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Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.438 by root, Mon Nov 18 10:27:53 2013 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
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#include "ecb.h"
11 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14 20
15#if !PERL_VERSION_ATLEAST (5,6,0) 21#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> 22#include <stdio.h>
37#include <errno.h> 23#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> 24#include <assert.h>
49# include <sys/mman.h> 25
50# ifndef MAP_ANONYMOUS 26#ifndef SVs_PADSTALE
51# ifdef MAP_ANON 27# define SVs_PADSTALE 0
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
56# endif 38# endif
57# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
58# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
59# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
61static long pagesize; 43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
46
47/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
48/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
49#if PERL_VERSION_ATLEAST(5,19,0)
50# define SVt_BIND SVt_IV
51#endif
52
53#if defined(_WIN32)
54# undef HAS_GETTIMEOFDAY
55# undef setjmp
56# undef longjmp
57# undef _exit
58# define setjmp _setjmp /* deep magic */
62# else 59#else
63# define BOOT_PAGESIZE 60# include <inttypes.h> /* most portable stdint.h */
61#endif
62
63/* the maximum number of idle cctx that will be pooled */
64static int cctx_max_idle = 4;
65
66#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
67# define HAS_SCOPESTACK_NAME 1
68#endif
69
70/* prefer perl internal functions over our own? */
71#ifndef CORO_PREFER_PERL_FUNCTIONS
72# define CORO_PREFER_PERL_FUNCTIONS 0
73#endif
74
75/* The next macros try to return the current stack pointer, in an as
76 * portable way as possible. */
77#if __GNUC__ >= 4
78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
81# define dSTACKLEVEL volatile void *stacklevel
82# define STACKLEVEL ((void *)&stacklevel)
83#endif
84
85#define IN_DESTRUCT PL_dirty
86
87#include "CoroAPI.h"
88#define GCoroAPI (&coroapi) /* very sneaky */
89
90#ifdef USE_ITHREADS
91# if CORO_PTHREAD
92static void *coro_thx;
64# endif 93# endif
65#endif 94#endif
66 95
67/* The next macro should declare a variable stacklevel that contains and approximation 96#ifdef __linux
68 * to the current C stack pointer. Its property is that it changes with each call 97# include <time.h> /* for timespec */
69 * and should be unique. */ 98# include <syscall.h> /* for SYS_* */
70#define dSTACKLEVEL int stacklevel 99# ifdef SYS_clock_gettime
71#define STACKLEVEL ((void *)&stacklevel) 100# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
72 101# define CORO_CLOCK_MONOTONIC 1
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 102# 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 103# 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 104#endif
95 105
106static double (*nvtime)(); /* so why doesn't it take void? */
107static void (*u2time)(pTHX_ UV ret[2]);
108
109/* we hijack an hopefully unused CV flag for our purposes */
110#define CVf_SLF 0x4000
111static OP *pp_slf (pTHX);
112static void slf_destroy (pTHX_ struct coro *coro);
113
114static U32 cctx_gen;
115static size_t cctx_stacksize = CORO_STACKSIZE;
96static struct CoroAPI coroapi; 116static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 117static AV *main_mainstack; /* used to differentiate between $main and others */
118static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 119static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 120static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
121
122static AV *av_destroy; /* destruction queue */
123static SV *sv_manager; /* the manager coro */
124static SV *sv_idle; /* $Coro::idle */
125
126static GV *irsgv; /* $/ */
127static GV *stdoutgv; /* *STDOUT */
128static SV *rv_diehook;
129static SV *rv_warnhook;
130static HV *hv_sig; /* %SIG */
131
132/* async_pool helper stuff */
133static SV *sv_pool_rss;
134static SV *sv_pool_size;
135static SV *sv_async_pool_idle; /* description string */
136static AV *av_async_pool; /* idle pool */
137static SV *sv_Coro; /* class string */
138static CV *cv_pool_handler;
139
140/* Coro::AnyEvent */
141static SV *sv_activity;
142
143/* enable processtime/realtime profiling */
144static char enable_times;
145typedef U32 coro_ts[2];
146static coro_ts time_real, time_cpu;
147static char times_valid;
148
149static struct coro_cctx *cctx_first;
150static int cctx_count, cctx_idle;
151
152enum
153{
154 CC_MAPPED = 0x01,
155 CC_NOREUSE = 0x02, /* throw this away after tracing */
156 CC_TRACE = 0x04,
157 CC_TRACE_SUB = 0x08, /* trace sub calls */
158 CC_TRACE_LINE = 0x10, /* trace each statement */
159 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
160};
100 161
101/* this is a structure representing a c-level coroutine */ 162/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 163typedef struct coro_cctx
164{
103 struct coro_stack *next; 165 struct coro_cctx *next;
104 166
105 /* the stack */ 167 /* the stack */
106 void *sptr; 168 struct coro_stack stack;
107 long ssize; /* positive == mmap, otherwise malloc */
108 169
109 /* cpu state */ 170 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 171 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
172#ifndef NDEBUG
173 JMPENV *idle_te; /* same as idle_sp, but for top_env */
174#endif
111 JMPENV *top_env; 175 JMPENV *top_env;
112 coro_context cctx; 176 coro_context cctx;
113} coro_stack; 177
178 U32 gen;
179#if CORO_USE_VALGRIND
180 int valgrind_id;
181#endif
182 unsigned char flags;
183} coro_cctx;
184
185static coro_cctx *cctx_current; /* the currently running cctx */
186
187/*****************************************************************************/
188
189static MGVTBL coro_state_vtbl;
190
191enum
192{
193 CF_RUNNING = 0x0001, /* coroutine is running */
194 CF_READY = 0x0002, /* coroutine is ready */
195 CF_NEW = 0x0004, /* has never been switched to */
196 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
197 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
198 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
199};
200
201/* the structure where most of the perl state is stored, overlaid on the cxstack */
202typedef struct
203{
204 #define VARx(name,expr,type) type name;
205 #include "state.h"
206} perl_slots;
207
208/* how many context stack entries do we need for perl_slots */
209#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 210
115/* this is a structure representing a perl-level coroutine */ 211/* this is a structure representing a perl-level coroutine */
116struct coro { 212struct coro
213{
117 /* the c coroutine allocated to this perl coroutine, if any */ 214 /* the C coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 215 coro_cctx *cctx;
119 216
120 /* data associated with this coroutine (initial args) */ 217 /* ready queue */
121 AV *args; 218 struct coro *next_ready;
122 int refcnt;
123 219
124 /* optionally saved, might be zero */ 220 /* state data */
125 AV *defav; 221 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; 222 AV *mainstack;
137 SV **stack_sp; 223 perl_slots *slot; /* basically the saved sp */
138 OP *op; 224
139 SV **curpad; 225 CV *startcv; /* the CV to execute */
140 AV *comppad; 226 AV *args; /* data associated with this coroutine (initial args) */
141 CV *compcv; 227 int flags; /* CF_ flags */
142 SV **stack_base; 228 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 229
144 SV **tmps_stack; 230 /* statistics */
145 I32 tmps_floor; 231 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;
162 232
163 /* coro process data */ 233 /* coro process data */
164 int prio; 234 int prio;
235 SV *except; /* exception to be thrown */
236 SV *rouse_cb; /* last rouse callback */
237 AV *on_destroy; /* callbacks or coros to notify on destroy */
238 AV *status; /* the exit status list */
239
240 /* async_pool */
241 SV *saved_deffh;
242 SV *invoke_cb;
243 AV *invoke_av;
244
245 /* on_enter/on_leave */
246 AV *on_enter;
247 AV *on_leave;
248
249 /* swap_sv */
250 AV *swap_sv;
251
252 /* times */
253 coro_ts t_cpu, t_real;
254
255 /* linked list */
256 struct coro *next, *prev;
165}; 257};
166 258
167typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
169 261
262/* the following variables are effectively part of the perl context */
263/* and get copied between struct coro and these variables */
264/* the main reason we don't support windows process emulation */
265static struct CoroSLF slf_frame; /* the current slf frame */
266
267/** Coro ********************************************************************/
268
269#define CORO_PRIO_MAX 3
270#define CORO_PRIO_HIGH 1
271#define CORO_PRIO_NORMAL 0
272#define CORO_PRIO_LOW -1
273#define CORO_PRIO_IDLE -3
274#define CORO_PRIO_MIN -4
275
276/* for Coro.pm */
277static SV *coro_current;
278static SV *coro_readyhook;
279static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
280static CV *cv_coro_run;
281static struct coro *coro_first;
282#define coro_nready coroapi.nready
283
284/** JIT *********************************************************************/
285
286#if CORO_JIT
287 /* APPLE doesn't have mmap though */
288 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
289 #ifndef CORO_JIT_TYPE
290 #if ECB_AMD64 && CORO_JIT_UNIXY
291 #define CORO_JIT_TYPE "amd64-unix"
292 #elif __i386 && CORO_JIT_UNIXY
293 #define CORO_JIT_TYPE "x86-unix"
294 #endif
295 #endif
296#endif
297
298#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
299 #undef CORO_JIT
300#endif
301
302#if CORO_JIT
303 typedef void (*load_save_perl_slots_type)(perl_slots *);
304 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
305#endif
306
307/** Coro::Select ************************************************************/
308
309static OP *(*coro_old_pp_sselect) (pTHX);
310static SV *coro_select_select;
311
312/* horrible hack, but if it works... */
170static AV * 313static OP *
314coro_pp_sselect (pTHX)
315{
316 dSP;
317 PUSHMARK (SP - 4); /* fake argument list */
318 XPUSHs (coro_select_select);
319 PUTBACK;
320
321 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
322 PL_op->op_flags |= OPf_STACKED;
323 PL_op->op_private = 0;
324 return PL_ppaddr [OP_ENTERSUB](aTHX);
325}
326
327/** time stuff **************************************************************/
328
329#ifdef HAS_GETTIMEOFDAY
330
331ecb_inline void
332coro_u2time (pTHX_ UV ret[2])
333{
334 struct timeval tv;
335 gettimeofday (&tv, 0);
336
337 ret [0] = tv.tv_sec;
338 ret [1] = tv.tv_usec;
339}
340
341ecb_inline double
342coro_nvtime (void)
343{
344 struct timeval tv;
345 gettimeofday (&tv, 0);
346
347 return tv.tv_sec + tv.tv_usec * 1e-6;
348}
349
350ecb_inline void
351time_init (pTHX)
352{
353 nvtime = coro_nvtime;
354 u2time = coro_u2time;
355}
356
357#else
358
359ecb_inline void
360time_init (pTHX)
361{
362 SV **svp;
363
364 require_pv ("Time/HiRes.pm");
365
366 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
367
368 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
369 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
370
371 nvtime = INT2PTR (double (*)(), SvIV (*svp));
372
373 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
374 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
375}
376
377#endif
378
379/** lowlevel stuff **********************************************************/
380
381static SV * ecb_noinline
382coro_get_sv (pTHX_ const char *name, int create)
383{
384#if PERL_VERSION_ATLEAST (5,10,0)
385 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
386 get_sv (name, create);
387#endif
388 return get_sv (name, create);
389}
390
391static AV * ecb_noinline
392coro_get_av (pTHX_ const char *name, int create)
393{
394#if PERL_VERSION_ATLEAST (5,10,0)
395 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
396 get_av (name, create);
397#endif
398 return get_av (name, create);
399}
400
401static HV * ecb_noinline
402coro_get_hv (pTHX_ const char *name, int create)
403{
404#if PERL_VERSION_ATLEAST (5,10,0)
405 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
406 get_hv (name, create);
407#endif
408 return get_hv (name, create);
409}
410
411ecb_inline void
412coro_times_update (void)
413{
414#ifdef coro_clock_gettime
415 struct timespec ts;
416
417 ts.tv_sec = ts.tv_nsec = 0;
418 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
419 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
420
421 ts.tv_sec = ts.tv_nsec = 0;
422 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
423 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
424#else
425 dTHX;
426 UV tv[2];
427
428 u2time (aTHX_ tv);
429 time_real [0] = tv [0];
430 time_real [1] = tv [1] * 1000;
431#endif
432}
433
434ecb_inline void
435coro_times_add (struct coro *c)
436{
437 c->t_real [1] += time_real [1];
438 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
439 c->t_real [0] += time_real [0];
440
441 c->t_cpu [1] += time_cpu [1];
442 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
443 c->t_cpu [0] += time_cpu [0];
444}
445
446ecb_inline void
447coro_times_sub (struct coro *c)
448{
449 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
450 c->t_real [1] -= time_real [1];
451 c->t_real [0] -= time_real [0];
452
453 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
454 c->t_cpu [1] -= time_cpu [1];
455 c->t_cpu [0] -= time_cpu [0];
456}
457
458/*****************************************************************************/
459/* magic glue */
460
461#define CORO_MAGIC_type_cv 26
462#define CORO_MAGIC_type_state PERL_MAGIC_ext
463
464#define CORO_MAGIC_NN(sv, type) \
465 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
466 ? SvMAGIC (sv) \
467 : mg_find (sv, type))
468
469#define CORO_MAGIC(sv, type) \
470 (ecb_expect_true (SvMAGIC (sv)) \
471 ? CORO_MAGIC_NN (sv, type) \
472 : 0)
473
474#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
475#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
476
477ecb_inline MAGIC *
478SvSTATEhv_p (pTHX_ SV *coro)
479{
480 MAGIC *mg;
481
482 if (ecb_expect_true (
483 SvTYPE (coro) == SVt_PVHV
484 && (mg = CORO_MAGIC_state (coro))
485 && mg->mg_virtual == &coro_state_vtbl
486 ))
487 return mg;
488
489 return 0;
490}
491
492ecb_inline struct coro *
493SvSTATE_ (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (SvROK (coro))
498 coro = SvRV (coro);
499
500 mg = SvSTATEhv_p (aTHX_ coro);
501 if (!mg)
502 croak ("Coro::State object required");
503
504 return (struct coro *)mg->mg_ptr;
505}
506
507#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
508
509/* faster than SvSTATE, but expects a coroutine hv */
510#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
511#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
512
513/*****************************************************************************/
514/* padlist management and caching */
515
516ecb_inline PADLIST *
171coro_clone_padlist (CV *cv) 517coro_derive_padlist (pTHX_ CV *cv)
172{ 518{
173 AV *padlist = CvPADLIST (cv); 519 PADLIST *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 520 PADLIST *newpadlist;
521 PAD *newpad;
522 PADOFFSET off = PadlistMAX (padlist) + 1;
175 523
176 newpadlist = newAV (); 524#if NEWPADAPI
525
526 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
527 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
528 while (!PadlistARRAY (padlist)[off - 1])
529 --off;
530
531 Perl_pad_push (aTHX_ padlist, off);
532
533 newpad = PadlistARRAY (padlist)[off];
534 PadlistARRAY (padlist)[off] = 0;
535
536#else
537
538#if PERL_VERSION_ATLEAST (5,10,0)
539 Perl_pad_push (aTHX_ padlist, off);
540#else
541 Perl_pad_push (aTHX_ padlist, off, 1);
542#endif
543
544 newpad = PadlistARRAY (padlist)[off];
545 PadlistMAX (padlist) = off - 1;
546
547#endif
548
549 newPADLIST (newpadlist);
550#if !PERL_VERSION_ATLEAST(5,15,3)
551 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
177 AvREAL_off (newpadlist); 552 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 553#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist);
185 554
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 555 /* Already extended to 2 elements by newPADLIST. */
187 av_store (newpadlist, 1, (SV *)newpad); 556 PadlistMAX (newpadlist) = 1;
557 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
558 PadlistARRAY (newpadlist)[1] = newpad;
188 559
189 return newpadlist; 560 return newpadlist;
190} 561}
191 562
192static void 563ecb_inline void
193free_padlist (AV *padlist) 564free_padlist (pTHX_ PADLIST *padlist)
194{ 565{
195 /* may be during global destruction */ 566 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 567 if (!IN_DESTRUCT)
197 { 568 {
198 I32 i = AvFILLp (padlist); 569 I32 i = PadlistMAX (padlist);
199 while (i >= 0) 570
571 while (i > 0) /* special-case index 0 */
200 { 572 {
201 SV **svp = av_fetch (padlist, i--, FALSE); 573 /* we try to be extra-careful here */
574 PAD *pad = PadlistARRAY (padlist)[i--];
575
202 if (svp) 576 if (pad)
203 { 577 {
204 SV *sv; 578 I32 j = PadMAX (pad);
205 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 579
580 while (j >= 0)
206 SvREFCNT_dec (sv); 581 SvREFCNT_dec (PadARRAY (pad)[j--]);
207 582
583 PadMAX (pad) = -1;
208 SvREFCNT_dec (*svp); 584 SvREFCNT_dec (pad);
209 } 585 }
210 } 586 }
211 587
588 SvREFCNT_dec (PadlistNAMES (padlist));
589
590#if NEWPADAPI
591 Safefree (PadlistARRAY (padlist));
592 Safefree (padlist);
593#else
594 AvFILLp (padlist) = -1;
595 AvREAL_off (padlist);
212 SvREFCNT_dec ((SV*)padlist); 596 SvREFCNT_dec ((SV*)padlist);
597#endif
213 } 598 }
214} 599}
215 600
216static int 601static int
217coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 602coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
218{ 603{
219 AV *padlist; 604 PADLIST *padlist;
220 AV *av = (AV *)mg->mg_obj; 605 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
606 size_t len = *(size_t *)mg->mg_ptr;
221 607
222 /* casting is fun. */ 608 /* perl manages to free our internal AV and _then_ call us */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 609 if (IN_DESTRUCT)
610 return 0;
611
612 while (len--)
224 free_padlist (padlist); 613 free_padlist (aTHX_ padlists[len]);
225
226 SvREFCNT_dec (av);
227 614
228 return 0; 615 return 0;
229} 616}
230 617
231#define PERL_MAGIC_coro PERL_MAGIC_ext 618static MGVTBL coro_cv_vtbl = {
232 619 0, 0, 0, 0,
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 620 coro_cv_free
621};
234 622
235/* the next two functions merely cache the padlists */ 623/* the next two functions merely cache the padlists */
236static void 624ecb_inline void
237get_padlist (CV *cv) 625get_padlist (pTHX_ CV *cv)
238{ 626{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 627 MAGIC *mg = CORO_MAGIC_cv (cv);
628 size_t *lenp;
240 629
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 630 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 631 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
243 else 632 else
244 { 633 {
245#if 0 634#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 635 /* this is probably cleaner? but also slower! */
636 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 637 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 638 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 639 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 640 SvREFCNT_dec (cp);
251#else 641#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 642 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
253#endif 643#endif
254 } 644 }
255} 645}
256 646
257static void 647ecb_inline void
258put_padlist (CV *cv) 648put_padlist (pTHX_ CV *cv)
259{ 649{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 650 MAGIC *mg = CORO_MAGIC_cv (cv);
261 651
262 if (!mg) 652 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 } 653 {
654 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
655 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
656 mg->mg_len = 1; /* so mg_free frees mg_ptr */
657 }
658 else
659 Renew (mg->mg_ptr,
660 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
661 char);
269 662
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 663 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
271} 664}
272 665
273#define SB do { 666/** load & save, init *******************************************************/
274#define SE } while (0)
275 667
276#define LOAD(state) load_state((state)); 668ecb_inline void
277#define SAVE(state,flags) save_state((state),(flags)); 669swap_sv (SV *a, SV *b)
670{
671 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
672 SV tmp;
278 673
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 674 /* swap sv_any */
675 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
280 676
677 /* swap sv_flags */
678 SvFLAGS (&tmp) = SvFLAGS (a);
679 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
680 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
681
682#if PERL_VERSION_ATLEAST (5,10,0)
683 /* perl 5.10 and later complicates this _quite_ a bit, but it also
684 * is much faster, so no quarrels here. alternatively, we could
685 * sv_upgrade to avoid this.
