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Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.421 by root, Sun May 27 16:36:05 2012 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
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"
17#include "ecb.h"
10 18
11#if PERL_VERSION < 6 19#include <stddef.h>
12# ifndef PL_ppaddr
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
32#include <stdio.h> 20#include <stdio.h>
33#include <errno.h> 21#include <errno.h>
22#include <assert.h>
34 23
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 24#ifndef SVs_PADSTALE
36# undef STACKGUARD 25# define SVs_PADSTALE 0
37#endif 26#endif
38 27
39#ifndef STACKGUARD 28#if defined(_WIN32)
40# define STACKGUARD 0 29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
41#endif 36#endif
42 37
43#ifdef HAVE_MMAP 38#if HAVE_MMAP
44# include <unistd.h> 39# include <unistd.h>
45# include <sys/mman.h> 40# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON 42# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
54# ifndef PAGESIZE 49# ifndef PAGESIZE
55# define PAGESIZE pagesize 50# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize; 52static long pagesize;
58# else 53# else
59# define BOOT_PAGESIZE 54# define BOOT_PAGESIZE (void)0
60# endif 55# endif
56#else
57# define PAGESIZE 0
58# define BOOT_PAGESIZE (void)0
61#endif 59#endif
62 60
63/* The next macro should declare a variable stacklevel that contains and approximation 61#if CORO_USE_VALGRIND
64 * to the current C stack pointer. Its property is that it changes with each call 62# include <valgrind/valgrind.h>
65 * and should be unique. */ 63#endif
64
65/* the maximum number of idle cctx that will be pooled */
66static int cctx_max_idle = 4;
67
68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
69# define HAS_SCOPESTACK_NAME 1
70#endif
71
72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
73# undef CORO_STACKGUARD
74#endif
75
76#ifndef CORO_STACKGUARD
77# define CORO_STACKGUARD 0
78#endif
79
80/* prefer perl internal functions over our own? */
81#ifndef CORO_PREFER_PERL_FUNCTIONS
82# define CORO_PREFER_PERL_FUNCTIONS 0
83#endif
84
85/* The next macros try to return the current stack pointer, in an as
86 * portable way as possible. */
87#if __GNUC__ >= 4
66#define dSTACKLEVEL int stacklevel 88# define dSTACKLEVEL int stacklevel_dummy
89# define STACKLEVEL __builtin_frame_address (0)
90#else
91# define dSTACKLEVEL volatile void *stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 92# define STACKLEVEL ((void *)&stacklevel)
93#endif
68 94
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 95#define IN_DESTRUCT PL_dirty
70 96
71#include "CoroAPI.h" 97#include "CoroAPI.h"
72 98#define GCoroAPI (&coroapi) /* very sneaky */
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74 99
75#ifdef USE_ITHREADS 100#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 101# if CORO_PTHREAD
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 102static void *coro_thx;
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif 103# endif
104#endif
83 105
106#ifdef __linux
107# include <time.h> /* for timespec */
108# include <syscall.h> /* for SYS_* */
109# ifdef SYS_clock_gettime
110# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
111# define CORO_CLOCK_MONOTONIC 1
112# define CORO_CLOCK_THREAD_CPUTIME_ID 3
113# endif
114#endif
115
116static double (*nvtime)(); /* so why doesn't it take void? */
117static void (*u2time)(pTHX_ UV ret[2]);
118
119/* we hijack an hopefully unused CV flag for our purposes */
120#define CVf_SLF 0x4000
121static OP *pp_slf (pTHX);
122static void slf_destroy (pTHX_ struct coro *coro);
123
124static U32 cctx_gen;
125static size_t cctx_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 126static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 127static AV *main_mainstack; /* used to differentiate between $main and others */
128static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 129static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 130static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
131
132static AV *av_destroy; /* destruction queue */
133static SV *sv_manager; /* the manager coro */
134static SV *sv_idle; /* $Coro::idle */
135
136static GV *irsgv; /* $/ */
137static GV *stdoutgv; /* *STDOUT */
138static SV *rv_diehook;
139static SV *rv_warnhook;
140static HV *hv_sig; /* %SIG */
141
142/* async_pool helper stuff */
143static SV *sv_pool_rss;
144static SV *sv_pool_size;
145static SV *sv_async_pool_idle; /* description string */
146static AV *av_async_pool; /* idle pool */
147static SV *sv_Coro; /* class string */
148static CV *cv_pool_handler;
149
150/* Coro::AnyEvent */
151static SV *sv_activity;
152
153/* enable processtime/realtime profiling */
154static char enable_times;
155typedef U32 coro_ts[2];
156static coro_ts time_real, time_cpu;
157static char times_valid;
158
159static struct coro_cctx *cctx_first;
160static int cctx_count, cctx_idle;
161
162enum
163{
164 CC_MAPPED = 0x01,
165 CC_NOREUSE = 0x02, /* throw this away after tracing */
166 CC_TRACE = 0x04,
167 CC_TRACE_SUB = 0x08, /* trace sub calls */
168 CC_TRACE_LINE = 0x10, /* trace each statement */
169 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
170};
88 171
89/* this is a structure representing a c-level coroutine */ 172/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 173typedef struct coro_cctx
174{
91 struct coro_stack *next; 175 struct coro_cctx *next;
92 176
93 /* the stack */ 177 /* the stack */
94 void *sptr; 178 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 179 size_t ssize;
96 180
97 /* cpu state */ 181 /* cpu state */
98 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 182 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
183#ifndef NDEBUG
184 JMPENV *idle_te; /* same as idle_sp, but for top_env */
185#endif
99 JMPENV *top_env; 186 JMPENV *top_env;
100 coro_context cctx; 187 coro_context cctx;
101} coro_stack; 188
189 U32 gen;
190#if CORO_USE_VALGRIND
191 int valgrind_id;
192#endif
193 unsigned char flags;
194} coro_cctx;
195
196static coro_cctx *cctx_current; /* the currently running cctx */
197
198/*****************************************************************************/
199
200static MGVTBL coro_state_vtbl;
201
202enum
203{
204 CF_RUNNING = 0x0001, /* coroutine is running */
205 CF_READY = 0x0002, /* coroutine is ready */
206 CF_NEW = 0x0004, /* has never been switched to */
207 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
208 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
209 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
210};
211
212/* the structure where most of the perl state is stored, overlaid on the cxstack */
213typedef struct
214{
215 #define VARx(name,expr,type) type name;
216 #include "state.h"
217} perl_slots;
218
219/* how many context stack entries do we need for perl_slots */
220#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 221
103/* this is a structure representing a perl-level coroutine */ 222/* this is a structure representing a perl-level coroutine */
104struct coro { 223struct coro
224{
105 /* the c coroutine allocated to this perl coroutine, if any */ 225 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 226 coro_cctx *cctx;
107 227
108 /* data associated with this coroutine (initial args) */ 228 /* ready queue */
109 AV *args; 229 struct coro *next_ready;
110 int refcnt;
111 230
112 /* optionally saved, might be zero */ 231 /* state data */
113 AV *defav; 232 struct CoroSLF slf_frame; /* saved slf frame */
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 233 AV *mainstack;
125 SV **stack_sp; 234 perl_slots *slot; /* basically the saved sp */
126 OP *op; 235
127 SV **curpad; 236 CV *startcv; /* the CV to execute */
128 AV *comppad; 237 AV *args; /* data associated with this coroutine (initial args) */
129 CV *compcv; 238 int flags; /* CF_ flags */
130 SV **stack_base; 239 HV *hv; /* the perl hash associated with this coro, if any */
131 SV **stack_max; 240
132 SV **tmps_stack; 241 /* statistics */
133 I32 tmps_floor; 242 int usecount; /* number of transfers to this coro */
134 I32 tmps_ix;
135 I32 tmps_max;
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 243
151 /* coro process data */ 244 /* coro process data */
152 int prio; 245 int prio;
246 SV *except; /* exception to be thrown */
247 SV *rouse_cb; /* last rouse callback */
248 AV *on_destroy; /* callbacks or coros to notify on destroy */
249 AV *status; /* the exit status list */
250
251 /* async_pool */
252 SV *saved_deffh;
253 SV *invoke_cb;
254 AV *invoke_av;
255
256 /* on_enter/on_leave */
257 AV *on_enter;
258 AV *on_leave;
259
260 /* swap_sv */
261 AV *swap_sv;
262
263 /* times */
264 coro_ts t_cpu, t_real;
265
266 /* linked list */
267 struct coro *next, *prev;
153}; 268};
154 269
155typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
157 272
273/* the following variables are effectively part of the perl context */
274/* and get copied between struct coro and these variables */
275/* the main reason we don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
277
278/** Coro ********************************************************************/
279
280#define CORO_PRIO_MAX 3
281#define CORO_PRIO_HIGH 1
282#define CORO_PRIO_NORMAL 0
283#define CORO_PRIO_LOW -1
284#define CORO_PRIO_IDLE -3
285#define CORO_PRIO_MIN -4
286
287/* for Coro.pm */
288static SV *coro_current;
289static SV *coro_readyhook;
290static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
291static CV *cv_coro_run;
292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** JIT *********************************************************************/
296
297#if CORO_JIT
298 /* APPLE doesn't have HAVE_MMAP though */
299 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
300 #ifndef CORO_JIT_TYPE
301 #if __x86_64 && CORO_JIT_UNIXY
302 #define CORO_JIT_TYPE "amd64-unix"
303 #elif __i386 && CORO_JIT_UNIXY
304 #define CORO_JIT_TYPE "x86-unix"
305 #endif
306 #endif
307#endif
308
309#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
310 #undef CORO_JIT
311#endif
312
313#if CORO_JIT
314 typedef void (*load_save_perl_slots_type)(perl_slots *);
315 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
316#endif
317
318/** Coro::Select ************************************************************/
319
320static OP *(*coro_old_pp_sselect) (pTHX);
321static SV *coro_select_select;
322
323/* horrible hack, but if it works... */
158static AV * 324static OP *
325coro_pp_sselect (pTHX)
326{
327 dSP;
328 PUSHMARK (SP - 4); /* fake argument list */
329 XPUSHs (coro_select_select);
330 PUTBACK;
331
332 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
333 PL_op->op_flags |= OPf_STACKED;
334 PL_op->op_private = 0;
335 return PL_ppaddr [OP_ENTERSUB](aTHX);
336}
337
338/** time stuff **************************************************************/
339
340#ifdef HAS_GETTIMEOFDAY
341
342ecb_inline void
343coro_u2time (pTHX_ UV ret[2])
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 ret [0] = tv.tv_sec;
349 ret [1] = tv.tv_usec;
350}
351
352ecb_inline double
353coro_nvtime (void)
354{
355 struct timeval tv;
356 gettimeofday (&tv, 0);
357
358 return tv.tv_sec + tv.tv_usec * 1e-6;
359}
360
361ecb_inline void
362time_init (pTHX)
363{
364 nvtime = coro_nvtime;
365 u2time = coro_u2time;
366}
367
368#else
369
370ecb_inline void
371time_init (pTHX)
372{
373 SV **svp;
374
375 require_pv ("Time/HiRes.pm");
376
377 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
378
379 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
380 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
381
382 nvtime = INT2PTR (double (*)(), SvIV (*svp));
383
384 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
385 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
386}
387
388#endif
389
390/** lowlevel stuff **********************************************************/
391
392static SV * ecb_noinline
393coro_get_sv (pTHX_ const char *name, int create)
394{
395#if PERL_VERSION_ATLEAST (5,10,0)
396 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
397 get_sv (name, create);
398#endif
399 return get_sv (name, create);
400}
401
402static AV * ecb_noinline
403coro_get_av (pTHX_ const char *name, int create)
404{
405#if PERL_VERSION_ATLEAST (5,10,0)
406 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
407 get_av (name, create);
408#endif
409 return get_av (name, create);
410}
411
412static HV * ecb_noinline
413coro_get_hv (pTHX_ const char *name, int create)
414{
415#if PERL_VERSION_ATLEAST (5,10,0)
416 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
417 get_hv (name, create);
418#endif
419 return get_hv (name, create);
420}
421
422ecb_inline void
423coro_times_update (void)
424{
425#ifdef coro_clock_gettime
426 struct timespec ts;
427
428 ts.tv_sec = ts.tv_nsec = 0;
429 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
430 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
431
432 ts.tv_sec = ts.tv_nsec = 0;
433 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
434 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
435#else
436 dTHX;
437 UV tv[2];
438
439 u2time (aTHX_ tv);
440 time_real [0] = tv [0];
441 time_real [1] = tv [1] * 1000;
442#endif
443}
444
445ecb_inline void
446coro_times_add (struct coro *c)
447{
448 c->t_real [1] += time_real [1];
449 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
450 c->t_real [0] += time_real [0];
451
452 c->t_cpu [1] += time_cpu [1];
453 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
454 c->t_cpu [0] += time_cpu [0];
455}
456
457ecb_inline void
458coro_times_sub (struct coro *c)
459{
460 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
461 c->t_real [1] -= time_real [1];
462 c->t_real [0] -= time_real [0];
463
464 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
465 c->t_cpu [1] -= time_cpu [1];
466 c->t_cpu [0] -= time_cpu [0];
467}
468
469/*****************************************************************************/
470/* magic glue */
471
472#define CORO_MAGIC_type_cv 26
473#define CORO_MAGIC_type_state PERL_MAGIC_ext
474
475#define CORO_MAGIC_NN(sv, type) \
476 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
477 ? SvMAGIC (sv) \
478 : mg_find (sv, type))
479
480#define CORO_MAGIC(sv, type) \
481 (ecb_expect_true (SvMAGIC (sv)) \
482 ? CORO_MAGIC_NN (sv, type) \
483 : 0)
484
485#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
486#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
487
488ecb_inline MAGIC *
489SvSTATEhv_p (pTHX_ SV *coro)
490{
491 MAGIC *mg;
492
493 if (ecb_expect_true (
494 SvTYPE (coro) == SVt_PVHV
495 && (mg = CORO_MAGIC_state (coro))
496 && mg->mg_virtual == &coro_state_vtbl
497 ))
498 return mg;
499
500 return 0;
501}
502
503ecb_inline struct coro *
504SvSTATE_ (pTHX_ SV *coro)
505{
506 MAGIC *mg;
507
508 if (SvROK (coro))
509 coro = SvRV (coro);
510
511 mg = SvSTATEhv_p (aTHX_ coro);
512 if (!mg)
513 croak ("Coro::State object required");
514
515 return (struct coro *)mg->mg_ptr;
516}
517
518#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
519
520/* faster than SvSTATE, but expects a coroutine hv */
521#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
522#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
523
524/*****************************************************************************/
525/* padlist management and caching */
526
527ecb_inline AV *
159coro_clone_padlist (pTHX_ CV *cv) 528coro_derive_padlist (pTHX_ CV *cv)
160{ 529{
161 AV *padlist = CvPADLIST (cv); 530 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 531 AV *newpadlist, *newpad;
163 532
164 newpadlist = newAV (); 533 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 534 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 535#if PERL_VERSION_ATLEAST (5,10,0)
536 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
537#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 538 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 539#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 540 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 541 --AvFILLp (padlist);
173 542
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 543 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
175 av_store (newpadlist, 1, (SV *)newpad); 544 av_store (newpadlist, 1, (SV *)newpad);
176 545
177 return newpadlist; 546 return newpadlist;
178} 547}
179 548
180static void 549ecb_inline void
181free_padlist (pTHX_ AV *padlist) 550free_padlist (pTHX_ AV *padlist)
182{ 551{
183 /* may be during global destruction */ 552 /* may be during global destruction */
184 if (SvREFCNT (padlist)) 553 if (!IN_DESTRUCT)
185 { 554 {
186 I32 i = AvFILLp (padlist); 555 I32 i = AvFILLp (padlist);
187 while (i >= 0) 556
557 while (i > 0) /* special-case index 0 */
188 { 558 {
189 SV **svp = av_fetch (padlist, i--, FALSE); 559 /* we try to be extra-careful here */
190 if (svp) 560 AV *av = (AV *)AvARRAY (padlist)[i--];
191 { 561 I32 j = AvFILLp (av);
192 SV *sv; 562
193 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 563 while (j >= 0)
564 SvREFCNT_dec (AvARRAY (av)[j--]);
565
566 AvFILLp (av) = -1;
194 SvREFCNT_dec (sv); 567 SvREFCNT_dec (av);
195
196 SvREFCNT_dec (*svp);
197 }
198 } 568 }
199 569
570 SvREFCNT_dec (AvARRAY (padlist)[0]);
571
572 AvFILLp (padlist) = -1;
200 SvREFCNT_dec ((SV*)padlist); 573 SvREFCNT_dec ((SV*)padlist);
201 } 574 }
202} 575}
203 576
204static int 577static int
205coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 578coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
206{ 579{
207 AV *padlist; 580 AV *padlist;
208 AV *av = (AV *)mg->mg_obj; 581 AV *av = (AV *)mg->mg_obj;
582
583 /* perl manages to free our internal AV and _then_ call us */
584 if (IN_DESTRUCT)
585 return 0;
209 586
210 /* casting is fun. */ 587 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 588 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 589 free_padlist (aTHX_ padlist);
213 590
214 SvREFCNT_dec (av); 591 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 592
216 return 0; 593 return 0;
217} 594}
218 595
219#define PERL_MAGIC_coro PERL_MAGIC_ext 596static MGVTBL coro_cv_vtbl = {
220 597 0, 0, 0, 0,
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 598 coro_cv_free
599};
222 600
223/* the next two functions merely cache the padlists */ 601/* the next two functions merely cache the padlists */
224static void 602ecb_inline void
225get_padlist (pTHX_ CV *cv) 603get_padlist (pTHX_ CV *cv)
226{ 604{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
606 AV *av;
228 607
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 608 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 609 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 610 else
232 { 611 {
233#if 0 612#if CORO_PREFER_PERL_FUNCTIONS
234 /* this is probably cleaner, but also slower? */ 613 /* this is probably cleaner? but also slower! */
614 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 615 CV *cp = Perl_cv_clone (aTHX_ cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 616 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 617 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 618 SvREFCNT_dec (cp);
239#else 619#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 620 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
241#endif 621#endif
242 } 622 }
243} 623}
244 624
245static void 625ecb_inline void
246put_padlist (pTHX_ CV *cv) 626put_padlist (pTHX_ CV *cv)
247{ 627{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 628 MAGIC *mg = CORO_MAGIC_cv (cv);
629 AV *av;
249 630
250 if (!mg) 631 if (ecb_expect_false (!mg))
632 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
633
634 av = (AV *)mg->mg_obj;
635
636 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
637 av_extend (av, AvFILLp (av) + 1);
638
639 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
640}
641
642/** load & save, init *******************************************************/
643
644ecb_inline void
645swap_sv (SV *a, SV *b)
646{
647 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
648 SV tmp;
649
650 /* swap sv_any */
651 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
652
653 /* swap sv_flags */
654 SvFLAGS (&tmp) = SvFLAGS (a);
655 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
656 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
657
658#if PERL_VERSION_ATLEAST (5,10,0)
659 /* perl 5.10 and later complicates this _quite_ a bit, but it also
660 * is much faster, so no quarrels here. alternatively, we could
661 * sv_upgrade to avoid this.
