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Comparing Coro/Coro/State.xs (file contents):
Revision 1.102 by root, Mon Nov 27 01:28:03 2006 UTC vs.
Revision 1.444 by root, Thu May 1 08:09:18 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
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#define PERL_VERSION_ATLEAST(a,b,c) \ 18#define ECB_NO_THREADS 1
10 (PERL_REVISION > (a) \ 19#define ECB_NO_LIBM 1
11 || (PERL_REVISION == (a) \ 20#include "ecb.h"
12 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14 21
15#if !PERL_VERSION_ATLEAST (5,6,0) 22#include <stddef.h>
16# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr
18# endif
19# ifndef call_sv
20# define call_sv perl_call_sv
21# endif
22# ifndef get_sv
23# define get_sv perl_get_sv
24# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif
28# ifndef IS_PADGV
29# define IS_PADGV(v) 0
30# endif
31# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0
33# endif
34#endif
35
36#include <stdio.h> 23#include <stdio.h>
37#include <errno.h> 24#include <errno.h>
38
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD
41#endif
42
43#ifndef STACKGUARD
44# define STACKGUARD 0
45#endif
46
47#ifdef HAVE_MMAP
48# include <unistd.h> 25#include <assert.h>
49# include <sys/mman.h> 26
50# ifndef MAP_ANONYMOUS 27#ifndef SVs_PADSTALE
51# ifdef MAP_ANON 28# define SVs_PADSTALE 0
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# 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;
56# endif 39# endif
57# include <limits.h> 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
58# ifndef PAGESIZE 41# define PadlistMAX(pl) AvFILLp (pl)
59# define PAGESIZE pagesize 42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 43# define PadARRAY AvARRAY
61static 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 */
62# else 60#else
63# 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;
64# endif 94# endif
65#endif 95#endif
66 96
67/* The next macro should declare a variable stacklevel that contains and approximation 97#ifdef __linux
68 * to the current C stack pointer. Its property is that it changes with each call 98# include <time.h> /* for timespec */
69 * and should be unique. */ 99# include <syscall.h> /* for SYS_* */
70#define dSTACKLEVEL int stacklevel 100# ifdef SYS_clock_gettime
71#define STACKLEVEL ((void *)&stacklevel) 101# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
72 102# define CORO_CLOCK_MONOTONIC 1
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 103# define CORO_CLOCK_THREAD_CPUTIME_ID 3
74
75#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x)
77#else
78# define attribute(x)
79#endif 104# endif
80
81#define NOINLINE attribute ((noinline))
82
83#include "CoroAPI.h"
84
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86
87#ifdef USE_ITHREADS
88static perl_mutex coro_mutex;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else
92# define LOCK (void)0
93# define UNLOCK (void)0
94#endif 105#endif
95 106
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;
96static struct CoroAPI coroapi; 117static struct CoroAPI coroapi;
97static 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;
98static HV *coro_state_stash, *coro_stash; 120static HV *coro_state_stash, *coro_stash;
99static 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};
100 162
101/* this is a structure representing a c-level coroutine */ 163/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 164typedef struct coro_cctx
165{
103 struct coro_stack *next; 166 struct coro_cctx *next;
104 167
105 /* the stack */ 168 /* the stack */
106 void *sptr; 169 struct coro_stack stack;
107 long ssize; /* positive == mmap, otherwise malloc */
108 170
109 /* cpu state */ 171 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 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
111 JMPENV *top_env; 176 JMPENV *top_env;
112 coro_context cctx; 177 coro_context cctx;
113} coro_stack; 178
179 U32 gen;
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))
114 211
115/* this is a structure representing a perl-level coroutine */ 212/* this is a structure representing a perl-level coroutine */
116struct coro { 213struct coro
214{
117 /* the c coroutine allocated to this perl coroutine, if any */ 215 /* the C coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 216 coro_cctx *cctx;
119 217
120 /* data associated with this coroutine (initial args) */ 218 /* ready queue */
121 AV *args; 219 struct coro *next_ready;
122 int refcnt;
123 220
124 /* optionally saved, might be zero */ 221 /* state data */
125 AV *defav; 222 struct CoroSLF slf_frame; /* saved slf frame */
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 223 AV *mainstack;
137 SV **stack_sp; 224 perl_slots *slot; /* basically the saved sp */
138 OP *op; 225
139 SV **curpad; 226 CV *startcv; /* the CV to execute */
140 AV *comppad; 227 AV *args; /* data associated with this coroutine (initial args) */
141 CV *compcv; 228 int flags; /* CF_ flags */
142 SV **stack_base; 229 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 230
144 SV **tmps_stack; 231 /* statistics */
145 I32 tmps_floor; 232 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 233
163 /* coro process data */ 234 /* coro process data */
164 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;
165}; 258};
166 259
167typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
169 262
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... */
170static 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 *
171coro_clone_padlist (CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
172{ 519{
173 AV *padlist = CvPADLIST (cv); 520 PADLIST *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
175 524
176 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. */
177 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 554#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist);
185 555
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 556 /* Already extended to 2 elements by newPADLIST. */
187 av_store (newpadlist, 1, (SV *)newpad); 557 PadlistMAX (newpadlist) = 1;
558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
559 PadlistARRAY (newpadlist)[1] = newpad;
188 560
189 return newpadlist; 561 return newpadlist;
190} 562}
191 563
192static void 564ecb_inline void
193free_padlist (AV *padlist) 565free_padlist (pTHX_ PADLIST *padlist)
194{ 566{
195 /* may be during global destruction */ 567 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 568 if (!IN_DESTRUCT)
197 { 569 {
198 I32 i = AvFILLp (padlist); 570 I32 i = PadlistMAX (padlist);
199 while (i >= 0) 571
572 while (i > 0) /* special-case index 0 */
200 { 573 {
201 SV **svp = av_fetch (padlist, i--, FALSE); 574 /* we try to be extra-careful here */
575 PAD *pad = PadlistARRAY (padlist)[i--];
576
202 if (svp) 577 if (pad)
203 { 578 {
204 SV *sv; 579 I32 j = PadMAX (pad);
205 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 580
581 while (j >= 0)
206 SvREFCNT_dec (sv); 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
207 583
584 PadMAX (pad) = -1;
208 SvREFCNT_dec (*svp); 585 SvREFCNT_dec (pad);
209 } 586 }
210 } 587 }
211 588
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);
212 SvREFCNT_dec ((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
213 } 599 }
214} 600}
215 601
216static int 602static int
217coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
218{ 604{
219 AV *padlist; 605 PADLIST *padlist;
220 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;
221 608
222 /* casting is fun. */ 609 /* perl manages to free our internal AV and _then_ call us */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
224 free_padlist (padlist); 614 free_padlist (aTHX_ padlists[len]);
225
226 SvREFCNT_dec (av);
227 615
228 return 0; 616 return 0;
229} 617}
230 618
231#define PERL_MAGIC_coro PERL_MAGIC_ext 619static MGVTBL coro_cv_vtbl = {
232 620 0, 0, 0, 0,
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 621 coro_cv_free
622};
234 623
235/* the next two functions merely cache the padlists */ 624/* the next two functions merely cache the padlists */
236static void 625ecb_inline void
237get_padlist (CV *cv) 626get_padlist (pTHX_ CV *cv)
238{ 627{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 628 MAGIC *mg = CORO_MAGIC_cv (cv);
629 size_t *lenp;
240 630
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
243 else 633 else
244 { 634 {
245#if 0 635#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 638 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 639 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 640 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 641 SvREFCNT_dec (cp);
251#else 642#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
253#endif 644#endif
254 } 645 }
255} 646}
256 647
257static void 648ecb_inline void
258put_padlist (CV *cv) 649put_padlist (pTHX_ CV *cv)
259{ 650{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 651 MAGIC *mg = CORO_MAGIC_cv (cv);
261 652
262 if (!mg) 653 if (ecb_expect_false (!mg))
263 {
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266 mg->mg_virtual = &vtbl_coro;
267 mg->mg_obj = (SV *)newAV ();
268 } 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);
269 663
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
271} 665}
272 666
273#define SB do { 667/** load & save, init *******************************************************/
274#define SE } while (0)
275 668
276#define LOAD(state) load_state((state)); 669ecb_inline void
277#define SAVE(state,flags) save_state((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;
278 674
279#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);
280 677
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 */
281static 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
282load_state(Coro__State c) 725load_perl (pTHX_ Coro__State c)
283{ 726{
284 PL_dowarn = c->dowarn; 727 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 728 c->slot = 0;
286 729
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 730 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 731
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 732#if CORO_JIT
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 733 load_perl_slots (slot);
320 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
321 738
322 { 739 {
323 dSP; 740 dSP;
741
324 CV *cv; 742 CV *cv;
325 743
326 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
328 { 746 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 748 CvDEPTH (cv) = PTR2IV (POPs);
335 } 749 CvPADLIST (cv) = (PADLIST *)POPs;
336
337 ++CvDEPTH(cv);
338 } 750 }
339 751
340 PUTBACK; 752 PUTBACK;
341 } 753 }
342}
343 754
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
344static void 777static void
345save_state(Coro__State c, int flags) 778save_perl (pTHX_ Coro__State c)
346{ 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
347 { 801 {
348 dSP; 802 dSP;
349 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 807 /*
354 * 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
355 * (and reinitialize) all cv's in the whole callchain :( 809 * (and reinitialize) all cv's in the whole callchain :(
356 */ 810 */
357 811
358 PUSHs (Nullsv); 812 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
360 for (;;) 814 for (;;)
361 { 815 {
362 while (cxix >= 0) 816 while (ecb_expect_true (cxix >= 0))
363 { 817 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
365 819
366 if (CxTYPE(cx) == CXt_SUB) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 821 {
368 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
823
369 if (CvDEPTH(cv)) 824 if (ecb_expect_true (CvDEPTH (cv)))
370 { 825 {
371 EXTEND (SP, CvDEPTH(cv)*2); 826 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
382 830
831 CvDEPTH (cv) = 0;
383 get_padlist (cv); 832 get_padlist (aTHX_ cv);
384 } 833 }
385 } 834 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 835 }
395 836
396 if (top_si->si_type == PERLSI_MAIN) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 838 break;
398 839
399 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
402 } 843 }
403 844
404 PUTBACK; 845 PUTBACK;
405 } 846 }
406 847
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 848 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 850 {
851 unsigned int i;
410 852
411 c->dowarn = PL_dowarn; 853 for (i = 0; i < SLOT_COUNT; ++i)
412 c->in_eval = PL_in_eval; 854 CXINC;
413 855
414 c->curstackinfo = PL_curstackinfo; 856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
415 c->curstack = PL_curstack; 857 }
858
416 c->mainstack = PL_mainstack; 859 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 860
418 c->op = PL_op; 861 {
419 c->curpad = PL_curpad; 862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 863
421 c->compcv = PL_compcv; 864#if CORO_JIT
422 c->stack_base = PL_stack_base; 865 save_perl_slots (slot);
423 c->stack_max = PL_stack_max; 866#else
424 c->tmps_stack = PL_tmps_stack; 867 #define VARx(name,expr,type) slot->name = expr;
425 c->tmps_floor = PL_tmps_floor; 868 #include "state.h"
426 c->tmps_ix = PL_tmps_ix;
427 c->tmps_max = PL_tmps_max;
428 c->markstack = PL_markstack;
429 c->markstack_ptr = PL_markstack_ptr;
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif 869#endif
442 c->curpm = PL_curpm; 870 }
443 c->curcop = PL_curcop;
444} 871}
445 872
446/* 873/*
447 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 876 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 877 * not usually need a lot of stackspace.
