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Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.436 by root, Tue Nov 5 14:38:46 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
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
12# ifndef PL_ppaddr 19#include "ecb.h"
13# define PL_ppaddr ppaddr
14# endif
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 20
21#include <stddef.h>
32#include <stdio.h> 22#include <stdio.h>
33#include <errno.h> 23#include <errno.h>
34
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD
37#endif
38
39#ifndef STACKGUARD
40# define STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h> 24#include <assert.h>
45# include <sys/mman.h> 25
46# ifndef MAP_ANONYMOUS 26#ifndef SVs_PADSTALE
47# ifdef MAP_ANON 27# define SVs_PADSTALE 0
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
52# endif 38# endif
53# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
54# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
55# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
57static long pagesize; 43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
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 */
58# else 53#else
59# define BOOT_PAGESIZE 54# include <inttypes.h> /* most portable stdint.h */
55#endif
56
57/* the maximum number of idle cctx that will be pooled */
58static int cctx_max_idle = 4;
59
60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
61# define HAS_SCOPESTACK_NAME 1
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
77#endif
78
79#define IN_DESTRUCT PL_dirty
80
81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
83
84#ifdef USE_ITHREADS
85# if CORO_PTHREAD
86static void *coro_thx;
60# endif 87# endif
61#endif 88#endif
62 89
63/* The next macro should declare a variable stacklevel that contains and approximation 90#ifdef __linux
64 * to the current C stack pointer. Its property is that it changes with each call 91# include <time.h> /* for timespec */
65 * and should be unique. */ 92# include <syscall.h> /* for SYS_* */
66#define dSTACKLEVEL int stacklevel 93# ifdef SYS_clock_gettime
67#define STACKLEVEL ((void *)&stacklevel) 94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
68 95# define CORO_CLOCK_MONOTONIC 1
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
70
71#define labs(l) ((l) >= 0 ? (l) : -(l))
72
73#include "CoroAPI.h"
74
75#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76
77#ifdef USE_ITHREADS
78static perl_mutex coro_mutex;
79# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81#else
82# define LOCK (void)0
83# define UNLOCK (void)0
84#endif 97# endif
98#endif
85 99
100static double (*nvtime)(); /* so why doesn't it take void? */
101static void (*u2time)(pTHX_ UV ret[2]);
102
103/* we hijack an hopefully unused CV flag for our purposes */
104#define CVf_SLF 0x4000
105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
107
108static U32 cctx_gen;
109static size_t cctx_stacksize = CORO_STACKSIZE;
86static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
87static AV *main_mainstack; /* used to differentiate between $main and others */ 111static AV *main_mainstack; /* used to differentiate between $main and others */
112static JMPENV *main_top_env;
88static HV *coro_state_stash, *coro_stash; 113static HV *coro_state_stash, *coro_stash;
89static SV *coro_mortal; /* will be freed after next transfer */ 114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
119
120static GV *irsgv; /* $/ */
121static GV *stdoutgv; /* *STDOUT */
122static SV *rv_diehook;
123static SV *rv_warnhook;
124static HV *hv_sig; /* %SIG */
125
126/* async_pool helper stuff */
127static SV *sv_pool_rss;
128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
133
134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
142
143static struct coro_cctx *cctx_first;
144static int cctx_count, cctx_idle;
145
146enum
147{
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
90 155
91/* this is a structure representing a c-level coroutine */ 156/* this is a structure representing a c-level coroutine */
92typedef struct coro_stack { 157typedef struct coro_cctx
158{
93 struct coro_stack *next; 159 struct coro_cctx *next;
94 160
95 void *idle_sp; /* original stacklevel when coroutine was created */ 161 /* the stack */
96 void *sptr; 162 struct coro_stack stack;
97 long ssize; /* positive == mmap, otherwise malloc */
98 163
99 /* cpu state */ 164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
169 JMPENV *top_env;
100 coro_context cctx; 170 coro_context cctx;
101 JMPENV *top_env;
102} coro_stack;
103 171
104/* the (fake) coro_stack representing the main program */ 172 U32 gen;
105static coro_stack *main_stack; 173#if CORO_USE_VALGRIND
174 int valgrind_id;
175#endif
176 unsigned char flags;
177} coro_cctx;
178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
185enum
186{
187 CF_RUNNING = 0x0001, /* coroutine is running */
188 CF_READY = 0x0002, /* coroutine is ready */
189 CF_NEW = 0x0004, /* has never been switched to */
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) */
193};
194
195/* the structure where most of the perl state is stored, overlaid on the cxstack */
196typedef struct
197{
198 #define VARx(name,expr,type) type name;
199 #include "state.h"
200} perl_slots;
201
202/* how many context stack entries do we need for perl_slots */
203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
106 204
107/* this is a structure representing a perl-level coroutine */ 205/* this is a structure representing a perl-level coroutine */
108struct coro { 206struct coro
207{
109 /* the c coroutine allocated to this perl coroutine, if any */ 208 /* the C coroutine allocated to this perl coroutine, if any */
110 coro_stack *stack; 209 coro_cctx *cctx;
111 210
112 /* data associated with this coroutine (initial args) */ 211 /* ready queue */
113 AV *args; 212 struct coro *next_ready;
114 int refcnt;
115 213
116 /* optionally saved, might be zero */ 214 /* state data */
117 AV *defav; 215 struct CoroSLF slf_frame; /* saved slf frame */
118 SV *defsv;
119 SV *errsv;
120
121 /* saved global state not related to stacks */
122 U8 dowarn;
123 I32 in_eval;
124
125 /* the stacks and related info (callchain etc..) */
126 PERL_SI *curstackinfo;
127 AV *curstack;
128 AV *mainstack; 216 AV *mainstack;
129 SV **stack_sp; 217 perl_slots *slot; /* basically the saved sp */
130 OP *op; 218
131 SV **curpad; 219 CV *startcv; /* the CV to execute */
132 AV *comppad; 220 AV *args; /* data associated with this coroutine (initial args) */
133 CV *compcv; 221 int flags; /* CF_ flags */
134 SV **stack_base; 222 HV *hv; /* the perl hash associated with this coro, if any */
135 SV **stack_max; 223
136 SV **tmps_stack; 224 /* statistics */
137 I32 tmps_floor; 225 int usecount; /* number of transfers to this coro */
138 I32 tmps_ix;
139 I32 tmps_max;
140 I32 *markstack;
141 I32 *markstack_ptr;
142 I32 *markstack_max;
143 I32 *scopestack;
144 I32 scopestack_ix;
145 I32 scopestack_max;
146 ANY *savestack;
147 I32 savestack_ix;
148 I32 savestack_max;
149 OP **retstack;
150 I32 retstack_ix;
151 I32 retstack_max;
152 PMOP *curpm;
153 COP *curcop;
154 226
155 /* coro process data */ 227 /* coro process data */
156 int prio; 228 int prio;
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 */
233
234 /* async_pool */
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;
248
249 /* linked list */
250 struct coro *next, *prev;
157}; 251};
158 252
159typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
161 255
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 */
259static struct CoroSLF slf_frame; /* the current slf frame */
260
261/** Coro ********************************************************************/
262
263#define CORO_PRIO_MAX 3
264#define CORO_PRIO_HIGH 1
265#define CORO_PRIO_NORMAL 0
266#define CORO_PRIO_LOW -1
267#define CORO_PRIO_IDLE -3
268#define CORO_PRIO_MIN -4
269
270/* for Coro.pm */
271static SV *coro_current;
272static SV *coro_readyhook;
273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
275static 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
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
162static AV * 307static OP *
308coro_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
325ecb_inline void
326coro_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
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_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
372
373/** lowlevel stuff **********************************************************/
374
375static SV * ecb_noinline
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV * ecb_noinline
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV * ecb_noinline
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405ecb_inline void
406coro_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
428ecb_inline void
429coro_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
440ecb_inline void
441coro_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
471ecb_inline MAGIC *
472SvSTATEhv_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
486ecb_inline struct coro *
487SvSTATE_ (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
510ecb_inline PADLIST *
163coro_clone_padlist (pTHX_ CV *cv) 511coro_derive_padlist (pTHX_ CV *cv)
164{ 512{
165 AV *padlist = CvPADLIST (cv); 513 PADLIST *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET off = PadlistMAX (padlist) + 1;
167 517
168 newpadlist = newAV (); 518#if NEWPADAPI
519
520 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
521 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
522 while (!PadlistARRAY (padlist)[off - 1])
523 --off;
524
525 Perl_pad_push (aTHX_ padlist, off);
526
527 newpad = PadlistARRAY (padlist)[off];
528 PadlistARRAY (padlist)[off] = 0;
529
530#else
531
532#if PERL_VERSION_ATLEAST (5,10,0)
533 Perl_pad_push (aTHX_ padlist, off);
534#else
535 Perl_pad_push (aTHX_ padlist, off, 1);
536#endif
537
538 newpad = PadlistARRAY (padlist)[off];
539 PadlistMAX (padlist) = off - 1;
540
541#endif
542
543 newPADLIST (newpadlist);
544#if !PERL_VERSION_ATLEAST(5,15,3)
545 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
169 AvREAL_off (newpadlist); 546 AvREAL_off (newpadlist);
170#if PERL_VERSION < 9 547#endif
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 548
549 /* Already extended to 2 elements by newPADLIST. */
550 PadlistMAX (newpadlist) = 1;
551 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
552 PadlistARRAY (newpadlist)[1] = newpad;
553
554 return newpadlist;
555}
556
557ecb_inline void
558free_padlist (pTHX_ PADLIST *padlist)
559{
560 /* may be during global destruction */
561 if (!IN_DESTRUCT)
562 {
563 I32 i = PadlistMAX (padlist);
564
565 while (i > 0) /* special-case index 0 */
566 {
567 /* we try to be extra-careful here */
568 PAD *pad = PadlistARRAY (padlist)[i--];
569 I32 j = PadMAX (pad);
570
571 while (j >= 0)
572 SvREFCNT_dec (PadARRAY (pad)[j--]);
573
574 PadMAX (pad) = -1;
575 SvREFCNT_dec (pad);
576 }
577
578 SvREFCNT_dec (PadlistNAMES (padlist));
579
580#if NEWPADAPI
581 Safefree (PadlistARRAY (padlist));
582 Safefree (padlist);
172#else 583#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist);
177
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
179 av_store (newpadlist, 1, (SV *)newpad);
180
181 return newpadlist;
182}
183
184static void
185free_padlist (pTHX_ AV *padlist)
186{
187 /* may be during global destruction */
188 if (SvREFCNT (padlist))
189 {
190 I32 i = AvFILLp (padlist); 584 AvFILLp (padlist) = -1;
191 while (i >= 0) 585 AvREAL_off (padlist);
192 {
193 SV **svp = av_fetch (padlist, i--, FALSE);
194 if (svp)
195 {
196 SV *sv;
197 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
198 SvREFCNT_dec (sv);
199
200 SvREFCNT_dec (*svp);
201 }
202 }
203
204 SvREFCNT_dec ((SV*)padlist); 586 SvREFCNT_dec ((SV*)padlist);
587#endif
205 } 588 }
206} 589}
207 590
208static int 591static int
209coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 592coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
210{ 593{
211 AV *padlist; 594 PADLIST *padlist;
212 AV *av = (AV *)mg->mg_obj; 595 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
596 size_t len = *(size_t *)mg->mg_ptr;
213 597
214 /* casting is fun. */ 598 /* perl manages to free our internal AV and _then_ call us */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 599 if (IN_DESTRUCT)
600 return 0;
601
602 while (len--)
216 free_padlist (aTHX_ padlist); 603 free_padlist (aTHX_ padlists[len]);
217
218 SvREFCNT_dec (av);
219 604
220 return 0; 605 return 0;
221} 606}
222 607
223#define PERL_MAGIC_coro PERL_MAGIC_ext 608static MGVTBL coro_cv_vtbl = {
224 609 0, 0, 0, 0,
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 610 coro_cv_free
611};
226 612
227/* the next two functions merely cache the padlists */ 613/* the next two functions merely cache the padlists */
228static void 614ecb_inline void
229get_padlist (pTHX_ CV *cv) 615get_padlist (pTHX_ CV *cv)
230{ 616{
231 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 617 MAGIC *mg = CORO_MAGIC_cv (cv);
618 size_t *lenp;
232 619
233 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 620 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
234 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 621 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
235 else 622 else
236 { 623 {
237#if 0 624#if CORO_PREFER_PERL_FUNCTIONS
238 /* this should work - but it doesn't :( */ 625 /* this is probably cleaner? but also slower! */
626 /* in practise, it seems to be less stable */
239 CV *cp = Perl_cv_clone (aTHX_ cv); 627 CV *cp = Perl_cv_clone (aTHX_ cv);
240 CvPADLIST (cv) = CvPADLIST (cp); 628 CvPADLIST (cv) = CvPADLIST (cp);
241 CvPADLIST (cp) = 0; 629 CvPADLIST (cp) = 0;
242 SvREFCNT_dec (cp); 630 SvREFCNT_dec (cp);
243#else 631#else
244 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 632 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
245#endif 633#endif
246 } 634 }
247} 635}
248 636
249static void 637ecb_inline void
250put_padlist (pTHX_ CV *cv) 638put_padlist (pTHX_ CV *cv)
251{ 639{
252 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 640 MAGIC *mg = CORO_MAGIC_cv (cv);
253 641
254 if (!mg) 642 if (ecb_expect_false (!mg))
255 {
256 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258 mg->mg_virtual = &vtbl_coro;
259 mg->mg_obj = (SV *)newAV ();
260 } 643 {
644 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
645 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
646 mg->mg_len = 1; /* so mg_free frees mg_ptr */
647 }
648 else
649 Renew (mg->mg_ptr,
650 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
651 char);
261 652
262 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 653 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
263} 654}
264 655
265#define SB do { 656/** load & save, init *******************************************************/
266#define SE } while (0)
267 657
268#define LOAD(state) load_state(aTHX_ (state)); 658ecb_inline void
269#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 659swap_sv (SV *a, SV *b)
660{
661 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
662 SV tmp;
270 663
271#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 664 /* swap sv_any */
665 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
272 666
667 /* swap sv_flags */
668 SvFLAGS (&tmp) = SvFLAGS (a);
669 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
670 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
671
672#if PERL_VERSION_ATLEAST (5,10,0)
673 /* perl 5.10 and later complicates this _quite_ a bit, but it also
674 * is much faster, so no quarrels here. alternatively, we could
675 * sv_upgrade to avoid this.
676 */
677 {
678 /* swap sv_u */
679 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
680
681 /* if SvANY points to the head, we need to adjust the pointers,
682 * as the pointer for a still points to b, and maybe vice versa.
