (cv) = (AV *)POPs;	720	CvPADLIST (cv) = (PADLIST *)POPs;
466	}	721	}
467		722
468	PUTBACK;	723	PUTBACK;
469	}	724	}
		725
		726	slf_frame = c->slf_frame;
		727	CORO_THROW = c->except;
		728
		729	if (ecb_expect_false (enable_times))
		730	{
		731	if (ecb_expect_false (!times_valid))
		732	coro_times_update ();
		733
		734	coro_times_sub (c);
		735	}
		736
		737	if (ecb_expect_false (c->on_enter))
		738	{
		739	int i;
		740
		741	for (i = 0; i <= AvFILLp (c->on_enter); ++i)
		742	on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
		743	}
		744
		745	SWAP_SVS (c);
470	}	746	}
471		747
472	static void	748	static void
473	save_perl (pTHX_ Coro__State c)	749	save_perl (pTHX_ Coro__State c)
474	{	750	{
		751	SWAP_SVS (c);
		752
		753	if (ecb_expect_false (c->on_leave))
		754	{
		755	int i;
		756
		757	for (i = AvFILLp (c->on_leave); i >= 0; --i)
		758	on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
		759	}
		760
		761	times_valid = 0;
		762
		763	if (ecb_expect_false (enable_times))
		764	{
		765	coro_times_update (); times_valid = 1;
		766	coro_times_add (c);
		767	}
		768
		769	c->except = CORO_THROW;
		770	c->slf_frame = slf_frame;
		771
475	{	772	{
476	dSP;	773	dSP;
477	I32 cxix = cxstack_ix;	774	I32 cxix = cxstack_ix;
478	PERL_CONTEXT *ccstk = cxstack;	775	PERL_CONTEXT *ccstk = cxstack;
479	PERL_SI *top_si = PL_curstackinfo;	776	PERL_SI *top_si = PL_curstackinfo;
…		…
485		782
486	XPUSHs (Nullsv);	783	XPUSHs (Nullsv);
487	/* this loop was inspired by pp_caller */	784	/* this loop was inspired by pp_caller */
488	for (;;)	785	for (;;)
489	{	786	{
490	while (expect_true (cxix >= 0))	787	while (ecb_expect_true (cxix >= 0))
491	{	788	{
492	PERL_CONTEXT *cx = &ccstk[cxix--];	789	PERL_CONTEXT *cx = &ccstk[cxix--];
493		790
494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))	791	if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
495	{	792	{
496	CV *cv = cx->blk_sub.cv;	793	CV *cv = cx->blk_sub.cv;
497		794
498	if (expect_true (CvDEPTH (cv)))	795	if (ecb_expect_true (CvDEPTH (cv)))
499	{	796	{
500	EXTEND (SP, 3);	797	EXTEND (SP, 3);
501	PUSHs ((SV *)CvPADLIST (cv));	798	PUSHs ((SV *)CvPADLIST (cv));
502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	799	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
503	PUSHs ((SV *)cv);	800	PUSHs ((SV *)cv);
504		801
505	CvDEPTH (cv) = 0;	802	CvDEPTH (cv) = 0;
506	get_padlist (aTHX_ cv);	803	get_padlist (aTHX_ cv);
507	}	804	}
508	}	805	}
509	}	806	}
510		807
511	if (expect_true (top_si->si_type == PERLSI_MAIN))	808	if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
512	break;	809	break;
513		810
514	top_si = top_si->si_prev;	811	top_si = top_si->si_prev;
515	ccstk = top_si->si_cxstack;	812	ccstk = top_si->si_cxstack;
516	cxix = top_si->si_cxix;	813	cxix = top_si->si_cxix;
…		…
518		815
519	PUTBACK;	816	PUTBACK;
520	}	817	}
521		818
522	/* allocate some space on the context stack for our purposes */	819	/* allocate some space on the context stack for our purposes */
523	/* we manually unroll here, as usually 2 slots is enough */	820	if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
524	if (SLOT_COUNT >= 1) CXINC;
525	if (SLOT_COUNT >= 2) CXINC;
526	if (SLOT_COUNT >= 3) CXINC;
527	{	821	{
528	int i;	822	unsigned int i;
		823
529	for (i = 3; i < SLOT_COUNT; ++i)	824	for (i = 0; i < SLOT_COUNT; ++i)
530	CXINC;	825	CXINC;
531	}	826
532	cxstack_ix -= SLOT_COUNT; /* undo allocation */	827	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		828	}
533		829
534	c->mainstack = PL_mainstack;	830	c->mainstack = PL_mainstack;
535		831
536	{	832	{
537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);	833	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
538		834
539	slot->defav = GvAV (PL_defgv);	835	#if CORO_JIT
540	slot->defsv = DEFSV;	836	save_perl_slots (slot);
541	slot->errsv = ERRSV;	837	#else
542	slot->irsgv = GvSV (irsgv);
543
544	#define VAR(name,type) slot->name = PL_ ## name;	838	#define VARx(name,expr,type) slot->name = expr;
545	# include "state.h"	839	#include "state.h"
546	#undef VAR	840	#endif
547	}	841	}
548	}	842	}
549		843
550	/*	844	/*
551	* allocate various perl stacks. This is an exact copy	845	* allocate various perl stacks. This is almost an exact copy
552	* of perl.c:init_stacks, except that it uses less memory	846	* of perl.c:init_stacks, except that it uses less memory
553	* on the (sometimes correct) assumption that coroutines do	847	* on the (sometimes correct) assumption that coroutines do
554	* not usually need a lot of stackspace.	848	* not usually need a lot of stackspace.
555	*/	849	*/
556	#if CORO_PREFER_PERL_FUNCTIONS	850	#if CORO_PREFER_PERL_FUNCTIONS
557	# define coro_init_stacks init_stacks	851	# define coro_init_stacks(thx) init_stacks ()
558	#else	852	#else
559	static void	853	static void
560	coro_init_stacks (pTHX)	854	coro_init_stacks (pTHX)
561	{	855	{
562	PL_curstackinfo = new_stackinfo(32, 8);	856	PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
563	PL_curstackinfo->si_type = PERLSI_MAIN;	857	PL_curstackinfo->si_type = PERLSI_MAIN;
564	PL_curstack = PL_curstackinfo->si_stack;	858	PL_curstack = PL_curstackinfo->si_stack;
565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	859	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
566		860
567	PL_stack_base = AvARRAY(PL_curstack);	861	PL_stack_base = AvARRAY(PL_curstack);
…		…
582	#endif	876	#endif
583		877
584	New(54,PL_scopestack,8,I32);	878	New(54,PL_scopestack,8,I32);
585	PL_scopestack_ix = 0;	879	PL_scopestack_ix = 0;
586	PL_scopestack_max = 8;	880	PL_scopestack_max = 8;
		881	#if HAS_SCOPESTACK_NAME
		882	New(54,PL_scopestack_name,8,const char*);
		883	#endif
587		884
588	New(54,PL_savestack,24,ANY);	885	New(54,PL_savestack,24,ANY);
589	PL_savestack_ix = 0;	886	PL_savestack_ix = 0;
590	PL_savestack_max = 24;	887	PL_savestack_max = 24;
591		888
592	#if !PERL_VERSION_ATLEAST (5,9,0)	889	#if !PERL_VERSION_ATLEAST (5,10,0)
593	New(54,PL_retstack,4,OP*);	890	New(54,PL_retstack,4,OP*);
594	PL_retstack_ix = 0;	891	PL_retstack_ix = 0;
595	PL_retstack_max = 4;	892	PL_retstack_max = 4;
596	#endif	893	#endif
597	}	894	}
…		…
599		896
600	/*	897	/*
601	* destroy the stacks, the callchain etc...	898	* destroy the stacks, the callchain etc...
602	*/	899	*/
603	static void	900	static void
604	coro_destroy_stacks (pTHX)	901	coro_destruct_stacks (pTHX)
605	{	902	{
606	while (PL_curstackinfo->si_next)	903	while (PL_curstackinfo->si_next)
607	PL_curstackinfo = PL_curstackinfo->si_next;	904	PL_curstackinfo = PL_curstackinfo->si_next;
608		905
609	while (PL_curstackinfo)	906	while (PL_curstackinfo)
…		…
619	}	916	}
620		917
621	Safefree (PL_tmps_stack);	918	Safefree (PL_tmps_stack);
622	Safefree (PL_markstack);	919	Safefree (PL_markstack);
623	Safefree (PL_scopestack);	920	Safefree (PL_scopestack);
		921	#if HAS_SCOPESTACK_NAME
		922	Safefree (PL_scopestack_name);
		923	#endif
624	Safefree (PL_savestack);	924	Safefree (PL_savestack);
625	#if !PERL_VERSION_ATLEAST (5,9,0)	925	#if !PERL_VERSION_ATLEAST (5,10,0)
626	Safefree (PL_retstack);	926	Safefree (PL_retstack);
627	#endif	927	#endif
628	}	928	}
629		929
		930	#define CORO_RSS \
		931	rss += sizeof (SYM (curstackinfo)); \
		932	rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
		933	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
		934	rss += SYM (tmps_max) * sizeof (SV *); \
		935	rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
		936	rss += SYM (scopestack_max) * sizeof (I32); \
		937	rss += SYM (savestack_max) * sizeof (ANY);
		938
630	static size_t	939	static size_t
631	coro_rss (pTHX_ struct coro *coro)	940	coro_rss (pTHX_ struct coro *coro)
632	{	941	{
633	size_t rss = sizeof (*coro);	942	size_t rss = sizeof (*coro);
634		943
635	if (coro->mainstack)	944	if (coro->mainstack)
636	{	945	{
637	perl_slots tmp_slot;
638	perl_slots *slot;
639
640	if (coro->flags & CF_RUNNING)	946	if (coro->flags & CF_RUNNING)
641	{	947	{
642	slot = &tmp_slot;	948	#define SYM(sym) PL_ ## sym
643		949	CORO_RSS;
644	#define VAR(name,type) slot->name = PL_ ## name;
645	# include "state.h"
646	#undef VAR	950	#undef SYM
647	}	951	}
648	else	952	else
649	slot = coro->slot;	953	{
		954	#define SYM(sym) coro->slot->sym
		955	CORO_RSS;
		956	#undef SYM
		957	}
		958	}
650		959
651	rss += sizeof (slot->curstackinfo);	960	return rss;
652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	961	}
653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
654	rss += slot->tmps_max * sizeof (SV *);
655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656	rss += slot->scopestack_max * sizeof (I32);
657	rss += slot->savestack_max * sizeof (ANY);
658		962
659	#if !PERL_VERSION_ATLEAST (5,9,0)	963	/** coroutine stack handling ************************************************/
660	rss += slot->retstack_max * sizeof (OP *);	964
		965	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		966	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		967	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		968
		969	/* apparently < 5.8.8 */
		970	#ifndef MgPV_nolen_const
		971	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		972	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		973	(const char*)(mg)->mg_ptr)
661	#endif	974	#endif
662	}
663
664	return rss;
665	}
666
667	/** coroutine stack handling ************************************************/
668
669	#if 0
670	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
671		975
672	/*	976	/*
673	* This overrides the default magic get method of %SIG elements.	977	* This overrides the default magic get method of %SIG elements.
674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook	978	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675	* and instead of tryign to save and restore the hash elements, we just provide	979	* and instead of trying to save and restore the hash elements (extremely slow),
676	* readback here.	980	* we just provide our own readback here.
677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
678	* not expecting this to actually change the hook. This is a potential problem
679	* when a schedule happens then, but we ignore this.
680	*/	981	*/
		982	static int ecb_cold
		983	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		984	{
		985	const char *s = MgPV_nolen_const (mg);
		986
		987	if (*s == '_')
		988	{
		989	SV **svp = 0;
		990
		991	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		992	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		993
		994	if (svp)
		995	{
		996	SV *ssv;
		997
		998	if (!*svp)
		999	ssv = &PL_sv_undef;
		1000	else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
		1001	ssv = sv_2mortal (newRV_inc (*svp));
		1002	else
		1003	ssv = *svp;
		1004
		1005	sv_setsv (sv, ssv);
		1006	return 0;
		1007	}
		1008	}
		1009
		1010	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		1011	}
		1012
		1013	static int ecb_cold
		1014	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		1015	{
		1016	const char *s = MgPV_nolen_const (mg);
		1017
		1018	if (*s == '_')
		1019	{
		1020	SV **svp = 0;
		1021
		1022	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		1023	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		1024
		1025	if (svp)
		1026	{
		1027	SV *old = *svp;
		1028	*svp = 0;
		1029	SvREFCNT_dec (old);
		1030	return 0;
		1031	}
		1032	}
		1033
		1034	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		1035	}
		1036
		1037	static int ecb_cold
		1038	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		1039	{
		1040	const char *s = MgPV_nolen_const (mg);
		1041
		1042	if (*s == '_')
		1043	{
		1044	SV **svp = 0;
		1045
		1046	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		1047	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		1048
		1049	if (svp)
		1050	{
		1051	SV *old = *svp;
		1052	*svp = SvOK (sv) ? newSVsv (sv) : 0;
		1053	SvREFCNT_dec (old);
		1054	return 0;
		1055	}
		1056	}
		1057
		1058	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		1059	}
		1060
		1061	static void
		1062	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		1063	{
		1064	/* kind of mega-hacky, but works */
		1065	ta->next = ta->prev = (struct coro *)ta;
		1066	}
		1067
681	static int	1068	static int
682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)	1069	slf_check_nop (pTHX_ struct CoroSLF *frame)
683	{	1070	{
684	return orig_sigelem_get (aTHX_ sv, mg);	1071	return 0;
685	const char *s = MgPV_nolen_const (mg);
686
687	if (*s == '_')
688	{
689	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
690	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
691	}
692
693	return orig_sigelem_get (aTHX_ sv, mg);
694	}	1072	}
695	#endif
696		1073
697	static void	1074	static int
		1075	slf_check_repeat (pTHX_ struct CoroSLF *frame)
		1076	{
		1077	return 1;
		1078	}
		1079
		1080	static UNOP init_perl_op;
		1081
		1082	ecb_noinline static void /* noinline to keep it out of the transfer fast path */
698	coro_setup (pTHX_ struct coro *coro)	1083	init_perl (pTHX_ struct coro *coro)
699	{	1084	{
700	/*	1085	/*
701	* emulate part of the perl startup here.	1086	* emulate part of the perl startup here.
