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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.440 by root, Sat Feb 22 14:12:45 2014 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
12# ifndef PL_ppaddr 19#define ECB_NO_LIBM 1
13# define PL_ppaddr ppaddr 20#include "ecb.h"
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 21
22#include <stddef.h>
32#include <stdio.h> 23#include <stdio.h>
33#include <errno.h> 24#include <errno.h>
34
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD
37#endif
38
39#ifndef STACKGUARD
40# define STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h> 25#include <assert.h>
45# include <sys/mman.h> 26
46# ifndef MAP_ANONYMOUS 27#ifndef SVs_PADSTALE
47# ifdef MAP_ANON 28# define SVs_PADSTALE 0
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif 29#endif
30
31#ifdef PadARRAY
32# define NEWPADAPI 1
33# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
34#else
35typedef AV PADNAMELIST;
36# if !PERL_VERSION_ATLEAST(5,8,0)
37typedef AV PADLIST;
38typedef AV PAD;
52# endif 39# endif
53# include <limits.h> 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
54# ifndef PAGESIZE 41# define PadlistMAX(pl) AvFILLp (pl)
55# define PAGESIZE pagesize 42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 43# define PadARRAY AvARRAY
57static long pagesize; 44# define PadMAX AvFILLp
45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
46#endif
47
48/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
49/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
50#if PERL_VERSION_ATLEAST(5,19,0)
51# define SVt_BIND SVt_IV
52#endif
53
54#if defined(_WIN32)
55# undef HAS_GETTIMEOFDAY
56# undef setjmp
57# undef longjmp
58# undef _exit
59# define setjmp _setjmp /* deep magic */
58# else 60#else
59# define BOOT_PAGESIZE 61# include <inttypes.h> /* most portable stdint.h */
62#endif
63
64/* the maximum number of idle cctx that will be pooled */
65static int cctx_max_idle = 4;
66
67#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
68# define HAS_SCOPESTACK_NAME 1
69#endif
70
71/* prefer perl internal functions over our own? */
72#ifndef CORO_PREFER_PERL_FUNCTIONS
73# define CORO_PREFER_PERL_FUNCTIONS 0
74#endif
75
76/* The next macros try to return the current stack pointer, in an as
77 * portable way as possible. */
78#if __GNUC__ >= 4
79# define dSTACKLEVEL int stacklevel_dummy
80# define STACKLEVEL __builtin_frame_address (0)
81#else
82# define dSTACKLEVEL volatile void *stacklevel
83# define STACKLEVEL ((void *)&stacklevel)
84#endif
85
86#define IN_DESTRUCT PL_dirty
87
88#include "CoroAPI.h"
89#define GCoroAPI (&coroapi) /* very sneaky */
90
91#ifdef USE_ITHREADS
92# if CORO_PTHREAD
93static void *coro_thx;
60# endif 94# endif
61#endif 95#endif
62 96
63/* The next macro should declare a variable stacklevel that contains and approximation 97#ifdef __linux
64 * to the current C stack pointer. Its property is that it changes with each call 98# include <time.h> /* for timespec */
65 * and should be unique. */ 99# include <syscall.h> /* for SYS_* */
66#define dSTACKLEVEL int stacklevel 100# ifdef SYS_clock_gettime
67#define STACKLEVEL ((void *)&stacklevel) 101# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
68 102# define CORO_CLOCK_MONOTONIC 1
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 103# define CORO_CLOCK_THREAD_CPUTIME_ID 3
70
71#include "CoroAPI.h"
72
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif 104# endif
105#endif
83 106
107static double (*nvtime)(); /* so why doesn't it take void? */
108static void (*u2time)(pTHX_ UV ret[2]);
109
110/* we hijack an hopefully unused CV flag for our purposes */
111#define CVf_SLF 0x4000
112static OP *pp_slf (pTHX);
113static void slf_destroy (pTHX_ struct coro *coro);
114
115static U32 cctx_gen;
116static size_t cctx_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 117static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 118static AV *main_mainstack; /* used to differentiate between $main and others */
119static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 120static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 121static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
122
123static AV *av_destroy; /* destruction queue */
124static SV *sv_manager; /* the manager coro */
125static SV *sv_idle; /* $Coro::idle */
126
127static GV *irsgv; /* $/ */
128static GV *stdoutgv; /* *STDOUT */
129static SV *rv_diehook;
130static SV *rv_warnhook;
131static HV *hv_sig; /* %SIG */
132
133/* async_pool helper stuff */
134static SV *sv_pool_rss;
135static SV *sv_pool_size;
136static SV *sv_async_pool_idle; /* description string */
137static AV *av_async_pool; /* idle pool */
138static SV *sv_Coro; /* class string */
139static CV *cv_pool_handler;
140
141/* Coro::AnyEvent */
142static SV *sv_activity;
143
144/* enable processtime/realtime profiling */
145static char enable_times;
146typedef U32 coro_ts[2];
147static coro_ts time_real, time_cpu;
148static char times_valid;
149
150static struct coro_cctx *cctx_first;
151static int cctx_count, cctx_idle;
152
153enum
154{
155 CC_MAPPED = 0x01,
156 CC_NOREUSE = 0x02, /* throw this away after tracing */
157 CC_TRACE = 0x04,
158 CC_TRACE_SUB = 0x08, /* trace sub calls */
159 CC_TRACE_LINE = 0x10, /* trace each statement */
160 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
161};
88 162
89/* this is a structure representing a c-level coroutine */ 163/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 164typedef struct coro_cctx
165{
91 struct coro_stack *next; 166 struct coro_cctx *next;
92 167
93 /* the stack */ 168 /* the stack */
94 void *sptr; 169 struct coro_stack stack;
95 long ssize; /* positive == mmap, otherwise malloc */
96 170
97 /* cpu state */ 171 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 172 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
173#ifndef NDEBUG
174 JMPENV *idle_te; /* same as idle_sp, but for top_env */
175#endif
99 JMPENV *top_env; 176 JMPENV *top_env;
100 coro_context cctx; 177 coro_context cctx;
101} coro_stack;
102 178
103/* the (fake) coro_stack representing the main program */ 179 U32 gen;
104static coro_stack *main_stack; 180#if CORO_USE_VALGRIND
181 int valgrind_id;
182#endif
183 unsigned char flags;
184} coro_cctx;
185
186static coro_cctx *cctx_current; /* the currently running cctx */
187
188/*****************************************************************************/
189
190static MGVTBL coro_state_vtbl;
191
192enum
193{
194 CF_RUNNING = 0x0001, /* coroutine is running */
195 CF_READY = 0x0002, /* coroutine is ready */
196 CF_NEW = 0x0004, /* has never been switched to */
197 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
198 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
199 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
200};
201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct
204{
205 #define VARx(name,expr,type) type name;
206 #include "state.h"
207} perl_slots;
208
209/* how many context stack entries do we need for perl_slots */
210#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
105 211
106/* this is a structure representing a perl-level coroutine */ 212/* this is a structure representing a perl-level coroutine */
107struct coro { 213struct coro
214{
108 /* the c coroutine allocated to this perl coroutine, if any */ 215 /* the C coroutine allocated to this perl coroutine, if any */
109 coro_stack *stack; 216 coro_cctx *cctx;
110 217
111 /* data associated with this coroutine (initial args) */ 218 /* ready queue */
112 AV *args; 219 struct coro *next_ready;
113 int refcnt;
114 220
115 /* optionally saved, might be zero */ 221 /* state data */
116 AV *defav; 222 struct CoroSLF slf_frame; /* saved slf frame */
117 SV *defsv;
118 SV *errsv;
119
120 /* saved global state not related to stacks */
121 U8 dowarn;
122 I32 in_eval;
123
124 /* the stacks and related info (callchain etc..) */
125 PERL_SI *curstackinfo;
126 AV *curstack;
127 AV *mainstack; 223 AV *mainstack;
128 SV **stack_sp; 224 perl_slots *slot; /* basically the saved sp */
129 OP *op; 225
130 SV **curpad; 226 CV *startcv; /* the CV to execute */
131 AV *comppad; 227 AV *args; /* data associated with this coroutine (initial args) */
132 CV *compcv; 228 int flags; /* CF_ flags */
133 SV **stack_base; 229 HV *hv; /* the perl hash associated with this coro, if any */
134 SV **stack_max; 230
135 SV **tmps_stack; 231 /* statistics */
136 I32 tmps_floor; 232 int usecount; /* number of transfers to this coro */
137 I32 tmps_ix;
138 I32 tmps_max;
139 I32 *markstack;
140 I32 *markstack_ptr;
141 I32 *markstack_max;
142 I32 *scopestack;
143 I32 scopestack_ix;
144 I32 scopestack_max;
145 ANY *savestack;
146 I32 savestack_ix;
147 I32 savestack_max;
148 OP **retstack;
149 I32 retstack_ix;
150 I32 retstack_max;
151 PMOP *curpm;
152 COP *curcop;
153 233
154 /* coro process data */ 234 /* coro process data */
155 int prio; 235 int prio;
236 SV *except; /* exception to be thrown */
237 SV *rouse_cb; /* last rouse callback */
238 AV *on_destroy; /* callbacks or coros to notify on destroy */
239 AV *status; /* the exit status list */
240
241 /* async_pool */
242 SV *saved_deffh;
243 SV *invoke_cb;
244 AV *invoke_av;
245
246 /* on_enter/on_leave */
247 AV *on_enter;
248 AV *on_leave;
249
250 /* swap_sv */
251 AV *swap_sv;
252
253 /* times */
254 coro_ts t_cpu, t_real;
255
256 /* linked list */
257 struct coro *next, *prev;
156}; 258};
157 259
158typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
160 262
263/* the following variables are effectively part of the perl context */
264/* and get copied between struct coro and these variables */
265/* the main reason we don't support windows process emulation */
266static struct CoroSLF slf_frame; /* the current slf frame */
267
268/** Coro ********************************************************************/
269
270#define CORO_PRIO_MAX 3
271#define CORO_PRIO_HIGH 1
272#define CORO_PRIO_NORMAL 0
273#define CORO_PRIO_LOW -1
274#define CORO_PRIO_IDLE -3
275#define CORO_PRIO_MIN -4
276
277/* for Coro.pm */
278static SV *coro_current;
279static SV *coro_readyhook;
280static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
281static CV *cv_coro_run;
282static struct coro *coro_first;
283#define coro_nready coroapi.nready
284
285/** JIT *********************************************************************/
286
287#if CORO_JIT
288 /* APPLE doesn't have mmap though */
289 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
290 #ifndef CORO_JIT_TYPE
291 #if ECB_AMD64 && CORO_JIT_UNIXY
292 #define CORO_JIT_TYPE "amd64-unix"
293 #elif __i386 && CORO_JIT_UNIXY
294 #define CORO_JIT_TYPE "x86-unix"
295 #endif
296 #endif
297#endif
298
299#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
300 #undef CORO_JIT
301#endif
302
303#if CORO_JIT
304 typedef void (*load_save_perl_slots_type)(perl_slots *);
305 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
306#endif
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
311static SV *coro_select_select;
312
313/* horrible hack, but if it works... */
161static AV * 314static OP *
315coro_pp_sselect (pTHX)
316{
317 dSP;
318 PUSHMARK (SP - 4); /* fake argument list */
319 XPUSHs (coro_select_select);
320 PUTBACK;
321
322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
323 PL_op->op_flags |= OPf_STACKED;
324 PL_op->op_private = 0;
325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332ecb_inline void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342ecb_inline double
343coro_nvtime (void)
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351ecb_inline void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360ecb_inline void
361time_init (pTHX)
362{
363 SV **svp;
364
365 require_pv ("Time/HiRes.pm");
366
367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
368
369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
379
380/** lowlevel stuff **********************************************************/
381
382static SV * ecb_noinline
383coro_get_sv (pTHX_ const char *name, int create)
384{
385#if PERL_VERSION_ATLEAST (5,10,0)
386 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
387 get_sv (name, create);
388#endif
389 return get_sv (name, create);
390}
391
392static AV * ecb_noinline
393coro_get_av (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_av (name, create);
398#endif
399 return get_av (name, create);
400}
401
402static HV * ecb_noinline
403coro_get_hv (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_hv (name, create);
408#endif
409 return get_hv (name, create);
410}
411
412ecb_inline void
413coro_times_update (void)
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435ecb_inline void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447ecb_inline void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (ecb_expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478ecb_inline MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (ecb_expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493ecb_inline struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (aTHX_ coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
517ecb_inline PADLIST *
162coro_clone_padlist (pTHX_ CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
163{ 519{
164 AV *padlist = CvPADLIST (cv); 520 PADLIST *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
166 524
167 newpadlist = newAV (); 525#if NEWPADAPI
526
527 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
528 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
529 while (!PadlistARRAY (padlist)[off - 1])
530 --off;
531
532 Perl_pad_push (aTHX_ padlist, off);
533
534 newpad = PadlistARRAY (padlist)[off];
535 PadlistARRAY (padlist)[off] = 0;
536
537#else
538
539#if PERL_VERSION_ATLEAST (5,10,0)
540 Perl_pad_push (aTHX_ padlist, off);
541#else
542 Perl_pad_push (aTHX_ padlist, off, 1);
543#endif
544
545 newpad = PadlistARRAY (padlist)[off];
546 PadlistMAX (padlist) = off - 1;
547
548#endif
549
550 newPADLIST (newpadlist);
551#if !PERL_VERSION_ATLEAST(5,15,3)
552 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
168 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 554#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist);
176 555
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 556 /* Already extended to 2 elements by newPADLIST. */
178 av_store (newpadlist, 1, (SV *)newpad); 557 PadlistMAX (newpadlist) = 1;
558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
559 PadlistARRAY (newpadlist)[1] = newpad;
179 560
180 return newpadlist; 561 return newpadlist;
181} 562}
182 563
183static void 564ecb_inline void
184free_padlist (pTHX_ AV *padlist) 565free_padlist (pTHX_ PADLIST *padlist)
185{ 566{
186 /* may be during global destruction */ 567 /* may be during global destruction */
187 if (SvREFCNT (padlist)) 568 if (!IN_DESTRUCT)
188 { 569 {
189 I32 i = AvFILLp (padlist); 570 I32 i = PadlistMAX (padlist);
190 while (i >= 0) 571
572 while (i > 0) /* special-case index 0 */
191 { 573 {
192 SV **svp = av_fetch (padlist, i--, FALSE); 574 /* we try to be extra-careful here */
575 PAD *pad = PadlistARRAY (padlist)[i--];
576
193 if (svp) 577 if (pad)
194 { 578 {
195 SV *sv; 579 I32 j = PadMAX (pad);
196 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 580
581 while (j >= 0)
197 SvREFCNT_dec (sv); 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
198 583
584 PadMAX (pad) = -1;
199 SvREFCNT_dec (*svp); 585 SvREFCNT_dec (pad);
200 } 586 }
201 } 587 }
202 588
589 SvREFCNT_dec (PadlistNAMES (padlist));
590
591#if NEWPADAPI
592 Safefree (PadlistARRAY (padlist));
593 Safefree (padlist);
594#else
595 AvFILLp (padlist) = -1;
596 AvREAL_off (padlist);
203 SvREFCNT_dec ((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
204 } 599 }
205} 600}
206 601
207static int 602static int
208coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
209{ 604{
210 AV *padlist; 605 PADLIST *padlist;
211 AV *av = (AV *)mg->mg_obj; 606 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
607 size_t len = *(size_t *)mg->mg_ptr;
212 608
213 /* casting is fun. */ 609 /* perl manages to free our internal AV and _then_ call us */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
215 free_padlist (aTHX_ padlist); 614 free_padlist (aTHX_ padlists[len]);
216
217 SvREFCNT_dec (av);
218 615
219 return 0; 616 return 0;
220} 617}
221 618
222#define PERL_MAGIC_coro PERL_MAGIC_ext 619static MGVTBL coro_cv_vtbl = {
223 620 0, 0, 0, 0,
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 621 coro_cv_free
622};
225 623
226/* the next two functions merely cache the padlists */ 624/* the next two functions merely cache the padlists */
227static void 625ecb_inline void
228get_padlist (pTHX_ CV *cv) 626get_padlist (pTHX_ CV *cv)
229{ 627{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 628 MAGIC *mg = CORO_MAGIC_cv (cv);
629 size_t *lenp;
231 630
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
234 else 633 else
235 { 634 {
236#if 0 635#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 638 CV *cp = Perl_cv_clone (aTHX_ cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 639 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 640 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 641 SvREFCNT_dec (cp);
242#else 642#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
244#endif 644#endif
245 } 645 }
246} 646}
247 647
248static void 648ecb_inline void
249put_padlist (pTHX_ CV *cv) 649put_padlist (pTHX_ CV *cv)
250{ 650{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 651 MAGIC *mg = CORO_MAGIC_cv (cv);
252 652
253 if (!mg) 653 if (ecb_expect_false (!mg))
254 {
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 } 654 {
655 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
656 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
657 mg->mg_len = 1; /* so mg_free frees mg_ptr */
658 }
659 else
660 Renew (mg->mg_ptr,
661 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
662 char);
260 663
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
262} 665}
263 666
264#define SB do { 667/** load & save, init *******************************************************/
265#define SE } while (0)
266 668
267#define LOAD(state) load_state(aTHX_ (state)); 669ecb_inline void
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 670swap_sv (SV *a, SV *b)
671{
672 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
673 SV tmp;
269 674
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 675 /* swap sv_any */
676 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
271 677
678 /* swap sv_flags */
679 SvFLAGS (&tmp) = SvFLAGS (a);
680 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
681 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
682
683#if PERL_VERSION_ATLEAST (5,10,0)
684 /* perl 5.10 and later complicates this _quite_ a bit, but it also
685 * is much faster, so no quarrels here. alternatively, we could
686 * sv_upgrade to avoid this.