683 */
684 #define svany_in_head(type) \
685 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
686
687 if (svany_in_head (SvTYPE (a)))
688 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
689
690 if (svany_in_head (SvTYPE (b)))
691 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
692 }
693#endif
694}
695
696/* swap sv heads, at least logically */
273static void 697static void
698swap_svs (pTHX_ Coro__State c)
699{
700 int i;
701
702 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
703 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
704}
705
706#define SWAP_SVS(coro) \
707 if (ecb_expect_false ((coro)->swap_sv)) \
708 swap_svs (aTHX_ (coro))
709
710static void
711on_enterleave_call (pTHX_ SV *cb);
712
713static void
274load_state(pTHX_ Coro__State c) 714load_perl (pTHX_ Coro__State c)
275{ 715{
276 PL_dowarn = c->dowarn; 716 perl_slots *slot = c->slot;
277 PL_in_eval = c->in_eval; 717 c->slot = 0;
278 718
279 PL_curstackinfo = c->curstackinfo;
280 PL_curstack = c->curstack;
281 PL_mainstack = c->mainstack; 719 PL_mainstack = c->mainstack;
282 PL_stack_sp = c->stack_sp;
283 PL_op = c->op;
284 PL_curpad = c->curpad;
285 PL_comppad = c->comppad;
286 PL_compcv = c->compcv;
287 PL_stack_base = c->stack_base;
288 PL_stack_max = c->stack_max;
289 PL_tmps_stack = c->tmps_stack;
290 PL_tmps_floor = c->tmps_floor;
291 PL_tmps_ix = c->tmps_ix;
292 PL_tmps_max = c->tmps_max;
293 PL_markstack = c->markstack;
294 PL_markstack_ptr = c->markstack_ptr;
295 PL_markstack_max = c->markstack_max;
296 PL_scopestack = c->scopestack;
297 PL_scopestack_ix = c->scopestack_ix;
298 PL_scopestack_max = c->scopestack_max;
299 PL_savestack = c->savestack;
300 PL_savestack_ix = c->savestack_ix;
301 PL_savestack_max = c->savestack_max;
302#if PERL_VERSION < 9
303 PL_retstack = c->retstack;
304 PL_retstack_ix = c->retstack_ix;
305 PL_retstack_max = c->retstack_max;
306#endif
307 PL_curpm = c->curpm;
308 PL_curcop = c->curcop;
309 720
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 721#if CORO_JIT
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 722 load_perl_slots (slot);
312 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 723#else
724 #define VARx(name,expr,type) expr = slot->name;
725 #include "state.h"
726#endif
313 727
314 { 728 {
315 dSP; 729 dSP;
730
316 CV *cv; 731 CV *cv;
317 732
318 /* now do the ugly restore mess */ 733 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs)) 734 while (ecb_expect_true (cv = (CV *)POPs))
320 { 735 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */ 736 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist; 737 CvDEPTH (cv) = PTR2IV (POPs);
327 } 738 CvPADLIST (cv) = (PADLIST *)POPs;
328
329 ++CvDEPTH(cv);
330 } 739 }
331 740
332 PUTBACK; 741 PUTBACK;
333 } 742 }
334}
335 743
744 slf_frame = c->slf_frame;
745 CORO_THROW = c->except;
746
747 if (ecb_expect_false (enable_times))
748 {
749 if (ecb_expect_false (!times_valid))
750 coro_times_update ();
751
752 coro_times_sub (c);
753 }
754
755 if (ecb_expect_false (c->on_enter))
756 {
757 int i;
758
759 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
760 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
761 }
762
763 SWAP_SVS (c);
764}
765
336static void 766static void
337save_state(pTHX_ Coro__State c, int flags) 767save_perl (pTHX_ Coro__State c)
338{ 768{
769 SWAP_SVS (c);
770
771 if (ecb_expect_false (c->on_leave))
772 {
773 int i;
774
775 for (i = AvFILLp (c->on_leave); i >= 0; --i)
776 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
777 }
778
779 times_valid = 0;
780
781 if (ecb_expect_false (enable_times))
782 {
783 coro_times_update (); times_valid = 1;
784 coro_times_add (c);
785 }
786
787 c->except = CORO_THROW;
788 c->slf_frame = slf_frame;
789
339 { 790 {
340 dSP; 791 dSP;
341 I32 cxix = cxstack_ix; 792 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 793 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo; 794 PERL_SI *top_si = PL_curstackinfo;
… …
345 /* 796 /*
346 * the worst thing you can imagine happens first - we have to save 797 * the worst thing you can imagine happens first - we have to save
347 * (and reinitialize) all cv's in the whole callchain :( 798 * (and reinitialize) all cv's in the whole callchain :(
348 */ 799 */
349 800
350 PUSHs (Nullsv); 801 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 802 /* this loop was inspired by pp_caller */
352 for (;;) 803 for (;;)
353 { 804 {
354 while (cxix >= 0) 805 while (ecb_expect_true (cxix >= 0))
355 { 806 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 807 PERL_CONTEXT *cx = &ccstk[cxix--];
357 808
358 if (CxTYPE(cx) == CXt_SUB) 809 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
359 { 810 {
360 CV *cv = cx->blk_sub.cv; 811 CV *cv = cx->blk_sub.cv;
812
361 if (CvDEPTH(cv)) 813 if (ecb_expect_true (CvDEPTH (cv)))
362 { 814 {
363 EXTEND (SP, CvDEPTH(cv)*2); 815 EXTEND (SP, 3);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv)); 816 PUSHs ((SV *)CvPADLIST (cv));
817 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 818 PUSHs ((SV *)cv);
374 819
820 CvDEPTH (cv) = 0;
375 get_padlist (aTHX_ cv); 821 get_padlist (aTHX_ cv);
376 } 822 }
377 } 823 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 } 824 }
387 825
388 if (top_si->si_type == PERLSI_MAIN) 826 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 827 break;
390 828
391 top_si = top_si->si_prev; 829 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 830 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 831 cxix = top_si->si_cxix;
394 } 832 }
395 833
396 PUTBACK; 834 PUTBACK;
397 } 835 }
398 836
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 837 /* allocate some space on the context stack for our purposes */
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 838 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
401 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 839 {
840 unsigned int i;
402 841
403 c->dowarn = PL_dowarn; 842 for (i = 0; i < SLOT_COUNT; ++i)
404 c->in_eval = PL_in_eval; 843 CXINC;
405 844
406 c->curstackinfo = PL_curstackinfo; 845 cxstack_ix -= SLOT_COUNT; /* undo allocation */
407 c->curstack = PL_curstack; 846 }
847
408 c->mainstack = PL_mainstack; 848 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp; 849
410 c->op = PL_op; 850 {
411 c->curpad = PL_curpad; 851 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412 c->comppad = PL_comppad; 852
413 c->compcv = PL_compcv; 853#if CORO_JIT
414 c->stack_base = PL_stack_base; 854 save_perl_slots (slot);
415 c->stack_max = PL_stack_max; 855#else
416 c->tmps_stack = PL_tmps_stack; 856 #define VARx(name,expr,type) slot->name = expr;
417 c->tmps_floor = PL_tmps_floor; 857 #include "state.h"
418 c->tmps_ix = PL_tmps_ix;
419 c->tmps_max = PL_tmps_max;
420 c->markstack = PL_markstack;
421 c->markstack_ptr = PL_markstack_ptr;
422 c->markstack_max = PL_markstack_max;
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif 858#endif
434 c->curpm = PL_curpm; 859 }
435 c->curcop = PL_curcop;
436} 860}
437 861
438/* 862/*
439 * allocate various perl stacks. This is an exact copy 863 * allocate various perl stacks. This is almost an exact copy
440 * of perl.c:init_stacks, except that it uses less memory 864 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do 865 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace. 866 * not usually need a lot of stackspace.
443 */ 867 */
868#if CORO_PREFER_PERL_FUNCTIONS
869# define coro_init_stacks(thx) init_stacks ()
870#else
444static void 871static void
445coro_init_stacks (pTHX) 872coro_init_stacks (pTHX)
446{ 873{
447 LOCK; 874 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450 PL_curstackinfo->si_type = PERLSI_MAIN; 875 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 876 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 877 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 878
454 PL_stack_base = AvARRAY(PL_curstack); 879 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 880 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 881 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 882
458 New(50,PL_tmps_stack,96,SV*); 883 New(50,PL_tmps_stack,32,SV*);
459 PL_tmps_floor = -1; 884 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 885 PL_tmps_ix = -1;
461 PL_tmps_max = 96; 886 PL_tmps_max = 32;
462 887
463 New(54,PL_markstack,16,I32); 888 New(54,PL_markstack,16,I32);
464 PL_markstack_ptr = PL_markstack; 889 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16; 890 PL_markstack_max = PL_markstack + 16;
466 891
467#ifdef SET_MARK_OFFSET 892#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 893 SET_MARK_OFFSET;
469#endif 894#endif
470 895
471 New(54,PL_scopestack,16,I32); 896 New(54,PL_scopestack,8,I32);
472 PL_scopestack_ix = 0; 897 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16; 898 PL_scopestack_max = 8;
899#if HAS_SCOPESTACK_NAME
900 New(54,PL_scopestack_name,8,const char*);
901#endif
474 902
475 New(54,PL_savestack,96,ANY); 903 New(54,PL_savestack,24,ANY);
476 PL_savestack_ix = 0; 904 PL_savestack_ix = 0;
477 PL_savestack_max = 96; 905 PL_savestack_max = 24;
478 906
479#if PERL_VERSION < 9 907#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 908 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 909 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 910 PL_retstack_max = 4;
483#endif 911#endif
484
485 UNLOCK;
486} 912}
913#endif
487 914
488/* 915/*
489 * destroy the stacks, the callchain etc... 916 * destroy the stacks, the callchain etc...
490 */ 917 */
491static void 918static void
492destroy_stacks(pTHX) 919coro_destruct_stacks (pTHX)
493{ 920{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 LEAVE_SCOPE (0);
498
499 /* sure it is, but more important: is it correct?? :/ */
500 FREETMPS;
501
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503 }
504
505 while (PL_curstackinfo->si_next) 921 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 922 PL_curstackinfo = PL_curstackinfo->si_next;
507 923
508 while (PL_curstackinfo) 924 while (PL_curstackinfo)
509 { 925 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 926 PERL_SI *p = PL_curstackinfo->si_prev;
511 927
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 928 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack); 929 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 930
524 Safefree (PL_curstackinfo->si_cxstack); 931 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo); 932 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 933 PL_curstackinfo = p;
527 } 934 }
528 935
529 Safefree (PL_tmps_stack); 936 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack); 937 Safefree (PL_markstack);
531 Safefree (PL_scopestack); 938 Safefree (PL_scopestack);
939#if HAS_SCOPESTACK_NAME
940 Safefree (PL_scopestack_name);
941#endif
532 Safefree (PL_savestack); 942 Safefree (PL_savestack);
533#if PERL_VERSION < 9 943#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree (PL_retstack); 944 Safefree (PL_retstack);
535#endif 945#endif
536} 946}
537 947
948#define CORO_RSS \
949 rss += sizeof (SYM (curstackinfo)); \
950 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
951 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
952 rss += SYM (tmps_max) * sizeof (SV *); \
953 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
954 rss += SYM (scopestack_max) * sizeof (I32); \
955 rss += SYM (savestack_max) * sizeof (ANY);
956
957static size_t
958coro_rss (pTHX_ struct coro *coro)
959{
960 size_t rss = sizeof (*coro);
961
962 if (coro->mainstack)
963 {
964 if (coro->flags & CF_RUNNING)
965 {
966 #define SYM(sym) PL_ ## sym
967 CORO_RSS;
968 #undef SYM
969 }
970 else
971 {
972 #define SYM(sym) coro->slot->sym
973 CORO_RSS;
974 #undef SYM
975 }
976 }
977
978 return rss;
979}
980
981/** coroutine stack handling ************************************************/
982
983static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
984static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
985static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
986
987/* apparently < 5.8.8 */
988#ifndef MgPV_nolen_const
989#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
990 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
991 (const char*)(mg)->mg_ptr)
992#endif
993
994/*
995 * This overrides the default magic get method of %SIG elements.
996 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
997 * and instead of trying to save and restore the hash elements (extremely slow),
998 * we just provide our own readback here.
999 */
1000static int ecb_cold
1001coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1002{
1003 const char *s = MgPV_nolen_const (mg);
1004
1005 if (*s == '_')
1006 {
1007 SV **svp = 0;
1008
1009 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1010 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1011
1012 if (svp)
1013 {
1014 SV *ssv;
1015
1016 if (!*svp)
1017 ssv = &PL_sv_undef;
1018 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1019 ssv = sv_2mortal (newRV_inc (*svp));
1020 else
1021 ssv = *svp;
1022
1023 sv_setsv (sv, ssv);
1024 return 0;
1025 }
1026 }
1027
1028 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1029}
1030
1031static int ecb_cold
1032coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1033{
1034 const char *s = MgPV_nolen_const (mg);
1035
1036 if (*s == '_')
1037 {
1038 SV **svp = 0;
1039
1040 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1041 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1042
1043 if (svp)
1044 {
1045 SV *old = *svp;
1046 *svp = 0;
1047 SvREFCNT_dec (old);
1048 return 0;
1049 }
1050 }
1051
1052 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1053}
1054
1055static int ecb_cold
1056coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1057{
1058 const char *s = MgPV_nolen_const (mg);
1059
1060 if (*s == '_')
1061 {
1062 SV **svp = 0;
1063
1064 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1065 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1066
1067 if (svp)
1068 {
1069 SV *old = *svp;
1070 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1071 SvREFCNT_dec (old);
1072 return 0;
1073 }
1074 }
1075
1076 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1077}
1078
1079static void
1080prepare_nop (pTHX_ struct coro_transfer_args *ta)
1081{
1082 /* kind of mega-hacky, but works */
1083 ta->next = ta->prev = (struct coro *)ta;
1084}
1085
538static void 1086static int
539setup_coro (struct coro *coro) 1087slf_check_nop (pTHX_ struct CoroSLF *frame)
1088{
1089 return 0;
1090}
1091
1092static int
1093slf_check_repeat (pTHX_ struct CoroSLF *frame)
1094{
1095 return 1;
1096}
1097
1098static UNOP init_perl_op;
1099
1100ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1101init_perl (pTHX_ struct coro *coro)
540{ 1102{
541 /* 1103 /*
542 * emulate part of the perl startup here. 1104 * emulate part of the perl startup here.