686 */
687 {
688 /* swap sv_u */
689 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
690
691 /* if SvANY points to the head, we need to adjust the pointers,
692 * as the pointer for a still points to b, and maybe vice versa.
693 */
694 #define svany_in_head(type) \
695 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
696
697 if (svany_in_head (SvTYPE (a)))
698 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
699
700 if (svany_in_head (SvTYPE (b)))
701 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
702 }
703#endif
704}
705
706/* swap sv heads, at least logically */
281static void 707static void
708swap_svs (pTHX_ Coro__State c)
709{
710 int i;
711
712 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
713 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
714}
715
716#define SWAP_SVS(coro) \
717 if (ecb_expect_false ((coro)->swap_sv)) \
718 swap_svs (aTHX_ (coro))
719
720static void
721on_enterleave_call (pTHX_ SV *cb);
722
723static void
282load_state(Coro__State c) 724load_perl (pTHX_ Coro__State c)
283{ 725{
284 PL_dowarn = c->dowarn; 726 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 727 c->slot = 0;
286 728
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 729 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;
317 730
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 731#if CORO_JIT
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 732 load_perl_slots (slot);
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 733#else
734 #define VARx(name,expr,type) expr = slot->name;
735 #include "state.h"
736#endif
321 737
322 { 738 {
323 dSP; 739 dSP;
740
324 CV *cv; 741 CV *cv;
325 742
326 /* now do the ugly restore mess */ 743 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 744 while (ecb_expect_true (cv = (CV *)POPs))
328 { 745 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 746 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 747 CvDEPTH (cv) = PTR2IV (POPs);
335 } 748 CvPADLIST (cv) = (PADLIST *)POPs;
336
337 ++CvDEPTH(cv);
338 } 749 }
339 750
340 PUTBACK; 751 PUTBACK;
341 } 752 }
342}
343 753
754 slf_frame = c->slf_frame;
755 CORO_THROW = c->except;
756
757 if (ecb_expect_false (enable_times))
758 {
759 if (ecb_expect_false (!times_valid))
760 coro_times_update ();
761
762 coro_times_sub (c);
763 }
764
765 if (ecb_expect_false (c->on_enter))
766 {
767 int i;
768
769 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
770 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
771 }
772
773 SWAP_SVS (c);
774}
775
344static void 776static void
345save_state(Coro__State c, int flags) 777save_perl (pTHX_ Coro__State c)
346{ 778{
779 SWAP_SVS (c);
780
781 if (ecb_expect_false (c->on_leave))
782 {
783 int i;
784
785 for (i = AvFILLp (c->on_leave); i >= 0; --i)
786 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
787 }
788
789 times_valid = 0;
790
791 if (ecb_expect_false (enable_times))
792 {
793 coro_times_update (); times_valid = 1;
794 coro_times_add (c);
795 }
796
797 c->except = CORO_THROW;
798 c->slf_frame = slf_frame;
799
347 { 800 {
348 dSP; 801 dSP;
349 I32 cxix = cxstack_ix; 802 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 803 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 804 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 806 /*
354 * the worst thing you can imagine happens first - we have to save 807 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 808 * (and reinitialize) all cv's in the whole callchain :(
356 */ 809 */
357 810
358 PUSHs (Nullsv); 811 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 812 /* this loop was inspired by pp_caller */
360 for (;;) 813 for (;;)
361 { 814 {
362 while (cxix >= 0) 815 while (ecb_expect_true (cxix >= 0))
363 { 816 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 817 PERL_CONTEXT *cx = &ccstk[cxix--];
365 818
366 if (CxTYPE(cx) == CXt_SUB) 819 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 820 {
368 CV *cv = cx->blk_sub.cv; 821 CV *cv = cx->blk_sub.cv;
822
369 if (CvDEPTH(cv)) 823 if (ecb_expect_true (CvDEPTH (cv)))
370 { 824 {
371 EXTEND (SP, CvDEPTH(cv)*2); 825 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)); 826 PUSHs ((SV *)CvPADLIST (cv));
827 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 828 PUSHs ((SV *)cv);
382 829
830 CvDEPTH (cv) = 0;
383 get_padlist (cv); 831 get_padlist (aTHX_ cv);
384 } 832 }
385 } 833 }
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 } 834 }
395 835
396 if (top_si->si_type == PERLSI_MAIN) 836 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 837 break;
398 838
399 top_si = top_si->si_prev; 839 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 840 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 841 cxix = top_si->si_cxix;
402 } 842 }
403 843
404 PUTBACK; 844 PUTBACK;
405 } 845 }
406 846
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 847 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 848 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 849 {
850 unsigned int i;
410 851
411 c->dowarn = PL_dowarn; 852 for (i = 0; i < SLOT_COUNT; ++i)
412 c->in_eval = PL_in_eval; 853 CXINC;
413 854
414 c->curstackinfo = PL_curstackinfo; 855 cxstack_ix -= SLOT_COUNT; /* undo allocation */
415 c->curstack = PL_curstack; 856 }
857
416 c->mainstack = PL_mainstack; 858 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 859
418 c->op = PL_op; 860 {
419 c->curpad = PL_curpad; 861 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 862
421 c->compcv = PL_compcv; 863#if CORO_JIT
422 c->stack_base = PL_stack_base; 864 save_perl_slots (slot);
423 c->stack_max = PL_stack_max; 865#else
424 c->tmps_stack = PL_tmps_stack; 866 #define VARx(name,expr,type) slot->name = expr;
425 c->tmps_floor = PL_tmps_floor; 867 #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 868#endif
442 c->curpm = PL_curpm; 869 }
443 c->curcop = PL_curcop;
444} 870}
445 871
446/* 872/*
447 * allocate various perl stacks. This is an exact copy 873 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 874 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 875 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 876 * not usually need a lot of stackspace.
451 */ 877 */
878#if CORO_PREFER_PERL_FUNCTIONS
879# define coro_init_stacks(thx) init_stacks ()
880#else
452static void 881static void
453coro_init_stacks () 882coro_init_stacks (pTHX)
454{ 883{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 884 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; 885 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 886 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 887 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 888
460 PL_stack_base = AvARRAY(PL_curstack); 889 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 890 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 891 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 892
464 New(50,PL_tmps_stack,96,SV*); 893 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 894 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 895 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 896 PL_tmps_max = 32;
468 897
469 New(54,PL_markstack,16,I32); 898 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 899 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 900 PL_markstack_max = PL_markstack + 16;
472 901
473#ifdef SET_MARK_OFFSET 902#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 903 SET_MARK_OFFSET;
475#endif 904#endif
476 905
477 New(54,PL_scopestack,16,I32); 906 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 907 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 908 PL_scopestack_max = 8;
909#if HAS_SCOPESTACK_NAME
910 New(54,PL_scopestack_name,8,const char*);
911#endif
480 912
481 New(54,PL_savestack,96,ANY); 913 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 914 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 915 PL_savestack_max = 24;
484 916
485#if !PERL_VERSION_ATLEAST (5,9,0) 917#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 918 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 919 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 920 PL_retstack_max = 4;
489#endif 921#endif
490} 922}
923#endif
491 924
492/* 925/*
493 * destroy the stacks, the callchain etc... 926 * destroy the stacks, the callchain etc...
494 */ 927 */
495static void 928static void
496coro_destroy_stacks() 929coro_destruct_stacks (pTHX)
497{ 930{
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) 931 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 932 PL_curstackinfo = PL_curstackinfo->si_next;
511 933
512 while (PL_curstackinfo) 934 while (PL_curstackinfo)
513 { 935 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 936 PERL_SI *p = PL_curstackinfo->si_prev;
515 937
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 938 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 939 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 940
528 Safefree (PL_curstackinfo->si_cxstack); 941 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 942 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 943 PL_curstackinfo = p;
531 } 944 }
532 945
533 Safefree (PL_tmps_stack); 946 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 947 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 948 Safefree (PL_scopestack);
949#if HAS_SCOPESTACK_NAME
950 Safefree (PL_scopestack_name);
951#endif
536 Safefree (PL_savestack); 952 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 953#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 954 Safefree (PL_retstack);
539#endif 955#endif
540} 956}
541 957
958#define CORO_RSS \
959 rss += sizeof (SYM (curstackinfo)); \
960 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
961 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
962 rss += SYM (tmps_max) * sizeof (SV *); \
963 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
964 rss += SYM (scopestack_max) * sizeof (I32); \
965 rss += SYM (savestack_max) * sizeof (ANY);
966
967static size_t
968coro_rss (pTHX_ struct coro *coro)
969{
970 size_t rss = sizeof (*coro);
971
972 if (coro->mainstack)
973 {
974 if (coro->flags & CF_RUNNING)
975 {
976 #define SYM(sym) PL_ ## sym
977 CORO_RSS;
978 #undef SYM
979 }
980 else
981 {
982 #define SYM(sym) coro->slot->sym
983 CORO_RSS;
984 #undef SYM
985 }
986 }
987
988 return rss;
989}
990
991/** coroutine stack handling ************************************************/
992
993static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
994static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
996
997/* apparently < 5.8.8 */
998#ifndef MgPV_nolen_const
999#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1000 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1001 (const char*)(mg)->mg_ptr)
1002#endif
1003
1004/*
1005 * This overrides the default magic get method of %SIG elements.
1006 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1007 * and instead of trying to save and restore the hash elements (extremely slow),
1008 * we just provide our own readback here.
1009 */
1010static int ecb_cold
1011coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1012{
1013 const char *s = MgPV_nolen_const (mg);
1014
1015 if (*s == '_')
1016 {
1017 SV **svp = 0;
1018
1019 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1020 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1021
1022 if (svp)
1023 {
1024 SV *ssv;
1025
1026 if (!*svp)
1027 ssv = &PL_sv_undef;
1028 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1029 ssv = sv_2mortal (newRV_inc (*svp));
1030 else
1031 ssv = *svp;
1032
1033 sv_setsv (sv, ssv);
1034 return 0;
1035 }
1036 }
1037
1038 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1039}
1040
1041static int ecb_cold
1042coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1043{
1044 const char *s = MgPV_nolen_const (mg);
1045
1046 if (*s == '_')
1047 {
1048 SV **svp = 0;
1049
1050 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1051 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1052
1053 if (svp)
1054 {
1055 SV *old = *svp;
1056 *svp = 0;
1057 SvREFCNT_dec (old);
1058 return 0;
1059 }
1060 }
1061
1062 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1063}
1064
1065static int ecb_cold
1066coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1067{
1068 const char *s = MgPV_nolen_const (mg);
1069
1070 if (*s == '_')
1071 {
1072 SV **svp = 0;
1073
1074 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1075 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1076
1077 if (svp)
1078 {
1079 SV *old = *svp;
1080 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1081 SvREFCNT_dec (old);
1082 return 0;
1083 }
1084 }
1085
1086 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1087}
1088
1089static void
1090prepare_nop (pTHX_ struct coro_transfer_args *ta)
1091{
1092 /* kind of mega-hacky, but works */
1093 ta->next = ta->prev = (struct coro *)ta;
1094}
1095
542static void 1096static int
543setup_coro (struct coro *coro) 1097slf_check_nop (pTHX_ struct CoroSLF *frame)
1098{
1099 return 0;
1100}
1101
1102static int
1103slf_check_repeat (pTHX_ struct CoroSLF *frame)
1104{
1105 return 1;
1106}
1107
1108static UNOP init_perl_op;
1109
1110ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1111init_perl (pTHX_ struct coro *coro)
544{ 1112{
545 /* 1113 /*
546 * emulate part of the perl startup here. 1114 * emulate part of the perl startup here.