687 */
688 {
689 /* swap sv_u */
690 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
691
692 /* if SvANY points to the head, we need to adjust the pointers,
693 * as the pointer for a still points to b, and maybe vice versa.
694 */
695 #define svany_in_head(type) \
696 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
697
698 if (svany_in_head (SvTYPE (a)))
699 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
700
701 if (svany_in_head (SvTYPE (b)))
702 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
703 }
704#endif
705}
706
707/* swap sv heads, at least logically */
272static void 708static void
709swap_svs (pTHX_ Coro__State c)
710{
711 int i;
712
713 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
714 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
715}
716
717#define SWAP_SVS(coro) \
718 if (ecb_expect_false ((coro)->swap_sv)) \
719 swap_svs (aTHX_ (coro))
720
721static void
722on_enterleave_call (pTHX_ SV *cb);
723
724static void
273load_state(pTHX_ Coro__State c) 725load_perl (pTHX_ Coro__State c)
274{ 726{
275 PL_dowarn = c->dowarn; 727 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 728 c->slot = 0;
277 729
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 730 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 731
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 732#if CORO_JIT
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 733 load_perl_slots (slot);
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 734#else
735 #define VARx(name,expr,type) expr = slot->name;
736 #include "state.h"
737#endif
312 738
313 { 739 {
314 dSP; 740 dSP;
741
315 CV *cv; 742 CV *cv;
316 743
317 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
319 { 746 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 748 CvDEPTH (cv) = PTR2IV (POPs);
326 } 749 CvPADLIST (cv) = (PADLIST *)POPs;
327
328 ++CvDEPTH(cv);
329 } 750 }
330 751
331 PUTBACK; 752 PUTBACK;
332 } 753 }
333}
334 754
755 slf_frame = c->slf_frame;
756 CORO_THROW = c->except;
757
758 if (ecb_expect_false (enable_times))
759 {
760 if (ecb_expect_false (!times_valid))
761 coro_times_update ();
762
763 coro_times_sub (c);
764 }
765
766 if (ecb_expect_false (c->on_enter))
767 {
768 int i;
769
770 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
771 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
772 }
773
774 SWAP_SVS (c);
775}
776
335static void 777static void
336save_state(pTHX_ Coro__State c, int flags) 778save_perl (pTHX_ Coro__State c)
337{ 779{
780 SWAP_SVS (c);
781
782 if (ecb_expect_false (c->on_leave))
783 {
784 int i;
785
786 for (i = AvFILLp (c->on_leave); i >= 0; --i)
787 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
788 }
789
790 times_valid = 0;
791
792 if (ecb_expect_false (enable_times))
793 {
794 coro_times_update (); times_valid = 1;
795 coro_times_add (c);
796 }
797
798 c->except = CORO_THROW;
799 c->slf_frame = slf_frame;
800
338 { 801 {
339 dSP; 802 dSP;
340 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
342 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
344 /* 807 /*
345 * the worst thing you can imagine happens first - we have to save 808 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 809 * (and reinitialize) all cv's in the whole callchain :(
347 */ 810 */
348 811
349 PUSHs (Nullsv); 812 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
351 for (;;) 814 for (;;)
352 { 815 {
353 while (cxix >= 0) 816 while (ecb_expect_true (cxix >= 0))
354 { 817 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
356 819
357 if (CxTYPE(cx) == CXt_SUB) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
358 { 821 {
359 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
823
360 if (CvDEPTH(cv)) 824 if (ecb_expect_true (CvDEPTH (cv)))
361 { 825 {
362 EXTEND (SP, CvDEPTH(cv)*2); 826 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
373 830
831 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 832 get_padlist (aTHX_ cv);
375 } 833 }
376 } 834 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 835 }
386 836
387 if (top_si->si_type == PERLSI_MAIN) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
388 break; 838 break;
389 839
390 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
393 } 843 }
394 844
395 PUTBACK; 845 PUTBACK;
396 } 846 }
397 847
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 848 /* allocate some space on the context stack for our purposes */
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 850 {
851 unsigned int i;
401 852
402 c->dowarn = PL_dowarn; 853 for (i = 0; i < SLOT_COUNT; ++i)
403 c->in_eval = PL_in_eval; 854 CXINC;
404 855
405 c->curstackinfo = PL_curstackinfo; 856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
406 c->curstack = PL_curstack; 857 }
858
407 c->mainstack = PL_mainstack; 859 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp; 860
409 c->op = PL_op; 861 {
410 c->curpad = PL_curpad; 862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411 c->comppad = PL_comppad; 863
412 c->compcv = PL_compcv; 864#if CORO_JIT
413 c->stack_base = PL_stack_base; 865 save_perl_slots (slot);
414 c->stack_max = PL_stack_max; 866#else
415 c->tmps_stack = PL_tmps_stack; 867 #define VARx(name,expr,type) slot->name = expr;
416 c->tmps_floor = PL_tmps_floor; 868 #include "state.h"
417 c->tmps_ix = PL_tmps_ix;
418 c->tmps_max = PL_tmps_max;
419 c->markstack = PL_markstack;
420 c->markstack_ptr = PL_markstack_ptr;
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif 869#endif
433 c->curpm = PL_curpm; 870 }
434 c->curcop = PL_curcop;
435} 871}
436 872
437/* 873/*
438 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
439 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
440 * on the (sometimes correct) assumption that coroutines do 876 * on the (sometimes correct) assumption that coroutines do
441 * not usually need a lot of stackspace. 877 * not usually need a lot of stackspace.
442 */ 878 */
879#if CORO_PREFER_PERL_FUNCTIONS
880# define coro_init_stacks(thx) init_stacks ()
881#else
443static void 882static void
444coro_init_stacks (pTHX) 883coro_init_stacks (pTHX)
445{ 884{
446 LOCK; 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
447
448 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
450 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
451 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452 889
453 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
454 PL_stack_sp = PL_stack_base; 891 PL_stack_sp = PL_stack_base;
455 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 892 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456 893
457 New(50,PL_tmps_stack,96,SV*); 894 New(50,PL_tmps_stack,32,SV*);
458 PL_tmps_floor = -1; 895 PL_tmps_floor = -1;
459 PL_tmps_ix = -1; 896 PL_tmps_ix = -1;
460 PL_tmps_max = 96; 897 PL_tmps_max = 32;
461 898
462 New(54,PL_markstack,16,I32); 899 New(54,PL_markstack,16,I32);
463 PL_markstack_ptr = PL_markstack; 900 PL_markstack_ptr = PL_markstack;
464 PL_markstack_max = PL_markstack + 16; 901 PL_markstack_max = PL_markstack + 16;
465 902
466#ifdef SET_MARK_OFFSET 903#ifdef SET_MARK_OFFSET
467 SET_MARK_OFFSET; 904 SET_MARK_OFFSET;
468#endif 905#endif
469 906
470 New(54,PL_scopestack,16,I32); 907 New(54,PL_scopestack,8,I32);
471 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
472 PL_scopestack_max = 16; 909 PL_scopestack_max = 8;
910#if HAS_SCOPESTACK_NAME
911 New(54,PL_scopestack_name,8,const char*);
912#endif
473 913
474 New(54,PL_savestack,96,ANY); 914 New(54,PL_savestack,24,ANY);
475 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
476 PL_savestack_max = 96; 916 PL_savestack_max = 24;
477 917
478#if PERL_VERSION < 9 918#if !PERL_VERSION_ATLEAST (5,10,0)
479 New(54,PL_retstack,8,OP*); 919 New(54,PL_retstack,4,OP*);
480 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
481 PL_retstack_max = 8; 921 PL_retstack_max = 4;
482#endif 922#endif
483
484 UNLOCK;
485} 923}
924#endif
486 925
487/* 926/*
488 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
489 */ 928 */
490static void 929static void
491destroy_stacks(pTHX) 930coro_destruct_stacks (pTHX)
492{ 931{
493 if (!IN_DESTRUCT)
494 {
495 /* is this ugly, I ask? */
496 LEAVE_SCOPE (0);
497
498 /* sure it is, but more important: is it correct?? :/ */
499 FREETMPS;
500
501 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
502 }
503
504 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
505 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
506 934
507 while (PL_curstackinfo) 935 while (PL_curstackinfo)
508 { 936 {
509 PERL_SI *p = PL_curstackinfo->si_prev; 937 PERL_SI *p = PL_curstackinfo->si_prev;
510 938
511 { /*D*//*remove*/
512 dSP;
513 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514 PUTBACK; /* possibly superfluous */
515 }
516
517 if (!IN_DESTRUCT) 939 if (!IN_DESTRUCT)
518 {
519 dounwind (-1);/*D*//*remove*/
520 SvREFCNT_dec (PL_curstackinfo->si_stack); 940 SvREFCNT_dec (PL_curstackinfo->si_stack);
521 }
522 941
523 Safefree (PL_curstackinfo->si_cxstack); 942 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree (PL_curstackinfo); 943 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 944 PL_curstackinfo = p;
526 } 945 }
527 946
528 Safefree (PL_tmps_stack); 947 Safefree (PL_tmps_stack);
529 Safefree (PL_markstack); 948 Safefree (PL_markstack);
530 Safefree (PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
531 Safefree (PL_savestack); 953 Safefree (PL_savestack);
532#if PERL_VERSION < 9 954#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree (PL_retstack); 955 Safefree (PL_retstack);
534#endif 956#endif
535} 957}
536 958
959#define CORO_RSS \
960 rss += sizeof (SYM (curstackinfo)); \
961 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
962 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
963 rss += SYM (tmps_max) * sizeof (SV *); \
964 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
965 rss += SYM (scopestack_max) * sizeof (I32); \
966 rss += SYM (savestack_max) * sizeof (ANY);
967
968static size_t
969coro_rss (pTHX_ struct coro *coro)
970{
971 size_t rss = sizeof (*coro);
972
973 if (coro->mainstack)
974 {
975 if (coro->flags & CF_RUNNING)
976 {
977 #define SYM(sym) PL_ ## sym
978 CORO_RSS;
979 #undef SYM
980 }
981 else
982 {
983 #define SYM(sym) coro->slot->sym
984 CORO_RSS;
985 #undef SYM
986 }
987 }
988
989 return rss;
990}
991
992/** coroutine stack handling ************************************************/
993
994static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
996static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
997
998/* apparently < 5.8.8 */
999#ifndef MgPV_nolen_const
1000#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1001 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1002 (const char*)(mg)->mg_ptr)
1003#endif
1004
1005/*
1006 * This overrides the default magic get method of %SIG elements.
1007 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1008 * and instead of trying to save and restore the hash elements (extremely slow),
1009 * we just provide our own readback here.