543 */ 1105 */
1106 coro_init_stacks (aTHX);
1107
1108 PL_runops = RUNOPS_DEFAULT;
1109 PL_curcop = &PL_compiling;
1110 PL_in_eval = EVAL_NULL;
1111 PL_comppad = 0;
1112 PL_comppad_name = 0;
1113 PL_comppad_name_fill = 0;
1114 PL_comppad_name_floor = 0;
1115 PL_curpm = 0;
1116 PL_curpad = 0;
1117 PL_localizing = 0;
1118 PL_restartop = 0;
1119#if PERL_VERSION_ATLEAST (5,10,0)
1120 PL_parser = 0;
1121#endif
1122 PL_hints = 0;
1123
1124 /* recreate the die/warn hooks */
1125 PL_diehook = SvREFCNT_inc (rv_diehook);
1126 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1127
1128 GvSV (PL_defgv) = newSV (0);
1129 GvAV (PL_defgv) = coro->args; coro->args = 0;
1130 GvSV (PL_errgv) = newSV (0);
1131 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1132 GvHV (PL_hintgv) = 0;
1133 PL_rs = newSVsv (GvSV (irsgv));
1134 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1135
1136 {
1137 dSP;
1138 UNOP myop;
1139
1140 Zero (&myop, 1, UNOP);
1141 myop.op_next = Nullop;
1142 myop.op_type = OP_ENTERSUB;
1143 myop.op_flags = OPf_WANT_VOID;
1144
1145 PUSHMARK (SP);
1146 PUSHs ((SV *)coro->startcv);
1147 PUTBACK;
1148 PL_op = (OP *)&myop;
1149 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1150 }
1151
1152 /* this newly created coroutine might be run on an existing cctx which most
1153 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1154 */
1155 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1156 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1157 slf_frame.destroy = 0;
1158
1159 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1160 init_perl_op.op_next = PL_op;
1161 init_perl_op.op_type = OP_ENTERSUB;
1162 init_perl_op.op_ppaddr = pp_slf;
1163 /* no flags etc. required, as an init function won't be called */
1164
1165 PL_op = (OP *)&init_perl_op;
1166
1167 /* copy throw, in case it was set before init_perl */
1168 CORO_THROW = coro->except;
1169
1170 SWAP_SVS (coro);
1171
1172 if (ecb_expect_false (enable_times))
1173 {
1174 coro_times_update ();
1175 coro_times_sub (coro);
1176 }
1177}
1178
1179static void
1180coro_unwind_stacks (pTHX)
1181{
1182 if (!IN_DESTRUCT)
1183 {
1184 /* restore all saved variables and stuff */
1185 LEAVE_SCOPE (0);
1186 assert (PL_tmps_floor == -1);
1187
1188 /* free all temporaries */
1189 FREETMPS;
1190 assert (PL_tmps_ix == -1);
1191
1192 /* unwind all extra stacks */
1193 POPSTACK_TO (PL_mainstack);
1194
1195 /* unwind main stack */
1196 dounwind (-1);
1197 }
1198}
1199
1200static void
1201destroy_perl (pTHX_ struct coro *coro)
1202{
1203 SV *svf [9];
1204
1205 {
1206 SV *old_current = SvRV (coro_current);
1207 struct coro *current = SvSTATE (old_current);
1208
1209 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1210
1211 save_perl (aTHX_ current);
1212
1213 /* this will cause transfer_check to croak on block*/
1214 SvRV_set (coro_current, (SV *)coro->hv);
1215
1216 load_perl (aTHX_ coro);
1217
1218 coro_unwind_stacks (aTHX);
1219
1220 /* restore swapped sv's */
1221 SWAP_SVS (coro);
1222
1223 coro_destruct_stacks (aTHX);
1224
1225 /* now save some sv's to be free'd later */
1226 svf [0] = GvSV (PL_defgv);
1227 svf [1] = (SV *)GvAV (PL_defgv);
1228 svf [2] = GvSV (PL_errgv);
1229 svf [3] = (SV *)PL_defoutgv;
1230 svf [4] = PL_rs;
1231 svf [5] = GvSV (irsgv);
1232 svf [6] = (SV *)GvHV (PL_hintgv);
1233 svf [7] = PL_diehook;
1234 svf [8] = PL_warnhook;
1235 assert (9 == sizeof (svf) / sizeof (*svf));
1236
1237 SvRV_set (coro_current, old_current);
1238
1239 load_perl (aTHX_ current);
1240 }
1241
1242 {
1243 unsigned int i;
1244
1245 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1246 SvREFCNT_dec (svf [i]);
1247
1248 SvREFCNT_dec (coro->saved_deffh);
1249 SvREFCNT_dec (coro->rouse_cb);
1250 SvREFCNT_dec (coro->invoke_cb);
1251 SvREFCNT_dec (coro->invoke_av);
1252 }
1253}
1254
1255ecb_inline void
1256free_coro_mortal (pTHX)
1257{
1258 if (ecb_expect_true (coro_mortal))
1259 {
1260 SvREFCNT_dec ((SV *)coro_mortal);
1261 coro_mortal = 0;
1262 }
1263}
1264
1265static int
1266runops_trace (pTHX)
1267{
1268 COP *oldcop = 0;
1269 int oldcxix = -2;
1270
1271 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1272 {
1273 PERL_ASYNC_CHECK ();
1274
1275 if (cctx_current->flags & CC_TRACE_ALL)
1276 {
1277 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1278 {
1279 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1280 SV **bot, **top;
1281 AV *av = newAV (); /* return values */
1282 SV **cb;
1283 dSP;
1284
1285 GV *gv = CvGV (cx->blk_sub.cv);
1286 SV *fullname = sv_2mortal (newSV (0));
1287 if (isGV (gv))
1288 gv_efullname3 (fullname, gv, 0);
1289
1290 bot = PL_stack_base + cx->blk_oldsp + 1;
1291 top = cx->blk_gimme == G_ARRAY ? SP + 1
1292 : cx->blk_gimme == G_SCALAR ? bot + 1
1293 : bot;
1294
1295 av_extend (av, top - bot);
1296 while (bot < top)
1297 av_push (av, SvREFCNT_inc_NN (*bot++));
1298
1299 PL_runops = RUNOPS_DEFAULT;
1300 ENTER;
1301 SAVETMPS;
1302 EXTEND (SP, 3);
1303 PUSHMARK (SP);
1304 PUSHs (&PL_sv_no);
1305 PUSHs (fullname);
1306 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1307 PUTBACK;
1308 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1309 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1310 SPAGAIN;
1311 FREETMPS;
1312 LEAVE;
1313 PL_runops = runops_trace;
1314 }
1315
1316 if (oldcop != PL_curcop)
1317 {
1318 oldcop = PL_curcop;
1319
1320 if (PL_curcop != &PL_compiling)
1321 {
1322 SV **cb;
1323
1324 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1325 {
1326 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1327
1328 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1329 {
1330 dSP;
1331 GV *gv = CvGV (cx->blk_sub.cv);
1332 SV *fullname = sv_2mortal (newSV (0));
1333
1334 if (isGV (gv))
1335 gv_efullname3 (fullname, gv, 0);
1336
1337 PL_runops = RUNOPS_DEFAULT;
1338 ENTER;
1339 SAVETMPS;
1340 EXTEND (SP, 3);
1341 PUSHMARK (SP);
1342 PUSHs (&PL_sv_yes);
1343 PUSHs (fullname);
1344 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1345 PUTBACK;
1346 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1347 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1348 SPAGAIN;
1349 FREETMPS;
1350 LEAVE;
1351 PL_runops = runops_trace;
1352 }
1353
1354 oldcxix = cxstack_ix;
1355 }
1356
1357 if (cctx_current->flags & CC_TRACE_LINE)
1358 {
1359 dSP;
1360
1361 PL_runops = RUNOPS_DEFAULT;
1362 ENTER;
1363 SAVETMPS;
1364 EXTEND (SP, 3);
1365 PL_runops = RUNOPS_DEFAULT;
1366 PUSHMARK (SP);
1367 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1368 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1369 PUTBACK;
1370 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1371 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1372 SPAGAIN;
1373 FREETMPS;
1374 LEAVE;
1375 PL_runops = runops_trace;
1376 }
1377 }
1378 }
1379 }
1380 }
1381
1382 TAINT_NOT;
1383 return 0;
1384}
1385
1386static struct CoroSLF cctx_ssl_frame;
1387
1388static void
1389slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1390{
1391 ta->prev = 0;
1392}
1393
1394static int
1395slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1396{
1397 *frame = cctx_ssl_frame;
1398
1399 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1400}
1401
1402/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1403static void ecb_noinline
1404cctx_prepare (pTHX)
1405{
1406 PL_top_env = &PL_start_env;
1407
1408 if (cctx_current->flags & CC_TRACE)
1409 PL_runops = runops_trace;
1410
1411 /* we already must be executing an SLF op, there is no other valid way
1412 * that can lead to creation of a new cctx */
1413 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1414 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1415
1416 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1417 cctx_ssl_frame = slf_frame;
1418
1419 slf_frame.prepare = slf_prepare_set_stacklevel;
1420 slf_frame.check = slf_check_set_stacklevel;
1421}
1422
1423/* the tail of transfer: execute stuff we can only do after a transfer */
1424ecb_inline void
1425transfer_tail (pTHX)
1426{
1427 free_coro_mortal (aTHX);
1428}
1429
1430/* try to exit the same way perl's main function would do */
1431/* we do not bother resetting the environment or other things *7
1432/* that are not, uhm, essential */
1433/* this obviously also doesn't work when perl is embedded */
1434static void ecb_noinline ecb_cold
1435perlish_exit (pTHX)
1436{
1437 int exitstatus = perl_destruct (PL_curinterp);
1438 perl_free (PL_curinterp);
1439 exit (exitstatus);
1440}
1441
1442/*
1443 * this is a _very_ stripped down perl interpreter ;)
1444 */
1445static void
1446cctx_run (void *arg)
1447{
1448#ifdef USE_ITHREADS
1449# if CORO_PTHREAD
1450 PERL_SET_CONTEXT (coro_thx);
1451# endif
1452#endif
1453 {
1454 dTHX;
1455
1456 /* normally we would need to skip the entersub here */
1457 /* not doing so will re-execute it, which is exactly what we want */
1458 /* PL_nop = PL_nop->op_next */
1459
1460 /* inject a fake subroutine call to cctx_init */
1461 cctx_prepare (aTHX);
1462
1463 /* cctx_run is the alternative tail of transfer() */
1464 transfer_tail (aTHX);
1465
1466 /* somebody or something will hit me for both perl_run and PL_restartop */
1467 PL_restartop = PL_op;
1468 perl_run (PL_curinterp);
1469 /*
1470 * Unfortunately, there is no way to get at the return values of the
1471 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1472 * runtime errors here, as this is just a random interpreter, not a thread.
1473 */
1474
1475 /*
1476 * If perl-run returns we assume exit() was being called or the coro
1477 * fell off the end, which seems to be the only valid (non-bug)
1478 * reason for perl_run to return. We try to mimic whatever perl is normally
1479 * doing in that case. YMMV.
1480 */
1481 perlish_exit (aTHX);
1482 }
1483}
1484
1485static coro_cctx *
1486cctx_new (void)
1487{
1488 coro_cctx *cctx;
1489
1490 ++cctx_count;
1491 New (0, cctx, 1, coro_cctx);
1492
1493 cctx->gen = cctx_gen;
1494 cctx->flags = 0;
1495 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1496
1497 return cctx;
1498}
1499
1500/* create a new cctx only suitable as source */
1501static coro_cctx *
1502cctx_new_empty (void)
1503{
1504 coro_cctx *cctx = cctx_new ();
1505
1506 cctx->stack.sptr = 0;
1507 coro_create (&cctx->cctx, 0, 0, 0, 0);
1508
1509 return cctx;
1510}
1511
1512/* create a new cctx suitable as destination/running a perl interpreter */
1513static coro_cctx *
1514cctx_new_run (void)
1515{
1516 coro_cctx *cctx = cctx_new ();
1517
1518 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1519 {
1520 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1521 _exit (EXIT_FAILURE);
1522 }
1523
1524 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1525
1526 return cctx;
1527}
1528
1529static void
1530cctx_destroy (coro_cctx *cctx)
1531{
1532 if (!cctx)
1533 return;
1534
1535 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1536
1537 --cctx_count;
1538 coro_destroy (&cctx->cctx);
1539
1540 coro_stack_free (&cctx->stack);
1541
1542 Safefree (cctx);
1543}
1544
1545/* wether this cctx should be destructed */
1546#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1547
1548static coro_cctx *
1549cctx_get (pTHX)
1550{
1551 while (ecb_expect_true (cctx_first))
1552 {
1553 coro_cctx *cctx = cctx_first;
1554 cctx_first = cctx->next;
1555 --cctx_idle;
1556
1557 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1558 return cctx;
1559
1560 cctx_destroy (cctx);
1561 }
1562
1563 return cctx_new_run ();
1564}
1565
1566static void
1567cctx_put (coro_cctx *cctx)
1568{
1569 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1570
1571 /* free another cctx if overlimit */
1572 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1573 {
1574 coro_cctx *first = cctx_first;
1575 cctx_first = first->next;
1576 --cctx_idle;
1577
1578 cctx_destroy (first);
1579 }
1580
1581 ++cctx_idle;
1582 cctx->next = cctx_first;
1583 cctx_first = cctx;
1584}
1585
1586/** coroutine switching *****************************************************/
1587
1588static void
1589transfer_check (pTHX_ struct coro *prev, struct coro *next)
1590{
1591 /* TODO: throwing up here is considered harmful */
1592
1593 if (ecb_expect_true (prev != next))
1594 {
1595 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1596 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1597
1598 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1599 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1600
1601#if !PERL_VERSION_ATLEAST (5,10,0)
1602 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1603 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1604#endif
1605 }
1606}
1607
1608/* always use the TRANSFER macro */
1609static void ecb_noinline /* noinline so we have a fixed stackframe */
1610transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1611{
1612 dSTACKLEVEL;
1613
1614 /* sometimes transfer is only called to set idle_sp */
1615 if (ecb_expect_false (!prev))
1616 {
1617 cctx_current->idle_sp = STACKLEVEL;
1618 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1619 }
1620 else if (ecb_expect_true (prev != next))
1621 {
1622 coro_cctx *cctx_prev;
1623
1624 if (ecb_expect_false (prev->flags & CF_NEW))
1625 {
1626 /* create a new empty/source context */
1627 prev->flags &= ~CF_NEW;
1628 prev->flags |= CF_RUNNING;
1629 }
1630
1631 prev->flags &= ~CF_RUNNING;
1632 next->flags |= CF_RUNNING;
1633
1634 /* first get rid of the old state */
1635 save_perl (aTHX_ prev);
1636
1637 if (ecb_expect_false (next->flags & CF_NEW))
1638 {
1639 /* need to start coroutine */
1640 next->flags &= ~CF_NEW;
1641 /* setup coroutine call */
1642 init_perl (aTHX_ next);
1643 }
1644 else
1645 load_perl (aTHX_ next);
1646
1647 /* possibly untie and reuse the cctx */
1648 if (ecb_expect_true (
1649 cctx_current->idle_sp == STACKLEVEL
1650 && !(cctx_current->flags & CC_TRACE)
1651 && !force_cctx
1652 ))
1653 {
1654 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1655 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1656
1657 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1658 /* without this the next cctx_get might destroy the running cctx while still in use */
1659 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1660 if (ecb_expect_true (!next->cctx))
1661 next->cctx = cctx_get (aTHX);
1662
1663 cctx_put (cctx_current);
1664 }
1665 else
1666 prev->cctx = cctx_current;
1667
1668 ++next->usecount;
1669
1670 cctx_prev = cctx_current;
1671 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1672
1673 next->cctx = 0;
1674
1675 if (ecb_expect_false (cctx_prev != cctx_current))
1676 {
1677 cctx_prev->top_env = PL_top_env;
1678 PL_top_env = cctx_current->top_env;
1679 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1680 }
1681
1682 transfer_tail (aTHX);
1683 }
1684}
1685
1686#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1687#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1688
1689/** high level stuff ********************************************************/
1690
1691/* this function is actually Coro, not Coro::State, but we call it from here */
1692/* because it is convenient - but it hasn't been declared yet for that reason */
1693static void
1694coro_call_on_destroy (pTHX_ struct coro *coro);
1695
1696static void
1697coro_state_destroy (pTHX_ struct coro *coro)
1698{
1699 if (coro->flags & CF_ZOMBIE)
1700 return;
1701
1702 slf_destroy (aTHX_ coro);
1703
1704 coro->flags |= CF_ZOMBIE;
1705
1706 if (coro->flags & CF_READY)
1707 {
1708 /* reduce nready, as destroying a ready coro effectively unreadies it */
1709 /* alternative: look through all ready queues and remove the coro */
1710 --coro_nready;
1711 }
1712 else
1713 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1714
1715 if (coro->next) coro->next->prev = coro->prev;
1716 if (coro->prev) coro->prev->next = coro->next;
1717 if (coro == coro_first) coro_first = coro->next;
1718
1719 if (coro->mainstack
1720 && coro->mainstack != main_mainstack