662 */
251 { 663 {
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 664 /* swap sv_u */
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 665 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
254 mg->mg_virtual = &vtbl_coro; 666
255 mg->mg_obj = (SV *)newAV (); 667 /* if SvANY points to the head, we need to adjust the pointers,
668 * as the pointer for a still points to b, and maybe vice versa.
669 */
670 #define svany_in_head(type) \
671 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
672
673 if (svany_in_head (SvTYPE (a)))
674 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
675
676 if (svany_in_head (SvTYPE (b)))
677 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
256 } 678 }
257 679#endif
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
259} 680}
260 681
261#define SB do { 682/* swap sv heads, at least logically */
262#define SE } while (0)
263
264#define LOAD(state) load_state(aTHX_ (state));
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
268
269static void 683static void
684swap_svs (pTHX_ Coro__State c)
685{
686 int i;
687
688 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
689 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
690}
691
692#define SWAP_SVS(coro) \
693 if (ecb_expect_false ((coro)->swap_sv)) \
694 swap_svs (aTHX_ (coro))
695
696static void
697on_enterleave_call (pTHX_ SV *cb);
698
699static void
270load_state(pTHX_ Coro__State c) 700load_perl (pTHX_ Coro__State c)
271{ 701{
272 PL_dowarn = c->dowarn; 702 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 703 c->slot = 0;
274 704
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 705 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 706
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 707#if CORO_JIT
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 708 load_perl_slots (slot);
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 709#else
710 #define VARx(name,expr,type) expr = slot->name;
711 #include "state.h"
712#endif
309 713
310 { 714 {
311 dSP; 715 dSP;
716
312 CV *cv; 717 CV *cv;
313 718
314 /* now do the ugly restore mess */ 719 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 720 while (ecb_expect_true (cv = (CV *)POPs))
316 { 721 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 722 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 723 CvDEPTH (cv) = PTR2IV (POPs);
323 } 724 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 725 }
327 726
328 PUTBACK; 727 PUTBACK;
329 } 728 }
330}
331 729
730 slf_frame = c->slf_frame;
731 CORO_THROW = c->except;
732
733 if (ecb_expect_false (enable_times))
734 {
735 if (ecb_expect_false (!times_valid))
736 coro_times_update ();
737
738 coro_times_sub (c);
739 }
740
741 if (ecb_expect_false (c->on_enter))
742 {
743 int i;
744
745 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
746 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
747 }
748
749 SWAP_SVS (c);
750}
751
332static void 752static void
333save_state(pTHX_ Coro__State c, int flags) 753save_perl (pTHX_ Coro__State c)
334{ 754{
755 SWAP_SVS (c);
756
757 if (ecb_expect_false (c->on_leave))
758 {
759 int i;
760
761 for (i = AvFILLp (c->on_leave); i >= 0; --i)
762 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
763 }
764
765 times_valid = 0;
766
767 if (ecb_expect_false (enable_times))
768 {
769 coro_times_update (); times_valid = 1;
770 coro_times_add (c);
771 }
772
773 c->except = CORO_THROW;
774 c->slf_frame = slf_frame;
775
335 { 776 {
336 dSP; 777 dSP;
337 I32 cxix = cxstack_ix; 778 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 779 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo; 780 PERL_SI *top_si = PL_curstackinfo;
… …
341 /* 782 /*
342 * the worst thing you can imagine happens first - we have to save 783 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 784 * (and reinitialize) all cv's in the whole callchain :(
344 */ 785 */
345 786
346 PUSHs (Nullsv); 787 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 788 /* this loop was inspired by pp_caller */
348 for (;;) 789 for (;;)
349 { 790 {
350 while (cxix >= 0) 791 while (ecb_expect_true (cxix >= 0))
351 { 792 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 793 PERL_CONTEXT *cx = &ccstk[cxix--];
353 794
354 if (CxTYPE(cx) == CXt_SUB) 795 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
355 { 796 {
356 CV *cv = cx->blk_sub.cv; 797 CV *cv = cx->blk_sub.cv;
798
357 if (CvDEPTH(cv)) 799 if (ecb_expect_true (CvDEPTH (cv)))
358 { 800 {
359 EXTEND (SP, CvDEPTH(cv)*2); 801 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 802 PUSHs ((SV *)CvPADLIST (cv));
803 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 804 PUSHs ((SV *)cv);
370 805
806 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 807 get_padlist (aTHX_ cv);
372 } 808 }
373 } 809 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 810 }
383 811
384 if (top_si->si_type == PERLSI_MAIN) 812 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 813 break;
386 814
387 top_si = top_si->si_prev; 815 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 816 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 817 cxix = top_si->si_cxix;
390 } 818 }
391 819
392 PUTBACK; 820 PUTBACK;
393 } 821 }
394 822
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 823 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 824 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 825 {
826 unsigned int i;
398 827
399 c->dowarn = PL_dowarn; 828 for (i = 0; i < SLOT_COUNT; ++i)
400 c->in_eval = PL_in_eval; 829 CXINC;
401 830
402 c->curstackinfo = PL_curstackinfo; 831 cxstack_ix -= SLOT_COUNT; /* undo allocation */
403 c->curstack = PL_curstack; 832 }
833
404 c->mainstack = PL_mainstack; 834 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 835
406 c->op = PL_op; 836 {
407 c->curpad = PL_curpad; 837 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 838
409 c->compcv = PL_compcv; 839#if CORO_JIT
410 c->stack_base = PL_stack_base; 840 save_perl_slots (slot);
411 c->stack_max = PL_stack_max; 841#else
412 c->tmps_stack = PL_tmps_stack; 842 #define VARx(name,expr,type) slot->name = expr;
413 c->tmps_floor = PL_tmps_floor; 843 #include "state.h"
414 c->tmps_ix = PL_tmps_ix;
415 c->tmps_max = PL_tmps_max;
416 c->markstack = PL_markstack;
417 c->markstack_ptr = PL_markstack_ptr;
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif 844#endif
430 c->curpm = PL_curpm; 845 }
431 c->curcop = PL_curcop;
432} 846}
433 847
434/* 848/*
435 * allocate various perl stacks. This is an exact copy 849 * allocate various perl stacks. This is almost an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 850 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 851 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 852 * not usually need a lot of stackspace.
439 */ 853 */
854#if CORO_PREFER_PERL_FUNCTIONS
855# define coro_init_stacks(thx) init_stacks ()
856#else
440static void 857static void
441coro_init_stacks (pTHX) 858coro_init_stacks (pTHX)
442{ 859{
443 LOCK; 860 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 861 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 862 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 863 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 864
450 PL_stack_base = AvARRAY(PL_curstack); 865 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 866 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 867 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 868
454 New(50,PL_tmps_stack,96,SV*); 869 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 870 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 871 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 872 PL_tmps_max = 32;
458 873
459 New(54,PL_markstack,16,I32); 874 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 875 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 876 PL_markstack_max = PL_markstack + 16;
462 877
463#ifdef SET_MARK_OFFSET 878#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 879 SET_MARK_OFFSET;
465#endif 880#endif
466 881
467 New(54,PL_scopestack,16,I32); 882 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 883 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 884 PL_scopestack_max = 8;
885#if HAS_SCOPESTACK_NAME
886 New(54,PL_scopestack_name,8,const char*);
887#endif
470 888
471 New(54,PL_savestack,96,ANY); 889 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 890 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 891 PL_savestack_max = 24;
474 892
475#if PERL_VERSION < 9 893#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 894 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 895 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 896 PL_retstack_max = 4;
479#endif 897#endif
480
481 UNLOCK;
482} 898}
899#endif
483 900
484/* 901/*
485 * destroy the stacks, the callchain etc... 902 * destroy the stacks, the callchain etc...
486 */ 903 */
487static void 904static void
488destroy_stacks(pTHX) 905coro_destruct_stacks (pTHX)
489{ 906{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 907 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 908 PL_curstackinfo = PL_curstackinfo->si_next;
503 909
504 while (PL_curstackinfo) 910 while (PL_curstackinfo)
505 { 911 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 912 PERL_SI *p = PL_curstackinfo->si_prev;
507 913
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 914 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 915 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 916
520 Safefree (PL_curstackinfo->si_cxstack); 917 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 918 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 919 PL_curstackinfo = p;
523 } 920 }
524 921
525 Safefree (PL_tmps_stack); 922 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 923 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 924 Safefree (PL_scopestack);
925#if HAS_SCOPESTACK_NAME
926 Safefree (PL_scopestack_name);
927#endif
528 Safefree (PL_savestack); 928 Safefree (PL_savestack);
529#if PERL_VERSION < 9 929#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 930 Safefree (PL_retstack);
531#endif 931#endif
532} 932}
533 933
934#define CORO_RSS \
935 rss += sizeof (SYM (curstackinfo)); \
936 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
937 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
938 rss += SYM (tmps_max) * sizeof (SV *); \
939 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
940 rss += SYM (scopestack_max) * sizeof (I32); \
941 rss += SYM (savestack_max) * sizeof (ANY);
942
943static size_t
944coro_rss (pTHX_ struct coro *coro)
945{
946 size_t rss = sizeof (*coro);
947
948 if (coro->mainstack)
949 {
950 if (coro->flags & CF_RUNNING)
951 {
952 #define SYM(sym) PL_ ## sym
953 CORO_RSS;
954 #undef SYM
955 }
956 else
957 {
958 #define SYM(sym) coro->slot->sym
959 CORO_RSS;
960 #undef SYM
961 }
962 }
963
964 return rss;
965}
966
967/** coroutine stack handling ************************************************/
968
969static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
970static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
971static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
972
973/* apparently < 5.8.8 */
974#ifndef MgPV_nolen_const
975#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
976 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
977 (const char*)(mg)->mg_ptr)
978#endif
979
980/*
981 * This overrides the default magic get method of %SIG elements.
982 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
983 * and instead of trying to save and restore the hash elements (extremely slow),
984 * we just provide our own readback here.
985 */
986static int ecb_cold
987coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
988{
989 const char *s = MgPV_nolen_const (mg);
990
991 if (*s == '_')
992 {
993 SV **svp = 0;
994
995 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
996 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
997
998 if (svp)
999 {
1000 SV *ssv;
1001
1002 if (!*svp)
1003 ssv = &PL_sv_undef;
1004 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1005 ssv = sv_2mortal (newRV_inc (*svp));
1006 else
1007 ssv = *svp;
1008
1009 sv_setsv (sv, ssv);
1010 return 0;
1011 }
1012 }
1013
1014 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1015}
1016
1017static int ecb_cold
1018coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1019{
1020 const char *s = MgPV_nolen_const (mg);
1021
1022 if (*s == '_')
1023 {
1024 SV **svp = 0;
1025
1026 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1027 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1028
1029 if (svp)
1030 {
1031 SV *old = *svp;
1032 *svp = 0;
1033 SvREFCNT_dec (old);
1034 return 0;
1035 }
1036 }
1037
1038 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1039}
1040
1041static int ecb_cold
1042coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1043{
1044 const char *s = MgPV_nolen_const (mg);
1045
1046 if (*s == '_')
1047 {
1048 SV **svp = 0;
1049
1050 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1051 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1052
1053 if (svp)
1054 {
1055 SV *old = *svp;
1056 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1057 SvREFCNT_dec (old);
1058 return 0;
1059 }
1060 }
1061
1062 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1063}
1064
1065static void
1066prepare_nop (pTHX_ struct coro_transfer_args *ta)
1067{
1068 /* kind of mega-hacky, but works */
1069 ta->next = ta->prev = (struct coro *)ta;
1070}
1071
534static void 1072static int
535setup_coro (struct coro *coro) 1073slf_check_nop (pTHX_ struct CoroSLF *frame)
1074{
1075 return 0;
1076}
1077
1078static int
1079slf_check_repeat (pTHX_ struct CoroSLF *frame)
1080{
1081 return 1;
1082}
1083
1084static UNOP init_perl_op;
1085
1086ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1087init_perl (pTHX_ struct coro *coro)
536{ 1088{
537 /* 1089 /*
538 * emulate part of the perl startup here. 1090 * emulate part of the perl startup here.