547 */ 1115 */
548
549 coro_init_stacks (); 1116 coro_init_stacks (aTHX);
550 1117
1118 PL_runops = RUNOPS_DEFAULT;
1119 PL_curcop = &PL_compiling;
1120 PL_in_eval = EVAL_NULL;
551 PL_curcop = 0; 1121 PL_comppad = 0;
552 PL_in_eval = 0; 1122 PL_comppad_name = 0;
1123 PL_comppad_name_fill = 0;
1124 PL_comppad_name_floor = 0;
553 PL_curpm = 0; 1125 PL_curpm = 0;
1126 PL_curpad = 0;
1127 PL_localizing = 0;
1128 PL_restartop = 0;
1129#if PERL_VERSION_ATLEAST (5,10,0)
1130 PL_parser = 0;
1131#endif
1132 PL_hints = 0;
1133
1134 /* recreate the die/warn hooks */
1135 PL_diehook = SvREFCNT_inc (rv_diehook);
1136 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1137
1138 GvSV (PL_defgv) = newSV (0);
1139 GvAV (PL_defgv) = coro->args; coro->args = 0;
1140 GvSV (PL_errgv) = newSV (0);
1141 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1142 GvHV (PL_hintgv) = 0;
1143 PL_rs = newSVsv (GvSV (irsgv));
1144 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
554 1145
555 { 1146 {
556 dSP; 1147 dSP;
557 LOGOP myop; 1148 UNOP myop;
558 1149
559 /* I have no idea why this is needed, but it is */ 1150 Zero (&myop, 1, UNOP);
1151 myop.op_next = Nullop;
1152 myop.op_type = OP_ENTERSUB;
1153 myop.op_flags = OPf_WANT_VOID;
1154
560 PUSHMARK (SP); 1155 PUSHMARK (SP);
561 1156 PUSHs ((SV *)coro->startcv);
562 SvREFCNT_dec (GvAV (PL_defgv)); 1157 PUTBACK;
563 GvAV (PL_defgv) = coro->args; coro->args = 0;
564
565 Zero (&myop, 1, LOGOP);
566 myop.op_next = Nullop;
567 myop.op_flags = OPf_WANT_VOID;
568
569 PL_op = (OP *)&myop; 1158 PL_op = (OP *)&myop;
570
571 PUSHMARK (SP);
572 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573 PUTBACK;
574 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1159 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN;
576
577 ENTER; /* necessary e.g. for dounwind */
578 } 1160 }
579}
580 1161
1162 /* this newly created coroutine might be run on an existing cctx which most
1163 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1164 */
1165 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1166 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1167 slf_frame.destroy = 0;
1168
1169 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1170 init_perl_op.op_next = PL_op;
1171 init_perl_op.op_type = OP_ENTERSUB;
1172 init_perl_op.op_ppaddr = pp_slf;
1173 /* no flags etc. required, as an init function won't be called */
1174
1175 PL_op = (OP *)&init_perl_op;
1176
1177 /* copy throw, in case it was set before init_perl */
1178 CORO_THROW = coro->except;
1179
1180 SWAP_SVS (coro);
1181
1182 if (ecb_expect_false (enable_times))
1183 {
1184 coro_times_update ();
1185 coro_times_sub (coro);
1186 }
1187}
1188
581static void 1189static void
1190coro_unwind_stacks (pTHX)
1191{
1192 if (!IN_DESTRUCT)
1193 {
1194 /* restore all saved variables and stuff */
1195 LEAVE_SCOPE (0);
1196 assert (PL_tmps_floor == -1);
1197
1198 /* free all temporaries */
1199 FREETMPS;
1200 assert (PL_tmps_ix == -1);
1201
1202 /* unwind all extra stacks */
1203 POPSTACK_TO (PL_mainstack);
1204
1205 /* unwind main stack */
1206 dounwind (-1);
1207 }
1208}
1209
1210static void
1211destroy_perl (pTHX_ struct coro *coro)
1212{
1213 SV *svf [9];
1214
1215 {
1216 SV *old_current = SvRV (coro_current);
1217 struct coro *current = SvSTATE (old_current);
1218
1219 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1220
1221 save_perl (aTHX_ current);
1222
1223 /* this will cause transfer_check to croak on block*/
1224 SvRV_set (coro_current, (SV *)coro->hv);
1225
1226 load_perl (aTHX_ coro);
1227
1228 coro_unwind_stacks (aTHX);
1229
1230 /* restore swapped sv's */
1231 SWAP_SVS (coro);
1232
1233 coro_destruct_stacks (aTHX);
1234
1235 /* now save some sv's to be free'd later */
1236 svf [0] = GvSV (PL_defgv);
1237 svf [1] = (SV *)GvAV (PL_defgv);
1238 svf [2] = GvSV (PL_errgv);
1239 svf [3] = (SV *)PL_defoutgv;
1240 svf [4] = PL_rs;
1241 svf [5] = GvSV (irsgv);
1242 svf [6] = (SV *)GvHV (PL_hintgv);
1243 svf [7] = PL_diehook;
1244 svf [8] = PL_warnhook;
1245 assert (9 == sizeof (svf) / sizeof (*svf));
1246
1247 SvRV_set (coro_current, old_current);
1248
1249 load_perl (aTHX_ current);
1250 }
1251
1252 {
1253 unsigned int i;
1254
1255 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1256 SvREFCNT_dec (svf [i]);
1257
1258 SvREFCNT_dec (coro->saved_deffh);
1259 SvREFCNT_dec (coro->rouse_cb);
1260 SvREFCNT_dec (coro->invoke_cb);
1261 SvREFCNT_dec (coro->invoke_av);
1262 }
1263}
1264
1265ecb_inline void
582free_coro_mortal () 1266free_coro_mortal (pTHX)
583{ 1267{
584 if (coro_mortal) 1268 if (ecb_expect_true (coro_mortal))
585 { 1269 {
586 SvREFCNT_dec (coro_mortal); 1270 SvREFCNT_dec ((SV *)coro_mortal);
587 coro_mortal = 0; 1271 coro_mortal = 0;
588 } 1272 }
589} 1273}
590 1274
591static void NOINLINE
592prepare_cctx (coro_stack *cctx)
593{
594 dSP;
595 LOGOP myop;
596
597 Zero (&myop, 1, LOGOP);
598 myop.op_next = PL_op;
599 myop.op_flags = OPf_WANT_VOID;
600
601 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602
603 PUSHMARK (SP);
604 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
605 PUTBACK;
606 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
607 SPAGAIN;
608}
609
610static void 1275static int
611coro_run (void *arg) 1276runops_trace (pTHX)
612{ 1277{
613 /* coro_run is the alternative epilogue of transfer() */ 1278 COP *oldcop = 0;
614 UNLOCK; 1279 int oldcxix = -2;
615 1280
616 /* 1281 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
617 * this is a _very_ stripped down perl interpreter ;) 1282 {
618 */ 1283 PERL_ASYNC_CHECK ();
1284
1285 if (cctx_current->flags & CC_TRACE_ALL)
1286 {
1287 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1288 {
1289 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1290 SV **bot, **top;
1291 AV *av = newAV (); /* return values */
1292 SV **cb;
1293 dSP;
1294
1295 GV *gv = CvGV (cx->blk_sub.cv);
1296 SV *fullname = sv_2mortal (newSV (0));
1297 if (isGV (gv))
1298 gv_efullname3 (fullname, gv, 0);
1299
1300 bot = PL_stack_base + cx->blk_oldsp + 1;
1301 top = cx->blk_gimme == G_ARRAY ? SP + 1
1302 : cx->blk_gimme == G_SCALAR ? bot + 1
1303 : bot;
1304
1305 av_extend (av, top - bot);
1306 while (bot < top)
1307 av_push (av, SvREFCNT_inc_NN (*bot++));
1308
1309 PL_runops = RUNOPS_DEFAULT;
1310 ENTER;
1311 SAVETMPS;
1312 EXTEND (SP, 3);
1313 PUSHMARK (SP);
1314 PUSHs (&PL_sv_no);
1315 PUSHs (fullname);
1316 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1317 PUTBACK;
1318 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1319 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1320 SPAGAIN;
1321 FREETMPS;
1322 LEAVE;
1323 PL_runops = runops_trace;
1324 }
1325
1326 if (oldcop != PL_curcop)
1327 {
1328 oldcop = PL_curcop;
1329
1330 if (PL_curcop != &PL_compiling)
1331 {
1332 SV **cb;
1333
1334 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1335 {
1336 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1337
1338 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1339 {
1340 dSP;
1341 GV *gv = CvGV (cx->blk_sub.cv);
1342 SV *fullname = sv_2mortal (newSV (0));
1343
1344 if (isGV (gv))
1345 gv_efullname3 (fullname, gv, 0);
1346
1347 PL_runops = RUNOPS_DEFAULT;
1348 ENTER;
1349 SAVETMPS;
1350 EXTEND (SP, 3);
1351 PUSHMARK (SP);
1352 PUSHs (&PL_sv_yes);
1353 PUSHs (fullname);
1354 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1355 PUTBACK;
1356 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1357 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1358 SPAGAIN;
1359 FREETMPS;
1360 LEAVE;
1361 PL_runops = runops_trace;
1362 }
1363
1364 oldcxix = cxstack_ix;
1365 }
1366
1367 if (cctx_current->flags & CC_TRACE_LINE)
1368 {
1369 dSP;
1370
1371 PL_runops = RUNOPS_DEFAULT;
1372 ENTER;
1373 SAVETMPS;
1374 EXTEND (SP, 3);
1375 PL_runops = RUNOPS_DEFAULT;
1376 PUSHMARK (SP);
1377 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1378 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1379 PUTBACK;
1380 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1381 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1382 SPAGAIN;
1383 FREETMPS;
1384 LEAVE;
1385 PL_runops = runops_trace;
1386 }
1387 }
1388 }
1389 }
1390 }
1391
1392 TAINT_NOT;
1393 return 0;
1394}
1395
1396static struct CoroSLF cctx_ssl_frame;
1397
1398static void
1399slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1400{
1401 ta->prev = 0;
1402}
1403
1404static int
1405slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1406{
1407 *frame = cctx_ssl_frame;
1408
1409 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1410}
1411
1412/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1413static void ecb_noinline
1414cctx_prepare (pTHX)
1415{
619 PL_top_env = &PL_start_env; 1416 PL_top_env = &PL_start_env;
1417
1418 if (cctx_current->flags & CC_TRACE)
1419 PL_runops = runops_trace;
1420
1421 /* we already must be executing an SLF op, there is no other valid way
1422 * that can lead to creation of a new cctx */
1423 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1424 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1425
1426 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1427 cctx_ssl_frame = slf_frame;
1428
1429 slf_frame.prepare = slf_prepare_set_stacklevel;
1430 slf_frame.check = slf_check_set_stacklevel;
1431}
1432
1433/* the tail of transfer: execute stuff we can only do after a transfer */
1434ecb_inline void
1435transfer_tail (pTHX)
1436{
1437 free_coro_mortal (aTHX);
1438}
1439
1440/* try to exit the same way perl's main function would do */
1441/* we do not bother resetting the environment or other things *7
1442/* that are not, uhm, essential */
1443/* this obviously also doesn't work when perl is embedded */
1444static void ecb_noinline ecb_cold
1445perlish_exit (pTHX)
1446{
1447 int exitstatus = perl_destruct (PL_curinterp);
1448 perl_free (PL_curinterp);
1449 exit (exitstatus);
1450}
1451
1452/*
1453 * this is a _very_ stripped down perl interpreter ;)
1454 */
1455static void
1456cctx_run (void *arg)
1457{
1458#ifdef USE_ITHREADS
1459# if CORO_PTHREAD
1460 PERL_SET_CONTEXT (coro_thx);
1461# endif
1462#endif
1463 {
1464 dTHX;
1465
1466 /* normally we would need to skip the entersub here */
1467 /* not doing so will re-execute it, which is exactly what we want */
1468 /* PL_nop = PL_nop->op_next */
1469
620 /* inject call to cctx_init */ 1470 /* inject a fake subroutine call to cctx_init */
621 prepare_cctx ((coro_stack *)arg); 1471 cctx_prepare (aTHX);
622 1472
1473 /* cctx_run is the alternative tail of transfer() */
1474 transfer_tail (aTHX);
1475
623 /* somebody will hit me for both perl_run and PL_restartop */ 1476 /* somebody or something will hit me for both perl_run and PL_restartop */
1477 PL_restartop = PL_op;
624 perl_run (PL_curinterp); 1478 perl_run (PL_curinterp);
1479 /*
1480 * Unfortunately, there is no way to get at the return values of the
1481 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1482 * runtime errors here, as this is just a random interpreter, not a thread.
1483 */
625 1484
626 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1485 /*
627 abort (); 1486 * If perl-run returns we assume exit() was being called or the coro
1487 * fell off the end, which seems to be the only valid (non-bug)
1488 * reason for perl_run to return. We try to mimic whatever perl is normally
1489 * doing in that case. YMMV.