1721 && coro->slot
1722 && !PL_dirty)
1723 destroy_perl (aTHX_ coro);
1724
1725 cctx_destroy (coro->cctx);
1726 SvREFCNT_dec (coro->startcv);
1727 SvREFCNT_dec (coro->args);
1728 SvREFCNT_dec (coro->swap_sv);
1729 SvREFCNT_dec (CORO_THROW);
1730
1731 coro_call_on_destroy (aTHX_ coro);
1732
1733 /* more destruction mayhem in coro_state_free */
1734}
1735
1736static int
1737coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1738{
1739 struct coro *coro = (struct coro *)mg->mg_ptr;
1740 mg->mg_ptr = 0;
1741
1742 coro_state_destroy (aTHX_ coro);
1743 SvREFCNT_dec (coro->on_destroy);
1744 SvREFCNT_dec (coro->status);
1745
1746 Safefree (coro);
1747
1748 return 0;
1749}
1750
1751static int ecb_cold
1752coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1753{
1754 /* called when perl clones the current process the slow way (windows process emulation) */
1755 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1756 mg->mg_ptr = 0;
1757 mg->mg_virtual = 0;
1758
1759 return 0;
1760}
1761
1762static MGVTBL coro_state_vtbl = {
1763 0, 0, 0, 0,
1764 coro_state_free,
1765 0,
1766#ifdef MGf_DUP
1767 coro_state_dup,
1768#else
1769# define MGf_DUP 0
1770#endif
1771};
1772
1773static void
1774prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1775{
1776 ta->prev = SvSTATE (prev_sv);
1777 ta->next = SvSTATE (next_sv);
1778 TRANSFER_CHECK (*ta);
1779}
1780
1781static void
1782api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1783{
1784 struct coro_transfer_args ta;
1785
1786 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1787 TRANSFER (ta, 1);
1788}
1789
1790/** Coro ********************************************************************/
1791
1792ecb_inline void
1793coro_enq (pTHX_ struct coro *coro)
1794{
1795 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1796
1797 SvREFCNT_inc_NN (coro->hv);
1798
1799 coro->next_ready = 0;
1800 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1801 ready [1] = coro;
1802}
1803
1804ecb_inline struct coro *
1805coro_deq (pTHX)
1806{
1807 int prio;
1808
1809 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1810 {
1811 struct coro **ready = coro_ready [prio];
1812
1813 if (ready [0])
1814 {
1815 struct coro *coro = ready [0];
1816 ready [0] = coro->next_ready;
1817 return coro;
1818 }
1819 }
1820
1821 return 0;
1822}
1823
1824static void
1825invoke_sv_ready_hook_helper (void)
1826{
544 dTHX; 1827 dTHX;
545 dSP; 1828 dSP;
546 UNOP myop;
547 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
548 1829
549 coro_init_stacks (aTHX); 1830 ENTER;
550 /*PL_curcop = 0;*/ 1831 SAVETMPS;
551 /*PL_in_eval = PL_in_eval;*/ /* inherit */
552 SvREFCNT_dec (GvAV (PL_defgv));
553 GvAV (PL_defgv) = coro->args; coro->args = 0;
554 1832
555 SPAGAIN;
556
557 Zero (&myop, 1, UNOP);
558 myop.op_next = Nullop;
559 myop.op_flags = OPf_WANT_VOID;
560
561 PL_op = (OP *)&myop;
562
563 PUSHMARK(SP); 1833 PUSHMARK (SP);
564 XPUSHs (sub_init);
565 PUTBACK; 1834 PUTBACK;
566 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1835 call_sv (coro_readyhook, G_VOID | G_DISCARD);
567 SPAGAIN;
568 1836
569 ENTER; /* necessary e.g. for dounwind */ 1837 FREETMPS;
1838 LEAVE;
570} 1839}
571 1840
572static void 1841static int
573free_coro_mortal () 1842api_ready (pTHX_ SV *coro_sv)
574{ 1843{
575 if (coro_mortal) 1844 struct coro *coro = SvSTATE (coro_sv);
576 {
577 SvREFCNT_dec (coro_mortal);
578 coro_mortal = 0;
579 }
580}
581 1845
582static void 1846 if (coro->flags & CF_READY)
583coro_run (void *arg)
584{
585 /*
586 * this is a _very_ stripped down perl interpreter ;)
587 */
588 dTHX;
589 PL_top_env = &PL_start_env;
590
591 UNLOCK;
592
593 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597 /* somebody will hit me for both perl_run and PL_restart_op */
598 perl_run (aTHX_ PERL_GET_CONTEXT);
599
600 abort ();
601}
602
603static coro_stack *
604stack_new ()
605{
606 coro_stack *stack;
607
608 New (0, stack, 1, coro_stack);
609
610#if HAVE_MMAP
611
612 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
613 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614
615 if (stack->sptr == (void *)-1)
616 {
617 perror ("FATAL: unable to mmap stack for coroutine");
618 _exit (EXIT_FAILURE);
619 }
620
621 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
622
623#else
624
625 stack->ssize = STACKSIZE * (long)sizeof (long);
626 New (0, stack->sptr, STACKSIZE, long);
627
628 if (!stack->sptr)
629 {
630 perror (stderr, "FATAL: unable to malloc stack for coroutine");
631 _exit (EXIT_FAILURE);
632 }
633
634#endif
635
636 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
637
638 return stack;
639}
640
641static void
642stack_free (coro_stack *stack)
643{
644 if (!stack || stack == main_stack)
645 return; 1847 return 0;
646 1848
647#if HAVE_MMAP 1849 coro->flags |= CF_READY;
648 munmap (stack->sptr, stack->ssize);
649#else
650 Safefree (stack->sptr);
651#endif
652 1850
653 Safefree (stack); 1851 coro_enq (aTHX_ coro);
654}
655 1852
656static coro_stack *stack_first; 1853 if (!coro_nready++)
1854 if (coroapi.readyhook)
1855 coroapi.readyhook ();
657 1856
658static coro_stack * 1857 return 1;
659stack_get () 1858}
660{
661 coro_stack *stack;
662 1859
663 if (stack_first) 1860static int
664 { 1861api_is_ready (pTHX_ SV *coro_sv)
665 stack = stack_first; 1862{
666 stack_first = stack->next; 1863 return !!(SvSTATE (coro_sv)->flags & CF_READY);
667 } 1864}
668 else 1865
1866/* expects to own a reference to next->hv */
1867ecb_inline void
1868prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1869{
1870 SV *prev_sv = SvRV (coro_current);
1871
1872 ta->prev = SvSTATE_hv (prev_sv);
1873 ta->next = next;
1874
1875 TRANSFER_CHECK (*ta);
1876
1877 SvRV_set (coro_current, (SV *)next->hv);
1878
1879 free_coro_mortal (aTHX);
1880 coro_mortal = prev_sv;
1881}
1882
1883static void
1884prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1885{
1886 for (;;)
669 { 1887 {
670 stack = stack_new (); 1888 struct coro *next = coro_deq (aTHX);
671 PL_op = PL_op->op_next;
672 }
673 1889
674 return stack; 1890 if (ecb_expect_true (next))
675}
676
677static void
678stack_put (coro_stack *stack)
679{
680 stack->next = stack_first;
681 stack_first = stack;
682}
683
684/* never call directly, always through the coro_state_transfer global variable */
685static void
686transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
687{
688 dSTACKLEVEL;
689
690 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL)
692 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
693 else if (prev != next)
694 {
695 coro_stack *prev__stack;
696
697 LOCK;
698
699 if (next->mainstack)
700 { 1891 {
701 /* coroutine already started */ 1892 /* cannot transfer to destroyed coros, skip and look for next */
702 SAVE (prev, flags); 1893 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
703 LOAD (next); 1894 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1895 else
1896 {
1897 next->flags &= ~CF_READY;
1898 --coro_nready;
1899
1900 prepare_schedule_to (aTHX_ ta, next);
1901 break;
1902 }
704 } 1903 }
705 else 1904 else
706 { 1905 {
707 /* need to start coroutine */ 1906 /* nothing to schedule: call the idle handler */
708 /* first get rid of the old state */ 1907 if (SvROK (sv_idle)
709 SAVE (prev, -1); 1908 && SvOBJECT (SvRV (sv_idle)))
710 /* setup coroutine call */ 1909 {
711 setup_coro (next); 1910 if (SvRV (sv_idle) == SvRV (coro_current))
712 /* need a stack */ 1911 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
713 next->stack = 0; 1912
1913 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1914 api_ready (aTHX_ SvRV (sv_idle));
1915 --coro_nready;
1916 }
1917 else
1918 {
1919 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1920 dSP;
1921
1922 ENTER;
1923 SAVETMPS;
1924
1925 PUSHMARK (SP);
1926 PUTBACK;
1927 call_sv (sv_idle, G_VOID | G_DISCARD);
1928
1929 FREETMPS;
1930 LEAVE;
1931 }
714 } 1932 }
1933 }
1934}
715 1935
716 prev__stack = prev->stack; 1936ecb_inline void
1937prepare_cede (pTHX_ struct coro_transfer_args *ta)
1938{
1939 api_ready (aTHX_ coro_current);
1940 prepare_schedule (aTHX_ ta);
1941}
717 1942
718 /* possibly "free" the stack */ 1943ecb_inline void
719 if (prev__stack->idle_sp == STACKLEVEL) 1944prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1945{
1946 SV *prev = SvRV (coro_current);
1947
1948 if (coro_nready)
1949 {
1950 prepare_schedule (aTHX_ ta);
1951 api_ready (aTHX_ prev);
1952 }
1953 else
1954 prepare_nop (aTHX_ ta);
1955}
1956
1957static void
1958api_schedule (pTHX)
1959{
1960 struct coro_transfer_args ta;
1961
1962 prepare_schedule (aTHX_ &ta);
1963 TRANSFER (ta, 1);
1964}
1965
1966static void
1967api_schedule_to (pTHX_ SV *coro_sv)
1968{
1969 struct coro_transfer_args ta;
1970 struct coro *next = SvSTATE (coro_sv);
1971
1972 SvREFCNT_inc_NN (coro_sv);
1973 prepare_schedule_to (aTHX_ &ta, next);
1974}
1975
1976static int
1977api_cede (pTHX)
1978{
1979 struct coro_transfer_args ta;
1980
1981 prepare_cede (aTHX_ &ta);
1982
1983 if (ecb_expect_true (ta.prev != ta.next))
1984 {
1985 TRANSFER (ta, 1);
1986 return 1;
1987 }
1988 else
1989 return 0;
1990}
1991
1992static int
1993api_cede_notself (pTHX)
1994{
1995 if (coro_nready)
1996 {
1997 struct coro_transfer_args ta;
1998
1999 prepare_cede_notself (aTHX_ &ta);
2000 TRANSFER (ta, 1);
2001 return 1;
2002 }
2003 else
2004 return 0;
2005}
2006
2007static void
2008api_trace (pTHX_ SV *coro_sv, int flags)
2009{
2010 struct coro *coro = SvSTATE (coro_sv);
2011
2012 if (coro->flags & CF_RUNNING)
2013 croak ("cannot enable tracing on a running coroutine, caught");
2014
2015 if (flags & CC_TRACE)
2016 {
2017 if (!coro->cctx)
2018 coro->cctx = cctx_new_run ();
2019 else if (!(coro->cctx->flags & CC_TRACE))
2020 croak ("cannot enable tracing on coroutine with custom stack, caught");
2021
2022 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2023 }
2024 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2025 {
2026 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2027
2028 if (coro->flags & CF_RUNNING)
2029 PL_runops = RUNOPS_DEFAULT;
2030 else
2031 coro->slot->runops = RUNOPS_DEFAULT;
2032 }
2033}
2034
2035static void
2036coro_push_av (pTHX_ AV *av, I32 gimme_v)
2037{
2038 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2039 {
2040 dSP;
2041
2042 if (gimme_v == G_SCALAR)
2043 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2044 else
720 { 2045 {
721 stack_put (prev__stack); 2046 int i;
722 prev->stack = 0; 2047 EXTEND (SP, AvFILLp (av) + 1);
2048
2049 for (i = 0; i <= AvFILLp (av); ++i)
2050 PUSHs (AvARRAY (av)[i]);
723 } 2051 }
724 2052
725 if (!next->stack) 2053 PUTBACK;
726 next->stack = stack_get (); 2054 }
2055}
727 2056
728 if (prev__stack != next->stack) 2057static void
2058coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2059{
2060 if (!coro->on_destroy)
2061 coro->on_destroy = newAV ();
2062
2063 av_push (coro->on_destroy, cb);
2064}
2065
2066static void
2067slf_destroy_join (pTHX_ struct CoroSLF *frame)
2068{
2069 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2070}
2071
2072static int
2073slf_check_join (pTHX_ struct CoroSLF *frame)
2074{
2075 struct coro *coro = (struct coro *)frame->data;
2076
2077 if (!coro->status)
2078 return 1;
2079
2080 frame->destroy = 0;
2081
2082 coro_push_av (aTHX_ coro->status, GIMME_V);
2083
2084 SvREFCNT_dec ((SV *)coro->hv);
2085
2086 return 0;
2087}
2088
2089static void
2090slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2091{
2092 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2093
2094 if (items > 1)
2095 croak ("join called with too many arguments");
2096
2097 if (coro->status)
2098 frame->prepare = prepare_nop;
2099 else
2100 {
2101 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2102 frame->prepare = prepare_schedule;
2103 }
2104
2105 frame->check = slf_check_join;
2106 frame->destroy = slf_destroy_join;
2107 frame->data = (void *)coro;
2108 SvREFCNT_inc (coro->hv);
2109}
2110
2111static void
2112coro_call_on_destroy (pTHX_ struct coro *coro)
2113{
2114 AV *od = coro->on_destroy;
2115
2116 if (!od)
2117 return;
2118
2119 coro->on_destroy = 0;
2120 sv_2mortal ((SV *)od);
2121
2122 while (AvFILLp (od) >= 0)
2123 {
2124 SV *cb = sv_2mortal (av_pop (od));
2125
2126 /* coro hv's (and only hv's at the moment) are supported as well */
2127 if (SvSTATEhv_p (aTHX_ cb))
2128 api_ready (aTHX_ cb);
2129 else
729 { 2130 {
730 prev__stack->top_env = PL_top_env; 2131 dSP; /* don't disturb outer sp */
731 PL_top_env = next->stack->top_env; 2132 PUSHMARK (SP);
732 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2133
2134 if (coro->status)
2135 {
2136 PUTBACK;
2137 coro_push_av (aTHX_ coro->status, G_ARRAY);
2138 SPAGAIN;
2139 }
2140
2141 PUTBACK;
2142 call_sv (cb, G_VOID | G_DISCARD);
733 } 2143 }
734
735 free_coro_mortal ();
736
737 UNLOCK;
738 }
739}
740
741/* use this function pointer to call the above function */
742/* this is done to increase chances of the compiler not inlining the call */
743/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
745
746struct transfer_args
747{
748 struct coro *prev, *next;
749 int flags;
750};
751
752#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
753
754static void
755coro_state_destroy (struct coro *coro)
756{
757 if (coro->refcnt--)
758 return;
759
760 if (coro->mainstack && coro->mainstack != main_mainstack)
761 { 2144 }
762 struct coro temp; 2145}
763 2146
764 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 2147static void
765 LOAD (aTHX_ coro); 2148coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
766 2149{
767 destroy_stacks (aTHX); 2150 AV *av;
768 2151
769 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2152 if (coro->status)
770
771 coro->mainstack = 0;
772 } 2153 {
2154 av = coro->status;
2155 av_clear (av);
2156 }
2157 else
2158 av = coro->status = newAV ();
773 2159
774 stack_free (coro->stack); 2160 /* items are actually not so common, so optimise for this case */
775 SvREFCNT_dec (coro->args); 2161 if (items)
776 Safefree (coro); 2162 {
2163 int i;
2164
2165 av_extend (av, items - 1);
2166
2167 for (i = 0; i < items; ++i)
2168 av_push (av, SvREFCNT_inc_NN (arg [i]));
2169 }
2170}
2171
2172static void
2173slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2174{
2175 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2176 api_ready (aTHX_ sv_manager);
2177
2178 frame->prepare = prepare_schedule;
2179 frame->check = slf_check_repeat;
2180
2181 /* as a minor optimisation, we could unwind all stacks here */
2182 /* but that puts extra pressure on pp_slf, and is not worth much */
2183 /*coro_unwind_stacks (aTHX);*/
2184}
2185
2186static void
2187slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2188{
2189 HV *coro_hv = (HV *)SvRV (coro_current);
2190
2191 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2192 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2193}
2194
2195static void
2196slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 HV *coro_hv;
2199 struct coro *coro;
2200
2201 if (items <= 0)
2202 croak ("Coro::cancel called without coro object,");
2203
2204 coro = SvSTATE (arg [0]);
2205 coro_hv = coro->hv;
2206
2207 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2208
2209 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2210 {
2211 /* coro currently busy cancelling something, so just notify it */
2212 coro->slf_frame.data = (void *)coro;
2213
2214 frame->prepare = prepare_nop;
2215 frame->check = slf_check_nop;
2216 }
2217 else if (coro_hv == (HV *)SvRV (coro_current))
2218 {
2219 /* cancelling the current coro is allowed, and equals terminate */
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221 }
2222 else
2223 {
2224 struct coro *self = SvSTATE_current;
2225
2226 /* otherwise we cancel directly, purely for speed reasons
2227 * unfortunately, this requires some magic trickery, as
2228 * somebody else could cancel us, so we have to fight the cancellation.