539 */ 1091 */
1092 coro_init_stacks (aTHX);
1093
1094 PL_runops = RUNOPS_DEFAULT;
1095 PL_curcop = &PL_compiling;
1096 PL_in_eval = EVAL_NULL;
1097 PL_comppad = 0;
1098 PL_comppad_name = 0;
1099 PL_comppad_name_fill = 0;
1100 PL_comppad_name_floor = 0;
1101 PL_curpm = 0;
1102 PL_curpad = 0;
1103 PL_localizing = 0;
1104 PL_restartop = 0;
1105#if PERL_VERSION_ATLEAST (5,10,0)
1106 PL_parser = 0;
1107#endif
1108 PL_hints = 0;
1109
1110 /* recreate the die/warn hooks */
1111 PL_diehook = SvREFCNT_inc (rv_diehook);
1112 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1113
1114 GvSV (PL_defgv) = newSV (0);
1115 GvAV (PL_defgv) = coro->args; coro->args = 0;
1116 GvSV (PL_errgv) = newSV (0);
1117 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1118 GvHV (PL_hintgv) = 0;
1119 PL_rs = newSVsv (GvSV (irsgv));
1120 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1121
1122 {
1123 dSP;
1124 UNOP myop;
1125
1126 Zero (&myop, 1, UNOP);
1127 myop.op_next = Nullop;
1128 myop.op_type = OP_ENTERSUB;
1129 myop.op_flags = OPf_WANT_VOID;
1130
1131 PUSHMARK (SP);
1132 PUSHs ((SV *)coro->startcv);
1133 PUTBACK;
1134 PL_op = (OP *)&myop;
1135 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1136 }
1137
1138 /* this newly created coroutine might be run on an existing cctx which most
1139 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1140 */
1141 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1142 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1143 slf_frame.destroy = 0;
1144
1145 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1146 init_perl_op.op_next = PL_op;
1147 init_perl_op.op_type = OP_ENTERSUB;
1148 init_perl_op.op_ppaddr = pp_slf;
1149 /* no flags etc. required, as an init function won't be called */
1150
1151 PL_op = (OP *)&init_perl_op;
1152
1153 /* copy throw, in case it was set before init_perl */
1154 CORO_THROW = coro->except;
1155
1156 SWAP_SVS (coro);
1157
1158 if (ecb_expect_false (enable_times))
1159 {
1160 coro_times_update ();
1161 coro_times_sub (coro);
1162 }
1163}
1164
1165static void
1166coro_unwind_stacks (pTHX)
1167{
1168 if (!IN_DESTRUCT)
1169 {
1170 /* restore all saved variables and stuff */
1171 LEAVE_SCOPE (0);
1172 assert (PL_tmps_floor == -1);
1173
1174 /* free all temporaries */
1175 FREETMPS;
1176 assert (PL_tmps_ix == -1);
1177
1178 /* unwind all extra stacks */
1179 POPSTACK_TO (PL_mainstack);
1180
1181 /* unwind main stack */
1182 dounwind (-1);
1183 }
1184}
1185
1186static void
1187destroy_perl (pTHX_ struct coro *coro)
1188{
1189 SV *svf [9];
1190
1191 {
1192 SV *old_current = SvRV (coro_current);
1193 struct coro *current = SvSTATE (old_current);
1194
1195 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1196
1197 save_perl (aTHX_ current);
1198
1199 /* this will cause transfer_check to croak on block*/
1200 SvRV_set (coro_current, (SV *)coro->hv);
1201
1202 load_perl (aTHX_ coro);
1203
1204 coro_unwind_stacks (aTHX);
1205
1206 /* restore swapped sv's */
1207 SWAP_SVS (coro);
1208
1209 coro_destruct_stacks (aTHX);
1210
1211 /* now save some sv's to be free'd later */
1212 svf [0] = GvSV (PL_defgv);
1213 svf [1] = (SV *)GvAV (PL_defgv);
1214 svf [2] = GvSV (PL_errgv);
1215 svf [3] = (SV *)PL_defoutgv;
1216 svf [4] = PL_rs;
1217 svf [5] = GvSV (irsgv);
1218 svf [6] = (SV *)GvHV (PL_hintgv);
1219 svf [7] = PL_diehook;
1220 svf [8] = PL_warnhook;
1221 assert (9 == sizeof (svf) / sizeof (*svf));
1222
1223 SvRV_set (coro_current, old_current);
1224
1225 load_perl (aTHX_ current);
1226 }
1227
1228 {
1229 unsigned int i;
1230
1231 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1232 SvREFCNT_dec (svf [i]);
1233
1234 SvREFCNT_dec (coro->saved_deffh);
1235 SvREFCNT_dec (coro->rouse_cb);
1236 SvREFCNT_dec (coro->invoke_cb);
1237 SvREFCNT_dec (coro->invoke_av);
1238 }
1239}
1240
1241ecb_inline void
1242free_coro_mortal (pTHX)
1243{
1244 if (ecb_expect_true (coro_mortal))
1245 {
1246 SvREFCNT_dec ((SV *)coro_mortal);
1247 coro_mortal = 0;
1248 }
1249}
1250
1251static int
1252runops_trace (pTHX)
1253{
1254 COP *oldcop = 0;
1255 int oldcxix = -2;
1256
1257 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1258 {
1259 PERL_ASYNC_CHECK ();
1260
1261 if (cctx_current->flags & CC_TRACE_ALL)
1262 {
1263 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1264 {
1265 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1266 SV **bot, **top;
1267 AV *av = newAV (); /* return values */
1268 SV **cb;
1269 dSP;
1270
1271 GV *gv = CvGV (cx->blk_sub.cv);
1272 SV *fullname = sv_2mortal (newSV (0));
1273 if (isGV (gv))
1274 gv_efullname3 (fullname, gv, 0);
1275
1276 bot = PL_stack_base + cx->blk_oldsp + 1;
1277 top = cx->blk_gimme == G_ARRAY ? SP + 1
1278 : cx->blk_gimme == G_SCALAR ? bot + 1
1279 : bot;
1280
1281 av_extend (av, top - bot);
1282 while (bot < top)
1283 av_push (av, SvREFCNT_inc_NN (*bot++));
1284
1285 PL_runops = RUNOPS_DEFAULT;
1286 ENTER;
1287 SAVETMPS;
1288 EXTEND (SP, 3);
1289 PUSHMARK (SP);
1290 PUSHs (&PL_sv_no);
1291 PUSHs (fullname);
1292 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1293 PUTBACK;
1294 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1295 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1296 SPAGAIN;
1297 FREETMPS;
1298 LEAVE;
1299 PL_runops = runops_trace;
1300 }
1301
1302 if (oldcop != PL_curcop)
1303 {
1304 oldcop = PL_curcop;
1305
1306 if (PL_curcop != &PL_compiling)
1307 {
1308 SV **cb;
1309
1310 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1311 {
1312 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1313
1314 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1315 {
1316 dSP;
1317 GV *gv = CvGV (cx->blk_sub.cv);
1318 SV *fullname = sv_2mortal (newSV (0));
1319
1320 if (isGV (gv))
1321 gv_efullname3 (fullname, gv, 0);
1322
1323 PL_runops = RUNOPS_DEFAULT;
1324 ENTER;
1325 SAVETMPS;
1326 EXTEND (SP, 3);
1327 PUSHMARK (SP);
1328 PUSHs (&PL_sv_yes);
1329 PUSHs (fullname);
1330 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1331 PUTBACK;
1332 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1333 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1334 SPAGAIN;
1335 FREETMPS;
1336 LEAVE;
1337 PL_runops = runops_trace;
1338 }
1339
1340 oldcxix = cxstack_ix;
1341 }
1342
1343 if (cctx_current->flags & CC_TRACE_LINE)
1344 {
1345 dSP;
1346
1347 PL_runops = RUNOPS_DEFAULT;
1348 ENTER;
1349 SAVETMPS;
1350 EXTEND (SP, 3);
1351 PL_runops = RUNOPS_DEFAULT;
1352 PUSHMARK (SP);
1353 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1354 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1355 PUTBACK;
1356 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1357 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1358 SPAGAIN;
1359 FREETMPS;
1360 LEAVE;
1361 PL_runops = runops_trace;
1362 }
1363 }
1364 }
1365 }
1366 }
1367
1368 TAINT_NOT;
1369 return 0;
1370}
1371
1372static struct CoroSLF cctx_ssl_frame;
1373
1374static void
1375slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1376{
1377 ta->prev = 0;
1378}
1379
1380static int
1381slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1382{
1383 *frame = cctx_ssl_frame;
1384
1385 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1386}
1387
1388/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1389static void ecb_noinline
1390cctx_prepare (pTHX)
1391{
1392 PL_top_env = &PL_start_env;
1393
1394 if (cctx_current->flags & CC_TRACE)
1395 PL_runops = runops_trace;
1396
1397 /* we already must be executing an SLF op, there is no other valid way
1398 * that can lead to creation of a new cctx */
1399 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1400 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1401
1402 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1403 cctx_ssl_frame = slf_frame;
1404
1405 slf_frame.prepare = slf_prepare_set_stacklevel;
1406 slf_frame.check = slf_check_set_stacklevel;
1407}
1408
1409/* the tail of transfer: execute stuff we can only do after a transfer */
1410ecb_inline void
1411transfer_tail (pTHX)
1412{
1413 free_coro_mortal (aTHX);
1414}
1415
1416/* try to exit the same way perl's main function would do */
1417/* we do not bother resetting the environment or other things *7
1418/* that are not, uhm, essential */
1419/* this obviously also doesn't work when perl is embedded */
1420static void ecb_noinline ecb_cold
1421perlish_exit (pTHX)
1422{
1423 int exitstatus = perl_destruct (PL_curinterp);
1424 perl_free (PL_curinterp);
1425 exit (exitstatus);
1426}
1427
1428/*
1429 * this is a _very_ stripped down perl interpreter ;)
1430 */
1431static void
1432cctx_run (void *arg)
1433{
1434#ifdef USE_ITHREADS
1435# if CORO_PTHREAD
1436 PERL_SET_CONTEXT (coro_thx);
1437# endif
1438#endif
1439 {
1440 dTHX;
1441
1442 /* normally we would need to skip the entersub here */
1443 /* not doing so will re-execute it, which is exactly what we want */
1444 /* PL_nop = PL_nop->op_next */
1445
1446 /* inject a fake subroutine call to cctx_init */
1447 cctx_prepare (aTHX);
1448
1449 /* cctx_run is the alternative tail of transfer() */
1450 transfer_tail (aTHX);
1451
1452 /* somebody or something will hit me for both perl_run and PL_restartop */
1453 PL_restartop = PL_op;
1454 perl_run (PL_curinterp);
1455 /*
1456 * Unfortunately, there is no way to get at the return values of the
1457 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1458 * runtime errors here, as this is just a random interpreter, not a thread.
1459 */
1460
1461 /*
1462 * If perl-run returns we assume exit() was being called or the coro
1463 * fell off the end, which seems to be the only valid (non-bug)
1464 * reason for perl_run to return. We try to mimic whatever perl is normally
1465 * doing in that case. YMMV.
1466 */
1467 perlish_exit (aTHX);
1468 }
1469}
1470
1471static coro_cctx *
1472cctx_new (void)
1473{
1474 coro_cctx *cctx;
1475
1476 ++cctx_count;
1477 New (0, cctx, 1, coro_cctx);
1478
1479 cctx->gen = cctx_gen;
1480 cctx->flags = 0;
1481 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1482
1483 return cctx;
1484}
1485
1486/* create a new cctx only suitable as source */
1487static coro_cctx *
1488cctx_new_empty (void)
1489{
1490 coro_cctx *cctx = cctx_new ();
1491
1492 cctx->sptr = 0;
1493 coro_create (&cctx->cctx, 0, 0, 0, 0);
1494
1495 return cctx;
1496}
1497
1498/* create a new cctx suitable as destination/running a perl interpreter */
1499static coro_cctx *
1500cctx_new_run (void)
1501{
1502 coro_cctx *cctx = cctx_new ();
1503 void *stack_start;
1504 size_t stack_size;
1505
1506#if HAVE_MMAP
1507 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1508 /* mmap supposedly does allocate-on-write for us */
1509 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, -1, 0);
1510
1511 if (cctx->sptr != (void *)-1)
1512 {
1513 #if CORO_STACKGUARD
1514 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1515 #endif
1516 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1517 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1518 cctx->flags |= CC_MAPPED;
1519 }
1520 else
1521#endif
1522 {
1523 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1524 New (0, cctx->sptr, cctx_stacksize, long);
1525
1526 if (!cctx->sptr)
1527 {
1528 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1529 _exit (EXIT_FAILURE);
1530 }
1531
1532 stack_start = cctx->sptr;
1533 stack_size = cctx->ssize;
1534 }
1535
1536 #if CORO_USE_VALGRIND
1537 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1538 #endif
1539
1540 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1541
1542 return cctx;
1543}
1544
1545static void
1546cctx_destroy (coro_cctx *cctx)
1547{
1548 if (!cctx)
1549 return;
1550
1551 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1552
1553 --cctx_count;
1554 coro_destroy (&cctx->cctx);
1555
1556 /* coro_transfer creates new, empty cctx's */
1557 if (cctx->sptr)
1558 {
1559 #if CORO_USE_VALGRIND
1560 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1561 #endif
1562
1563#if HAVE_MMAP
1564 if (cctx->flags & CC_MAPPED)
1565 munmap (cctx->sptr, cctx->ssize);
1566 else
1567#endif
1568 Safefree (cctx->sptr);
1569 }
1570
1571 Safefree (cctx);
1572}
1573
1574/* wether this cctx should be destructed */
1575#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1576
1577static coro_cctx *
1578cctx_get (pTHX)
1579{
1580 while (ecb_expect_true (cctx_first))
1581 {
1582 coro_cctx *cctx = cctx_first;
1583 cctx_first = cctx->next;
1584 --cctx_idle;
1585
1586 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1587 return cctx;
1588
1589 cctx_destroy (cctx);
1590 }
1591
1592 return cctx_new_run ();
1593}
1594
1595static void
1596cctx_put (coro_cctx *cctx)
1597{
1598 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1599
1600 /* free another cctx if overlimit */
1601 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1602 {
1603 coro_cctx *first = cctx_first;
1604 cctx_first = first->next;
1605 --cctx_idle;
1606
1607 cctx_destroy (first);
1608 }
1609
1610 ++cctx_idle;
1611 cctx->next = cctx_first;
1612 cctx_first = cctx;
1613}
1614
1615/** coroutine switching *****************************************************/
1616
1617static void
1618transfer_check (pTHX_ struct coro *prev, struct coro *next)
1619{
1620 /* TODO: throwing up here is considered harmful */
1621
1622 if (ecb_expect_true (prev != next))
1623 {
1624 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1625 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1626
1627 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1628 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1629
1630#if !PERL_VERSION_ATLEAST (5,10,0)
1631 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1632 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1633#endif
1634 }
1635}
1636
1637/* always use the TRANSFER macro */
1638static void ecb_noinline /* noinline so we have a fixed stackframe */
1639transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1640{
1641 dSTACKLEVEL;
1642
1643 /* sometimes transfer is only called to set idle_sp */
1644 if (ecb_expect_false (!prev))
1645 {
1646 cctx_current->idle_sp = STACKLEVEL;
1647 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1648 }
1649 else if (ecb_expect_true (prev != next))
1650 {
1651 coro_cctx *cctx_prev;
1652
1653 if (ecb_expect_false (prev->flags & CF_NEW))
1654 {
1655 /* create a new empty/source context */
1656 prev->flags &= ~CF_NEW;
1657 prev->flags |= CF_RUNNING;
1658 }
1659
1660 prev->flags &= ~CF_RUNNING;
1661 next->flags |= CF_RUNNING;
1662
1663 /* first get rid of the old state */
1664 save_perl (aTHX_ prev);
1665
1666 if (ecb_expect_false (next->flags & CF_NEW))
1667 {
1668 /* need to start coroutine */
1669 next->flags &= ~CF_NEW;
1670 /* setup coroutine call */
1671 init_perl (aTHX_ next);
1672 }
1673 else
1674 load_perl (aTHX_ next);
1675
1676 /* possibly untie and reuse the cctx */
1677 if (ecb_expect_true (
1678 cctx_current->idle_sp == STACKLEVEL
1679 && !(cctx_current->flags & CC_TRACE)
1680 && !force_cctx
1681 ))
1682 {
1683 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1684 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1685
1686 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1687 /* without this the next cctx_get might destroy the running cctx while still in use */
1688 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1689 if (ecb_expect_true (!next->cctx))
1690 next->cctx = cctx_get (aTHX);
1691
1692 cctx_put (cctx_current);
1693 }
1694 else
1695 prev->cctx = cctx_current;
1696
1697 ++next->usecount;
1698
1699 cctx_prev = cctx_current;
1700 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1701
1702 next->cctx = 0;
1703
1704 if (ecb_expect_false (cctx_prev != cctx_current))
1705 {
1706 cctx_prev->top_env = PL_top_env;
1707 PL_top_env = cctx_current->top_env;
1708 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1709 }
1710
1711 transfer_tail (aTHX);
1712 }
1713}
1714
1715#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1716#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1717
1718/** high level stuff ********************************************************/
1719
1720/* this function is actually Coro, not Coro::State, but we call it from here */
1721/* because it is convenient - but it hasn't been declared yet for that reason */
1722static void
1723coro_call_on_destroy (pTHX_ struct coro *coro);
1724
1725static void
1726coro_state_destroy (pTHX_ struct coro *coro)
1727{
1728 if (coro->flags & CF_ZOMBIE)
1729 return;
1730
1731 slf_destroy (aTHX_ coro);
1732
1733 coro->flags |= CF_ZOMBIE;
1734
1735 if (coro->flags & CF_READY)
1736 {