1010 */
1011static int ecb_cold
1012coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *ssv;
1026
1027 if (!*svp)
1028 ssv = &PL_sv_undef;
1029 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1030 ssv = sv_2mortal (newRV_inc (*svp));
1031 else
1032 ssv = *svp;
1033
1034 sv_setsv (sv, ssv);
1035 return 0;
1036 }
1037 }
1038
1039 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1040}
1041
1042static int ecb_cold
1043coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1044{
1045 const char *s = MgPV_nolen_const (mg);
1046
1047 if (*s == '_')
1048 {
1049 SV **svp = 0;
1050
1051 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1052 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1053
1054 if (svp)
1055 {
1056 SV *old = *svp;
1057 *svp = 0;
1058 SvREFCNT_dec (old);
1059 return 0;
1060 }
1061 }
1062
1063 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1064}
1065
1066static int ecb_cold
1067coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1068{
1069 const char *s = MgPV_nolen_const (mg);
1070
1071 if (*s == '_')
1072 {
1073 SV **svp = 0;
1074
1075 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1076 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1077
1078 if (svp)
1079 {
1080 SV *old = *svp;
1081 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1082 SvREFCNT_dec (old);
1083 return 0;
1084 }
1085 }
1086
1087 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1088}
1089
1090static void
1091prepare_nop (pTHX_ struct coro_transfer_args *ta)
1092{
1093 /* kind of mega-hacky, but works */
1094 ta->next = ta->prev = (struct coro *)ta;
1095}
1096
537static void 1097static int
538setup_coro (struct coro *coro) 1098slf_check_nop (pTHX_ struct CoroSLF *frame)
1099{
1100 return 0;
1101}
1102
1103static int
1104slf_check_repeat (pTHX_ struct CoroSLF *frame)
1105{
1106 return 1;
1107}
1108
1109static UNOP init_perl_op;
1110
1111ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1112init_perl (pTHX_ struct coro *coro)
539{ 1113{
540 /* 1114 /*
541 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
542 */ 1116 */
1117 coro_init_stacks (aTHX);
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 PL_curcop = &PL_compiling;
1121 PL_in_eval = EVAL_NULL;
1122 PL_comppad = 0;
1123 PL_comppad_name = 0;
1124 PL_comppad_name_fill = 0;
1125 PL_comppad_name_floor = 0;
1126 PL_curpm = 0;
1127 PL_curpad = 0;
1128 PL_localizing = 0;
1129 PL_restartop = 0;
1130#if PERL_VERSION_ATLEAST (5,10,0)
1131 PL_parser = 0;
1132#endif
1133 PL_hints = 0;
1134
1135 /* recreate the die/warn hooks */
1136 PL_diehook = SvREFCNT_inc (rv_diehook);
1137 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1138
1139 GvSV (PL_defgv) = newSV (0);
1140 GvAV (PL_defgv) = coro->args; coro->args = 0;
1141 GvSV (PL_errgv) = newSV (0);
1142 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1143 GvHV (PL_hintgv) = 0;
1144 PL_rs = newSVsv (GvSV (irsgv));
1145 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1146
1147 {
1148 dSP;
1149 UNOP myop;
1150
1151 Zero (&myop, 1, UNOP);
1152 myop.op_next = Nullop;
1153 myop.op_type = OP_ENTERSUB;
1154 myop.op_flags = OPf_WANT_VOID;
1155
1156 PUSHMARK (SP);
1157 PUSHs ((SV *)coro->startcv);
1158 PUTBACK;
1159 PL_op = (OP *)&myop;
1160 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1161 }
1162
1163 /* this newly created coroutine might be run on an existing cctx which most
1164 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1165 */
1166 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1167 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1168 slf_frame.destroy = 0;
1169
1170 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1171 init_perl_op.op_next = PL_op;
1172 init_perl_op.op_type = OP_ENTERSUB;
1173 init_perl_op.op_ppaddr = pp_slf;
1174 /* no flags etc. required, as an init function won't be called */
1175
1176 PL_op = (OP *)&init_perl_op;
1177
1178 /* copy throw, in case it was set before init_perl */
1179 CORO_THROW = coro->except;
1180
1181 SWAP_SVS (coro);
1182
1183 if (ecb_expect_false (enable_times))
1184 {
1185 coro_times_update ();
1186 coro_times_sub (coro);
1187 }
1188}
1189
1190static void
1191coro_unwind_stacks (pTHX)
1192{
1193 if (!IN_DESTRUCT)
1194 {
1195 /* restore all saved variables and stuff */
1196 LEAVE_SCOPE (0);
1197 assert (PL_tmps_floor == -1);
1198
1199 /* free all temporaries */
1200 FREETMPS;
1201 assert (PL_tmps_ix == -1);
1202
1203 /* unwind all extra stacks */
1204 POPSTACK_TO (PL_mainstack);
1205
1206 /* unwind main stack */
1207 dounwind (-1);
1208 }
1209}
1210
1211static void
1212destroy_perl (pTHX_ struct coro *coro)
1213{
1214 SV *svf [9];
1215
1216 {
1217 SV *old_current = SvRV (coro_current);
1218 struct coro *current = SvSTATE (old_current);
1219
1220 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1221
1222 save_perl (aTHX_ current);
1223
1224 /* this will cause transfer_check to croak on block*/
1225 SvRV_set (coro_current, (SV *)coro->hv);
1226
1227 load_perl (aTHX_ coro);
1228
1229 coro_unwind_stacks (aTHX);
1230
1231 /* restore swapped sv's */
1232 SWAP_SVS (coro);
1233
1234 coro_destruct_stacks (aTHX);
1235
1236 /* now save some sv's to be free'd later */
1237 svf [0] = GvSV (PL_defgv);
1238 svf [1] = (SV *)GvAV (PL_defgv);
1239 svf [2] = GvSV (PL_errgv);
1240 svf [3] = (SV *)PL_defoutgv;
1241 svf [4] = PL_rs;
1242 svf [5] = GvSV (irsgv);
1243 svf [6] = (SV *)GvHV (PL_hintgv);
1244 svf [7] = PL_diehook;
1245 svf [8] = PL_warnhook;
1246 assert (9 == sizeof (svf) / sizeof (*svf));
1247
1248 SvRV_set (coro_current, old_current);
1249
1250 load_perl (aTHX_ current);
1251 }
1252
1253 {
1254 unsigned int i;
1255
1256 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1257 SvREFCNT_dec (svf [i]);
1258
1259 SvREFCNT_dec (coro->saved_deffh);
1260 SvREFCNT_dec (coro->rouse_cb);
1261 SvREFCNT_dec (coro->invoke_cb);
1262 SvREFCNT_dec (coro->invoke_av);
1263 }
1264}
1265
1266ecb_inline void
1267free_coro_mortal (pTHX)
1268{
1269 if (ecb_expect_true (coro_mortal))
1270 {
1271 SvREFCNT_dec ((SV *)coro_mortal);
1272 coro_mortal = 0;
1273 }
1274}
1275
1276static int
1277runops_trace (pTHX)
1278{
1279 COP *oldcop = 0;
1280 int oldcxix = -2;
1281
1282 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1283 {
1284 PERL_ASYNC_CHECK ();
1285
1286 if (cctx_current->flags & CC_TRACE_ALL)
1287 {
1288 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1289 {
1290 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1291 SV **bot, **top;
1292 AV *av = newAV (); /* return values */
1293 SV **cb;
1294 dSP;
1295
1296 GV *gv = CvGV (cx->blk_sub.cv);
1297 SV *fullname = sv_2mortal (newSV (0));
1298 if (isGV (gv))
1299 gv_efullname3 (fullname, gv, 0);
1300
1301 bot = PL_stack_base + cx->blk_oldsp + 1;
1302 top = cx->blk_gimme == G_ARRAY ? SP + 1
1303 : cx->blk_gimme == G_SCALAR ? bot + 1
1304 : bot;
1305
1306 av_extend (av, top - bot);
1307 while (bot < top)
1308 av_push (av, SvREFCNT_inc_NN (*bot++));
1309
1310 PL_runops = RUNOPS_DEFAULT;
1311 ENTER;
1312 SAVETMPS;
1313 EXTEND (SP, 3);
1314 PUSHMARK (SP);
1315 PUSHs (&PL_sv_no);
1316 PUSHs (fullname);
1317 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1318 PUTBACK;
1319 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1320 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1321 SPAGAIN;
1322 FREETMPS;
1323 LEAVE;
1324 PL_runops = runops_trace;
1325 }
1326
1327 if (oldcop != PL_curcop)
1328 {
1329 oldcop = PL_curcop;
1330
1331 if (PL_curcop != &PL_compiling)
1332 {
1333 SV **cb;
1334
1335 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1336 {
1337 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1338
1339 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1340 {
1341 dSP;
1342 GV *gv = CvGV (cx->blk_sub.cv);
1343 SV *fullname = sv_2mortal (newSV (0));
1344
1345 if (isGV (gv))
1346 gv_efullname3 (fullname, gv, 0);
1347
1348 PL_runops = RUNOPS_DEFAULT;
1349 ENTER;
1350 SAVETMPS;
1351 EXTEND (SP, 3);
1352 PUSHMARK (SP);
1353 PUSHs (&PL_sv_yes);
1354 PUSHs (fullname);
1355 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1356 PUTBACK;
1357 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1358 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1359 SPAGAIN;
1360 FREETMPS;
1361 LEAVE;
1362 PL_runops = runops_trace;
1363 }
1364
1365 oldcxix = cxstack_ix;
1366 }
1367
1368 if (cctx_current->flags & CC_TRACE_LINE)
1369 {
1370 dSP;
1371
1372 PL_runops = RUNOPS_DEFAULT;
1373 ENTER;
1374 SAVETMPS;
1375 EXTEND (SP, 3);
1376 PL_runops = RUNOPS_DEFAULT;
1377 PUSHMARK (SP);
1378 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1379 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1380 PUTBACK;
1381 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1382 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1383 SPAGAIN;
1384 FREETMPS;
1385 LEAVE;
1386 PL_runops = runops_trace;
1387 }
1388 }
1389 }
1390 }
1391 }
1392
1393 TAINT_NOT;
1394 return 0;
1395}
1396
1397static struct CoroSLF cctx_ssl_frame;
1398
1399static void
1400slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1401{
1402 ta->prev = 0;
1403}
1404
1405static int
1406slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1407{
1408 *frame = cctx_ssl_frame;
1409
1410 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1411}
1412
1413/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1414static void ecb_noinline
1415cctx_prepare (pTHX)
1416{
1417 PL_top_env = &PL_start_env;
1418
1419 if (cctx_current->flags & CC_TRACE)
1420 PL_runops = runops_trace;
1421
1422 /* we already must be executing an SLF op, there is no other valid way
1423 * that can lead to creation of a new cctx */
1424 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1425 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1426
1427 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1428 cctx_ssl_frame = slf_frame;
1429
1430 slf_frame.prepare = slf_prepare_set_stacklevel;
1431 slf_frame.check = slf_check_set_stacklevel;
1432}
1433
1434/* the tail of transfer: execute stuff we can only do after a transfer */
1435ecb_inline void
1436transfer_tail (pTHX)
1437{
1438 free_coro_mortal (aTHX);
1439}
1440
1441/* try to exit the same way perl's main function would do */
1442/* we do not bother resetting the environment or other things *7
1443/* that are not, uhm, essential */
1444/* this obviously also doesn't work when perl is embedded */
1445static void ecb_noinline ecb_cold
1446perlish_exit (pTHX)
1447{
1448 int exitstatus = perl_destruct (PL_curinterp);
1449 perl_free (PL_curinterp);
1450 exit (exitstatus);
1451}
1452
1453/*
1454 * this is a _very_ stripped down perl interpreter ;)
1455 */
1456static void
1457cctx_run (void *arg)
1458{
1459#ifdef USE_ITHREADS
1460# if CORO_PTHREAD
1461 PERL_SET_CONTEXT (coro_thx);
1462# endif
1463#endif
1464 {
1465 dTHX;
1466
1467 /* normally we would need to skip the entersub here */
1468 /* not doing so will re-execute it, which is exactly what we want */
1469 /* PL_nop = PL_nop->op_next */
1470
1471 /* inject a fake subroutine call to cctx_init */
1472 cctx_prepare (aTHX);
1473
1474 /* cctx_run is the alternative tail of transfer() */
1475 transfer_tail (aTHX);
1476
1477 /* somebody or something will hit me for both perl_run and PL_restartop */
1478 PL_restartop = PL_op;
1479 perl_run (PL_curinterp);
1480 /*
1481 * Unfortunately, there is no way to get at the return values of the
1482 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1483 * runtime errors here, as this is just a random interpreter, not a thread.
1484 */
1485
1486 /*
1487 * If perl-run returns we assume exit() was being called or the coro
1488 * fell off the end, which seems to be the only valid (non-bug)
1489 * reason for perl_run to return. We try to mimic whatever perl is normally
1490 * doing in that case. YMMV.
1491 */
1492 perlish_exit (aTHX);
1493 }
1494}
1495
1496static coro_cctx *
1497cctx_new (void)
1498{
1499 coro_cctx *cctx;
1500
1501 ++cctx_count;
1502 New (0, cctx, 1, coro_cctx);
1503
1504 cctx->gen = cctx_gen;
1505 cctx->flags = 0;
1506 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1507
1508 return cctx;
1509}
1510
1511/* create a new cctx only suitable as source */
1512static coro_cctx *
1513cctx_new_empty (void)
1514{
1515 coro_cctx *cctx = cctx_new ();
1516
1517 cctx->stack.sptr = 0;
1518 coro_create (&cctx->cctx, 0, 0, 0, 0);
1519
1520 return cctx;
1521}
1522
1523/* create a new cctx suitable as destination/running a perl interpreter */
1524static coro_cctx *
1525cctx_new_run (void)
1526{
1527 coro_cctx *cctx = cctx_new ();
1528
1529 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1530 {
1531 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1532 _exit (EXIT_FAILURE);
1533 }
1534
1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1536
1537 return cctx;
1538}
1539
1540static void
1541cctx_destroy (coro_cctx *cctx)
1542{
1543 if (!cctx)
1544 return;
1545
1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1547
1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
1550
1551 coro_stack_free (&cctx->stack);
1552
1553 Safefree (cctx);
1554}
1555
1556/* wether this cctx should be destructed */
1557#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1558
1559static coro_cctx *
1560cctx_get (pTHX)
1561{
1562 while (ecb_expect_true (cctx_first))
1563 {
1564 coro_cctx *cctx = cctx_first;
1565 cctx_first = cctx->next;
1566 --cctx_idle;
1567
1568 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1569 return cctx;
1570
1571 cctx_destroy (cctx);
1572 }
1573
1574 return cctx_new_run ();
1575}
1576
1577static void
1578cctx_put (coro_cctx *cctx)
1579{
1580 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1581
1582 /* free another cctx if overlimit */
1583 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1584 {
1585 coro_cctx *first = cctx_first;
1586 cctx_first = first->next;
1587 --cctx_idle;
1588
1589 cctx_destroy (first);
1590 }
1591
1592 ++cctx_idle;
1593 cctx->next = cctx_first;
1594 cctx_first = cctx;
1595}
1596
1597/** coroutine switching *****************************************************/
1598
1599static void
1600transfer_check (pTHX_ struct coro *prev, struct coro *next)
1601{
1602 /* TODO: throwing up here is considered harmful */
1603
1604 if (ecb_expect_true (prev != next))
1605 {
1606 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1607 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1608
1609 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1610 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1611
1612#if !PERL_VERSION_ATLEAST (5,10,0)
1613 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1614 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1615#endif
1616 }
1617}
1618
1619/* always use the TRANSFER macro */
1620static void ecb_noinline /* noinline so we have a fixed stackframe */
1621transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1622{
1623 dSTACKLEVEL;
1624
1625 /* sometimes transfer is only called to set idle_sp */
1626 if (ecb_expect_false (!prev))
1627 {
1628 cctx_current->idle_sp = STACKLEVEL;
1629 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1630 }
1631 else if (ecb_expect_true (prev != next))
1632 {
1633 coro_cctx *cctx_prev;
1634
1635 if (ecb_expect_false (prev->flags & CF_NEW))
1636 {
1637 /* create a new empty/source context */
1638 prev->flags &= ~CF_NEW;
1639 prev->flags |= CF_RUNNING;
1640 }
1641
1642 prev->flags &= ~CF_RUNNING;
1643 next->flags |= CF_RUNNING;
1644
1645 /* first get rid of the old state */
1646 save_perl (aTHX_ prev);
1647
1648 if (ecb_expect_false (next->flags & CF_NEW))
1649 {
1650 /* need to start coroutine */
1651 next->flags &= ~CF_NEW;
1652 /* setup coroutine call */
1653 init_perl (aTHX_ next);
1654 }
1655 else
1656 load_perl (aTHX_ next);
1657
1658 /* possibly untie and reuse the cctx */
1659 if (ecb_expect_true (
1660 cctx_current->idle_sp == STACKLEVEL
1661 && !(cctx_current->flags & CC_TRACE)
1662 && !force_cctx
1663 ))
1664 {
1665 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1666 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1667
1668 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1669 /* without this the next cctx_get might destroy the running cctx while still in use */
1670 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1671 if (ecb_expect_true (!next->cctx))
1672 next->cctx = cctx_get (aTHX);
1673
1674 cctx_put (cctx_current);
1675 }
1676 else
1677 prev->cctx = cctx_current;
1678
1679 ++next->usecount;
1680
1681 cctx_prev = cctx_current;
1682 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1683
1684 next->cctx = 0;
1685
1686 if (ecb_expect_false (cctx_prev != cctx_current))
1687 {
1688 cctx_prev->top_env = PL_top_env;
1689 PL_top_env = cctx_current->top_env;
1690 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1691 }
1692
1693 transfer_tail (aTHX);
1694 }
1695}
1696
1697#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1698#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1699
1700/** high level stuff ********************************************************/
1701
1702/* this function is actually Coro, not Coro::State, but we call it from here */