2229 * this is ugly, and hopefully fully worth the extra speed.
2230 * besides, I can't get the slow-but-safe version working...
2231 */
2232 slf_frame.data = 0;
2233 self->flags |= CF_NOCANCEL;
2234 coro_state_destroy (aTHX_ coro);
2235 self->flags &= ~CF_NOCANCEL;
2236
2237 if (slf_frame.data)
2238 {
2239 /* while we were busy we have been cancelled, so terminate */
2240 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2241 }
2242 else
2243 {
2244 frame->prepare = prepare_nop;
2245 frame->check = slf_check_nop;
2246 }
2247 }
777} 2248}
778 2249
779static int 2250static int
780coro_state_clear (SV *sv, MAGIC *mg) 2251slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
781{ 2252{
782 struct coro *coro = (struct coro *)mg->mg_ptr; 2253 frame->prepare = 0;
783 mg->mg_ptr = 0; 2254 coro_unwind_stacks (aTHX);
784 2255
785 coro_state_destroy (coro); 2256 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
786 2257
787 return 0; 2258 return 1;
788} 2259}
789 2260
790static int 2261static int
791coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 2262safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
792{ 2263{
793 struct coro *coro = (struct coro *)mg->mg_ptr; 2264 if (coro->cctx)
2265 croak ("coro inside C callback, unable to cancel at this time, caught");
794 2266
795 ++coro->refcnt; 2267 if (coro->flags & CF_NEW)
2268 {
2269 coro_set_status (aTHX_ coro, arg, items);
2270 coro_state_destroy (aTHX_ coro);
2271 }
2272 else
2273 {
2274 if (!coro->slf_frame.prepare)
2275 croak ("coro outside an SLF function, unable to cancel at this time, caught");
796 2276
2277 slf_destroy (aTHX_ coro);
2278
2279 coro_set_status (aTHX_ coro, arg, items);
2280 coro->slf_frame.prepare = prepare_nop;
2281 coro->slf_frame.check = slf_check_safe_cancel;
2282
2283 api_ready (aTHX_ (SV *)coro->hv);
2284 }
2285
797 return 0; 2286 return 1;
798} 2287}
799 2288
800static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
801
802static struct coro *
803SvSTATE (SV *coro)
804{
805 HV *stash;
806 MAGIC *mg;
807
808 if (SvROK (coro))
809 coro = SvRV (coro);
810
811 stash = SvSTASH (coro);
812 if (stash != coro_stash && stash != coro_state_stash)
813 {
814 /* very slow, but rare, check */
815 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
816 croak ("Coro::State object required");
817 }
818
819 mg = SvMAGIC (coro);
820 assert (mg->mg_type == PERL_MAGIC_ext);
821 return (struct coro *)mg->mg_ptr;
822}
823
824static void
825prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
826{
827 ta->prev = SvSTATE (prev);
828 ta->next = SvSTATE (next);
829 ta->flags = flags;
830}
831
832static void
833api_transfer (SV *prev, SV *next, int flags)
834{
835 dTHX;
836 struct transfer_args ta;
837
838 prepare_transfer (aTHX_ &ta, prev, next, flags);
839 TRANSFER (ta);
840}
841
842/** Coro ********************************************************************/ 2289/*****************************************************************************/
2290/* async pool handler */
843 2291
844#define PRIO_MAX 3
845#define PRIO_HIGH 1
846#define PRIO_NORMAL 0
847#define PRIO_LOW -1
848#define PRIO_IDLE -3
849#define PRIO_MIN -4
850
851/* for Coro.pm */
852static GV *coro_current, *coro_idle;
853static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854static int coro_nready;
855
856static void 2292static int
857coro_enq (pTHX_ SV *sv) 2293slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
858{ 2294{
859 int prio; 2295 HV *hv = (HV *)SvRV (coro_current);
2296 struct coro *coro = (struct coro *)frame->data;
860 2297
861 if (SvTYPE (sv) != SVt_PVHV) 2298 if (!coro->invoke_cb)
862 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2299 return 1; /* loop till we have invoke */
863 2300 else
864 prio = SvSTATE (sv)->prio;
865
866 av_push (coro_ready [prio - PRIO_MIN], sv);
867 coro_nready++;
868}
869
870static SV *
871coro_deq (pTHX_ int min_prio)
872{
873 int prio = PRIO_MAX - PRIO_MIN;
874
875 min_prio -= PRIO_MIN;
876 if (min_prio < 0)
877 min_prio = 0;
878
879 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
880 if (AvFILLp (coro_ready [prio]) >= 0)
881 { 2301 {
882 coro_nready--; 2302 hv_store (hv, "desc", sizeof ("desc") - 1,
883 return av_shift (coro_ready [prio]); 2303 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
884 }
885 2304
886 return 0; 2305 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
887}
888
889static void
890api_ready (SV *coro)
891{
892 dTHX;
893
894 if (SvROK (coro))
895 coro = SvRV (coro);
896
897 LOCK;
898 coro_enq (aTHX_ SvREFCNT_inc (coro));
899 UNLOCK;
900}
901
902static void
903prepare_schedule (aTHX_ struct transfer_args *ta)
904{
905 SV *current, *prev, *next;
906
907 LOCK;
908
909 current = GvSV (coro_current);
910
911 for (;;)
912 {
913 LOCK;
914
915 next = coro_deq (aTHX_ PRIO_MIN);
916
917 if (next)
918 break;
919
920 UNLOCK;
921 2306
922 { 2307 {
923 dSP; 2308 dSP;
924 2309 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
925 ENTER;
926 SAVETMPS;
927
928 PUSHMARK (SP);
929 PUTBACK; 2310 PUTBACK;
930 call_sv (GvSV (coro_idle), G_DISCARD);
931
932 FREETMPS;
933 LEAVE;
934 } 2311 }
2312
2313 SvREFCNT_dec (GvAV (PL_defgv));
2314 GvAV (PL_defgv) = coro->invoke_av;
2315 coro->invoke_av = 0;
2316
2317 return 0;
2318 }
2319}
2320
2321static void
2322slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv ((SV *)hv);
2326
2327 if (ecb_expect_true (coro->saved_deffh))
935 } 2328 {
2329 /* subsequent iteration */
2330 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2331 coro->saved_deffh = 0;
936 2332
937 prev = SvRV (current); 2333 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
938 SvRV (current) = next; 2334 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2335 {
2336 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2337 return;
2338 }
2339 else
2340 {
2341 av_clear (GvAV (PL_defgv));
2342 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
939 2343
940 /* free this only after the transfer */ 2344 coro->prio = 0;
941 free_coro_mortal ();
942 coro_mortal = prev;
943 2345
944 ta->prev = SvSTATE (prev); 2346 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
945 ta->next = SvSTATE (next); 2347 api_trace (aTHX_ coro_current, 0);
946 ta->flags = TRANSFER_SAVE_ALL;
947 2348
948 UNLOCK; 2349 frame->prepare = prepare_schedule;
949} 2350 av_push (av_async_pool, SvREFCNT_inc (hv));
2351 }
2352 }
2353 else
2354 {
2355 /* first iteration, simply fall through */
2356 frame->prepare = prepare_nop;
2357 }
950 2358
2359 frame->check = slf_check_pool_handler;
2360 frame->data = (void *)coro;
2361}
2362
2363/*****************************************************************************/
2364/* rouse callback */
2365
2366#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2367
2368static void
2369coro_rouse_callback (pTHX_ CV *cv)
2370{
2371 dXSARGS;
2372 SV *data = (SV *)S_GENSUB_ARG;
2373
2374 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2375 {
2376 /* first call, set args */
2377 SV *coro = SvRV (data);
2378 AV *av = newAV ();
2379
2380 SvRV_set (data, (SV *)av);
2381
2382 /* better take a full copy of the arguments */
2383 while (items--)
2384 av_store (av, items, newSVsv (ST (items)));
2385
2386 api_ready (aTHX_ coro);
2387 SvREFCNT_dec (coro);
2388 }
2389
2390 XSRETURN_EMPTY;
2391}
2392
951static void 2393static int
2394slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2395{
2396 SV *data = (SV *)frame->data;
2397
2398 if (CORO_THROW)
2399 return 0;
2400
2401 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2402 return 1;
2403
2404 /* now push all results on the stack */
2405 {
2406 dSP;
2407 AV *av = (AV *)SvRV (data);
2408 int i;
2409
2410 EXTEND (SP, AvFILLp (av) + 1);
2411 for (i = 0; i <= AvFILLp (av); ++i)
2412 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2413
2414 /* we have stolen the elements, so set length to zero and free */
2415 AvFILLp (av) = -1;
2416 av_undef (av);
2417
2418 PUTBACK;
2419 }
2420
2421 return 0;
2422}
2423
2424static void
2425slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2426{
2427 SV *cb;
2428
2429 if (items)
2430 cb = arg [0];
2431 else
2432 {
2433 struct coro *coro = SvSTATE_current;
2434
2435 if (!coro->rouse_cb)
2436 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2437
2438 cb = sv_2mortal (coro->rouse_cb);
2439 coro->rouse_cb = 0;
2440 }
2441
2442 if (!SvROK (cb)
2443 || SvTYPE (SvRV (cb)) != SVt_PVCV
2444 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2445 croak ("Coro::rouse_wait called with illegal callback argument,");
2446
2447 {
2448 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2449 SV *data = (SV *)S_GENSUB_ARG;
2450
2451 frame->data = (void *)data;
2452 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2453 frame->check = slf_check_rouse_wait;
2454 }
2455}
2456
2457static SV *
2458coro_new_rouse_cb (pTHX)
2459{
2460 HV *hv = (HV *)SvRV (coro_current);
2461 struct coro *coro = SvSTATE_hv (hv);
2462 SV *data = newRV_inc ((SV *)hv);
2463 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2464
2465 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2466 SvREFCNT_dec (data); /* magicext increases the refcount */
2467
2468 SvREFCNT_dec (coro->rouse_cb);
2469 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2470
2471 return cb;
2472}
2473
2474/*****************************************************************************/
2475/* schedule-like-function opcode (SLF) */
2476
2477static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2478static const CV *slf_cv;
2479static SV **slf_argv;
2480static int slf_argc, slf_arga; /* count, allocated */
2481static I32 slf_ax; /* top of stack, for restore */
2482
2483/* this restores the stack in the case we patched the entersub, to */
2484/* recreate the stack frame as perl will on following calls */
2485/* since entersub cleared the stack */
2486static OP *
2487pp_restore (pTHX)
2488{
2489 int i;
2490 SV **SP = PL_stack_base + slf_ax;
2491
2492 PUSHMARK (SP);
2493
2494 EXTEND (SP, slf_argc + 1);
2495
2496 for (i = 0; i < slf_argc; ++i)
2497 PUSHs (sv_2mortal (slf_argv [i]));
2498
2499 PUSHs ((SV *)CvGV (slf_cv));
2500
2501 RETURNOP (slf_restore.op_first);
2502}
2503
2504static void
2505slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2506{
2507 SV **arg = (SV **)slf_frame.data;
2508
2509 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2510}
2511
2512static void
2513slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2514{
2515 if (items != 2)
2516 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2517
2518 frame->prepare = slf_prepare_transfer;
2519 frame->check = slf_check_nop;
2520 frame->data = (void *)arg; /* let's hope it will stay valid */
2521}
2522
2523static void
2524slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 frame->prepare = prepare_schedule;
2527 frame->check = slf_check_nop;
2528}
2529
2530static void
952prepare_cede (aTHX_ struct transfer_args *ta) 2531slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
953{ 2532{
954 LOCK; 2533 struct coro *next = (struct coro *)slf_frame.data;
955 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956 UNLOCK;
957 2534
2535 SvREFCNT_inc_NN (next->hv);
958 prepare_schedule (ta); 2536 prepare_schedule_to (aTHX_ ta, next);
959} 2537}
960 2538
961static void 2539static void
962api_schedule (void) 2540slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
963{ 2541{
964 dTHX; 2542 if (!items)
2543 croak ("Coro::schedule_to expects a coroutine argument, caught");
2544
2545 frame->data = (void *)SvSTATE (arg [0]);
2546 frame->prepare = slf_prepare_schedule_to;
2547 frame->check = slf_check_nop;
2548}
2549
2550static void
2551slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 api_ready (aTHX_ SvRV (coro_current));
2554
2555 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2556}
2557
2558static void
2559slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2560{
2561 frame->prepare = prepare_cede;
2562 frame->check = slf_check_nop;
2563}
2564
2565static void
2566slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2567{
2568 frame->prepare = prepare_cede_notself;
2569 frame->check = slf_check_nop;
2570}
2571
2572/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2573static void
2574slf_destroy (pTHX_ struct coro *coro)
2575{
2576 /* this callback is reserved for slf functions needing to do cleanup */
2577 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2578 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2579
2580 /*
2581 * The on_destroy above most likely is from an SLF call.
2582 * Since by definition the SLF call will not finish when we destroy
2583 * the coro, we will have to force-finish it here, otherwise
2584 * cleanup functions cannot call SLF functions.
2585 */
2586 coro->slf_frame.prepare = 0;
2587}
2588
2589/*
2590 * these not obviously related functions are all rolled into one
2591 * function to increase chances that they all will call transfer with the same
2592 * stack offset
2593 * SLF stands for "schedule-like-function".