451 */ 878 */
879#if CORO_PREFER_PERL_FUNCTIONS
880# define coro_init_stacks(thx) init_stacks ()
881#else
452static void 882static void
453coro_init_stacks () 883coro_init_stacks (pTHX)
454{ 884{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
456 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 889
460 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 891 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 892 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 893
464 New(50,PL_tmps_stack,96,SV*); 894 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 895 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 896 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 897 PL_tmps_max = 32;
468 898
469 New(54,PL_markstack,16,I32); 899 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 900 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 901 PL_markstack_max = PL_markstack + 16;
472 902
473#ifdef SET_MARK_OFFSET 903#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 904 SET_MARK_OFFSET;
475#endif 905#endif
476 906
477 New(54,PL_scopestack,16,I32); 907 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
479 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
480 913
481 New(54,PL_savestack,96,ANY); 914 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 916 PL_savestack_max = 24;
484 917
485#if !PERL_VERSION_ATLEAST (5,9,0) 918#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 919 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 921 PL_retstack_max = 4;
489#endif 922#endif
490} 923}
924#endif
491 925
492/* 926/*
493 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
494 */ 928 */
495static void 929static void
496coro_destroy_stacks() 930coro_destruct_stacks (pTHX)
497{ 931{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
511 934
512 while (PL_curstackinfo) 935 while (PL_curstackinfo)
513 { 936 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 937 PERL_SI *p = PL_curstackinfo->si_prev;
515 938
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 939 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 940 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 941
528 Safefree (PL_curstackinfo->si_cxstack); 942 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 943 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 944 PL_curstackinfo = p;
531 } 945 }
532 946
533 Safefree (PL_tmps_stack); 947 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 948 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
536 Safefree (PL_savestack); 953 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 954#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 955 Safefree (PL_retstack);
539#endif 956#endif
540} 957}
541 958
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
542static void 1097static int
543setup_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)
544{ 1113{
545 /* 1114 /*
546 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
547 */ 1116 */
548
549 coro_init_stacks (); 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);
550 1146
551 { 1147 {
552 dSP; 1148 dSP;
553 LOGOP myop; 1149 UNOP myop;
554 1150
555 /*PL_curcop = 0;*/
556 PL_in_eval = 0;
557 SvREFCNT_dec (GvAV (PL_defgv));
558 GvAV (PL_defgv) = coro->args; coro->args = 0;
559
560 SPAGAIN;
561
562 Zero (&myop, 1, LOGOP); 1151 Zero (&myop, 1, UNOP);
563 myop.op_next = Nullop; 1152 myop.op_next = Nullop;
1153 myop.op_type = OP_ENTERSUB;
564 myop.op_flags = OPf_WANT_VOID; 1154 myop.op_flags = OPf_WANT_VOID;
565 1155
1156 PUSHMARK (SP);
1157 PUSHs ((SV *)coro->startcv);
1158 PUTBACK;
566 PL_op = (OP *)&myop; 1159 PL_op = (OP *)&myop;
567
568 PUSHMARK (SP);
569 PUSHMARK (SP);
570 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
571 PUTBACK;
572 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1160 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
573 SPAGAIN;
574
575 ENTER; /* necessary e.g. for dounwind */
576 } 1161 }
577}
578 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
579static void 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
580free_coro_mortal () 1267free_coro_mortal (pTHX)
581{ 1268{
582 if (coro_mortal) 1269 if (ecb_expect_true (coro_mortal))
583 { 1270 {
584 SvREFCNT_dec (coro_mortal); 1271 SvREFCNT_dec ((SV *)coro_mortal);
585 coro_mortal = 0; 1272 coro_mortal = 0;
586 } 1273 }
587} 1274}
588 1275
589static void NOINLINE
590prepare_cctx (coro_stack *cctx)
591{
592 dSP;
593 LOGOP myop;
594
595 Zero (&myop, 1, LOGOP);
596 myop.op_next = PL_op;
597 myop.op_flags = OPf_WANT_VOID;
598
599 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
600
601 PUSHMARK (SP);
602 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
603 PUTBACK;
604 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
605 SPAGAIN;
606}
607
608static void 1276static int
609coro_run (void *arg) 1277runops_trace (pTHX)
610{ 1278{
611 /* coro_run is the alternative epilogue of transfer() */ 1279 COP *oldcop = 0;
612 UNLOCK; 1280 int oldcxix = -2;
613 1281
614 /* 1282 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
615 * this is a _very_ stripped down perl interpreter ;) 1283 {
616 */ 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{
617 PL_top_env = &PL_start_env; 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
618 /* inject call to cctx_init */ 1471 /* inject a fake subroutine call to cctx_init */
619 prepare_cctx ((coro_stack *)arg); 1472 cctx_prepare (aTHX);
620 1473
1474 /* cctx_run is the alternative tail of transfer() */
1475 transfer_tail (aTHX);
1476
621 /* somebody will hit me for both perl_run and PL_restartop */ 1477 /* somebody or something will hit me for both perl_run and PL_restartop */
1478 PL_restartop = PL_op;
622 perl_run (PL_curinterp); 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 */
623 1485
624 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1486 /*
625 abort (); 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 }
626} 1494}
627 1495
628static coro_stack * 1496static coro_cctx *
629stack_new () 1497cctx_new (void)
630{ 1498{
631 coro_stack *stack; 1499 coro_cctx *cctx;
632 1500
1501 ++cctx_count;
633 New (0, stack, 1, coro_stack); 1502 New (0, cctx, 1, coro_cctx);
634 1503
635#if HAVE_MMAP 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 */
636 1507
637 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1508 return cctx;
638 /* mmap suppsedly does allocate-on-write for us */ 1509}
639 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640 1510
641 if (stack->sptr == (void *)-1) 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))
642 { 1530 {
643 perror ("FATAL: unable to mmap stack for coroutine"); 1531 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
644 _exit (EXIT_FAILURE); 1532 _exit (EXIT_FAILURE);
645 } 1533 }
646 1534
647# if STACKGUARD 1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
648 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
649# endif
650 1536
651#else
652
653 stack->ssize = STACKSIZE * (long)sizeof (long);
654 New (0, stack->sptr, STACKSIZE, long);
655
656 if (!stack->sptr)
657 {
658 perror (stderr, "FATAL: unable to malloc stack for coroutine");
659 _exit (EXIT_FAILURE);
660 }
661
662#endif
663
664 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
665
666 return stack; 1537 return cctx;
667} 1538}
668 1539
669static void 1540static void
670stack_free (coro_stack *stack) 1541cctx_destroy (coro_cctx *cctx)
671{ 1542{
672 if (!stack) 1543 if (!cctx)
673 return; 1544 return;
674 1545
675#if HAVE_MMAP 1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
676 munmap (stack->sptr, stack->ssize);
677#else
678 Safefree (stack->sptr);
679#endif
680 1547
1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
1550
1551 coro_stack_free (&cctx->stack);
1552
681 Safefree (stack); 1553 Safefree (cctx);
682} 1554}
683 1555
684static coro_stack *stack_first; 1556/* wether this cctx should be destructed */
685static int cctx_count, cctx_idle; 1557#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
686 1558
687static coro_stack * 1559static coro_cctx *
688stack_get () 1560cctx_get (pTHX)
689{ 1561{
690 coro_stack *stack; 1562 while (ecb_expect_true (cctx_first))
691
692 if (stack_first)
693 { 1563 {
1564 coro_cctx *cctx = cctx_first;
1565 cctx_first = cctx->next;
694 --cctx_idle; 1566 --cctx_idle;
695 stack = stack_first; 1567
696 stack_first = stack->next; 1568 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
697 } 1569 return cctx;
698 else 1570
699 { 1571 cctx_destroy (cctx);
700 ++cctx_count;
701 stack = stack_new ();
702 PL_op = PL_op->op_next;
703 } 1572 }
704 1573
705 return stack; 1574 return cctx_new_run ();
706} 1575}
707 1576
708static void 1577static void
709stack_put (coro_stack *stack) 1578cctx_put (coro_cctx *cctx)
710{ 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
711 ++cctx_idle; 1592 ++cctx_idle;
712 stack->next = stack_first; 1593 cctx->next = cctx_first;
713 stack_first = stack; 1594 cctx_first = cctx;
714} 1595}
715 1596
716/* never call directly, always through the coro_state_transfer global variable */ 1597/** coroutine switching *****************************************************/
717static void NOINLINE 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 */
718transfer (struct coro *prev, struct coro *next, int flags) 1621transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
719{ 1622{
720 dSTACKLEVEL; 1623 dSTACKLEVEL;
721 1624
722 /* sometimes transfer is only called to set idle_sp */ 1625 /* sometimes transfer is only called to set idle_sp */
723 if (flags == TRANSFER_SET_STACKLEVEL) 1626 if (ecb_expect_false (!prev))
724 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1627 {
725 else if (prev != next) 1628 cctx_current->idle_sp = STACKLEVEL;
1629 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
726 { 1630 }
727 coro_stack *prev__stack; 1631 else if (ecb_expect_true (prev != next))
1632 {
1633 coro_cctx *cctx_prev;
728 1634
729 LOCK; 1635 if (ecb_expect_false (prev->flags & CF_NEW))
730
731 if (next->mainstack)
732 { 1636 {
733 /* coroutine already started */ 1637 /* create a new empty/source context */
734 SAVE (prev, flags); 1638 prev->flags &= ~CF_NEW;
735 LOAD (next); 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);
736 } 1654 }
737 else 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 ))
738 { 1664 {
739 /* need to start coroutine */ 1665 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
740 /* first get rid of the old state */ 1666 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
741 SAVE (prev, -1); 1667
742 /* setup coroutine call */ 1668 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
743 setup_coro (next); 1669 /* without this the next cctx_get might destroy the running cctx while still in use */