1703/* because it is convenient - but it hasn't been declared yet for that reason */
1704static void
1705coro_call_on_destroy (pTHX_ struct coro *coro);
1706
1707static void
1708coro_state_destroy (pTHX_ struct coro *coro)
1709{
1710 if (coro->flags & CF_ZOMBIE)
1711 return;
1712
1713 slf_destroy (aTHX_ coro);
1714
1715 coro->flags |= CF_ZOMBIE;
1716
1717 if (coro->flags & CF_READY)
1718 {
1719 /* reduce nready, as destroying a ready coro effectively unreadies it */
1720 /* alternative: look through all ready queues and remove the coro */
1721 --coro_nready;
1722 }
1723 else
1724 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1725
1726 if (coro->next) coro->next->prev = coro->prev;
1727 if (coro->prev) coro->prev->next = coro->next;
1728 if (coro == coro_first) coro_first = coro->next;
1729
1730 if (coro->mainstack
1731 && coro->mainstack != main_mainstack
1732 && coro->slot
1733 && !PL_dirty)
1734 destroy_perl (aTHX_ coro);
1735
1736 cctx_destroy (coro->cctx);
1737 SvREFCNT_dec (coro->startcv);
1738 SvREFCNT_dec (coro->args);
1739 SvREFCNT_dec (coro->swap_sv);
1740 SvREFCNT_dec (CORO_THROW);
1741
1742 coro_call_on_destroy (aTHX_ coro);
1743
1744 /* more destruction mayhem in coro_state_free */
1745}
1746
1747static int
1748coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1749{
1750 struct coro *coro = (struct coro *)mg->mg_ptr;
1751 mg->mg_ptr = 0;
1752
1753 coro_state_destroy (aTHX_ coro);
1754 SvREFCNT_dec (coro->on_destroy);
1755 SvREFCNT_dec (coro->status);
1756
1757 Safefree (coro);
1758
1759 return 0;
1760}
1761
1762static int ecb_cold
1763coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1764{
1765 /* called when perl clones the current process the slow way (windows process emulation) */
1766 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1767 mg->mg_ptr = 0;
1768 mg->mg_virtual = 0;
1769
1770 return 0;
1771}
1772
1773static MGVTBL coro_state_vtbl = {
1774 0, 0, 0, 0,
1775 coro_state_free,
1776 0,
1777#ifdef MGf_DUP
1778 coro_state_dup,
1779#else
1780# define MGf_DUP 0
1781#endif
1782};
1783
1784static void
1785prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1786{
1787 ta->prev = SvSTATE (prev_sv);
1788 ta->next = SvSTATE (next_sv);
1789 TRANSFER_CHECK (*ta);
1790}
1791
1792static void
1793api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1794{
1795 struct coro_transfer_args ta;
1796
1797 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1798 TRANSFER (ta, 1);
1799}
1800
1801/** Coro ********************************************************************/
1802
1803ecb_inline void
1804coro_enq (pTHX_ struct coro *coro)
1805{
1806 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1807
1808 SvREFCNT_inc_NN (coro->hv);
1809
1810 coro->next_ready = 0;
1811 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1812 ready [1] = coro;
1813}
1814
1815ecb_inline struct coro *
1816coro_deq (pTHX)
1817{
1818 int prio;
1819
1820 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1821 {
1822 struct coro **ready = coro_ready [prio];
1823
1824 if (ready [0])
1825 {
1826 struct coro *coro = ready [0];
1827 ready [0] = coro->next_ready;
1828 return coro;
1829 }
1830 }
1831
1832 return 0;
1833}
1834
1835static void
1836invoke_sv_ready_hook_helper (void)
1837{
543 dTHX; 1838 dTHX;
544 dSP; 1839 dSP;
545 UNOP myop;
546 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547 1840
548 coro_init_stacks (aTHX); 1841 ENTER;
549 /*PL_curcop = 0;*/ 1842 SAVETMPS;
550 /*PL_in_eval = PL_in_eval;*/ /* inherit */
551 SvREFCNT_dec (GvAV (PL_defgv));
552 GvAV (PL_defgv) = coro->args; coro->args = 0;
553 1843
554 SPAGAIN;
555
556 Zero (&myop, 1, UNOP);
557 myop.op_next = Nullop;
558 myop.op_flags = OPf_WANT_VOID;
559
560 PL_op = (OP *)&myop;
561
562 PUSHMARK(SP); 1844 PUSHMARK (SP);
563 XPUSHs (sub_init);
564 PUTBACK; 1845 PUTBACK;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1846 call_sv (coro_readyhook, G_VOID | G_DISCARD);
566 SPAGAIN;
567 1847
568 ENTER; /* necessary e.g. for dounwind */ 1848 FREETMPS;
1849 LEAVE;
569} 1850}
570 1851
571static void 1852static int
572free_coro_mortal () 1853api_ready (pTHX_ SV *coro_sv)
573{ 1854{
574 if (coro_mortal) 1855 struct coro *coro = SvSTATE (coro_sv);
575 {
576 SvREFCNT_dec (coro_mortal);
577 coro_mortal = 0;
578 }
579}
580 1856
581static void 1857 if (coro->flags & CF_READY)
582coro_run (void *arg)
583{
584 /*
585 * this is a _very_ stripped down perl interpreter ;)
586 */
587 dTHX;
588 int ret;
589
590 UNLOCK;
591
592 PL_top_env = &PL_start_env;
593
594 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
595 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597 /* continue at cctx_init, without entersub */
598 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600 /* somebody will hit me for both perl_run and PL_restartop */
601 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602 printf ("ret %d\n", ret);//D
603
604 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605 abort ();
606}
607
608static coro_stack *
609stack_new ()
610{
611 coro_stack *stack;
612
613 New (0, stack, 1, coro_stack);
614
615#if HAVE_MMAP
616
617 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
618 /* mmap suppsedly does allocate-on-write for us */
619 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620
621 if (stack->sptr == (void *)-1)
622 {
623 perror ("FATAL: unable to mmap stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627# if STACKGUARD
628 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
629# endif
630
631#else
632
633 stack->ssize = STACKSIZE * (long)sizeof (long);
634 New (0, stack->sptr, STACKSIZE, long);
635
636 if (!stack->sptr)
637 {
638 perror (stderr, "FATAL: unable to malloc stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642#endif
643
644 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
645
646 return stack;
647}
648
649static void
650stack_free (coro_stack *stack)
651{
652 if (!stack || stack == main_stack)
653 return; 1858 return 0;
654 1859
655#if HAVE_MMAP 1860 coro->flags |= CF_READY;
656 munmap (stack->sptr, stack->ssize);
657#else
658 Safefree (stack->sptr);
659#endif
660 1861
661 Safefree (stack); 1862 coro_enq (aTHX_ coro);
662}
663 1863
664static coro_stack *stack_first; 1864 if (!coro_nready++)
1865 if (coroapi.readyhook)
1866 coroapi.readyhook ();
665 1867
666static coro_stack * 1868 return 1;
667stack_get () 1869}
668{
669 coro_stack *stack;
670 1870
671 if (stack_first) 1871static int
672 { 1872api_is_ready (pTHX_ SV *coro_sv)
673 stack = stack_first; 1873{
674 stack_first = stack->next; 1874 return !!(SvSTATE (coro_sv)->flags & CF_READY);
675 } 1875}
676 else 1876
1877/* expects to own a reference to next->hv */
1878ecb_inline void
1879prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1880{
1881 SV *prev_sv = SvRV (coro_current);
1882
1883 ta->prev = SvSTATE_hv (prev_sv);
1884 ta->next = next;
1885
1886 TRANSFER_CHECK (*ta);
1887
1888 SvRV_set (coro_current, (SV *)next->hv);
1889
1890 free_coro_mortal (aTHX);
1891 coro_mortal = prev_sv;
1892}
1893
1894static void
1895prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1896{
1897 for (;;)
677 { 1898 {
678 stack = stack_new (); 1899 struct coro *next = coro_deq (aTHX);
679 PL_op = PL_op->op_next;
680 }
681 1900
682 return stack; 1901 if (ecb_expect_true (next))
683}
684
685static void
686stack_put (coro_stack *stack)
687{
688 stack->next = stack_first;
689 stack_first = stack;
690}
691
692/* never call directly, always through the coro_state_transfer global variable */
693static void
694transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
695{
696 dSTACKLEVEL;
697
698 /* sometimes transfer is only called to set idle_sp */
699 if (flags == TRANSFER_SET_STACKLEVEL)
700 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
701 else if (prev != next)
702 {
703 coro_stack *prev__stack;
704
705 LOCK;
706
707 if (next->mainstack)
708 { 1902 {
709 /* coroutine already started */ 1903 /* cannot transfer to destroyed coros, skip and look for next */
710 SAVE (prev, flags); 1904 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
711 LOAD (next); 1905 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1906 else
1907 {
1908 next->flags &= ~CF_READY;
1909 --coro_nready;
1910
1911 prepare_schedule_to (aTHX_ ta, next);
1912 break;
1913 }
712 } 1914 }
713 else 1915 else
714 { 1916 {
715 /* need to start coroutine */ 1917 /* nothing to schedule: call the idle handler */
716 /* first get rid of the old state */ 1918 if (SvROK (sv_idle)
717 SAVE (prev, -1); 1919 && SvOBJECT (SvRV (sv_idle)))
718 /* setup coroutine call */ 1920 {
719 setup_coro (next); 1921 if (SvRV (sv_idle) == SvRV (coro_current))
720 /* need a stack */ 1922 {
721 next->stack = 0; 1923 require_pv ("Carp");
1924
1925 {
1926 dSP;
1927
1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1933 PUTBACK;
1934 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1935
1936 FREETMPS;
1937 LEAVE;
1938 }
1939 }
1940
1941 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1942 api_ready (aTHX_ SvRV (sv_idle));
1943 --coro_nready;
1944 }
1945 else
1946 {
1947 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1948 dSP;
1949
1950 ENTER;
1951 SAVETMPS;
1952
1953 PUSHMARK (SP);
1954 PUTBACK;
1955 call_sv (sv_idle, G_VOID | G_DISCARD);
1956
1957 FREETMPS;
1958 LEAVE;
1959 }
722 } 1960 }
1961 }
1962}
723 1963
724 prev__stack = prev->stack; 1964ecb_inline void
1965prepare_cede (pTHX_ struct coro_transfer_args *ta)
1966{
1967 api_ready (aTHX_ coro_current);
1968 prepare_schedule (aTHX_ ta);
1969}
725 1970
726 /* possibly "free" the stack */ 1971ecb_inline void
727 if (prev__stack->idle_sp == STACKLEVEL) 1972prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV *prev = SvRV (coro_current);
1975
1976 if (coro_nready)
1977 {
1978 prepare_schedule (aTHX_ ta);
1979 api_ready (aTHX_ prev);
1980 }
1981 else
1982 prepare_nop (aTHX_ ta);
1983}
1984
1985static void
1986api_schedule (pTHX)
1987{
1988 struct coro_transfer_args ta;
1989
1990 prepare_schedule (aTHX_ &ta);
1991 TRANSFER (ta, 1);
1992}
1993
1994static void
1995api_schedule_to (pTHX_ SV *coro_sv)
1996{
1997 struct coro_transfer_args ta;
1998 struct coro *next = SvSTATE (coro_sv);
1999
2000 SvREFCNT_inc_NN (coro_sv);
2001 prepare_schedule_to (aTHX_ &ta, next);
2002}
2003
2004static int
2005api_cede (pTHX)
2006{
2007 struct coro_transfer_args ta;
2008
2009 prepare_cede (aTHX_ &ta);
2010
2011 if (ecb_expect_true (ta.prev != ta.next))
2012 {
2013 TRANSFER (ta, 1);
2014 return 1;
2015 }
2016 else
2017 return 0;
2018}
2019
2020static int
2021api_cede_notself (pTHX)
2022{
2023 if (coro_nready)
2024 {
2025 struct coro_transfer_args ta;
2026
2027 prepare_cede_notself (aTHX_ &ta);
2028 TRANSFER (ta, 1);
2029 return 1;
2030 }
2031 else
2032 return 0;
2033}
2034
2035static void
2036api_trace (pTHX_ SV *coro_sv, int flags)
2037{
2038 struct coro *coro = SvSTATE (coro_sv);
2039
2040 if (coro->flags & CF_RUNNING)
2041 croak ("cannot enable tracing on a running coroutine, caught");
2042
2043 if (flags & CC_TRACE)
2044 {
2045 if (!coro->cctx)
2046 coro->cctx = cctx_new_run ();
2047 else if (!(coro->cctx->flags & CC_TRACE))
2048 croak ("cannot enable tracing on coroutine with custom stack, caught");
2049
2050 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2051 }
2052 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2053 {
2054 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2055
2056 if (coro->flags & CF_RUNNING)
2057 PL_runops = RUNOPS_DEFAULT;
2058 else
2059 coro->slot->runops = RUNOPS_DEFAULT;
2060 }
2061}
2062
2063static void
2064coro_push_av (pTHX_ AV *av, I32 gimme_v)
2065{
2066 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2067 {
2068 dSP;
2069
2070 if (gimme_v == G_SCALAR)
2071 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2072 else
728 { 2073 {
729 stack_put (prev__stack); 2074 int i;
730 prev->stack = 0; 2075 EXTEND (SP, AvFILLp (av) + 1);
2076
2077 for (i = 0; i <= AvFILLp (av); ++i)
2078 PUSHs (AvARRAY (av)[i]);
731 } 2079 }
732 2080
733 if (!next->stack) 2081 PUTBACK;
734 next->stack = stack_get (); 2082 }
2083}
735 2084
736 if (prev__stack != next->stack) 2085static void
2086coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2087{
2088 if (!coro->on_destroy)
2089 coro->on_destroy = newAV ();
2090
2091 av_push (coro->on_destroy, cb);
2092}
2093
2094static void
2095slf_destroy_join (pTHX_ struct CoroSLF *frame)
2096{
2097 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2098}
2099
2100static int
2101slf_check_join (pTHX_ struct CoroSLF *frame)
2102{
2103 struct coro *coro = (struct coro *)frame->data;
2104
2105 if (!coro->status)
2106 return 1;
2107
2108 frame->destroy = 0;
2109
2110 coro_push_av (aTHX_ coro->status, GIMME_V);
2111
2112 SvREFCNT_dec ((SV *)coro->hv);
2113
2114 return 0;
2115}
2116
2117static void
2118slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2121
2122 if (items > 1)
2123 croak ("join called with too many arguments");
2124
2125 if (coro->status)
2126 frame->prepare = prepare_nop;
2127 else
2128 {
2129 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2130 frame->prepare = prepare_schedule;
2131 }
2132
2133 frame->check = slf_check_join;
2134 frame->destroy = slf_destroy_join;
2135 frame->data = (void *)coro;
2136 SvREFCNT_inc (coro->hv);
2137}
2138
2139static void
2140coro_call_on_destroy (pTHX_ struct coro *coro)
2141{
2142 AV *od = coro->on_destroy;
2143
2144 if (!od)
2145 return;
2146
2147 coro->on_destroy = 0;
2148 sv_2mortal ((SV *)od);
2149
2150 while (AvFILLp (od) >= 0)
2151 {
2152 SV *cb = sv_2mortal (av_pop (od));
2153
2154 /* coro hv's (and only hv's at the moment) are supported as well */
2155 if (SvSTATEhv_p (aTHX_ cb))
2156 api_ready (aTHX_ cb);
2157 else
737 { 2158 {
738 prev__stack->top_env = PL_top_env; 2159 dSP; /* don't disturb outer sp */
739 PL_top_env = next->stack->top_env; 2160 PUSHMARK (SP);
740 printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D 2161
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2162 if (coro->status)
2163 {
2164 PUTBACK;
2165 coro_push_av (aTHX_ coro->status, G_ARRAY);
2166 SPAGAIN;
2167 }
2168
2169 PUTBACK;
2170 call_sv (cb, G_VOID | G_DISCARD);
742 } 2171 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 }
748}
749
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args
756{
757 struct coro *prev, *next;
758 int flags;
759};
760
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void
764coro_state_destroy (struct coro *coro)
765{
766 if (coro->refcnt--)
767 return;
768
769 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 2172 }
771 struct coro temp; 2173}
772 2174
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 2175static void
774 LOAD (aTHX_ coro); 2176coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
775 2177{
776 destroy_stacks (aTHX); 2178 AV *av;
777 2179
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2180 if (coro->status)
779
780 coro->mainstack = 0;
781 } 2181 {
2182 av = coro->status;
2183 av_clear (av);
2184 }
2185 else
2186 av = coro->status = newAV ();
782 2187
783 stack_free (coro->stack); 2188 /* items are actually not so common, so optimise for this case */
784 SvREFCNT_dec (coro->args); 2189 if (items)
785 Safefree (coro); 2190 {
2191 int i;
2192
2193 av_extend (av, items - 1);
2194
2195 for (i = 0; i < items; ++i)
2196 av_push (av, SvREFCNT_inc_NN (arg [i]));
2197 }
2198}
2199
2200static void
2201slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2202{
2203 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2204 api_ready (aTHX_ sv_manager);
2205
2206 frame->prepare = prepare_schedule;
2207 frame->check = slf_check_repeat;
2208
2209 /* as a minor optimisation, we could unwind all stacks here */
2210 /* but that puts extra pressure on pp_slf, and is not worth much */
2211 /*coro_unwind_stacks (aTHX);*/
2212}
2213
2214static void
2215slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 HV *coro_hv = (HV *)SvRV (coro_current);
2218
2219 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221}
2222
2223static void
2224slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2225{
2226 HV *coro_hv;
2227 struct coro *coro;
2228
2229 if (items <= 0)
2230 croak ("Coro::cancel called without coro object,");
2231
2232 coro = SvSTATE (arg [0]);
2233 coro_hv = coro->hv;
2234
2235 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2236
2237 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2238 {
2239 /* coro currently busy cancelling something, so just notify it */
2240 coro->slf_frame.data = (void *)coro;
2241
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 else if (coro_hv == (HV *)SvRV (coro_current))
2246 {
2247 /* cancelling the current coro is allowed, and equals terminate */
2248 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2249 }
2250 else
2251 {
2252 struct coro *self = SvSTATE_current;
2253
2254 /* otherwise we cancel directly, purely for speed reasons
2255 * unfortunately, this requires some magic trickery, as
2256 * somebody else could cancel us, so we have to fight the cancellation.