702	*/	1087	*/
703	coro_init_stacks (aTHX);	1088	coro_init_stacks (aTHX);
704		1089
705	PL_runops = RUNOPS_DEFAULT;	1090	PL_runops = RUNOPS_DEFAULT;
706	PL_curcop = &PL_compiling;	1091	PL_curcop = &PL_compiling;
707	PL_in_eval = EVAL_NULL;	1092	PL_in_eval = EVAL_NULL;
708	PL_comppad = 0;	1093	PL_comppad = 0;
		1094	PL_comppad_name = 0;
		1095	PL_comppad_name_fill = 0;
		1096	PL_comppad_name_floor = 0;
709	PL_curpm = 0;	1097	PL_curpm = 0;
710	PL_curpad = 0;	1098	PL_curpad = 0;
711	PL_localizing = 0;	1099	PL_localizing = 0;
712	PL_dirty = 0;
713	PL_restartop = 0;	1100	PL_restartop = 0;
		1101	#if PERL_VERSION_ATLEAST (5,10,0)
		1102	PL_parser = 0;
		1103	#endif
		1104	PL_hints = 0;
714		1105
715	/* recreate the die/warn hooks */	1106	/* recreate the die/warn hooks */
716	PL_diehook = 0;
717	hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
718	PL_diehook = SvREFCNT_inc (rv_diehook);	1107	PL_diehook = SvREFCNT_inc (rv_diehook);
719
720	PL_warnhook = 0;
721	hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
722	PL_warnhook = SvREFCNT_inc (rv_warnhook);	1108	PL_warnhook = SvREFCNT_inc (rv_warnhook);
723		1109
724	GvSV (PL_defgv) = newSV (0);	1110	GvSV (PL_defgv) = newSV (0);
725	GvAV (PL_defgv) = coro->args; coro->args = 0;	1111	GvAV (PL_defgv) = coro->args; coro->args = 0;
726	GvSV (PL_errgv) = newSV (0);	1112	GvSV (PL_errgv) = newSV (0);
727	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	1113	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		1114	GvHV (PL_hintgv) = 0;
728	PL_rs = newSVsv (GvSV (irsgv));	1115	PL_rs = newSVsv (GvSV (irsgv));
729	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);	1116	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
730		1117
731	{	1118	{
732	dSP;	1119	dSP;
733	LOGOP myop;	1120	UNOP myop;
734		1121
735	Zero (&myop, 1, LOGOP);	1122	Zero (&myop, 1, UNOP);
736	myop.op_next = Nullop;	1123	myop.op_next = Nullop;
		1124	myop.op_type = OP_ENTERSUB;
737	myop.op_flags = OPf_WANT_VOID;	1125	myop.op_flags = OPf_WANT_VOID;
738		1126
739	PUSHMARK (SP);	1127	PUSHMARK (SP);
740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	1128	PUSHs ((SV *)coro->startcv);
741	PUTBACK;	1129	PUTBACK;
742	PL_op = (OP *)&myop;	1130	PL_op = (OP *)&myop;
743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1131	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
744	SPAGAIN;
745	}	1132	}
746		1133
747	/* this newly created coroutine might be run on an existing cctx which most	1134	/* this newly created coroutine might be run on an existing cctx which most
748	* likely was suspended in set_stacklevel, called from entersub.	1135	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
749	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
750	* so we ENTER here for symmetry
751	*/	1136	*/
752	ENTER;	1137	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
753	}	1138	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		1139	slf_frame.destroy = 0;
754		1140
		1141	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		1142	init_perl_op.op_next = PL_op;
		1143	init_perl_op.op_type = OP_ENTERSUB;
		1144	init_perl_op.op_ppaddr = pp_slf;
		1145	/* no flags etc. required, as an init function won't be called */
		1146
		1147	PL_op = (OP *)&init_perl_op;
		1148
		1149	/* copy throw, in case it was set before init_perl */
		1150	CORO_THROW = coro->except;
		1151
		1152	SWAP_SVS (coro);
		1153
		1154	if (ecb_expect_false (enable_times))
		1155	{
		1156	coro_times_update ();
		1157	coro_times_sub (coro);
		1158	}
		1159	}
		1160
755	static void	1161	static void
756	coro_destroy (pTHX_ struct coro *coro)	1162	coro_unwind_stacks (pTHX)
757	{	1163	{
758	if (!IN_DESTRUCT)	1164	if (!IN_DESTRUCT)
759	{	1165	{
760	/* restore all saved variables and stuff */	1166	/* restore all saved variables and stuff */
761	LEAVE_SCOPE (0);	1167	LEAVE_SCOPE (0);
…		…
769	POPSTACK_TO (PL_mainstack);	1175	POPSTACK_TO (PL_mainstack);
770		1176
771	/* unwind main stack */	1177	/* unwind main stack */
772	dounwind (-1);	1178	dounwind (-1);
773	}	1179	}
		1180	}
774		1181
775	SvREFCNT_dec (GvSV (PL_defgv));	1182	static void
776	SvREFCNT_dec (GvAV (PL_defgv));	1183	destroy_perl (pTHX_ struct coro *coro)
777	SvREFCNT_dec (GvSV (PL_errgv));	1184	{
778	SvREFCNT_dec (PL_defoutgv);	1185	SV *svf [9];
779	SvREFCNT_dec (PL_rs);
780	SvREFCNT_dec (GvSV (irsgv));
781		1186
782	SvREFCNT_dec (PL_diehook);
783	SvREFCNT_dec (PL_warnhook);
784		1187	{
		1188	SV *old_current = SvRV (coro_current);
		1189	struct coro *current = SvSTATE (old_current);
		1190
		1191	assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
		1192
		1193	save_perl (aTHX_ current);
		1194
		1195	/* this will cause transfer_check to croak on block*/
		1196	SvRV_set (coro_current, (SV *)coro->hv);
		1197
		1198	load_perl (aTHX_ coro);
		1199
		1200	coro_unwind_stacks (aTHX);
		1201
		1202	/* restore swapped sv's */
		1203	SWAP_SVS (coro);
		1204
		1205	coro_destruct_stacks (aTHX);
		1206
		1207	/* now save some sv's to be free'd later */
		1208	svf [0] = GvSV (PL_defgv);
		1209	svf [1] = (SV *)GvAV (PL_defgv);
		1210	svf [2] = GvSV (PL_errgv);
		1211	svf [3] = (SV *)PL_defoutgv;
		1212	svf [4] = PL_rs;
		1213	svf [5] = GvSV (irsgv);
		1214	svf [6] = (SV *)GvHV (PL_hintgv);
		1215	svf [7] = PL_diehook;
		1216	svf [8] = PL_warnhook;
		1217	assert (9 == sizeof (svf) / sizeof (*svf));
		1218
		1219	SvRV_set (coro_current, old_current);
		1220
		1221	load_perl (aTHX_ current);
		1222	}
		1223
		1224	{
		1225	unsigned int i;
		1226
		1227	for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
		1228	SvREFCNT_dec (svf [i]);
		1229
785	SvREFCNT_dec (coro->saved_deffh);	1230	SvREFCNT_dec (coro->saved_deffh);
786	SvREFCNT_dec (coro->throw);	1231	SvREFCNT_dec (coro->rouse_cb);
787		1232	SvREFCNT_dec (coro->invoke_cb);
788	coro_destroy_stacks (aTHX);	1233	SvREFCNT_dec (coro->invoke_av);
		1234	}
789	}	1235	}
790		1236
791	static void	1237	ecb_inline void
792	free_coro_mortal (pTHX)	1238	free_coro_mortal (pTHX)
793	{	1239	{
794	if (expect_true (coro_mortal))	1240	if (ecb_expect_true (coro_mortal))
795	{	1241	{
796	SvREFCNT_dec (coro_mortal);	1242	SvREFCNT_dec ((SV *)coro_mortal);
797	coro_mortal = 0;	1243	coro_mortal = 0;
798	}	1244	}
799	}	1245	}
800		1246
801	static int	1247	static int
802	runops_trace (pTHX)	1248	runops_trace (pTHX)
803	{	1249	{
804	COP *oldcop = 0;	1250	COP *oldcop = 0;
805	int oldcxix = -2;	1251	int oldcxix = -2;
806	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
807	coro_cctx *cctx = coro->cctx;
808		1252
809	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	1253	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
810	{	1254	{
811	PERL_ASYNC_CHECK ();	1255	PERL_ASYNC_CHECK ();
812		1256
813	if (cctx->flags & CC_TRACE_ALL)	1257	if (cctx_current->flags & CC_TRACE_ALL)
814	{	1258	{
815	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)	1259	if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
816	{	1260	{
817	PERL_CONTEXT *cx = &cxstack[cxstack_ix];	1261	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
818	SV **bot, **top;	1262	SV **bot, **top;
819	AV *av = newAV (); /* return values */	1263	AV *av = newAV (); /* return values */
820	SV **cb;	1264	SV **cb;
…		…
830	: cx->blk_gimme == G_SCALAR ? bot + 1	1274	: cx->blk_gimme == G_SCALAR ? bot + 1
831	: bot;	1275	: bot;
832		1276
833	av_extend (av, top - bot);	1277	av_extend (av, top - bot);
834	while (bot < top)	1278	while (bot < top)
835	av_push (av, SvREFCNT_inc (*bot++));	1279	av_push (av, SvREFCNT_inc_NN (*bot++));
836		1280
837	PL_runops = RUNOPS_DEFAULT;	1281	PL_runops = RUNOPS_DEFAULT;
838	ENTER;	1282	ENTER;
839	SAVETMPS;	1283	SAVETMPS;
840	EXTEND (SP, 3);	1284	EXTEND (SP, 3);
…		…
857		1301
858	if (PL_curcop != &PL_compiling)	1302	if (PL_curcop != &PL_compiling)
859	{	1303	{
860	SV **cb;	1304	SV **cb;
861		1305
862	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)	1306	if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
863	{	1307	{
864	PERL_CONTEXT *cx = &cxstack[cxstack_ix];	1308	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
865		1309
866	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)	1310	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
867	{	1311	{
868	runops_proc_t old_runops = PL_runops;
869	dSP;	1312	dSP;
870	GV *gv = CvGV (cx->blk_sub.cv);	1313	GV *gv = CvGV (cx->blk_sub.cv);
871	SV *fullname = sv_2mortal (newSV (0));	1314	SV *fullname = sv_2mortal (newSV (0));
872		1315
873	if (isGV (gv))	1316	if (isGV (gv))
…		…
878	SAVETMPS;	1321	SAVETMPS;
879	EXTEND (SP, 3);	1322	EXTEND (SP, 3);
880	PUSHMARK (SP);	1323	PUSHMARK (SP);
881	PUSHs (&PL_sv_yes);	1324	PUSHs (&PL_sv_yes);
882	PUSHs (fullname);	1325	PUSHs (fullname);
883	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);	1326	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
884	PUTBACK;	1327	PUTBACK;
885	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);	1328	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
886	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	1329	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
887	SPAGAIN;	1330	SPAGAIN;
888	FREETMPS;	1331	FREETMPS;
…		…
891	}	1334	}
892		1335
893	oldcxix = cxstack_ix;	1336	oldcxix = cxstack_ix;
894	}	1337	}
895		1338
896	if (cctx->flags & CC_TRACE_LINE)	1339	if (cctx_current->flags & CC_TRACE_LINE)
897	{	1340	{
898	dSP;	1341	dSP;
899		1342
900	PL_runops = RUNOPS_DEFAULT;	1343	PL_runops = RUNOPS_DEFAULT;
901	ENTER;	1344	ENTER;
…		…
920		1363
921	TAINT_NOT;	1364	TAINT_NOT;
922	return 0;	1365	return 0;
923	}	1366	}
924		1367
925	/* inject a fake call to Coro::State::_cctx_init into the execution */	1368	static struct CoroSLF cctx_ssl_frame;
926	/* _cctx_init should be careful, as it could be called at almost any time */
927	/* during execution of a perl program */
928	static void NOINLINE
929	cctx_prepare (pTHX_ coro_cctx *cctx)
930	{
931	dSP;
932	LOGOP myop;
933		1369
		1370	static void
		1371	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1372	{
		1373	ta->prev = 0;
		1374	}
		1375
		1376	static int
		1377	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
		1378	{
		1379	*frame = cctx_ssl_frame;
		1380
		1381	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1382	}
		1383
		1384	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
		1385	static void ecb_noinline
		1386	cctx_prepare (pTHX)
		1387	{
934	PL_top_env = &PL_start_env;	1388	PL_top_env = &PL_start_env;
935		1389
936	if (cctx->flags & CC_TRACE)	1390	if (cctx_current->flags & CC_TRACE)
937	PL_runops = runops_trace;	1391	PL_runops = runops_trace;
938		1392
939	Zero (&myop, 1, LOGOP);	1393	/* we already must be executing an SLF op, there is no other valid way
940	myop.op_next = PL_op;	1394	* that can lead to creation of a new cctx */
941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1395	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1396	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
942		1397
943	PUSHMARK (SP);	1398	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
944	EXTEND (SP, 2);	1399	cctx_ssl_frame = slf_frame;
945	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1400
946	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1401	slf_frame.prepare = slf_prepare_set_stacklevel;
947	PUTBACK;	1402	slf_frame.check = slf_check_set_stacklevel;
948	PL_op = (OP *)&myop;	1403	}
949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1404
950	SPAGAIN;	1405	/* the tail of transfer: execute stuff we can only do after a transfer */
		1406	ecb_inline void
		1407	transfer_tail (pTHX)
		1408	{
		1409	free_coro_mortal (aTHX);
		1410	}
		1411
		1412	/* try to exit the same way perl's main function would do */
		1413	/* we do not bother resetting the environment or other things *7
		1414	/* that are not, uhm, essential */
		1415	/* this obviously also doesn't work when perl is embedded */
		1416	static void ecb_noinline ecb_cold
		1417	perlish_exit (pTHX)
		1418	{
		1419	int exitstatus = perl_destruct (PL_curinterp);
		1420	perl_free (PL_curinterp);
		1421	exit (exitstatus);
951	}	1422	}
952		1423
953	/*	1424	/*
954	* this is a _very_ stripped down perl interpreter ;)	1425	* this is a _very_ stripped down perl interpreter ;)
955	*/	1426	*/
956	static void	1427	static void
957	cctx_run (void *arg)	1428	cctx_run (void *arg)
958	{	1429	{
		1430	#ifdef USE_ITHREADS
		1431	# if CORO_PTHREAD
		1432	PERL_SET_CONTEXT (coro_thx);
		1433	# endif
		1434	#endif
		1435	{
959	dTHX;	1436	dTHX;
960		1437
961	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1438	/* normally we would need to skip the entersub here */
962	UNLOCK;	1439	/* not doing so will re-execute it, which is exactly what we want */
963
964	/* we now skip the entersub that lead to transfer() */
965	PL_op = PL_op->op_next;	1440	/* PL_nop = PL_nop->op_next */
966		1441
967	/* inject a fake subroutine call to cctx_init */	1442	/* inject a fake subroutine call to cctx_init */
968	cctx_prepare (aTHX_ (coro_cctx *)arg);	1443	cctx_prepare (aTHX);
969		1444
		1445	/* cctx_run is the alternative tail of transfer() */
		1446	transfer_tail (aTHX);
		1447
970	/* somebody or something will hit me for both perl_run and PL_restartop */	1448	/* somebody or something will hit me for both perl_run and PL_restartop */
971	PL_restartop = PL_op;	1449	PL_restartop = PL_op;
972	perl_run (PL_curinterp);	1450	perl_run (PL_curinterp);
973
974	/*	1451	/*
		1452	* Unfortunately, there is no way to get at the return values of the
		1453	* coro body here, as perl_run destroys these. Likewise, we cannot catch
		1454	* runtime errors here, as this is just a random interpreter, not a thread.
		1455	*/
		1456
		1457	/*
975	* If perl-run returns we assume exit() was being called or the coro	1458	* If perl-run returns we assume exit() was being called or the coro
976	* fell off the end, which seems to be the only valid (non-bug)	1459	* fell off the end, which seems to be the only valid (non-bug)
977	* reason for perl_run to return. We try to exit by jumping to the	1460	* reason for perl_run to return. We try to mimic whatever perl is normally
978	* bootstrap-time "top" top_env, as we cannot restore the "main"	1461	* doing in that case. YMMV.