744 /* need a stack */ 1670 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
745 next->stack = 0; 1671 if (ecb_expect_true (!next->cctx))
1672 next->cctx = cctx_get (aTHX);
1673
1674 cctx_put (cctx_current);
746 } 1675 }
1676 else
1677 prev->cctx = cctx_current;
747 1678
748 if (!prev->stack) 1679 ++next->usecount;
749 /* create a new empty context */
750 Newz (0, prev->stack, 1, coro_stack);
751 1680
752 prev__stack = prev->stack; 1681 cctx_prev = cctx_current;
1682 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
753 1683
754 /* possibly "free" the stack */ 1684 next->cctx = 0;
755 if (prev__stack->idle_sp == STACKLEVEL) 1685
1686 if (ecb_expect_false (cctx_prev != cctx_current))
756 { 1687 {
757 stack_put (prev__stack); 1688 cctx_prev->top_env = PL_top_env;
758 prev->stack = 0; 1689 PL_top_env = cctx_current->top_env;
1690 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
759 } 1691 }
760 1692
761 if (!next->stack) 1693 transfer_tail (aTHX);
762 next->stack = stack_get ();
763
764 if (prev__stack != next->stack)
765 {
766 prev__stack->top_env = PL_top_env;
767 PL_top_env = next->stack->top_env;
768 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
769 }
770
771 free_coro_mortal ();
772
773 UNLOCK;
774 } 1694 }
775} 1695}
776 1696
777struct transfer_args 1697#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
778{
779 struct coro *prev, *next;
780 int flags;
781};
782
783#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1698#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
784 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 */
785static void 1704static void
1705coro_call_on_destroy (pTHX_ struct coro *coro);
1706
1707static void
786coro_state_destroy (struct coro *coro) 1708coro_state_destroy (pTHX_ struct coro *coro)
787{ 1709{
788 if (coro->refcnt--) 1710 if (coro->flags & CF_ZOMBIE)
789 return; 1711 return;
790 1712
791 if (coro->mainstack && coro->mainstack != main_mainstack) 1713 slf_destroy (aTHX_ coro);
792 {
793 struct coro temp;
794 1714
795 SAVE ((&temp), TRANSFER_SAVE_ALL); 1715 coro->flags |= CF_ZOMBIE;
796 LOAD (coro);
797 1716
798 coro_destroy_stacks (); 1717 if (coro->flags & CF_READY)
799
800 LOAD ((&temp)); /* this will get rid of defsv etc.. */
801
802 coro->mainstack = 0;
803 } 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 */
804 1725
805 stack_free (coro->stack); 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);
806 SvREFCNT_dec (coro->args); 1738 SvREFCNT_dec (coro->args);
807 Safefree (coro); 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 */
808} 1745}
809 1746
810static int 1747static int
811coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1748coro_state_free (pTHX_ SV *sv, MAGIC *mg)
812{ 1749{
813 struct coro *coro = (struct coro *)mg->mg_ptr; 1750 struct coro *coro = (struct coro *)mg->mg_ptr;
814 mg->mg_ptr = 0; 1751 mg->mg_ptr = 0;
815 1752
816 coro_state_destroy (coro); 1753 coro_state_destroy (aTHX_ coro);
1754 SvREFCNT_dec (coro->on_destroy);
1755 SvREFCNT_dec (coro->status);
1756
1757 Safefree (coro);
817 1758
818 return 0; 1759 return 0;
819} 1760}
820 1761
821static int 1762static int ecb_cold
822coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1763coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
823{ 1764{
824 struct coro *coro = (struct coro *)mg->mg_ptr; 1765 /* called when perl clones the current process the slow way (windows process emulation) */
825 1766 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
826 ++coro->refcnt; 1767 mg->mg_ptr = 0;
1768 mg->mg_virtual = 0;
827 1769
828 return 0; 1770 return 0;
829} 1771}
830 1772
831static MGVTBL coro_state_vtbl = { 1773static MGVTBL coro_state_vtbl = {
832 0, 0, 0, 0, 1774 0, 0, 0, 0,
833 coro_state_clear, 1775 coro_state_free,
834 0, 1776 0,
835#ifdef MGf_DUP 1777#ifdef MGf_DUP
836 coro_state_dup, 1778 coro_state_dup,
837#else 1779#else
838# define MGf_DUP 0 1780# define MGf_DUP 0
839#endif 1781#endif
840}; 1782};
841 1783
842static struct coro *
843SvSTATE (SV *coro)
844{
845 HV *stash;
846 MAGIC *mg;
847
848 if (SvROK (coro))
849 coro = SvRV (coro);
850
851 stash = SvSTASH (coro);
852 if (stash != coro_stash && stash != coro_state_stash)
853 {
854 /* very slow, but rare, check */
855 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
856 croak ("Coro::State object required");
857 }
858
859 mg = SvMAGIC (coro);
860 assert (mg->mg_type == PERL_MAGIC_ext);
861 return (struct coro *)mg->mg_ptr;
862}
863
864static void 1784static void
865prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1785prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
866{ 1786{
867 ta->prev = SvSTATE (prev); 1787 ta->prev = SvSTATE (prev_sv);
868 ta->next = SvSTATE (next); 1788 ta->next = SvSTATE (next_sv);
869 ta->flags = flags; 1789 TRANSFER_CHECK (*ta);
870} 1790}
871 1791
872static void 1792static void
873api_transfer (SV *prev, SV *next, int flags) 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)
874{ 1837{
875 dTHX; 1838 dTHX;
1839 dSP;
1840
1841 ENTER;
1842 SAVETMPS;
1843
1844 PUSHMARK (SP);
1845 PUTBACK;
1846 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1847
1848 FREETMPS;
1849 LEAVE;
1850}
1851
1852static int
1853api_ready (pTHX_ SV *coro_sv)
1854{
1855 struct coro *coro = SvSTATE (coro_sv);
1856
1857 if (coro->flags & CF_READY)
1858 return 0;
1859
1860 coro->flags |= CF_READY;
1861
1862 coro_enq (aTHX_ coro);
1863
1864 if (!coro_nready++)
1865 if (coroapi.readyhook)
1866 coroapi.readyhook ();
1867
1868 return 1;
1869}
1870
1871static int
1872api_is_ready (pTHX_ SV *coro_sv)
1873{
1874 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1875}
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 (;;)
1898 {
1899 struct coro *next = coro_deq (aTHX);
1900
1901 if (ecb_expect_true (next))
1902 {
1903 /* cannot transfer to destroyed coros, skip and look for next */
1904 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
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 }
1914 }
1915 else
1916 {
1917 /* nothing to schedule: call the idle handler */
1918 if (SvROK (sv_idle)
1919 && SvOBJECT (SvRV (sv_idle)))
1920 {
1921 if (SvRV (sv_idle) == SvRV (coro_current))
1922 {
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 }
1960 }
1961 }
1962}
1963
1964ecb_inline void
1965prepare_cede (pTHX_ struct coro_transfer_args *ta)
1966{
1967 api_ready (aTHX_ coro_current);
1968 prepare_schedule (aTHX_ ta);
1969}
1970
1971ecb_inline void
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{
876 struct transfer_args ta; 1988 struct coro_transfer_args ta;
877 1989
878 prepare_transfer (&ta, prev, next, flags); 1990 prepare_schedule (aTHX_ &ta);
879 TRANSFER (ta); 1991 TRANSFER (ta, 1);
880} 1992}
881 1993
882/** Coro ********************************************************************/ 1994static void
1995api_schedule_to (pTHX_ SV *coro_sv)
1996{
1997 struct coro_transfer_args ta;
1998 struct coro *next = SvSTATE (coro_sv);
883 1999
884#define PRIO_MAX 3 2000 SvREFCNT_inc_NN (coro_sv);
885#define PRIO_HIGH 1 2001 prepare_schedule_to (aTHX_ &ta, next);
886#define PRIO_NORMAL 0 2002}
887#define PRIO_LOW -1
888#define PRIO_IDLE -3
889#define PRIO_MIN -4
890 2003
891/* for Coro.pm */
892static GV *coro_current, *coro_idle;
893static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
894static int coro_nready;
895
896static void 2004static int
897coro_enq (SV *sv) 2005api_cede (pTHX)
898{ 2006{
899 int prio; 2007 struct coro_transfer_args ta;
900 2008
901 if (SvTYPE (sv) != SVt_PVHV) 2009 prepare_cede (aTHX_ &ta);
902 croak ("Coro::ready tried to enqueue something that is not a coroutine");
903 2010
904 prio = SvSTATE (sv)->prio; 2011 if (ecb_expect_true (ta.prev != ta.next))
2012 {
2013 TRANSFER (ta, 1);
2014 return 1;
2015 }
2016 else
2017 return 0;
2018}
905 2019
906 av_push (coro_ready [prio - PRIO_MIN], sv); 2020static int
2021api_cede_notself (pTHX)
2022{
907 coro_nready++; 2023 if (coro_nready)
908} 2024 {
2025 struct coro_transfer_args ta;
909 2026
910static SV * 2027 prepare_cede_notself (aTHX_ &ta);
911coro_deq (int min_prio) 2028 TRANSFER (ta, 1);
912{ 2029 return 1;
913 int prio = PRIO_MAX - PRIO_MIN; 2030 }
2031 else
2032 return 0;
2033}
914 2034
915 min_prio -= PRIO_MIN; 2035static void
916 if (min_prio < 0) 2036api_trace (pTHX_ SV *coro_sv, int flags)
917 min_prio = 0; 2037{
2038 struct coro *coro = SvSTATE (coro_sv);
918 2039
919 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2040 if (coro->flags & CF_RUNNING)
920 if (AvFILLp (coro_ready [prio]) >= 0) 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
921 { 2073 {
922 coro_nready--; 2074 int i;
923 return av_shift (coro_ready [prio]); 2075 EXTEND (SP, AvFILLp (av) + 1);
2076
2077 for (i = 0; i <= AvFILLp (av); ++i)
2078 PUSHs (AvARRAY (av)[i]);
924 } 2079 }
2080
2081 PUTBACK;
2082 }
2083}
2084
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);
925 2113
926 return 0; 2114 return 0;
927} 2115}
928 2116
929static void 2117static void
930api_ready (SV *coro) 2118slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
931{ 2119{
932 dTHX; 2120 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
933 2121
934 if (SvROK (coro)) 2122 if (items > 1)
935 coro = SvRV (coro); 2123 croak ("join called with too many arguments");
936 2124
937 LOCK; 2125 if (coro->status)
938 coro_enq (SvREFCNT_inc (coro)); 2126 frame->prepare = prepare_nop;
939 UNLOCK; 2127 else
940} 2128 {
941 2129 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
942static void 2130 frame->prepare = prepare_schedule;
943prepare_schedule (struct transfer_args *ta)
944{
945 SV *current, *prev, *next;
946
947 current = GvSV (coro_current);
948
949 for (;;)
950 { 2131 }
951 LOCK;
952 next = coro_deq (PRIO_MIN);
953 UNLOCK;
954 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
2158 {
2159 dSP; /* don't disturb outer sp */
2160 PUSHMARK (SP);
2161
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);
2171 }
2172 }
2173}
2174
2175static void
2176coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2177{
2178 AV *av;
2179
2180 if (coro->status)
2181 {
2182 av = coro->status;
2183 av_clear (av);
2184 }
2185 else
2186 av = coro->status = newAV ();
2187
2188 /* items are actually not so common, so optimise for this case */
2189 if (items)
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
955 if (next) 2254 if (!self)
956 break; 2255 croak ("Coro::cancel called outside of thread content,");
2256
2257 /* otherwise we cancel directly, purely for speed reasons
2258 * unfortunately, this requires some magic trickery, as
2259 * somebody else could cancel us, so we have to fight the cancellation.
2260 * this is ugly, and hopefully fully worth the extra speed.
2261 * besides, I can't get the slow-but-safe version working...