2257 * this is ugly, and hopefully fully worth the extra speed.
2258 * besides, I can't get the slow-but-safe version working...
2259 */
2260 slf_frame.data = 0;
2261 self->flags |= CF_NOCANCEL;
2262 coro_state_destroy (aTHX_ coro);
2263 self->flags &= ~CF_NOCANCEL;
2264
2265 if (slf_frame.data)
2266 {
2267 /* while we were busy we have been cancelled, so terminate */
2268 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2269 }
2270 else
2271 {
2272 frame->prepare = prepare_nop;
2273 frame->check = slf_check_nop;
2274 }
2275 }
786} 2276}
787 2277
788static int 2278static int
789coro_state_clear (SV *sv, MAGIC *mg) 2279slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
790{ 2280{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 2281 frame->prepare = 0;
792 mg->mg_ptr = 0; 2282 coro_unwind_stacks (aTHX);
793 2283
794 coro_state_destroy (coro); 2284 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
795 2285
796 return 0; 2286 return 1;
797} 2287}
798 2288
799static int 2289static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 2290safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
801{ 2291{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 2292 if (coro->cctx)
2293 croak ("coro inside C callback, unable to cancel at this time, caught");
803 2294
804 ++coro->refcnt; 2295 if (coro->flags & CF_NEW)
2296 {
2297 coro_set_status (aTHX_ coro, arg, items);
2298 coro_state_destroy (aTHX_ coro);
2299 }
2300 else
2301 {
2302 if (!coro->slf_frame.prepare)
2303 croak ("coro outside an SLF function, unable to cancel at this time, caught");
805 2304
2305 slf_destroy (aTHX_ coro);
2306
2307 coro_set_status (aTHX_ coro, arg, items);
2308 coro->slf_frame.prepare = prepare_nop;
2309 coro->slf_frame.check = slf_check_safe_cancel;
2310
2311 api_ready (aTHX_ (SV *)coro->hv);
2312 }
2313
806 return 0; 2314 return 1;
807} 2315}
808 2316
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
810
811static struct coro *
812SvSTATE (SV *coro)
813{
814 HV *stash;
815 MAGIC *mg;
816
817 if (SvROK (coro))
818 coro = SvRV (coro);
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832
833static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
835{
836 ta->prev = SvSTATE (prev);
837 ta->next = SvSTATE (next);
838 ta->flags = flags;
839}
840
841static void
842api_transfer (SV *prev, SV *next, int flags)
843{
844 dTHX;
845 struct transfer_args ta;
846
847 prepare_transfer (aTHX_ &ta, prev, next, flags);
848 TRANSFER (ta);
849}
850
851/** Coro ********************************************************************/ 2317/*****************************************************************************/
2318/* async pool handler */
852 2319
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void 2320static int
866coro_enq (pTHX_ SV *sv) 2321slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
867{ 2322{
868 int prio; 2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = (struct coro *)frame->data;
869 2325
870 if (SvTYPE (sv) != SVt_PVHV) 2326 if (!coro->invoke_cb)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2327 return 1; /* loop till we have invoke */
872 2328 else
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (pTHX_ int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0)
890 { 2329 {
891 coro_nready--; 2330 hv_store (hv, "desc", sizeof ("desc") - 1,
892 return av_shift (coro_ready [prio]); 2331 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
893 }
894 2332
895 return 0; 2333 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
896}
897
898static void
899api_ready (SV *coro)
900{
901 dTHX;
902
903 if (SvROK (coro))
904 coro = SvRV (coro);
905
906 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro));
908 UNLOCK;
909}
910
911static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930 2334
931 { 2335 {
932 dSP; 2336 dSP;
933 2337 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 2338 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 2339 }
2340
2341 SvREFCNT_dec (GvAV (PL_defgv));
2342 GvAV (PL_defgv) = coro->invoke_av;
2343 coro->invoke_av = 0;
2344
2345 return 0;
2346 }
2347}
2348
2349static void
2350slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2351{
2352 HV *hv = (HV *)SvRV (coro_current);
2353 struct coro *coro = SvSTATE_hv ((SV *)hv);
2354
2355 if (ecb_expect_true (coro->saved_deffh))
944 } 2356 {
2357 /* subsequent iteration */
2358 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2359 coro->saved_deffh = 0;
945 2360
946 prev = SvRV (current); 2361 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 2362 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2363 {
2364 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2365 return;
2366 }
2367 else
2368 {
2369 av_clear (GvAV (PL_defgv));
2370 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
948 2371
949 /* free this only after the transfer */ 2372 coro->prio = 0;
950 free_coro_mortal ();
951 coro_mortal = prev;
952 2373
953 ta->prev = SvSTATE (prev); 2374 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
954 ta->next = SvSTATE (next); 2375 api_trace (aTHX_ coro_current, 0);
955 ta->flags = TRANSFER_SAVE_ALL;
956 2376
957 UNLOCK; 2377 frame->prepare = prepare_schedule;
958} 2378 av_push (av_async_pool, SvREFCNT_inc (hv));
2379 }
2380 }
2381 else
2382 {
2383 /* first iteration, simply fall through */
2384 frame->prepare = prepare_nop;
2385 }
959 2386
2387 frame->check = slf_check_pool_handler;
2388 frame->data = (void *)coro;
2389}
2390
2391/*****************************************************************************/
2392/* rouse callback */
2393
2394#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2395
2396static void
2397coro_rouse_callback (pTHX_ CV *cv)
2398{
2399 dXSARGS;
2400 SV *data = (SV *)S_GENSUB_ARG;
2401
2402 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2403 {
2404 /* first call, set args */
2405 SV *coro = SvRV (data);
2406 AV *av = newAV ();
2407
2408 SvRV_set (data, (SV *)av);
2409
2410 /* better take a full copy of the arguments */
2411 while (items--)
2412 av_store (av, items, newSVsv (ST (items)));
2413
2414 api_ready (aTHX_ coro);
2415 SvREFCNT_dec (coro);
2416 }
2417
2418 XSRETURN_EMPTY;
2419}
2420
960static void 2421static int
2422slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2423{
2424 SV *data = (SV *)frame->data;
2425
2426 if (CORO_THROW)
2427 return 0;
2428
2429 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2430 return 1;
2431
2432 /* now push all results on the stack */
2433 {
2434 dSP;
2435 AV *av = (AV *)SvRV (data);
2436 int i;
2437
2438 EXTEND (SP, AvFILLp (av) + 1);
2439 for (i = 0; i <= AvFILLp (av); ++i)
2440 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2441
2442 /* we have stolen the elements, so set length to zero and free */
2443 AvFILLp (av) = -1;
2444 av_undef (av);
2445
2446 PUTBACK;
2447 }
2448
2449 return 0;
2450}
2451
2452static void
2453slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2454{
2455 SV *cb;
2456
2457 if (items)
2458 cb = arg [0];
2459 else
2460 {
2461 struct coro *coro = SvSTATE_current;
2462
2463 if (!coro->rouse_cb)
2464 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2465
2466 cb = sv_2mortal (coro->rouse_cb);
2467 coro->rouse_cb = 0;
2468 }
2469
2470 if (!SvROK (cb)
2471 || SvTYPE (SvRV (cb)) != SVt_PVCV
2472 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2473 croak ("Coro::rouse_wait called with illegal callback argument,");
2474
2475 {
2476 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2477 SV *data = (SV *)S_GENSUB_ARG;
2478
2479 frame->data = (void *)data;
2480 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2481 frame->check = slf_check_rouse_wait;
2482 }
2483}
2484
2485static SV *
2486coro_new_rouse_cb (pTHX)
2487{
2488 HV *hv = (HV *)SvRV (coro_current);
2489 struct coro *coro = SvSTATE_hv (hv);
2490 SV *data = newRV_inc ((SV *)hv);
2491 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2492
2493 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2494 SvREFCNT_dec (data); /* magicext increases the refcount */
2495
2496 SvREFCNT_dec (coro->rouse_cb);
2497 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2498
2499 return cb;
2500}
2501
2502/*****************************************************************************/
2503/* schedule-like-function opcode (SLF) */
2504
2505static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2506static const CV *slf_cv;
2507static SV **slf_argv;
2508static int slf_argc, slf_arga; /* count, allocated */
2509static I32 slf_ax; /* top of stack, for restore */
2510
2511/* this restores the stack in the case we patched the entersub, to */
2512/* recreate the stack frame as perl will on following calls */
2513/* since entersub cleared the stack */
2514static OP *
2515pp_restore (pTHX)
2516{
2517 int i;
2518 SV **SP = PL_stack_base + slf_ax;
2519
2520 PUSHMARK (SP);
2521
2522 EXTEND (SP, slf_argc + 1);
2523
2524 for (i = 0; i < slf_argc; ++i)
2525 PUSHs (sv_2mortal (slf_argv [i]));
2526
2527 PUSHs ((SV *)CvGV (slf_cv));
2528
2529 RETURNOP (slf_restore.op_first);
2530}
2531
2532static void
2533slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2534{
2535 SV **arg = (SV **)slf_frame.data;
2536
2537 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2538}
2539
2540static void
2541slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2542{
2543 if (items != 2)
2544 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2545
2546 frame->prepare = slf_prepare_transfer;
2547 frame->check = slf_check_nop;
2548 frame->data = (void *)arg; /* let's hope it will stay valid */
2549}
2550
2551static void
2552slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2553{
2554 frame->prepare = prepare_schedule;
2555 frame->check = slf_check_nop;
2556}
2557
2558static void
961prepare_cede (aTHX_ struct transfer_args *ta) 2559slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2560{
963 LOCK; 2561 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2562
2563 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2564 prepare_schedule_to (aTHX_ ta, next);
968} 2565}
969 2566
970static void 2567static void
971api_schedule (void) 2568slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2569{
973 dTHX; 2570 if (!items)
2571 croak ("Coro::schedule_to expects a coroutine argument, caught");
2572
2573 frame->data = (void *)SvSTATE (arg [0]);
2574 frame->prepare = slf_prepare_schedule_to;
2575 frame->check = slf_check_nop;
2576}
2577
2578static void
2579slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2580{
2581 api_ready (aTHX_ SvRV (coro_current));
2582
2583 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2584}
2585
2586static void
2587slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 frame->prepare = prepare_cede;
2590 frame->check = slf_check_nop;
2591}
2592
2593static void
2594slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2595{
2596 frame->prepare = prepare_cede_notself;
2597 frame->check = slf_check_nop;
2598}
2599
2600/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2601static void
2602slf_destroy (pTHX_ struct coro *coro)
2603{
2604 /* this callback is reserved for slf functions needing to do cleanup */
2605 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2606 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2607
2608 /*
2609 * The on_destroy above most likely is from an SLF call.
2610 * Since by definition the SLF call will not finish when we destroy
2611 * the coro, we will have to force-finish it here, otherwise
2612 * cleanup functions cannot call SLF functions.
2613 */
2614 coro->slf_frame.prepare = 0;
2615}
2616
2617/*
2618 * these not obviously related functions are all rolled into one
2619 * function to increase chances that they all will call transfer with the same
2620 * stack offset
2621 * SLF stands for "schedule-like-function".