1737 /* reduce nready, as destroying a ready coro effectively unreadies it */
1738 /* alternative: look through all ready queues and remove the coro */
1739 --coro_nready;
1740 }
1741 else
1742 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1743
1744 if (coro->next) coro->next->prev = coro->prev;
1745 if (coro->prev) coro->prev->next = coro->next;
1746 if (coro == coro_first) coro_first = coro->next;
1747
1748 if (coro->mainstack
1749 && coro->mainstack != main_mainstack
1750 && coro->slot
1751 && !PL_dirty)
1752 destroy_perl (aTHX_ coro);
1753
1754 cctx_destroy (coro->cctx);
1755 SvREFCNT_dec (coro->startcv);
1756 SvREFCNT_dec (coro->args);
1757 SvREFCNT_dec (coro->swap_sv);
1758 SvREFCNT_dec (CORO_THROW);
1759
1760 coro_call_on_destroy (aTHX_ coro);
1761
1762 /* more destruction mayhem in coro_state_free */
1763}
1764
1765static int
1766coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1767{
1768 struct coro *coro = (struct coro *)mg->mg_ptr;
1769 mg->mg_ptr = 0;
1770
1771 coro_state_destroy (aTHX_ coro);
1772 SvREFCNT_dec (coro->on_destroy);
1773 SvREFCNT_dec (coro->status);
1774
1775 Safefree (coro);
1776
1777 return 0;
1778}
1779
1780static int ecb_cold
1781coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1782{
1783 /* called when perl clones the current process the slow way (windows process emulation) */
1784 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1785 mg->mg_ptr = 0;
1786 mg->mg_virtual = 0;
1787
1788 return 0;
1789}
1790
1791static MGVTBL coro_state_vtbl = {
1792 0, 0, 0, 0,
1793 coro_state_free,
1794 0,
1795#ifdef MGf_DUP
1796 coro_state_dup,
1797#else
1798# define MGf_DUP 0
1799#endif
1800};
1801
1802static void
1803prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1804{
1805 ta->prev = SvSTATE (prev_sv);
1806 ta->next = SvSTATE (next_sv);
1807 TRANSFER_CHECK (*ta);
1808}
1809
1810static void
1811api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1812{
1813 struct coro_transfer_args ta;
1814
1815 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1816 TRANSFER (ta, 1);
1817}
1818
1819/** Coro ********************************************************************/
1820
1821ecb_inline void
1822coro_enq (pTHX_ struct coro *coro)
1823{
1824 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1825
1826 SvREFCNT_inc_NN (coro->hv);
1827
1828 coro->next_ready = 0;
1829 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1830 ready [1] = coro;
1831}
1832
1833ecb_inline struct coro *
1834coro_deq (pTHX)
1835{
1836 int prio;
1837
1838 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1839 {
1840 struct coro **ready = coro_ready [prio];
1841
1842 if (ready [0])
1843 {
1844 struct coro *coro = ready [0];
1845 ready [0] = coro->next_ready;
1846 return coro;
1847 }
1848 }
1849
1850 return 0;
1851}
1852
1853static void
1854invoke_sv_ready_hook_helper (void)
1855{
540 dTHX; 1856 dTHX;
541 dSP; 1857 dSP;
542 UNOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544 1858
545 coro_init_stacks (aTHX); 1859 ENTER;
546 /*PL_curcop = 0;*/ 1860 SAVETMPS;
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */
548 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0;
550 1861
551 SPAGAIN;
552
553 Zero (&myop, 1, UNOP);
554 myop.op_next = Nullop;
555 myop.op_flags = OPf_WANT_VOID;
556
557 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP); 1862 PUSHMARK (SP);
560 XPUSHs (sub_init);
561 PUTBACK; 1863 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1864 call_sv (coro_readyhook, G_VOID | G_DISCARD);
563 SPAGAIN;
564 1865
565 ENTER; /* necessary e.g. for dounwind */ 1866 FREETMPS;
1867 LEAVE;
566} 1868}
567 1869
568static void 1870static int
569free_coro_mortal () 1871api_ready (pTHX_ SV *coro_sv)
570{ 1872{
571 if (coro_mortal) 1873 struct coro *coro = SvSTATE (coro_sv);
572 {
573 dTHX;
574 1874
575 SvREFCNT_dec (coro_mortal); 1875 if (coro->flags & CF_READY)
576 coro_mortal = 0;
577 }
578}
579
580static void
581coro_run (void *arg)
582{
583 /*
584 * this is a _very_ stripped down perl interpreter ;)
585 */
586 dTHX;
587 int ret;
588
589 UNLOCK;
590
591 PL_top_env = &PL_start_env;
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
596 /* continue at cctx_init, without entersub */
597 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599 /* somebody will hit me for both perl_run and PL_restartop */
600 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601 printf ("ret %d\n", ret);//D
602
603 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613
614#if HAVE_MMAP
615
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
617 /* mmap suppsedly does allocate-on-write for us */
618 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619
620 if (stack->sptr == (void *)-1)
621 {
622 perror ("FATAL: unable to mmap stack for coroutine");
623 _exit (EXIT_FAILURE);
624 }
625
626# if STACKGUARD
627 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
628# endif
629
630#else
631
632 stack->ssize = STACKSIZE * (long)sizeof (long);
633 New (0, stack->sptr, STACKSIZE, long);
634
635 if (!stack->sptr)
636 {
637 perror (stderr, "FATAL: unable to malloc stack for coroutine");
638 _exit (EXIT_FAILURE);
639 }
640
641#endif
642
643 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
644
645 return stack;
646}
647
648static void
649stack_free (coro_stack *stack)
650{
651 if (!stack)
652 return; 1876 return 0;
653 1877
654#if HAVE_MMAP 1878 coro->flags |= CF_READY;
655 munmap (stack->sptr, stack->ssize);
656#else
657 Safefree (stack->sptr);
658#endif
659 1879
660 Safefree (stack); 1880 coro_enq (aTHX_ coro);
661}
662 1881
663static coro_stack *stack_first; 1882 if (!coro_nready++)
1883 if (coroapi.readyhook)
1884 coroapi.readyhook ();
664 1885
665static coro_stack * 1886 return 1;
666stack_get () 1887}
667{
668 coro_stack *stack;
669 1888
670 if (stack_first) 1889static int
671 { 1890api_is_ready (pTHX_ SV *coro_sv)
672 stack = stack_first; 1891{
673 stack_first = stack->next; 1892 return !!(SvSTATE (coro_sv)->flags & CF_READY);
674 } 1893}
675 else 1894
1895/* expects to own a reference to next->hv */
1896ecb_inline void
1897prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1898{
1899 SV *prev_sv = SvRV (coro_current);
1900
1901 ta->prev = SvSTATE_hv (prev_sv);
1902 ta->next = next;
1903
1904 TRANSFER_CHECK (*ta);
1905
1906 SvRV_set (coro_current, (SV *)next->hv);
1907
1908 free_coro_mortal (aTHX);
1909 coro_mortal = prev_sv;
1910}
1911
1912static void
1913prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1914{
1915 for (;;)
676 { 1916 {
677 stack = stack_new (); 1917 struct coro *next = coro_deq (aTHX);
678 PL_op = PL_op->op_next;
679 }
680 1918
681 return stack; 1919 if (ecb_expect_true (next))
682}
683
684static void
685stack_put (coro_stack *stack)
686{
687 stack->next = stack_first;
688 stack_first = stack;
689}
690
691/* never call directly, always through the coro_state_transfer global variable */
692static void
693transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
694{
695 dSTACKLEVEL;
696
697 /* sometimes transfer is only called to set idle_sp */
698 if (flags == TRANSFER_SET_STACKLEVEL)
699 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
700 else if (prev != next)
701 {
702 coro_stack *prev__stack;
703
704 LOCK;
705
706 if (next->mainstack)
707 { 1920 {
708 /* coroutine already started */ 1921 /* cannot transfer to destroyed coros, skip and look for next */
709 SAVE (prev, flags); 1922 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
710 LOAD (next); 1923 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1924 else
1925 {
1926 next->flags &= ~CF_READY;
1927 --coro_nready;
1928
1929 prepare_schedule_to (aTHX_ ta, next);
1930 break;
1931 }
711 } 1932 }
712 else 1933 else
713 { 1934 {
714 /* need to start coroutine */ 1935 /* nothing to schedule: call the idle handler */
715 /* first get rid of the old state */ 1936 if (SvROK (sv_idle)
716 SAVE (prev, -1); 1937 && SvOBJECT (SvRV (sv_idle)))
717 /* setup coroutine call */ 1938 {
718 setup_coro (next); 1939 if (SvRV (sv_idle) == SvRV (coro_current))
719 /* need a stack */ 1940 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
720 next->stack = 0; 1941
1942 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1943 api_ready (aTHX_ SvRV (sv_idle));
1944 --coro_nready;
1945 }
1946 else
1947 {
1948 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1949 dSP;
1950
1951 ENTER;
1952 SAVETMPS;
1953
1954 PUSHMARK (SP);
1955 PUTBACK;
1956 call_sv (sv_idle, G_VOID | G_DISCARD);
1957
1958 FREETMPS;
1959 LEAVE;
1960 }
721 } 1961 }
1962 }
1963}
722 1964
723 if (!prev->stack) 1965ecb_inline void
724 /* create a new empty context */ 1966prepare_cede (pTHX_ struct coro_transfer_args *ta)
725 Newz (0, prev->stack, 1, coro_stack); 1967{
1968 api_ready (aTHX_ coro_current);
1969 prepare_schedule (aTHX_ ta);
1970}
726 1971
727 prev__stack = prev->stack; 1972ecb_inline void
1973prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1974{
1975 SV *prev = SvRV (coro_current);
728 1976
729 /* possibly "free" the stack */ 1977 if (coro_nready)
730 if (prev__stack->idle_sp == STACKLEVEL) 1978 {
1979 prepare_schedule (aTHX_ ta);
1980 api_ready (aTHX_ prev);
1981 }
1982 else
1983 prepare_nop (aTHX_ ta);
1984}
1985
1986static void
1987api_schedule (pTHX)
1988{
1989 struct coro_transfer_args ta;
1990
1991 prepare_schedule (aTHX_ &ta);
1992 TRANSFER (ta, 1);
1993}
1994
1995static void
1996api_schedule_to (pTHX_ SV *coro_sv)
1997{
1998 struct coro_transfer_args ta;
1999 struct coro *next = SvSTATE (coro_sv);
2000
2001 SvREFCNT_inc_NN (coro_sv);
2002 prepare_schedule_to (aTHX_ &ta, next);
2003}
2004
2005static int
2006api_cede (pTHX)
2007{
2008 struct coro_transfer_args ta;
2009
2010 prepare_cede (aTHX_ &ta);
2011
2012 if (ecb_expect_true (ta.prev != ta.next))
2013 {
2014 TRANSFER (ta, 1);
2015 return 1;
2016 }
2017 else
2018 return 0;
2019}
2020
2021static int
2022api_cede_notself (pTHX)
2023{
2024 if (coro_nready)
2025 {
2026 struct coro_transfer_args ta;
2027
2028 prepare_cede_notself (aTHX_ &ta);
2029 TRANSFER (ta, 1);
2030 return 1;
2031 }
2032 else
2033 return 0;
2034}
2035
2036static void
2037api_trace (pTHX_ SV *coro_sv, int flags)
2038{
2039 struct coro *coro = SvSTATE (coro_sv);
2040
2041 if (coro->flags & CF_RUNNING)
2042 croak ("cannot enable tracing on a running coroutine, caught");
2043
2044 if (flags & CC_TRACE)
2045 {
2046 if (!coro->cctx)
2047 coro->cctx = cctx_new_run ();
2048 else if (!(coro->cctx->flags & CC_TRACE))
2049 croak ("cannot enable tracing on coroutine with custom stack, caught");
2050
2051 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2052 }
2053 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2054 {
2055 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2056
2057 if (coro->flags & CF_RUNNING)
2058 PL_runops = RUNOPS_DEFAULT;
2059 else
2060 coro->slot->runops = RUNOPS_DEFAULT;
2061 }
2062}
2063
2064static void
2065coro_push_av (pTHX_ AV *av, I32 gimme_v)
2066{
2067 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2068 {
2069 dSP;
2070
2071 if (gimme_v == G_SCALAR)
2072 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2073 else
731 { 2074 {
732 stack_put (prev__stack); 2075 int i;
733 prev->stack = 0; 2076 EXTEND (SP, AvFILLp (av) + 1);
2077
2078 for (i = 0; i <= AvFILLp (av); ++i)
2079 PUSHs (AvARRAY (av)[i]);
734 } 2080 }
735 2081
736 if (!next->stack) 2082 PUTBACK;
737 next->stack = stack_get (); 2083 }
2084}
738 2085
739 if (prev__stack != next->stack) 2086static void
2087coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2088{
2089 if (!coro->on_destroy)
2090 coro->on_destroy = newAV ();
2091
2092 av_push (coro->on_destroy, cb);
2093}
2094
2095static void
2096slf_destroy_join (pTHX_ struct CoroSLF *frame)
2097{
2098 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2099}
2100
2101static int
2102slf_check_join (pTHX_ struct CoroSLF *frame)
2103{
2104 struct coro *coro = (struct coro *)frame->data;
2105
2106 if (!coro->status)
2107 return 1;
2108
2109 frame->destroy = 0;
2110
2111 coro_push_av (aTHX_ coro->status, GIMME_V);
2112
2113 SvREFCNT_dec ((SV *)coro->hv);
2114
2115 return 0;
2116}
2117
2118static void
2119slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2120{
2121 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2122
2123 if (items > 1)
2124 croak ("join called with too many arguments");
2125
2126 if (coro->status)
2127 frame->prepare = prepare_nop;
2128 else
2129 {
2130 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2131 frame->prepare = prepare_schedule;
2132 }
2133
2134 frame->check = slf_check_join;
2135 frame->destroy = slf_destroy_join;
2136 frame->data = (void *)coro;
2137 SvREFCNT_inc (coro->hv);
2138}
2139
2140static void
2141coro_call_on_destroy (pTHX_ struct coro *coro)
2142{
2143 AV *od = coro->on_destroy;
2144
2145 if (!od)
2146 return;
2147
2148 while (AvFILLp (od) >= 0)
2149 {
2150 SV *cb = sv_2mortal (av_pop (od));
2151
2152 /* coro hv's (and only hv's at the moment) are supported as well */
2153 if (SvSTATEhv_p (aTHX_ cb))
2154 api_ready (aTHX_ cb);
2155 else
740 { 2156 {
741 prev__stack->top_env = PL_top_env; 2157 dSP; /* don't disturb outer sp */
742 PL_top_env = next->stack->top_env; 2158 PUSHMARK (SP);
743 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2159
2160 if (coro->status)
2161 {
2162 PUTBACK;
2163 coro_push_av (aTHX_ coro->status, G_ARRAY);
2164 SPAGAIN;
2165 }
2166
2167 PUTBACK;
2168 call_sv (cb, G_VOID | G_DISCARD);
744 } 2169 }
745
746 free_coro_mortal ();
747
748 UNLOCK;
749 }
750}
751
752/* use this function pointer to call the above function */
753/* this is done to increase chances of the compiler not inlining the call */
754/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757struct transfer_args
758{
759 struct coro *prev, *next;
760 int flags;
761};
762
763#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
764
765static void
766coro_state_destroy (struct coro *coro)
767{
768 if (coro->refcnt--)
769 return;
770
771 if (coro->mainstack && coro->mainstack != main_mainstack)
772 { 2170 }
773 struct coro temp; 2171}
774 2172
775 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 2173static void
776 LOAD (aTHX_ coro); 2174coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
777 2175{
778 destroy_stacks (aTHX); 2176 AV *av;
779 2177
780 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2178 if (coro->status)
781
782 coro->mainstack = 0;
783 } 2179 {
2180 av = coro->status;
2181 av_clear (av);
2182 }
2183 else
2184 av = coro->status = newAV ();
784 2185
785 stack_free (coro->stack); 2186 /* items are actually not so common, so optimise for this case */
786 SvREFCNT_dec (coro->args); 2187 if (items)
787 Safefree (coro); 2188 {
2189 int i;
2190
2191 av_extend (av, items - 1);
2192
2193 for (i = 0; i < items; ++i)
2194 av_push (av, SvREFCNT_inc_NN (arg [i]));
2195 }
2196}
2197
2198static void
2199slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2200{
2201 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2202 api_ready (aTHX_ sv_manager);
2203
2204 frame->prepare = prepare_schedule;
2205 frame->check = slf_check_repeat;
2206
2207 /* as a minor optimisation, we could unwind all stacks here */
2208 /* but that puts extra pressure on pp_slf, and is not worth much */
2209 /*coro_unwind_stacks (aTHX);*/
2210}
2211
2212static void
2213slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2214{
2215 HV *coro_hv = (HV *)SvRV (coro_current);
2216
2217 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2218 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2219}
2220
2221static void
2222slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 HV *coro_hv;
2225 struct coro *coro;
2226
2227 if (items <= 0)
2228 croak ("Coro::cancel called without coro object,");
2229
2230 coro = SvSTATE (arg [0]);
2231 coro_hv = coro->hv;
2232
2233 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2234
2235 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2236 {
2237 /* coro currently busy cancelling something, so just notify it */
2238 coro->slf_frame.data = (void *)coro;
2239
2240 frame->prepare = prepare_nop;
2241 frame->check = slf_check_nop;
2242 }
2243 else if (coro_hv == (HV *)SvRV (coro_current))
2244 {
2245 /* cancelling the current coro is allowed, and equals terminate */
2246 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2247 }
2248 else
2249 {
2250 struct coro *self = SvSTATE_current;
2251
2252 /* otherwise we cancel directly, purely for speed reasons
2253 * unfortunately, this requires some magic trickery, as
2254 * somebody else could cancel us, so we have to fight the cancellation.