2262 */
2263 slf_frame.data = 0;
2264 self->flags |= CF_NOCANCEL;
2265 coro_state_destroy (aTHX_ coro);
2266 self->flags &= ~CF_NOCANCEL;
2267
2268 if (slf_frame.data)
2269 {
2270 /* while we were busy we have been cancelled, so terminate */
2271 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2272 }
2273 else
2274 {
2275 frame->prepare = prepare_nop;
2276 frame->check = slf_check_nop;
2277 }
2278 }
2279}
2280
2281static int
2282slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2283{
2284 frame->prepare = 0;
2285 coro_unwind_stacks (aTHX);
2286
2287 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2288
2289 return 1;
2290}
2291
2292static int
2293safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2294{
2295 if (coro->cctx)
2296 croak ("coro inside C callback, unable to cancel at this time, caught");
2297
2298 if (coro->flags & CF_NEW)
2299 {
2300 coro_set_status (aTHX_ coro, arg, items);
2301 coro_state_destroy (aTHX_ coro);
2302 }
2303 else
2304 {
2305 if (!coro->slf_frame.prepare)
2306 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2307
2308 slf_destroy (aTHX_ coro);
2309
2310 coro_set_status (aTHX_ coro, arg, items);
2311 coro->slf_frame.prepare = prepare_nop;
2312 coro->slf_frame.check = slf_check_safe_cancel;
2313
2314 api_ready (aTHX_ (SV *)coro->hv);
2315 }
2316
2317 return 1;
2318}
2319
2320/*****************************************************************************/
2321/* async pool handler */
2322
2323static int
2324slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2325{
2326 HV *hv = (HV *)SvRV (coro_current);
2327 struct coro *coro = (struct coro *)frame->data;
2328
2329 if (!coro->invoke_cb)
2330 return 1; /* loop till we have invoke */
2331 else
2332 {
2333 hv_store (hv, "desc", sizeof ("desc") - 1,
2334 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2335
2336 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
957 2337
958 { 2338 {
959 dSP; 2339 dSP;
960 2340 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
961 ENTER;
962 SAVETMPS;
963
964 PUSHMARK (SP);
965 PUTBACK; 2341 PUTBACK;
966 call_sv (GvSV (coro_idle), G_DISCARD);
967
968 FREETMPS;
969 LEAVE;
970 } 2342 }
2343
2344 SvREFCNT_dec (GvAV (PL_defgv));
2345 GvAV (PL_defgv) = coro->invoke_av;
2346 coro->invoke_av = 0;
2347
2348 return 0;
2349 }
2350}
2351
2352static void
2353slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2354{
2355 HV *hv = (HV *)SvRV (coro_current);
2356 struct coro *coro = SvSTATE_hv ((SV *)hv);
2357
2358 if (ecb_expect_true (coro->saved_deffh))
971 } 2359 {
2360 /* subsequent iteration */
2361 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2362 coro->saved_deffh = 0;
972 2363
973 prev = SvRV (current); 2364 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
974 SvRV (current) = next; 2365 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2366 {
2367 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2368 return;
2369 }
2370 else
2371 {
2372 av_clear (GvAV (PL_defgv));
2373 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
975 2374
976 /* free this only after the transfer */ 2375 coro->prio = 0;
977 LOCK;
978 free_coro_mortal ();
979 UNLOCK;
980 coro_mortal = prev;
981 2376
982 ta->prev = SvSTATE (prev); 2377 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
983 ta->next = SvSTATE (next); 2378 api_trace (aTHX_ coro_current, 0);
984 ta->flags = TRANSFER_SAVE_ALL;
985}
986 2379
2380 frame->prepare = prepare_schedule;
2381 av_push (av_async_pool, SvREFCNT_inc (hv));
2382 }
2383 }
2384 else
2385 {
2386 /* first iteration, simply fall through */
2387 frame->prepare = prepare_nop;
2388 }
2389
2390 frame->check = slf_check_pool_handler;
2391 frame->data = (void *)coro;
2392}
2393
2394/*****************************************************************************/
2395/* rouse callback */
2396
2397#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2398
2399static void
2400coro_rouse_callback (pTHX_ CV *cv)
2401{
2402 dXSARGS;
2403 SV *data = (SV *)S_GENSUB_ARG;
2404
2405 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2406 {
2407 /* first call, set args */
2408 SV *coro = SvRV (data);
2409 AV *av = newAV ();
2410
2411 SvRV_set (data, (SV *)av);
2412
2413 /* better take a full copy of the arguments */
2414 while (items--)
2415 av_store (av, items, newSVsv (ST (items)));
2416
2417 api_ready (aTHX_ coro);
2418 SvREFCNT_dec (coro);
2419 }
2420
2421 XSRETURN_EMPTY;
2422}
2423
987static void 2424static int
2425slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2426{
2427 SV *data = (SV *)frame->data;
2428
2429 if (CORO_THROW)
2430 return 0;
2431
2432 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2433 return 1;
2434
2435 /* now push all results on the stack */
2436 {
2437 dSP;
2438 AV *av = (AV *)SvRV (data);
2439 int i;
2440
2441 EXTEND (SP, AvFILLp (av) + 1);
2442 for (i = 0; i <= AvFILLp (av); ++i)
2443 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2444
2445 /* we have stolen the elements, so set length to zero and free */
2446 AvFILLp (av) = -1;
2447 av_undef (av);
2448
2449 PUTBACK;
2450 }
2451
2452 return 0;
2453}
2454
2455static void
2456slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2457{
2458 SV *cb;
2459
2460 if (items)
2461 cb = arg [0];
2462 else
2463 {
2464 struct coro *coro = SvSTATE_current;
2465
2466 if (!coro->rouse_cb)
2467 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2468
2469 cb = sv_2mortal (coro->rouse_cb);
2470 coro->rouse_cb = 0;
2471 }
2472
2473 if (!SvROK (cb)
2474 || SvTYPE (SvRV (cb)) != SVt_PVCV
2475 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2476 croak ("Coro::rouse_wait called with illegal callback argument,");
2477
2478 {
2479 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2480 SV *data = (SV *)S_GENSUB_ARG;
2481
2482 frame->data = (void *)data;
2483 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2484 frame->check = slf_check_rouse_wait;
2485 }
2486}
2487
2488static SV *
2489coro_new_rouse_cb (pTHX)
2490{
2491 HV *hv = (HV *)SvRV (coro_current);
2492 struct coro *coro = SvSTATE_hv (hv);
2493 SV *data = newRV_inc ((SV *)hv);
2494 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2495
2496 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2497 SvREFCNT_dec (data); /* magicext increases the refcount */
2498
2499 SvREFCNT_dec (coro->rouse_cb);
2500 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2501
2502 return cb;
2503}
2504
2505/*****************************************************************************/
2506/* schedule-like-function opcode (SLF) */
2507
2508static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2509static const CV *slf_cv;
2510static SV **slf_argv;
2511static int slf_argc, slf_arga; /* count, allocated */
2512static I32 slf_ax; /* top of stack, for restore */
2513
2514/* this restores the stack in the case we patched the entersub, to */
2515/* recreate the stack frame as perl will on following calls */
2516/* since entersub cleared the stack */
2517static OP *
2518pp_restore (pTHX)
2519{
2520 int i;
2521 SV **SP = PL_stack_base + slf_ax;
2522
2523 PUSHMARK (SP);
2524
2525 EXTEND (SP, slf_argc + 1);
2526
2527 for (i = 0; i < slf_argc; ++i)
2528 PUSHs (sv_2mortal (slf_argv [i]));
2529
2530 PUSHs ((SV *)CvGV (slf_cv));
2531
2532 RETURNOP (slf_restore.op_first);
2533}
2534
2535static void
2536slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2537{
2538 SV **arg = (SV **)slf_frame.data;
2539
2540 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2541}
2542
2543static void
2544slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2545{
2546 if (items != 2)
2547 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2548
2549 frame->prepare = slf_prepare_transfer;
2550 frame->check = slf_check_nop;
2551 frame->data = (void *)arg; /* let's hope it will stay valid */
2552}
2553
2554static void
2555slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2556{
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_nop;
2559}
2560
2561static void
988prepare_cede (struct transfer_args *ta) 2562slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
989{ 2563{
990 LOCK; 2564 struct coro *next = (struct coro *)slf_frame.data;
991 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
992 UNLOCK;
993 2565
2566 SvREFCNT_inc_NN (next->hv);
994 prepare_schedule (ta); 2567 prepare_schedule_to (aTHX_ ta, next);
995} 2568}
996 2569
997static void 2570static void
998api_schedule (void) 2571slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
999{ 2572{
1000 dTHX; 2573 if (!items)
2574 croak ("Coro::schedule_to expects a coroutine argument, caught");
2575
2576 frame->data = (void *)SvSTATE (arg [0]);
2577 frame->prepare = slf_prepare_schedule_to;
2578 frame->check = slf_check_nop;
2579}
2580
2581static void
2582slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2583{
2584 api_ready (aTHX_ SvRV (coro_current));
2585
2586 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2587}
2588
2589static void
2590slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2591{
2592 frame->prepare = prepare_cede;
2593 frame->check = slf_check_nop;
2594}
2595
2596static void
2597slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2598{
2599 frame->prepare = prepare_cede_notself;
2600 frame->check = slf_check_nop;
2601}
2602
2603/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2604static void
2605slf_destroy (pTHX_ struct coro *coro)
2606{
2607 struct CoroSLF frame = coro->slf_frame;
2608
2609 /*
2610 * The on_destroy below most likely is from an SLF call.
2611 * Since by definition the SLF call will not finish when we destroy
2612 * the coro, we will have to force-finish it here, otherwise
2613 * cleanup functions cannot call SLF functions.
2614 */
2615 coro->slf_frame.prepare = 0;
2616
2617 /* this callback is reserved for slf functions needing to do cleanup */
2618 if (frame.destroy && frame.prepare && !PL_dirty)
2619 frame.destroy (aTHX_ &frame);
2620}
2621
2622/*
2623 * these not obviously related functions are all rolled into one
2624 * function to increase chances that they all will call transfer with the same
2625 * stack offset
2626 * SLF stands for "schedule-like-function".
