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Comparing Coro/Coro/State.xs (file contents):
Revision 1.204 by root, Mon Oct 8 03:03:39 2007 UTC vs.
Revision 1.404 by root, Fri Jun 10 12:27:02 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
9 15
10#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
11 18
19#include <stddef.h>
12#include <stdio.h> 20#include <stdio.h>
13#include <errno.h> 21#include <errno.h>
14#include <assert.h> 22#include <assert.h>
23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
15 37
16#ifdef HAVE_MMAP 38#ifdef HAVE_MMAP
17# include <unistd.h> 39# include <unistd.h>
18# include <sys/mman.h> 40# include <sys/mman.h>
19# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
… …
36# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
37#endif 59#endif
38 60
39#if CORO_USE_VALGRIND 61#if CORO_USE_VALGRIND
40# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
41# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
42#else
43# define REGISTER_STACK(cctx,start,end)
44#endif 63#endif
45 64
46/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
47#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
48
49#define PERL_VERSION_ATLEAST(a,b,c) \
50 (PERL_REVISION > (a) \
51 || (PERL_REVISION == (a) \
52 && (PERL_VERSION > (b) \
53 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
54
55#if !PERL_VERSION_ATLEAST (5,6,0)
56# ifndef PL_ppaddr
57# define PL_ppaddr ppaddr
58# endif
59# ifndef call_sv
60# define call_sv perl_call_sv
61# endif
62# ifndef get_sv
63# define get_sv perl_get_sv
64# endif
65# ifndef get_cv
66# define get_cv perl_get_cv
67# endif
68# ifndef IS_PADGV
69# define IS_PADGV(v) 0
70# endif
71# ifndef IS_PADCONST
72# define IS_PADCONST(v) 0
73# endif
74#endif
75
76/* 5.8.7 */
77#ifndef SvRV_set
78# define SvRV_set(s,v) SvRV(s) = (v)
79#endif
80
81/* 5.8.8 */
82#ifndef GV_NOTQUAL
83# define GV_NOTQUAL 0
84#endif
85#ifndef newSV
86# define newSV(l) NEWSV(0,l)
87#endif
88 67
89#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
90# undef CORO_STACKGUARD 69# undef CORO_STACKGUARD
91#endif 70#endif
92 71
… …
99# define CORO_PREFER_PERL_FUNCTIONS 0 78# define CORO_PREFER_PERL_FUNCTIONS 0
100#endif 79#endif
101 80
102/* The next macros try to return the current stack pointer, in an as 81/* The next macros try to return the current stack pointer, in an as
103 * portable way as possible. */ 82 * portable way as possible. */
104#define dSTACKLEVEL volatile char stacklevel
105#define STACKLEVEL ((void *)&stacklevel)
106
107#define IN_DESTRUCT (PL_main_cv == Nullcv)
108
109#if __GNUC__ >= 3 83#if __GNUC__ >= 4
110# define attribute(x) __attribute__(x) 84# define dSTACKLEVEL int stacklevel_dummy
111# define BARRIER __asm__ __volatile__ ("" : : : "memory") 85# define STACKLEVEL __builtin_frame_address (0)
112# define expect(expr,value) __builtin_expect ((expr),(value))
113#else 86#else
114# define attribute(x) 87# define dSTACKLEVEL volatile void *stacklevel
115# define BARRIER 88# define STACKLEVEL ((void *)&stacklevel)
116# define expect(expr,value) (expr)
117#endif 89#endif
118 90
119#define expect_false(expr) expect ((expr) != 0, 0) 91#define IN_DESTRUCT PL_dirty
120#define expect_true(expr) expect ((expr) != 0, 1)
121
122#define NOINLINE attribute ((noinline))
123 92
124#include "CoroAPI.h" 93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
125 95
126#ifdef USE_ITHREADS 96#ifdef USE_ITHREADS
127static perl_mutex coro_mutex; 97# if CORO_PTHREAD
128# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 98static void *coro_thx;
129# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 99# endif
130#else
131# define LOCK (void)0
132# define UNLOCK (void)0
133#endif 100#endif
134 101