1490 */
1491 perlish_exit (aTHX);
1492 }
628} 1493}
629 1494
630static coro_stack * 1495static coro_cctx *
631stack_new () 1496cctx_new (void)
632{ 1497{
633 coro_stack *stack; 1498 coro_cctx *cctx;
634 1499
1500 ++cctx_count;
635 New (0, stack, 1, coro_stack); 1501 New (0, cctx, 1, coro_cctx);
636 1502
637#if HAVE_MMAP 1503 cctx->gen = cctx_gen;
1504 cctx->flags = 0;
1505 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
638 1506
639 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1507 return cctx;
640 /* mmap suppsedly does allocate-on-write for us */ 1508}
641 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642 1509
643 if (stack->sptr == (void *)-1) 1510/* create a new cctx only suitable as source */
1511static coro_cctx *
1512cctx_new_empty (void)
1513{
1514 coro_cctx *cctx = cctx_new ();
1515
1516 cctx->stack.sptr = 0;
1517 coro_create (&cctx->cctx, 0, 0, 0, 0);
1518
1519 return cctx;
1520}
1521
1522/* create a new cctx suitable as destination/running a perl interpreter */
1523static coro_cctx *
1524cctx_new_run (void)
1525{
1526 coro_cctx *cctx = cctx_new ();
1527
1528 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
644 { 1529 {
645 perror ("FATAL: unable to mmap stack for coroutine"); 1530 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
646 _exit (EXIT_FAILURE); 1531 _exit (EXIT_FAILURE);
647 } 1532 }
648 1533
649# if STACKGUARD 1534 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
650 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
651# endif
652 1535
653#else
654
655 stack->ssize = STACKSIZE * (long)sizeof (long);
656 New (0, stack->sptr, STACKSIZE, long);
657
658 if (!stack->sptr)
659 {
660 perror (stderr, "FATAL: unable to malloc stack for coroutine");
661 _exit (EXIT_FAILURE);
662 }
663
664#endif
665
666 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
667
668 return stack; 1536 return cctx;
669} 1537}
670 1538
671static void 1539static void
672stack_free (coro_stack *stack) 1540cctx_destroy (coro_cctx *cctx)
673{ 1541{
674 if (!stack) 1542 if (!cctx)
675 return; 1543 return;
676 1544
677#if HAVE_MMAP 1545 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
678 munmap (stack->sptr, stack->ssize);
679#else
680 Safefree (stack->sptr);
681#endif
682 1546
1547 --cctx_count;
1548 coro_destroy (&cctx->cctx);
1549
1550 coro_stack_free (&cctx->stack);
1551
683 Safefree (stack); 1552 Safefree (cctx);
684} 1553}
685 1554
686static coro_stack *stack_first; 1555/* wether this cctx should be destructed */
687static int cctx_count, cctx_idle; 1556#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
688 1557
689static coro_stack * 1558static coro_cctx *
690stack_get () 1559cctx_get (pTHX)
691{ 1560{
692 coro_stack *stack; 1561 while (ecb_expect_true (cctx_first))
693
694 if (stack_first)
695 { 1562 {
1563 coro_cctx *cctx = cctx_first;
1564 cctx_first = cctx->next;
696 --cctx_idle; 1565 --cctx_idle;
697 stack = stack_first; 1566
698 stack_first = stack->next; 1567 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
699 } 1568 return cctx;
700 else 1569
701 { 1570 cctx_destroy (cctx);
702 ++cctx_count;
703 stack = stack_new ();
704 PL_op = PL_op->op_next;
705 } 1571 }
706 1572
707 return stack; 1573 return cctx_new_run ();
708} 1574}
709 1575
710static void 1576static void
711stack_put (coro_stack *stack) 1577cctx_put (coro_cctx *cctx)
712{ 1578{
1579 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1580
1581 /* free another cctx if overlimit */
1582 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1583 {
1584 coro_cctx *first = cctx_first;
1585 cctx_first = first->next;
1586 --cctx_idle;
1587
1588 cctx_destroy (first);
1589 }
1590
713 ++cctx_idle; 1591 ++cctx_idle;
714 stack->next = stack_first; 1592 cctx->next = cctx_first;
715 stack_first = stack; 1593 cctx_first = cctx;
716} 1594}
717 1595
718/* never call directly, always through the coro_state_transfer global variable */ 1596/** coroutine switching *****************************************************/
719static void NOINLINE 1597
1598static void
1599transfer_check (pTHX_ struct coro *prev, struct coro *next)
1600{
1601 /* TODO: throwing up here is considered harmful */
1602
1603 if (ecb_expect_true (prev != next))
1604 {
1605 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1606 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1607
1608 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1609 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1610
1611#if !PERL_VERSION_ATLEAST (5,10,0)
1612 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1613 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1614#endif
1615 }
1616}
1617
1618/* always use the TRANSFER macro */
1619static void ecb_noinline /* noinline so we have a fixed stackframe */
720transfer (struct coro *prev, struct coro *next, int flags) 1620transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
721{ 1621{
722 dSTACKLEVEL; 1622 dSTACKLEVEL;
723 1623
724 /* sometimes transfer is only called to set idle_sp */ 1624 /* sometimes transfer is only called to set idle_sp */
725 if (flags == TRANSFER_SET_STACKLEVEL) 1625 if (ecb_expect_false (!prev))
726 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1626 {
727 else if (prev != next) 1627 cctx_current->idle_sp = STACKLEVEL;
1628 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
728 { 1629 }
729 coro_stack *prev__stack; 1630 else if (ecb_expect_true (prev != next))
1631 {
1632 coro_cctx *cctx_prev;
730 1633
731 LOCK; 1634 if (ecb_expect_false (prev->flags & CF_NEW))
732
733 if (next->mainstack)
734 { 1635 {
735 /* coroutine already started */ 1636 /* create a new empty/source context */
736 SAVE (prev, flags); 1637 prev->flags &= ~CF_NEW;
737 LOAD (next); 1638 prev->flags |= CF_RUNNING;
1639 }
1640
1641 prev->flags &= ~CF_RUNNING;
1642 next->flags |= CF_RUNNING;
1643
1644 /* first get rid of the old state */
1645 save_perl (aTHX_ prev);
1646
1647 if (ecb_expect_false (next->flags & CF_NEW))
1648 {
1649 /* need to start coroutine */
1650 next->flags &= ~CF_NEW;
1651 /* setup coroutine call */
1652 init_perl (aTHX_ next);
738 } 1653 }
739 else 1654 else
1655 load_perl (aTHX_ next);
1656
1657 /* possibly untie and reuse the cctx */
1658 if (ecb_expect_true (
1659 cctx_current->idle_sp == STACKLEVEL
1660 && !(cctx_current->flags & CC_TRACE)
1661 && !force_cctx
1662 ))
740 { 1663 {
741 /* need to start coroutine */ 1664 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
742 /* first get rid of the old state */ 1665 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
743 SAVE (prev, -1); 1666
744 /* setup coroutine call */ 1667 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
745 setup_coro (next); 1668 /* without this the next cctx_get might destroy the running cctx while still in use */
746 /* need a stack */ 1669 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
747 next->stack = 0; 1670 if (ecb_expect_true (!next->cctx))
1671 next->cctx = cctx_get (aTHX);
1672
1673 cctx_put (cctx_current);
748 } 1674 }
1675 else
1676 prev->cctx = cctx_current;
749 1677
750 if (!prev->stack) 1678 ++next->usecount;
751 /* create a new empty context */
752 Newz (0, prev->stack, 1, coro_stack);
753 1679
754 prev__stack = prev->stack; 1680 cctx_prev = cctx_current;
1681 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
755 1682
756 /* possibly "free" the stack */ 1683 next->cctx = 0;
757 if (prev__stack->idle_sp == STACKLEVEL) 1684
1685 if (ecb_expect_false (cctx_prev != cctx_current))
758 { 1686 {
759 stack_put (prev__stack); 1687 cctx_prev->top_env = PL_top_env;
760 prev->stack = 0; 1688 PL_top_env = cctx_current->top_env;
1689 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
761 } 1690 }
762 1691
763 if (!next->stack) 1692 transfer_tail (aTHX);
764 next->stack = stack_get ();
765
766 if (prev__stack != next->stack)
767 {
768 prev__stack->top_env = PL_top_env;
769 PL_top_env = next->stack->top_env;
770 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
771 }
772
773 free_coro_mortal ();
774
775 UNLOCK;
776 } 1693 }
777} 1694}
778 1695
779struct transfer_args 1696#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
780{
781 struct coro *prev, *next;
782 int flags;
783};
784
785#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1697#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
786 1698
1699/** high level stuff ********************************************************/
1700
1701/* this function is actually Coro, not Coro::State, but we call it from here */
1702/* because it is convenient - but it hasn't been declared yet for that reason */
787static void 1703static void
1704coro_call_on_destroy (pTHX_ struct coro *coro);
1705
1706static void
788coro_state_destroy (struct coro *coro) 1707coro_state_destroy (pTHX_ struct coro *coro)
789{ 1708{
790 if (coro->refcnt--) 1709 if (coro->flags & CF_ZOMBIE)
791 return; 1710 return;
792 1711
793 if (coro->mainstack && coro->mainstack != main_mainstack) 1712 slf_destroy (aTHX_ coro);
794 {
795 struct coro temp;
796 1713
797 SAVE ((&temp), TRANSFER_SAVE_ALL); 1714 coro->flags |= CF_ZOMBIE;
798 LOAD (coro);
799 1715
800 coro_destroy_stacks (); 1716 if (coro->flags & CF_READY)
801
802 LOAD ((&temp)); /* this will get rid of defsv etc.. */
803
804 coro->mainstack = 0;
805 } 1717 {
1718 /* reduce nready, as destroying a ready coro effectively unreadies it */
1719 /* alternative: look through all ready queues and remove the coro */
1720 --coro_nready;
1721 }
1722 else
1723 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
806 1724
807 stack_free (coro->stack); 1725 if (coro->next) coro->next->prev = coro->prev;
1726 if (coro->prev) coro->prev->next = coro->next;
1727 if (coro == coro_first) coro_first = coro->next;
1728
1729 if (coro->mainstack
1730 && coro->mainstack != main_mainstack
1731 && coro->slot
1732 && !PL_dirty)
1733 destroy_perl (aTHX_ coro);
1734
1735 cctx_destroy (coro->cctx);
1736 SvREFCNT_dec (coro->startcv);
808 SvREFCNT_dec (coro->args); 1737 SvREFCNT_dec (coro->args);
809 Safefree (coro); 1738 SvREFCNT_dec (coro->swap_sv);
1739 SvREFCNT_dec (CORO_THROW);
1740
1741 coro_call_on_destroy (aTHX_ coro);
1742
1743 /* more destruction mayhem in coro_state_free */
810} 1744}
811 1745
812static int 1746static int
813coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1747coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814{ 1748{
815 struct coro *coro = (struct coro *)mg->mg_ptr; 1749 struct coro *coro = (struct coro *)mg->mg_ptr;
816 mg->mg_ptr = 0; 1750 mg->mg_ptr = 0;
817 1751
818 coro_state_destroy (coro); 1752 coro_state_destroy (aTHX_ coro);
1753 SvREFCNT_dec (coro->on_destroy);
1754 SvREFCNT_dec (coro->status);
1755
1756 Safefree (coro);
819 1757
820 return 0; 1758 return 0;
821} 1759}
822 1760
823static int 1761static int ecb_cold
824coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1762coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
825{ 1763{
826 struct coro *coro = (struct coro *)mg->mg_ptr; 1764 /* called when perl clones the current process the slow way (windows process emulation) */
827 1765 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
828 ++coro->refcnt; 1766 mg->mg_ptr = 0;
1767 mg->mg_virtual = 0;
829 1768
830 return 0; 1769 return 0;
831} 1770}
832 1771
833static MGVTBL coro_state_vtbl = { 1772static MGVTBL coro_state_vtbl = {
834 0, 0, 0, 0, 1773 0, 0, 0, 0,
835 coro_state_clear, 1774 coro_state_free,
836 0, 1775 0,
837#ifdef MGf_DUP 1776#ifdef MGf_DUP
838 coro_state_dup, 1777 coro_state_dup,
839#else 1778#else
840# define MGf_DUP 0 1779# define MGf_DUP 0
841#endif 1780#endif
842}; 1781};
843 1782
844static struct coro *
845SvSTATE (SV *coro)
846{
847 HV *stash;
848 MAGIC *mg;
849
850 if (SvROK (coro))
851 coro = SvRV (coro);
852
853 stash = SvSTASH (coro);
854 if (stash != coro_stash && stash != coro_state_stash)
855 {
856 /* very slow, but rare, check */
857 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858 croak ("Coro::State object required");
859 }
860
861 mg = SvMAGIC (coro);
862 assert (mg->mg_type == PERL_MAGIC_ext);
863 return (struct coro *)mg->mg_ptr;
864}
865
866static void 1783static void
867prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1784prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
868{ 1785{
869 ta->prev = SvSTATE (prev); 1786 ta->prev = SvSTATE (prev_sv);
870 ta->next = SvSTATE (next); 1787 ta->next = SvSTATE (next_sv);
871 ta->flags = flags; 1788 TRANSFER_CHECK (*ta);
872} 1789}
873 1790
874static void 1791static void
875api_transfer (SV *prev, SV *next, int flags) 1792api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1793{
1794 struct coro_transfer_args ta;
1795
1796 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1797 TRANSFER (ta, 1);
1798}
1799
1800/** Coro ********************************************************************/
1801
1802ecb_inline void
1803coro_enq (pTHX_ struct coro *coro)
1804{
1805 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1806
1807 SvREFCNT_inc_NN (coro->hv);
1808
1809 coro->next_ready = 0;
1810 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1811 ready [1] = coro;
1812}
1813
1814ecb_inline struct coro *
1815coro_deq (pTHX)
1816{
1817 int prio;
1818
1819 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1820 {
1821 struct coro **ready = coro_ready [prio];
1822
1823 if (ready [0])
1824 {
1825 struct coro *coro = ready [0];
1826 ready [0] = coro->next_ready;
1827 return coro;
1828 }
1829 }
1830
1831 return 0;
1832}
1833
1834static void
1835invoke_sv_ready_hook_helper (void)
876{ 1836{
877 dTHX; 1837 dTHX;
1838 dSP;
1839
1840 ENTER;
1841 SAVETMPS;
1842
1843 PUSHMARK (SP);
1844 PUTBACK;
1845 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1846
1847 FREETMPS;
1848 LEAVE;
1849}
1850
1851static int
1852api_ready (pTHX_ SV *coro_sv)
1853{
1854 struct coro *coro = SvSTATE (coro_sv);
1855
1856 if (coro->flags & CF_READY)
1857 return 0;
1858
1859 coro->flags |= CF_READY;
1860
1861 coro_enq (aTHX_ coro);
1862
1863 if (!coro_nready++)
1864 if (coroapi.readyhook)
1865 coroapi.readyhook ();
1866
1867 return 1;
1868}
1869
1870static int
1871api_is_ready (pTHX_ SV *coro_sv)
1872{
1873 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1874}
1875
1876/* expects to own a reference to next->hv */
1877ecb_inline void
1878prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1879{
1880 SV *prev_sv = SvRV (coro_current);
1881
1882 ta->prev = SvSTATE_hv (prev_sv);
1883 ta->next = next;
1884
1885 TRANSFER_CHECK (*ta);
1886
1887 SvRV_set (coro_current, (SV *)next->hv);
1888
1889 free_coro_mortal (aTHX);
1890 coro_mortal = prev_sv;
1891}
1892
1893static void
1894prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1895{
1896 for (;;)
1897 {
1898 struct coro *next = coro_deq (aTHX);
1899
1900 if (ecb_expect_true (next))
1901 {
1902 /* cannot transfer to destroyed coros, skip and look for next */
1903 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1904 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1905 else
1906 {
1907 next->flags &= ~CF_READY;
1908 --coro_nready;
1909
1910 prepare_schedule_to (aTHX_ ta, next);
1911 break;
1912 }
1913 }
1914 else
1915 {
1916 /* nothing to schedule: call the idle handler */
1917 if (SvROK (sv_idle)
1918 && SvOBJECT (SvRV (sv_idle)))
1919 {
1920 if (SvRV (sv_idle) == SvRV (coro_current))
1921 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1922
1923 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1924 api_ready (aTHX_ SvRV (sv_idle));
1925 --coro_nready;
1926 }
1927 else
1928 {
1929 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1930 dSP;
1931
1932 ENTER;
1933 SAVETMPS;
1934
1935 PUSHMARK (SP);
1936 PUTBACK;
1937 call_sv (sv_idle, G_VOID | G_DISCARD);
1938
1939 FREETMPS;
1940 LEAVE;
1941 }
1942 }
1943 }
1944}
1945
1946ecb_inline void
1947prepare_cede (pTHX_ struct coro_transfer_args *ta)
1948{
1949 api_ready (aTHX_ coro_current);
1950 prepare_schedule (aTHX_ ta);
1951}
1952
1953ecb_inline void
1954prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1955{
1956 SV *prev = SvRV (coro_current);
1957
1958 if (coro_nready)
1959 {
1960 prepare_schedule (aTHX_ ta);
1961 api_ready (aTHX_ prev);
1962 }
1963 else
1964 prepare_nop (aTHX_ ta);
1965}
1966
1967static void
1968api_schedule (pTHX)
1969{
878 struct transfer_args ta; 1970 struct coro_transfer_args ta;
879 1971
880 prepare_transfer (&ta, prev, next, flags); 1972 prepare_schedule (aTHX_ &ta);
881 TRANSFER (ta); 1973 TRANSFER (ta, 1);
882} 1974}
883 1975
884/** Coro ********************************************************************/ 1976static void
1977api_schedule_to (pTHX_ SV *coro_sv)
1978{
1979 struct coro_transfer_args ta;
1980 struct coro *next = SvSTATE (coro_sv);
885 1981
886#define PRIO_MAX 3 1982 SvREFCNT_inc_NN (coro_sv);
887#define PRIO_HIGH 1 1983 prepare_schedule_to (aTHX_ &ta, next);
888#define PRIO_NORMAL 0 1984}
889#define PRIO_LOW -1
890#define PRIO_IDLE -3
891#define PRIO_MIN -4
892 1985
893/* for Coro.pm */
894static GV *coro_current, *coro_idle;
895static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896static int coro_nready;
897
898static void 1986static int
899coro_enq (SV *sv) 1987api_cede (pTHX)