2594 */
2595static OP *
2596pp_slf (pTHX)
2597{
2598 I32 checkmark; /* mark SP to see how many elements check has pushed */
2599
2600 /* set up the slf frame, unless it has already been set-up */
2601 /* the latter happens when a new coro has been started */
2602 /* or when a new cctx was attached to an existing coroutine */
2603 if (ecb_expect_true (!slf_frame.prepare))
2604 {
2605 /* first iteration */
2606 dSP;
2607 SV **arg = PL_stack_base + TOPMARK + 1;
2608 int items = SP - arg; /* args without function object */
2609 SV *gv = *sp;
2610
2611 /* do a quick consistency check on the "function" object, and if it isn't */
2612 /* for us, divert to the real entersub */
2613 if (SvTYPE (gv) != SVt_PVGV
2614 || !GvCV (gv)
2615 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2616 return PL_ppaddr[OP_ENTERSUB](aTHX);
2617
2618 if (!(PL_op->op_flags & OPf_STACKED))
2619 {
2620 /* ampersand-form of call, use @_ instead of stack */
2621 AV *av = GvAV (PL_defgv);
2622 arg = AvARRAY (av);
2623 items = AvFILLp (av) + 1;
2624 }
2625
2626 /* now call the init function, which needs to set up slf_frame */
2627 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2628 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2629
2630 /* pop args */
2631 SP = PL_stack_base + POPMARK;
2632
2633 PUTBACK;
2634 }
2635
2636 /* now that we have a slf_frame, interpret it! */
2637 /* we use a callback system not to make the code needlessly */
2638 /* complicated, but so we can run multiple perl coros from one cctx */
2639
2640 do
2641 {
965 struct transfer_args ta; 2642 struct coro_transfer_args ta;
966 2643
967 prepare_schedule (&ta); 2644 slf_frame.prepare (aTHX_ &ta);
968 TRANSFER (ta); 2645 TRANSFER (ta, 0);
969}
970 2646
2647 checkmark = PL_stack_sp - PL_stack_base;
2648 }
2649 while (slf_frame.check (aTHX_ &slf_frame));
2650
2651 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2652
2653 /* exception handling */
2654 if (ecb_expect_false (CORO_THROW))
2655 {
2656 SV *exception = sv_2mortal (CORO_THROW);
2657
2658 CORO_THROW = 0;
2659 sv_setsv (ERRSV, exception);
2660 croak (0);
2661 }
2662
2663 /* return value handling - mostly like entersub */
2664 /* make sure we put something on the stack in scalar context */
2665 if (GIMME_V == G_SCALAR
2666 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2667 {
2668 dSP;
2669 SV **bot = PL_stack_base + checkmark;
2670
2671 if (sp == bot) /* too few, push undef */
2672 bot [1] = &PL_sv_undef;
2673 else /* too many, take last one */
2674 bot [1] = *sp;
2675
2676 SP = bot + 1;
2677
2678 PUTBACK;
2679 }
2680
2681 return NORMAL;
2682}
2683
2684static void
2685api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2686{
2687 int i;
2688 SV **arg = PL_stack_base + ax;
2689 int items = PL_stack_sp - arg + 1;
2690
2691 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2692
2693 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2694 && PL_op->op_ppaddr != pp_slf)
2695 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2696
2697 CvFLAGS (cv) |= CVf_SLF;
2698 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2699 slf_cv = cv;
2700
2701 /* we patch the op, and then re-run the whole call */
2702 /* we have to put the same argument on the stack for this to work */
2703 /* and this will be done by pp_restore */
2704 slf_restore.op_next = (OP *)&slf_restore;
2705 slf_restore.op_type = OP_CUSTOM;
2706 slf_restore.op_ppaddr = pp_restore;
2707 slf_restore.op_first = PL_op;
2708
2709 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2710
2711 if (PL_op->op_flags & OPf_STACKED)
2712 {
2713 if (items > slf_arga)
2714 {
2715 slf_arga = items;
2716 Safefree (slf_argv);
2717 New (0, slf_argv, slf_arga, SV *);
2718 }
2719
2720 slf_argc = items;
2721
2722 for (i = 0; i < items; ++i)
2723 slf_argv [i] = SvREFCNT_inc (arg [i]);
2724 }
2725 else
2726 slf_argc = 0;
2727
2728 PL_op->op_ppaddr = pp_slf;
2729 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2730
2731 PL_op = (OP *)&slf_restore;
2732}
2733
2734/*****************************************************************************/
2735/* dynamic wind */
2736
2737static void
2738on_enterleave_call (pTHX_ SV *cb)
2739{
2740 dSP;
2741
2742 PUSHSTACK;
2743
2744 PUSHMARK (SP);
2745 PUTBACK;
2746 call_sv (cb, G_VOID | G_DISCARD);
2747 SPAGAIN;
2748
2749 POPSTACK;
2750}
2751
2752static SV *
2753coro_avp_pop_and_free (pTHX_ AV **avp)
2754{
2755 AV *av = *avp;
2756 SV *res = av_pop (av);
2757
2758 if (AvFILLp (av) < 0)
2759 {
2760 *avp = 0;
2761 SvREFCNT_dec (av);
2762 }
2763
2764 return res;
2765}
2766
2767static void
2768coro_pop_on_enter (pTHX_ void *coro)
2769{
2770 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2771 SvREFCNT_dec (cb);
2772}
2773
2774static void
2775coro_pop_on_leave (pTHX_ void *coro)
2776{
2777 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2778 on_enterleave_call (aTHX_ sv_2mortal (cb));
2779}
2780
2781/*****************************************************************************/
2782/* PerlIO::cede */
2783
2784typedef struct
2785{
2786 PerlIOBuf base;
2787 NV next, every;
2788} PerlIOCede;
2789
2790static IV ecb_cold
2791PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2792{
2793 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2794
2795 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2796 self->next = nvtime () + self->every;
2797
2798 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2799}
2800
2801static SV * ecb_cold
2802PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2803{
2804 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2805
2806 return newSVnv (self->every);
2807}
2808
2809static IV
2810PerlIOCede_flush (pTHX_ PerlIO *f)
2811{
2812 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2813 double now = nvtime ();
2814
2815 if (now >= self->next)
2816 {
2817 api_cede (aTHX);
2818 self->next = now + self->every;
2819 }
2820
2821 return PerlIOBuf_flush (aTHX_ f);
2822}
2823
2824static PerlIO_funcs PerlIO_cede =
2825{
2826 sizeof(PerlIO_funcs),
2827 "cede",
2828 sizeof(PerlIOCede),
2829 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2830 PerlIOCede_pushed,
2831 PerlIOBuf_popped,
2832 PerlIOBuf_open,
2833 PerlIOBase_binmode,
2834 PerlIOCede_getarg,
2835 PerlIOBase_fileno,
2836 PerlIOBuf_dup,
2837 PerlIOBuf_read,
2838 PerlIOBuf_unread,
2839 PerlIOBuf_write,
2840 PerlIOBuf_seek,
2841 PerlIOBuf_tell,
2842 PerlIOBuf_close,
2843 PerlIOCede_flush,
2844 PerlIOBuf_fill,
2845 PerlIOBase_eof,
2846 PerlIOBase_error,
2847 PerlIOBase_clearerr,
2848 PerlIOBase_setlinebuf,
2849 PerlIOBuf_get_base,
2850 PerlIOBuf_bufsiz,
2851 PerlIOBuf_get_ptr,
2852 PerlIOBuf_get_cnt,
2853 PerlIOBuf_set_ptrcnt,
2854};
2855
2856/*****************************************************************************/
2857/* Coro::Semaphore & Coro::Signal */
2858
2859static SV *
2860coro_waitarray_new (pTHX_ int count)
2861{
2862 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2863 AV *av = newAV ();
2864 SV **ary;
2865
2866 /* unfortunately, building manually saves memory */
2867 Newx (ary, 2, SV *);
2868 AvALLOC (av) = ary;
2869#if PERL_VERSION_ATLEAST (5,10,0)
2870 AvARRAY (av) = ary;
2871#else
2872 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2873 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2874 SvPVX ((SV *)av) = (char *)ary;
2875#endif
2876 AvMAX (av) = 1;
2877 AvFILLp (av) = 0;
2878 ary [0] = newSViv (count);
2879
2880 return newRV_noinc ((SV *)av);
2881}
2882
2883/* semaphore */
2884
2885static void
2886coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2887{
2888 SV *count_sv = AvARRAY (av)[0];
2889 IV count = SvIVX (count_sv);
2890
2891 count += adjust;
2892 SvIVX (count_sv) = count;
2893
2894 /* now wake up as many waiters as are expected to lock */
2895 while (count > 0 && AvFILLp (av) > 0)
2896 {
2897 SV *cb;
2898
2899 /* swap first two elements so we can shift a waiter */
2900 AvARRAY (av)[0] = AvARRAY (av)[1];
2901 AvARRAY (av)[1] = count_sv;
2902 cb = av_shift (av);
2903
2904 if (SvOBJECT (cb))
2905 {
2906 api_ready (aTHX_ cb);
2907 --count;
2908 }
2909 else if (SvTYPE (cb) == SVt_PVCV)
2910 {
2911 dSP;
2912 PUSHMARK (SP);
2913 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2914 PUTBACK;
2915 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2916 }
2917
2918 SvREFCNT_dec (cb);
2919 }
2920}
2921
2922static void
2923coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2924{
2925 /* call $sem->adjust (0) to possibly wake up some other waiters */
2926 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2927}
2928
971static void 2929static int
972api_cede (void) 2930slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
973{ 2931{
974 dTHX; 2932 AV *av = (AV *)frame->data;
975 struct transfer_args ta; 2933 SV *count_sv = AvARRAY (av)[0];
2934 SV *coro_hv = SvRV (coro_current);
976 2935
977 prepare_cede (&ta); 2936 /* if we are about to throw, don't actually acquire the lock, just throw */
978 TRANSFER (ta); 2937 if (CORO_THROW)
979} 2938 return 0;
2939 else if (SvIVX (count_sv) > 0)
2940 {
2941 frame->destroy = 0;
980 2942
2943 if (acquire)
2944 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2945 else
2946 coro_semaphore_adjust (aTHX_ av, 0);
2947
2948 return 0;
2949 }
2950 else
2951 {
2952 int i;
2953 /* if we were woken up but can't down, we look through the whole */
2954 /* waiters list and only add us if we aren't in there already */
2955 /* this avoids some degenerate memory usage cases */
2956 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2957 if (AvARRAY (av)[i] == coro_hv)
2958 return 1;
2959
2960 av_push (av, SvREFCNT_inc (coro_hv));
2961 return 1;
2962 }
2963}
2964
2965static int
2966slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2967{
2968 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2969}
2970
2971static int
2972slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2973{
2974 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2975}
2976
2977static void
2978slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2979{
2980 AV *av = (AV *)SvRV (arg [0]);
2981
2982 if (SvIVX (AvARRAY (av)[0]) > 0)
2983 {
2984 frame->data = (void *)av;
2985 frame->prepare = prepare_nop;
2986 }
2987 else
2988 {
2989 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2990
2991 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2992 frame->prepare = prepare_schedule;
2993 /* to avoid race conditions when a woken-up coro gets terminated */
2994 /* we arrange for a temporary on_destroy that calls adjust (0) */
2995 frame->destroy = coro_semaphore_destroy;
2996 }
2997}
2998
2999static void
3000slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3001{
3002 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3003 frame->check = slf_check_semaphore_down;
3004}
3005
3006static void
3007slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3008{
3009 if (items >= 2)
3010 {
3011 /* callback form */
3012 AV *av = (AV *)SvRV (arg [0]);
3013 SV *cb_cv = s_get_cv_croak (arg [1]);
3014
3015 av_push (av, SvREFCNT_inc_NN (cb_cv));
3016
3017 if (SvIVX (AvARRAY (av)[0]) > 0)
3018 coro_semaphore_adjust (aTHX_ av, 0);
3019
3020 frame->prepare = prepare_nop;
3021 frame->check = slf_check_nop;
3022 }
3023 else
3024 {
3025 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3026 frame->check = slf_check_semaphore_wait;
3027 }
3028}
3029
3030/* signal */
3031
3032static void
3033coro_signal_wake (pTHX_ AV *av, int count)
3034{
3035 SvIVX (AvARRAY (av)[0]) = 0;
3036
3037 /* now signal count waiters */
3038 while (count > 0 && AvFILLp (av) > 0)
3039 {
3040 SV *cb;
3041
3042 /* swap first two elements so we can shift a waiter */
3043 cb = AvARRAY (av)[0];
3044 AvARRAY (av)[0] = AvARRAY (av)[1];
3045 AvARRAY (av)[1] = cb;
3046
3047 cb = av_shift (av);
3048
3049 if (SvTYPE (cb) == SVt_PVCV)
3050 {
3051 dSP;
3052 PUSHMARK (SP);
3053 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3054 PUTBACK;
3055 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3056 }
3057 else
3058 {
3059 api_ready (aTHX_ cb);
3060 sv_setiv (cb, 0); /* signal waiter */
3061 }
3062
3063 SvREFCNT_dec (cb);
3064
3065 --count;
3066 }
3067}
3068
3069static int
3070slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3071{
3072 /* if we are about to throw, also stop waiting */
3073 return SvROK ((SV *)frame->data) && !CORO_THROW;
3074}
3075
3076static void
3077slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3078{
3079 AV *av = (AV *)SvRV (arg [0]);
3080
3081 if (items >= 2)
3082 {
3083 SV *cb_cv = s_get_cv_croak (arg [1]);
3084 av_push (av, SvREFCNT_inc_NN (cb_cv));
3085
3086 if (SvIVX (AvARRAY (av)[0]))
3087 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3088
3089 frame->prepare = prepare_nop;
3090 frame->check = slf_check_nop;
3091 }
3092 else if (SvIVX (AvARRAY (av)[0]))
3093 {
3094 SvIVX (AvARRAY (av)[0]) = 0;
3095 frame->prepare = prepare_nop;
3096 frame->check = slf_check_nop;
3097 }
3098 else
3099 {
3100 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3101
3102 av_push (av, waiter);
3103
3104 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3105 frame->prepare = prepare_schedule;
3106 frame->check = slf_check_signal_wait;
3107 }
3108}
3109
3110/*****************************************************************************/
3111/* Coro::AIO */
3112
3113#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3114
3115/* helper storage struct */
3116struct io_state
3117{
3118 int errorno;
3119 I32 laststype; /* U16 in 5.10.0 */
3120 int laststatval;
3121 Stat_t statcache;
3122};
3123
3124static void
3125coro_aio_callback (pTHX_ CV *cv)
3126{
3127 dXSARGS;
3128 AV *state = (AV *)S_GENSUB_ARG;
3129 SV *coro = av_pop (state);
3130 SV *data_sv = newSV (sizeof (struct io_state));
3131
3132 av_extend (state, items - 1);
3133
3134 sv_upgrade (data_sv, SVt_PV);
3135 SvCUR_set (data_sv, sizeof (struct io_state));
3136 SvPOK_only (data_sv);
3137
3138 {
3139 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3140
3141 data->errorno = errno;
3142 data->laststype = PL_laststype;
3143 data->laststatval = PL_laststatval;
3144 data->statcache = PL_statcache;
3145 }
3146
3147 /* now build the result vector out of all the parameters and the data_sv */
3148 {
3149 int i;
3150
3151 for (i = 0; i < items; ++i)
3152 av_push (state, SvREFCNT_inc_NN (ST (i)));
3153 }
3154
3155 av_push (state, data_sv);
3156
3157 api_ready (aTHX_ coro);
3158 SvREFCNT_dec (coro);
3159 SvREFCNT_dec ((AV *)state);
3160}
3161
3162static int
3163slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3164{
3165 AV *state = (AV *)frame->data;
3166
3167 /* if we are about to throw, return early */
3168 /* this does not cancel the aio request, but at least */
3169 /* it quickly returns */
3170 if (CORO_THROW)
3171 return 0;
3172
3173 /* one element that is an RV? repeat! */
3174 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3175 return 1;
3176
3177 /* restore status */
3178 {
3179 SV *data_sv = av_pop (state);
3180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3181
3182 errno = data->errorno;
3183 PL_laststype = data->laststype;
3184 PL_laststatval = data->laststatval;
3185 PL_statcache = data->statcache;
3186
3187 SvREFCNT_dec (data_sv);
3188 }
3189
3190 /* push result values */
3191 {
3192 dSP;
3193 int i;
3194
3195 EXTEND (SP, AvFILLp (state) + 1);
3196 for (i = 0; i <= AvFILLp (state); ++i)
3197 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3198
3199 PUTBACK;
3200 }
3201
3202 return 0;
3203}
3204
3205static void
3206slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3207{
3208 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3209 SV *coro_hv = SvRV (coro_current);
3210 struct coro *coro = SvSTATE_hv (coro_hv);
3211