135#define strpair(const) const, sizeof (const) - 1 102#ifdef __linux
103# include <time.h> /* for timespec */
104# include <syscall.h> /* for SYS_* */
105# ifdef SYS_clock_gettime
106# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
107# define CORO_CLOCK_MONOTONIC 1
108# define CORO_CLOCK_THREAD_CPUTIME_ID 3
109# endif
110#endif
136 111
137/* helper storage struct for Coro::AIO */ 112static double (*nvtime)(); /* so why doesn't it take void? */
138struct io_state 113static void (*u2time)(pTHX_ UV ret[2]);
139{
140 int errorno;
141 I32 laststype;
142 int laststatval;
143 Stat_t statcache;
144};
145 114
115/* we hijack an hopefully unused CV flag for our purposes */
116#define CVf_SLF 0x4000
117static OP *pp_slf (pTHX);
118static void slf_destroy (pTHX_ struct coro *coro);
119
120static U32 cctx_gen;
146static size_t coro_stacksize = CORO_STACKSIZE; 121static size_t cctx_stacksize = CORO_STACKSIZE;
147static struct CoroAPI coroapi; 122static struct CoroAPI coroapi;
148static AV *main_mainstack; /* used to differentiate between $main and others */ 123static AV *main_mainstack; /* used to differentiate between $main and others */
149static JMPENV *main_top_env; 124static JMPENV *main_top_env;
150static HV *coro_state_stash, *coro_stash; 125static HV *coro_state_stash, *coro_stash;
151static SV *coro_mortal; /* will be freed after next transfer */ 126static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
127
128static AV *av_destroy; /* destruction queue */
129static SV *sv_manager; /* the manager coro */
130static SV *sv_idle; /* $Coro::idle */
152 131
153static GV *irsgv; /* $/ */ 132static GV *irsgv; /* $/ */
154static GV *stdoutgv; /* *STDOUT */ 133static GV *stdoutgv; /* *STDOUT */
155 134static SV *rv_diehook;
135static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */ 136static HV *hv_sig; /* %SIG */
157static SV *sv_diehook;
158static SV *sv_warnhook;
159 137
160/* async_pool helper stuff */ 138/* async_pool helper stuff */
161static SV *sv_pool_rss; 139static SV *sv_pool_rss;
162static SV *sv_pool_size; 140static SV *sv_pool_size;
141static SV *sv_async_pool_idle; /* description string */
163static AV *av_async_pool; 142static AV *av_async_pool; /* idle pool */
143static SV *sv_Coro; /* class string */
144static CV *cv_pool_handler;
145
146/* Coro::AnyEvent */
147static SV *sv_activity;
148
149/* enable processtime/realtime profiling */
150static char enable_times;
151typedef U32 coro_ts[2];
152static coro_ts time_real, time_cpu;
153static char times_valid;
164 154
165static struct coro_cctx *cctx_first; 155static struct coro_cctx *cctx_first;
166static int cctx_count, cctx_idle; 156static int cctx_count, cctx_idle;
167 157
168enum { 158enum
159{
169 CC_MAPPED = 0x01, 160 CC_MAPPED = 0x01,
170 CC_NOREUSE = 0x02, /* throw this away after tracing */ 161 CC_NOREUSE = 0x02, /* throw this away after tracing */
171 CC_TRACE = 0x04, 162 CC_TRACE = 0x04,
172 CC_TRACE_SUB = 0x08, /* trace sub calls */ 163 CC_TRACE_SUB = 0x08, /* trace sub calls */
173 CC_TRACE_LINE = 0x10, /* trace each statement */ 164 CC_TRACE_LINE = 0x10, /* trace each statement */
174 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 165 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
175}; 166};
176 167
177/* this is a structure representing a c-level coroutine */ 168/* this is a structure representing a c-level coroutine */
178typedef struct coro_cctx { 169typedef struct coro_cctx
170{
179 struct coro_cctx *next; 171 struct coro_cctx *next;
180 172
181 /* the stack */ 173 /* the stack */
182 void *sptr; 174 void *sptr;
183 size_t ssize; 175 size_t ssize;
… …
186 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 178 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