900{ 1988{
901 int prio; 1989 struct coro_transfer_args ta;
902 1990
903 if (SvTYPE (sv) != SVt_PVHV) 1991 prepare_cede (aTHX_ &ta);
904 croak ("Coro::ready tried to enqueue something that is not a coroutine");
905 1992
906 prio = SvSTATE (sv)->prio; 1993 if (ecb_expect_true (ta.prev != ta.next))
1994 {
1995 TRANSFER (ta, 1);
1996 return 1;
1997 }
1998 else
1999 return 0;
2000}
907 2001
908 av_push (coro_ready [prio - PRIO_MIN], sv); 2002static int
2003api_cede_notself (pTHX)
2004{
909 coro_nready++; 2005 if (coro_nready)
910} 2006 {
2007 struct coro_transfer_args ta;
911 2008
912static SV * 2009 prepare_cede_notself (aTHX_ &ta);
913coro_deq (int min_prio) 2010 TRANSFER (ta, 1);
914{ 2011 return 1;
915 int prio = PRIO_MAX - PRIO_MIN; 2012 }
2013 else
2014 return 0;
2015}
916 2016
917 min_prio -= PRIO_MIN; 2017static void
918 if (min_prio < 0) 2018api_trace (pTHX_ SV *coro_sv, int flags)
919 min_prio = 0; 2019{
2020 struct coro *coro = SvSTATE (coro_sv);
920 2021
921 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2022 if (coro->flags & CF_RUNNING)
922 if (AvFILLp (coro_ready [prio]) >= 0) 2023 croak ("cannot enable tracing on a running coroutine, caught");
2024
2025 if (flags & CC_TRACE)
2026 {
2027 if (!coro->cctx)
2028 coro->cctx = cctx_new_run ();
2029 else if (!(coro->cctx->flags & CC_TRACE))
2030 croak ("cannot enable tracing on coroutine with custom stack, caught");
2031
2032 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2033 }
2034 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2035 {
2036 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2037
2038 if (coro->flags & CF_RUNNING)
2039 PL_runops = RUNOPS_DEFAULT;
2040 else
2041 coro->slot->runops = RUNOPS_DEFAULT;
2042 }
2043}
2044
2045static void
2046coro_push_av (pTHX_ AV *av, I32 gimme_v)
2047{
2048 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2049 {
2050 dSP;
2051
2052 if (gimme_v == G_SCALAR)
2053 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2054 else
923 { 2055 {
924 coro_nready--; 2056 int i;
925 return av_shift (coro_ready [prio]); 2057 EXTEND (SP, AvFILLp (av) + 1);
2058
2059 for (i = 0; i <= AvFILLp (av); ++i)
2060 PUSHs (AvARRAY (av)[i]);
926 } 2061 }
2062
2063 PUTBACK;
2064 }
2065}
2066
2067static void
2068coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2069{
2070 if (!coro->on_destroy)
2071 coro->on_destroy = newAV ();
2072
2073 av_push (coro->on_destroy, cb);
2074}
2075
2076static void
2077slf_destroy_join (pTHX_ struct CoroSLF *frame)
2078{
2079 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2080}
2081
2082static int
2083slf_check_join (pTHX_ struct CoroSLF *frame)
2084{
2085 struct coro *coro = (struct coro *)frame->data;
2086
2087 if (!coro->status)
2088 return 1;
2089
2090 frame->destroy = 0;
2091
2092 coro_push_av (aTHX_ coro->status, GIMME_V);
2093
2094 SvREFCNT_dec ((SV *)coro->hv);
927 2095
928 return 0; 2096 return 0;
929} 2097}
930 2098
931static void 2099static void
932api_ready (SV *coro) 2100slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
933{ 2101{
934 dTHX; 2102 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
935 2103
936 if (SvROK (coro)) 2104 if (items > 1)
937 coro = SvRV (coro); 2105 croak ("join called with too many arguments");
938 2106
939 LOCK; 2107 if (coro->status)
940 coro_enq (SvREFCNT_inc (coro)); 2108 frame->prepare = prepare_nop;
941 UNLOCK; 2109 else
942} 2110 {
943 2111 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
944static void 2112 frame->prepare = prepare_schedule;
945prepare_schedule (struct transfer_args *ta)
946{
947 SV *current, *prev, *next;
948
949 current = GvSV (coro_current);
950
951 for (;;)
952 { 2113 }
953 LOCK;
954 next = coro_deq (PRIO_MIN);
955 UNLOCK;
956 2114
957 if (next) 2115 frame->check = slf_check_join;
958 break; 2116 frame->destroy = slf_destroy_join;
2117 frame->data = (void *)coro;
2118 SvREFCNT_inc (coro->hv);
2119}
2120
2121static void
2122coro_call_on_destroy (pTHX_ struct coro *coro)
2123{
2124 AV *od = coro->on_destroy;
2125
2126 if (!od)
2127 return;
2128
2129 coro->on_destroy = 0;
2130 sv_2mortal ((SV *)od);
2131
2132 while (AvFILLp (od) >= 0)
2133 {
2134 SV *cb = sv_2mortal (av_pop (od));
2135
2136 /* coro hv's (and only hv's at the moment) are supported as well */
2137 if (SvSTATEhv_p (aTHX_ cb))
2138 api_ready (aTHX_ cb);
2139 else
2140 {
2141 dSP; /* don't disturb outer sp */
2142 PUSHMARK (SP);
2143
2144 if (coro->status)
2145 {
2146 PUTBACK;
2147 coro_push_av (aTHX_ coro->status, G_ARRAY);
2148 SPAGAIN;
2149 }
2150
2151 PUTBACK;
2152 call_sv (cb, G_VOID | G_DISCARD);
2153 }
2154 }
2155}
2156
2157static void
2158coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2159{
2160 AV *av;
2161
2162 if (coro->status)
2163 {
2164 av = coro->status;
2165 av_clear (av);
2166 }
2167 else
2168 av = coro->status = newAV ();
2169
2170 /* items are actually not so common, so optimise for this case */
2171 if (items)
2172 {
2173 int i;
2174
2175 av_extend (av, items - 1);
2176
2177 for (i = 0; i < items; ++i)
2178 av_push (av, SvREFCNT_inc_NN (arg [i]));
2179 }
2180}
2181
2182static void
2183slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2184{
2185 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2186 api_ready (aTHX_ sv_manager);
2187
2188 frame->prepare = prepare_schedule;
2189 frame->check = slf_check_repeat;
2190
2191 /* as a minor optimisation, we could unwind all stacks here */
2192 /* but that puts extra pressure on pp_slf, and is not worth much */
2193 /*coro_unwind_stacks (aTHX);*/
2194}
2195
2196static void
2197slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 HV *coro_hv = (HV *)SvRV (coro_current);
2200
2201 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2202 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2203}
2204
2205static void
2206slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
2208 HV *coro_hv;
2209 struct coro *coro;
2210
2211 if (items <= 0)
2212 croak ("Coro::cancel called without coro object,");
2213
2214 coro = SvSTATE (arg [0]);
2215 coro_hv = coro->hv;
2216
2217 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2218
2219 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2220 {
2221 /* coro currently busy cancelling something, so just notify it */
2222 coro->slf_frame.data = (void *)coro;
2223
2224 frame->prepare = prepare_nop;
2225 frame->check = slf_check_nop;
2226 }
2227 else if (coro_hv == (HV *)SvRV (coro_current))
2228 {
2229 /* cancelling the current coro is allowed, and equals terminate */
2230 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2231 }
2232 else
2233 {
2234 struct coro *self = SvSTATE_current;
2235
2236 /* otherwise we cancel directly, purely for speed reasons
2237 * unfortunately, this requires some magic trickery, as
2238 * somebody else could cancel us, so we have to fight the cancellation.
2239 * this is ugly, and hopefully fully worth the extra speed.
2240 * besides, I can't get the slow-but-safe version working...
2241 */
2242 slf_frame.data = 0;
2243 self->flags |= CF_NOCANCEL;
2244 coro_state_destroy (aTHX_ coro);
2245 self->flags &= ~CF_NOCANCEL;
2246
2247 if (slf_frame.data)
2248 {
2249 /* while we were busy we have been cancelled, so terminate */
2250 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2251 }
2252 else
2253 {
2254 frame->prepare = prepare_nop;
2255 frame->check = slf_check_nop;
2256 }
2257 }
2258}
2259
2260static int
2261slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2262{
2263 frame->prepare = 0;
2264 coro_unwind_stacks (aTHX);
2265
2266 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2267
2268 return 1;
2269}
2270
2271static int
2272safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2273{
2274 if (coro->cctx)
2275 croak ("coro inside C callback, unable to cancel at this time, caught");
2276
2277 if (coro->flags & CF_NEW)
2278 {
2279 coro_set_status (aTHX_ coro, arg, items);
2280 coro_state_destroy (aTHX_ coro);
2281 }
2282 else
2283 {
2284 if (!coro->slf_frame.prepare)
2285 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2286
2287 slf_destroy (aTHX_ coro);
2288
2289 coro_set_status (aTHX_ coro, arg, items);
2290 coro->slf_frame.prepare = prepare_nop;
2291 coro->slf_frame.check = slf_check_safe_cancel;
2292
2293 api_ready (aTHX_ (SV *)coro->hv);
2294 }
2295
2296 return 1;
2297}
2298
2299/*****************************************************************************/
2300/* async pool handler */
2301
2302static int
2303slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2304{
2305 HV *hv = (HV *)SvRV (coro_current);
2306 struct coro *coro = (struct coro *)frame->data;
2307
2308 if (!coro->invoke_cb)
2309 return 1; /* loop till we have invoke */
2310 else
2311 {
2312 hv_store (hv, "desc", sizeof ("desc") - 1,
2313 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2314
2315 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
959 2316
960 { 2317 {
961 dSP; 2318 dSP;
962 2319 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
963 ENTER;
964 SAVETMPS;
965
966 PUSHMARK (SP);
967 PUTBACK; 2320 PUTBACK;
968 call_sv (GvSV (coro_idle), G_DISCARD);
969
970 FREETMPS;
971 LEAVE;
972 } 2321 }
2322
2323 SvREFCNT_dec (GvAV (PL_defgv));
2324 GvAV (PL_defgv) = coro->invoke_av;
2325 coro->invoke_av = 0;
2326
2327 return 0;
2328 }
2329}
2330
2331static void
2332slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2333{
2334 HV *hv = (HV *)SvRV (coro_current);
2335 struct coro *coro = SvSTATE_hv ((SV *)hv);
2336
2337 if (ecb_expect_true (coro->saved_deffh))
973 } 2338 {
2339 /* subsequent iteration */
2340 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2341 coro->saved_deffh = 0;
974 2342
975 prev = SvRV (current); 2343 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
976 SvRV (current) = next; 2344 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2345 {
2346 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2347 return;
2348 }
2349 else
2350 {
2351 av_clear (GvAV (PL_defgv));
2352 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
977 2353
978 /* free this only after the transfer */ 2354 coro->prio = 0;
979 LOCK;
980 free_coro_mortal ();
981 UNLOCK;
982 coro_mortal = prev;
983 2355
984 ta->prev = SvSTATE (prev); 2356 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
985 ta->next = SvSTATE (next); 2357 api_trace (aTHX_ coro_current, 0);
986 ta->flags = TRANSFER_SAVE_ALL;
987}
988 2358
2359 frame->prepare = prepare_schedule;
2360 av_push (av_async_pool, SvREFCNT_inc (hv));
2361 }
2362 }
2363 else
2364 {
2365 /* first iteration, simply fall through */
2366 frame->prepare = prepare_nop;
2367 }
2368
2369 frame->check = slf_check_pool_handler;
2370 frame->data = (void *)coro;
2371}
2372
2373/*****************************************************************************/
2374/* rouse callback */
2375
2376#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2377
2378static void
2379coro_rouse_callback (pTHX_ CV *cv)
2380{
2381 dXSARGS;
2382 SV *data = (SV *)S_GENSUB_ARG;
2383
2384 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2385 {
2386 /* first call, set args */
2387 SV *coro = SvRV (data);
2388 AV *av = newAV ();
2389
2390 SvRV_set (data, (SV *)av);
2391
2392 /* better take a full copy of the arguments */
2393 while (items--)
2394 av_store (av, items, newSVsv (ST (items)));
2395
2396 api_ready (aTHX_ coro);
2397 SvREFCNT_dec (coro);
2398 }
2399
2400 XSRETURN_EMPTY;
2401}
2402
989static void 2403static int
2404slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2405{
2406 SV *data = (SV *)frame->data;
2407
2408 if (CORO_THROW)
2409 return 0;
2410
2411 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2412 return 1;
2413
2414 /* now push all results on the stack */
2415 {
2416 dSP;
2417 AV *av = (AV *)SvRV (data);
2418 int i;
2419
2420 EXTEND (SP, AvFILLp (av) + 1);
2421 for (i = 0; i <= AvFILLp (av); ++i)
2422 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2423
2424 /* we have stolen the elements, so set length to zero and free */
2425 AvFILLp (av) = -1;
2426 av_undef (av);
2427
2428 PUTBACK;
2429 }
2430
2431 return 0;
2432}
2433
2434static void
2435slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2436{
2437 SV *cb;
2438
2439 if (items)
2440 cb = arg [0];
2441 else
2442 {
2443 struct coro *coro = SvSTATE_current;
2444
2445 if (!coro->rouse_cb)
2446 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2447
2448 cb = sv_2mortal (coro->rouse_cb);
2449 coro->rouse_cb = 0;
2450 }
2451
2452 if (!SvROK (cb)
2453 || SvTYPE (SvRV (cb)) != SVt_PVCV
2454 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2455 croak ("Coro::rouse_wait called with illegal callback argument,");
2456
2457 {
2458 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2459 SV *data = (SV *)S_GENSUB_ARG;
2460
2461 frame->data = (void *)data;
2462 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2463 frame->check = slf_check_rouse_wait;
2464 }
2465}
2466
2467static SV *
2468coro_new_rouse_cb (pTHX)
2469{
2470 HV *hv = (HV *)SvRV (coro_current);
2471 struct coro *coro = SvSTATE_hv (hv);
2472 SV *data = newRV_inc ((SV *)hv);
2473 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2474
2475 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2476 SvREFCNT_dec (data); /* magicext increases the refcount */
2477
2478 SvREFCNT_dec (coro->rouse_cb);
2479 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2480
2481 return cb;
2482}
2483
2484/*****************************************************************************/
2485/* schedule-like-function opcode (SLF) */
2486
2487static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2488static const CV *slf_cv;
2489static SV **slf_argv;
2490static int slf_argc, slf_arga; /* count, allocated */
2491static I32 slf_ax; /* top of stack, for restore */
2492
2493/* this restores the stack in the case we patched the entersub, to */
2494/* recreate the stack frame as perl will on following calls */
2495/* since entersub cleared the stack */
2496static OP *
2497pp_restore (pTHX)
2498{
2499 int i;
2500 SV **SP = PL_stack_base + slf_ax;
2501
2502 PUSHMARK (SP);
2503
2504 EXTEND (SP, slf_argc + 1);
2505
2506 for (i = 0; i < slf_argc; ++i)
2507 PUSHs (sv_2mortal (slf_argv [i]));
2508
2509 PUSHs ((SV *)CvGV (slf_cv));
2510
2511 RETURNOP (slf_restore.op_first);
2512}
2513
2514static void
2515slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2516{
2517 SV **arg = (SV **)slf_frame.data;
2518
2519 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2520}
2521
2522static void
2523slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2524{
2525 if (items != 2)
2526 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2527
2528 frame->prepare = slf_prepare_transfer;
2529 frame->check = slf_check_nop;
2530 frame->data = (void *)arg; /* let's hope it will stay valid */
2531}
2532
2533static void
2534slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2535{
2536 frame->prepare = prepare_schedule;
2537 frame->check = slf_check_nop;
2538}
2539
2540static void
990prepare_cede (struct transfer_args *ta) 2541slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
991{ 2542{
992 LOCK; 2543 struct coro *next = (struct coro *)slf_frame.data;
993 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994 UNLOCK;
995 2544
2545 SvREFCNT_inc_NN (next->hv);
996 prepare_schedule (ta); 2546 prepare_schedule_to (aTHX_ ta, next);
997} 2547}
998 2548
999static void 2549static void
1000api_schedule (void) 2550slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1001{ 2551{
1002 dTHX; 2552 if (!items)
2553 croak ("Coro::schedule_to expects a coroutine argument, caught");
2554
2555 frame->data = (void *)SvSTATE (arg [0]);
2556 frame->prepare = slf_prepare_schedule_to;
2557 frame->check = slf_check_nop;
2558}
2559
2560static void
2561slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 api_ready (aTHX_ SvRV (coro_current));
2564
2565 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2566}
2567
2568static void
2569slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2570{
2571 frame->prepare = prepare_cede;
2572 frame->check = slf_check_nop;
2573}
2574
2575static void
2576slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2577{
2578 frame->prepare = prepare_cede_notself;
2579 frame->check = slf_check_nop;
2580}
2581
2582/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2583static void
2584slf_destroy (pTHX_ struct coro *coro)
2585{
2586 /* this callback is reserved for slf functions needing to do cleanup */
2587 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2588 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2589
2590 /*
2591 * The on_destroy above most likely is from an SLF call.
2592 * Since by definition the SLF call will not finish when we destroy
2593 * the coro, we will have to force-finish it here, otherwise
2594 * cleanup functions cannot call SLF functions.
2595 */
2596 coro->slf_frame.prepare = 0;
2597}
2598
2599/*
2600 * these not obviously related functions are all rolled into one
2601 * function to increase chances that they all will call transfer with the same
2602 * stack offset
2603 * SLF stands for "schedule-like-function".