2627 */
2628static OP *
2629pp_slf (pTHX)
2630{
2631 I32 checkmark; /* mark SP to see how many elements check has pushed */
2632
2633 /* set up the slf frame, unless it has already been set-up */
2634 /* the latter happens when a new coro has been started */
2635 /* or when a new cctx was attached to an existing coroutine */
2636 if (ecb_expect_true (!slf_frame.prepare))
2637 {
2638 /* first iteration */
2639 dSP;
2640 SV **arg = PL_stack_base + TOPMARK + 1;
2641 int items = SP - arg; /* args without function object */
2642 SV *gv = *sp;
2643
2644 /* do a quick consistency check on the "function" object, and if it isn't */
2645 /* for us, divert to the real entersub */
2646 if (SvTYPE (gv) != SVt_PVGV
2647 || !GvCV (gv)
2648 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2649 return PL_ppaddr[OP_ENTERSUB](aTHX);
2650
2651 if (!(PL_op->op_flags & OPf_STACKED))
2652 {
2653 /* ampersand-form of call, use @_ instead of stack */
2654 AV *av = GvAV (PL_defgv);
2655 arg = AvARRAY (av);
2656 items = AvFILLp (av) + 1;
2657 }
2658
2659 /* now call the init function, which needs to set up slf_frame */
2660 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2661 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2662
2663 /* pop args */
2664 SP = PL_stack_base + POPMARK;
2665
2666 PUTBACK;
2667 }
2668
2669 /* now that we have a slf_frame, interpret it! */
2670 /* we use a callback system not to make the code needlessly */
2671 /* complicated, but so we can run multiple perl coros from one cctx */
2672
2673 do
2674 {
1001 struct transfer_args ta; 2675 struct coro_transfer_args ta;
1002 2676
1003 prepare_schedule (&ta); 2677 slf_frame.prepare (aTHX_ &ta);
1004 TRANSFER (ta); 2678 TRANSFER (ta, 0);
1005}
1006 2679
2680 checkmark = PL_stack_sp - PL_stack_base;
2681 }
2682 while (slf_frame.check (aTHX_ &slf_frame));
2683
2684 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2685
2686 /* exception handling */
2687 if (ecb_expect_false (CORO_THROW))
2688 {
2689 SV *exception = sv_2mortal (CORO_THROW);
2690
2691 CORO_THROW = 0;
2692 sv_setsv (ERRSV, exception);
2693 croak (0);
2694 }
2695
2696 /* return value handling - mostly like entersub */
2697 /* make sure we put something on the stack in scalar context */
2698 if (GIMME_V == G_SCALAR
2699 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2700 {
2701 dSP;
2702 SV **bot = PL_stack_base + checkmark;
2703
2704 if (sp == bot) /* too few, push undef */
2705 bot [1] = &PL_sv_undef;
2706 else /* too many, take last one */
2707 bot [1] = *sp;
2708
2709 SP = bot + 1;
2710
2711 PUTBACK;
2712 }
2713
2714 return NORMAL;
2715}
2716
2717static void
2718api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2719{
2720 int i;
2721 SV **arg = PL_stack_base + ax;
2722 int items = PL_stack_sp - arg + 1;
2723
2724 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2725
2726 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2727 && PL_op->op_ppaddr != pp_slf)
2728 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2729
2730 CvFLAGS (cv) |= CVf_SLF;
2731 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2732 slf_cv = cv;
2733
2734 /* we patch the op, and then re-run the whole call */
2735 /* we have to put the same argument on the stack for this to work */
2736 /* and this will be done by pp_restore */
2737 slf_restore.op_next = (OP *)&slf_restore;
2738 slf_restore.op_type = OP_CUSTOM;
2739 slf_restore.op_ppaddr = pp_restore;
2740 slf_restore.op_first = PL_op;
2741
2742 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2743
2744 if (PL_op->op_flags & OPf_STACKED)
2745 {
2746 if (items > slf_arga)
2747 {
2748 slf_arga = items;
2749 Safefree (slf_argv);
2750 New (0, slf_argv, slf_arga, SV *);
2751 }
2752
2753 slf_argc = items;
2754
2755 for (i = 0; i < items; ++i)
2756 slf_argv [i] = SvREFCNT_inc (arg [i]);
2757 }
2758 else
2759 slf_argc = 0;
2760
2761 PL_op->op_ppaddr = pp_slf;
2762 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2763
2764 PL_op = (OP *)&slf_restore;
2765}
2766
2767/*****************************************************************************/
2768/* dynamic wind */
2769
2770static void
2771on_enterleave_call (pTHX_ SV *cb)
2772{
2773 dSP;
2774
2775 PUSHSTACK;
2776
2777 PUSHMARK (SP);
2778 PUTBACK;
2779 call_sv (cb, G_VOID | G_DISCARD);
2780 SPAGAIN;
2781
2782 POPSTACK;
2783}
2784
2785static SV *
2786coro_avp_pop_and_free (pTHX_ AV **avp)
2787{
2788 AV *av = *avp;
2789 SV *res = av_pop (av);
2790
2791 if (AvFILLp (av) < 0)
2792 {
2793 *avp = 0;
2794 SvREFCNT_dec (av);
2795 }
2796
2797 return res;
2798}
2799
2800static void
2801coro_pop_on_enter (pTHX_ void *coro)
2802{
2803 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2804 SvREFCNT_dec (cb);
2805}
2806
2807static void
2808coro_pop_on_leave (pTHX_ void *coro)
2809{
2810 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2811 on_enterleave_call (aTHX_ sv_2mortal (cb));
2812}
2813
2814/*****************************************************************************/
2815/* PerlIO::cede */
2816
2817typedef struct
2818{
2819 PerlIOBuf base;
2820 NV next, every;
2821} PerlIOCede;
2822
2823static IV ecb_cold
2824PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2825{
2826 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2827
2828 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2829 self->next = nvtime () + self->every;
2830
2831 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2832}
2833
2834static SV * ecb_cold
2835PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2836{
2837 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2838
2839 return newSVnv (self->every);
2840}
2841
2842static IV
2843PerlIOCede_flush (pTHX_ PerlIO *f)
2844{
2845 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2846 double now = nvtime ();
2847
2848 if (now >= self->next)
2849 {
2850 api_cede (aTHX);
2851 self->next = now + self->every;
2852 }
2853
2854 return PerlIOBuf_flush (aTHX_ f);
2855}
2856
2857static PerlIO_funcs PerlIO_cede =
2858{
2859 sizeof(PerlIO_funcs),
2860 "cede",
2861 sizeof(PerlIOCede),
2862 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2863 PerlIOCede_pushed,
2864 PerlIOBuf_popped,
2865 PerlIOBuf_open,
2866 PerlIOBase_binmode,
2867 PerlIOCede_getarg,
2868 PerlIOBase_fileno,
2869 PerlIOBuf_dup,
2870 PerlIOBuf_read,
2871 PerlIOBuf_unread,
2872 PerlIOBuf_write,
2873 PerlIOBuf_seek,
2874 PerlIOBuf_tell,
2875 PerlIOBuf_close,
2876 PerlIOCede_flush,
2877 PerlIOBuf_fill,
2878 PerlIOBase_eof,
2879 PerlIOBase_error,
2880 PerlIOBase_clearerr,
2881 PerlIOBase_setlinebuf,
2882 PerlIOBuf_get_base,
2883 PerlIOBuf_bufsiz,
2884 PerlIOBuf_get_ptr,
2885 PerlIOBuf_get_cnt,
2886 PerlIOBuf_set_ptrcnt,
2887};
2888
2889/*****************************************************************************/
2890/* Coro::Semaphore & Coro::Signal */
2891
2892static SV *
2893coro_waitarray_new (pTHX_ int count)
2894{
2895 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2896 AV *av = newAV ();
2897 SV **ary;
2898
2899 /* unfortunately, building manually saves memory */
2900 Newx (ary, 2, SV *);
2901 AvALLOC (av) = ary;
2902#if PERL_VERSION_ATLEAST (5,10,0)
2903 AvARRAY (av) = ary;
2904#else
2905 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2906 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2907 SvPVX ((SV *)av) = (char *)ary;
2908#endif
2909 AvMAX (av) = 1;
2910 AvFILLp (av) = 0;
2911 ary [0] = newSViv (count);
2912
2913 return newRV_noinc ((SV *)av);
2914}
2915
2916/* semaphore */
2917
2918static void
2919coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2920{
2921 SV *count_sv = AvARRAY (av)[0];
2922 IV count = SvIVX (count_sv);
2923
2924 count += adjust;
2925 SvIVX (count_sv) = count;
2926
2927 /* now wake up as many waiters as are expected to lock */
2928 while (count > 0 && AvFILLp (av) > 0)
2929 {
2930 SV *cb;
2931
2932 /* swap first two elements so we can shift a waiter */
2933 AvARRAY (av)[0] = AvARRAY (av)[1];
2934 AvARRAY (av)[1] = count_sv;
2935 cb = av_shift (av);
2936
2937 if (SvOBJECT (cb))
2938 {
2939 api_ready (aTHX_ cb);
2940 --count;
2941 }
2942 else if (SvTYPE (cb) == SVt_PVCV)
2943 {
2944 dSP;
2945 PUSHMARK (SP);
2946 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2947 PUTBACK;
2948 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2949 }
2950
2951 SvREFCNT_dec (cb);
2952 }
2953}
2954
2955static void
2956coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2957{
2958 /* call $sem->adjust (0) to possibly wake up some other waiters */
2959 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2960}
2961
1007static void 2962static int
1008api_cede (void) 2963slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1009{ 2964{
1010 dTHX; 2965 AV *av = (AV *)frame->data;
1011 struct transfer_args ta; 2966 SV *count_sv = AvARRAY (av)[0];
2967 SV *coro_hv = SvRV (coro_current);
1012 2968
1013 prepare_cede (&ta); 2969 frame->destroy = 0;
1014 TRANSFER (ta);
1015}
1016 2970
2971 /* if we are about to throw, don't actually acquire the lock, just throw */
2972 if (ecb_expect_false (CORO_THROW))
2973 {
2974 /* we still might be responsible for the semaphore, so wake up others */
2975 coro_semaphore_adjust (aTHX_ av, 0);
2976
2977 return 0;
2978 }
2979 else if (SvIVX (count_sv) > 0)
2980 {
2981 if (acquire)
2982 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2983 else
2984 coro_semaphore_adjust (aTHX_ av, 0);
2985
2986 return 0;
2987 }
2988 else
2989 {
2990 int i;
2991 /* if we were woken up but can't down, we look through the whole */
2992 /* waiters list and only add us if we aren't in there already */
2993 /* this avoids some degenerate memory usage cases */
2994 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2995 if (AvARRAY (av)[i] == coro_hv)
2996 return 1;
2997
2998 av_push (av, SvREFCNT_inc (coro_hv));
2999 return 1;
3000 }
3001}
3002
3003static int
3004slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3005{
3006 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3007}
3008
3009static int
3010slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3011{
3012 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3013}
3014
3015static void
3016slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3017{
3018 AV *av = (AV *)SvRV (arg [0]);
3019
3020 if (SvIVX (AvARRAY (av)[0]) > 0)
3021 {
3022 frame->data = (void *)av;
3023 frame->prepare = prepare_nop;
3024 }
3025 else
3026 {
3027 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3028
3029 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3030 frame->prepare = prepare_schedule;
3031 /* to avoid race conditions when a woken-up coro gets terminated */
3032 /* we arrange for a temporary on_destroy that calls adjust (0) */
3033 frame->destroy = coro_semaphore_destroy;
3034 }
3035}
3036
3037static void
3038slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3039{
3040 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3041 frame->check = slf_check_semaphore_down;
3042}
3043
3044static void
3045slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3046{
3047 if (items >= 2)
3048 {
3049 /* callback form */
3050 AV *av = (AV *)SvRV (arg [0]);
3051 SV *cb_cv = s_get_cv_croak (arg [1]);
3052
3053 av_push (av, SvREFCNT_inc_NN (cb_cv));
3054
3055 if (SvIVX (AvARRAY (av)[0]) > 0)
3056 coro_semaphore_adjust (aTHX_ av, 0);
3057
3058 frame->prepare = prepare_nop;
3059 frame->check = slf_check_nop;
3060 }
3061 else
3062 {
3063 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3064 frame->check = slf_check_semaphore_wait;
3065 }
3066}
3067
3068/* signal */
3069
3070static void
3071coro_signal_wake (pTHX_ AV *av, int count)
3072{
3073 SvIVX (AvARRAY (av)[0]) = 0;
3074
3075 /* now signal count waiters */
3076 while (count > 0 && AvFILLp (av) > 0)
3077 {
3078 SV *cb;
3079
3080 /* swap first two elements so we can shift a waiter */
3081 cb = AvARRAY (av)[0];
3082 AvARRAY (av)[0] = AvARRAY (av)[1];
3083 AvARRAY (av)[1] = cb;
3084
3085 cb = av_shift (av);
3086
3087 if (SvTYPE (cb) == SVt_PVCV)
3088 {
3089 dSP;