979	* coroutine as Coro has no such concept
980	*/	1462	*/
981	PL_top_env = main_top_env;	1463	perlish_exit (aTHX);
982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1464	}
983	}	1465	}
984		1466
985	static coro_cctx *	1467	static coro_cctx *
986	cctx_new ()	1468	cctx_new (void)
987	{	1469	{
988	coro_cctx *cctx;	1470	coro_cctx *cctx;
989	void *stack_start;
990	size_t stack_size;
991		1471
992	++cctx_count;	1472	++cctx_count;
993
994	Newz (0, cctx, 1, coro_cctx);	1473	New (0, cctx, 1, coro_cctx);
995		1474
996	#if HAVE_MMAP	1475	cctx->gen = cctx_gen;
997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1476	cctx->flags = 0;
998	/* mmap supposedly does allocate-on-write for us */	1477	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
999	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1000		1478
1001	if (cctx->sptr != (void *)-1)	1479	return cctx;
1002	{	1480	}
1003	# if CORO_STACKGUARD	1481
1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1482	/* create a new cctx only suitable as source */
1005	# endif	1483	static coro_cctx *
1006	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1484	cctx_new_empty (void)
1007	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1485	{
1008	cctx->flags |= CC_MAPPED;	1486	coro_cctx *cctx = cctx_new ();
		1487
		1488	cctx->stack.sptr = 0;
		1489	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1490
		1491	return cctx;
		1492	}
		1493
		1494	/* create a new cctx suitable as destination/running a perl interpreter */
		1495	static coro_cctx *
		1496	cctx_new_run (void)
		1497	{
		1498	coro_cctx *cctx = cctx_new ();
		1499
		1500	if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1009	}	1501	{
1010	else
1011	#endif
1012	{
1013	cctx->ssize = coro_stacksize * (long)sizeof (long);
1014	New (0, cctx->sptr, coro_stacksize, long);
1015
1016	if (!cctx->sptr)
1017	{
1018	perror ("FATAL: unable to allocate stack for coroutine");	1502	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1019	_exit (EXIT_FAILURE);	1503	_exit (EXIT_FAILURE);
1020	}
1021
1022	stack_start = cctx->sptr;
1023	stack_size = cctx->ssize;
1024	}	1504	}
1025		1505
1026	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1027	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1506	coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1028		1507
1029	return cctx;	1508	return cctx;
1030	}	1509	}
1031		1510
1032	static void	1511	static void
1033	cctx_destroy (coro_cctx *cctx)	1512	cctx_destroy (coro_cctx *cctx)
1034	{	1513	{
1035	if (!cctx)	1514	if (!cctx)
1036	return;	1515	return;
1037		1516
		1517	assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
		1518
1038	--cctx_count;	1519	--cctx_count;
		1520	coro_destroy (&cctx->cctx);
1039		1521
1040	#if CORO_USE_VALGRIND	1522	coro_stack_free (&cctx->stack);
1041	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1042	#endif
1043
1044	#if HAVE_MMAP
1045	if (cctx->flags & CC_MAPPED)
1046	munmap (cctx->sptr, cctx->ssize);
1047	else
1048	#endif
1049	Safefree (cctx->sptr);
1050		1523
1051	Safefree (cctx);	1524	Safefree (cctx);
1052	}	1525	}
1053		1526
1054	/* wether this cctx should be destructed */	1527	/* wether this cctx should be destructed */
1055	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))	1528	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1056		1529
1057	static coro_cctx *	1530	static coro_cctx *
1058	cctx_get (pTHX)	1531	cctx_get (pTHX)
1059	{	1532	{
1060	while (expect_true (cctx_first))	1533	while (ecb_expect_true (cctx_first))
1061	{	1534	{
1062	coro_cctx *cctx = cctx_first;	1535	coro_cctx *cctx = cctx_first;
1063	cctx_first = cctx->next;	1536	cctx_first = cctx->next;
1064	--cctx_idle;	1537	--cctx_idle;
1065		1538
1066	if (expect_true (!CCTX_EXPIRED (cctx)))	1539	if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1067	return cctx;	1540	return cctx;
1068		1541
1069	cctx_destroy (cctx);	1542	cctx_destroy (cctx);
1070	}	1543	}
1071		1544
1072	return cctx_new ();	1545	return cctx_new_run ();
1073	}	1546	}
1074		1547
1075	static void	1548	static void
1076	cctx_put (coro_cctx *cctx)	1549	cctx_put (coro_cctx *cctx)
1077	{	1550	{
		1551	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
		1552
1078	/* free another cctx if overlimit */	1553	/* free another cctx if overlimit */
1079	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1554	if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1080	{	1555	{
1081	coro_cctx *first = cctx_first;	1556	coro_cctx *first = cctx_first;
1082	cctx_first = first->next;	1557	cctx_first = first->next;
1083	--cctx_idle;	1558	--cctx_idle;
1084		1559
…		…
1093	/** coroutine switching *****************************************************/	1568	/** coroutine switching *****************************************************/
1094		1569
1095	static void	1570	static void
1096	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1571	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1097	{	1572	{
		1573	/* TODO: throwing up here is considered harmful */
		1574
1098	if (expect_true (prev != next))	1575	if (ecb_expect_true (prev != next))
1099	{	1576	{
1100	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1577	if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1101	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1578	croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1102		1579
1103	if (expect_false (next->flags & CF_RUNNING))	1580	if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1104	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1105
1106	if (expect_false (next->flags & CF_DESTROYED))
1107	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1581	croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1108		1582
1109	if (
1110	#if PERL_VERSION_ATLEAST (5,9,0)	1583	#if !PERL_VERSION_ATLEAST (5,10,0)
1111	expect_false (PL_parser)
1112	#else
1113	expect_false (PL_lex_state != LEX_NOTPARSING)	1584	if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
		1585	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1114	#endif	1586	#endif
1115	)
1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
1117	}	1587	}
1118	}	1588	}
1119		1589
1120	/* always use the TRANSFER macro */	1590	/* always use the TRANSFER macro */
1121	static void NOINLINE	1591	static void ecb_noinline /* noinline so we have a fixed stackframe */
1122	transfer (pTHX_ struct coro *prev, struct coro *next)	1592	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1123	{	1593	{
1124	dSTACKLEVEL;	1594	dSTACKLEVEL;
1125	static volatile int has_throw;
1126		1595
1127	/* sometimes transfer is only called to set idle_sp */	1596	/* sometimes transfer is only called to set idle_sp */
1128	if (expect_false (!next))	1597	if (ecb_expect_false (!prev))
1129	{	1598	{
1130	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1599	cctx_current->idle_sp = STACKLEVEL;
1131	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1600	assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1132	}	1601	}
1133	else if (expect_true (prev != next))	1602	else if (ecb_expect_true (prev != next))
1134	{	1603	{
1135	coro_cctx *prev__cctx;	1604	coro_cctx *cctx_prev;
1136		1605
1137	if (expect_false (prev->flags & CF_NEW))	1606	if (ecb_expect_false (prev->flags & CF_NEW))
1138	{	1607	{
1139	/* create a new empty context */	1608	/* create a new empty/source context */
1140	Newz (0, prev->cctx, 1, coro_cctx);
1141	prev->flags &= ~CF_NEW;	1609	prev->flags &= ~CF_NEW;
1142	prev->flags |= CF_RUNNING;	1610	prev->flags |= CF_RUNNING;
1143	}	1611	}
1144		1612
1145	prev->flags &= ~CF_RUNNING;	1613	prev->flags &= ~CF_RUNNING;
1146	next->flags |= CF_RUNNING;	1614	next->flags |= CF_RUNNING;
1147		1615
1148	LOCK;
1149
1150	/* first get rid of the old state */	1616	/* first get rid of the old state */
1151	save_perl (aTHX_ prev);	1617	save_perl (aTHX_ prev);
1152		1618
1153	if (expect_false (next->flags & CF_NEW))	1619	if (ecb_expect_false (next->flags & CF_NEW))
1154	{	1620	{
1155	/* need to start coroutine */	1621	/* need to start coroutine */
1156	next->flags &= ~CF_NEW;	1622	next->flags &= ~CF_NEW;
1157	/* setup coroutine call */	1623	/* setup coroutine call */
1158	coro_setup (aTHX_ next);	1624	init_perl (aTHX_ next);
1159	}	1625	}
1160	else	1626	else
1161	load_perl (aTHX_ next);	1627	load_perl (aTHX_ next);
1162		1628
1163	prev__cctx = prev->cctx;
1164
1165	/* possibly "free" the cctx */	1629	/* possibly untie and reuse the cctx */
1166	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))	1630	if (ecb_expect_true (
		1631	cctx_current->idle_sp == STACKLEVEL
		1632	&& !(cctx_current->flags & CC_TRACE)
		1633	&& !force_cctx
		1634	))
1167	{	1635	{
1168	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1636	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1169	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1637	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1170		1638
1171	prev->cctx = 0;
1172
1173	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1639	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1174	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1640	/* without this the next cctx_get might destroy the running cctx while still in use */
1175	if (expect_false (CCTX_EXPIRED (prev__cctx)))	1641	if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1176	if (!next->cctx)	1642	if (ecb_expect_true (!next->cctx))
1177	next->cctx = cctx_get (aTHX);	1643	next->cctx = cctx_get (aTHX);
1178		1644
1179	cctx_put (prev__cctx);	1645	cctx_put (cctx_current);
1180	}	1646	}
		1647	else
		1648	prev->cctx = cctx_current;
1181		1649
1182	++next->usecount;	1650	++next->usecount;
1183		1651
1184	if (expect_true (!next->cctx))	1652	cctx_prev = cctx_current;
1185	next->cctx = cctx_get (aTHX);	1653	cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1186		1654
1187	has_throw = !!next->throw;	1655	next->cctx = 0;
1188		1656
1189	if (expect_false (prev__cctx != next->cctx))	1657	if (ecb_expect_false (cctx_prev != cctx_current))
1190	{	1658	{
1191	prev__cctx->top_env = PL_top_env;	1659	cctx_prev->top_env = PL_top_env;
1192	PL_top_env = next->cctx->top_env;	1660	PL_top_env = cctx_current->top_env;
1193	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1661	coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1194	}	1662	}
1195		1663
1196	free_coro_mortal (aTHX);	1664	transfer_tail (aTHX);
1197	UNLOCK;
1198
1199	if (expect_false (has_throw))
1200	{
1201	struct coro *coro = SvSTATE (coro_current);
1202
1203	if (coro->throw)
1204	{
1205	SV *exception = coro->throw;
1206	coro->throw = 0;
1207	sv_setsv (ERRSV, exception);
1208	croak (0);
1209	}
1210	}
1211	}	1665	}
1212	}	1666	}
1213		1667
1214	struct transfer_args
1215	{
1216	struct coro *prev, *next;
1217	};
1218
1219	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1668	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1220	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1669	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1221		1670
1222	/** high level stuff ********************************************************/	1671	/** high level stuff ********************************************************/
1223		1672
		1673	/* this function is actually Coro, not Coro::State, but we call it from here */
		1674	/* because it is convenient - but it hasn't been declared yet for that reason */
1224	static int	1675	static void
		1676	coro_call_on_destroy (pTHX_ struct coro *coro);
		1677
		1678	static void
1225	coro_state_destroy (pTHX_ struct coro *coro)	1679	coro_state_destroy (pTHX_ struct coro *coro)
1226	{	1680	{
1227	if (coro->flags & CF_DESTROYED)	1681	if (coro->flags & CF_ZOMBIE)
1228	return 0;	1682	return;
1229		1683
		1684	slf_destroy (aTHX_ coro);
		1685
1230	coro->flags |= CF_DESTROYED;	1686	coro->flags |= CF_ZOMBIE;
1231		1687
1232	if (coro->flags & CF_READY)	1688	if (coro->flags & CF_READY)
1233	{	1689	{
1234	/* reduce nready, as destroying a ready coro effectively unreadies it */	1690	/* reduce nready, as destroying a ready coro effectively unreadies it */
1235	/* alternative: look through all ready queues and remove the coro */	1691	/* alternative: look through all ready queues and remove the coro */
1236	LOCK;
1237	--coro_nready;	1692	--coro_nready;
1238	UNLOCK;
1239	}	1693	}
1240	else	1694	else
1241	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1695	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1242
1243	if (coro->mainstack && coro->mainstack != main_mainstack)
1244	{
1245	struct coro temp;
1246
1247	if (coro->flags & CF_RUNNING)
1248	croak ("FATAL: tried to destroy currently running coroutine");
1249
1250	save_perl (aTHX_ &temp);
1251	load_perl (aTHX_ coro);
1252
1253	coro_destroy (aTHX_ coro);
1254
1255	load_perl (aTHX_ &temp);
1256
1257	coro->slot = 0;
1258	}
1259
1260	cctx_destroy (coro->cctx);
1261	SvREFCNT_dec (coro->args);
1262		1696
1263	if (coro->next) coro->next->prev = coro->prev;	1697	if (coro->next) coro->next->prev = coro->prev;
1264	if (coro->prev) coro->prev->next = coro->next;	1698	if (coro->prev) coro->prev->next = coro->next;
1265	if (coro == coro_first) coro_first = coro->next;	1699	if (coro == coro_first) coro_first = coro->next;
1266		1700
1267	return 1;	1701	if (coro->mainstack
		1702	&& coro->mainstack != main_mainstack
		1703	&& coro->slot
		1704	&& !PL_dirty)
		1705	destroy_perl (aTHX_ coro);
		1706
		1707	cctx_destroy (coro->cctx);
		1708	SvREFCNT_dec (coro->startcv);
		1709	SvREFCNT_dec (coro->args);
		1710	SvREFCNT_dec (coro->swap_sv);
		1711	SvREFCNT_dec (CORO_THROW);
		1712
		1713	coro_call_on_destroy (aTHX_ coro);
		1714
		1715	/* more destruction mayhem in coro_state_free */
1268	}	1716	}
1269		1717
1270	static int	1718	static int
1271	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1719	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1272	{	1720	{
1273	struct coro *coro = (struct coro *)mg->mg_ptr;	1721	struct coro *coro = (struct coro *)mg->mg_ptr;
1274	mg->mg_ptr = 0;	1722	mg->mg_ptr = 0;
1275		1723
1276	coro->hv = 0;
1277
1278	if (--coro->refcnt < 0)
1279	{
1280	coro_state_destroy (aTHX_ coro);	1724	coro_state_destroy (aTHX_ coro);
		1725	SvREFCNT_dec (coro->on_destroy);
		1726	SvREFCNT_dec (coro->status);
		1727
1281	Safefree (coro);	1728	Safefree (coro);
1282	}
1283		1729
1284	return 0;	1730	return 0;
1285	}	1731	}
1286		1732
1287	static int	1733	static int ecb_cold
1288	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)	1734	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1289	{	1735	{
1290	struct coro *coro = (struct coro *)mg->mg_ptr;	1736	/* called when perl clones the current process the slow way (windows process emulation) */
1291		1737	/* WE SIMply nuke the pointers in the copy, causing perl to croak */
1292	++coro->refcnt;	1738	mg->mg_ptr = 0;
		1739	mg->mg_virtual = 0;
1293		1740
1294	return 0;	1741	return 0;
1295	}	1742	}
1296		1743
1297	static MGVTBL coro_state_vtbl = {	1744	static MGVTBL coro_state_vtbl = {
…		…
1304	# define MGf_DUP 0	1751	# define MGf_DUP 0
1305	#endif	1752	#endif
1306	};	1753	};
1307		1754
1308	static void	1755	static void