2622 */
2623static OP *
2624pp_slf (pTHX)
2625{
2626 I32 checkmark; /* mark SP to see how many elements check has pushed */
2627
2628 /* set up the slf frame, unless it has already been set-up */
2629 /* the latter happens when a new coro has been started */
2630 /* or when a new cctx was attached to an existing coroutine */
2631 if (ecb_expect_true (!slf_frame.prepare))
2632 {
2633 /* first iteration */
2634 dSP;
2635 SV **arg = PL_stack_base + TOPMARK + 1;
2636 int items = SP - arg; /* args without function object */
2637 SV *gv = *sp;
2638
2639 /* do a quick consistency check on the "function" object, and if it isn't */
2640 /* for us, divert to the real entersub */
2641 if (SvTYPE (gv) != SVt_PVGV
2642 || !GvCV (gv)
2643 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2644 return PL_ppaddr[OP_ENTERSUB](aTHX);
2645
2646 if (!(PL_op->op_flags & OPf_STACKED))
2647 {
2648 /* ampersand-form of call, use @_ instead of stack */
2649 AV *av = GvAV (PL_defgv);
2650 arg = AvARRAY (av);
2651 items = AvFILLp (av) + 1;
2652 }
2653
2654 /* now call the init function, which needs to set up slf_frame */
2655 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2656 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2657
2658 /* pop args */
2659 SP = PL_stack_base + POPMARK;
2660
2661 PUTBACK;
2662 }
2663
2664 /* now that we have a slf_frame, interpret it! */
2665 /* we use a callback system not to make the code needlessly */
2666 /* complicated, but so we can run multiple perl coros from one cctx */
2667
2668 do
2669 {
974 struct transfer_args ta; 2670 struct coro_transfer_args ta;
975 2671
976 prepare_schedule (&ta); 2672 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2673 TRANSFER (ta, 0);
978}
979 2674
2675 checkmark = PL_stack_sp - PL_stack_base;
2676 }
2677 while (slf_frame.check (aTHX_ &slf_frame));
2678
2679 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2680
2681 /* exception handling */
2682 if (ecb_expect_false (CORO_THROW))
2683 {
2684 SV *exception = sv_2mortal (CORO_THROW);
2685
2686 CORO_THROW = 0;
2687 sv_setsv (ERRSV, exception);
2688 croak (0);
2689 }
2690
2691 /* return value handling - mostly like entersub */
2692 /* make sure we put something on the stack in scalar context */
2693 if (GIMME_V == G_SCALAR
2694 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2695 {
2696 dSP;
2697 SV **bot = PL_stack_base + checkmark;
2698
2699 if (sp == bot) /* too few, push undef */
2700 bot [1] = &PL_sv_undef;
2701 else /* too many, take last one */
2702 bot [1] = *sp;
2703
2704 SP = bot + 1;
2705
2706 PUTBACK;
2707 }
2708
2709 return NORMAL;
2710}
2711
2712static void
2713api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2714{
2715 int i;
2716 SV **arg = PL_stack_base + ax;
2717 int items = PL_stack_sp - arg + 1;
2718
2719 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2720
2721 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2722 && PL_op->op_ppaddr != pp_slf)
2723 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2724
2725 CvFLAGS (cv) |= CVf_SLF;
2726 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2727 slf_cv = cv;
2728
2729 /* we patch the op, and then re-run the whole call */
2730 /* we have to put the same argument on the stack for this to work */
2731 /* and this will be done by pp_restore */
2732 slf_restore.op_next = (OP *)&slf_restore;
2733 slf_restore.op_type = OP_CUSTOM;
2734 slf_restore.op_ppaddr = pp_restore;
2735 slf_restore.op_first = PL_op;
2736
2737 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2738
2739 if (PL_op->op_flags & OPf_STACKED)
2740 {
2741 if (items > slf_arga)
2742 {
2743 slf_arga = items;
2744 Safefree (slf_argv);
2745 New (0, slf_argv, slf_arga, SV *);
2746 }
2747
2748 slf_argc = items;
2749
2750 for (i = 0; i < items; ++i)
2751 slf_argv [i] = SvREFCNT_inc (arg [i]);
2752 }
2753 else
2754 slf_argc = 0;
2755
2756 PL_op->op_ppaddr = pp_slf;
2757 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2758
2759 PL_op = (OP *)&slf_restore;
2760}
2761
2762/*****************************************************************************/
2763/* dynamic wind */
2764
2765static void
2766on_enterleave_call (pTHX_ SV *cb)
2767{
2768 dSP;
2769
2770 PUSHSTACK;
2771
2772 PUSHMARK (SP);
2773 PUTBACK;
2774 call_sv (cb, G_VOID | G_DISCARD);
2775 SPAGAIN;
2776
2777 POPSTACK;
2778}
2779
2780static SV *
2781coro_avp_pop_and_free (pTHX_ AV **avp)
2782{
2783 AV *av = *avp;
2784 SV *res = av_pop (av);
2785
2786 if (AvFILLp (av) < 0)
2787 {
2788 *avp = 0;
2789 SvREFCNT_dec (av);
2790 }
2791
2792 return res;
2793}
2794
2795static void
2796coro_pop_on_enter (pTHX_ void *coro)
2797{
2798 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2799 SvREFCNT_dec (cb);
2800}
2801
2802static void
2803coro_pop_on_leave (pTHX_ void *coro)
2804{
2805 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2806 on_enterleave_call (aTHX_ sv_2mortal (cb));
2807}
2808
2809/*****************************************************************************/
2810/* PerlIO::cede */
2811
2812typedef struct
2813{
2814 PerlIOBuf base;
2815 NV next, every;
2816} PerlIOCede;
2817
2818static IV ecb_cold
2819PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2820{
2821 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2822
2823 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2824 self->next = nvtime () + self->every;
2825
2826 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2827}
2828
2829static SV * ecb_cold
2830PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2831{
2832 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2833
2834 return newSVnv (self->every);
2835}
2836
2837static IV
2838PerlIOCede_flush (pTHX_ PerlIO *f)
2839{
2840 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2841 double now = nvtime ();
2842
2843 if (now >= self->next)
2844 {
2845 api_cede (aTHX);
2846 self->next = now + self->every;
2847 }
2848
2849 return PerlIOBuf_flush (aTHX_ f);
2850}
2851
2852static PerlIO_funcs PerlIO_cede =
2853{
2854 sizeof(PerlIO_funcs),
2855 "cede",
2856 sizeof(PerlIOCede),
2857 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2858 PerlIOCede_pushed,
2859 PerlIOBuf_popped,
2860 PerlIOBuf_open,
2861 PerlIOBase_binmode,
2862 PerlIOCede_getarg,
2863 PerlIOBase_fileno,
2864 PerlIOBuf_dup,
2865 PerlIOBuf_read,
2866 PerlIOBuf_unread,
2867 PerlIOBuf_write,
2868 PerlIOBuf_seek,
2869 PerlIOBuf_tell,
2870 PerlIOBuf_close,
2871 PerlIOCede_flush,
2872 PerlIOBuf_fill,
2873 PerlIOBase_eof,
2874 PerlIOBase_error,
2875 PerlIOBase_clearerr,
2876 PerlIOBase_setlinebuf,
2877 PerlIOBuf_get_base,
2878 PerlIOBuf_bufsiz,
2879 PerlIOBuf_get_ptr,
2880 PerlIOBuf_get_cnt,
2881 PerlIOBuf_set_ptrcnt,
2882};
2883
2884/*****************************************************************************/
2885/* Coro::Semaphore & Coro::Signal */
2886
2887static SV *
2888coro_waitarray_new (pTHX_ int count)
2889{
2890 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2891 AV *av = newAV ();
2892 SV **ary;
2893
2894 /* unfortunately, building manually saves memory */
2895 Newx (ary, 2, SV *);
2896 AvALLOC (av) = ary;
2897#if PERL_VERSION_ATLEAST (5,10,0)
2898 AvARRAY (av) = ary;
2899#else
2900 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2901 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2902 SvPVX ((SV *)av) = (char *)ary;
2903#endif
2904 AvMAX (av) = 1;
2905 AvFILLp (av) = 0;
2906 ary [0] = newSViv (count);
2907
2908 return newRV_noinc ((SV *)av);
2909}
2910
2911/* semaphore */
2912
2913static void
2914coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2915{
2916 SV *count_sv = AvARRAY (av)[0];
2917 IV count = SvIVX (count_sv);
2918
2919 count += adjust;
2920 SvIVX (count_sv) = count;
2921
2922 /* now wake up as many waiters as are expected to lock */
2923 while (count > 0 && AvFILLp (av) > 0)
2924 {
2925 SV *cb;
2926
2927 /* swap first two elements so we can shift a waiter */
2928 AvARRAY (av)[0] = AvARRAY (av)[1];
2929 AvARRAY (av)[1] = count_sv;
2930 cb = av_shift (av);
2931
2932 if (SvOBJECT (cb))
2933 {
2934 api_ready (aTHX_ cb);
2935 --count;
2936 }
2937 else if (SvTYPE (cb) == SVt_PVCV)
2938 {
2939 dSP;
2940 PUSHMARK (SP);
2941 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2942 PUTBACK;
2943 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2944 }
2945
2946 SvREFCNT_dec (cb);
2947 }
2948}
2949
2950static void
2951coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2952{
2953 /* call $sem->adjust (0) to possibly wake up some other waiters */
2954 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2955}
2956
980static void 2957static int
981api_cede (void) 2958slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 2959{
983 dTHX; 2960 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 2961 SV *count_sv = AvARRAY (av)[0];
2962 SV *coro_hv = SvRV (coro_current);
985 2963
986 prepare_cede (&ta); 2964 /* if we are about to throw, don't actually acquire the lock, just throw */
987 TRANSFER (ta); 2965 if (CORO_THROW)
988} 2966 return 0;
2967 else if (SvIVX (count_sv) > 0)
2968 {
2969 frame->destroy = 0;
989 2970
2971 if (acquire)
2972 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2973 else
2974 coro_semaphore_adjust (aTHX_ av, 0);
2975
2976 return 0;
2977 }
2978 else
2979 {
2980 int i;
2981 /* if we were woken up but can't down, we look through the whole */
2982 /* waiters list and only add us if we aren't in there already */
2983 /* this avoids some degenerate memory usage cases */
2984 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2985 if (AvARRAY (av)[i] == coro_hv)
2986 return 1;
2987
2988 av_push (av, SvREFCNT_inc (coro_hv));
2989 return 1;
2990 }
2991}
2992
2993static int
2994slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2995{
2996 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2997}
2998
2999static int
3000slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3001{
3002 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3003}
3004
3005static void
3006slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3007{
3008 AV *av = (AV *)SvRV (arg [0]);
3009
3010 if (SvIVX (AvARRAY (av)[0]) > 0)
3011 {
3012 frame->data = (void *)av;
3013 frame->prepare = prepare_nop;
3014 }
3015 else
3016 {
3017 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3018
3019 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3020 frame->prepare = prepare_schedule;
3021 /* to avoid race conditions when a woken-up coro gets terminated */
3022 /* we arrange for a temporary on_destroy that calls adjust (0) */
3023 frame->destroy = coro_semaphore_destroy;
3024 }
3025}
3026
3027static void
3028slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3029{
3030 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3031 frame->check = slf_check_semaphore_down;
3032}
3033
3034static void
3035slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3036{
3037 if (items >= 2)
3038 {
3039 /* callback form */
3040 AV *av = (AV *)SvRV (arg [0]);
3041 SV *cb_cv = s_get_cv_croak (arg [1]);
3042
3043 av_push (av, SvREFCNT_inc_NN (cb_cv));
3044
3045 if (SvIVX (AvARRAY (av)[0]) > 0)
3046 coro_semaphore_adjust (aTHX_ av, 0);
3047
3048 frame->prepare = prepare_nop;
3049 frame->check = slf_check_nop;
3050 }
3051 else
3052 {
3053 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3054 frame->check = slf_check_semaphore_wait;
3055 }
3056}
3057
3058/* signal */
3059
3060static void
3061coro_signal_wake (pTHX_ AV *av, int count)
3062{
3063 SvIVX (AvARRAY (av)[0]) = 0;
3064
3065 /* now signal count waiters */
3066 while (count > 0 && AvFILLp (av) > 0)
3067 {
3068 SV *cb;
3069
3070 /* swap first two elements so we can shift a waiter */
3071 cb = AvARRAY (av)[0];
3072 AvARRAY (av)[0] = AvARRAY (av)[1];
3073 AvARRAY (av)[1] = cb;
3074
3075 cb = av_shift (av);
3076
3077 if (SvTYPE (cb) == SVt_PVCV)
3078 {
3079 dSP;
3080 PUSHMARK (SP);
3081 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3082 PUTBACK;
3083 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3084 }
3085 else
3086 {
3087 api_ready (aTHX_ cb);
3088 sv_setiv (cb, 0); /* signal waiter */
3089 }
3090
3091 SvREFCNT_dec (cb);
3092
3093 --count;
3094 }
3095}
3096
3097static int
3098slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3099{
3100 /* if we are about to throw, also stop waiting */
3101 return SvROK ((SV *)frame->data) && !CORO_THROW;
3102}
3103
3104static void
3105slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3106{
3107 AV *av = (AV *)SvRV (arg [0]);
3108
3109 if (items >= 2)
3110 {
3111 SV *cb_cv = s_get_cv_croak (arg [1]);
3112 av_push (av, SvREFCNT_inc_NN (cb_cv));
3113
3114 if (SvIVX (AvARRAY (av)[0]))
3115 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3116
3117 frame->prepare = prepare_nop;
3118 frame->check = slf_check_nop;
3119 }
3120 else if (SvIVX (AvARRAY (av)[0]))
3121 {
3122 SvIVX (AvARRAY (av)[0]) = 0;
3123 frame->prepare = prepare_nop;
3124 frame->check = slf_check_nop;
3125 }
3126 else
3127 {
3128 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3129
3130 av_push (av, waiter);
3131
3132 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3133 frame->prepare = prepare_schedule;
3134 frame->check = slf_check_signal_wait;
3135 }
3136}
3137
3138/*****************************************************************************/
3139/* Coro::AIO */
3140
3141#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3142
3143/* helper storage struct */
3144struct io_state
3145{
3146 int errorno;
3147 I32 laststype; /* U16 in 5.10.0 */
3148 int laststatval;
3149 Stat_t statcache;
3150};
3151
3152static void
3153coro_aio_callback (pTHX_ CV *cv)
3154{
3155 dXSARGS;
3156 AV *state = (AV *)S_GENSUB_ARG;
3157 SV *coro = av_pop (state);
3158 SV *data_sv = newSV (sizeof (struct io_state));
3159
3160 av_extend (state, items - 1);
3161
3162 sv_upgrade (data_sv, SVt_PV);
3163 SvCUR_set (data_sv, sizeof (struct io_state));
3164 SvPOK_only (data_sv);
3165
3166 {
3167 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3168
3169 data->errorno = errno;
3170 data->laststype = PL_laststype;
3171 data->laststatval = PL_laststatval;
3172 data->statcache = PL_statcache;
3173 }
3174
3175 /* now build the result vector out of all the parameters and the data_sv */
3176 {
3177 int i;
3178
3179 for (i = 0; i < items; ++i)
3180 av_push (state, SvREFCNT_inc_NN (ST (i)));
3181 }
3182
3183 av_push (state, data_sv);
3184
3185 api_ready (aTHX_ coro);
3186 SvREFCNT_dec (coro);
3187 SvREFCNT_dec ((AV *)state);
3188}
3189
3190static int
3191slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3192{
3193 AV *state = (AV *)frame->data;
3194
3195 /* if we are about to throw, return early */
3196 /* this does not cancel the aio request, but at least */
3197 /* it quickly returns */
3198 if (CORO_THROW)
3199 return 0;
3200
3201 /* one element that is an RV? repeat! */
3202 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3203 return 1;
3204
3205 /* restore status */
3206 {
3207 SV *data_sv = av_pop (state);
3208 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3209
3210 errno = data->errorno;
3211 PL_laststype = data->laststype;
3212 PL_laststatval = data->laststatval;
3213 PL_statcache = data->statcache;
3214
3215 SvREFCNT_dec (data_sv);
3216 }
3217
3218 /* push result values */
3219 {
3220 dSP;
3221 int i;
3222
3223 EXTEND (SP, AvFILLp (state) + 1);
3224 for (i = 0; i <= AvFILLp (state); ++i)
3225 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3226
3227 PUTBACK;
3228 }
3229
3230 return 0;
3231}
3232
3233static void
3234slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3235{
3236 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3237 SV *coro_hv = SvRV (coro_current);
3238 struct coro *coro = SvSTATE_hv (coro_hv);
3239
3240 /* put our coroutine id on the state arg */
3241 av_push (state, SvREFCNT_inc_NN (coro_hv));
3242
3243 /* first see whether we have a non-zero priority and set it as AIO prio */
3244 if (coro->prio)
3245 {
3246 dSP;
3247
3248 static SV *prio_cv;
3249 static SV *prio_sv;
3250
3251 if (ecb_expect_false (!prio_cv))
3252 {
3253 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3254 prio_sv = newSViv (0);
3255 }
3256
3257 PUSHMARK (SP);
3258 sv_setiv (prio_sv, coro->prio);
3259 XPUSHs (prio_sv);
3260
3261 PUTBACK;
3262 call_sv (prio_cv, G_VOID | G_DISCARD);
3263 }
3264
3265 /* now call the original request */
3266 {
3267 dSP;
3268 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3269 int i;
3270
3271 PUSHMARK (SP);
3272
3273 /* first push all args to the stack */