3090 PUSHMARK (SP);
3091 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3092 PUTBACK;
3093 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3094 }
3095 else
3096 {
3097 api_ready (aTHX_ cb);
3098 sv_setiv (cb, 0); /* signal waiter */
3099 }
3100
3101 SvREFCNT_dec (cb);
3102
3103 --count;
3104 }
3105}
3106
3107static int
3108slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3109{
3110 /* if we are about to throw, also stop waiting */
3111 return SvROK ((SV *)frame->data) && !CORO_THROW;
3112}
3113
3114static void
3115slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3116{
3117 AV *av = (AV *)SvRV (arg [0]);
3118
3119 if (items >= 2)
3120 {
3121 SV *cb_cv = s_get_cv_croak (arg [1]);
3122 av_push (av, SvREFCNT_inc_NN (cb_cv));
3123
3124 if (SvIVX (AvARRAY (av)[0]))
3125 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3126
3127 frame->prepare = prepare_nop;
3128 frame->check = slf_check_nop;
3129 }
3130 else if (SvIVX (AvARRAY (av)[0]))
3131 {
3132 SvIVX (AvARRAY (av)[0]) = 0;
3133 frame->prepare = prepare_nop;
3134 frame->check = slf_check_nop;
3135 }
3136 else
3137 {
3138 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3139
3140 av_push (av, waiter);
3141
3142 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3143 frame->prepare = prepare_schedule;
3144 frame->check = slf_check_signal_wait;
3145 }
3146}
3147
3148/*****************************************************************************/
3149/* Coro::AIO */
3150
3151#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3152
3153/* helper storage struct */
3154struct io_state
3155{
3156 int errorno;
3157 I32 laststype; /* U16 in 5.10.0 */
3158 int laststatval;
3159 Stat_t statcache;
3160};
3161
3162static void
3163coro_aio_callback (pTHX_ CV *cv)
3164{
3165 dXSARGS;
3166 AV *state = (AV *)S_GENSUB_ARG;
3167 SV *coro = av_pop (state);
3168 SV *data_sv = newSV (sizeof (struct io_state));
3169
3170 av_extend (state, items - 1);
3171
3172 sv_upgrade (data_sv, SVt_PV);
3173 SvCUR_set (data_sv, sizeof (struct io_state));
3174 SvPOK_only (data_sv);
3175
3176 {
3177 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3178
3179 data->errorno = errno;
3180 data->laststype = PL_laststype;
3181 data->laststatval = PL_laststatval;
3182 data->statcache = PL_statcache;
3183 }
3184
3185 /* now build the result vector out of all the parameters and the data_sv */
3186 {
3187 int i;
3188
3189 for (i = 0; i < items; ++i)
3190 av_push (state, SvREFCNT_inc_NN (ST (i)));
3191 }
3192
3193 av_push (state, data_sv);
3194
3195 api_ready (aTHX_ coro);
3196 SvREFCNT_dec (coro);
3197 SvREFCNT_dec ((AV *)state);
3198}
3199
3200static int
3201slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3202{
3203 AV *state = (AV *)frame->data;
3204
3205 /* if we are about to throw, return early */
3206 /* this does not cancel the aio request, but at least */
3207 /* it quickly returns */
3208 if (CORO_THROW)
3209 return 0;
3210
3211 /* one element that is an RV? repeat! */
3212 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3213 return 1;
3214
3215 /* restore status */
3216 {
3217 SV *data_sv = av_pop (state);
3218 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3219
3220 errno = data->errorno;
3221 PL_laststype = data->laststype;
3222 PL_laststatval = data->laststatval;
3223 PL_statcache = data->statcache;
3224
3225 SvREFCNT_dec (data_sv);
3226 }
3227
3228 /* push result values */
3229 {
3230 dSP;
3231 int i;
3232
3233 EXTEND (SP, AvFILLp (state) + 1);
3234 for (i = 0; i <= AvFILLp (state); ++i)
3235 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3236
3237 PUTBACK;
3238 }
3239
3240 return 0;
3241}
3242
3243static void
3244slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3245{
3246 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3247 SV *coro_hv = SvRV (coro_current);
3248 struct coro *coro = SvSTATE_hv (coro_hv);
3249
3250 /* put our coroutine id on the state arg */
3251 av_push (state, SvREFCNT_inc_NN (coro_hv));
3252
3253 /* first see whether we have a non-zero priority and set it as AIO prio */
3254 if (coro->prio)
3255 {
3256 dSP;
3257
3258 static SV *prio_cv;
3259 static SV *prio_sv;
3260
3261 if (ecb_expect_false (!prio_cv))
3262 {
3263 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3264 prio_sv = newSViv (0);
3265 }
3266
3267 PUSHMARK (SP);
3268 sv_setiv (prio_sv, coro->prio);
3269 XPUSHs (prio_sv);
3270
3271 PUTBACK;
3272 call_sv (prio_cv, G_VOID | G_DISCARD);
3273 }
3274
3275 /* now call the original request */
3276 {
3277 dSP;
3278 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3279 int i;
3280
3281 PUSHMARK (SP);
3282
3283 /* first push all args to the stack */
3284 EXTEND (SP, items + 1);
3285
3286 for (i = 0; i < items; ++i)
3287 PUSHs (arg [i]);
3288
3289 /* now push the callback closure */
3290 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3291
3292 /* now call the AIO function - we assume our request is uncancelable */
3293 PUTBACK;
3294 call_sv ((SV *)req, G_VOID | G_DISCARD);
3295 }
3296
3297 /* now that the request is going, we loop till we have a result */
3298 frame->data = (void *)state;
3299 frame->prepare = prepare_schedule;
3300 frame->check = slf_check_aio_req;
3301}
3302
3303static void
3304coro_aio_req_xs (pTHX_ CV *cv)
3305{
3306 dXSARGS;
3307
3308 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3309
3310 XSRETURN_EMPTY;
3311}
3312
3313/*****************************************************************************/
3314
3315#if CORO_CLONE
3316# include "clone.c"
3317#endif
3318
3319/*****************************************************************************/
3320
3321static SV *
3322coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3323{
3324 SV *coro_sv;
3325 struct coro *coro;
3326 MAGIC *mg;
3327 HV *hv;
3328 SV *cb;
3329 int i;
3330
3331 if (argc > 0)
3332 {
3333 cb = s_get_cv_croak (argv [0]);
3334
3335 if (!is_coro)
3336 {
3337 if (CvISXSUB (cb))
3338 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3339
3340 if (!CvROOT (cb))
3341 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3342 }
3343 }
3344
3345 Newz (0, coro, 1, struct coro);
3346 coro->args = newAV ();
3347 coro->flags = CF_NEW;
3348
3349 if (coro_first) coro_first->prev = coro;
3350 coro->next = coro_first;
3351 coro_first = coro;
3352
3353 coro->hv = hv = newHV ();
3354 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3355 mg->mg_flags |= MGf_DUP;
3356 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3357
3358 if (argc > 0)
3359 {
3360 av_extend (coro->args, argc + is_coro - 1);
3361
3362 if (is_coro)
3363 {
3364 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3365 cb = (SV *)cv_coro_run;
3366 }
3367
3368 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3369
3370 for (i = 1; i < argc; i++)
3371 av_push (coro->args, newSVsv (argv [i]));
3372 }
3373
3374 return coro_sv;
3375}
3376
3377#ifndef __cplusplus
3378ecb_cold XS(boot_Coro__State);
3379#endif
3380
3381#if CORO_JIT
3382
3383static void ecb_noinline ecb_cold
3384pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3385{
3386 dSP;
3387 AV *av = newAV ();
3388
3389 av_store (av, 3, newSVuv (d));
3390 av_store (av, 2, newSVuv (c));
3391 av_store (av, 1, newSVuv (b));
3392 av_store (av, 0, newSVuv (a));
3393
3394 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3395
3396 PUTBACK;
3397}
3398
3399static void ecb_noinline ecb_cold
3400jit_init (pTHX)
3401{
3402 dSP;
3403 SV *load, *save;
3404 char *map_base;
3405 char *load_ptr, *save_ptr;
3406 STRLEN load_len, save_len, map_len;
3407 int count;
3408
3409 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3410
3411 PUSHMARK (SP);
3412 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3413 #include "state.h"
3414 count = call_pv ("Coro::State::_jit", G_ARRAY);
3415 SPAGAIN;
3416
3417 save = POPs; save_ptr = SvPVbyte (save, save_len);
3418 load = POPs; load_ptr = SvPVbyte (load, load_len);
3419
3420 map_len = load_len + save_len + 16;
3421
3422 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3423
3424 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3425
3426 load_perl_slots = (load_save_perl_slots_type)map_base;
3427 memcpy (map_base, load_ptr, load_len);
3428
3429 map_base += (load_len + 15) & ~15;
3430
3431 save_perl_slots = (load_save_perl_slots_type)map_base;
3432 memcpy (map_base, save_ptr, save_len);
3433
3434 /* we are good citizens and try to make the page read-only, so the evil evil */
3435 /* hackers might have it a bit more difficult */
3436 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3437
3438 PUTBACK;
3439 eval_pv ("undef &Coro::State::_jit", 1);
3440}
3441
3442#endif
3443
1017MODULE = Coro::State PACKAGE = Coro::State 3444MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018 3445
1019PROTOTYPES: DISABLE 3446PROTOTYPES: DISABLE
1020 3447
1021BOOT: 3448BOOT:
1022{ 3449{
3450#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl");
3451#include "state.h"
1023#ifdef USE_ITHREADS 3452#ifdef USE_ITHREADS
1024 MUTEX_INIT (&coro_mutex); 3453# if CORO_PTHREAD
3454 coro_thx = PERL_GET_CONTEXT;
1025#endif 3455# endif
1026 BOOT_PAGESIZE; 3456#endif
3457 /* perl defines these to check for existance first, but why it doesn't */
3458 /* just create them one at init time is not clear to me, except for */
3459 /* programs trying to delete them, but... */
3460 /* anyway, we declare this as invalid and make sure they are initialised here */
3461 DEFSV;
3462 ERRSV;
3463
3464 cctx_current = cctx_new_empty ();
3465
3466 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3467 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3468
3469 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3470 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3471 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3472
3473 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3474 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3475 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1027 3476
1028 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3477 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029 3478
1030 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3479 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3480 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3481 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3482 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1033 3483
1034 main_mainstack = PL_mainstack; 3484 main_mainstack = PL_mainstack;
3485 main_top_env = PL_top_env;
1035 3486
3487 while (main_top_env->je_prev)
3488 main_top_env = main_top_env->je_prev;
3489
3490 {
3491 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3492
3493 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3494 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3495
3496 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3497 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3498 }
3499
1036 coroapi.ver = CORO_API_VERSION; 3500 coroapi.ver = CORO_API_VERSION;
3501 coroapi.rev = CORO_API_REVISION;
3502
1037 coroapi.transfer = api_transfer; 3503 coroapi.transfer = api_transfer;
1038 3504
3505 coroapi.sv_state = SvSTATE_;
3506 coroapi.execute_slf = api_execute_slf;
3507 coroapi.prepare_nop = prepare_nop;
3508 coroapi.prepare_schedule = prepare_schedule;
3509 coroapi.prepare_cede = prepare_cede;
3510 coroapi.prepare_cede_notself = prepare_cede_notself;
3511
3512 time_init (aTHX);
3513
1039 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3514 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3515#if CORO_JIT
3516 PUTBACK;
3517 jit_init (aTHX);
3518 SPAGAIN;
3519#endif
1040} 3520}
1041 3521
1042SV * 3522SV *
1043new (char *klass, ...) 3523new (SV *klass, ...)
3524 ALIAS:
3525 Coro::new = 1
1044 CODE: 3526 CODE:
1045{ 3527 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1046 struct coro *coro; 3528 OUTPUT:
1047 HV *hv; 3529 RETVAL
1048 int i;
1049 3530
1050 Newz (0, coro, 1, struct coro); 3531void
1051 coro->args = newAV (); 3532transfer (...)