2255 * this is ugly, and hopefully fully worth the extra speed.
2256 * besides, I can't get the slow-but-safe version working...
2257 */
2258 slf_frame.data = 0;
2259 self->flags |= CF_NOCANCEL;
2260 coro_state_destroy (aTHX_ coro);
2261 self->flags &= ~CF_NOCANCEL;
2262
2263 if (slf_frame.data)
2264 {
2265 /* while we were busy we have been cancelled, so terminate */
2266 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2267 }
2268 else
2269 {
2270 frame->prepare = prepare_nop;
2271 frame->check = slf_check_nop;
2272 }
2273 }
788} 2274}
789 2275
790static int 2276static int
791coro_state_clear (SV *sv, MAGIC *mg) 2277slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
792{ 2278{
793 struct coro *coro = (struct coro *)mg->mg_ptr; 2279 frame->prepare = 0;
794 mg->mg_ptr = 0; 2280 coro_unwind_stacks (aTHX);
795 2281
796 coro_state_destroy (coro); 2282 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
797 2283
798 return 0; 2284 return 1;
799} 2285}
800 2286
801static int 2287static int
802coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 2288safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
803{ 2289{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 2290 if (coro->cctx)
2291 croak ("coro inside C callback, unable to cancel at this time, caught");
805 2292
806 ++coro->refcnt; 2293 if (coro->flags & CF_NEW)
2294 {
2295 coro_set_status (aTHX_ coro, arg, items);
2296 coro_state_destroy (aTHX_ coro);
2297 }
2298 else
2299 {
2300 if (!coro->slf_frame.prepare)
2301 croak ("coro outside an SLF function, unable to cancel at this time, caught");
807 2302
2303 slf_destroy (aTHX_ coro);
2304
2305 coro_set_status (aTHX_ coro, arg, items);
2306 coro->slf_frame.prepare = prepare_nop;
2307 coro->slf_frame.check = slf_check_safe_cancel;
2308
2309 api_ready (aTHX_ (SV *)coro->hv);
2310 }
2311
808 return 0; 2312 return 1;
809} 2313}
810 2314
811static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
812
813static struct coro *
814SvSTATE (SV *coro)
815{
816 HV *stash;
817 MAGIC *mg;
818
819 if (SvROK (coro))
820 coro = SvRV (coro);
821
822 stash = SvSTASH (coro);
823 if (stash != coro_stash && stash != coro_state_stash)
824 {
825 /* very slow, but rare, check */
826 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827 croak ("Coro::State object required");
828 }
829
830 mg = SvMAGIC (coro);
831 assert (mg->mg_type == PERL_MAGIC_ext);
832 return (struct coro *)mg->mg_ptr;
833}
834
835static void
836prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
837{
838 ta->prev = SvSTATE (prev);
839 ta->next = SvSTATE (next);
840 ta->flags = flags;
841}
842
843static void
844api_transfer (SV *prev, SV *next, int flags)
845{
846 dTHX;
847 struct transfer_args ta;
848
849 prepare_transfer (aTHX_ &ta, prev, next, flags);
850 TRANSFER (ta);
851}
852
853/** Coro ********************************************************************/ 2315/*****************************************************************************/
2316/* async pool handler */
854 2317
855#define PRIO_MAX 3
856#define PRIO_HIGH 1
857#define PRIO_NORMAL 0
858#define PRIO_LOW -1
859#define PRIO_IDLE -3
860#define PRIO_MIN -4
861
862/* for Coro.pm */
863static GV *coro_current, *coro_idle;
864static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865static int coro_nready;
866
867static void 2318static int
868coro_enq (pTHX_ SV *sv) 2319slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
869{ 2320{
870 int prio; 2321 HV *hv = (HV *)SvRV (coro_current);
2322 struct coro *coro = (struct coro *)frame->data;
871 2323
872 if (SvTYPE (sv) != SVt_PVHV) 2324 if (!coro->invoke_cb)
873 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2325 return 1; /* loop till we have invoke */
874 2326 else
875 prio = SvSTATE (sv)->prio;
876
877 av_push (coro_ready [prio - PRIO_MIN], sv);
878 coro_nready++;
879}
880
881static SV *
882coro_deq (pTHX_ int min_prio)
883{
884 int prio = PRIO_MAX - PRIO_MIN;
885
886 min_prio -= PRIO_MIN;
887 if (min_prio < 0)
888 min_prio = 0;
889
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891 if (AvFILLp (coro_ready [prio]) >= 0)
892 { 2327 {
893 coro_nready--; 2328 hv_store (hv, "desc", sizeof ("desc") - 1,
894 return av_shift (coro_ready [prio]); 2329 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
895 }
896 2330
897 return 0; 2331 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
898}
899
900static void
901api_ready (SV *coro)
902{
903 dTHX;
904
905 if (SvROK (coro))
906 coro = SvRV (coro);
907
908 LOCK;
909 coro_enq (aTHX_ SvREFCNT_inc (coro));
910 UNLOCK;
911}
912
913static void
914prepare_schedule (aTHX_ struct transfer_args *ta)
915{
916 SV *current, *prev, *next;
917
918 LOCK;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925
926 next = coro_deq (aTHX_ PRIO_MIN);
927
928 if (next)
929 break;
930
931 UNLOCK;
932 2332
933 { 2333 {
934 dSP; 2334 dSP;
935 2335 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
936 ENTER;
937 SAVETMPS;
938
939 PUSHMARK (SP);
940 PUTBACK; 2336 PUTBACK;
941 call_sv (GvSV (coro_idle), G_DISCARD);
942
943 FREETMPS;
944 LEAVE;
945 } 2337 }
2338
2339 SvREFCNT_dec (GvAV (PL_defgv));
2340 GvAV (PL_defgv) = coro->invoke_av;
2341 coro->invoke_av = 0;
2342
2343 return 0;
2344 }
2345}
2346
2347static void
2348slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2349{
2350 HV *hv = (HV *)SvRV (coro_current);
2351 struct coro *coro = SvSTATE_hv ((SV *)hv);
2352
2353 if (ecb_expect_true (coro->saved_deffh))
946 } 2354 {
2355 /* subsequent iteration */
2356 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2357 coro->saved_deffh = 0;
947 2358
948 prev = SvRV (current); 2359 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
949 SvRV (current) = next; 2360 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2361 {
2362 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2363 return;
2364 }
2365 else
2366 {
2367 av_clear (GvAV (PL_defgv));
2368 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
950 2369
951 /* free this only after the transfer */ 2370 coro->prio = 0;
952 free_coro_mortal ();
953 coro_mortal = prev;
954 2371
955 ta->prev = SvSTATE (prev); 2372 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
956 ta->next = SvSTATE (next); 2373 api_trace (aTHX_ coro_current, 0);
957 ta->flags = TRANSFER_SAVE_ALL;
958 2374
959 UNLOCK; 2375 frame->prepare = prepare_schedule;
960} 2376 av_push (av_async_pool, SvREFCNT_inc (hv));
2377 }
2378 }
2379 else
2380 {
2381 /* first iteration, simply fall through */
2382 frame->prepare = prepare_nop;
2383 }
961 2384
2385 frame->check = slf_check_pool_handler;
2386 frame->data = (void *)coro;
2387}
2388
2389/*****************************************************************************/
2390/* rouse callback */
2391
2392#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2393
2394static void
2395coro_rouse_callback (pTHX_ CV *cv)
2396{
2397 dXSARGS;
2398 SV *data = (SV *)S_GENSUB_ARG;
2399
2400 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2401 {
2402 /* first call, set args */
2403 SV *coro = SvRV (data);
2404 AV *av = newAV ();
2405
2406 SvRV_set (data, (SV *)av);
2407
2408 /* better take a full copy of the arguments */
2409 while (items--)
2410 av_store (av, items, newSVsv (ST (items)));
2411
2412 api_ready (aTHX_ coro);
2413 SvREFCNT_dec (coro);
2414 }
2415
2416 XSRETURN_EMPTY;
2417}
2418
962static void 2419static int
2420slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2421{
2422 SV *data = (SV *)frame->data;
2423
2424 if (CORO_THROW)
2425 return 0;
2426
2427 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2428 return 1;
2429
2430 /* now push all results on the stack */
2431 {
2432 dSP;
2433 AV *av = (AV *)SvRV (data);
2434 int i;
2435
2436 EXTEND (SP, AvFILLp (av) + 1);
2437 for (i = 0; i <= AvFILLp (av); ++i)
2438 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2439
2440 /* we have stolen the elements, so set length to zero and free */
2441 AvFILLp (av) = -1;
2442 av_undef (av);
2443
2444 PUTBACK;
2445 }
2446
2447 return 0;
2448}
2449
2450static void
2451slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2452{
2453 SV *cb;
2454
2455 if (items)
2456 cb = arg [0];
2457 else
2458 {
2459 struct coro *coro = SvSTATE_current;
2460
2461 if (!coro->rouse_cb)
2462 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2463
2464 cb = sv_2mortal (coro->rouse_cb);
2465 coro->rouse_cb = 0;
2466 }
2467
2468 if (!SvROK (cb)
2469 || SvTYPE (SvRV (cb)) != SVt_PVCV
2470 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2471 croak ("Coro::rouse_wait called with illegal callback argument,");
2472
2473 {
2474 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2475 SV *data = (SV *)S_GENSUB_ARG;
2476
2477 frame->data = (void *)data;
2478 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2479 frame->check = slf_check_rouse_wait;
2480 }
2481}
2482
2483static SV *
2484coro_new_rouse_cb (pTHX)
2485{
2486 HV *hv = (HV *)SvRV (coro_current);
2487 struct coro *coro = SvSTATE_hv (hv);
2488 SV *data = newRV_inc ((SV *)hv);
2489 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2490
2491 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2492 SvREFCNT_dec (data); /* magicext increases the refcount */
2493
2494 SvREFCNT_dec (coro->rouse_cb);
2495 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2496
2497 return cb;
2498}
2499
2500/*****************************************************************************/
2501/* schedule-like-function opcode (SLF) */
2502
2503static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2504static const CV *slf_cv;
2505static SV **slf_argv;
2506static int slf_argc, slf_arga; /* count, allocated */
2507static I32 slf_ax; /* top of stack, for restore */
2508
2509/* this restores the stack in the case we patched the entersub, to */
2510/* recreate the stack frame as perl will on following calls */
2511/* since entersub cleared the stack */
2512static OP *
2513pp_restore (pTHX)
2514{
2515 int i;
2516 SV **SP = PL_stack_base + slf_ax;
2517
2518 PUSHMARK (SP);
2519
2520 EXTEND (SP, slf_argc + 1);
2521
2522 for (i = 0; i < slf_argc; ++i)
2523 PUSHs (sv_2mortal (slf_argv [i]));
2524
2525 PUSHs ((SV *)CvGV (slf_cv));
2526
2527 RETURNOP (slf_restore.op_first);
2528}
2529
2530static void
2531slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2532{
2533 SV **arg = (SV **)slf_frame.data;
2534
2535 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2536}
2537
2538static void
2539slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2540{
2541 if (items != 2)
2542 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2543
2544 frame->prepare = slf_prepare_transfer;
2545 frame->check = slf_check_nop;
2546 frame->data = (void *)arg; /* let's hope it will stay valid */
2547}
2548
2549static void
2550slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2551{
2552 frame->prepare = prepare_schedule;
2553 frame->check = slf_check_nop;
2554}
2555
2556static void
963prepare_cede (aTHX_ struct transfer_args *ta) 2557slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
964{ 2558{
965 LOCK; 2559 struct coro *next = (struct coro *)slf_frame.data;
966 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967 UNLOCK;
968 2560
2561 SvREFCNT_inc_NN (next->hv);
969 prepare_schedule (ta); 2562 prepare_schedule_to (aTHX_ ta, next);
970} 2563}
971 2564
972static void 2565static void
973api_schedule (void) 2566slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
974{ 2567{
975 dTHX; 2568 if (!items)
2569 croak ("Coro::schedule_to expects a coroutine argument, caught");
2570
2571 frame->data = (void *)SvSTATE (arg [0]);
2572 frame->prepare = slf_prepare_schedule_to;
2573 frame->check = slf_check_nop;
2574}
2575
2576static void
2577slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2578{
2579 api_ready (aTHX_ SvRV (coro_current));
2580
2581 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2582}
2583
2584static void
2585slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2586{
2587 frame->prepare = prepare_cede;
2588 frame->check = slf_check_nop;
2589}
2590
2591static void
2592slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2593{
2594 frame->prepare = prepare_cede_notself;
2595 frame->check = slf_check_nop;
2596}
2597
2598/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2599static void
2600slf_destroy (pTHX_ struct coro *coro)
2601{
2602 /* this callback is reserved for slf functions needing to do cleanup */
2603 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2604 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2605
2606 /*
2607 * The on_destroy above most likely is from an SLF call.
2608 * Since by definition the SLF call will not finish when we destroy
2609 * the coro, we will have to force-finish it here, otherwise
2610 * cleanup functions cannot call SLF functions.