187 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 179 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
188 JMPENV *top_env; 180 JMPENV *top_env;
189 coro_context cctx; 181 coro_context cctx;
190 182
183 U32 gen;
191#if CORO_USE_VALGRIND 184#if CORO_USE_VALGRIND
192 int valgrind_id; 185 int valgrind_id;
193#endif 186#endif
194 unsigned char flags; 187 unsigned char flags;
195} coro_cctx; 188} coro_cctx;
196 189
190static coro_cctx *cctx_current; /* the currently running cctx */
191
192/*****************************************************************************/
193
194static MGVTBL coro_state_vtbl;
195
197enum { 196enum
197{
198 CF_RUNNING = 0x0001, /* coroutine is running */ 198 CF_RUNNING = 0x0001, /* coroutine is running */
199 CF_READY = 0x0002, /* coroutine is ready */ 199 CF_READY = 0x0002, /* coroutine is ready */
200 CF_NEW = 0x0004, /* has never been switched to */ 200 CF_NEW = 0x0004, /* has never been switched to */
201 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 201 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
202 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
203 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
202}; 204};
203 205
204/* the structure where most of the perl state is stored, overlaid on the cxstack */ 206/* the structure where most of the perl state is stored, overlaid on the cxstack */
205typedef struct { 207typedef struct
208{
206 SV *defsv; 209 SV *defsv;
207 AV *defav; 210 AV *defav;
208 SV *errsv; 211 SV *errsv;
209 SV *irsgv; 212 SV *irsgv;
213 HV *hinthv;
210#define VAR(name,type) type name; 214#define VAR(name,type) type name;
211# include "state.h" 215# include "state.h"
212#undef VAR 216#undef VAR
213} perl_slots; 217} perl_slots;
214 218
219// how many context stack entries do we need for perl_slots
215#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 220#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
216 221
217/* this is a structure representing a perl-level coroutine */ 222/* this is a structure representing a perl-level coroutine */
218struct coro { 223struct coro
224{
219 /* the c coroutine allocated to this perl coroutine, if any */ 225 /* the C coroutine allocated to this perl coroutine, if any */
220 coro_cctx *cctx; 226 coro_cctx *cctx;
221 227
222 /* process data */ 228 /* ready queue */
229 struct coro *next_ready;
230
231 /* state data */
232 struct CoroSLF slf_frame; /* saved slf frame */
223 AV *mainstack; 233 AV *mainstack;
224 perl_slots *slot; /* basically the saved sp */ 234 perl_slots *slot; /* basically the saved sp */
225 235
236 CV *startcv; /* the CV to execute */
226 AV *args; /* data associated with this coroutine (initial args) */ 237 AV *args; /* data associated with this coroutine (initial args) */
227 int refcnt; /* coroutines are refcounted, yes */
228 int flags; /* CF_ flags */ 238 int flags; /* CF_ flags */
229 HV *hv; /* the perl hash associated with this coro, if any */ 239 HV *hv; /* the perl hash associated with this coro, if any */
230 240
231 /* statistics */ 241 /* statistics */
232 int usecount; /* number of transfers to this coro */ 242 int usecount; /* number of transfers to this coro */
233 243
234 /* coro process data */ 244 /* coro process data */
235 int prio; 245 int prio;
236 SV *throw; /* exception to be thrown */ 246 SV *except; /* exception to be thrown */
247 SV *rouse_cb; /* last rouse callback */
248 AV *on_destroy; /* callbacks or coros to notify on destroy */
249 AV *status; /* the exit status list */
237 250
238 /* async_pool */ 251 /* async_pool */
239 SV *saved_deffh; 252 SV *saved_deffh;
253 SV *invoke_cb;
254 AV *invoke_av;
255