3533 PROTOTYPE: $$
3534 CODE:
3535 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1052 3536
3537SV *
3538clone (Coro::State coro)
3539 CODE:
3540{
3541#if CORO_CLONE
3542 struct coro *ncoro = coro_clone (aTHX_ coro);
3543 MAGIC *mg;
3544 /* TODO: too much duplication */
1053 hv = newHV (); 3545 ncoro->hv = newHV ();
1054 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3546 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3547 mg->mg_flags |= MGf_DUP;
1055 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3548 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3549#else
3550 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3551#endif
3552}
3553 OUTPUT:
3554 RETVAL
1056 3555
1057 for (i = 1; i < items; i++) 3556int
1058 av_push (coro->args, newSVsv (ST (i))); 3557cctx_stacksize (int new_stacksize = 0)
3558 PROTOTYPE: ;$
3559 CODE:
3560 RETVAL = cctx_stacksize;
3561 if (new_stacksize)
3562 {
3563 cctx_stacksize = new_stacksize;
3564 ++cctx_gen;
3565 }
3566 OUTPUT:
3567 RETVAL
1059 3568
1060 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3569int
1061 /*coro->stack = 0;*/ 3570cctx_max_idle (int max_idle = 0)
3571 PROTOTYPE: ;$
3572 CODE:
3573 RETVAL = cctx_max_idle;
3574 if (max_idle > 1)
3575 cctx_max_idle = max_idle;
3576 OUTPUT:
3577 RETVAL
3578
3579int
3580cctx_count ()
3581 PROTOTYPE:
3582 CODE:
3583 RETVAL = cctx_count;
3584 OUTPUT:
3585 RETVAL
3586
3587int
3588cctx_idle ()
3589 PROTOTYPE:
3590 CODE:
3591 RETVAL = cctx_idle;
3592 OUTPUT:
3593 RETVAL
3594
3595void
3596list ()
3597 PROTOTYPE:
3598 PPCODE:
3599{
3600 struct coro *coro;
3601 for (coro = coro_first; coro; coro = coro->next)
3602 if (coro->hv)
3603 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3604}
3605
3606void
3607call (Coro::State coro, SV *coderef)
3608 ALIAS:
3609 eval = 1
3610 CODE:
3611{
3612 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3613 {
3614 struct coro *current = SvSTATE_current;
3615 struct CoroSLF slf_save;
3616
3617 if (current != coro)
3618 {
3619 PUTBACK;
3620 save_perl (aTHX_ current);
3621 load_perl (aTHX_ coro);
3622 /* the coro is most likely in an active SLF call.
3623 * while not strictly required (the code we execute is
3624 * not allowed to call any SLF functions), it's cleaner
3625 * to reinitialise the slf_frame and restore it later.
3626 * This might one day allow us to actually do SLF calls
3627 * from code executed here.
3628 */
3629 slf_save = slf_frame;
3630 slf_frame.prepare = 0;
3631 SPAGAIN;
3632 }
3633
3634 PUSHSTACK;
3635
3636 PUSHMARK (SP);
3637 PUTBACK;
3638
3639 if (ix)
3640 eval_sv (coderef, 0);
3641 else
3642 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3643
3644 POPSTACK;
3645 SPAGAIN;
3646
3647 if (current != coro)
3648 {
3649 PUTBACK;
3650 slf_frame = slf_save;
3651 save_perl (aTHX_ coro);
3652 load_perl (aTHX_ current);
3653 SPAGAIN;
3654 }
3655 }
3656}
3657
3658SV *
3659is_ready (Coro::State coro)
3660 PROTOTYPE: $
3661 ALIAS:
3662 is_ready = CF_READY
3663 is_running = CF_RUNNING
3664 is_new = CF_NEW
3665 is_destroyed = CF_ZOMBIE
3666 is_zombie = CF_ZOMBIE
3667 is_suspended = CF_SUSPENDED
3668 CODE:
3669 RETVAL = boolSV (coro->flags & ix);
3670 OUTPUT:
3671 RETVAL
3672
3673void
3674throw (SV *self, SV *exception = &PL_sv_undef)
3675 PROTOTYPE: $;$
3676 CODE:
3677{
3678 struct coro *coro = SvSTATE (self);
3679 struct coro *current = SvSTATE_current;
3680 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3681 SvREFCNT_dec (*exceptionp);
3682 SvGETMAGIC (exception);
3683 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3684
3685 api_ready (aTHX_ self);
3686}
3687
3688void
3689api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3690 PROTOTYPE: $;$
3691 C_ARGS: aTHX_ coro, flags
3692
3693SV *
3694has_cctx (Coro::State coro)
3695 PROTOTYPE: $
3696 CODE:
3697 /* maybe manage the running flag differently */
3698 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3699 OUTPUT:
3700 RETVAL
3701
3702int
3703is_traced (Coro::State coro)
3704 PROTOTYPE: $
3705 CODE:
3706 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3707 OUTPUT:
3708 RETVAL
3709
3710UV
3711rss (Coro::State coro)
3712 PROTOTYPE: $
3713 ALIAS:
3714 usecount = 1
3715 CODE:
3716 switch (ix)
3717 {
3718 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3719 case 1: RETVAL = coro->usecount; break;
3720 }
3721 OUTPUT:
3722 RETVAL
3723
3724void
3725force_cctx ()
3726 PROTOTYPE:
3727 CODE:
3728 cctx_current->idle_sp = 0;
3729
3730void
3731swap_defsv (Coro::State self)
3732 PROTOTYPE: $
3733 ALIAS:
3734 swap_defav = 1
3735 CODE:
3736 if (!self->slot)
3737 croak ("cannot swap state with coroutine that has no saved state,");
3738 else
3739 {
3740 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3741 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3742
3743 SV *tmp = *src; *src = *dst; *dst = tmp;
3744 }
3745
3746void
3747cancel (Coro::State self)
3748 CODE:
3749 coro_state_destroy (aTHX_ self);
3750
3751SV *
3752enable_times (int enabled = enable_times)
3753 CODE:
3754{
3755 RETVAL = boolSV (enable_times);
3756
3757 if (enabled != enable_times)
3758 {
3759 enable_times = enabled;
3760
3761 coro_times_update ();
3762 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3763 }
1062} 3764}
1063 OUTPUT: 3765 OUTPUT:
1064 RETVAL 3766 RETVAL
1065 3767
1066void 3768void
1067_set_stacklevel (...) 3769times (Coro::State self)
1068 ALIAS: 3770 PPCODE:
1069 Coro::State::transfer = 1
1070 Coro::schedule = 2
1071 Coro::cede = 3
1072 Coro::Cont::yield = 4
1073 CODE:
1074{ 3771{
1075 struct transfer_args ta; 3772 struct coro *current = SvSTATE (coro_current);
1076 3773
1077 switch (ix) 3774 if (ecb_expect_false (current == self))
1078 { 3775 {
1079 case 0: 3776 coro_times_update ();
1080 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3777 coro_times_add (SvSTATE (coro_current));
1081 ta.next = 0;
1082 ta.flags = TRANSFER_SET_STACKLEVEL;
1083 break;
1084
1085 case 1:
1086 if (items != 3)
1087 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1088
1089 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1090 break;
1091
1092 case 2:
1093 prepare_schedule (&ta);
1094 break;
1095
1096 case 3:
1097 prepare_cede (&ta);
1098 break;
1099
1100 case 4:
1101 {
1102 SV *yieldstack;
1103 SV *sv;
1104 AV *defav = GvAV (PL_defgv);
1105
1106 yieldstack = *hv_fetch (
1107 (HV *)SvRV (GvSV (coro_current)),
1108 "yieldstack", sizeof ("yieldstack") - 1,
1109 0
1110 );
1111
1112 /* set up @_ -- ugly */
1113 av_clear (defav);
1114 av_fill (defav, items - 1);
1115 while (items--)
1116 av_store (defav, items, SvREFCNT_inc (ST(items)));
1117
1118 sv = av_pop ((AV *)SvRV (yieldstack));
1119 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1120 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1121 ta.flags = 0;
1122 SvREFCNT_dec (sv);
1123 }
1124 break;
1125
1126 } 3778 }
1127 3779
1128 TRANSFER (ta); 3780 EXTEND (SP, 2);
3781 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3782 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3783
3784 if (ecb_expect_false (current == self))
3785 coro_times_sub (SvSTATE (coro_current));
1129} 3786}
1130 3787
1131void 3788void
1132_clone_state_from (SV *dst, SV *src) 3789swap_sv (Coro::State coro, SV *sv, SV *swapsv)
1133 CODE: 3790 CODE:
1134{ 3791{
1135 struct coro *coro_src = SvSTATE (src); 3792 struct coro *current = SvSTATE_current;
1136 3793
1137 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3794 if (current == coro)
3795 SWAP_SVS (current);
1138 3796
1139 ++coro_src->refcnt; 3797 if (!coro->swap_sv)
1140 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 3798 coro->swap_sv = newAV ();
1141}
1142 3799
1143void 3800 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
1144_exit (code) 3801 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
1145 int code 3802
1146 PROTOTYPE: $ 3803 if (current == coro)
1147 CODE: 3804 SWAP_SVS (current);
1148 _exit (code); 3805}
3806
1149 3807
1150MODULE = Coro::State PACKAGE = Coro 3808MODULE = Coro::State PACKAGE = Coro
1151 3809
1152BOOT: 3810BOOT:
1153{ 3811{
1154 int i; 3812 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3813 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3814 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3815 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3816 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3817 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3818 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3819 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1155 3820
3821 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3822 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3823 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3824 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3825
1156 coro_stash = gv_stashpv ("Coro", TRUE); 3826 coro_stash = gv_stashpv ("Coro", TRUE);
1157 3827
1158 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3828 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1159 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3829 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1160 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3830 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1161 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3831 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1162 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3832 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1163 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3833 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1164
1165 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1166 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1167
1168 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1169 coro_ready[i] = newAV ();
1170 3834
1171 { 3835 {
1172 SV *sv = perl_get_sv("Coro::API", 1); 3836 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1173 3837
1174 coroapi.schedule = api_schedule; 3838 coroapi.schedule = api_schedule;
3839 coroapi.schedule_to = api_schedule_to;
1175 coroapi.cede = api_cede; 3840 coroapi.cede = api_cede;
3841 coroapi.cede_notself = api_cede_notself;
1176 coroapi.ready = api_ready; 3842 coroapi.ready = api_ready;
3843 coroapi.is_ready = api_is_ready;
1177 coroapi.nready = &coro_nready; 3844 coroapi.nready = coro_nready;
1178 coroapi.current = coro_current; 3845 coroapi.current = coro_current;
1179 3846
1180 GCoroAPI = &coroapi; 3847 /*GCoroAPI = &coroapi;*/
1181 sv_setiv (sv, (IV)&coroapi); 3848 sv_setiv (sv, (IV)&coroapi);
1182 SvREADONLY_on (sv); 3849 SvREADONLY_on (sv);
1183 } 3850 }
1184} 3851}
1185 3852
3853SV *
3854async (...)
3855 PROTOTYPE: &@
3856 CODE:
3857 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3858 api_ready (aTHX_ RETVAL);
3859 OUTPUT:
3860 RETVAL
3861
3862void
3863_destroy (Coro::State coro)
3864 CODE:
3865 /* used by the manager thread */
3866 coro_state_destroy (aTHX_ coro);
3867
3868void
3869on_destroy (Coro::State coro, SV *cb)
3870 CODE:
3871 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3872
3873void
3874join (...)
3875 CODE:
3876 CORO_EXECUTE_SLF_XS (slf_init_join);
3877
3878void
3879terminate (...)
3880 CODE:
3881 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3882
3883void
3884cancel (...)
3885 CODE:
3886 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3887
3888int
3889safe_cancel (Coro::State self, ...)
3890 C_ARGS: aTHX_ self, &ST (1), items - 1
3891
3892void
3893schedule (...)
3894 CODE:
3895 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3896
3897void
3898schedule_to (...)
3899 CODE:
3900 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3901
3902void
3903cede_to (...)
3904 CODE:
3905 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3906
3907void
3908cede (...)
3909 CODE:
3910 CORO_EXECUTE_SLF_XS (slf_init_cede);
3911
3912void
3913cede_notself (...)