3274 EXTEND (SP, items + 1);
3275
3276 for (i = 0; i < items; ++i)
3277 PUSHs (arg [i]);
3278
3279 /* now push the callback closure */
3280 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3281
3282 /* now call the AIO function - we assume our request is uncancelable */
3283 PUTBACK;
3284 call_sv ((SV *)req, G_VOID | G_DISCARD);
3285 }
3286
3287 /* now that the request is going, we loop till we have a result */
3288 frame->data = (void *)state;
3289 frame->prepare = prepare_schedule;
3290 frame->check = slf_check_aio_req;
3291}
3292
3293static void
3294coro_aio_req_xs (pTHX_ CV *cv)
3295{
3296 dXSARGS;
3297
3298 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3299
3300 XSRETURN_EMPTY;
3301}
3302
3303/*****************************************************************************/
3304
3305#if CORO_CLONE
3306# include "clone.c"
3307#endif
3308
3309/*****************************************************************************/
3310
3311static SV *
3312coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3313{
3314 SV *coro_sv;
3315 struct coro *coro;
3316 MAGIC *mg;
3317 HV *hv;
3318 SV *cb;
3319 int i;
3320
3321 if (argc > 0)
3322 {
3323 cb = s_get_cv_croak (argv [0]);
3324
3325 if (!is_coro)
3326 {
3327 if (CvISXSUB (cb))
3328 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3329
3330 if (!CvROOT (cb))
3331 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3332 }
3333 }
3334
3335 Newz (0, coro, 1, struct coro);
3336 coro->args = newAV ();
3337 coro->flags = CF_NEW;
3338
3339 if (coro_first) coro_first->prev = coro;
3340 coro->next = coro_first;
3341 coro_first = coro;
3342
3343 coro->hv = hv = newHV ();
3344 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3345 mg->mg_flags |= MGf_DUP;
3346 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3347
3348 if (argc > 0)
3349 {
3350 av_extend (coro->args, argc + is_coro - 1);
3351
3352 if (is_coro)
3353 {
3354 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3355 cb = (SV *)cv_coro_run;
3356 }
3357
3358 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3359
3360 for (i = 1; i < argc; i++)
3361 av_push (coro->args, newSVsv (argv [i]));
3362 }
3363
3364 return coro_sv;
3365}
3366
3367#ifndef __cplusplus
3368ecb_cold XS(boot_Coro__State);
3369#endif
3370
3371#if CORO_JIT
3372
3373static void ecb_noinline ecb_cold
3374pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3375{
3376 dSP;
3377 AV *av = newAV ();
3378
3379 av_store (av, 3, newSVuv (d));
3380 av_store (av, 2, newSVuv (c));
3381 av_store (av, 1, newSVuv (b));
3382 av_store (av, 0, newSVuv (a));
3383
3384 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3385
3386 PUTBACK;
3387}
3388
3389static void ecb_noinline ecb_cold
3390jit_init (pTHX)
3391{
3392 dSP;
3393 SV *load, *save;
3394 char *map_base;
3395 char *load_ptr, *save_ptr;
3396 STRLEN load_len, save_len, map_len;
3397 int count;
3398
3399 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3400
3401 PUSHMARK (SP);
3402 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3403 #include "state.h"
3404 count = call_pv ("Coro::State::_jit", G_ARRAY);
3405 SPAGAIN;
3406
3407 save = POPs; save_ptr = SvPVbyte (save, save_len);
3408 load = POPs; load_ptr = SvPVbyte (load, load_len);
3409
3410 map_len = load_len + save_len + 16;
3411
3412 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3413
3414 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3415
3416 load_perl_slots = (load_save_perl_slots_type)map_base;
3417 memcpy (map_base, load_ptr, load_len);
3418
3419 map_base += (load_len + 15) & ~15;
3420
3421 save_perl_slots = (load_save_perl_slots_type)map_base;
3422 memcpy (map_base, save_ptr, save_len);
3423
3424 /* we are good citizens and try to make the page read-only, so the evil evil */
3425 /* hackers might have it a bit more difficult */
3426 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3427
3428 PUTBACK;
3429 eval_pv ("undef &Coro::State::_jit", 1);
3430}
3431
3432#endif
3433
990MODULE = Coro::State PACKAGE = Coro::State 3434MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 3435
992PROTOTYPES: DISABLE 3436PROTOTYPES: DISABLE
993 3437
994BOOT: 3438BOOT:
995{ 3439{
996#ifdef USE_ITHREADS 3440#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 3441# if CORO_PTHREAD
3442 coro_thx = PERL_GET_CONTEXT;
998#endif 3443# endif
999 BOOT_PAGESIZE; 3444#endif
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));
1000 3464
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3465 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 3466
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3467 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3468 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 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));
1006 3471
1007 main_mainstack = PL_mainstack; 3472 main_mainstack = PL_mainstack;
3473 main_top_env = PL_top_env;
1008 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
1009 coroapi.ver = CORO_API_VERSION; 3488 coroapi.ver = CORO_API_VERSION;
3489 coroapi.rev = CORO_API_REVISION;
3490
1010 coroapi.transfer = api_transfer; 3491 coroapi.transfer = api_transfer;
1011 3492
1012 Newz (0, main_stack, 1, coro_stack); 3493 coroapi.sv_state = SvSTATE_;
1013 main_stack->idle_sp = (void *)-1; 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;
1014 3499
3500 time_init (aTHX);
3501
1015 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
1016} 3508}
1017 3509
1018SV * 3510SV *
1019new (char *klass, ...) 3511new (SV *klass, ...)
3512 ALIAS:
3513 Coro::new = 1
1020 CODE: 3514 CODE:
1021{ 3515 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1022 struct coro *coro; 3516 OUTPUT:
1023 HV *hv; 3517 RETVAL
1024 int i;
1025 3518
1026 Newz (0, coro, 1, struct coro); 3519void
1027 coro->args = newAV (); 3520transfer (...)
3521 PROTOTYPE: $$
3522 CODE:
3523 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1028 3524
3525SV *
3526clone (Coro::State coro)
3527 CODE:
3528{
3529#if CORO_CLONE
3530 struct coro *ncoro = coro_clone (aTHX_ coro);
3531 MAGIC *mg;
3532 /* TODO: too much duplication */
1029 hv = newHV (); 3533 ncoro->hv = newHV ();
1030 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3534 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3535 mg->mg_flags |= MGf_DUP;
1031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3536 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3537#else
3538 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3539#endif
3540}
3541 OUTPUT:
3542 RETVAL
1032 3543
1033 for (i = 1; i < items; i++) 3544int
1034 av_push (coro->args, newSVsv (ST (i))); 3545cctx_stacksize (int new_stacksize = 0)
3546 PROTOTYPE: ;$
3547 CODE:
3548 RETVAL = cctx_stacksize;
3549 if (new_stacksize)
3550 {
3551 cctx_stacksize = new_stacksize;
3552 ++cctx_gen;
3553 }
3554 OUTPUT:
3555 RETVAL
1035 3556
1036 coro->stack = main_stack; 3557int
1037 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3558cctx_max_idle (int max_idle = 0)
1038 /*coro->stack = 0;*/ 3559 PROTOTYPE: ;$
3560 CODE:
3561 RETVAL = cctx_max_idle;
3562 if (max_idle > 1)
3563 cctx_max_idle = max_idle;
3564 OUTPUT:
3565 RETVAL
3566
3567int
3568cctx_count ()
3569 PROTOTYPE:
3570 CODE:
3571 RETVAL = cctx_count;
3572 OUTPUT:
3573 RETVAL
3574
3575int
3576cctx_idle ()
3577 PROTOTYPE:
3578 CODE:
3579 RETVAL = cctx_idle;
3580 OUTPUT:
3581 RETVAL
3582
3583void
3584list ()
3585 PROTOTYPE:
3586 PPCODE:
3587{
3588 struct coro *coro;
3589 for (coro = coro_first; coro; coro = coro->next)
3590 if (coro->hv)
3591 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3592}
3593
3594void
3595call (Coro::State coro, SV *coderef)
3596 ALIAS:
3597 eval = 1
3598 CODE:
3599{
3600 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3601 {
3602 struct coro *current = SvSTATE_current;
3603 struct CoroSLF slf_save;
3604
3605 if (current != coro)
3606 {
3607 PUTBACK;
3608 save_perl (aTHX_ current);
3609 load_perl (aTHX_ coro);
3610 /* the coro is most likely in an active SLF call.
3611 * while not strictly required (the code we execute is
3612 * not allowed to call any SLF functions), it's cleaner
3613 * to reinitialise the slf_frame and restore it later.
3614 * This might one day allow us to actually do SLF calls
3615 * from code executed here.
3616 */
3617 slf_save = slf_frame;
3618 slf_frame.prepare = 0;
3619 SPAGAIN;
3620 }
3621
3622 PUSHSTACK;
3623
3624 PUSHMARK (SP);
3625 PUTBACK;
3626
3627 if (ix)
3628 eval_sv (coderef, 0);
3629 else
3630 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3631
3632 POPSTACK;
3633 SPAGAIN;
3634
3635 if (current != coro)
3636 {
3637 PUTBACK;
3638 slf_frame = slf_save;
3639 save_perl (aTHX_ coro);
3640 load_perl (aTHX_ current);
3641 SPAGAIN;
3642 }
3643 }
3644}
3645
3646SV *
3647is_ready (Coro::State coro)
3648 PROTOTYPE: $
3649 ALIAS:
3650 is_ready = CF_READY
3651 is_running = CF_RUNNING
3652 is_new = CF_NEW
3653 is_destroyed = CF_ZOMBIE
3654 is_zombie = CF_ZOMBIE
3655 is_suspended = CF_SUSPENDED
3656 CODE:
3657 RETVAL = boolSV (coro->flags & ix);
3658 OUTPUT:
3659 RETVAL
3660
3661void
3662throw (SV *self, SV *exception = &PL_sv_undef)
3663 PROTOTYPE: $;$
3664 CODE:
3665{
3666 struct coro *coro = SvSTATE (self);
3667 struct coro *current = SvSTATE_current;
3668 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3669 SvREFCNT_dec (*exceptionp);
3670 SvGETMAGIC (exception);
3671 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3672
3673 api_ready (aTHX_ self);
3674}
3675
3676void
3677api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3678 PROTOTYPE: $;$
3679 C_ARGS: aTHX_ coro, flags
3680
3681SV *
3682has_cctx (Coro::State coro)
3683 PROTOTYPE: $
3684 CODE:
3685 /* maybe manage the running flag differently */
3686 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3687 OUTPUT:
3688 RETVAL
3689
3690int
3691is_traced (Coro::State coro)
3692 PROTOTYPE: $
3693 CODE:
3694 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3695 OUTPUT:
3696 RETVAL
3697
3698UV
3699rss (Coro::State coro)
3700 PROTOTYPE: $
3701 ALIAS:
3702 usecount = 1
3703 CODE:
3704 switch (ix)
3705 {
3706 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3707 case 1: RETVAL = coro->usecount; break;
3708 }
3709 OUTPUT:
3710 RETVAL
3711
3712void
3713force_cctx ()
3714 PROTOTYPE:
3715 CODE:
3716 cctx_current->idle_sp = 0;
3717
3718void
3719swap_defsv (Coro::State self)
3720 PROTOTYPE: $
3721 ALIAS:
3722 swap_defav = 1
3723 CODE:
3724 if (!self->slot)
3725 croak ("cannot swap state with coroutine that has no saved state,");
3726 else
3727 {
3728 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3729 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3730
3731 SV *tmp = *src; *src = *dst; *dst = tmp;
3732 }
3733
3734void
3735cancel (Coro::State self)
3736 CODE:
3737 coro_state_destroy (aTHX_ self);
3738
3739SV *
3740enable_times (int enabled = enable_times)
3741 CODE:
3742{
3743 RETVAL = boolSV (enable_times);
3744
3745 if (enabled != enable_times)
3746 {
3747 enable_times = enabled;
3748
3749 coro_times_update ();
3750 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3751 }
1039} 3752}
1040 OUTPUT: 3753 OUTPUT:
1041 RETVAL 3754 RETVAL
1042 3755
1043void 3756void
1044_set_stacklevel (...) 3757times (Coro::State self)
1045 ALIAS: 3758 PPCODE:
1046 Coro::State::transfer = 1
1047 Coro::schedule = 2
1048 Coro::cede = 3
1049 Coro::Cont::yield = 4
1050 CODE:
1051{ 3759{
1052 struct transfer_args ta; 3760 struct coro *current = SvSTATE (coro_current);
1053 3761
1054 switch (ix) 3762 if (ecb_expect_false (current == self))
1055 { 3763 {
1056 case 0: 3764 coro_times_update ();
1057 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3765 coro_times_add (SvSTATE (coro_current));
1058 ta.next = 0;
1059 ta.flags = TRANSFER_SET_STACKLEVEL;
1060 break;
1061
1062 case 1:
1063 if (items != 3)
1064 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1065
1066 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1067 break;
1068
1069 case 2:
1070 prepare_schedule (&ta);
1071 break;
1072
1073 case 3:
1074 prepare_cede (&ta);
1075 break;
1076
1077 case 4:
1078 {
1079 SV *yieldstack;
1080 SV *sv;
1081 AV *defav = GvAV (PL_defgv);
1082
1083 yieldstack = *hv_fetch (
1084 (HV *)SvRV (GvSV (coro_current)),
1085 "yieldstack", sizeof ("yieldstack") - 1,
1086 0
1087 );
1088
1089 /* set up @_ -- ugly */
1090 av_clear (defav);
1091 av_fill (defav, items - 1);
1092 while (items--)
1093 av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095 sv = av_pop ((AV *)SvRV (yieldstack));
1096 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098 ta.flags = 0;
1099 SvREFCNT_dec (sv);
1100 }
1101 break;
1102
1103 } 3766 }
1104 3767
1105 TRANSFER (ta); 3768 EXTEND (SP, 2);
3769 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3770 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3771
3772 if (ecb_expect_false (current == self))
3773 coro_times_sub (SvSTATE (coro_current));
1106} 3774}
1107 3775
1108void 3776void
1109_clone_state_from (SV *dst, SV *src) 3777swap_sv (Coro::State coro, SV *sv, SV *swapsv)
1110 CODE: 3778 CODE:
1111{ 3779{
1112 struct coro *coro_src = SvSTATE (src); 3780 struct coro *current = SvSTATE_current;
1113 3781
1114 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3782 if (current == coro)
3783 SWAP_SVS (current);
1115 3784
1116 ++coro_src->refcnt; 3785 if (!coro->swap_sv)
1117 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 3786 coro->swap_sv = newAV ();
1118}
1119 3787
1120void 3788 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
1121_nonlocal_goto (IV nextop) 3789 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
1122 CODE:
1123 /* uuh, somebody will kill me again for this */
1124 PL_op->op_next = INT2PTR (OP *, nextop);
1125 3790
1126void 3791 if (current == coro)
1127_exit (code) 3792 SWAP_SVS (current);
1128 int code 3793}
1129 PROTOTYPE: $ 3794
1130 CODE:
1131 _exit (code);
1132 3795
1133MODULE = Coro::State PACKAGE = Coro 3796MODULE = Coro::State PACKAGE = Coro
1134 3797
1135BOOT: 3798BOOT:
1136{ 3799{
1137 int i; 3800 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3801 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3802 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3803 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3804 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3805 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3806 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3807 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1138 3808
3809 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3810 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3811 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3812 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3813
1139 coro_stash = gv_stashpv ("Coro", TRUE); 3814 coro_stash = gv_stashpv ("Coro", TRUE);
1140 3815
1141 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3816 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1142 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3817 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1143 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3818 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1144 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3819 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1145 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3820 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1146 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3821 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1147
1148 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152 coro_ready[i] = newAV ();
1153 3822
1154 { 3823 {
1155 SV *sv = perl_get_sv("Coro::API", 1); 3824 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1156 3825
1157 coroapi.schedule = api_schedule; 3826 coroapi.schedule = api_schedule;
3827 coroapi.schedule_to = api_schedule_to;
1158 coroapi.cede = api_cede; 3828 coroapi.cede = api_cede;
3829 coroapi.cede_notself = api_cede_notself;
1159 coroapi.ready = api_ready; 3830 coroapi.ready = api_ready;
3831 coroapi.is_ready = api_is_ready;
1160 coroapi.nready = &coro_nready; 3832 coroapi.nready = coro_nready;
1161 coroapi.current = coro_current; 3833 coroapi.current = coro_current;
1162 3834
1163 GCoroAPI = &coroapi; 3835 /*GCoroAPI = &coroapi;*/
1164 sv_setiv (sv, (IV)&coroapi); 3836 sv_setiv (sv, (IV)&coroapi);
1165 SvREADONLY_on (sv); 3837 SvREADONLY_on (sv);
1166 } 3838 }
1167} 3839}
1168 3840
3841SV *
3842async (...)