1309	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1756	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1310	{	1757	{
1311	ta->prev = SvSTATE (prev_sv);	1758	ta->prev = SvSTATE (prev_sv);
1312	ta->next = SvSTATE (next_sv);	1759	ta->next = SvSTATE (next_sv);
1313	TRANSFER_CHECK (*ta);	1760	TRANSFER_CHECK (*ta);
1314	}	1761	}
1315		1762
1316	static void	1763	static void
1317	api_transfer (SV *prev_sv, SV *next_sv)	1764	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
		1765	{
		1766	struct coro_transfer_args ta;
		1767
		1768	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1769	TRANSFER (ta, 1);
		1770	}
		1771
		1772	/** Coro ********************************************************************/
		1773
		1774	ecb_inline void
		1775	coro_enq (pTHX_ struct coro *coro)
		1776	{
		1777	struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
		1778
		1779	SvREFCNT_inc_NN (coro->hv);
		1780
		1781	coro->next_ready = 0;
		1782	*(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
		1783	ready [1] = coro;
		1784	}
		1785
		1786	ecb_inline struct coro *
		1787	coro_deq (pTHX)
		1788	{
		1789	int prio;
		1790
		1791	for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
		1792	{
		1793	struct coro **ready = coro_ready [prio];
		1794
		1795	if (ready [0])
		1796	{
		1797	struct coro *coro = ready [0];
		1798	ready [0] = coro->next_ready;
		1799	return coro;
		1800	}
		1801	}
		1802
		1803	return 0;
		1804	}
		1805
		1806	static void
		1807	invoke_sv_ready_hook_helper (void)
1318	{	1808	{
1319	dTHX;	1809	dTHX;
1320	struct transfer_args ta;	1810	dSP;
1321		1811
1322	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1812	ENTER;
1323	TRANSFER (ta);	1813	SAVETMPS;
1324	}
1325		1814
1326	/** Coro ********************************************************************/	1815	PUSHMARK (SP);
		1816	PUTBACK;
		1817	call_sv (coro_readyhook, G_VOID | G_DISCARD);
1327		1818
1328	static void	1819	FREETMPS;
1329	coro_enq (pTHX_ SV *coro_sv)	1820	LEAVE;
1330	{
1331	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1332	}
1333
1334	static SV *
1335	coro_deq (pTHX_ int min_prio)
1336	{
1337	int prio = PRIO_MAX - PRIO_MIN;
1338
1339	min_prio -= PRIO_MIN;
1340	if (min_prio < 0)
1341	min_prio = 0;
1342
1343	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1344	if (AvFILLp (coro_ready [prio]) >= 0)
1345	return av_shift (coro_ready [prio]);
1346
1347	return 0;
1348	}	1821	}
1349		1822
1350	static int	1823	static int
1351	api_ready (SV *coro_sv)	1824	api_ready (pTHX_ SV *coro_sv)
1352	{	1825	{
1353	dTHX;
1354	struct coro *coro;
1355
1356	if (SvROK (coro_sv))
1357	coro_sv = SvRV (coro_sv);
1358
1359	coro = SvSTATE (coro_sv);	1826	struct coro *coro = SvSTATE (coro_sv);
1360		1827
1361	if (coro->flags & CF_READY)	1828	if (coro->flags & CF_READY)
1362	return 0;	1829	return 0;
1363		1830
1364	coro->flags |= CF_READY;	1831	coro->flags |= CF_READY;
1365		1832
1366	LOCK;	1833	coro_enq (aTHX_ coro);
1367	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1834
1368	++coro_nready;	1835	if (!coro_nready++)
1369	UNLOCK;	1836	if (coroapi.readyhook)
		1837	coroapi.readyhook ();
1370		1838
1371	return 1;	1839	return 1;
1372	}	1840	}
1373		1841
1374	static int	1842	static int
1375	api_is_ready (SV *coro_sv)	1843	api_is_ready (pTHX_ SV *coro_sv)
1376	{	1844	{
1377	dTHX;
1378	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1845	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1379	}	1846	}
1380		1847
1381	static void	1848	/* expects to own a reference to next->hv */
		1849	ecb_inline void
1382	prepare_schedule (pTHX_ struct transfer_args *ta)	1850	prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1383	{	1851	{
1384	SV *prev_sv, *next_sv;
1385
1386	for (;;)
1387	{
1388	LOCK;
1389	next_sv = coro_deq (aTHX_ PRIO_MIN);
1390
1391	/* nothing to schedule: call the idle handler */
1392	if (expect_false (!next_sv))
1393	{
1394	dSP;
1395	UNLOCK;
1396
1397	ENTER;
1398	SAVETMPS;
1399
1400	PUSHMARK (SP);
1401	PUTBACK;
1402	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1403
1404	FREETMPS;
1405	LEAVE;
1406	continue;
1407	}
1408
1409	ta->next = SvSTATE (next_sv);
1410
1411	/* cannot transfer to destroyed coros, skip and look for next */
1412	if (expect_false (ta->next->flags & CF_DESTROYED))
1413	{
1414	UNLOCK;
1415	SvREFCNT_dec (next_sv);
1416	/* coro_nready is already taken care of by destroy */
1417	continue;
1418	}
1419
1420	--coro_nready;
1421	UNLOCK;
1422	break;
1423	}
1424
1425	/* free this only after the transfer */
1426	prev_sv = SvRV (coro_current);	1852	SV *prev_sv = SvRV (coro_current);
		1853
1427	ta->prev = SvSTATE (prev_sv);	1854	ta->prev = SvSTATE_hv (prev_sv);
		1855	ta->next = next;
		1856
1428	TRANSFER_CHECK (*ta);	1857	TRANSFER_CHECK (*ta);
1429	assert (ta->next->flags & CF_READY);	1858
1430	ta->next->flags &= ~CF_READY;
1431	SvRV_set (coro_current, next_sv);	1859	SvRV_set (coro_current, (SV *)next->hv);
1432		1860
1433	LOCK;
1434	free_coro_mortal (aTHX);	1861	free_coro_mortal (aTHX);
1435	coro_mortal = prev_sv;	1862	coro_mortal = prev_sv;
1436	UNLOCK;
1437	}	1863	}
1438		1864
1439	static void	1865	static void
		1866	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
		1867	{
		1868	for (;;)
		1869	{
		1870	struct coro *next = coro_deq (aTHX);
		1871
		1872	if (ecb_expect_true (next))
		1873	{
		1874	/* cannot transfer to destroyed coros, skip and look for next */
		1875	if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
		1876	SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
		1877	else
		1878	{
		1879	next->flags &= ~CF_READY;
		1880	--coro_nready;
		1881
		1882	prepare_schedule_to (aTHX_ ta, next);
		1883	break;
		1884	}
		1885	}
		1886	else
		1887	{
		1888	/* nothing to schedule: call the idle handler */
		1889	if (SvROK (sv_idle)
		1890	&& SvOBJECT (SvRV (sv_idle)))
		1891	{
		1892	if (SvRV (sv_idle) == SvRV (coro_current))
		1893	croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
		1894
		1895	++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
		1896	api_ready (aTHX_ SvRV (sv_idle));
		1897	--coro_nready;
		1898	}
		1899	else
		1900	{
		1901	/* TODO: deprecated, remove, cannot work reliably *//*D*/
		1902	dSP;
		1903
		1904	ENTER;
		1905	SAVETMPS;
		1906
		1907	PUSHMARK (SP);
		1908	PUTBACK;
		1909	call_sv (sv_idle, G_VOID | G_DISCARD);
		1910
		1911	FREETMPS;
		1912	LEAVE;
		1913	}
		1914	}
		1915	}
		1916	}
		1917
		1918	ecb_inline void
1440	prepare_cede (pTHX_ struct transfer_args *ta)	1919	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1441	{	1920	{
1442	api_ready (coro_current);	1921	api_ready (aTHX_ coro_current);
1443	prepare_schedule (aTHX_ ta);	1922	prepare_schedule (aTHX_ ta);
1444	}	1923	}
1445		1924
		1925	ecb_inline void
		1926	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1927	{
		1928	SV *prev = SvRV (coro_current);
		1929
		1930	if (coro_nready)
		1931	{
		1932	prepare_schedule (aTHX_ ta);
		1933	api_ready (aTHX_ prev);
		1934	}
		1935	else
		1936	prepare_nop (aTHX_ ta);
		1937	}
		1938
		1939	static void
		1940	api_schedule (pTHX)
		1941	{
		1942	struct coro_transfer_args ta;
		1943
		1944	prepare_schedule (aTHX_ &ta);
		1945	TRANSFER (ta, 1);
		1946	}
		1947
		1948	static void
		1949	api_schedule_to (pTHX_ SV *coro_sv)
		1950	{
		1951	struct coro_transfer_args ta;
		1952	struct coro *next = SvSTATE (coro_sv);
		1953
		1954	SvREFCNT_inc_NN (coro_sv);
		1955	prepare_schedule_to (aTHX_ &ta, next);
		1956	}
		1957
1446	static int	1958	static int
1447	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1959	api_cede (pTHX)
1448	{	1960	{
1449	if (coro_nready)	1961	struct coro_transfer_args ta;
1450	{	1962
1451	SV *prev = SvRV (coro_current);
1452	prepare_schedule (aTHX_ ta);	1963	prepare_cede (aTHX_ &ta);
1453	api_ready (prev);	1964
		1965	if (ecb_expect_true (ta.prev != ta.next))
		1966	{
		1967	TRANSFER (ta, 1);
1454	return 1;	1968	return 1;
1455	}	1969	}
1456	else	1970	else
1457	return 0;	1971	return 0;
1458	}	1972	}
1459		1973
1460	static void
1461	api_schedule (void)
1462	{
1463	dTHX;
1464	struct transfer_args ta;
1465
1466	prepare_schedule (aTHX_ &ta);
1467	TRANSFER (ta);
1468	}
1469
1470	static int	1974	static int
1471	api_cede (void)	1975	api_cede_notself (pTHX)
1472	{	1976	{
1473	dTHX;	1977	if (coro_nready)
		1978	{
1474	struct transfer_args ta;	1979	struct coro_transfer_args ta;
1475		1980
1476	prepare_cede (aTHX_ &ta);	1981	prepare_cede_notself (aTHX_ &ta);
1477
1478	if (expect_true (ta.prev != ta.next))
1479	{
1480	TRANSFER (ta);	1982	TRANSFER (ta, 1);
1481	return 1;	1983	return 1;
1482	}	1984	}
1483	else	1985	else
1484	return 0;	1986	return 0;
1485	}	1987	}
1486		1988
1487	static int	1989	static void
1488	api_cede_notself (void)
1489	{
1490	dTHX;
1491	struct transfer_args ta;
1492
1493	if (prepare_cede_notself (aTHX_ &ta))
1494	{
1495	TRANSFER (ta);
1496	return 1;
1497	}
1498	else
1499	return 0;
1500	}
1501
1502	static void
1503	api_trace (SV *coro_sv, int flags)	1990	api_trace (pTHX_ SV *coro_sv, int flags)
1504	{	1991	{
1505	dTHX;
1506	struct coro *coro = SvSTATE (coro_sv);	1992	struct coro *coro = SvSTATE (coro_sv);
1507		1993
		1994	if (coro->flags & CF_RUNNING)
		1995	croak ("cannot enable tracing on a running coroutine, caught");
		1996
1508	if (flags & CC_TRACE)	1997	if (flags & CC_TRACE)
1509	{	1998	{
1510	if (!coro->cctx)	1999	if (!coro->cctx)
1511	coro->cctx = cctx_new ();	2000	coro->cctx = cctx_new_run ();
1512	else if (!(coro->cctx->flags & CC_TRACE))	2001	else if (!(coro->cctx->flags & CC_TRACE))
1513	croak ("cannot enable tracing on coroutine with custom stack");	2002	croak ("cannot enable tracing on coroutine with custom stack, caught");
1514		2003
1515	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	2004	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1516	}	2005	}
1517	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	2006	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1518	{	2007	{
…		…
1523	else	2012	else
1524	coro->slot->runops = RUNOPS_DEFAULT;	2013	coro->slot->runops = RUNOPS_DEFAULT;
1525	}	2014	}
1526	}	2015	}
1527		2016
		2017	static void
		2018	coro_push_av (pTHX_ AV *av, I32 gimme_v)
		2019	{
		2020	if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
		2021	{
		2022	dSP;
		2023
		2024	if (gimme_v == G_SCALAR)
		2025	XPUSHs (AvARRAY (av)[AvFILLp (av)]);
		2026	else
		2027	{
		2028	int i;
		2029	EXTEND (SP, AvFILLp (av) + 1);
		2030
		2031	for (i = 0; i <= AvFILLp (av); ++i)
		2032	PUSHs (AvARRAY (av)[i]);
		2033	}
		2034
		2035	PUTBACK;
		2036	}
		2037	}
		2038
		2039	static void
		2040	coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
		2041	{
		2042	if (!coro->on_destroy)
		2043	coro->on_destroy = newAV ();
		2044
		2045	av_push (coro->on_destroy, cb);
		2046	}
		2047
		2048	static void
		2049	slf_destroy_join (pTHX_ struct CoroSLF *frame)
		2050	{
		2051	SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
		2052	}
		2053
		2054	static int
		2055	slf_check_join (pTHX_ struct CoroSLF *frame)
		2056	{
		2057	struct coro *coro = (struct coro *)frame->data;
		2058
		2059	if (!coro->status)
		2060	return 1;
		2061
		2062	frame->destroy = 0;
		2063
		2064	coro_push_av (aTHX_ coro->status, GIMME_V);
		2065
		2066	SvREFCNT_dec ((SV *)coro->hv);
		2067
		2068	return 0;
		2069	}
		2070
		2071	static void
		2072	slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2073	{
		2074	struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
		2075
		2076	if (items > 1)
		2077	croak ("join called with too many arguments");
		2078
		2079	if (coro->status)
		2080	frame->prepare = prepare_nop;
		2081	else
		2082	{
		2083	coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
		2084	frame->prepare = prepare_schedule;
		2085	}
		2086
		2087	frame->check = slf_check_join;
		2088	frame->destroy = slf_destroy_join;
		2089	frame->data = (void *)coro;
		2090	SvREFCNT_inc (coro->hv);
		2091	}
		2092
		2093	static void
		2094	coro_call_on_destroy (pTHX_ struct coro *coro)
		2095	{
		2096	AV *od = coro->on_destroy;
		2097
		2098	if (!od)
		2099	return;
		2100
		2101	while (AvFILLp (od) >= 0)
		2102	{
		2103	SV *cb = sv_2mortal (av_pop (od));
		2104
		2105	/* coro hv's (and only hv's at the moment) are supported as well */
		2106	if (SvSTATEhv_p (aTHX_ cb))
		2107	api_ready (aTHX_ cb);
		2108	else
		2109	{
		2110	dSP; /* don't disturb outer sp */
		2111	PUSHMARK (SP);
		2112
		2113	if (coro->status)
		2114	{
		2115	PUTBACK;
		2116	coro_push_av (aTHX_ coro->status, G_ARRAY);
		2117	SPAGAIN;
		2118	}
		2119
		2120	PUTBACK;
		2121	call_sv (cb, G_VOID | G_DISCARD);
		2122	}
		2123	}
		2124	}
		2125
		2126	static void
		2127	coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
		2128	{
		2129	AV *av;
		2130
		2131	if (coro->status)
		2132	{
		2133	av = coro->status;
		2134	av_clear (av);
		2135	}
		2136	else
		2137	av = coro->status = newAV ();
		2138
		2139	/* items are actually not so common, so optimise for this case */
		2140	if (items)
		2141	{
		2142	int i;
		2143
		2144	av_extend (av, items - 1);
		2145
		2146	for (i = 0; i < items; ++i)
		2147	av_push (av, SvREFCNT_inc_NN (arg [i]));
		2148	}
		2149	}
		2150
		2151	static void
		2152	slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
		2153	{
		2154	av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
		2155	api_ready (aTHX_ sv_manager);
		2156
		2157	frame->prepare = prepare_schedule;
		2158	frame->check = slf_check_repeat;
		2159
		2160	/* as a minor optimisation, we could unwind all stacks here */
		2161	/* but that puts extra pressure on pp_slf, and is not worth much */
		2162	/*coro_unwind_stacks (aTHX);*/
		2163	}
		2164
		2165	static void
		2166	slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2167	{
		2168	HV *coro_hv = (HV *)SvRV (coro_current);
		2169
		2170	coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
		2171	slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
		2172	}
		2173
		2174	static void
		2175	slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2176	{
		2177	HV *coro_hv;
		2178	struct coro *coro;
		2179
		2180	if (items <= 0)
		2181	croak ("Coro::cancel called without coro object,");
		2182
		2183	coro = SvSTATE (arg [0]);
		2184	coro_hv = coro->hv;
		2185
		2186	coro_set_status (aTHX_ coro, arg + 1, items - 1);
		2187
		2188	if (ecb_expect_false (coro->flags & CF_NOCANCEL))
		2189	{
		2190	/* coro currently busy cancelling something, so just notify it */
		2191	coro->slf_frame.data = (void *)coro;
		2192
		2193	frame->prepare = prepare_nop;
		2194	frame->check = slf_check_nop;
		2195	}
		2196	else if (coro_hv == (HV *)SvRV (coro_current))
		2197	{
		2198	/* cancelling the current coro is allowed, and equals terminate */
		2199	slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
		2200	}
		2201	else
		2202	{
		2203	struct coro *self = SvSTATE_current;
		2204
		2205	/* otherwise we cancel directly, purely for speed reasons
		2206	* unfortunately, this requires some magic trickery, as
		2207	* somebody else could cancel us, so we have to fight the cancellation.
		2208	* this is ugly, and hopefully fully worth the extra speed.
		2209	* besides, I can't get the slow-but-safe version working...