3914 CODE:
3915 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3916
3917void
3918_set_current (SV *current)
3919 PROTOTYPE: $
3920 CODE:
3921 SvREFCNT_dec (SvRV (coro_current));
3922 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3923
3924void
3925_set_readyhook (SV *hook)
3926 PROTOTYPE: $
3927 CODE:
3928 SvREFCNT_dec (coro_readyhook);
3929 SvGETMAGIC (hook);
3930 if (SvOK (hook))
3931 {
3932 coro_readyhook = newSVsv (hook);
3933 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3934 }
3935 else
3936 {
3937 coro_readyhook = 0;
3938 CORO_READYHOOK = 0;
3939 }
3940
1186int 3941int
1187prio (Coro::State coro, int newprio = 0) 3942prio (Coro::State coro, int newprio = 0)
3943 PROTOTYPE: $;$
1188 ALIAS: 3944 ALIAS:
1189 nice = 1 3945 nice = 1
1190 CODE: 3946 CODE:
1191{ 3947{
1192 RETVAL = coro->prio; 3948 RETVAL = coro->prio;
1193 3949
1194 if (items > 1) 3950 if (items > 1)
1195 { 3951 {
1196 if (ix) 3952 if (ix)
1197 newprio += coro->prio; 3953 newprio = coro->prio - newprio;
1198 3954
1199 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3955 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1200 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3956 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1201 3957
1202 coro->prio = newprio; 3958 coro->prio = newprio;
1203 } 3959 }
1204} 3960}
3961 OUTPUT:
3962 RETVAL
1205 3963
1206void 3964SV *
1207ready (SV *self) 3965ready (SV *self)
1208 PROTOTYPE: $ 3966 PROTOTYPE: $
1209 CODE: 3967 CODE:
1210 api_ready (self); 3968 RETVAL = boolSV (api_ready (aTHX_ self));
3969 OUTPUT:
3970 RETVAL
1211 3971
1212int 3972int
1213nready (...) 3973nready (...)
1214 PROTOTYPE: 3974 PROTOTYPE:
1215 CODE: 3975 CODE:
1216 RETVAL = coro_nready; 3976 RETVAL = coro_nready;
1217 OUTPUT: 3977 OUTPUT:
1218 RETVAL 3978 RETVAL
1219 3979
1220MODULE = Coro::State PACKAGE = Coro::AIO 3980void
3981suspend (Coro::State self)
3982 PROTOTYPE: $
3983 CODE:
3984 self->flags |= CF_SUSPENDED;
3985
3986void
3987resume (Coro::State self)
3988 PROTOTYPE: $
3989 CODE:
3990 self->flags &= ~CF_SUSPENDED;
3991
3992void
3993_pool_handler (...)
3994 CODE:
3995 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3996
3997void
3998async_pool (SV *cv, ...)
3999 PROTOTYPE: &@
4000 PPCODE:
4001{
4002 HV *hv = (HV *)av_pop (av_async_pool);
4003 AV *av = newAV ();
4004 SV *cb = ST (0);
4005 int i;
4006
4007 av_extend (av, items - 2);
4008 for (i = 1; i < items; ++i)
4009 av_push (av, SvREFCNT_inc_NN (ST (i)));
4010
4011 if ((SV *)hv == &PL_sv_undef)
4012 {
4013 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4014 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4015 SvREFCNT_dec (sv);
4016 }
4017
4018 {
4019 struct coro *coro = SvSTATE_hv (hv);
4020
4021 assert (!coro->invoke_cb);
4022 assert (!coro->invoke_av);
4023 coro->invoke_cb = SvREFCNT_inc (cb);
4024 coro->invoke_av = av;
4025 }
4026
4027 api_ready (aTHX_ (SV *)hv);
4028
4029 if (GIMME_V != G_VOID)
4030 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4031 else
4032 SvREFCNT_dec (hv);
4033}
1221 4034
1222SV * 4035SV *
1223_get_state () 4036rouse_cb ()
4037 PROTOTYPE:
1224 CODE: 4038 CODE:
1225{ 4039 RETVAL = coro_new_rouse_cb (aTHX);
1226 struct {
1227 int errorno;
1228 int laststype;
1229 int laststatval;
1230 Stat_t statcache;
1231 } data;
1232
1233 data.errorno = errno;
1234 data.laststype = PL_laststype;
1235 data.laststatval = PL_laststatval;
1236 data.statcache = PL_statcache;
1237
1238 RETVAL = newSVpvn ((char *)&data, sizeof data);
1239}
1240 OUTPUT: 4040 OUTPUT:
1241 RETVAL 4041 RETVAL
1242 4042
1243void 4043void
1244_set_state (char *data_) 4044rouse_wait (...)
4045 PROTOTYPE: ;$
4046 PPCODE:
4047 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4048
4049void
4050on_enter (SV *block)
4051 ALIAS:
4052 on_leave = 1
1245 PROTOTYPE: $ 4053 PROTOTYPE: &
1246 CODE: 4054 CODE:
1247{ 4055{
1248 struct { 4056 struct coro *coro = SvSTATE_current;
4057 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4058
4059 block = s_get_cv_croak (block);
4060
4061 if (!*avp)
4062 *avp = newAV ();
4063
4064 av_push (*avp, SvREFCNT_inc (block));
4065
4066 if (!ix)
4067 on_enterleave_call (aTHX_ block);
4068
4069 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4070 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4071 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4072}
4073
4074
4075MODULE = Coro::State PACKAGE = PerlIO::cede
4076
4077BOOT:
4078 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4079
4080
4081MODULE = Coro::State PACKAGE = Coro::Semaphore
4082
4083SV *
4084new (SV *klass, SV *count = 0)
4085 CODE:
4086{
4087 int semcnt = 1;
4088
4089 if (count)
4090 {
4091 SvGETMAGIC (count);
4092
4093 if (SvOK (count))
4094 semcnt = SvIV (count);
4095 }
4096
4097 RETVAL = sv_bless (
4098 coro_waitarray_new (aTHX_ semcnt),
4099 GvSTASH (CvGV (cv))
4100 );
4101}
4102 OUTPUT:
4103 RETVAL
4104
4105# helper for Coro::Channel and others
4106SV *
4107_alloc (int count)
4108 CODE:
4109 RETVAL = coro_waitarray_new (aTHX_ count);
4110 OUTPUT:
4111 RETVAL
4112
4113SV *
4114count (SV *self)
4115 CODE:
4116 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4117 OUTPUT:
4118 RETVAL
4119
4120void
4121up (SV *self, int adjust = 1)
4122 ALIAS:
4123 adjust = 1
4124 CODE:
4125 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4126
4127void
4128down (...)
4129 CODE:
4130 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4131
4132void
4133wait (...)
4134 CODE:
4135 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4136
4137void
4138try (SV *self)
4139 PPCODE:
4140{
4141 AV *av = (AV *)SvRV (self);
4142 SV *count_sv = AvARRAY (av)[0];
4143 IV count = SvIVX (count_sv);
4144
4145 if (count > 0)
4146 {
4147 --count;
4148 SvIVX (count_sv) = count;
4149 XSRETURN_YES;
4150 }
4151 else
4152 XSRETURN_NO;
4153}
4154
4155void
4156waiters (SV *self)
4157 PPCODE:
4158{
4159 AV *av = (AV *)SvRV (self);
4160 int wcount = AvFILLp (av) + 1 - 1;
4161
4162 if (GIMME_V == G_SCALAR)
4163 XPUSHs (sv_2mortal (newSViv (wcount)));
4164 else
4165 {
1249 int errorno; 4166 int i;
1250 int laststype; 4167 EXTEND (SP, wcount);
1251 int laststatval; 4168 for (i = 1; i <= wcount; ++i)
1252 Stat_t statcache; 4169 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1253 } *data = (void *)data_; 4170 }
1254
1255 errno = data->errorno;
1256 PL_laststype = data->laststype;
1257 PL_laststatval = data->laststatval;
1258 PL_statcache = data->statcache;
1259} 4171}
4172
4173MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4174
4175void
4176_may_delete (SV *sem, int count, unsigned int extra_refs)
4177 PPCODE:
4178{
4179 AV *av = (AV *)SvRV (sem);
4180
4181 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4182 && AvFILLp (av) == 0 /* no waiters, just count */
4183 && SvIV (AvARRAY (av)[0]) == count)
4184 XSRETURN_YES;
4185
4186 XSRETURN_NO;
4187}
4188
4189MODULE = Coro::State PACKAGE = Coro::Signal
4190
4191SV *
4192new (SV *klass)
4193 CODE:
4194 RETVAL = sv_bless (
4195 coro_waitarray_new (aTHX_ 0),
4196 GvSTASH (CvGV (cv))
4197 );
4198 OUTPUT:
4199 RETVAL
4200
4201void
4202wait (...)
4203 CODE:
4204 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4205
4206void
4207broadcast (SV *self)
4208 CODE:
4209{
4210 AV *av = (AV *)SvRV (self);
4211 coro_signal_wake (aTHX_ av, AvFILLp (av));
4212}
4213
4214void
4215send (SV *self)
4216 CODE:
4217{
4218 AV *av = (AV *)SvRV (self);
4219
4220 if (AvFILLp (av))
4221 coro_signal_wake (aTHX_ av, 1);
4222 else
4223 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4224}
4225
4226IV
4227awaited (SV *self)
4228 CODE:
4229 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4230 OUTPUT:
4231 RETVAL
4232
4233
4234MODULE = Coro::State PACKAGE = Coro::AnyEvent
4235
4236BOOT:
4237 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4238
4239void
4240_schedule (...)
4241 CODE:
4242{
4243 static int incede;
4244
4245 api_cede_notself (aTHX);
4246
4247 ++incede;
4248 while (coro_nready >= incede && api_cede (aTHX))
4249 ;
4250
4251 sv_setsv (sv_activity, &PL_sv_undef);
4252 if (coro_nready >= incede)
4253 {
4254 PUSHMARK (SP);
4255 PUTBACK;
4256 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4257 }
4258
4259 --incede;
4260}
4261
4262
4263MODULE = Coro::State PACKAGE = Coro::AIO
4264
4265void
4266_register (char *target, char *proto, SV *req)
4267 CODE:
4268{
4269 SV *req_cv = s_get_cv_croak (req);
4270 /* newXSproto doesn't return the CV on 5.8 */
4271 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4272 sv_setpv ((SV *)slf_cv, proto);
4273 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4274}
4275
4276MODULE = Coro::State PACKAGE = Coro::Select
4277
4278void
4279patch_pp_sselect ()
4280 CODE:
4281 if (!coro_old_pp_sselect)
4282 {
4283 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4284 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4285 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4286 }
4287
4288void
4289unpatch_pp_sselect ()
4290 CODE:
4291 if (coro_old_pp_sselect)
4292 {
4293 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4294 coro_old_pp_sselect = 0;
4295 }
4296
4297MODULE = Coro::State PACKAGE = Coro::Util
4298
4299void
4300_exit (int code)
4301 CODE:
4302 _exit (code);
4303
4304NV
4305time ()
4306 CODE:
4307 RETVAL = nvtime (aTHX);
4308 OUTPUT:
4309 RETVAL
4310
4311NV
4312gettimeofday ()
4313 PPCODE:
4314{
4315 UV tv [2];
4316 u2time (aTHX_ tv);
4317 EXTEND (SP, 2);
4318 PUSHs (sv_2mortal (newSVuv (tv [0])));
4319 PUSHs (sv_2mortal (newSVuv (tv [1])));
4320}
4321

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