2611 */
2612 coro->slf_frame.prepare = 0;
2613}
2614
2615/*
2616 * these not obviously related functions are all rolled into one
2617 * function to increase chances that they all will call transfer with the same
2618 * stack offset
2619 * SLF stands for "schedule-like-function".
2620 */
2621static OP *
2622pp_slf (pTHX)
2623{
2624 I32 checkmark; /* mark SP to see how many elements check has pushed */
2625
2626 /* set up the slf frame, unless it has already been set-up */
2627 /* the latter happens when a new coro has been started */
2628 /* or when a new cctx was attached to an existing coroutine */
2629 if (ecb_expect_true (!slf_frame.prepare))
2630 {
2631 /* first iteration */
2632 dSP;
2633 SV **arg = PL_stack_base + TOPMARK + 1;
2634 int items = SP - arg; /* args without function object */
2635 SV *gv = *sp;
2636
2637 /* do a quick consistency check on the "function" object, and if it isn't */
2638 /* for us, divert to the real entersub */
2639 if (SvTYPE (gv) != SVt_PVGV
2640 || !GvCV (gv)
2641 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2642 return PL_ppaddr[OP_ENTERSUB](aTHX);
2643
2644 if (!(PL_op->op_flags & OPf_STACKED))
2645 {
2646 /* ampersand-form of call, use @_ instead of stack */
2647 AV *av = GvAV (PL_defgv);
2648 arg = AvARRAY (av);
2649 items = AvFILLp (av) + 1;
2650 }
2651
2652 /* now call the init function, which needs to set up slf_frame */
2653 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2654 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2655
2656 /* pop args */
2657 SP = PL_stack_base + POPMARK;
2658
2659 PUTBACK;
2660 }
2661
2662 /* now that we have a slf_frame, interpret it! */
2663 /* we use a callback system not to make the code needlessly */
2664 /* complicated, but so we can run multiple perl coros from one cctx */
2665
2666 do
2667 {
976 struct transfer_args ta; 2668 struct coro_transfer_args ta;
977 2669
978 prepare_schedule (&ta); 2670 slf_frame.prepare (aTHX_ &ta);
979 TRANSFER (ta); 2671 TRANSFER (ta, 0);
980}
981 2672
2673 checkmark = PL_stack_sp - PL_stack_base;
2674 }
2675 while (slf_frame.check (aTHX_ &slf_frame));
2676
2677 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2678
2679 /* exception handling */
2680 if (ecb_expect_false (CORO_THROW))
2681 {
2682 SV *exception = sv_2mortal (CORO_THROW);
2683
2684 CORO_THROW = 0;
2685 sv_setsv (ERRSV, exception);
2686 croak (0);
2687 }
2688
2689 /* return value handling - mostly like entersub */
2690 /* make sure we put something on the stack in scalar context */
2691 if (GIMME_V == G_SCALAR
2692 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2693 {
2694 dSP;
2695 SV **bot = PL_stack_base + checkmark;
2696
2697 if (sp == bot) /* too few, push undef */
2698 bot [1] = &PL_sv_undef;
2699 else /* too many, take last one */
2700 bot [1] = *sp;
2701
2702 SP = bot + 1;
2703
2704 PUTBACK;
2705 }
2706
2707 return NORMAL;
2708}
2709
2710static void
2711api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2712{
2713 int i;
2714 SV **arg = PL_stack_base + ax;
2715 int items = PL_stack_sp - arg + 1;
2716
2717 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2718
2719 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2720 && PL_op->op_ppaddr != pp_slf)
2721 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2722
2723 CvFLAGS (cv) |= CVf_SLF;
2724 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2725 slf_cv = cv;
2726
2727 /* we patch the op, and then re-run the whole call */
2728 /* we have to put the same argument on the stack for this to work */
2729 /* and this will be done by pp_restore */
2730 slf_restore.op_next = (OP *)&slf_restore;
2731 slf_restore.op_type = OP_CUSTOM;
2732 slf_restore.op_ppaddr = pp_restore;
2733 slf_restore.op_first = PL_op;
2734
2735 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2736
2737 if (PL_op->op_flags & OPf_STACKED)
2738 {
2739 if (items > slf_arga)
2740 {
2741 slf_arga = items;
2742 Safefree (slf_argv);
2743 New (0, slf_argv, slf_arga, SV *);
2744 }
2745
2746 slf_argc = items;
2747
2748 for (i = 0; i < items; ++i)
2749 slf_argv [i] = SvREFCNT_inc (arg [i]);
2750 }
2751 else
2752 slf_argc = 0;
2753
2754 PL_op->op_ppaddr = pp_slf;
2755 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2756
2757 PL_op = (OP *)&slf_restore;
2758}
2759
2760/*****************************************************************************/
2761/* dynamic wind */
2762
2763static void
2764on_enterleave_call (pTHX_ SV *cb)
2765{
2766 dSP;
2767
2768 PUSHSTACK;
2769
2770 PUSHMARK (SP);
2771 PUTBACK;
2772 call_sv (cb, G_VOID | G_DISCARD);
2773 SPAGAIN;
2774
2775 POPSTACK;
2776}
2777
2778static SV *
2779coro_avp_pop_and_free (pTHX_ AV **avp)
2780{
2781 AV *av = *avp;
2782 SV *res = av_pop (av);
2783
2784 if (AvFILLp (av) < 0)
2785 {
2786 *avp = 0;
2787 SvREFCNT_dec (av);
2788 }
2789
2790 return res;
2791}
2792
2793static void
2794coro_pop_on_enter (pTHX_ void *coro)
2795{
2796 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2797 SvREFCNT_dec (cb);
2798}
2799
2800static void
2801coro_pop_on_leave (pTHX_ void *coro)
2802{
2803 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2804 on_enterleave_call (aTHX_ sv_2mortal (cb));
2805}
2806
2807/*****************************************************************************/
2808/* PerlIO::cede */
2809
2810typedef struct
2811{
2812 PerlIOBuf base;
2813 NV next, every;
2814} PerlIOCede;
2815
2816static IV ecb_cold
2817PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2818{
2819 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2820
2821 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2822 self->next = nvtime () + self->every;
2823
2824 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2825}
2826
2827static SV * ecb_cold
2828PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2829{
2830 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2831
2832 return newSVnv (self->every);
2833}
2834
2835static IV
2836PerlIOCede_flush (pTHX_ PerlIO *f)
2837{
2838 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2839 double now = nvtime ();
2840
2841 if (now >= self->next)
2842 {
2843 api_cede (aTHX);
2844 self->next = now + self->every;
2845 }
2846
2847 return PerlIOBuf_flush (aTHX_ f);
2848}
2849
2850static PerlIO_funcs PerlIO_cede =
2851{
2852 sizeof(PerlIO_funcs),
2853 "cede",
2854 sizeof(PerlIOCede),
2855 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2856 PerlIOCede_pushed,
2857 PerlIOBuf_popped,
2858 PerlIOBuf_open,
2859 PerlIOBase_binmode,
2860 PerlIOCede_getarg,
2861 PerlIOBase_fileno,
2862 PerlIOBuf_dup,
2863 PerlIOBuf_read,
2864 PerlIOBuf_unread,
2865 PerlIOBuf_write,
2866 PerlIOBuf_seek,
2867 PerlIOBuf_tell,
2868 PerlIOBuf_close,
2869 PerlIOCede_flush,
2870 PerlIOBuf_fill,
2871 PerlIOBase_eof,
2872 PerlIOBase_error,
2873 PerlIOBase_clearerr,
2874 PerlIOBase_setlinebuf,
2875 PerlIOBuf_get_base,
2876 PerlIOBuf_bufsiz,
2877 PerlIOBuf_get_ptr,
2878 PerlIOBuf_get_cnt,
2879 PerlIOBuf_set_ptrcnt,
2880};
2881
2882/*****************************************************************************/
2883/* Coro::Semaphore & Coro::Signal */
2884
2885static SV *
2886coro_waitarray_new (pTHX_ int count)
2887{
2888 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2889 AV *av = newAV ();
2890 SV **ary;
2891
2892 /* unfortunately, building manually saves memory */
2893 Newx (ary, 2, SV *);
2894 AvALLOC (av) = ary;
2895#if PERL_VERSION_ATLEAST (5,10,0)
2896 AvARRAY (av) = ary;
2897#else
2898 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2899 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2900 SvPVX ((SV *)av) = (char *)ary;
2901#endif
2902 AvMAX (av) = 1;
2903 AvFILLp (av) = 0;
2904 ary [0] = newSViv (count);
2905
2906 return newRV_noinc ((SV *)av);
2907}
2908
2909/* semaphore */
2910
2911static void
2912coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2913{
2914 SV *count_sv = AvARRAY (av)[0];
2915 IV count = SvIVX (count_sv);
2916
2917 count += adjust;
2918 SvIVX (count_sv) = count;
2919
2920 /* now wake up as many waiters as are expected to lock */
2921 while (count > 0 && AvFILLp (av) > 0)
2922 {
2923 SV *cb;
2924
2925 /* swap first two elements so we can shift a waiter */
2926 AvARRAY (av)[0] = AvARRAY (av)[1];
2927 AvARRAY (av)[1] = count_sv;
2928 cb = av_shift (av);
2929
2930 if (SvOBJECT (cb))
2931 {
2932 api_ready (aTHX_ cb);
2933 --count;
2934 }
2935 else if (SvTYPE (cb) == SVt_PVCV)
2936 {
2937 dSP;
2938 PUSHMARK (SP);
2939 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2940 PUTBACK;
2941 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2942 }
2943
2944 SvREFCNT_dec (cb);
2945 }
2946}
2947
2948static void
2949coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2950{
2951 /* call $sem->adjust (0) to possibly wake up some other waiters */
2952 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2953}
2954
982static void 2955static int
983api_cede (void) 2956slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
984{ 2957{
985 dTHX; 2958 AV *av = (AV *)frame->data;
986 struct transfer_args ta; 2959 SV *count_sv = AvARRAY (av)[0];
2960 SV *coro_hv = SvRV (coro_current);
987 2961
988 prepare_cede (&ta); 2962 /* if we are about to throw, don't actually acquire the lock, just throw */
989 TRANSFER (ta); 2963 if (CORO_THROW)
990} 2964 return 0;
2965 else if (SvIVX (count_sv) > 0)
2966 {
2967 frame->destroy = 0;
991 2968
2969 if (acquire)
2970 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2971 else
2972 coro_semaphore_adjust (aTHX_ av, 0);
2973
2974 return 0;
2975 }
2976 else
2977 {
2978 int i;
2979 /* if we were woken up but can't down, we look through the whole */
2980 /* waiters list and only add us if we aren't in there already */
2981 /* this avoids some degenerate memory usage cases */
2982 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2983 if (AvARRAY (av)[i] == coro_hv)
2984 return 1;
2985
2986 av_push (av, SvREFCNT_inc (coro_hv));
2987 return 1;
2988 }
2989}
2990
2991static int
2992slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2993{
2994 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2995}
2996
2997static int
2998slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2999{
3000 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3001}
3002
3003static void
3004slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3005{
3006 AV *av = (AV *)SvRV (arg [0]);
3007
3008 if (SvIVX (AvARRAY (av)[0]) > 0)
3009 {
3010 frame->data = (void *)av;
3011 frame->prepare = prepare_nop;
3012 }
3013 else
3014 {
3015 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3016
3017 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3018 frame->prepare = prepare_schedule;
3019 /* to avoid race conditions when a woken-up coro gets terminated */
3020 /* we arrange for a temporary on_destroy that calls adjust (0) */
3021 frame->destroy = coro_semaphore_destroy;
3022 }
3023}
3024
3025static void
3026slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3027{
3028 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3029 frame->check = slf_check_semaphore_down;
3030}
3031
3032static void
3033slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3034{
3035 if (items >= 2)
3036 {
3037 /* callback form */
3038 AV *av = (AV *)SvRV (arg [0]);
3039 SV *cb_cv = s_get_cv_croak (arg [1]);
3040
3041 av_push (av, SvREFCNT_inc_NN (cb_cv));
3042
3043 if (SvIVX (AvARRAY (av)[0]) > 0)
3044 coro_semaphore_adjust (aTHX_ av, 0);
3045
3046 frame->prepare = prepare_nop;
3047 frame->check = slf_check_nop;
3048 }
3049 else
3050 {
3051 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3052 frame->check = slf_check_semaphore_wait;
3053 }
3054}
3055
3056/* signal */
3057
3058static void
3059coro_signal_wake (pTHX_ AV *av, int count)
3060{
3061 SvIVX (AvARRAY (av)[0]) = 0;
3062
3063 /* now signal count waiters */
3064 while (count > 0 && AvFILLp (av) > 0)
3065 {
3066 SV *cb;
3067
3068 /* swap first two elements so we can shift a waiter */
3069 cb = AvARRAY (av)[0];
3070 AvARRAY (av)[0] = AvARRAY (av)[1];
3071 AvARRAY (av)[1] = cb;
3072
3073 cb = av_shift (av);
3074
3075 if (SvTYPE (cb) == SVt_PVCV)
3076 {
3077 dSP;
3078 PUSHMARK (SP);
3079 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3080 PUTBACK;
3081 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3082 }
3083 else
3084 {
3085 api_ready (aTHX_ cb);
3086 sv_setiv (cb, 0); /* signal waiter */
3087 }
3088
3089 SvREFCNT_dec (cb);
3090
3091 --count;
3092 }
3093}
3094
3095static int
3096slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3097{
3098 /* if we are about to throw, also stop waiting */
3099 return SvROK ((SV *)frame->data) && !CORO_THROW;
3100}
3101
3102static void
3103slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3104{
3105 AV *av = (AV *)SvRV (arg [0]);
3106
3107 if (items >= 2)
3108 {
3109 SV *cb_cv = s_get_cv_croak (arg [1]);
3110 av_push (av, SvREFCNT_inc_NN (cb_cv));
3111
3112 if (SvIVX (AvARRAY (av)[0]))
3113 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3114
3115 frame->prepare = prepare_nop;
3116 frame->check = slf_check_nop;
3117 }
3118 else if (SvIVX (AvARRAY (av)[0]))
3119 {
3120 SvIVX (AvARRAY (av)[0]) = 0;
3121 frame->prepare = prepare_nop;
3122 frame->check = slf_check_nop;
3123 }
3124 else
3125 {
3126 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3127
3128 av_push (av, waiter);
3129
3130 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3131 frame->prepare = prepare_schedule;
3132 frame->check = slf_check_signal_wait;
3133 }
3134}
3135
3136/*****************************************************************************/
3137/* Coro::AIO */
3138
3139#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3140
3141/* helper storage struct */
3142struct io_state
3143{
3144 int errorno;
3145 I32 laststype; /* U16 in 5.10.0 */
3146 int laststatval;
3147 Stat_t statcache;
3148};
3149
3150static void
3151coro_aio_callback (pTHX_ CV *cv)
3152{
3153 dXSARGS;
3154 AV *state = (AV *)S_GENSUB_ARG;
3155 SV *coro = av_pop (state);
3156 SV *data_sv = newSV (sizeof (struct io_state));
3157
3158 av_extend (state, items - 1);
3159
3160 sv_upgrade (data_sv, SVt_PV);
3161 SvCUR_set (data_sv, sizeof (struct io_state));
3162 SvPOK_only (data_sv);
3163
3164 {
3165 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3166