3212 /* put our coroutine id on the state arg */
3213 av_push (state, SvREFCNT_inc_NN (coro_hv));
3214
3215 /* first see whether we have a non-zero priority and set it as AIO prio */
3216 if (coro->prio)
3217 {
3218 dSP;
3219
3220 static SV *prio_cv;
3221 static SV *prio_sv;
3222
3223 if (ecb_expect_false (!prio_cv))
3224 {
3225 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3226 prio_sv = newSViv (0);
3227 }
3228
3229 PUSHMARK (SP);
3230 sv_setiv (prio_sv, coro->prio);
3231 XPUSHs (prio_sv);
3232
3233 PUTBACK;
3234 call_sv (prio_cv, G_VOID | G_DISCARD);
3235 }
3236
3237 /* now call the original request */
3238 {
3239 dSP;
3240 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3241 int i;
3242
3243 PUSHMARK (SP);
3244
3245 /* first push all args to the stack */
3246 EXTEND (SP, items + 1);
3247
3248 for (i = 0; i < items; ++i)
3249 PUSHs (arg [i]);
3250
3251 /* now push the callback closure */
3252 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3253
3254 /* now call the AIO function - we assume our request is uncancelable */
3255 PUTBACK;
3256 call_sv ((SV *)req, G_VOID | G_DISCARD);
3257 }
3258
3259 /* now that the request is going, we loop till we have a result */
3260 frame->data = (void *)state;
3261 frame->prepare = prepare_schedule;
3262 frame->check = slf_check_aio_req;
3263}
3264
3265static void
3266coro_aio_req_xs (pTHX_ CV *cv)
3267{
3268 dXSARGS;
3269
3270 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3271
3272 XSRETURN_EMPTY;
3273}
3274
3275/*****************************************************************************/
3276
3277#if CORO_CLONE
3278# include "clone.c"
3279#endif
3280
3281/*****************************************************************************/
3282
3283static SV *
3284coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3285{
3286 SV *coro_sv;
3287 struct coro *coro;
3288 MAGIC *mg;
3289 HV *hv;
3290 SV *cb;
3291 int i;
3292
3293 if (argc > 0)
3294 {
3295 cb = s_get_cv_croak (argv [0]);
3296
3297 if (!is_coro)
3298 {
3299 if (CvISXSUB (cb))
3300 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3301
3302 if (!CvROOT (cb))
3303 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3304 }
3305 }
3306
3307 Newz (0, coro, 1, struct coro);
3308 coro->args = newAV ();
3309 coro->flags = CF_NEW;
3310
3311 if (coro_first) coro_first->prev = coro;
3312 coro->next = coro_first;
3313 coro_first = coro;
3314
3315 coro->hv = hv = newHV ();
3316 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3317 mg->mg_flags |= MGf_DUP;
3318 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3319
3320 if (argc > 0)
3321 {
3322 av_extend (coro->args, argc + is_coro - 1);
3323
3324 if (is_coro)
3325 {
3326 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3327 cb = (SV *)cv_coro_run;
3328 }
3329
3330 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3331
3332 for (i = 1; i < argc; i++)
3333 av_push (coro->args, newSVsv (argv [i]));
3334 }
3335
3336 return coro_sv;
3337}
3338
3339#ifndef __cplusplus
3340ecb_cold XS(boot_Coro__State);
3341#endif
3342
3343#if CORO_JIT
3344
3345static void ecb_noinline ecb_cold
3346pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3347{
3348 dSP;
3349 AV *av = newAV ();
3350
3351 av_store (av, 3, newSVuv (d));
3352 av_store (av, 2, newSVuv (c));
3353 av_store (av, 1, newSVuv (b));
3354 av_store (av, 0, newSVuv (a));
3355
3356 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3357
3358 PUTBACK;
3359}
3360
3361static void ecb_noinline ecb_cold
3362jit_init (pTHX)
3363{
3364 dSP;
3365 SV *load, *save;
3366 char *map_base;
3367 char *load_ptr, *save_ptr;
3368 STRLEN load_len, save_len, map_len;
3369 int count;
3370
3371 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3372
3373 PUSHMARK (SP);
3374 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3375 #include "state.h"
3376 count = call_pv ("Coro::State::_jit", G_ARRAY);
3377 SPAGAIN;
3378
3379 save = POPs; save_ptr = SvPVbyte (save, save_len);
3380 load = POPs; load_ptr = SvPVbyte (load, load_len);
3381
3382 map_len = load_len + save_len + 16;
3383
3384 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3385
3386 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3387
3388 load_perl_slots = (load_save_perl_slots_type)map_base;
3389 memcpy (map_base, load_ptr, load_len);
3390
3391 map_base += (load_len + 15) & ~15;
3392
3393 save_perl_slots = (load_save_perl_slots_type)map_base;
3394 memcpy (map_base, save_ptr, save_len);
3395
3396 /* we are good citizens and try to make the page read-only, so the evil evil */
3397 /* hackers might have it a bit more difficult */
3398 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3399
3400 PUTBACK;
3401 eval_pv ("undef &Coro::State::_jit", 1);
3402}
3403
3404#endif
3405
981MODULE = Coro::State PACKAGE = Coro::State 3406MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
982 3407
983PROTOTYPES: DISABLE 3408PROTOTYPES: DISABLE
984 3409
985BOOT: 3410BOOT:
986{ 3411{
987#ifdef USE_ITHREADS 3412#ifdef USE_ITHREADS
988 MUTEX_INIT (&coro_mutex); 3413# if CORO_PTHREAD
3414 coro_thx = PERL_GET_CONTEXT;
989#endif 3415# endif
990 BOOT_PAGESIZE; 3416#endif
3417 /* perl defines these to check for existance first, but why it doesn't */
3418 /* just create them one at init time is not clear to me, except for */
3419 /* programs trying to delete them, but... */
3420 /* anyway, we declare this as invalid and make sure they are initialised here */
3421 DEFSV;
3422 ERRSV;
3423
3424 cctx_current = cctx_new_empty ();
3425
3426 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3427 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3428
3429 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3430 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3431 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3432
3433 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3434 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3435 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
991 3436
992 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3437 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993 3438
994 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3439 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
995 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3440 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
996 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3441 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3442 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
997 3443
998 main_mainstack = PL_mainstack; 3444 main_mainstack = PL_mainstack;
3445 main_top_env = PL_top_env;
999 3446
3447 while (main_top_env->je_prev)
3448 main_top_env = main_top_env->je_prev;
3449
3450 {
3451 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3452
3453 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3454 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3455
3456 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3457 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3458 }
3459
1000 coroapi.ver = CORO_API_VERSION; 3460 coroapi.ver = CORO_API_VERSION;
3461 coroapi.rev = CORO_API_REVISION;
3462
1001 coroapi.transfer = api_transfer; 3463 coroapi.transfer = api_transfer;
1002 3464
1003 Newz (0, main_stack, 1, coro_stack); 3465 coroapi.sv_state = SvSTATE_;
1004 main_stack->idle_sp = (void *)-1; 3466 coroapi.execute_slf = api_execute_slf;
3467 coroapi.prepare_nop = prepare_nop;
3468 coroapi.prepare_schedule = prepare_schedule;
3469 coroapi.prepare_cede = prepare_cede;
3470 coroapi.prepare_cede_notself = prepare_cede_notself;
1005 3471
3472 time_init (aTHX);
3473
1006 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3474 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3475#if CORO_JIT
3476 PUTBACK;
3477 jit_init (aTHX);
3478 SPAGAIN;
3479#endif
1007} 3480}
1008 3481
1009SV * 3482SV *
1010new (char *klass, ...) 3483new (SV *klass, ...)
3484 ALIAS:
3485 Coro::new = 1
1011 CODE: 3486 CODE:
1012{ 3487 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1013 struct coro *coro; 3488 OUTPUT:
1014 HV *hv; 3489 RETVAL
1015 int i;
1016 3490
1017 Newz (0, coro, 1, struct coro); 3491void
1018 coro->args = newAV (); 3492transfer (...)
3493 PROTOTYPE: $$
3494 CODE:
3495 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1019 3496
3497SV *
3498clone (Coro::State coro)
3499 CODE:
3500{
3501#if CORO_CLONE
3502 struct coro *ncoro = coro_clone (aTHX_ coro);
3503 MAGIC *mg;
3504 /* TODO: too much duplication */
1020 hv = newHV (); 3505 ncoro->hv = newHV ();
1021 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3506 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3507 mg->mg_flags |= MGf_DUP;
1022 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3508 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3509#else
3510 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3511#endif
3512}
3513 OUTPUT:
3514 RETVAL
1023 3515
1024 for (i = 1; i < items; i++) 3516int
1025 av_push (coro->args, newSVsv (ST (i))); 3517cctx_stacksize (int new_stacksize = 0)
3518 PROTOTYPE: ;$
3519 CODE:
3520 RETVAL = cctx_stacksize;
3521 if (new_stacksize)
3522 {
3523 cctx_stacksize = new_stacksize;
3524 ++cctx_gen;
3525 }
3526 OUTPUT:
3527 RETVAL
1026 3528
1027 coro->stack = main_stack; 3529int
1028 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3530cctx_max_idle (int max_idle = 0)
1029 /*coro->stack = 0;*/ 3531 PROTOTYPE: ;$
3532 CODE:
3533 RETVAL = cctx_max_idle;
3534 if (max_idle > 1)
3535 cctx_max_idle = max_idle;
3536 OUTPUT:
3537 RETVAL
3538
3539int
3540cctx_count ()
3541 PROTOTYPE:
3542 CODE:
3543 RETVAL = cctx_count;
3544 OUTPUT:
3545 RETVAL
3546
3547int
3548cctx_idle ()
3549 PROTOTYPE:
3550 CODE:
3551 RETVAL = cctx_idle;
3552 OUTPUT:
3553 RETVAL
3554
3555void
3556list ()
3557 PROTOTYPE:
3558 PPCODE:
3559{
3560 struct coro *coro;
3561 for (coro = coro_first; coro; coro = coro->next)
3562 if (coro->hv)
3563 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3564}
3565
3566void
3567call (Coro::State coro, SV *coderef)
3568 ALIAS:
3569 eval = 1
3570 CODE:
3571{
3572 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3573 {
3574 struct coro *current = SvSTATE_current;
3575 struct CoroSLF slf_save;
3576
3577 if (current != coro)
3578 {
3579 PUTBACK;
3580 save_perl (aTHX_ current);
3581 load_perl (aTHX_ coro);
3582 /* the coro is most likely in an active SLF call.
3583 * while not strictly required (the code we execute is
3584 * not allowed to call any SLF functions), it's cleaner
3585 * to reinitialise the slf_frame and restore it later.
3586 * This might one day allow us to actually do SLF calls
3587 * from code executed here.
3588 */
3589 slf_save = slf_frame;
3590 slf_frame.prepare = 0;
3591 SPAGAIN;
3592 }
3593
3594 PUSHSTACK;
3595
3596 PUSHMARK (SP);
3597 PUTBACK;
3598
3599 if (ix)
3600 eval_sv (coderef, 0);
3601 else
3602 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3603
3604 POPSTACK;
3605 SPAGAIN;
3606
3607 if (current != coro)
3608 {
3609 PUTBACK;
3610 slf_frame = slf_save;
3611 save_perl (aTHX_ coro);
3612 load_perl (aTHX_ current);
3613 SPAGAIN;
3614 }
3615 }
3616}
3617
3618SV *
3619is_ready (Coro::State coro)
3620 PROTOTYPE: $
3621 ALIAS:
3622 is_ready = CF_READY
3623 is_running = CF_RUNNING
3624 is_new = CF_NEW
3625 is_destroyed = CF_ZOMBIE
3626 is_zombie = CF_ZOMBIE
3627 is_suspended = CF_SUSPENDED
3628 CODE:
3629 RETVAL = boolSV (coro->flags & ix);
3630 OUTPUT:
3631 RETVAL
3632
3633void
3634throw (SV *self, SV *exception = &PL_sv_undef)
3635 PROTOTYPE: $;$
3636 CODE:
3637{
3638 struct coro *coro = SvSTATE (self);
3639 struct coro *current = SvSTATE_current;
3640 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3641 SvREFCNT_dec (*exceptionp);
3642 SvGETMAGIC (exception);
3643 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3644
3645 api_ready (aTHX_ self);
3646}
3647
3648void
3649api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3650 PROTOTYPE: $;$
3651 C_ARGS: aTHX_ coro, flags
3652
3653SV *
3654has_cctx (Coro::State coro)
3655 PROTOTYPE: $
3656 CODE:
3657 /* maybe manage the running flag differently */
3658 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3659 OUTPUT:
3660 RETVAL
3661
3662int
3663is_traced (Coro::State coro)
3664 PROTOTYPE: $
3665 CODE:
3666 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3667 OUTPUT:
3668 RETVAL
3669
3670UV
3671rss (Coro::State coro)
3672 PROTOTYPE: $
3673 ALIAS:
3674 usecount = 1
3675 CODE:
3676 switch (ix)
3677 {
3678 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3679 case 1: RETVAL = coro->usecount; break;
3680 }
3681 OUTPUT:
3682 RETVAL
3683
3684void
3685force_cctx ()
3686 PROTOTYPE:
3687 CODE:
3688 cctx_current->idle_sp = 0;
3689
3690void
3691swap_defsv (Coro::State self)
3692 PROTOTYPE: $
3693 ALIAS:
3694 swap_defav = 1
3695 CODE:
3696 if (!self->slot)
3697 croak ("cannot swap state with coroutine that has no saved state,");
3698 else
3699 {
3700 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3701 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3702
3703 SV *tmp = *src; *src = *dst; *dst = tmp;
3704 }
3705
3706void
3707cancel (Coro::State self)
3708 CODE:
3709 coro_state_destroy (aTHX_ self);
3710
3711SV *
3712enable_times (int enabled = enable_times)
3713 CODE:
3714{
3715 RETVAL = boolSV (enable_times);
3716
3717 if (enabled != enable_times)
3718 {
3719 enable_times = enabled;
3720
3721 coro_times_update ();
3722 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3723 }
1030} 3724}
1031 OUTPUT: 3725 OUTPUT:
1032 RETVAL 3726 RETVAL
1033 3727
1034void 3728void
1035transfer (...) 3729times (Coro::State self)
1036 ALIAS: 3730 PPCODE:
1037 Coro::schedule = 1
1038 Coro::cede = 2
1039 _set_stacklevel = 3
1040 CODE:
1041{ 3731{
1042 struct transfer_args ta; 3732 struct coro *current = SvSTATE (coro_current);
1043 3733
1044 switch (ix) 3734 if (ecb_expect_false (current == self))
1045 { 3735 {
1046 case 0: 3736 coro_times_update ();
1047 if (items != 3) 3737 coro_times_add (SvSTATE (coro_current));
1048 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1049
1050 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051 break;
1052
1053 case 1:
1054 prepare_schedule (&ta);
1055 break;
1056
1057 case 2:
1058 prepare_cede (&ta);
1059 break;
1060
1061 case 3:
1062 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1063 ta.next = 0;
1064 ta.flags = TRANSFER_SET_STACKLEVEL;
1065 break;
1066 } 3738 }
1067 3739
1068 TRANSFER (ta); 3740 EXTEND (SP, 2);
3741 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3742 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3743
3744 if (ecb_expect_false (current == self))
3745 coro_times_sub (SvSTATE (coro_current));
1069} 3746}
1070 3747
1071void 3748void
1072_clone_state_from (SV *dst, SV *src) 3749swap_sv (Coro::State coro, SV *sv, SV *swapsv)
1073 CODE: 3750 CODE:
1074{ 3751{
1075 struct coro *coro_src = SvSTATE (src); 3752 struct coro *current = SvSTATE_current;
1076 3753
1077 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3754 if (current == coro)
3755 SWAP_SVS (current);
1078 3756
1079 ++coro_src->refcnt; 3757 if (!coro->swap_sv)
1080 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 3758 coro->swap_sv = newAV ();
1081}
1082 3759
1083void 3760 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
1084_nonlocal_goto (IV nextop) 3761 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
1085 CODE:
1086 /* uuh, somebody will kill me again for this */
1087 PL_op->op_next = INT2PTR (OP *, nextop);
1088 3762
1089void 3763 if (current == coro)
1090_exit (code) 3764 SWAP_SVS (current);
1091 int code
1092 PROTOTYPE: $
1093 CODE:
1094 _exit (code);
1095
1096MODULE = Coro::State PACKAGE = Coro::Cont
1097
1098void
1099yield (...)