2604 */
2605static OP *
2606pp_slf (pTHX)
2607{
2608 I32 checkmark; /* mark SP to see how many elements check has pushed */
2609
2610 /* set up the slf frame, unless it has already been set-up */
2611 /* the latter happens when a new coro has been started */
2612 /* or when a new cctx was attached to an existing coroutine */
2613 if (ecb_expect_true (!slf_frame.prepare))
2614 {
2615 /* first iteration */
2616 dSP;
2617 SV **arg = PL_stack_base + TOPMARK + 1;
2618 int items = SP - arg; /* args without function object */
2619 SV *gv = *sp;
2620
2621 /* do a quick consistency check on the "function" object, and if it isn't */
2622 /* for us, divert to the real entersub */
2623 if (SvTYPE (gv) != SVt_PVGV
2624 || !GvCV (gv)
2625 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2626 return PL_ppaddr[OP_ENTERSUB](aTHX);
2627
2628 if (!(PL_op->op_flags & OPf_STACKED))
2629 {
2630 /* ampersand-form of call, use @_ instead of stack */
2631 AV *av = GvAV (PL_defgv);
2632 arg = AvARRAY (av);
2633 items = AvFILLp (av) + 1;
2634 }
2635
2636 /* now call the init function, which needs to set up slf_frame */
2637 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2638 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2639
2640 /* pop args */
2641 SP = PL_stack_base + POPMARK;
2642
2643 PUTBACK;
2644 }
2645
2646 /* now that we have a slf_frame, interpret it! */
2647 /* we use a callback system not to make the code needlessly */
2648 /* complicated, but so we can run multiple perl coros from one cctx */
2649
2650 do
2651 {
1003 struct transfer_args ta; 2652 struct coro_transfer_args ta;
1004 2653
1005 prepare_schedule (&ta); 2654 slf_frame.prepare (aTHX_ &ta);
1006 TRANSFER (ta); 2655 TRANSFER (ta, 0);
1007}
1008 2656
2657 checkmark = PL_stack_sp - PL_stack_base;
2658 }
2659 while (slf_frame.check (aTHX_ &slf_frame));
2660
2661 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2662
2663 /* exception handling */
2664 if (ecb_expect_false (CORO_THROW))
2665 {
2666 SV *exception = sv_2mortal (CORO_THROW);
2667
2668 CORO_THROW = 0;
2669 sv_setsv (ERRSV, exception);
2670 croak (0);
2671 }
2672
2673 /* return value handling - mostly like entersub */
2674 /* make sure we put something on the stack in scalar context */
2675 if (GIMME_V == G_SCALAR
2676 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2677 {
2678 dSP;
2679 SV **bot = PL_stack_base + checkmark;
2680
2681 if (sp == bot) /* too few, push undef */
2682 bot [1] = &PL_sv_undef;
2683 else /* too many, take last one */
2684 bot [1] = *sp;
2685
2686 SP = bot + 1;
2687
2688 PUTBACK;
2689 }
2690
2691 return NORMAL;
2692}
2693
2694static void
2695api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2696{
2697 int i;
2698 SV **arg = PL_stack_base + ax;
2699 int items = PL_stack_sp - arg + 1;
2700
2701 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2702
2703 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2704 && PL_op->op_ppaddr != pp_slf)
2705 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2706
2707 CvFLAGS (cv) |= CVf_SLF;
2708 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2709 slf_cv = cv;
2710
2711 /* we patch the op, and then re-run the whole call */
2712 /* we have to put the same argument on the stack for this to work */
2713 /* and this will be done by pp_restore */
2714 slf_restore.op_next = (OP *)&slf_restore;
2715 slf_restore.op_type = OP_CUSTOM;
2716 slf_restore.op_ppaddr = pp_restore;
2717 slf_restore.op_first = PL_op;
2718
2719 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2720
2721 if (PL_op->op_flags & OPf_STACKED)
2722 {
2723 if (items > slf_arga)
2724 {
2725 slf_arga = items;
2726 Safefree (slf_argv);
2727 New (0, slf_argv, slf_arga, SV *);
2728 }
2729
2730 slf_argc = items;
2731
2732 for (i = 0; i < items; ++i)
2733 slf_argv [i] = SvREFCNT_inc (arg [i]);
2734 }
2735 else
2736 slf_argc = 0;
2737
2738 PL_op->op_ppaddr = pp_slf;
2739 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2740
2741 PL_op = (OP *)&slf_restore;
2742}
2743
2744/*****************************************************************************/
2745/* dynamic wind */
2746
2747static void
2748on_enterleave_call (pTHX_ SV *cb)
2749{
2750 dSP;
2751
2752 PUSHSTACK;
2753
2754 PUSHMARK (SP);
2755 PUTBACK;
2756 call_sv (cb, G_VOID | G_DISCARD);
2757 SPAGAIN;
2758
2759 POPSTACK;
2760}
2761
2762static SV *
2763coro_avp_pop_and_free (pTHX_ AV **avp)
2764{
2765 AV *av = *avp;
2766 SV *res = av_pop (av);
2767
2768 if (AvFILLp (av) < 0)
2769 {
2770 *avp = 0;
2771 SvREFCNT_dec (av);
2772 }
2773
2774 return res;
2775}
2776
2777static void
2778coro_pop_on_enter (pTHX_ void *coro)
2779{
2780 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2781 SvREFCNT_dec (cb);
2782}
2783
2784static void
2785coro_pop_on_leave (pTHX_ void *coro)
2786{
2787 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2788 on_enterleave_call (aTHX_ sv_2mortal (cb));
2789}
2790
2791/*****************************************************************************/
2792/* PerlIO::cede */
2793
2794typedef struct
2795{
2796 PerlIOBuf base;
2797 NV next, every;
2798} PerlIOCede;
2799
2800static IV ecb_cold
2801PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2802{
2803 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2804
2805 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2806 self->next = nvtime () + self->every;
2807
2808 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2809}
2810
2811static SV * ecb_cold
2812PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2813{
2814 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2815
2816 return newSVnv (self->every);
2817}
2818
2819static IV
2820PerlIOCede_flush (pTHX_ PerlIO *f)
2821{
2822 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2823 double now = nvtime ();
2824
2825 if (now >= self->next)
2826 {
2827 api_cede (aTHX);
2828 self->next = now + self->every;
2829 }
2830
2831 return PerlIOBuf_flush (aTHX_ f);
2832}
2833
2834static PerlIO_funcs PerlIO_cede =
2835{
2836 sizeof(PerlIO_funcs),
2837 "cede",
2838 sizeof(PerlIOCede),
2839 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2840 PerlIOCede_pushed,
2841 PerlIOBuf_popped,
2842 PerlIOBuf_open,
2843 PerlIOBase_binmode,
2844 PerlIOCede_getarg,
2845 PerlIOBase_fileno,
2846 PerlIOBuf_dup,
2847 PerlIOBuf_read,
2848 PerlIOBuf_unread,
2849 PerlIOBuf_write,
2850 PerlIOBuf_seek,
2851 PerlIOBuf_tell,
2852 PerlIOBuf_close,
2853 PerlIOCede_flush,
2854 PerlIOBuf_fill,
2855 PerlIOBase_eof,
2856 PerlIOBase_error,
2857 PerlIOBase_clearerr,
2858 PerlIOBase_setlinebuf,
2859 PerlIOBuf_get_base,
2860 PerlIOBuf_bufsiz,
2861 PerlIOBuf_get_ptr,
2862 PerlIOBuf_get_cnt,
2863 PerlIOBuf_set_ptrcnt,
2864};
2865
2866/*****************************************************************************/
2867/* Coro::Semaphore & Coro::Signal */
2868
2869static SV *
2870coro_waitarray_new (pTHX_ int count)
2871{
2872 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2873 AV *av = newAV ();
2874 SV **ary;
2875
2876 /* unfortunately, building manually saves memory */
2877 Newx (ary, 2, SV *);
2878 AvALLOC (av) = ary;
2879#if PERL_VERSION_ATLEAST (5,10,0)
2880 AvARRAY (av) = ary;
2881#else
2882 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2883 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2884 SvPVX ((SV *)av) = (char *)ary;
2885#endif
2886 AvMAX (av) = 1;
2887 AvFILLp (av) = 0;
2888 ary [0] = newSViv (count);
2889
2890 return newRV_noinc ((SV *)av);
2891}
2892
2893/* semaphore */
2894
2895static void
2896coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2897{
2898 SV *count_sv = AvARRAY (av)[0];
2899 IV count = SvIVX (count_sv);
2900
2901 count += adjust;
2902 SvIVX (count_sv) = count;
2903
2904 /* now wake up as many waiters as are expected to lock */
2905 while (count > 0 && AvFILLp (av) > 0)
2906 {
2907 SV *cb;
2908
2909 /* swap first two elements so we can shift a waiter */
2910 AvARRAY (av)[0] = AvARRAY (av)[1];
2911 AvARRAY (av)[1] = count_sv;
2912 cb = av_shift (av);
2913
2914 if (SvOBJECT (cb))
2915 {
2916 api_ready (aTHX_ cb);
2917 --count;
2918 }
2919 else if (SvTYPE (cb) == SVt_PVCV)
2920 {
2921 dSP;
2922 PUSHMARK (SP);
2923 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2924 PUTBACK;
2925 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2926 }
2927
2928 SvREFCNT_dec (cb);
2929 }
2930}
2931
2932static void
2933coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2934{
2935 /* call $sem->adjust (0) to possibly wake up some other waiters */
2936 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2937}
2938
1009static void 2939static int
1010api_cede (void) 2940slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1011{ 2941{
1012 dTHX; 2942 AV *av = (AV *)frame->data;
1013 struct transfer_args ta; 2943 SV *count_sv = AvARRAY (av)[0];
2944 SV *coro_hv = SvRV (coro_current);
1014 2945
1015 prepare_cede (&ta); 2946 /* if we are about to throw, don't actually acquire the lock, just throw */
1016 TRANSFER (ta); 2947 if (CORO_THROW)
1017} 2948 return 0;
2949 else if (SvIVX (count_sv) > 0)
2950 {
2951 frame->destroy = 0;
1018 2952
2953 if (acquire)
2954 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2955 else
2956 coro_semaphore_adjust (aTHX_ av, 0);
2957
2958 return 0;
2959 }
2960 else
2961 {
2962 int i;
2963 /* if we were woken up but can't down, we look through the whole */
2964 /* waiters list and only add us if we aren't in there already */
2965 /* this avoids some degenerate memory usage cases */
2966 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2967 if (AvARRAY (av)[i] == coro_hv)
2968 return 1;
2969
2970 av_push (av, SvREFCNT_inc (coro_hv));
2971 return 1;
2972 }
2973}
2974
2975static int
2976slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2977{
2978 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2979}
2980
2981static int
2982slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2983{
2984 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2985}
2986
2987static void
2988slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2989{
2990 AV *av = (AV *)SvRV (arg [0]);
2991
2992 if (SvIVX (AvARRAY (av)[0]) > 0)
2993 {
2994 frame->data = (void *)av;
2995 frame->prepare = prepare_nop;
2996 }
2997 else
2998 {
2999 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3000
3001 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3002 frame->prepare = prepare_schedule;
3003 /* to avoid race conditions when a woken-up coro gets terminated */
3004 /* we arrange for a temporary on_destroy that calls adjust (0) */
3005 frame->destroy = coro_semaphore_destroy;
3006 }
3007}
3008
3009static void
3010slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3011{
3012 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3013 frame->check = slf_check_semaphore_down;
3014}
3015
3016static void
3017slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3018{
3019 if (items >= 2)
3020 {
3021 /* callback form */
3022 AV *av = (AV *)SvRV (arg [0]);
3023 SV *cb_cv = s_get_cv_croak (arg [1]);
3024
3025 av_push (av, SvREFCNT_inc_NN (cb_cv));
3026
3027 if (SvIVX (AvARRAY (av)[0]) > 0)
3028 coro_semaphore_adjust (aTHX_ av, 0);
3029
3030 frame->prepare = prepare_nop;
3031 frame->check = slf_check_nop;
3032 }
3033 else
3034 {
3035 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3036 frame->check = slf_check_semaphore_wait;
3037 }
3038}
3039
3040/* signal */
3041
3042static void
3043coro_signal_wake (pTHX_ AV *av, int count)
3044{
3045 SvIVX (AvARRAY (av)[0]) = 0;
3046
3047 /* now signal count waiters */
3048 while (count > 0 && AvFILLp (av) > 0)
3049 {
3050 SV *cb;
3051
3052 /* swap first two elements so we can shift a waiter */
3053 cb = AvARRAY (av)[0];
3054 AvARRAY (av)[0] = AvARRAY (av)[1];
3055 AvARRAY (av)[1] = cb;
3056
3057 cb = av_shift (av);
3058
3059 if (SvTYPE (cb) == SVt_PVCV)
3060 {
3061 dSP;
3062 PUSHMARK (SP);
3063 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3064 PUTBACK;
3065 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3066 }
3067 else
3068 {
3069 api_ready (aTHX_ cb);
3070 sv_setiv (cb, 0); /* signal waiter */
3071 }
3072
3073 SvREFCNT_dec (cb);
3074
3075 --count;
3076 }
3077}
3078
3079static int
3080slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3081{
3082 /* if we are about to throw, also stop waiting */
3083 return SvROK ((SV *)frame->data) && !CORO_THROW;
3084}
3085
3086static void
3087slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3088{
3089 AV *av = (AV *)SvRV (arg [0]);
3090
3091 if (items >= 2)
3092 {
3093 SV *cb_cv = s_get_cv_croak (arg [1]);
3094 av_push (av, SvREFCNT_inc_NN (cb_cv));
3095
3096 if (SvIVX (AvARRAY (av)[0]))
3097 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3098
3099 frame->prepare = prepare_nop;
3100 frame->check = slf_check_nop;
3101 }
3102 else if (SvIVX (AvARRAY (av)[0]))
3103 {
3104 SvIVX (AvARRAY (av)[0]) = 0;
3105 frame->prepare = prepare_nop;
3106 frame->check = slf_check_nop;
3107 }
3108 else
3109 {
3110 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3111
3112 av_push (av, waiter);
3113
3114 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3115 frame->prepare = prepare_schedule;
3116 frame->check = slf_check_signal_wait;
3117 }
3118}
3119
3120/*****************************************************************************/
3121/* Coro::AIO */
3122
3123#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3124
3125/* helper storage struct */
3126struct io_state
3127{
3128 int errorno;
3129 I32 laststype; /* U16 in 5.10.0 */
3130 int laststatval;
3131 Stat_t statcache;
3132};
3133
3134static void
3135coro_aio_callback (pTHX_ CV *cv)
3136{
3137 dXSARGS;
3138 AV *state = (AV *)S_GENSUB_ARG;
3139 SV *coro = av_pop (state);
3140 SV *data_sv = newSV (sizeof (struct io_state));
3141
3142 av_extend (state, items - 1);
3143
3144 sv_upgrade (data_sv, SVt_PV);
3145 SvCUR_set (data_sv, sizeof (struct io_state));
3146 SvPOK_only (data_sv);
3147
3148 {
3149 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3150
3151 data->errorno = errno;
3152 data->laststype = PL_laststype;
3153 data->laststatval = PL_laststatval;
3154 data->statcache = PL_statcache;
3155 }
3156
3157 /* now build the result vector out of all the parameters and the data_sv */
3158 {
3159 int i;
3160
3161 for (i = 0; i < items; ++i)
3162 av_push (state, SvREFCNT_inc_NN (ST (i)));
3163 }
3164
3165 av_push (state, data_sv);
3166
3167 api_ready (aTHX_ coro);
3168 SvREFCNT_dec (coro);
3169 SvREFCNT_dec ((AV *)state);
3170}
3171
3172static int
3173slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3174{
3175 AV *state = (AV *)frame->data;
3176
3177 /* if we are about to throw, return early */
3178 /* this does not cancel the aio request, but at least */
3179 /* it quickly returns */
3180 if (CORO_THROW)
3181 return 0;
3182
3183 /* one element that is an RV? repeat! */
3184 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3185 return 1;
3186
3187 /* restore status */
3188 {
3189 SV *data_sv = av_pop (state);
3190 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3191
3192 errno = data->errorno;
3193 PL_laststype = data->laststype;
3194 PL_laststatval = data->laststatval;
3195 PL_statcache = data->statcache;
3196
3197 SvREFCNT_dec (data_sv);
3198 }
3199
3200 /* push result values */
3201 {
3202 dSP;
3203 int i;
3204
3205 EXTEND (SP, AvFILLp (state) + 1);
3206 for (i = 0; i <= AvFILLp (state); ++i)
3207 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3208
3209 PUTBACK;
3210 }
3211
3212 return 0;
3213}
3214
3215static void
3216slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3217{
3218 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3219 SV *coro_hv = SvRV (coro_current);
3220 struct coro *coro = SvSTATE_hv (coro_hv);
3221
3222 /* put our coroutine id on the state arg */
3223 av_push (state, SvREFCNT_inc_NN (coro_hv));
3224
3225 /* first see whether we have a non-zero priority and set it as AIO prio */
3226 if (coro->prio)
3227 {
3228 dSP;
3229
3230 static SV *prio_cv;
3231 static SV *prio_sv;
3232
3233 if (ecb_expect_false (!prio_cv))
3234 {
3235 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3236 prio_sv = newSViv (0);
3237 }
3238
3239 PUSHMARK (SP);
3240 sv_setiv (prio_sv, coro->prio);
3241 XPUSHs (prio_sv);
3242
3243 PUTBACK;
3244 call_sv (prio_cv, G_VOID | G_DISCARD);
3245 }
3246
3247 /* now call the original request */
3248 {
3249 dSP;
3250 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3251 int i;
3252
3253 PUSHMARK (SP);
3254
3255 /* first push all args to the stack */
3256 EXTEND (SP, items + 1);
3257
3258 for (i = 0; i < items; ++i)
3259 PUSHs (arg [i]);
3260
3261 /* now push the callback closure */
3262 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3263
3264 /* now call the AIO function - we assume our request is uncancelable */
3265 PUTBACK;
3266 call_sv ((SV *)req, G_VOID | G_DISCARD);
3267 }
3268
3269 /* now that the request is going, we loop till we have a result */
3270 frame->data = (void *)state;
3271 frame->prepare = prepare_schedule;
3272 frame->check = slf_check_aio_req;
3273}
3274
3275static void
3276coro_aio_req_xs (pTHX_ CV *cv)
3277{
3278 dXSARGS;
3279
3280 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3281
3282 XSRETURN_EMPTY;
3283}
3284