3843 PROTOTYPE: &@
3844 CODE:
3845 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3846 api_ready (aTHX_ RETVAL);
3847 OUTPUT:
3848 RETVAL
3849
3850void
3851_destroy (Coro::State coro)
3852 CODE:
3853 /* used by the manager thread */
3854 coro_state_destroy (aTHX_ coro);
3855
3856void
3857on_destroy (Coro::State coro, SV *cb)
3858 CODE:
3859 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3860
3861void
3862join (...)
3863 CODE:
3864 CORO_EXECUTE_SLF_XS (slf_init_join);
3865
3866void
3867terminate (...)
3868 CODE:
3869 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3870
3871void
3872cancel (...)
3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3875
3876int
3877safe_cancel (Coro::State self, ...)
3878 C_ARGS: aTHX_ self, &ST (1), items - 1
3879
3880void
3881schedule (...)
3882 CODE:
3883 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3884
3885void
3886schedule_to (...)
3887 CODE:
3888 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3889
3890void
3891cede_to (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3894
3895void
3896cede (...)
3897 CODE:
3898 CORO_EXECUTE_SLF_XS (slf_init_cede);
3899
3900void
3901cede_notself (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3904
3905void
3906_set_current (SV *current)
3907 PROTOTYPE: $
3908 CODE:
3909 SvREFCNT_dec (SvRV (coro_current));
3910 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3911
3912void
3913_set_readyhook (SV *hook)
3914 PROTOTYPE: $
3915 CODE:
3916 SvREFCNT_dec (coro_readyhook);
3917 SvGETMAGIC (hook);
3918 if (SvOK (hook))
3919 {
3920 coro_readyhook = newSVsv (hook);
3921 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3922 }
3923 else
3924 {
3925 coro_readyhook = 0;
3926 CORO_READYHOOK = 0;
3927 }
3928
1169int 3929int
1170prio (Coro::State coro, int newprio = 0) 3930prio (Coro::State coro, int newprio = 0)
3931 PROTOTYPE: $;$
1171 ALIAS: 3932 ALIAS:
1172 nice = 1 3933 nice = 1
1173 CODE: 3934 CODE:
1174{ 3935{
1175 RETVAL = coro->prio; 3936 RETVAL = coro->prio;
1176 3937
1177 if (items > 1) 3938 if (items > 1)
1178 { 3939 {
1179 if (ix) 3940 if (ix)
1180 newprio += coro->prio; 3941 newprio = coro->prio - newprio;
1181 3942
1182 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3943 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1183 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3944 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1184 3945
1185 coro->prio = newprio; 3946 coro->prio = newprio;
1186 } 3947 }
1187} 3948}
3949 OUTPUT:
3950 RETVAL
1188 3951
1189void 3952SV *
1190ready (SV *self) 3953ready (SV *self)
1191 PROTOTYPE: $ 3954 PROTOTYPE: $
1192 CODE: 3955 CODE:
1193 api_ready (self); 3956 RETVAL = boolSV (api_ready (aTHX_ self));
3957 OUTPUT:
3958 RETVAL
1194 3959
1195int 3960int
1196nready (...) 3961nready (...)
1197 PROTOTYPE: 3962 PROTOTYPE:
1198 CODE: 3963 CODE:
1199 RETVAL = coro_nready; 3964 RETVAL = coro_nready;
1200 OUTPUT: 3965 OUTPUT:
1201 RETVAL 3966 RETVAL
1202 3967
1203MODULE = Coro::State PACKAGE = Coro::AIO 3968void
3969suspend (Coro::State self)
3970 PROTOTYPE: $
3971 CODE:
3972 self->flags |= CF_SUSPENDED;
3973
3974void
3975resume (Coro::State self)
3976 PROTOTYPE: $
3977 CODE:
3978 self->flags &= ~CF_SUSPENDED;
3979
3980void
3981_pool_handler (...)
3982 CODE:
3983 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3984
3985void
3986async_pool (SV *cv, ...)
3987 PROTOTYPE: &@
3988 PPCODE:
3989{
3990 HV *hv = (HV *)av_pop (av_async_pool);
3991 AV *av = newAV ();
3992 SV *cb = ST (0);
3993 int i;
3994
3995 av_extend (av, items - 2);
3996 for (i = 1; i < items; ++i)
3997 av_push (av, SvREFCNT_inc_NN (ST (i)));
3998
3999 if ((SV *)hv == &PL_sv_undef)
4000 {
4001 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4002 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4003 SvREFCNT_dec (sv);
4004 }
4005
4006 {
4007 struct coro *coro = SvSTATE_hv (hv);
4008
4009 assert (!coro->invoke_cb);
4010 assert (!coro->invoke_av);
4011 coro->invoke_cb = SvREFCNT_inc (cb);
4012 coro->invoke_av = av;
4013 }
4014
4015 api_ready (aTHX_ (SV *)hv);
4016
4017 if (GIMME_V != G_VOID)
4018 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4019 else
4020 SvREFCNT_dec (hv);
4021}
1204 4022
1205SV * 4023SV *
1206_get_state () 4024rouse_cb ()
4025 PROTOTYPE:
1207 CODE: 4026 CODE:
1208{ 4027 RETVAL = coro_new_rouse_cb (aTHX);
1209 struct {
1210 int errorno;
1211 int laststype;
1212 int laststatval;
1213 Stat_t statcache;
1214 } data;
1215
1216 data.errorno = errno;
1217 data.laststype = PL_laststype;
1218 data.laststatval = PL_laststatval;
1219 data.statcache = PL_statcache;
1220
1221 RETVAL = newSVpvn ((char *)&data, sizeof data);
1222}
1223 OUTPUT: 4028 OUTPUT:
1224 RETVAL 4029 RETVAL
1225 4030
1226void 4031void
1227_set_state (char *data_) 4032rouse_wait (...)
4033 PROTOTYPE: ;$
4034 PPCODE:
4035 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4036
4037void
4038on_enter (SV *block)
4039 ALIAS:
4040 on_leave = 1
1228 PROTOTYPE: $ 4041 PROTOTYPE: &
1229 CODE: 4042 CODE:
1230{ 4043{
1231 struct { 4044 struct coro *coro = SvSTATE_current;
4045 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4046
4047 block = s_get_cv_croak (block);
4048
4049 if (!*avp)
4050 *avp = newAV ();
4051
4052 av_push (*avp, SvREFCNT_inc (block));
4053
4054 if (!ix)
4055 on_enterleave_call (aTHX_ block);
4056
4057 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4058 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4059 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4060}
4061
4062
4063MODULE = Coro::State PACKAGE = PerlIO::cede
4064
4065BOOT:
4066 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4067
4068
4069MODULE = Coro::State PACKAGE = Coro::Semaphore
4070
4071SV *
4072new (SV *klass, SV *count = 0)
4073 CODE:
4074{
4075 int semcnt = 1;
4076
4077 if (count)
4078 {
4079 SvGETMAGIC (count);
4080
4081 if (SvOK (count))
4082 semcnt = SvIV (count);
4083 }
4084
4085 RETVAL = sv_bless (
4086 coro_waitarray_new (aTHX_ semcnt),
4087 GvSTASH (CvGV (cv))
4088 );
4089}
4090 OUTPUT:
4091 RETVAL
4092
4093# helper for Coro::Channel and others
4094SV *
4095_alloc (int count)
4096 CODE:
4097 RETVAL = coro_waitarray_new (aTHX_ count);
4098 OUTPUT:
4099 RETVAL
4100
4101SV *
4102count (SV *self)
4103 CODE:
4104 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4105 OUTPUT:
4106 RETVAL
4107
4108void
4109up (SV *self, int adjust = 1)
4110 ALIAS:
4111 adjust = 1
4112 CODE:
4113 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4114
4115void
4116down (...)
4117 CODE:
4118 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4119
4120void
4121wait (...)
4122 CODE:
4123 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4124
4125void
4126try (SV *self)
4127 PPCODE:
4128{
4129 AV *av = (AV *)SvRV (self);
4130 SV *count_sv = AvARRAY (av)[0];
4131 IV count = SvIVX (count_sv);
4132
4133 if (count > 0)
4134 {
4135 --count;
4136 SvIVX (count_sv) = count;
4137 XSRETURN_YES;
4138 }
4139 else
4140 XSRETURN_NO;
4141}
4142
4143void
4144waiters (SV *self)
4145 PPCODE:
4146{
4147 AV *av = (AV *)SvRV (self);
4148 int wcount = AvFILLp (av) + 1 - 1;
4149
4150 if (GIMME_V == G_SCALAR)
4151 XPUSHs (sv_2mortal (newSViv (wcount)));
4152 else
4153 {
1232 int errorno; 4154 int i;
1233 int laststype; 4155 EXTEND (SP, wcount);
1234 int laststatval; 4156 for (i = 1; i <= wcount; ++i)
1235 Stat_t statcache; 4157 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1236 } *data = (void *)data_; 4158 }
1237
1238 errno = data->errorno;
1239 PL_laststype = data->laststype;
1240 PL_laststatval = data->laststatval;
1241 PL_statcache = data->statcache;
1242} 4159}
4160
4161MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4162
4163void
4164_may_delete (SV *sem, int count, unsigned int extra_refs)
4165 PPCODE:
4166{
4167 AV *av = (AV *)SvRV (sem);
4168
4169 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4170 && AvFILLp (av) == 0 /* no waiters, just count */
4171 && SvIV (AvARRAY (av)[0]) == count)
4172 XSRETURN_YES;
4173
4174 XSRETURN_NO;
4175}
4176
4177MODULE = Coro::State PACKAGE = Coro::Signal
4178
4179SV *
4180new (SV *klass)
4181 CODE:
4182 RETVAL = sv_bless (
4183 coro_waitarray_new (aTHX_ 0),
4184 GvSTASH (CvGV (cv))
4185 );
4186 OUTPUT:
4187 RETVAL
4188
4189void
4190wait (...)
4191 CODE:
4192 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4193
4194void
4195broadcast (SV *self)
4196 CODE:
4197{
4198 AV *av = (AV *)SvRV (self);
4199 coro_signal_wake (aTHX_ av, AvFILLp (av));
4200}
4201
4202void
4203send (SV *self)
4204 CODE:
4205{
4206 AV *av = (AV *)SvRV (self);
4207
4208 if (AvFILLp (av))
4209 coro_signal_wake (aTHX_ av, 1);
4210 else
4211 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4212}
4213
4214IV
4215awaited (SV *self)
4216 CODE:
4217 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4218 OUTPUT:
4219 RETVAL
4220
4221
4222MODULE = Coro::State PACKAGE = Coro::AnyEvent
4223
4224BOOT:
4225 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4226
4227void
4228_schedule (...)
4229 CODE:
4230{
4231 static int incede;
4232
4233 api_cede_notself (aTHX);
4234
4235 ++incede;
4236 while (coro_nready >= incede && api_cede (aTHX))
4237 ;
4238
4239 sv_setsv (sv_activity, &PL_sv_undef);
4240 if (coro_nready >= incede)
4241 {
4242 PUSHMARK (SP);
4243 PUTBACK;
4244 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4245 }
4246
4247 --incede;
4248}
4249
4250
4251MODULE = Coro::State PACKAGE = Coro::AIO
4252
4253void
4254_register (char *target, char *proto, SV *req)
4255 CODE:
4256{
4257 SV *req_cv = s_get_cv_croak (req);
4258 /* newXSproto doesn't return the CV on 5.8 */
4259 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4260 sv_setpv ((SV *)slf_cv, proto);
4261 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4262}
4263
4264MODULE = Coro::State PACKAGE = Coro::Select
4265
4266void
4267patch_pp_sselect ()
4268 CODE:
4269 if (!coro_old_pp_sselect)
4270 {
4271 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4272 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4273 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4274 }
4275
4276void
4277unpatch_pp_sselect ()
4278 CODE:
4279 if (coro_old_pp_sselect)
4280 {
4281 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4282 coro_old_pp_sselect = 0;
4283 }
4284
4285MODULE = Coro::State PACKAGE = Coro::Util
4286
4287void
4288_exit (int code)
4289 CODE:
4290 _exit (code);
4291
4292NV
4293time ()
4294 CODE:
4295 RETVAL = nvtime (aTHX);
4296 OUTPUT:
4297 RETVAL
4298
4299NV
4300gettimeofday ()
4301 PPCODE:
4302{
4303 UV tv [2];
4304 u2time (aTHX_ tv);
4305 EXTEND (SP, 2);
4306 PUSHs (sv_2mortal (newSVuv (tv [0])));
4307 PUSHs (sv_2mortal (newSVuv (tv [1])));
4308}
4309

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