1100 PROTOTYPE: @
1101 CODE:
1102{
1103 SV *yieldstack;
1104 SV *sv;
1105 AV *defav = GvAV (PL_defgv);
1106 struct coro *prev, *next;
1107
1108 yieldstack = *hv_fetch (
1109 (HV *)SvRV (GvSV (coro_current)),
1110 "yieldstack", sizeof ("yieldstack") - 1,
1111 0
1112 );
1113
1114 /* set up @_ -- ugly */
1115 av_clear (defav);
1116 av_fill (defav, items - 1);
1117 while (items--)
1118 av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120 sv = av_pop ((AV *)SvRV (yieldstack));
1121 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123 SvREFCNT_dec (sv);
1124
1125 coro_state_transfer (aTHX_ prev, next, 0);
1126} 3765}
3766
1127 3767
1128MODULE = Coro::State PACKAGE = Coro 3768MODULE = Coro::State PACKAGE = Coro
1129 3769
1130BOOT: 3770BOOT:
1131{ 3771{
1132 int i; 3772 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3773 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3774 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3775 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3776 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3777 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3778 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3779 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1133 3780
3781 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3782 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3783 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3784 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3785
1134 coro_stash = gv_stashpv ("Coro", TRUE); 3786 coro_stash = gv_stashpv ("Coro", TRUE);
1135 3787
1136 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3788 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1137 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3789 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1138 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3790 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1139 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3791 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1140 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3792 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1141 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3793 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1142
1143 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1144 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1145
1146 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147 coro_ready[i] = newAV ();
1148 3794
1149 { 3795 {
1150 SV *sv = perl_get_sv("Coro::API", 1); 3796 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1151 3797
1152 coroapi.schedule = api_schedule; 3798 coroapi.schedule = api_schedule;
3799 coroapi.schedule_to = api_schedule_to;
1153 coroapi.cede = api_cede; 3800 coroapi.cede = api_cede;
3801 coroapi.cede_notself = api_cede_notself;
1154 coroapi.ready = api_ready; 3802 coroapi.ready = api_ready;
3803 coroapi.is_ready = api_is_ready;
1155 coroapi.nready = &coro_nready; 3804 coroapi.nready = coro_nready;
1156 coroapi.current = coro_current; 3805 coroapi.current = coro_current;
1157 3806
1158 GCoroAPI = &coroapi; 3807 /*GCoroAPI = &coroapi;*/
1159 sv_setiv (sv, (IV)&coroapi); 3808 sv_setiv (sv, (IV)&coroapi);
1160 SvREADONLY_on (sv); 3809 SvREADONLY_on (sv);
1161 } 3810 }
1162} 3811}
1163 3812
3813SV *
3814async (...)
3815 PROTOTYPE: &@
3816 CODE:
3817 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3818 api_ready (aTHX_ RETVAL);
3819 OUTPUT:
3820 RETVAL
3821
3822void
3823_destroy (Coro::State coro)
3824 CODE:
3825 /* used by the manager thread */
3826 coro_state_destroy (aTHX_ coro);
3827
3828void
3829on_destroy (Coro::State coro, SV *cb)
3830 CODE:
3831 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3832
3833void
3834join (...)
3835 CODE:
3836 CORO_EXECUTE_SLF_XS (slf_init_join);
3837
3838void
3839terminate (...)
3840 CODE:
3841 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3842
3843void
3844cancel (...)
3845 CODE:
3846 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3847
3848int
3849safe_cancel (Coro::State self, ...)
3850 C_ARGS: aTHX_ self, &ST (1), items - 1
3851
3852void
3853schedule (...)
3854 CODE:
3855 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3856
3857void
3858schedule_to (...)
3859 CODE:
3860 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3861
3862void
3863cede_to (...)
3864 CODE:
3865 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3866
3867void
3868cede (...)
3869 CODE:
3870 CORO_EXECUTE_SLF_XS (slf_init_cede);
3871
3872void
3873cede_notself (...)
3874 CODE:
3875 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3876
3877void
3878_set_current (SV *current)
3879 PROTOTYPE: $
3880 CODE:
3881 SvREFCNT_dec (SvRV (coro_current));
3882 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3883
3884void
3885_set_readyhook (SV *hook)
3886 PROTOTYPE: $
3887 CODE:
3888 SvREFCNT_dec (coro_readyhook);
3889 SvGETMAGIC (hook);
3890 if (SvOK (hook))
3891 {
3892 coro_readyhook = newSVsv (hook);
3893 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3894 }
3895 else
3896 {
3897 coro_readyhook = 0;
3898 CORO_READYHOOK = 0;
3899 }
3900
1164int 3901int
1165prio (Coro::State coro, int newprio = 0) 3902prio (Coro::State coro, int newprio = 0)
3903 PROTOTYPE: $;$
1166 ALIAS: 3904 ALIAS:
1167 nice = 1 3905 nice = 1
1168 CODE: 3906 CODE:
1169{ 3907{
1170 RETVAL = coro->prio; 3908 RETVAL = coro->prio;
1171 3909
1172 if (items > 1) 3910 if (items > 1)
1173 { 3911 {
1174 if (ix) 3912 if (ix)
1175 newprio += coro->prio; 3913 newprio = coro->prio - newprio;
1176 3914
1177 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3915 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1178 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3916 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1179 3917
1180 coro->prio = newprio; 3918 coro->prio = newprio;
1181 } 3919 }
1182} 3920}
3921 OUTPUT:
3922 RETVAL
1183 3923
1184void 3924SV *
1185ready (SV *self) 3925ready (SV *self)
1186 PROTOTYPE: $ 3926 PROTOTYPE: $
1187 CODE: 3927 CODE:
1188 api_ready (self); 3928 RETVAL = boolSV (api_ready (aTHX_ self));
3929 OUTPUT:
3930 RETVAL
1189 3931
1190int 3932int
1191nready (...) 3933nready (...)
1192 PROTOTYPE: 3934 PROTOTYPE:
1193 CODE: 3935 CODE:
1194 RETVAL = coro_nready; 3936 RETVAL = coro_nready;
1195 OUTPUT: 3937 OUTPUT:
1196 RETVAL 3938 RETVAL
1197 3939
1198MODULE = Coro::State PACKAGE = Coro::AIO 3940void
3941suspend (Coro::State self)
3942 PROTOTYPE: $
3943 CODE:
3944 self->flags |= CF_SUSPENDED;
3945
3946void
3947resume (Coro::State self)
3948 PROTOTYPE: $
3949 CODE:
3950 self->flags &= ~CF_SUSPENDED;
3951
3952void
3953_pool_handler (...)
3954 CODE:
3955 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3956
3957void
3958async_pool (SV *cv, ...)
3959 PROTOTYPE: &@
3960 PPCODE:
3961{
3962 HV *hv = (HV *)av_pop (av_async_pool);
3963 AV *av = newAV ();
3964 SV *cb = ST (0);
3965 int i;
3966
3967 av_extend (av, items - 2);
3968 for (i = 1; i < items; ++i)
3969 av_push (av, SvREFCNT_inc_NN (ST (i)));
3970
3971 if ((SV *)hv == &PL_sv_undef)
3972 {
3973 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3974 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3975 SvREFCNT_dec (sv);
3976 }
3977
3978 {
3979 struct coro *coro = SvSTATE_hv (hv);
3980
3981 assert (!coro->invoke_cb);
3982 assert (!coro->invoke_av);
3983 coro->invoke_cb = SvREFCNT_inc (cb);
3984 coro->invoke_av = av;
3985 }
3986
3987 api_ready (aTHX_ (SV *)hv);
3988
3989 if (GIMME_V != G_VOID)
3990 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3991 else
3992 SvREFCNT_dec (hv);
3993}
1199 3994
1200SV * 3995SV *
1201_get_state () 3996rouse_cb ()
3997 PROTOTYPE:
1202 CODE: 3998 CODE:
1203{ 3999 RETVAL = coro_new_rouse_cb (aTHX);
1204 struct {
1205 int errorno;
1206 int laststype;
1207 int laststatval;
1208 Stat_t statcache;
1209 } data;
1210
1211 data.errorno = errno;
1212 data.laststype = PL_laststype;
1213 data.laststatval = PL_laststatval;
1214 data.statcache = PL_statcache;
1215
1216 RETVAL = newSVpvn ((char *)&data, sizeof data);
1217}
1218 OUTPUT: 4000 OUTPUT:
1219 RETVAL 4001 RETVAL
1220 4002
1221void 4003void
1222_set_state (char *data_) 4004rouse_wait (...)
4005 PROTOTYPE: ;$
4006 PPCODE:
4007 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4008
4009void
4010on_enter (SV *block)
4011 ALIAS:
4012 on_leave = 1
1223 PROTOTYPE: $ 4013 PROTOTYPE: &
1224 CODE: 4014 CODE:
1225{ 4015{
1226 struct { 4016 struct coro *coro = SvSTATE_current;
4017 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4018
4019 block = s_get_cv_croak (block);
4020
4021 if (!*avp)
4022 *avp = newAV ();
4023
4024 av_push (*avp, SvREFCNT_inc (block));
4025
4026 if (!ix)
4027 on_enterleave_call (aTHX_ block);
4028
4029 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4030 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4031 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4032}
4033
4034
4035MODULE = Coro::State PACKAGE = PerlIO::cede
4036
4037BOOT:
4038 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4039
4040
4041MODULE = Coro::State PACKAGE = Coro::Semaphore
4042
4043SV *
4044new (SV *klass, SV *count = 0)
4045 CODE:
4046{
4047 int semcnt = 1;
4048
4049 if (count)
4050 {
4051 SvGETMAGIC (count);
4052
4053 if (SvOK (count))
4054 semcnt = SvIV (count);
4055 }
4056
4057 RETVAL = sv_bless (
4058 coro_waitarray_new (aTHX_ semcnt),
4059 GvSTASH (CvGV (cv))
4060 );
4061}
4062 OUTPUT:
4063 RETVAL
4064
4065# helper for Coro::Channel and others
4066SV *
4067_alloc (int count)
4068 CODE:
4069 RETVAL = coro_waitarray_new (aTHX_ count);
4070 OUTPUT:
4071 RETVAL
4072
4073SV *
4074count (SV *self)
4075 CODE:
4076 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4077 OUTPUT:
4078 RETVAL
4079
4080void
4081up (SV *self, int adjust = 1)
4082 ALIAS:
4083 adjust = 1
4084 CODE:
4085 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4086
4087void
4088down (...)
4089 CODE:
4090 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4091
4092void
4093wait (...)
4094 CODE:
4095 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4096
4097void
4098try (SV *self)
4099 PPCODE:
4100{
4101 AV *av = (AV *)SvRV (self);
4102 SV *count_sv = AvARRAY (av)[0];
4103 IV count = SvIVX (count_sv);
4104
4105 if (count > 0)
4106 {
4107 --count;
4108 SvIVX (count_sv) = count;
4109 XSRETURN_YES;
4110 }
4111 else
4112 XSRETURN_NO;
4113}
4114
4115void
4116waiters (SV *self)
4117 PPCODE:
4118{
4119 AV *av = (AV *)SvRV (self);
4120 int wcount = AvFILLp (av) + 1 - 1;
4121
4122 if (GIMME_V == G_SCALAR)
4123 XPUSHs (sv_2mortal (newSViv (wcount)));
4124 else
4125 {
1227 int errorno; 4126 int i;
1228 int laststype; 4127 EXTEND (SP, wcount);
1229 int laststatval; 4128 for (i = 1; i <= wcount; ++i)
1230 Stat_t statcache; 4129 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1231 } *data = (void *)data_; 4130 }
1232
1233 errno = data->errorno;
1234 PL_laststype = data->laststype;
1235 PL_laststatval = data->laststatval;
1236 PL_statcache = data->statcache;
1237} 4131}
4132
4133MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4134
4135void
4136_may_delete (SV *sem, int count, unsigned int extra_refs)
4137 PPCODE:
4138{
4139 AV *av = (AV *)SvRV (sem);
4140
4141 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4142 && AvFILLp (av) == 0 /* no waiters, just count */
4143 && SvIV (AvARRAY (av)[0]) == count)
4144 XSRETURN_YES;
4145
4146 XSRETURN_NO;
4147}
4148
4149MODULE = Coro::State PACKAGE = Coro::Signal
4150
4151SV *
4152new (SV *klass)
4153 CODE:
4154 RETVAL = sv_bless (
4155 coro_waitarray_new (aTHX_ 0),
4156 GvSTASH (CvGV (cv))
4157 );
4158 OUTPUT:
4159 RETVAL
4160
4161void
4162wait (...)
4163 CODE:
4164 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4165
4166void
4167broadcast (SV *self)
4168 CODE:
4169{
4170 AV *av = (AV *)SvRV (self);
4171 coro_signal_wake (aTHX_ av, AvFILLp (av));
4172}
4173
4174void
4175send (SV *self)
4176 CODE:
4177{
4178 AV *av = (AV *)SvRV (self);
4179
4180 if (AvFILLp (av))
4181 coro_signal_wake (aTHX_ av, 1);
4182 else
4183 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4184}
4185
4186IV
4187awaited (SV *self)
4188 CODE:
4189 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4190 OUTPUT:
4191 RETVAL
4192
4193
4194MODULE = Coro::State PACKAGE = Coro::AnyEvent
4195
4196BOOT:
4197 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4198
4199void
4200_schedule (...)
4201 CODE:
4202{
4203 static int incede;
4204
4205 api_cede_notself (aTHX);
4206
4207 ++incede;
4208 while (coro_nready >= incede && api_cede (aTHX))
4209 ;
4210
4211 sv_setsv (sv_activity, &PL_sv_undef);
4212 if (coro_nready >= incede)
4213 {
4214 PUSHMARK (SP);
4215 PUTBACK;
4216 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4217 }
4218
4219 --incede;
4220}
4221
4222
4223MODULE = Coro::State PACKAGE = Coro::AIO
4224
4225void
4226_register (char *target, char *proto, SV *req)
4227 CODE:
4228{
4229 SV *req_cv = s_get_cv_croak (req);
4230 /* newXSproto doesn't return the CV on 5.8 */
4231 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4232 sv_setpv ((SV *)slf_cv, proto);
4233 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4234}
4235
4236MODULE = Coro::State PACKAGE = Coro::Select
4237
4238void
4239patch_pp_sselect ()
4240 CODE:
4241 if (!coro_old_pp_sselect)
4242 {
4243 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4244 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4245 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4246 }
4247
4248void
4249unpatch_pp_sselect ()
4250 CODE:
4251 if (coro_old_pp_sselect)
4252 {
4253 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4254 coro_old_pp_sselect = 0;
4255 }
4256
4257MODULE = Coro::State PACKAGE = Coro::Util
4258
4259void
4260_exit (int code)
4261 CODE:
4262 _exit (code);
4263
4264NV
4265time ()
4266 CODE:
4267 RETVAL = nvtime (aTHX);
4268 OUTPUT:
4269 RETVAL
4270
4271NV
4272gettimeofday ()
4273 PPCODE:
4274{
4275 UV tv [2];
4276 u2time (aTHX_ tv);
4277 EXTEND (SP, 2);
4278 PUSHs (sv_2mortal (newSVuv (tv [0])));
4279 PUSHs (sv_2mortal (newSVuv (tv [1])));
4280}
4281

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