3285/*****************************************************************************/
3286
3287#if CORO_CLONE
3288# include "clone.c"
3289#endif
3290
3291/*****************************************************************************/
3292
3293static SV *
3294coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3295{
3296 SV *coro_sv;
3297 struct coro *coro;
3298 MAGIC *mg;
3299 HV *hv;
3300 SV *cb;
3301 int i;
3302
3303 if (argc > 0)
3304 {
3305 cb = s_get_cv_croak (argv [0]);
3306
3307 if (!is_coro)
3308 {
3309 if (CvISXSUB (cb))
3310 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3311
3312 if (!CvROOT (cb))
3313 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3314 }
3315 }
3316
3317 Newz (0, coro, 1, struct coro);
3318 coro->args = newAV ();
3319 coro->flags = CF_NEW;
3320
3321 if (coro_first) coro_first->prev = coro;
3322 coro->next = coro_first;
3323 coro_first = coro;
3324
3325 coro->hv = hv = newHV ();
3326 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3327 mg->mg_flags |= MGf_DUP;
3328 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3329
3330 if (argc > 0)
3331 {
3332 av_extend (coro->args, argc + is_coro - 1);
3333
3334 if (is_coro)
3335 {
3336 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3337 cb = (SV *)cv_coro_run;
3338 }
3339
3340 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3341
3342 for (i = 1; i < argc; i++)
3343 av_push (coro->args, newSVsv (argv [i]));
3344 }
3345
3346 return coro_sv;
3347}
3348
3349#ifndef __cplusplus
3350ecb_cold XS(boot_Coro__State);
3351#endif
3352
3353#if CORO_JIT
3354
3355static void ecb_noinline ecb_cold
3356pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3357{
3358 dSP;
3359 AV *av = newAV ();
3360
3361 av_store (av, 3, newSVuv (d));
3362 av_store (av, 2, newSVuv (c));
3363 av_store (av, 1, newSVuv (b));
3364 av_store (av, 0, newSVuv (a));
3365
3366 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3367
3368 PUTBACK;
3369}
3370
3371static void ecb_noinline ecb_cold
3372jit_init (pTHX)
3373{
3374 dSP;
3375 SV *load, *save;
3376 char *map_base;
3377 char *load_ptr, *save_ptr;
3378 STRLEN load_len, save_len, map_len;
3379 int count;
3380
3381 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3382
3383 PUSHMARK (SP);
3384 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3385 #include "state.h"
3386 count = call_pv ("Coro::State::_jit", G_ARRAY);
3387 SPAGAIN;
3388
3389 save = POPs; save_ptr = SvPVbyte (save, save_len);
3390 load = POPs; load_ptr = SvPVbyte (load, load_len);
3391
3392 map_len = load_len + save_len + 16;
3393
3394 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3395
3396 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3397
3398 load_perl_slots = (load_save_perl_slots_type)map_base;
3399 memcpy (map_base, load_ptr, load_len);
3400
3401 map_base += (load_len + 15) & ~15;
3402
3403 save_perl_slots = (load_save_perl_slots_type)map_base;
3404 memcpy (map_base, save_ptr, save_len);
3405
3406 /* we are good citizens and try to make the page read-only, so the evil evil */
3407 /* hackers might have it a bit more difficult */
3408 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3409
3410 PUTBACK;
3411 eval_pv ("undef &Coro::State::_jit", 1);
3412}
3413
3414#endif
3415
1019MODULE = Coro::State PACKAGE = Coro::State 3416MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1020 3417
1021PROTOTYPES: DISABLE 3418PROTOTYPES: DISABLE
1022 3419
1023BOOT: 3420BOOT:
1024{ 3421{
1025#ifdef USE_ITHREADS 3422#ifdef USE_ITHREADS
1026 MUTEX_INIT (&coro_mutex); 3423# if CORO_PTHREAD
3424 coro_thx = PERL_GET_CONTEXT;
1027#endif 3425# endif
1028 BOOT_PAGESIZE; 3426#endif
3427 /* perl defines these to check for existance first, but why it doesn't */
3428 /* just create them one at init time is not clear to me, except for */
3429 /* programs trying to delete them, but... */
3430 /* anyway, we declare this as invalid and make sure they are initialised here */
3431 DEFSV;
3432 ERRSV;
3433
3434 cctx_current = cctx_new_empty ();
3435
3436 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3437 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3438
3439 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3440 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3441 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3442
3443 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3444 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3445 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1029 3446
1030 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3447 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031 3448
1032 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3449 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1033 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3450 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1034 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3451 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3452 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1035 3453
1036 main_mainstack = PL_mainstack; 3454 main_mainstack = PL_mainstack;
3455 main_top_env = PL_top_env;
1037 3456
3457 while (main_top_env->je_prev)
3458 main_top_env = main_top_env->je_prev;
3459
3460 {
3461 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3462
3463 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3464 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3465
3466 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3467 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3468 }
3469
1038 coroapi.ver = CORO_API_VERSION; 3470 coroapi.ver = CORO_API_VERSION;
3471 coroapi.rev = CORO_API_REVISION;
3472
1039 coroapi.transfer = api_transfer; 3473 coroapi.transfer = api_transfer;
1040 3474
3475 coroapi.sv_state = SvSTATE_;
3476 coroapi.execute_slf = api_execute_slf;
3477 coroapi.prepare_nop = prepare_nop;
3478 coroapi.prepare_schedule = prepare_schedule;
3479 coroapi.prepare_cede = prepare_cede;
3480 coroapi.prepare_cede_notself = prepare_cede_notself;
3481
3482 time_init (aTHX);
3483
1041 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3484 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3485#if CORO_JIT
3486 PUTBACK;
3487 jit_init (aTHX);
3488 SPAGAIN;
3489#endif
1042} 3490}
1043 3491
1044SV * 3492SV *
1045new (char *klass, ...) 3493new (SV *klass, ...)
3494 ALIAS:
3495 Coro::new = 1
1046 CODE: 3496 CODE:
1047{ 3497 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1048 struct coro *coro; 3498 OUTPUT:
1049 HV *hv; 3499 RETVAL
1050 int i;
1051 3500
1052 Newz (0, coro, 1, struct coro); 3501void
1053 coro->args = newAV (); 3502transfer (...)
3503 PROTOTYPE: $$
3504 CODE:
3505 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1054 3506
3507SV *
3508clone (Coro::State coro)
3509 CODE:
3510{
3511#if CORO_CLONE
3512 struct coro *ncoro = coro_clone (aTHX_ coro);
3513 MAGIC *mg;
3514 /* TODO: too much duplication */
1055 hv = newHV (); 3515 ncoro->hv = newHV ();
1056 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3516 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3517 mg->mg_flags |= MGf_DUP;
1057 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3518 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3519#else
3520 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3521#endif
3522}
3523 OUTPUT:
3524 RETVAL
1058 3525
1059 for (i = 1; i < items; i++) 3526int
1060 av_push (coro->args, newSVsv (ST (i))); 3527cctx_stacksize (int new_stacksize = 0)
3528 PROTOTYPE: ;$
3529 CODE:
3530 RETVAL = cctx_stacksize;
3531 if (new_stacksize)
3532 {
3533 cctx_stacksize = new_stacksize;
3534 ++cctx_gen;
3535 }
3536 OUTPUT:
3537 RETVAL
1061 3538
1062 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3539int
1063 /*coro->stack = 0;*/ 3540cctx_max_idle (int max_idle = 0)
3541 PROTOTYPE: ;$
3542 CODE:
3543 RETVAL = cctx_max_idle;
3544 if (max_idle > 1)
3545 cctx_max_idle = max_idle;
3546 OUTPUT:
3547 RETVAL
3548
3549int
3550cctx_count ()
3551 PROTOTYPE:
3552 CODE:
3553 RETVAL = cctx_count;
3554 OUTPUT:
3555 RETVAL
3556
3557int
3558cctx_idle ()
3559 PROTOTYPE:
3560 CODE:
3561 RETVAL = cctx_idle;
3562 OUTPUT:
3563 RETVAL
3564
3565void
3566list ()
3567 PROTOTYPE:
3568 PPCODE:
3569{
3570 struct coro *coro;
3571 for (coro = coro_first; coro; coro = coro->next)
3572 if (coro->hv)
3573 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3574}
3575
3576void
3577call (Coro::State coro, SV *coderef)
3578 ALIAS:
3579 eval = 1
3580 CODE:
3581{
3582 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3583 {
3584 struct coro *current = SvSTATE_current;
3585 struct CoroSLF slf_save;
3586
3587 if (current != coro)
3588 {
3589 PUTBACK;
3590 save_perl (aTHX_ current);
3591 load_perl (aTHX_ coro);
3592 /* the coro is most likely in an active SLF call.
3593 * while not strictly required (the code we execute is
3594 * not allowed to call any SLF functions), it's cleaner
3595 * to reinitialise the slf_frame and restore it later.
3596 * This might one day allow us to actually do SLF calls
3597 * from code executed here.
3598 */
3599 slf_save = slf_frame;
3600 slf_frame.prepare = 0;
3601 SPAGAIN;
3602 }
3603
3604 PUSHSTACK;
3605
3606 PUSHMARK (SP);
3607 PUTBACK;
3608
3609 if (ix)
3610 eval_sv (coderef, 0);
3611 else
3612 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3613
3614 POPSTACK;
3615 SPAGAIN;
3616
3617 if (current != coro)
3618 {
3619 PUTBACK;
3620 slf_frame = slf_save;
3621 save_perl (aTHX_ coro);
3622 load_perl (aTHX_ current);
3623 SPAGAIN;
3624 }
3625 }
3626}
3627
3628SV *
3629is_ready (Coro::State coro)
3630 PROTOTYPE: $
3631 ALIAS:
3632 is_ready = CF_READY
3633 is_running = CF_RUNNING
3634 is_new = CF_NEW
3635 is_destroyed = CF_ZOMBIE
3636 is_zombie = CF_ZOMBIE
3637 is_suspended = CF_SUSPENDED
3638 CODE:
3639 RETVAL = boolSV (coro->flags & ix);
3640 OUTPUT:
3641 RETVAL
3642
3643void
3644throw (SV *self, SV *exception = &PL_sv_undef)
3645 PROTOTYPE: $;$
3646 CODE:
3647{
3648 struct coro *coro = SvSTATE (self);
3649 struct coro *current = SvSTATE_current;
3650 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3651 SvREFCNT_dec (*exceptionp);
3652 SvGETMAGIC (exception);
3653 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3654
3655 api_ready (aTHX_ self);
3656}
3657
3658void
3659api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3660 PROTOTYPE: $;$
3661 C_ARGS: aTHX_ coro, flags
3662
3663SV *
3664has_cctx (Coro::State coro)
3665 PROTOTYPE: $
3666 CODE:
3667 /* maybe manage the running flag differently */
3668 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3669 OUTPUT:
3670 RETVAL
3671
3672int
3673is_traced (Coro::State coro)
3674 PROTOTYPE: $
3675 CODE:
3676 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3677 OUTPUT:
3678 RETVAL
3679
3680UV
3681rss (Coro::State coro)
3682 PROTOTYPE: $
3683 ALIAS:
3684 usecount = 1
3685 CODE:
3686 switch (ix)
3687 {
3688 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3689 case 1: RETVAL = coro->usecount; break;
3690 }
3691 OUTPUT:
3692 RETVAL
3693
3694void
3695force_cctx ()
3696 PROTOTYPE:
3697 CODE:
3698 cctx_current->idle_sp = 0;
3699
3700void
3701swap_defsv (Coro::State self)
3702 PROTOTYPE: $
3703 ALIAS:
3704 swap_defav = 1
3705 CODE:
3706 if (!self->slot)
3707 croak ("cannot swap state with coroutine that has no saved state,");
3708 else
3709 {
3710 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3711 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3712
3713 SV *tmp = *src; *src = *dst; *dst = tmp;
3714 }
3715
3716void
3717cancel (Coro::State self)
3718 CODE:
3719 coro_state_destroy (aTHX_ self);
3720
3721SV *
3722enable_times (int enabled = enable_times)
3723 CODE:
3724{
3725 RETVAL = boolSV (enable_times);
3726
3727 if (enabled != enable_times)
3728 {
3729 enable_times = enabled;
3730
3731 coro_times_update ();
3732 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3733 }
1064} 3734}
1065 OUTPUT: 3735 OUTPUT:
1066 RETVAL 3736 RETVAL
1067 3737
1068void 3738void
1069_set_stacklevel (...) 3739times (Coro::State self)
1070 ALIAS: 3740 PPCODE:
1071 Coro::State::transfer = 1
1072 Coro::schedule = 2
1073 Coro::cede = 3
1074 Coro::Cont::yield = 4
1075 CODE:
1076{ 3741{
1077 struct transfer_args ta; 3742 struct coro *current = SvSTATE (coro_current);
1078 3743
1079 switch (ix) 3744 if (ecb_expect_false (current == self))
1080 { 3745 {
1081 case 0: 3746 coro_times_update ();
1082 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3747 coro_times_add (SvSTATE (coro_current));
1083 ta.next = 0;
1084 ta.flags = TRANSFER_SET_STACKLEVEL;
1085 break;
1086
1087 case 1:
1088 if (items != 3)
1089 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1090
1091 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1092 break;
1093
1094 case 2:
1095 prepare_schedule (&ta);
1096 break;
1097
1098 case 3:
1099 prepare_cede (&ta);
1100 break;
1101
1102 case 4:
1103 {
1104 SV *yieldstack;
1105 SV *sv;
1106 AV *defav = GvAV (PL_defgv);
1107
1108 yieldstack = *hv_fetch (
1109 (HV *)SvRV (GvSV (coro_current)),
1110 "yieldstack", sizeof ("yieldstack") - 1,
1111 0
1112 );
1113
1114 /* set up @_ -- ugly */
1115 av_clear (defav);
1116 av_fill (defav, items - 1);
1117 while (items--)
1118 av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120 sv = av_pop ((AV *)SvRV (yieldstack));
1121 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123 ta.flags = 0;
1124 SvREFCNT_dec (sv);
1125 }
1126 break;
1127
1128 } 3748 }
1129 3749
1130 TRANSFER (ta); 3750 EXTEND (SP, 2);
3751 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3752 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3753
3754 if (ecb_expect_false (current == self))
3755 coro_times_sub (SvSTATE (coro_current));
1131} 3756}
1132 3757
1133void 3758void
1134_clone_state_from (SV *dst, SV *src) 3759swap_sv (Coro::State coro, SV *sv, SV *swapsv)
1135 CODE: 3760 CODE:
1136{ 3761{
1137 struct coro *coro_src = SvSTATE (src); 3762 struct coro *current = SvSTATE_current;
1138 3763
1139 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3764 if (current == coro)
3765 SWAP_SVS (current);
1140 3766
1141 ++coro_src->refcnt; 3767 if (!coro->swap_sv)
1142 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 3768 coro->swap_sv = newAV ();
1143}
1144 3769
1145void 3770 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
1146_exit (code) 3771 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
1147 int code 3772
1148 PROTOTYPE: $ 3773 if (current == coro)
1149 CODE: 3774 SWAP_SVS (current);
1150 _exit (code); 3775}
3776
1151 3777
1152MODULE = Coro::State PACKAGE = Coro 3778MODULE = Coro::State PACKAGE = Coro
1153 3779
1154BOOT: 3780BOOT:
1155{ 3781{
1156 int i; 3782 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3783 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3784 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3785 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3786 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3787 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3788 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3789 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1157 3790
3791 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3792 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3793 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3794 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3795
1158 coro_stash = gv_stashpv ("Coro", TRUE); 3796 coro_stash = gv_stashpv ("Coro", TRUE);
1159 3797
1160 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3798 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1161 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3799 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1162 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3800 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1163 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3801 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1164 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3802 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1165 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3803 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1166
1167 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1168 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1169
1170 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171 coro_ready[i] = newAV ();
1172 3804
1173 { 3805 {
1174 SV *sv = perl_get_sv("Coro::API", 1); 3806 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1175 3807
1176 coroapi.schedule = api_schedule; 3808 coroapi.schedule = api_schedule;
3809 coroapi.schedule_to = api_schedule_to;
1177 coroapi.cede = api_cede; 3810 coroapi.cede = api_cede;
3811 coroapi.cede_notself = api_cede_notself;
1178 coroapi.ready = api_ready; 3812 coroapi.ready = api_ready;
3813 coroapi.is_ready = api_is_ready;
1179 coroapi.nready = &coro_nready; 3814 coroapi.nready = coro_nready;
1180 coroapi.current = coro_current; 3815 coroapi.current = coro_current;
1181 3816
1182 GCoroAPI = &coroapi; 3817 /*GCoroAPI = &coroapi;*/
1183 sv_setiv (sv, (IV)&coroapi); 3818 sv_setiv (sv, (IV)&coroapi);
1184 SvREADONLY_on (sv); 3819 SvREADONLY_on (sv);
1185 } 3820 }
1186} 3821}
1187 3822
3823SV *
3824async (...)