		2210	*/
		2211	slf_frame.data = 0;
		2212	self->flags |= CF_NOCANCEL;
		2213	coro_state_destroy (aTHX_ coro);
		2214	self->flags &= ~CF_NOCANCEL;
		2215
		2216	if (slf_frame.data)
		2217	{
		2218	/* while we were busy we have been cancelled, so terminate */
		2219	slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
		2220	}
		2221	else
		2222	{
		2223	frame->prepare = prepare_nop;
		2224	frame->check = slf_check_nop;
		2225	}
		2226	}
		2227	}
		2228
		2229	static int
		2230	slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
		2231	{
		2232	frame->prepare = 0;
		2233	coro_unwind_stacks (aTHX);
		2234
		2235	slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
		2236
		2237	return 1;
		2238	}
		2239
		2240	static int
		2241	safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
		2242	{
		2243	if (coro->cctx)
		2244	croak ("coro inside C callback, unable to cancel at this time, caught");
		2245
		2246	if (coro->flags & CF_NEW)
		2247	{
		2248	coro_set_status (aTHX_ coro, arg, items);
		2249	coro_state_destroy (aTHX_ coro);
		2250	}
		2251	else
		2252	{
		2253	if (!coro->slf_frame.prepare)
		2254	croak ("coro outside an SLF function, unable to cancel at this time, caught");
		2255
		2256	slf_destroy (aTHX_ coro);
		2257
		2258	coro_set_status (aTHX_ coro, arg, items);
		2259	coro->slf_frame.prepare = prepare_nop;
		2260	coro->slf_frame.check = slf_check_safe_cancel;
		2261
		2262	api_ready (aTHX_ (SV *)coro->hv);
		2263	}
		2264
		2265	return 1;
		2266	}
		2267
		2268	/*****************************************************************************/
		2269	/* async pool handler */
		2270
		2271	static int
		2272	slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
		2273	{
		2274	HV *hv = (HV *)SvRV (coro_current);
		2275	struct coro *coro = (struct coro *)frame->data;
		2276
		2277	if (!coro->invoke_cb)
		2278	return 1; /* loop till we have invoke */
		2279	else
		2280	{
		2281	hv_store (hv, "desc", sizeof ("desc") - 1,
		2282	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2283
		2284	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
		2285
		2286	{
		2287	dSP;
		2288	XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
		2289	PUTBACK;
		2290	}
		2291
		2292	SvREFCNT_dec (GvAV (PL_defgv));
		2293	GvAV (PL_defgv) = coro->invoke_av;
		2294	coro->invoke_av = 0;
		2295
		2296	return 0;
		2297	}
		2298	}
		2299
		2300	static void
		2301	slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2302	{
		2303	HV *hv = (HV *)SvRV (coro_current);
		2304	struct coro *coro = SvSTATE_hv ((SV *)hv);
		2305
		2306	if (ecb_expect_true (coro->saved_deffh))
		2307	{
		2308	/* subsequent iteration */
		2309	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2310	coro->saved_deffh = 0;
		2311
		2312	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
		2313	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2314	{
		2315	slf_init_terminate_cancel_common (aTHX_ frame, hv);
		2316	return;
		2317	}
		2318	else
		2319	{
		2320	av_clear (GvAV (PL_defgv));
		2321	hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
		2322
		2323	coro->prio = 0;
		2324
		2325	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2326	api_trace (aTHX_ coro_current, 0);
		2327
		2328	frame->prepare = prepare_schedule;
		2329	av_push (av_async_pool, SvREFCNT_inc (hv));
		2330	}
		2331	}
		2332	else
		2333	{
		2334	/* first iteration, simply fall through */
		2335	frame->prepare = prepare_nop;
		2336	}
		2337
		2338	frame->check = slf_check_pool_handler;
		2339	frame->data = (void *)coro;
		2340	}
		2341
		2342	/*****************************************************************************/
		2343	/* rouse callback */
		2344
		2345	#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
		2346
		2347	static void
		2348	coro_rouse_callback (pTHX_ CV *cv)
		2349	{
		2350	dXSARGS;
		2351	SV *data = (SV *)S_GENSUB_ARG;
		2352
		2353	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		2354	{
		2355	/* first call, set args */
		2356	SV *coro = SvRV (data);
		2357	AV *av = newAV ();
		2358
		2359	SvRV_set (data, (SV *)av);
		2360
		2361	/* better take a full copy of the arguments */
		2362	while (items--)
		2363	av_store (av, items, newSVsv (ST (items)));
		2364
		2365	api_ready (aTHX_ coro);
		2366	SvREFCNT_dec (coro);
		2367	}
		2368
		2369	XSRETURN_EMPTY;
		2370	}
		2371
		2372	static int
		2373	slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
		2374	{
		2375	SV *data = (SV *)frame->data;
		2376
		2377	if (CORO_THROW)
		2378	return 0;
		2379
		2380	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		2381	return 1;
		2382
		2383	/* now push all results on the stack */
		2384	{
		2385	dSP;
		2386	AV *av = (AV *)SvRV (data);
		2387	int i;
		2388
		2389	EXTEND (SP, AvFILLp (av) + 1);
		2390	for (i = 0; i <= AvFILLp (av); ++i)
		2391	PUSHs (sv_2mortal (AvARRAY (av)[i]));
		2392
		2393	/* we have stolen the elements, so set length to zero and free */
		2394	AvFILLp (av) = -1;
		2395	av_undef (av);
		2396
		2397	PUTBACK;
		2398	}
		2399
		2400	return 0;
		2401	}
		2402
		2403	static void
		2404	slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2405	{
		2406	SV *cb;
		2407
		2408	if (items)
		2409	cb = arg [0];
		2410	else
		2411	{
		2412	struct coro *coro = SvSTATE_current;
		2413
		2414	if (!coro->rouse_cb)
		2415	croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
		2416
		2417	cb = sv_2mortal (coro->rouse_cb);
		2418	coro->rouse_cb = 0;
		2419	}
		2420
		2421	if (!SvROK (cb)
		2422	|| SvTYPE (SvRV (cb)) != SVt_PVCV
		2423	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
		2424	croak ("Coro::rouse_wait called with illegal callback argument,");
		2425
		2426	{
		2427	CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
		2428	SV *data = (SV *)S_GENSUB_ARG;
		2429
		2430	frame->data = (void *)data;
		2431	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
		2432	frame->check = slf_check_rouse_wait;
		2433	}
		2434	}
		2435
		2436	static SV *
		2437	coro_new_rouse_cb (pTHX)
		2438	{
		2439	HV *hv = (HV *)SvRV (coro_current);
		2440	struct coro *coro = SvSTATE_hv (hv);
		2441	SV *data = newRV_inc ((SV *)hv);
		2442	SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
		2443
		2444	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
		2445	SvREFCNT_dec (data); /* magicext increases the refcount */
		2446
		2447	SvREFCNT_dec (coro->rouse_cb);
		2448	coro->rouse_cb = SvREFCNT_inc_NN (cb);
		2449
		2450	return cb;
		2451	}
		2452
		2453	/*****************************************************************************/
		2454	/* schedule-like-function opcode (SLF) */
		2455
		2456	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		2457	static const CV *slf_cv;
		2458	static SV **slf_argv;
		2459	static int slf_argc, slf_arga; /* count, allocated */
		2460	static I32 slf_ax; /* top of stack, for restore */
		2461
		2462	/* this restores the stack in the case we patched the entersub, to */
		2463	/* recreate the stack frame as perl will on following calls */
		2464	/* since entersub cleared the stack */
		2465	static OP *
		2466	pp_restore (pTHX)
		2467	{
		2468	int i;
		2469	SV **SP = PL_stack_base + slf_ax;
		2470
		2471	PUSHMARK (SP);
		2472
		2473	EXTEND (SP, slf_argc + 1);
		2474
		2475	for (i = 0; i < slf_argc; ++i)
		2476	PUSHs (sv_2mortal (slf_argv [i]));
		2477
		2478	PUSHs ((SV *)CvGV (slf_cv));
		2479
		2480	RETURNOP (slf_restore.op_first);
		2481	}
		2482
		2483	static void
		2484	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		2485	{
		2486	SV **arg = (SV **)slf_frame.data;
		2487
		2488	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		2489	}
		2490
		2491	static void
		2492	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2493	{
		2494	if (items != 2)
		2495	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		2496
		2497	frame->prepare = slf_prepare_transfer;
		2498	frame->check = slf_check_nop;
		2499	frame->data = (void *)arg; /* let's hope it will stay valid */
		2500	}
		2501
		2502	static void
		2503	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2504	{
		2505	frame->prepare = prepare_schedule;
		2506	frame->check = slf_check_nop;
		2507	}
		2508
		2509	static void
		2510	slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
		2511	{
		2512	struct coro *next = (struct coro *)slf_frame.data;
		2513
		2514	SvREFCNT_inc_NN (next->hv);
		2515	prepare_schedule_to (aTHX_ ta, next);
		2516	}
		2517
		2518	static void
		2519	slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2520	{
		2521	if (!items)
		2522	croak ("Coro::schedule_to expects a coroutine argument, caught");
		2523
		2524	frame->data = (void *)SvSTATE (arg [0]);
		2525	frame->prepare = slf_prepare_schedule_to;
		2526	frame->check = slf_check_nop;
		2527	}
		2528
		2529	static void
		2530	slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2531	{
		2532	api_ready (aTHX_ SvRV (coro_current));
		2533
		2534	slf_init_schedule_to (aTHX_ frame, cv, arg, items);
		2535	}
		2536
		2537	static void
		2538	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2539	{
		2540	frame->prepare = prepare_cede;
		2541	frame->check = slf_check_nop;
		2542	}
		2543
		2544	static void
		2545	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2546	{
		2547	frame->prepare = prepare_cede_notself;
		2548	frame->check = slf_check_nop;
		2549	}
		2550
		2551	/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
		2552	static void
		2553	slf_destroy (pTHX_ struct coro *coro)
		2554	{
		2555	/* this callback is reserved for slf functions needing to do cleanup */
		2556	if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
		2557	coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
		2558
		2559	/*
		2560	* The on_destroy above most likely is from an SLF call.
		2561	* Since by definition the SLF call will not finish when we destroy
		2562	* the coro, we will have to force-finish it here, otherwise
		2563	* cleanup functions cannot call SLF functions.
		2564	*/
		2565	coro->slf_frame.prepare = 0;
		2566	}
		2567
		2568	/*
		2569	* these not obviously related functions are all rolled into one
		2570	* function to increase chances that they all will call transfer with the same
		2571	* stack offset
		2572	* SLF stands for "schedule-like-function".
		2573	*/
		2574	static OP *
		2575	pp_slf (pTHX)
		2576	{
		2577	I32 checkmark; /* mark SP to see how many elements check has pushed */
		2578
		2579	/* set up the slf frame, unless it has already been set-up */
		2580	/* the latter happens when a new coro has been started */
		2581	/* or when a new cctx was attached to an existing coroutine */
		2582	if (ecb_expect_true (!slf_frame.prepare))
		2583	{
		2584	/* first iteration */
		2585	dSP;
		2586	SV **arg = PL_stack_base + TOPMARK + 1;
		2587	int items = SP - arg; /* args without function object */
		2588	SV *gv = *sp;
		2589
		2590	/* do a quick consistency check on the "function" object, and if it isn't */
		2591	/* for us, divert to the real entersub */
		2592	if (SvTYPE (gv) != SVt_PVGV
		2593	|| !GvCV (gv)
		2594	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		2595	return PL_ppaddr[OP_ENTERSUB](aTHX);
		2596
		2597	if (!(PL_op->op_flags & OPf_STACKED))
		2598	{
		2599	/* ampersand-form of call, use @_ instead of stack */
		2600	AV *av = GvAV (PL_defgv);
		2601	arg = AvARRAY (av);
		2602	items = AvFILLp (av) + 1;
		2603	}
		2604
		2605	/* now call the init function, which needs to set up slf_frame */
		2606	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		2607	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		2608
		2609	/* pop args */
		2610	SP = PL_stack_base + POPMARK;
		2611
		2612	PUTBACK;
		2613	}
		2614
		2615	/* now that we have a slf_frame, interpret it! */
		2616	/* we use a callback system not to make the code needlessly */
		2617	/* complicated, but so we can run multiple perl coros from one cctx */
		2618
		2619	do
		2620	{
		2621	struct coro_transfer_args ta;
		2622
		2623	slf_frame.prepare (aTHX_ &ta);
		2624	TRANSFER (ta, 0);
		2625
		2626	checkmark = PL_stack_sp - PL_stack_base;
		2627	}
		2628	while (slf_frame.check (aTHX_ &slf_frame));
		2629
		2630	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		2631
		2632	/* exception handling */
		2633	if (ecb_expect_false (CORO_THROW))
		2634	{
		2635	SV *exception = sv_2mortal (CORO_THROW);
		2636
		2637	CORO_THROW = 0;
		2638	sv_setsv (ERRSV, exception);
		2639	croak (0);
		2640	}
		2641
		2642	/* return value handling - mostly like entersub */
		2643	/* make sure we put something on the stack in scalar context */
		2644	if (GIMME_V == G_SCALAR
		2645	&& ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
		2646	{
		2647	dSP;
		2648	SV **bot = PL_stack_base + checkmark;
		2649
		2650	if (sp == bot) /* too few, push undef */
		2651	bot [1] = &PL_sv_undef;
		2652	else /* too many, take last one */
		2653	bot [1] = *sp;
		2654
		2655	SP = bot + 1;
		2656
		2657	PUTBACK;
		2658	}
		2659
		2660	return NORMAL;
		2661	}
		2662
		2663	static void
		2664	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		2665	{
		2666	int i;
		2667	SV **arg = PL_stack_base + ax;
		2668	int items = PL_stack_sp - arg + 1;
		2669
		2670	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		2671
		2672	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		2673	&& PL_op->op_ppaddr != pp_slf)
		2674	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		2675
		2676	CvFLAGS (cv) |= CVf_SLF;
		2677	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		2678	slf_cv = cv;
		2679
		2680	/* we patch the op, and then re-run the whole call */
		2681	/* we have to put the same argument on the stack for this to work */
		2682	/* and this will be done by pp_restore */
		2683	slf_restore.op_next = (OP *)&slf_restore;
		2684	slf_restore.op_type = OP_CUSTOM;
		2685	slf_restore.op_ppaddr = pp_restore;
		2686	slf_restore.op_first = PL_op;
		2687
		2688	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		2689
		2690	if (PL_op->op_flags & OPf_STACKED)
		2691	{
		2692	if (items > slf_arga)
		2693	{
		2694	slf_arga = items;
		2695	Safefree (slf_argv);
		2696	New (0, slf_argv, slf_arga, SV *);
		2697	}
		2698
		2699	slf_argc = items;
		2700
		2701	for (i = 0; i < items; ++i)
		2702	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2703	}
		2704	else
		2705	slf_argc = 0;
		2706
		2707	PL_op->op_ppaddr = pp_slf;
		2708	/*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
		2709
		2710	PL_op = (OP *)&slf_restore;
		2711	}
		2712
		2713	/*****************************************************************************/
		2714	/* dynamic wind */
		2715
		2716	static void
		2717	on_enterleave_call (pTHX_ SV *cb)
		2718	{
		2719	dSP;
		2720
		2721	PUSHSTACK;
		2722
		2723	PUSHMARK (SP);
		2724	PUTBACK;
		2725	call_sv (cb, G_VOID | G_DISCARD);
		2726	SPAGAIN;
		2727
		2728	POPSTACK;
		2729	}
		2730
		2731	static SV *
		2732	coro_avp_pop_and_free (pTHX_ AV **avp)
		2733	{
		2734	AV *av = *avp;
		2735	SV *res = av_pop (av);
		2736
		2737	if (AvFILLp (av) < 0)
		2738	{
		2739	*avp = 0;
		2740	SvREFCNT_dec (av);
		2741	}
		2742
		2743	return res;
		2744	}
		2745
		2746	static void
		2747	coro_pop_on_enter (pTHX_ void *coro)
		2748	{
		2749	SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
		2750	SvREFCNT_dec (cb);
		2751	}
		2752
		2753	static void
		2754	coro_pop_on_leave (pTHX_ void *coro)
		2755	{
		2756	SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
		2757	on_enterleave_call (aTHX_ sv_2mortal (cb));
		2758	}
		2759
		2760	/*****************************************************************************/
		2761	/* PerlIO::cede */
		2762
		2763	typedef struct
		2764	{
		2765	PerlIOBuf base;
		2766	NV next, every;
		2767	} PerlIOCede;
		2768
		2769	static IV ecb_cold
		2770	PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
		2771	{
		2772	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		2773
		2774	self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
		2775	self->next = nvtime () + self->every;
		2776
		2777	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		2778	}
		2779
		2780	static SV * ecb_cold
		2781	PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
		2782	{
		2783	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		2784
		2785	return newSVnv (self->every);
		2786	}
		2787
		2788	static IV
		2789	PerlIOCede_flush (pTHX_ PerlIO *f)
		2790	{
		2791	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		2792	double now = nvtime ();
		2793
		2794	if (now >= self->next)
		2795	{
		2796	api_cede (aTHX);
		2797	self->next = now + self->every;
		2798	}
		2799
		2800	return PerlIOBuf_flush (aTHX_ f);
		2801	}
		2802
		2803	static PerlIO_funcs PerlIO_cede =
		2804	{
		2805	sizeof(PerlIO_funcs),
		2806	"cede",
		2807	sizeof(PerlIOCede),
		2808	PERLIO_K_DESTRUCT | PERLIO_K_RAW,
		2809	PerlIOCede_pushed,
		2810	PerlIOBuf_popped,
		2811	PerlIOBuf_open,
		2812	PerlIOBase_binmode,
		2813	PerlIOCede_getarg,
		2814	PerlIOBase_fileno,
		2815	PerlIOBuf_dup,
		2816	PerlIOBuf_read,
		2817	PerlIOBuf_unread,
		2818	PerlIOBuf_write,
		2819	PerlIOBuf_seek,
		2820	PerlIOBuf_tell,
		2821	PerlIOBuf_close,
		2822	PerlIOCede_flush,
		2823	PerlIOBuf_fill,
		2824	PerlIOBase_eof,
		2825	PerlIOBase_error,
		2826	PerlIOBase_clearerr,
		2827	PerlIOBase_setlinebuf,
		2828	PerlIOBuf_get_base,
		2829	PerlIOBuf_bufsiz,
		2830	PerlIOBuf_get_ptr,
		2831	PerlIOBuf_get_cnt,
		2832	PerlIOBuf_set_ptrcnt,
		2833	};
		2834
		2835	/*****************************************************************************/
		2836	/* Coro::Semaphore & Coro::Signal */
		2837
		2838	static SV *
		2839	coro_waitarray_new (pTHX_ int count)
		2840	{
		2841	/* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2842	AV *av = newAV ();
		2843	SV **ary;
		2844
		2845	/* unfortunately, building manually saves memory */
		2846	Newx (ary, 2, SV *);
		2847	AvALLOC (av) = ary;
		2848	#if PERL_VERSION_ATLEAST (5,10,0)
		2849	AvARRAY (av) = ary;