3167 data->errorno = errno;
3168 data->laststype = PL_laststype;
3169 data->laststatval = PL_laststatval;
3170 data->statcache = PL_statcache;
3171 }
3172
3173 /* now build the result vector out of all the parameters and the data_sv */
3174 {
3175 int i;
3176
3177 for (i = 0; i < items; ++i)
3178 av_push (state, SvREFCNT_inc_NN (ST (i)));
3179 }
3180
3181 av_push (state, data_sv);
3182
3183 api_ready (aTHX_ coro);
3184 SvREFCNT_dec (coro);
3185 SvREFCNT_dec ((AV *)state);
3186}
3187
3188static int
3189slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3190{
3191 AV *state = (AV *)frame->data;
3192
3193 /* if we are about to throw, return early */
3194 /* this does not cancel the aio request, but at least */
3195 /* it quickly returns */
3196 if (CORO_THROW)
3197 return 0;
3198
3199 /* one element that is an RV? repeat! */
3200 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3201 return 1;
3202
3203 /* restore status */
3204 {
3205 SV *data_sv = av_pop (state);
3206 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3207
3208 errno = data->errorno;
3209 PL_laststype = data->laststype;
3210 PL_laststatval = data->laststatval;
3211 PL_statcache = data->statcache;
3212
3213 SvREFCNT_dec (data_sv);
3214 }
3215
3216 /* push result values */
3217 {
3218 dSP;
3219 int i;
3220
3221 EXTEND (SP, AvFILLp (state) + 1);
3222 for (i = 0; i <= AvFILLp (state); ++i)
3223 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3224
3225 PUTBACK;
3226 }
3227
3228 return 0;
3229}
3230
3231static void
3232slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3233{
3234 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3235 SV *coro_hv = SvRV (coro_current);
3236 struct coro *coro = SvSTATE_hv (coro_hv);
3237
3238 /* put our coroutine id on the state arg */
3239 av_push (state, SvREFCNT_inc_NN (coro_hv));
3240
3241 /* first see whether we have a non-zero priority and set it as AIO prio */
3242 if (coro->prio)
3243 {
3244 dSP;
3245
3246 static SV *prio_cv;
3247 static SV *prio_sv;
3248
3249 if (ecb_expect_false (!prio_cv))
3250 {
3251 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3252 prio_sv = newSViv (0);
3253 }
3254
3255 PUSHMARK (SP);
3256 sv_setiv (prio_sv, coro->prio);
3257 XPUSHs (prio_sv);
3258
3259 PUTBACK;
3260 call_sv (prio_cv, G_VOID | G_DISCARD);
3261 }
3262
3263 /* now call the original request */
3264 {
3265 dSP;
3266 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3267 int i;
3268
3269 PUSHMARK (SP);
3270
3271 /* first push all args to the stack */
3272 EXTEND (SP, items + 1);
3273
3274 for (i = 0; i < items; ++i)
3275 PUSHs (arg [i]);
3276
3277 /* now push the callback closure */
3278 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3279
3280 /* now call the AIO function - we assume our request is uncancelable */
3281 PUTBACK;
3282 call_sv ((SV *)req, G_VOID | G_DISCARD);
3283 }
3284
3285 /* now that the request is going, we loop till we have a result */
3286 frame->data = (void *)state;
3287 frame->prepare = prepare_schedule;
3288 frame->check = slf_check_aio_req;
3289}
3290
3291static void
3292coro_aio_req_xs (pTHX_ CV *cv)
3293{
3294 dXSARGS;
3295
3296 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3297
3298 XSRETURN_EMPTY;
3299}
3300
3301/*****************************************************************************/
3302
3303#if CORO_CLONE
3304# include "clone.c"
3305#endif
3306
3307/*****************************************************************************/
3308
3309static SV *
3310coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3311{
3312 SV *coro_sv;
3313 struct coro *coro;
3314 MAGIC *mg;
3315 HV *hv;
3316 SV *cb;
3317 int i;
3318
3319 if (argc > 0)
3320 {
3321 cb = s_get_cv_croak (argv [0]);
3322
3323 if (!is_coro)
3324 {
3325 if (CvISXSUB (cb))
3326 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3327
3328 if (!CvROOT (cb))
3329 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3330 }
3331 }
3332
3333 Newz (0, coro, 1, struct coro);
3334 coro->args = newAV ();
3335 coro->flags = CF_NEW;
3336
3337 if (coro_first) coro_first->prev = coro;
3338 coro->next = coro_first;
3339 coro_first = coro;
3340
3341 coro->hv = hv = newHV ();
3342 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3343 mg->mg_flags |= MGf_DUP;
3344 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3345
3346 if (argc > 0)
3347 {
3348 av_extend (coro->args, argc + is_coro - 1);
3349
3350 if (is_coro)
3351 {
3352 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3353 cb = (SV *)cv_coro_run;
3354 }
3355
3356 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3357
3358 for (i = 1; i < argc; i++)
3359 av_push (coro->args, newSVsv (argv [i]));
3360 }
3361
3362 return coro_sv;
3363}
3364
3365#ifndef __cplusplus
3366ecb_cold XS(boot_Coro__State);
3367#endif
3368
3369#if CORO_JIT
3370
3371static void ecb_noinline ecb_cold
3372pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3373{
3374 dSP;
3375 AV *av = newAV ();
3376
3377 av_store (av, 3, newSVuv (d));
3378 av_store (av, 2, newSVuv (c));
3379 av_store (av, 1, newSVuv (b));
3380 av_store (av, 0, newSVuv (a));
3381
3382 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3383
3384 PUTBACK;
3385}
3386
3387static void ecb_noinline ecb_cold
3388jit_init (pTHX)
3389{
3390 dSP;
3391 SV *load, *save;
3392 char *map_base;
3393 char *load_ptr, *save_ptr;
3394 STRLEN load_len, save_len, map_len;
3395 int count;
3396
3397 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3398
3399 PUSHMARK (SP);
3400 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3401 #include "state.h"
3402 count = call_pv ("Coro::State::_jit", G_ARRAY);
3403 SPAGAIN;
3404
3405 save = POPs; save_ptr = SvPVbyte (save, save_len);
3406 load = POPs; load_ptr = SvPVbyte (load, load_len);
3407
3408 map_len = load_len + save_len + 16;
3409
3410 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3411
3412 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3413
3414 load_perl_slots = (load_save_perl_slots_type)map_base;
3415 memcpy (map_base, load_ptr, load_len);
3416
3417 map_base += (load_len + 15) & ~15;
3418
3419 save_perl_slots = (load_save_perl_slots_type)map_base;
3420 memcpy (map_base, save_ptr, save_len);
3421
3422 /* we are good citizens and try to make the page read-only, so the evil evil */
3423 /* hackers might have it a bit more difficult */
3424 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3425
3426 PUTBACK;
3427 eval_pv ("undef &Coro::State::_jit", 1);
3428}
3429
3430#endif
3431
992MODULE = Coro::State PACKAGE = Coro::State 3432MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
993 3433
994PROTOTYPES: DISABLE 3434PROTOTYPES: DISABLE
995 3435
996BOOT: 3436BOOT:
997{ 3437{
998#ifdef USE_ITHREADS 3438#ifdef USE_ITHREADS
999 MUTEX_INIT (&coro_mutex); 3439# if CORO_PTHREAD
3440 coro_thx = PERL_GET_CONTEXT;
3441# endif
1000#endif 3442#endif
1001 BOOT_PAGESIZE; 3443 BOOT_PAGESIZE;
1002 3444
3445 /* perl defines these to check for existance first, but why it doesn't */
3446 /* just create them one at init time is not clear to me, except for */
3447 /* programs trying to delete them, but... */
3448 /* anyway, we declare this as invalid and make sure they are initialised here */
3449 DEFSV;
3450 ERRSV;
3451
3452 cctx_current = cctx_new_empty ();
3453
3454 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3455 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3456
3457 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3458 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3459 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3460
3461 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3462 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3463 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3464
1003 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3465 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004 3466
1005 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3467 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1006 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3468 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1007 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3469 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3470 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1008 3471
1009 main_mainstack = PL_mainstack; 3472 main_mainstack = PL_mainstack;
3473 main_top_env = PL_top_env;
1010 3474
3475 while (main_top_env->je_prev)
3476 main_top_env = main_top_env->je_prev;
3477
3478 {
3479 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3480
3481 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3482 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3483
3484 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3485 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3486 }
3487
1011 coroapi.ver = CORO_API_VERSION; 3488 coroapi.ver = CORO_API_VERSION;
3489 coroapi.rev = CORO_API_REVISION;
3490
1012 coroapi.transfer = api_transfer; 3491 coroapi.transfer = api_transfer;
1013 3492
3493 coroapi.sv_state = SvSTATE_;
3494 coroapi.execute_slf = api_execute_slf;
3495 coroapi.prepare_nop = prepare_nop;
3496 coroapi.prepare_schedule = prepare_schedule;
3497 coroapi.prepare_cede = prepare_cede;
3498 coroapi.prepare_cede_notself = prepare_cede_notself;
3499
3500 time_init (aTHX);
3501
1014 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3502 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3503#if CORO_JIT
3504 PUTBACK;
3505 jit_init (aTHX);
3506 SPAGAIN;
3507#endif
1015} 3508}
1016 3509
1017SV * 3510SV *
1018new (char *klass, ...) 3511new (SV *klass, ...)
3512 ALIAS:
3513 Coro::new = 1
1019 CODE: 3514 CODE:
1020{ 3515 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1021 struct coro *coro; 3516 OUTPUT:
1022 HV *hv;
1023 int i;
1024
1025 Newz (0, coro, 1, struct coro);
1026 coro->args = newAV ();
1027
1028 hv = newHV ();
1029 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1030 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031
1032 for (i = 1; i < items; i++)
1033 av_push (coro->args, newSVsv (ST (i)));
1034
1035 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1036 /*coro->stack = 0;*/
1037}
1038 OUTPUT:
1039 RETVAL 3517 RETVAL
1040 3518
1041void 3519void
1042_set_stacklevel (...) 3520transfer (...)
1043 ALIAS: 3521 PROTOTYPE: $$
1044 Coro::State::transfer = 1 3522 CODE:
1045 Coro::schedule = 2 3523 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1046 Coro::cede = 3
1047 Coro::Cont::yield = 4
1048 CODE:
1049{
1050 struct transfer_args ta;
1051
1052 switch (ix)
1053 {
1054 case 0:
1055 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1056 ta.next = 0;
1057 ta.flags = TRANSFER_SET_STACKLEVEL;
1058 break;
1059
1060 case 1:
1061 if (items != 3)
1062 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1063
1064 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1065 break;
1066
1067 case 2:
1068 prepare_schedule (&ta);
1069 break;
1070
1071 case 3:
1072 prepare_cede (&ta);
1073 break;
1074
1075 case 4:
1076 {
1077 SV *yieldstack;
1078 SV *sv;
1079 AV *defav = GvAV (PL_defgv);
1080
1081 yieldstack = *hv_fetch (
1082 (HV *)SvRV (GvSV (coro_current)),
1083 "yieldstack", sizeof ("yieldstack") - 1,
1084 0
1085 );
1086
1087 /* set up @_ -- ugly */
1088 av_clear (defav);
1089 av_fill (defav, items - 1);
1090 while (items--)
1091 av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093 sv = av_pop ((AV *)SvRV (yieldstack));
1094 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096 ta.flags = 0;
1097 SvREFCNT_dec (sv);
1098 }
1099 break;
1100
1101 }
1102
1103 TRANSFER (ta);
1104}
1105 3524
1106void 3525void
1107_clone_state_from (SV *dst, SV *src)
1108 CODE:
1109{
1110 struct coro *coro_src = SvSTATE (src);
1111
1112 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114 ++coro_src->refcnt;
1115 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116}
1117
1118void
1119_nonlocal_goto (IV nextop)
1120 CODE:
1121 /* uuh, somebody will kill me again for this */
1122 PL_op->op_next = INT2PTR (OP *, nextop);
1123
1124void
1125_exit (code) 3526_exit (int code)
1126 int code
1127 PROTOTYPE: $ 3527 PROTOTYPE: $
1128 CODE: 3528 CODE:
1129 _exit (code); 3529 _exit (code);
1130 3530
3531SV *
3532clone (Coro::State coro)
3533 CODE:
3534{
3535#if CORO_CLONE
3536 struct coro *ncoro = coro_clone (aTHX_ coro);
3537 MAGIC *mg;
3538 /* TODO: too much duplication */
3539 ncoro->hv = newHV ();
3540 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3541 mg->mg_flags |= MGf_DUP;
3542 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3543#else
3544 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3545#endif
3546}
3547 OUTPUT:
3548 RETVAL
3549
3550int
3551cctx_stacksize (int new_stacksize = 0)
3552 PROTOTYPE: ;$
3553 CODE:
3554 RETVAL = cctx_stacksize;
3555 if (new_stacksize)
3556 {
3557 cctx_stacksize = new_stacksize;
3558 ++cctx_gen;
3559 }
3560 OUTPUT:
3561 RETVAL
3562
3563int
3564cctx_max_idle (int max_idle = 0)
3565 PROTOTYPE: ;$
3566 CODE:
3567 RETVAL = cctx_max_idle;
3568 if (max_idle > 1)
3569 cctx_max_idle = max_idle;
3570 OUTPUT:
3571 RETVAL
3572
3573int
3574cctx_count ()
3575 PROTOTYPE:
3576 CODE:
3577 RETVAL = cctx_count;
3578 OUTPUT:
3579 RETVAL
3580
3581int
3582cctx_idle ()
3583 PROTOTYPE:
3584 CODE:
3585 RETVAL = cctx_idle;
3586 OUTPUT:
3587 RETVAL
3588
3589void
3590list ()
3591 PROTOTYPE:
3592 PPCODE:
3593{
3594 struct coro *coro;
3595 for (coro = coro_first; coro; coro = coro->next)
3596 if (coro->hv)
3597 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3598}
3599
3600void
3601call (Coro::State coro, SV *coderef)
3602 ALIAS:
3603 eval = 1
3604 CODE:
3605{
3606 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3607 {
3608 struct coro *current = SvSTATE_current;
3609 struct CoroSLF slf_save;
3610
3611 if (current != coro)
3612 {
3613 PUTBACK;
3614 save_perl (aTHX_ current);
3615 load_perl (aTHX_ coro);
3616 /* the coro is most likely in an active SLF call.
3617 * while not strictly required (the code we execute is
3618 * not allowed to call any SLF functions), it's cleaner
3619 * to reinitialise the slf_frame and restore it later.
3620 * This might one day allow us to actually do SLF calls
3621 * from code executed here.