3825 PROTOTYPE: &@
3826 CODE:
3827 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3828 api_ready (aTHX_ RETVAL);
3829 OUTPUT:
3830 RETVAL
3831
3832void
3833_destroy (Coro::State coro)
3834 CODE:
3835 /* used by the manager thread */
3836 coro_state_destroy (aTHX_ coro);
3837
3838void
3839on_destroy (Coro::State coro, SV *cb)
3840 CODE:
3841 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3842
3843void
3844join (...)
3845 CODE:
3846 CORO_EXECUTE_SLF_XS (slf_init_join);
3847
3848void
3849terminate (...)
3850 CODE:
3851 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3852
3853void
3854cancel (...)
3855 CODE:
3856 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3857
3858int
3859safe_cancel (Coro::State self, ...)
3860 C_ARGS: aTHX_ self, &ST (1), items - 1
3861
3862void
3863schedule (...)
3864 CODE:
3865 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3866
3867void
3868schedule_to (...)
3869 CODE:
3870 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3871
3872void
3873cede_to (...)
3874 CODE:
3875 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3876
3877void
3878cede (...)
3879 CODE:
3880 CORO_EXECUTE_SLF_XS (slf_init_cede);
3881
3882void
3883cede_notself (...)
3884 CODE:
3885 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3886
3887void
3888_set_current (SV *current)
3889 PROTOTYPE: $
3890 CODE:
3891 SvREFCNT_dec (SvRV (coro_current));
3892 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3893
3894void
3895_set_readyhook (SV *hook)
3896 PROTOTYPE: $
3897 CODE:
3898 SvREFCNT_dec (coro_readyhook);
3899 SvGETMAGIC (hook);
3900 if (SvOK (hook))
3901 {
3902 coro_readyhook = newSVsv (hook);
3903 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3904 }
3905 else
3906 {
3907 coro_readyhook = 0;
3908 CORO_READYHOOK = 0;
3909 }
3910
1188int 3911int
1189prio (Coro::State coro, int newprio = 0) 3912prio (Coro::State coro, int newprio = 0)
3913 PROTOTYPE: $;$
1190 ALIAS: 3914 ALIAS:
1191 nice = 1 3915 nice = 1
1192 CODE: 3916 CODE:
1193{ 3917{
1194 RETVAL = coro->prio; 3918 RETVAL = coro->prio;
1195 3919
1196 if (items > 1) 3920 if (items > 1)
1197 { 3921 {
1198 if (ix) 3922 if (ix)
1199 newprio += coro->prio; 3923 newprio = coro->prio - newprio;
1200 3924
1201 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3925 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1202 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3926 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1203 3927
1204 coro->prio = newprio; 3928 coro->prio = newprio;
1205 } 3929 }
1206} 3930}
3931 OUTPUT:
3932 RETVAL
1207 3933
1208void 3934SV *
1209ready (SV *self) 3935ready (SV *self)
1210 PROTOTYPE: $ 3936 PROTOTYPE: $
1211 CODE: 3937 CODE:
1212 api_ready (self); 3938 RETVAL = boolSV (api_ready (aTHX_ self));
3939 OUTPUT:
3940 RETVAL
1213 3941
1214int 3942int
1215nready (...) 3943nready (...)
1216 PROTOTYPE: 3944 PROTOTYPE:
1217 CODE: 3945 CODE:
1218 RETVAL = coro_nready; 3946 RETVAL = coro_nready;
1219 OUTPUT: 3947 OUTPUT:
1220 RETVAL 3948 RETVAL
1221 3949
1222MODULE = Coro::State PACKAGE = Coro::AIO 3950void
3951suspend (Coro::State self)
3952 PROTOTYPE: $
3953 CODE:
3954 self->flags |= CF_SUSPENDED;
3955
3956void
3957resume (Coro::State self)
3958 PROTOTYPE: $
3959 CODE:
3960 self->flags &= ~CF_SUSPENDED;
3961
3962void
3963_pool_handler (...)
3964 CODE:
3965 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3966
3967void
3968async_pool (SV *cv, ...)
3969 PROTOTYPE: &@
3970 PPCODE:
3971{
3972 HV *hv = (HV *)av_pop (av_async_pool);
3973 AV *av = newAV ();
3974 SV *cb = ST (0);
3975 int i;
3976
3977 av_extend (av, items - 2);
3978 for (i = 1; i < items; ++i)
3979 av_push (av, SvREFCNT_inc_NN (ST (i)));
3980
3981 if ((SV *)hv == &PL_sv_undef)
3982 {
3983 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3984 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3985 SvREFCNT_dec (sv);
3986 }
3987
3988 {
3989 struct coro *coro = SvSTATE_hv (hv);
3990
3991 assert (!coro->invoke_cb);
3992 assert (!coro->invoke_av);
3993 coro->invoke_cb = SvREFCNT_inc (cb);
3994 coro->invoke_av = av;
3995 }
3996
3997 api_ready (aTHX_ (SV *)hv);
3998
3999 if (GIMME_V != G_VOID)
4000 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4001 else
4002 SvREFCNT_dec (hv);
4003}
1223 4004
1224SV * 4005SV *
1225_get_state () 4006rouse_cb ()
4007 PROTOTYPE:
1226 CODE: 4008 CODE:
1227{ 4009 RETVAL = coro_new_rouse_cb (aTHX);
1228 struct {
1229 int errorno;
1230 int laststype;
1231 int laststatval;
1232 Stat_t statcache;
1233 } data;
1234
1235 data.errorno = errno;
1236 data.laststype = PL_laststype;
1237 data.laststatval = PL_laststatval;
1238 data.statcache = PL_statcache;
1239
1240 RETVAL = newSVpvn ((char *)&data, sizeof data);
1241}
1242 OUTPUT: 4010 OUTPUT:
1243 RETVAL 4011 RETVAL
1244 4012
1245void 4013void
1246_set_state (char *data_) 4014rouse_wait (...)
4015 PROTOTYPE: ;$
4016 PPCODE:
4017 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4018
4019void
4020on_enter (SV *block)
4021 ALIAS:
4022 on_leave = 1
1247 PROTOTYPE: $ 4023 PROTOTYPE: &
1248 CODE: 4024 CODE:
1249{ 4025{
1250 struct { 4026 struct coro *coro = SvSTATE_current;
4027 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4028
4029 block = s_get_cv_croak (block);
4030
4031 if (!*avp)
4032 *avp = newAV ();
4033
4034 av_push (*avp, SvREFCNT_inc (block));
4035
4036 if (!ix)
4037 on_enterleave_call (aTHX_ block);
4038
4039 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4040 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4041 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4042}
4043
4044
4045MODULE = Coro::State PACKAGE = PerlIO::cede
4046
4047BOOT:
4048 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4049
4050
4051MODULE = Coro::State PACKAGE = Coro::Semaphore
4052
4053SV *
4054new (SV *klass, SV *count = 0)
4055 CODE:
4056{
4057 int semcnt = 1;
4058
4059 if (count)
4060 {
4061 SvGETMAGIC (count);
4062
4063 if (SvOK (count))
4064 semcnt = SvIV (count);
4065 }
4066
4067 RETVAL = sv_bless (
4068 coro_waitarray_new (aTHX_ semcnt),
4069 GvSTASH (CvGV (cv))
4070 );
4071}
4072 OUTPUT:
4073 RETVAL
4074
4075# helper for Coro::Channel and others
4076SV *
4077_alloc (int count)
4078 CODE:
4079 RETVAL = coro_waitarray_new (aTHX_ count);
4080 OUTPUT:
4081 RETVAL
4082
4083SV *
4084count (SV *self)
4085 CODE:
4086 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4087 OUTPUT:
4088 RETVAL
4089
4090void
4091up (SV *self, int adjust = 1)
4092 ALIAS:
4093 adjust = 1
4094 CODE:
4095 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4096
4097void
4098down (...)
4099 CODE:
4100 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4101
4102void
4103wait (...)
4104 CODE:
4105 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4106
4107void
4108try (SV *self)
4109 PPCODE:
4110{
4111 AV *av = (AV *)SvRV (self);
4112 SV *count_sv = AvARRAY (av)[0];
4113 IV count = SvIVX (count_sv);
4114
4115 if (count > 0)
4116 {
4117 --count;
4118 SvIVX (count_sv) = count;
4119 XSRETURN_YES;
4120 }
4121 else
4122 XSRETURN_NO;
4123}
4124
4125void
4126waiters (SV *self)
4127 PPCODE:
4128{
4129 AV *av = (AV *)SvRV (self);
4130 int wcount = AvFILLp (av) + 1 - 1;
4131
4132 if (GIMME_V == G_SCALAR)
4133 XPUSHs (sv_2mortal (newSViv (wcount)));
4134 else
4135 {
1251 int errorno; 4136 int i;
1252 int laststype; 4137 EXTEND (SP, wcount);
1253 int laststatval; 4138 for (i = 1; i <= wcount; ++i)
1254 Stat_t statcache; 4139 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1255 } *data = (void *)data_; 4140 }
1256
1257 errno = data->errorno;
1258 PL_laststype = data->laststype;
1259 PL_laststatval = data->laststatval;
1260 PL_statcache = data->statcache;
1261} 4141}
4142
4143MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4144
4145void
4146_may_delete (SV *sem, int count, unsigned int extra_refs)
4147 PPCODE:
4148{
4149 AV *av = (AV *)SvRV (sem);
4150
4151 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4152 && AvFILLp (av) == 0 /* no waiters, just count */
4153 && SvIV (AvARRAY (av)[0]) == count)
4154 XSRETURN_YES;
4155
4156 XSRETURN_NO;
4157}
4158
4159MODULE = Coro::State PACKAGE = Coro::Signal
4160
4161SV *
4162new (SV *klass)
4163 CODE:
4164 RETVAL = sv_bless (
4165 coro_waitarray_new (aTHX_ 0),
4166 GvSTASH (CvGV (cv))
4167 );
4168 OUTPUT:
4169 RETVAL
4170
4171void
4172wait (...)
4173 CODE:
4174 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4175
4176void
4177broadcast (SV *self)
4178 CODE:
4179{
4180 AV *av = (AV *)SvRV (self);
4181 coro_signal_wake (aTHX_ av, AvFILLp (av));
4182}
4183
4184void
4185send (SV *self)
4186 CODE:
4187{
4188 AV *av = (AV *)SvRV (self);
4189
4190 if (AvFILLp (av))
4191 coro_signal_wake (aTHX_ av, 1);
4192 else
4193 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4194}
4195
4196IV
4197awaited (SV *self)
4198 CODE:
4199 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4200 OUTPUT:
4201 RETVAL
4202
4203
4204MODULE = Coro::State PACKAGE = Coro::AnyEvent
4205
4206BOOT:
4207 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4208
4209void
4210_schedule (...)
4211 CODE:
4212{
4213 static int incede;
4214
4215 api_cede_notself (aTHX);
4216
4217 ++incede;
4218 while (coro_nready >= incede && api_cede (aTHX))
4219 ;
4220
4221 sv_setsv (sv_activity, &PL_sv_undef);
4222 if (coro_nready >= incede)
4223 {
4224 PUSHMARK (SP);
4225 PUTBACK;
4226 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4227 }
4228
4229 --incede;
4230}
4231
4232
4233MODULE = Coro::State PACKAGE = Coro::AIO
4234
4235void
4236_register (char *target, char *proto, SV *req)
4237 CODE:
4238{
4239 SV *req_cv = s_get_cv_croak (req);
4240 /* newXSproto doesn't return the CV on 5.8 */
4241 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4242 sv_setpv ((SV *)slf_cv, proto);
4243 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4244}
4245
4246MODULE = Coro::State PACKAGE = Coro::Select
4247
4248void
4249patch_pp_sselect ()
4250 CODE:
4251 if (!coro_old_pp_sselect)
4252 {
4253 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4254 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4255 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4256 }
4257
4258void
4259unpatch_pp_sselect ()
4260 CODE:
4261 if (coro_old_pp_sselect)
4262 {
4263 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4264 coro_old_pp_sselect = 0;
4265 }
4266
4267MODULE = Coro::State PACKAGE = Coro::Util
4268
4269void
4270_exit (int code)
4271 CODE:
4272 _exit (code);
4273
4274NV
4275time ()
4276 CODE:
4277 RETVAL = nvtime (aTHX);
4278 OUTPUT:
4279 RETVAL
4280
4281NV
4282gettimeofday ()
4283 PPCODE:
4284{
4285 UV tv [2];
4286 u2time (aTHX_ tv);
4287 EXTEND (SP, 2);
4288 PUSHs (sv_2mortal (newSVuv (tv [0])));
4289 PUSHs (sv_2mortal (newSVuv (tv [1])));
4290}
4291

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