		2850	#else
		2851	/* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
		2852	/* -DDEBUGGING flags this as a bug, despite it perfectly working */
		2853	SvPVX ((SV *)av) = (char *)ary;
		2854	#endif
		2855	AvMAX (av) = 1;
		2856	AvFILLp (av) = 0;
		2857	ary [0] = newSViv (count);
		2858
		2859	return newRV_noinc ((SV *)av);
		2860	}
		2861
		2862	/* semaphore */
		2863
		2864	static void
		2865	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2866	{
		2867	SV *count_sv = AvARRAY (av)[0];
		2868	IV count = SvIVX (count_sv);
		2869
		2870	count += adjust;
		2871	SvIVX (count_sv) = count;
		2872
		2873	/* now wake up as many waiters as are expected to lock */
		2874	while (count > 0 && AvFILLp (av) > 0)
		2875	{
		2876	SV *cb;
		2877
		2878	/* swap first two elements so we can shift a waiter */
		2879	AvARRAY (av)[0] = AvARRAY (av)[1];
		2880	AvARRAY (av)[1] = count_sv;
		2881	cb = av_shift (av);
		2882
		2883	if (SvOBJECT (cb))
		2884	{
		2885	api_ready (aTHX_ cb);
		2886	--count;
		2887	}
		2888	else if (SvTYPE (cb) == SVt_PVCV)
		2889	{
		2890	dSP;
		2891	PUSHMARK (SP);
		2892	XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
		2893	PUTBACK;
		2894	call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
		2895	}
		2896
		2897	SvREFCNT_dec (cb);
		2898	}
		2899	}
		2900
		2901	static void
		2902	coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
		2903	{
		2904	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2905	coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
		2906	}
		2907
		2908	static int
		2909	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
		2910	{
		2911	AV *av = (AV *)frame->data;
		2912	SV *count_sv = AvARRAY (av)[0];
		2913	SV *coro_hv = SvRV (coro_current);
		2914
		2915	/* if we are about to throw, don't actually acquire the lock, just throw */
		2916	if (CORO_THROW)
		2917	return 0;
		2918	else if (SvIVX (count_sv) > 0)
		2919	{
		2920	frame->destroy = 0;
		2921
		2922	if (acquire)
		2923	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2924	else
		2925	coro_semaphore_adjust (aTHX_ av, 0);
		2926
		2927	return 0;
		2928	}
		2929	else
		2930	{
		2931	int i;
		2932	/* if we were woken up but can't down, we look through the whole */
		2933	/* waiters list and only add us if we aren't in there already */
		2934	/* this avoids some degenerate memory usage cases */
		2935	for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
		2936	if (AvARRAY (av)[i] == coro_hv)
		2937	return 1;
		2938
		2939	av_push (av, SvREFCNT_inc (coro_hv));
		2940	return 1;
		2941	}
		2942	}
		2943
		2944	static int
		2945	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2946	{
		2947	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2948	}
		2949
		2950	static int
		2951	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2952	{
		2953	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2954	}
		2955
		2956	static void
		2957	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2958	{
		2959	AV *av = (AV *)SvRV (arg [0]);
		2960
		2961	if (SvIVX (AvARRAY (av)[0]) > 0)
		2962	{
		2963	frame->data = (void *)av;
		2964	frame->prepare = prepare_nop;
		2965	}
		2966	else
		2967	{
		2968	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2969
		2970	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2971	frame->prepare = prepare_schedule;
		2972	/* to avoid race conditions when a woken-up coro gets terminated */
		2973	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2974	frame->destroy = coro_semaphore_destroy;
		2975	}
		2976	}
		2977
		2978	static void
		2979	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2980	{
		2981	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2982	frame->check = slf_check_semaphore_down;
		2983	}
		2984
		2985	static void
		2986	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2987	{
		2988	if (items >= 2)
		2989	{
		2990	/* callback form */
		2991	AV *av = (AV *)SvRV (arg [0]);
		2992	SV *cb_cv = s_get_cv_croak (arg [1]);
		2993
		2994	av_push (av, SvREFCNT_inc_NN (cb_cv));
		2995
		2996	if (SvIVX (AvARRAY (av)[0]) > 0)
		2997	coro_semaphore_adjust (aTHX_ av, 0);
		2998
		2999	frame->prepare = prepare_nop;
		3000	frame->check = slf_check_nop;
		3001	}
		3002	else
		3003	{
		3004	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		3005	frame->check = slf_check_semaphore_wait;
		3006	}
		3007	}
		3008
		3009	/* signal */
		3010
		3011	static void
		3012	coro_signal_wake (pTHX_ AV *av, int count)
		3013	{
		3014	SvIVX (AvARRAY (av)[0]) = 0;
		3015
		3016	/* now signal count waiters */
		3017	while (count > 0 && AvFILLp (av) > 0)
		3018	{
		3019	SV *cb;
		3020
		3021	/* swap first two elements so we can shift a waiter */
		3022	cb = AvARRAY (av)[0];
		3023	AvARRAY (av)[0] = AvARRAY (av)[1];
		3024	AvARRAY (av)[1] = cb;
		3025
		3026	cb = av_shift (av);
		3027
		3028	if (SvTYPE (cb) == SVt_PVCV)
		3029	{
		3030	dSP;
		3031	PUSHMARK (SP);
		3032	XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
		3033	PUTBACK;
		3034	call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
		3035	}
		3036	else
		3037	{
		3038	api_ready (aTHX_ cb);
		3039	sv_setiv (cb, 0); /* signal waiter */
		3040	}
		3041
		3042	SvREFCNT_dec (cb);
		3043
		3044	--count;
		3045	}
		3046	}
		3047
		3048	static int
		3049	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		3050	{
		3051	/* if we are about to throw, also stop waiting */
		3052	return SvROK ((SV *)frame->data) && !CORO_THROW;
		3053	}
		3054
		3055	static void
		3056	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		3057	{
		3058	AV *av = (AV *)SvRV (arg [0]);
		3059
		3060	if (items >= 2)
		3061	{
		3062	SV *cb_cv = s_get_cv_croak (arg [1]);
		3063	av_push (av, SvREFCNT_inc_NN (cb_cv));
		3064
		3065	if (SvIVX (AvARRAY (av)[0]))
		3066	coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
		3067
		3068	frame->prepare = prepare_nop;
		3069	frame->check = slf_check_nop;
		3070	}
		3071	else if (SvIVX (AvARRAY (av)[0]))
		3072	{
		3073	SvIVX (AvARRAY (av)[0]) = 0;
		3074	frame->prepare = prepare_nop;
		3075	frame->check = slf_check_nop;
		3076	}
		3077	else
		3078	{
		3079	SV *waiter = newSVsv (coro_current); /* owned by signal av */
		3080
		3081	av_push (av, waiter);
		3082
		3083	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		3084	frame->prepare = prepare_schedule;
		3085	frame->check = slf_check_signal_wait;
		3086	}
		3087	}
		3088
		3089	/*****************************************************************************/
		3090	/* Coro::AIO */
		3091
		3092	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		3093
		3094	/* helper storage struct */
		3095	struct io_state
		3096	{
		3097	int errorno;
		3098	I32 laststype; /* U16 in 5.10.0 */
		3099	int laststatval;
		3100	Stat_t statcache;
		3101	};
		3102
		3103	static void
		3104	coro_aio_callback (pTHX_ CV *cv)
		3105	{
		3106	dXSARGS;
		3107	AV *state = (AV *)S_GENSUB_ARG;
		3108	SV *coro = av_pop (state);
		3109	SV *data_sv = newSV (sizeof (struct io_state));
		3110
		3111	av_extend (state, items - 1);
		3112
		3113	sv_upgrade (data_sv, SVt_PV);
		3114	SvCUR_set (data_sv, sizeof (struct io_state));
		3115	SvPOK_only (data_sv);
		3116
		3117	{
		3118	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		3119
		3120	data->errorno = errno;
		3121	data->laststype = PL_laststype;
		3122	data->laststatval = PL_laststatval;
		3123	data->statcache = PL_statcache;
		3124	}
		3125
		3126	/* now build the result vector out of all the parameters and the data_sv */
		3127	{
		3128	int i;
		3129
		3130	for (i = 0; i < items; ++i)
		3131	av_push (state, SvREFCNT_inc_NN (ST (i)));
		3132	}
		3133
		3134	av_push (state, data_sv);
		3135
		3136	api_ready (aTHX_ coro);
		3137	SvREFCNT_dec (coro);
		3138	SvREFCNT_dec ((AV *)state);
		3139	}
		3140
		3141	static int
		3142	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		3143	{
		3144	AV *state = (AV *)frame->data;
		3145
		3146	/* if we are about to throw, return early */
		3147	/* this does not cancel the aio request, but at least */
		3148	/* it quickly returns */
		3149	if (CORO_THROW)
		3150	return 0;
		3151
		3152	/* one element that is an RV? repeat! */
		3153	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		3154	return 1;
		3155
		3156	/* restore status */
		3157	{
		3158	SV *data_sv = av_pop (state);
		3159	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		3160
		3161	errno = data->errorno;
		3162	PL_laststype = data->laststype;
		3163	PL_laststatval = data->laststatval;
		3164	PL_statcache = data->statcache;
		3165
		3166	SvREFCNT_dec (data_sv);
		3167	}
		3168
		3169	/* push result values */
		3170	{
		3171	dSP;
		3172	int i;
		3173
		3174	EXTEND (SP, AvFILLp (state) + 1);
		3175	for (i = 0; i <= AvFILLp (state); ++i)
		3176	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		3177
		3178	PUTBACK;
		3179	}
		3180
		3181	return 0;
		3182	}
		3183
		3184	static void
		3185	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		3186	{
		3187	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		3188	SV *coro_hv = SvRV (coro_current);
		3189	struct coro *coro = SvSTATE_hv (coro_hv);
		3190
		3191	/* put our coroutine id on the state arg */
		3192	av_push (state, SvREFCNT_inc_NN (coro_hv));
		3193
		3194	/* first see whether we have a non-zero priority and set it as AIO prio */
		3195	if (coro->prio)
		3196	{
		3197	dSP;
		3198
		3199	static SV *prio_cv;
		3200	static SV *prio_sv;
		3201
		3202	if (ecb_expect_false (!prio_cv))
		3203	{
		3204	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		3205	prio_sv = newSViv (0);
		3206	}
		3207
		3208	PUSHMARK (SP);
		3209	sv_setiv (prio_sv, coro->prio);
		3210	XPUSHs (prio_sv);
		3211
		3212	PUTBACK;
		3213	call_sv (prio_cv, G_VOID | G_DISCARD);
		3214	}
		3215
		3216	/* now call the original request */
		3217	{
		3218	dSP;
		3219	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		3220	int i;
		3221
		3222	PUSHMARK (SP);
		3223
		3224	/* first push all args to the stack */
		3225	EXTEND (SP, items + 1);
		3226
		3227	for (i = 0; i < items; ++i)
		3228	PUSHs (arg [i]);
		3229
		3230	/* now push the callback closure */
		3231	PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		3232
		3233	/* now call the AIO function - we assume our request is uncancelable */
		3234	PUTBACK;
		3235	call_sv ((SV *)req, G_VOID | G_DISCARD);
		3236	}
		3237
		3238	/* now that the request is going, we loop till we have a result */
		3239	frame->data = (void *)state;
		3240	frame->prepare = prepare_schedule;
		3241	frame->check = slf_check_aio_req;
		3242	}
		3243
		3244	static void
		3245	coro_aio_req_xs (pTHX_ CV *cv)
		3246	{
		3247	dXSARGS;
		3248
		3249	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		3250
		3251	XSRETURN_EMPTY;
		3252	}
		3253
		3254	/*****************************************************************************/
		3255
		3256	#if CORO_CLONE
		3257	# include "clone.c"
		3258	#endif
		3259
		3260	/*****************************************************************************/
		3261
		3262	static SV *
		3263	coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
		3264	{
		3265	SV *coro_sv;
		3266	struct coro *coro;
		3267	MAGIC *mg;
		3268	HV *hv;
		3269	SV *cb;
		3270	int i;
		3271
		3272	if (argc > 0)
		3273	{
		3274	cb = s_get_cv_croak (argv [0]);
		3275
		3276	if (!is_coro)
		3277	{
		3278	if (CvISXSUB (cb))
		3279	croak ("Coro::State doesn't support XS functions as coroutine start, caught");
		3280
		3281	if (!CvROOT (cb))
		3282	croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
		3283	}
		3284	}
		3285
		3286	Newz (0, coro, 1, struct coro);
		3287	coro->args = newAV ();
		3288	coro->flags = CF_NEW;
		3289
		3290	if (coro_first) coro_first->prev = coro;
		3291	coro->next = coro_first;
		3292	coro_first = coro;
		3293
		3294	coro->hv = hv = newHV ();
		3295	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		3296	mg->mg_flags |= MGf_DUP;
		3297	coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
		3298
		3299	if (argc > 0)
		3300	{
		3301	av_extend (coro->args, argc + is_coro - 1);
		3302
		3303	if (is_coro)
		3304	{
		3305	av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
		3306	cb = (SV *)cv_coro_run;
		3307	}
		3308
		3309	coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
		3310
		3311	for (i = 1; i < argc; i++)
		3312	av_push (coro->args, newSVsv (argv [i]));
		3313	}
		3314
		3315	return coro_sv;
		3316	}
		3317
		3318	#ifndef __cplusplus
		3319	ecb_cold XS(boot_Coro__State);
		3320	#endif
		3321
		3322	#if CORO_JIT
		3323
		3324	static void ecb_noinline ecb_cold
		3325	pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
		3326	{
		3327	dSP;
		3328	AV *av = newAV ();
		3329
		3330	av_store (av, 3, newSVuv (d));
		3331	av_store (av, 2, newSVuv (c));
		3332	av_store (av, 1, newSVuv (b));
		3333	av_store (av, 0, newSVuv (a));
		3334
		3335	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		3336
		3337	PUTBACK;
		3338	}
		3339
		3340	static void ecb_noinline ecb_cold
		3341	jit_init (pTHX)
		3342	{
		3343	dSP;
		3344	SV *load, *save;
		3345	char *map_base;
		3346	char *load_ptr, *save_ptr;
		3347	STRLEN load_len, save_len, map_len;
		3348	int count;
		3349
		3350	eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
		3351
		3352	PUSHMARK (SP);
		3353	#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
		3354	#include "state.h"
		3355	count = call_pv ("Coro::State::_jit", G_ARRAY);
		3356	SPAGAIN;
		3357
		3358	save = POPs; save_ptr = SvPVbyte (save, save_len);
		3359	load = POPs; load_ptr = SvPVbyte (load, load_len);
		3360
		3361	map_len = load_len + save_len + 16;
		3362
		3363	map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
		3364
		3365	assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
		3366
		3367	load_perl_slots = (load_save_perl_slots_type)map_base;
		3368	memcpy (map_base, load_ptr, load_len);
		3369
		3370	map_base += (load_len + 15) & ~15;
		3371
		3372	save_perl_slots = (load_save_perl_slots_type)map_base;
		3373	memcpy (map_base, save_ptr, save_len);
		3374
		3375	/* we are good citizens and try to make the page read-only, so the evil evil */
		3376	/* hackers might have it a bit more difficult */
		3377	mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
		3378
		3379	PUTBACK;
		3380	eval_pv ("undef &Coro::State::_jit", 1);
		3381	}
		3382
		3383	#endif
		3384
1528	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	3385	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1529		3386
1530	PROTOTYPES: DISABLE	3387	PROTOTYPES: DISABLE
1531		3388
1532	BOOT:	3389	BOOT:
1533	{	3390	{
1534	#ifdef USE_ITHREADS	3391	#ifdef USE_ITHREADS
1535	MUTEX_INIT (&coro_mutex);	3392	# if CORO_PTHREAD
		3393	coro_thx = PERL_GET_CONTEXT;
		3394	# endif
1536	#endif	3395	#endif
1537	BOOT_PAGESIZE;	3396	/* perl defines these to check for existance first, but why it doesn't */
		3397	/* just create them one at init time is not clear to me, except for */
		3398	/* programs trying to delete them, but... */
		3399	/* anyway, we declare this as invalid and make sure they are initialised here */
		3400	DEFSV;
		3401	ERRSV;
		3402
		3403	cctx_current = cctx_new_empty ();
1538		3404
1539	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	3405	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1540	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	3406	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1541	#if 0	3407
1542	orig_sigelem_get = PL_vtbl_sigelem.svt_get;	3408	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1543	PL_vtbl_sigelem.svt_get = coro_sigelem_get;	3409	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1544	#endif	3410	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		3411
1545	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);	3412	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1546	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));	3413	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1547	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));	3414	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1548		3415
1549	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	3416	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1550		3417
1551	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));	3418	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1552	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));	3419	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
…		…
1557	main_top_env = PL_top_env;	3424	main_top_env = PL_top_env;
1558		3425
1559	while (main_top_env->je_prev)	3426	while (main_top_env->je_prev)
1560	main_top_env = main_top_env->je_prev;	3427	main_top_env = main_top_env->je_prev;
1561		3428
		3429	{
		3430	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		3431
		3432	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		3433	hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
		3434
		3435	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		3436	hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
		3437	}
		3438
1562	coroapi.ver = CORO_API_VERSION;	3439	coroapi.ver = CORO_API_VERSION;
1563	coroapi.rev = CORO_API_REVISION;	3440	coroapi.rev = CORO_API_REVISION;
		3441
1564	coroapi.transfer = api_transfer;	3442	coroapi.transfer = api_transfer;
1565		3443
		3444	coroapi.sv_state = SvSTATE_;
		3445	coroapi.execute_slf = api_execute_slf;
		3446	coroapi.prepare_nop = prepare_nop;
		3447	coroapi.prepare_schedule = prepare_schedule;
		3448	coroapi.prepare_cede = prepare_cede;
		3449	coroapi.prepare_cede_notself = prepare_cede_notself;
		3450
		3451	time_init (aTHX);
		3452
1566	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	3453	assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
		3454	#if CORO_JIT
		3455	PUTBACK;
		3456	jit_init (aTHX);
		3457	SPAGAIN;
		3458	#endif
1567	}	3459	}
1568		3460
1569	SV *	3461	SV *
1570	new (char *klass, ...)	3462	new (SV *klass, ...)