3622 */
3623 slf_save = slf_frame;
3624 slf_frame.prepare = 0;
3625 SPAGAIN;
3626 }
3627
3628 PUSHSTACK;
3629
3630 PUSHMARK (SP);
3631 PUTBACK;
3632
3633 if (ix)
3634 eval_sv (coderef, 0);
3635 else
3636 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3637
3638 POPSTACK;
3639 SPAGAIN;
3640
3641 if (current != coro)
3642 {
3643 PUTBACK;
3644 slf_frame = slf_save;
3645 save_perl (aTHX_ coro);
3646 load_perl (aTHX_ current);
3647 SPAGAIN;
3648 }
3649 }
3650}
3651
3652SV *
3653is_ready (Coro::State coro)
3654 PROTOTYPE: $
3655 ALIAS:
3656 is_ready = CF_READY
3657 is_running = CF_RUNNING
3658 is_new = CF_NEW
3659 is_destroyed = CF_ZOMBIE
3660 is_zombie = CF_ZOMBIE
3661 is_suspended = CF_SUSPENDED
3662 CODE:
3663 RETVAL = boolSV (coro->flags & ix);
3664 OUTPUT:
3665 RETVAL
3666
3667void
3668throw (Coro::State self, SV *exception = &PL_sv_undef)
3669 PROTOTYPE: $;$
3670 CODE:
3671{
3672 struct coro *current = SvSTATE_current;
3673 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3674 SvREFCNT_dec (*exceptionp);
3675 SvGETMAGIC (exception);
3676 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3677}
3678
3679void
3680api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3681 PROTOTYPE: $;$
3682 C_ARGS: aTHX_ coro, flags
3683
3684SV *
3685has_cctx (Coro::State coro)
3686 PROTOTYPE: $
3687 CODE:
3688 /* maybe manage the running flag differently */
3689 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3690 OUTPUT:
3691 RETVAL
3692
3693int
3694is_traced (Coro::State coro)
3695 PROTOTYPE: $
3696 CODE:
3697 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3698 OUTPUT:
3699 RETVAL
3700
3701UV
3702rss (Coro::State coro)
3703 PROTOTYPE: $
3704 ALIAS:
3705 usecount = 1
3706 CODE:
3707 switch (ix)
3708 {
3709 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3710 case 1: RETVAL = coro->usecount; break;
3711 }
3712 OUTPUT:
3713 RETVAL
3714
3715void
3716force_cctx ()
3717 PROTOTYPE:
3718 CODE:
3719 cctx_current->idle_sp = 0;
3720
3721void
3722swap_defsv (Coro::State self)
3723 PROTOTYPE: $
3724 ALIAS:
3725 swap_defav = 1
3726 CODE:
3727 if (!self->slot)
3728 croak ("cannot swap state with coroutine that has no saved state,");
3729 else
3730 {
3731 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3732 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3733
3734 SV *tmp = *src; *src = *dst; *dst = tmp;
3735 }
3736
3737void
3738cancel (Coro::State self)
3739 CODE:
3740 coro_state_destroy (aTHX_ self);
3741
3742SV *
3743enable_times (int enabled = enable_times)
3744 CODE:
3745{
3746 RETVAL = boolSV (enable_times);
3747
3748 if (enabled != enable_times)
3749 {
3750 enable_times = enabled;
3751
3752 coro_times_update ();
3753 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3754 }
3755}
3756 OUTPUT:
3757 RETVAL
3758
3759void
3760times (Coro::State self)
3761 PPCODE:
3762{
3763 struct coro *current = SvSTATE (coro_current);
3764
3765 if (ecb_expect_false (current == self))
3766 {
3767 coro_times_update ();
3768 coro_times_add (SvSTATE (coro_current));
3769 }
3770
3771 EXTEND (SP, 2);
3772 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3773 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3774
3775 if (ecb_expect_false (current == self))
3776 coro_times_sub (SvSTATE (coro_current));
3777}
3778
3779void
3780swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3781 CODE:
3782{
3783 struct coro *current = SvSTATE_current;
3784
3785 if (current == coro)
3786 SWAP_SVS (current);
3787
3788 if (!coro->swap_sv)
3789 coro->swap_sv = newAV ();
3790
3791 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3792 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3793
3794 if (current == coro)
3795 SWAP_SVS (current);
3796}
3797
3798
1131MODULE = Coro::State PACKAGE = Coro 3799MODULE = Coro::State PACKAGE = Coro
1132 3800
1133BOOT: 3801BOOT:
1134{ 3802{
1135 int i; 3803 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3804 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3805 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3806 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3807 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3808 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3809 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3810 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1136 3811
3812 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3813 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3814 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3815 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3816
1137 coro_stash = gv_stashpv ("Coro", TRUE); 3817 coro_stash = gv_stashpv ("Coro", TRUE);
1138 3818
1139 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3819 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1140 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3820 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1141 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3821 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1142 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3822 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1143 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3823 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1144 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3824 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1145
1146 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1147 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1148
1149 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150 coro_ready[i] = newAV ();
1151 3825
1152 { 3826 {
1153 SV *sv = perl_get_sv("Coro::API", 1); 3827 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1154 3828
1155 coroapi.schedule = api_schedule; 3829 coroapi.schedule = api_schedule;
3830 coroapi.schedule_to = api_schedule_to;
1156 coroapi.cede = api_cede; 3831 coroapi.cede = api_cede;
3832 coroapi.cede_notself = api_cede_notself;
1157 coroapi.ready = api_ready; 3833 coroapi.ready = api_ready;
3834 coroapi.is_ready = api_is_ready;
1158 coroapi.nready = &coro_nready; 3835 coroapi.nready = coro_nready;
1159 coroapi.current = coro_current; 3836 coroapi.current = coro_current;
1160 3837
1161 GCoroAPI = &coroapi; 3838 /*GCoroAPI = &coroapi;*/
1162 sv_setiv (sv, (IV)&coroapi); 3839 sv_setiv (sv, (IV)&coroapi);
1163 SvREADONLY_on (sv); 3840 SvREADONLY_on (sv);
1164 } 3841 }
1165} 3842}
1166 3843
3844SV *
3845async (...)
3846 PROTOTYPE: &@
3847 CODE:
3848 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3849 api_ready (aTHX_ RETVAL);
3850 OUTPUT:
3851 RETVAL
3852
3853void
3854_destroy (Coro::State coro)
3855 CODE:
3856 /* used by the manager thread */
3857 coro_state_destroy (aTHX_ coro);
3858
3859void
3860on_destroy (Coro::State coro, SV *cb)
3861 CODE:
3862 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3863
3864void
3865join (...)
3866 CODE:
3867 CORO_EXECUTE_SLF_XS (slf_init_join);
3868
3869void
3870terminate (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3873
3874void
3875cancel (...)
3876 CODE:
3877 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3878
3879int
3880safe_cancel (Coro::State self, ...)
3881 C_ARGS: aTHX_ self, &ST (1), items - 1
3882
3883void
3884schedule (...)
3885 CODE:
3886 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3887
3888void
3889schedule_to (...)
3890 CODE:
3891 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3892
3893void
3894cede_to (...)
3895 CODE:
3896 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3897
3898void
3899cede (...)
3900 CODE:
3901 CORO_EXECUTE_SLF_XS (slf_init_cede);
3902
3903void
3904cede_notself (...)
3905 CODE:
3906 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3907
3908void
3909_set_current (SV *current)
3910 PROTOTYPE: $
3911 CODE:
3912 SvREFCNT_dec (SvRV (coro_current));
3913 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3914
3915void
3916_set_readyhook (SV *hook)
3917 PROTOTYPE: $
3918 CODE:
3919 SvREFCNT_dec (coro_readyhook);
3920 SvGETMAGIC (hook);
3921 if (SvOK (hook))
3922 {
3923 coro_readyhook = newSVsv (hook);
3924 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3925 }
3926 else
3927 {
3928 coro_readyhook = 0;
3929 CORO_READYHOOK = 0;
3930 }
3931
1167int 3932int
1168prio (Coro::State coro, int newprio = 0) 3933prio (Coro::State coro, int newprio = 0)
3934 PROTOTYPE: $;$
1169 ALIAS: 3935 ALIAS:
1170 nice = 1 3936 nice = 1
1171 CODE: 3937 CODE:
1172{ 3938{
1173 RETVAL = coro->prio; 3939 RETVAL = coro->prio;
1174 3940
1175 if (items > 1) 3941 if (items > 1)
1176 { 3942 {
1177 if (ix) 3943 if (ix)
1178 newprio += coro->prio; 3944 newprio = coro->prio - newprio;
1179 3945
1180 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3946 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1181 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3947 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1182 3948
1183 coro->prio = newprio; 3949 coro->prio = newprio;
1184 } 3950 }
1185} 3951}
3952 OUTPUT:
3953 RETVAL
1186 3954
1187void 3955SV *
1188ready (SV *self) 3956ready (SV *self)
1189 PROTOTYPE: $ 3957 PROTOTYPE: $
1190 CODE: 3958 CODE:
1191 api_ready (self); 3959 RETVAL = boolSV (api_ready (aTHX_ self));
3960 OUTPUT:
3961 RETVAL
1192 3962
1193int 3963int
1194nready (...) 3964nready (...)
1195 PROTOTYPE: 3965 PROTOTYPE:
1196 CODE: 3966 CODE:
1197 RETVAL = coro_nready; 3967 RETVAL = coro_nready;
1198 OUTPUT: 3968 OUTPUT:
1199 RETVAL 3969 RETVAL
1200 3970
1201MODULE = Coro::State PACKAGE = Coro::AIO 3971void
3972suspend (Coro::State self)
3973 PROTOTYPE: $
3974 CODE:
3975 self->flags |= CF_SUSPENDED;
3976
3977void
3978resume (Coro::State self)
3979 PROTOTYPE: $
3980 CODE:
3981 self->flags &= ~CF_SUSPENDED;
3982
3983void
3984_pool_handler (...)
3985 CODE:
3986 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3987
3988void
3989async_pool (SV *cv, ...)
3990 PROTOTYPE: &@
3991 PPCODE:
3992{
3993 HV *hv = (HV *)av_pop (av_async_pool);
3994 AV *av = newAV ();
3995 SV *cb = ST (0);
3996 int i;
3997
3998 av_extend (av, items - 2);
3999 for (i = 1; i < items; ++i)
4000 av_push (av, SvREFCNT_inc_NN (ST (i)));
4001
4002 if ((SV *)hv == &PL_sv_undef)
4003 {
4004 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4005 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4006 SvREFCNT_dec (sv);
4007 }
4008
4009 {
4010 struct coro *coro = SvSTATE_hv (hv);
4011
4012 assert (!coro->invoke_cb);
4013 assert (!coro->invoke_av);
4014 coro->invoke_cb = SvREFCNT_inc (cb);
4015 coro->invoke_av = av;
4016 }
4017
4018 api_ready (aTHX_ (SV *)hv);
4019
4020 if (GIMME_V != G_VOID)
4021 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4022 else
4023 SvREFCNT_dec (hv);
4024}
1202 4025
1203SV * 4026SV *
1204_get_state () 4027rouse_cb ()
4028 PROTOTYPE:
1205 CODE: 4029 CODE:
1206{ 4030 RETVAL = coro_new_rouse_cb (aTHX);
1207 struct {
1208 int errorno;
1209 int laststype;
1210 int laststatval;
1211 Stat_t statcache;
1212 } data;
1213
1214 data.errorno = errno;
1215 data.laststype = PL_laststype;
1216 data.laststatval = PL_laststatval;
1217 data.statcache = PL_statcache;
1218
1219 RETVAL = newSVpvn ((char *)&data, sizeof data);
1220}
1221 OUTPUT: 4031 OUTPUT:
1222 RETVAL 4032 RETVAL
1223 4033
1224void 4034void
1225_set_state (char *data_) 4035rouse_wait (...)
4036 PROTOTYPE: ;$
4037 PPCODE:
4038 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4039
4040void
4041on_enter (SV *block)
4042 ALIAS:
4043 on_leave = 1
1226 PROTOTYPE: $ 4044 PROTOTYPE: &
1227 CODE: 4045 CODE:
1228{ 4046{
1229 struct { 4047 struct coro *coro = SvSTATE_current;
4048 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4049
4050 block = s_get_cv_croak (block);
4051
4052 if (!*avp)
4053 *avp = newAV ();
4054
4055 av_push (*avp, SvREFCNT_inc (block));
4056
4057 if (!ix)
4058 on_enterleave_call (aTHX_ block);
4059
4060 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4061 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4062 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4063}
4064
4065
4066MODULE = Coro::State PACKAGE = PerlIO::cede
4067
4068BOOT:
4069 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4070
4071
4072MODULE = Coro::State PACKAGE = Coro::Semaphore
4073
4074SV *
4075new (SV *klass, SV *count = 0)
4076 CODE:
4077{
4078 int semcnt = 1;
4079
4080 if (count)
4081 {
4082 SvGETMAGIC (count);
4083
4084 if (SvOK (count))
4085 semcnt = SvIV (count);
4086 }
4087
4088 RETVAL = sv_bless (
4089 coro_waitarray_new (aTHX_ semcnt),
4090 GvSTASH (CvGV (cv))
4091 );
4092}
4093 OUTPUT:
4094 RETVAL
4095
4096# helper for Coro::Channel and others
4097SV *
4098_alloc (int count)
4099 CODE:
4100 RETVAL = coro_waitarray_new (aTHX_ count);
4101 OUTPUT:
4102 RETVAL
4103
4104SV *
4105count (SV *self)
4106 CODE:
4107 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4108 OUTPUT:
4109 RETVAL
4110
4111void
4112up (SV *self, int adjust = 1)
4113 ALIAS:
4114 adjust = 1
4115 CODE:
4116 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4117
4118void
4119down (...)
4120 CODE:
4121 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4122
4123void
4124wait (...)
4125 CODE:
4126 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4127
4128void
4129try (SV *self)
4130 PPCODE:
4131{
4132 AV *av = (AV *)SvRV (self);
4133 SV *count_sv = AvARRAY (av)[0];
4134 IV count = SvIVX (count_sv);
4135
4136 if (count > 0)
4137 {
4138 --count;
4139 SvIVX (count_sv) = count;
4140 XSRETURN_YES;
4141 }
4142 else
4143 XSRETURN_NO;
4144}
4145
4146void
4147waiters (SV *self)
4148 PPCODE:
4149{
4150 AV *av = (AV *)SvRV (self);
4151 int wcount = AvFILLp (av) + 1 - 1;
4152
4153 if (GIMME_V == G_SCALAR)
4154 XPUSHs (sv_2mortal (newSViv (wcount)));
4155 else
4156 {
1230 int errorno; 4157 int i;
1231 int laststype; 4158 EXTEND (SP, wcount);
1232 int laststatval; 4159 for (i = 1; i <= wcount; ++i)
1233 Stat_t statcache; 4160 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1234 } *data = (void *)data_; 4161 }
1235
1236 errno = data->errorno;
1237 PL_laststype = data->laststype;
1238 PL_laststatval = data->laststatval;
1239 PL_statcache = data->statcache;
1240} 4162}
4163
4164MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4165
4166void
4167_may_delete (SV *sem, int count, unsigned int extra_refs)
4168 PPCODE:
4169{
4170 AV *av = (AV *)SvRV (sem);
4171
4172 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4173 && AvFILLp (av) == 0 /* no waiters, just count */
4174 && SvIV (AvARRAY (av)[0]) == count)
4175 XSRETURN_YES;
4176
4177 XSRETURN_NO;
4178}
4179
4180MODULE = Coro::State PACKAGE = Coro::Signal
4181
4182SV *
4183new (SV *klass)
4184 CODE:
4185 RETVAL = sv_bless (
4186 coro_waitarray_new (aTHX_ 0),
4187 GvSTASH (CvGV (cv))
4188 );
4189 OUTPUT:
4190 RETVAL
4191
4192void
4193wait (...)
4194 CODE:
4195 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4196
4197void
4198broadcast (SV *self)
4199 CODE:
4200{
4201 AV *av = (AV *)SvRV (self);
4202 coro_signal_wake (aTHX_ av, AvFILLp (av));
4203}
4204
4205void
4206send (SV *self)
4207 CODE:
4208{
4209 AV *av = (AV *)SvRV (self);
4210
4211 if (AvFILLp (av))
4212 coro_signal_wake (aTHX_ av, 1);
4213 else
4214 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4215}
4216
4217IV
4218awaited (SV *self)
4219 CODE:
4220 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4221 OUTPUT:
4222 RETVAL
4223
4224
4225MODULE = Coro::State PACKAGE = Coro::AnyEvent
4226
4227BOOT:
4228 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4229
4230void
4231_schedule (...)
4232 CODE:
4233{
4234 static int incede;
4235
4236 api_cede_notself (aTHX);
4237
4238 ++incede;
4239 while (coro_nready >= incede && api_cede (aTHX))
4240 ;
4241
4242 sv_setsv (sv_activity, &PL_sv_undef);
4243 if (coro_nready >= incede)
4244 {
4245 PUSHMARK (SP);
4246 PUTBACK;
4247 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4248 }
4249
4250 --incede;
4251}
4252
4253
4254MODULE = Coro::State PACKAGE = Coro::AIO
4255
4256void
4257_register (char *target, char *proto, SV *req)
4258 CODE:
4259{
4260 SV *req_cv = s_get_cv_croak (req);
4261 /* newXSproto doesn't return the CV on 5.8 */
4262 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4263 sv_setpv ((SV *)slf_cv, proto);
4264 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4265}
4266
4267MODULE = Coro::State PACKAGE = Coro::Select
4268
4269void
4270patch_pp_sselect ()
4271 CODE:
4272 if (!coro_old_pp_sselect)
4273 {
4274 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4275 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4276 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4277 }
4278
4279void
4280unpatch_pp_sselect ()
4281 CODE:
4282 if (coro_old_pp_sselect)
4283 {
4284 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4285 coro_old_pp_sselect = 0;
4286 }
4287

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