		3463	ALIAS:
		3464	Coro::new = 1
1571	CODE:	3465	CODE:
1572	{	3466	RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1573	struct coro *coro;
1574	MAGIC *mg;
1575	HV *hv;
1576	int i;
1577
1578	Newz (0, coro, 1, struct coro);
1579	coro->args = newAV ();
1580	coro->flags = CF_NEW;
1581
1582	if (coro_first) coro_first->prev = coro;
1583	coro->next = coro_first;
1584	coro_first = coro;
1585
1586	coro->hv = hv = newHV ();
1587	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1588	mg->mg_flags |= MGf_DUP;
1589	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1590
1591	av_extend (coro->args, items - 1);
1592	for (i = 1; i < items; i++)
1593	av_push (coro->args, newSVsv (ST (i)));
1594	}
1595	OUTPUT:
1596	RETVAL
1597
1598	# these not obviously related functions are all rolled into the same xs
1599	# function to increase chances that they all will call transfer with the same
1600	# stack offset
1601	void
1602	_set_stacklevel (...)
1603	ALIAS:
1604	Coro::State::transfer = 1
1605	Coro::schedule = 2
1606	Coro::cede = 3
1607	Coro::cede_notself = 4
1608	CODE:
1609	{
1610	struct transfer_args ta;
1611
1612	switch (ix)
1613	{
1614	case 0:
1615	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1616	ta.next = 0;
1617	break;
1618
1619	case 1:
1620	if (items != 2)
1621	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1622
1623	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1624	break;
1625
1626	case 2:
1627	prepare_schedule (aTHX_ &ta);
1628	break;
1629
1630	case 3:
1631	prepare_cede (aTHX_ &ta);
1632	break;
1633
1634	case 4:
1635	if (!prepare_cede_notself (aTHX_ &ta))
1636	XSRETURN_EMPTY;
1637
1638	break;
1639	}
1640
1641	BARRIER;
1642	PUTBACK;
1643	TRANSFER (ta);
1644	SPAGAIN; /* might be the sp of a different coroutine now */
1645	/* be extra careful not to ever do anything after TRANSFER */
1646	}
1647
1648	bool
1649	_destroy (SV *coro_sv)
1650	CODE:
1651	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1652	OUTPUT:	3467	OUTPUT:
1653	RETVAL	3468	RETVAL
1654		3469
1655	void	3470	void
1656	_exit (code)	3471	transfer (...)
1657	int code
1658	PROTOTYPE: $	3472	PROTOTYPE: $$
1659	CODE:	3473	CODE:
1660	_exit (code);	3474	CORO_EXECUTE_SLF_XS (slf_init_transfer);
		3475
		3476	SV *
		3477	clone (Coro::State coro)
		3478	CODE:
		3479	{
		3480	#if CORO_CLONE
		3481	struct coro *ncoro = coro_clone (aTHX_ coro);
		3482	MAGIC *mg;
		3483	/* TODO: too much duplication */
		3484	ncoro->hv = newHV ();
		3485	mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
		3486	mg->mg_flags |= MGf_DUP;
		3487	RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
		3488	#else
		3489	croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
		3490	#endif
		3491	}
		3492	OUTPUT:
		3493	RETVAL
1661		3494
1662	int	3495	int
1663	cctx_stacksize (int new_stacksize = 0)	3496	cctx_stacksize (int new_stacksize = 0)
		3497	PROTOTYPE: ;$
1664	CODE:	3498	CODE:
1665	RETVAL = coro_stacksize;	3499	RETVAL = cctx_stacksize;
1666	if (new_stacksize)	3500	if (new_stacksize)
		3501	{
1667	coro_stacksize = new_stacksize;	3502	cctx_stacksize = new_stacksize;
		3503	++cctx_gen;
		3504	}
1668	OUTPUT:	3505	OUTPUT:
1669	RETVAL	3506	RETVAL
1670		3507
1671	int	3508	int
		3509	cctx_max_idle (int max_idle = 0)
		3510	PROTOTYPE: ;$
		3511	CODE:
		3512	RETVAL = cctx_max_idle;
		3513	if (max_idle > 1)
		3514	cctx_max_idle = max_idle;
		3515	OUTPUT:
		3516	RETVAL
		3517
		3518	int
1672	cctx_count ()	3519	cctx_count ()
		3520	PROTOTYPE:
1673	CODE:	3521	CODE:
1674	RETVAL = cctx_count;	3522	RETVAL = cctx_count;
1675	OUTPUT:	3523	OUTPUT:
1676	RETVAL	3524	RETVAL
1677		3525
1678	int	3526	int
1679	cctx_idle ()	3527	cctx_idle ()
		3528	PROTOTYPE:
1680	CODE:	3529	CODE:
1681	RETVAL = cctx_idle;	3530	RETVAL = cctx_idle;
1682	OUTPUT:	3531	OUTPUT:
1683	RETVAL	3532	RETVAL
1684		3533
1685	void	3534	void
1686	list ()	3535	list ()
		3536	PROTOTYPE:
1687	PPCODE:	3537	PPCODE:
1688	{	3538	{
1689	struct coro *coro;	3539	struct coro *coro;
1690	for (coro = coro_first; coro; coro = coro->next)	3540	for (coro = coro_first; coro; coro = coro->next)
1691	if (coro->hv)	3541	if (coro->hv)
1692	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));	3542	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1693	}	3543	}
1694		3544
…		…
1696	call (Coro::State coro, SV *coderef)	3546	call (Coro::State coro, SV *coderef)
1697	ALIAS:	3547	ALIAS:
1698	eval = 1	3548	eval = 1
1699	CODE:	3549	CODE:
1700	{	3550	{
1701	if (coro->mainstack)	3551	if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1702	{	3552	{
1703	struct coro temp;	3553	struct coro *current = SvSTATE_current;
		3554	struct CoroSLF slf_save;
1704		3555
1705	if (!(coro->flags & CF_RUNNING))	3556	if (current != coro)
1706	{	3557	{
		3558	PUTBACK;
1707	save_perl (aTHX_ &temp);	3559	save_perl (aTHX_ current);
1708	load_perl (aTHX_ coro);	3560	load_perl (aTHX_ coro);
		3561	/* the coro is most likely in an active SLF call.
		3562	* while not strictly required (the code we execute is
		3563	* not allowed to call any SLF functions), it's cleaner
		3564	* to reinitialise the slf_frame and restore it later.
		3565	* This might one day allow us to actually do SLF calls
		3566	* from code executed here.
		3567	*/
		3568	slf_save = slf_frame;
		3569	slf_frame.prepare = 0;
		3570	SPAGAIN;
1709	}	3571	}
1710		3572
1711	{
1712	dSP;
1713	ENTER;
1714	SAVETMPS;
1715	PUTBACK;
1716	PUSHSTACK;	3573	PUSHSTACK;
		3574
1717	PUSHMARK (SP);	3575	PUSHMARK (SP);
		3576	PUTBACK;
1718		3577
1719	if (ix)	3578	if (ix)
1720	eval_sv (coderef, 0);	3579	eval_sv (coderef, 0);
1721	else	3580	else
1722	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	3581	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1723		3582
1724	POPSTACK;	3583	POPSTACK;
1725	SPAGAIN;	3584	SPAGAIN;
1726	FREETMPS;
1727	LEAVE;
1728	PUTBACK;
1729	}
1730		3585
1731	if (!(coro->flags & CF_RUNNING))	3586	if (current != coro)
1732	{	3587	{
		3588	PUTBACK;
		3589	slf_frame = slf_save;
1733	save_perl (aTHX_ coro);	3590	save_perl (aTHX_ coro);
1734	load_perl (aTHX_ &temp);	3591	load_perl (aTHX_ current);
		3592	SPAGAIN;
1735	}	3593	}
1736	}	3594	}
1737	}	3595	}
1738		3596
1739	SV *	3597	SV *
…		…
1741	PROTOTYPE: $	3599	PROTOTYPE: $
1742	ALIAS:	3600	ALIAS:
1743	is_ready = CF_READY	3601	is_ready = CF_READY
1744	is_running = CF_RUNNING	3602	is_running = CF_RUNNING
1745	is_new = CF_NEW	3603	is_new = CF_NEW
1746	is_destroyed = CF_DESTROYED	3604	is_destroyed = CF_ZOMBIE
		3605	is_zombie = CF_ZOMBIE
		3606	is_suspended = CF_SUSPENDED
1747	CODE:	3607	CODE:
1748	RETVAL = boolSV (coro->flags & ix);	3608	RETVAL = boolSV (coro->flags & ix);
1749	OUTPUT:	3609	OUTPUT:
1750	RETVAL	3610	RETVAL
1751		3611
1752	void	3612	void
		3613	throw (SV *self, SV *exception = &PL_sv_undef)
		3614	PROTOTYPE: $;$
		3615	CODE:
		3616	{
		3617	struct coro *coro = SvSTATE (self);
		3618	struct coro *current = SvSTATE_current;
		3619	SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
		3620	SvREFCNT_dec (*exceptionp);
		3621	SvGETMAGIC (exception);
		3622	*exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
		3623
		3624	api_ready (aTHX_ self);
		3625	}
		3626
		3627	void
1753	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	3628	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		3629	PROTOTYPE: $;$
		3630	C_ARGS: aTHX_ coro, flags
1754		3631
1755	SV *	3632	SV *
1756	has_stack (Coro::State coro)	3633	has_cctx (Coro::State coro)
1757	PROTOTYPE: $	3634	PROTOTYPE: $
1758	CODE:	3635	CODE:
1759	RETVAL = boolSV (!!coro->cctx);	3636	/* maybe manage the running flag differently */
		3637	RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1760	OUTPUT:	3638	OUTPUT:
1761	RETVAL	3639	RETVAL
1762		3640
1763	int	3641	int
1764	is_traced (Coro::State coro)	3642	is_traced (Coro::State coro)
…		…
1766	CODE:	3644	CODE:
1767	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	3645	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1768	OUTPUT:	3646	OUTPUT:
1769	RETVAL	3647	RETVAL
1770		3648
1771	IV	3649	UV
1772	rss (Coro::State coro)	3650	rss (Coro::State coro)
1773	PROTOTYPE: $	3651	PROTOTYPE: $
1774	ALIAS:	3652	ALIAS:
1775	usecount = 1	3653	usecount = 1
1776	CODE:	3654	CODE:
…		…
1780	case 1: RETVAL = coro->usecount; break;	3658	case 1: RETVAL = coro->usecount; break;
1781	}	3659	}
1782	OUTPUT:	3660	OUTPUT:
1783	RETVAL	3661	RETVAL
1784		3662
		3663	void
		3664	force_cctx ()
		3665	PROTOTYPE:
		3666	CODE:
		3667	cctx_current->idle_sp = 0;
		3668
		3669	void
		3670	swap_defsv (Coro::State self)
		3671	PROTOTYPE: $
		3672	ALIAS:
		3673	swap_defav = 1
		3674	CODE:
		3675	if (!self->slot)
		3676	croak ("cannot swap state with coroutine that has no saved state,");
		3677	else
		3678	{
		3679	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		3680	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		3681
		3682	SV *tmp = *src; *src = *dst; *dst = tmp;
		3683	}
		3684
		3685	void
		3686	cancel (Coro::State self)
		3687	CODE:
		3688	coro_state_destroy (aTHX_ self);
		3689
		3690	SV *
		3691	enable_times (int enabled = enable_times)
		3692	CODE:
		3693	{
		3694	RETVAL = boolSV (enable_times);
		3695
		3696	if (enabled != enable_times)
		3697	{
		3698	enable_times = enabled;
		3699
		3700	coro_times_update ();
		3701	(enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
		3702	}
		3703	}
		3704	OUTPUT:
		3705	RETVAL
		3706
		3707	void
		3708	times (Coro::State self)
		3709	PPCODE:
		3710	{
		3711	struct coro *current = SvSTATE (coro_current);
		3712
		3713	if (ecb_expect_false (current == self))
		3714	{
		3715	coro_times_update ();
		3716	coro_times_add (SvSTATE (coro_current));
		3717	}
		3718
		3719	EXTEND (SP, 2);
		3720	PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
		3721	PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
		3722
		3723	if (ecb_expect_false (current == self))
		3724	coro_times_sub (SvSTATE (coro_current));
		3725	}
		3726
		3727	void
		3728	swap_sv (Coro::State coro, SV *sv, SV *swapsv)
		3729	CODE:
		3730	{
		3731	struct coro *current = SvSTATE_current;
		3732
		3733	if (current == coro)
		3734	SWAP_SVS (current);
		3735
		3736	if (!coro->swap_sv)
		3737	coro->swap_sv = newAV ();
		3738
		3739	av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
		3740	av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
		3741
		3742	if (current == coro)
		3743	SWAP_SVS (current);
		3744	}
		3745
1785		3746
1786	MODULE = Coro::State PACKAGE = Coro	3747	MODULE = Coro::State PACKAGE = Coro
1787		3748
1788	BOOT:	3749	BOOT:
1789	{	3750	{
1790	int i;
1791
1792	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);	3751	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1793	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);	3752	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		3753	cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
		3754	coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1794	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);	3755	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		3756	av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
		3757	sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
		3758	sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1795		3759
1796	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);	3760	sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1797	SvREADONLY_on (coro_current);	3761	sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
		3762	cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
		3763	CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1798		3764
1799	coro_stash = gv_stashpv ("Coro", TRUE);	3765	coro_stash = gv_stashpv ("Coro", TRUE);
1800		3766
1801	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	3767	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1802	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	3768	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1803	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	3769	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1804	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	3770	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1805	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	3771	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1806	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	3772	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1807
1808	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1809	coro_ready[i] = newAV ();
1810		3773
1811	{	3774	{
1812	SV *sv = perl_get_sv ("Coro::API", TRUE);	3775	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1813	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1814		3776
1815	coroapi.schedule = api_schedule;	3777	coroapi.schedule = api_schedule;
		3778	coroapi.schedule_to = api_schedule_to;
1816	coroapi.cede = api_cede;	3779	coroapi.cede = api_cede;
1817	coroapi.cede_notself = api_cede_notself;	3780	coroapi.cede_notself = api_cede_notself;
1818	coroapi.ready = api_ready;	3781	coroapi.ready = api_ready;
1819	coroapi.is_ready = api_is_ready;	3782	coroapi.is_ready = api_is_ready;
1820	coroapi.nready = &coro_nready;	3783	coroapi.nready = coro_nready;
1821	coroapi.current = coro_current;	3784	coroapi.current = coro_current;
1822		3785
1823	GCoroAPI = &coroapi;	3786	/*GCoroAPI = &coroapi;*/
1824	sv_setiv (sv, (IV)&coroapi);	3787	sv_setiv (sv, (IV)&coroapi);
1825	SvREADONLY_on (sv);	3788	SvREADONLY_on (sv);
1826	}	3789	}
1827	}	3790	}
		3791
		3792	SV *
		3793	async (...)
		3794	PROTOTYPE: &@
		3795	CODE:
		3796	RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
		3797	api_ready (aTHX_ RETVAL);
		3798	OUTPUT:
		3799	RETVAL
		3800
		3801	void
		3802	_destroy (Coro::State coro)
		3803	CODE:
		3804	/* used by the manager thread */
		3805	coro_state_destroy (aTHX_ coro);
		3806
		3807	void
		3808	on_destroy (Coro::State coro, SV *cb)
		3809	CODE:
		3810	coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
		3811
		3812	void
		3813	join (...)
		3814	CODE:
		3815	CORO_EXECUTE_SLF_XS (slf_init_join);
		3816
		3817	void
		3818	terminate (...)
		3819	CODE:
		3820	CORO_EXECUTE_SLF_XS (slf_init_terminate);
		3821
		3822	void
		3823	cancel (...)
		3824	CODE:
		3825	CORO_EXECUTE_SLF_XS (slf_init_cancel);
		3826
		3827	int
		3828	safe_cancel (Coro::State self, ...)
		3829	C_ARGS: aTHX_ self, &ST (1), items - 1
		3830
		3831	void
		3832	schedule (...)
		3833	CODE:
		3834	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		3835
		3836	void
		3837	schedule_to (...)
		3838	CODE:
		3839	CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
		3840
		3841	void
		3842	cede_to (...)
		3843	CODE:
		3844	CORO_EXECUTE_SLF_XS (slf_init_cede_to);
		3845
		3846	void
		3847	cede (...)
		3848	CODE:
		3849	CORO_EXECUTE_SLF_XS (slf_init_cede);
		3850
		3851	void
		3852	cede_notself (...)
		3853	CODE:
		3854	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1828		3855
1829	void	3856	void
1830	_set_current (SV *current)	3857	_set_current (SV *current)
1831	PROTOTYPE: $	3858	PROTOTYPE: $
1832	CODE:	3859	CODE:
1833	SvREFCNT_dec (SvRV (coro_current));	3860	SvREFCNT_dec (SvRV (coro_current));
1834	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	3861	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
		3862
		3863	void
		3864	_set_readyhook (SV *hook)
		3865	PROTOTYPE: $
		3866	CODE:
		3867	SvREFCNT_dec (coro_readyhook);
		3868	SvGETMAGIC (hook);
		3869	if (SvOK (hook))
		3870	{
		3871	coro_readyhook = newSVsv (hook);
		3872	CORO_READYHOOK = invoke_sv_ready_hook_helper;
		3873	}
		3874	else
		3875	{
		3876	coro_readyhook = 0;
		3877	CORO_READYHOOK = 0;
		3878	}
1835		3879
1836	int	3880	int
1837	prio (Coro::State coro, int newprio = 0)	3881	prio (Coro::State coro, int newprio = 0)
		3882	PROTOTYPE: $;$
1838	ALIAS:	3883	ALIAS:
1839	nice = 1	3884	nice = 1
1840	CODE:	3885	CODE:
1841	{	3886	{
1842	RETVAL = coro->prio;	3887	RETVAL = coro->prio;
…		…
1844	if (items > 1)	3889	if (items > 1)
1845	{	3890	{
1846	if (ix)	3891	if (ix)
1847	newprio = coro->prio - newprio;	3892	newprio = coro->prio - newprio;
1848		3893
1849	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	3894	if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1850	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	3895	if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1851		3896
1852	coro->prio = newprio;	3897	coro->prio = newprio;
1853	}	3898	}
1854	}	3899	}
1855	OUTPUT:	3900	OUTPUT:
…		…
1857		3902
1858	SV *	3903	SV *
1859	ready (SV *self)	3904	ready (SV *self)
1860	PROTOTYPE: $	3905	PROTOTYPE: $
1861	CODE:	3906	CODE:
1862	RETVAL = boolSV (api_ready (self));	3907	RETVAL = boolSV (api_ready (aTHX_ self));
1863	OUTPUT:	3908	OUTPUT:
1864	RETVAL	3909	RETVAL
1865		3910
1866	int	3911	int
1867	nready (...)	3912	nready (...)
…		…
1870	RETVAL = coro_nready;	3915	RETVAL = coro_nready;
1871	OUTPUT:	3916	OUTPUT:
1872	RETVAL	3917	RETVAL
1873		3918
1874	void	3919	void
1875	throw (Coro::State self, SV *throw = &PL_sv_undef)	3920	suspend (Coro::State self)
1876	PROTOTYPE: $;$	3921	PROTOTYPE: $
1877	CODE:	3922	CODE:
1878	SvREFCNT_dec (self->throw);	3923	self->flags |= CF_SUSPENDED;
1879	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1880		3924
1881	# for async_pool speedup
1882	void	3925	void
1883	_pool_1 (SV *cb)	3926	resume (Coro::State self)
		3927	PROTOTYPE: $
1884	CODE:	3928	CODE:
1885	{	3929	self->flags &= ~CF_SUSPENDED;
1886	struct coro *coro = SvSTATE (coro_current);
1887	HV *hv = (HV *)SvRV (coro_current);
1888	AV *defav = GvAV (PL_defgv);
1889	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1890	AV *invoke_av;
1891	int i, len;
1892		3930
1893	if (!invoke)	3931	void
1894	croak ("\3async_pool terminate\2\n");	3932	_pool_handler (...)
		3933	CODE:
		3934	CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1895		3935
1896	SvREFCNT_dec (coro->saved_deffh);	3936	void
1897	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);	3937	async_pool (SV *cv, ...)
		3938	PROTOTYPE: &@
		3939	PPCODE:
		3940	{
		3941	HV *hv = (HV *)av_pop (av_async_pool);
		3942	AV *av = newAV ();
		3943	SV *cb = ST (0);
		3944	int i;
1898		3945
1899	hv_store (hv, "desc", sizeof ("desc") - 1,	3946	av_extend (av, items - 2);
1900	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	3947	for (i = 1; i < items; ++i)
		3948	av_push (av, SvREFCNT_inc_NN (ST (i)));
1901		3949
1902	invoke_av = (AV *)SvRV (invoke);	3950	if ((SV *)hv == &PL_sv_undef)
1903	len = av_len (invoke_av);
1904
1905	sv_setsv (cb, AvARRAY (invoke_av)[0]);
1906
1907	if (len > 0)
1908	{	3951	{
1909	av_fill (defav, len - 1);	3952	SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1910	for (i = 0; i < len; ++i)	3953	hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1911	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));	3954	SvREFCNT_dec (sv);
1912	}	3955	}
1913		3956
		3957	{
		3958	struct coro *coro = SvSTATE_hv (hv);
		3959
		3960	assert (!coro->invoke_cb);
		3961	assert (!coro->invoke_av);
		3962	coro->invoke_cb = SvREFCNT_inc (cb);
		3963	coro->invoke_av = av;
		3964	}
		3965
		3966	api_ready (aTHX_ (SV *)hv);
		3967
		3968	if (GIMME_V != G_VOID)
		3969	XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
		3970	else
1914	SvREFCNT_dec (invoke);	3971	SvREFCNT_dec (hv);
1915	}	3972	}
1916		3973
1917	void	3974	SV *
1918	_pool_2 (SV *cb)	3975	rouse_cb ()
		3976	PROTOTYPE:
1919	CODE:	3977	CODE:
1920	{	3978	RETVAL = coro_new_rouse_cb (aTHX);
1921	struct coro *coro = SvSTATE (coro_current);
1922
1923	sv_setsv (cb, &PL_sv_undef);
1924
1925	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1926	coro->saved_deffh = 0;
1927
1928	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1929	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1930	croak ("\3async_pool terminate\2\n");
1931
1932	av_clear (GvAV (PL_defgv));
1933	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1934	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1935
1936	coro->prio = 0;
1937
1938	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1939	api_trace (coro_current, 0);
1940
1941	av_push (av_async_pool, newSVsv (coro_current));
1942	}
1943
1944
1945	MODULE = Coro::State PACKAGE = Coro::AIO
1946
1947	SV *
1948	_get_state ()
1949	CODE:
1950	{
1951	struct io_state *data;
1952
1953	RETVAL = newSV (sizeof (struct io_state));
1954	data = (struct io_state *)SvPVX (RETVAL);
1955	SvCUR_set (RETVAL, sizeof (struct io_state));
1956	SvPOK_only (RETVAL);
1957
1958	data->errorno = errno;
1959	data->laststype = PL_laststype;
1960	data->laststatval = PL_laststatval;
1961	data->statcache = PL_statcache;
1962	}
1963	OUTPUT:	3979	OUTPUT:
1964	RETVAL	3980	RETVAL
1965		3981
1966	void	3982	void
1967	_set_state (char *data_)	3983	rouse_wait (...)
		3984	PROTOTYPE: ;$
		3985	PPCODE:
		3986	CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
		3987
		3988	void
		3989	on_enter (SV *block)
		3990	ALIAS:
		3991	on_leave = 1
1968	PROTOTYPE: $	3992	PROTOTYPE: &
1969	CODE:	3993	CODE:
1970	{	3994	{
1971	struct io_state *data = (void *)data_;	3995	struct coro *coro = SvSTATE_current;
		3996	AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1972		3997
1973	errno = data->errorno;	3998	block = s_get_cv_croak (block);
1974	PL_laststype = data->laststype;
1975	PL_laststatval = data->laststatval;
1976	PL_statcache = data->statcache;
1977	}
1978		3999
		4000	if (!*avp)
		4001	*avp = newAV ();
		4002
		4003	av_push (*avp, SvREFCNT_inc (block));
		4004
		4005	if (!ix)
		4006	on_enterleave_call (aTHX_ block);
		4007
		4008	LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
		4009	SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
		4010	ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
		4011	}
		4012
		4013
		4014	MODULE = Coro::State PACKAGE = PerlIO::cede
		4015
		4016	BOOT:
		4017	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		4018
		4019
		4020	MODULE = Coro::State PACKAGE = Coro::Semaphore
		4021
		4022	SV *
		4023	new (SV *klass, SV *count = 0)
		4024	CODE:
		4025	{
		4026	int semcnt = 1;
		4027
		4028	if (count)
		4029	{
		4030	SvGETMAGIC (count);
		4031
		4032	if (SvOK (count))
		4033	semcnt = SvIV (count);
		4034	}
		4035
		4036	RETVAL = sv_bless (
		4037	coro_waitarray_new (aTHX_ semcnt),
		4038	GvSTASH (CvGV (cv))
		4039	);
		4040	}
		4041	OUTPUT:
		4042	RETVAL
		4043
		4044	# helper for Coro::Channel and others
		4045	SV *
		4046	_alloc (int count)
		4047	CODE:
		4048	RETVAL = coro_waitarray_new (aTHX_ count);
		4049	OUTPUT:
		4050	RETVAL
		4051
		4052	SV *
		4053	count (SV *self)
		4054	CODE:
		4055	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		4056	OUTPUT:
		4057	RETVAL
		4058
		4059	void
		4060	up (SV *self, int adjust = 1)
		4061	ALIAS:
		4062	adjust = 1
		4063	CODE:
		4064	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		4065
		4066	void
		4067	down (...)
		4068	CODE:
		4069	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		4070
		4071	void
		4072	wait (...)
		4073	CODE:
		4074	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
		4075
		4076	void
		4077	try (SV *self)
		4078	PPCODE:
		4079	{
		4080	AV *av = (AV *)SvRV (self);
		4081	SV *count_sv = AvARRAY (av)[0];
		4082	IV count = SvIVX (count_sv);
		4083
		4084	if (count > 0)
		4085	{
		4086	--count;
		4087	SvIVX (count_sv) = count;
		4088	XSRETURN_YES;
		4089	}
		4090	else
		4091	XSRETURN_NO;
		4092	}
		4093
		4094	void
		4095	waiters (SV *self)
		4096	PPCODE:
		4097	{
		4098	AV *av = (AV *)SvRV (self);
		4099	int wcount = AvFILLp (av) + 1 - 1;
		4100
		4101	if (GIMME_V == G_SCALAR)
		4102	XPUSHs (sv_2mortal (newSViv (wcount)));
		4103	else
		4104	{
		4105	int i;
		4106	EXTEND (SP, wcount);
		4107	for (i = 1; i <= wcount; ++i)
		4108	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
		4109	}
		4110	}
		4111
		4112	MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
		4113
		4114	void
		4115	_may_delete (SV *sem, int count, unsigned int extra_refs)
		4116	PPCODE:
		4117	{
		4118	AV *av = (AV *)SvRV (sem);
		4119
		4120	if (SvREFCNT ((SV *)av) == 1 + extra_refs
		4121	&& AvFILLp (av) == 0 /* no waiters, just count */
		4122	&& SvIV (AvARRAY (av)[0]) == count)
		4123	XSRETURN_YES;
		4124
		4125	XSRETURN_NO;
		4126	}
		4127
		4128	MODULE = Coro::State PACKAGE = Coro::Signal
		4129
		4130	SV *
		4131	new (SV *klass)
		4132	CODE:
		4133	RETVAL = sv_bless (
		4134	coro_waitarray_new (aTHX_ 0),
		4135	GvSTASH (CvGV (cv))
		4136	);
		4137	OUTPUT:
		4138	RETVAL
		4139
		4140	void
		4141	wait (...)
		4142	CODE:
		4143	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		4144
		4145	void
		4146	broadcast (SV *self)
		4147	CODE:
		4148	{
		4149	AV *av = (AV *)SvRV (self);
		4150	coro_signal_wake (aTHX_ av, AvFILLp (av));
		4151	}
		4152
		4153	void
		4154	send (SV *self)
		4155	CODE:
		4156	{
		4157	AV *av = (AV *)SvRV (self);
		4158
		4159	if (AvFILLp (av))
		4160	coro_signal_wake (aTHX_ av, 1);
		4161	else
		4162	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
		4163	}
		4164
		4165	IV
		4166	awaited (SV *self)
		4167	CODE:
		4168	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		4169	OUTPUT:
		4170	RETVAL
		4171
		4172
		4173	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		4174
		4175	BOOT:
		4176	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		4177
		4178	void
		4179	_schedule (...)
		4180	CODE:
		4181	{
		4182	static int incede;
		4183
		4184	api_cede_notself (aTHX);
		4185
		4186	++incede;
		4187	while (coro_nready >= incede && api_cede (aTHX))
		4188	;
		4189
		4190	sv_setsv (sv_activity, &PL_sv_undef);
		4191	if (coro_nready >= incede)
		4192	{
		4193	PUSHMARK (SP);
		4194	PUTBACK;
		4195	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		4196	}
		4197
		4198	--incede;
		4199	}
		4200
		4201
		4202	MODULE = Coro::State PACKAGE = Coro::AIO
		4203
		4204	void
		4205	_register (char *target, char *proto, SV *req)
		4206	CODE:
		4207	{
		4208	SV *req_cv = s_get_cv_croak (req);
		4209	/* newXSproto doesn't return the CV on 5.8 */
		4210	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		4211	sv_setpv ((SV *)slf_cv, proto);
		4212	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		4213	}
		4214
		4215	MODULE = Coro::State PACKAGE = Coro::Select
		4216
		4217	void
		4218	patch_pp_sselect ()
		4219	CODE:
		4220	if (!coro_old_pp_sselect)
		4221	{
		4222	coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
		4223	coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
		4224	PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
		4225	}
		4226
		4227	void
		4228	unpatch_pp_sselect ()
		4229	CODE:
		4230	if (coro_old_pp_sselect)
		4231	{
		4232	PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
		4233	coro_old_pp_sselect = 0;
		4234	}
		4235
		4236	MODULE = Coro::State PACKAGE = Coro::Util
		4237
		4238	void
		4239	_exit (int code)
		4240	CODE:
		4241	_exit (code);
		4242
		4243	NV
		4244	time ()
		4245	CODE:
		4246	RETVAL = nvtime (aTHX);
		4247	OUTPUT:
		4248	RETVAL
		4249
		4250	NV
		4251	gettimeofday ()
		4252	PPCODE:
		4253	{
		4254	UV tv [2];
		4255	u2time (aTHX_ tv);
		4256	EXTEND (SP, 2);
		4257	PUSHs (sv_2mortal (newSVuv (tv [0])));
		4258	PUSHs (sv_2mortal (newSVuv (tv [1])));
		4259	}
		4260

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