256 /* on_enter/on_leave */
257 AV *on_enter;
258 AV *on_leave;
259
260 /* swap_sv */
261 AV *swap_sv;
262
263 /* times */
264 coro_ts t_cpu, t_real;
240 265
241 /* linked list */ 266 /* linked list */
242 struct coro *next, *prev; 267 struct coro *next, *prev;
243}; 268};
244 269
245typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
246typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
247 272
273/* the following variables are effectively part of the perl context */
274/* and get copied between struct coro and these variables */
275/* the main reason we don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
277
248/** Coro ********************************************************************/ 278/** Coro ********************************************************************/
249 279
250#define PRIO_MAX 3 280#define CORO_PRIO_MAX 3
251#define PRIO_HIGH 1 281#define CORO_PRIO_HIGH 1
252#define PRIO_NORMAL 0 282#define CORO_PRIO_NORMAL 0
253#define PRIO_LOW -1 283#define CORO_PRIO_LOW -1
254#define PRIO_IDLE -3 284#define CORO_PRIO_IDLE -3
255#define PRIO_MIN -4 285#define CORO_PRIO_MIN -4
256 286
257/* for Coro.pm */ 287/* for Coro.pm */
258static SV *coro_current; 288static SV *coro_current;
259static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 289static SV *coro_readyhook;
260static int coro_nready; 290static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
291static CV *cv_coro_run;
261static struct coro *coro_first; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** Coro::Select ************************************************************/
296
297static OP *(*coro_old_pp_sselect) (pTHX);
298static SV *coro_select_select;
299
300/* horrible hack, but if it works... */
301static OP *
302coro_pp_sselect (pTHX)
303{
304 dSP;
305 PUSHMARK (SP - 4); /* fake argument list */
306 XPUSHs (coro_select_select);
307 PUTBACK;
308
309 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
310 PL_op->op_flags |= OPf_STACKED;
311 PL_op->op_private = 0;
312 return PL_ppaddr [OP_ENTERSUB](aTHX);
313}
314
315/** time stuff **************************************************************/
316
317#ifdef HAS_GETTIMEOFDAY
318
319ECB_INLINE void
320coro_u2time (pTHX_ UV ret[2])
321{
322 struct timeval tv;
323 gettimeofday (&tv, 0);
324
325 ret [0] = tv.tv_sec;
326 ret [1] = tv.tv_usec;
327}
328
329ECB_INLINE double
330coro_nvtime ()
331{
332 struct timeval tv;
333 gettimeofday (&tv, 0);
334
335 return tv.tv_sec + tv.tv_usec * 1e-6;
336}
337
338ECB_INLINE void
339time_init (pTHX)
340{
341 nvtime = coro_nvtime;
342 u2time = coro_u2time;
343}
344
345#else
346
347ECB_INLINE void
348time_init (pTHX)
349{
350 SV **svp;
351
352 require_pv ("Time/HiRes.pm");
353
354 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
355
356 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
357 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
358
359 nvtime = INT2PTR (double (*)(), SvIV (*svp));
360
361 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
362 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
363}
364
365#endif
262 366
263/** lowlevel stuff **********************************************************/ 367/** lowlevel stuff **********************************************************/
264 368
265static SV * 369static SV * ecb_noinline
266coro_get_sv (const char *name, int create) 370coro_get_sv (pTHX_ const char *name, int create)
267{ 371{
268#if PERL_VERSION_ATLEAST (5,9,0) 372#if PERL_VERSION_ATLEAST (5,10,0)
269 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 373 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
270 get_sv (name, create); 374 get_sv (name, create);
271#endif 375#endif
272 return get_sv (name, create); 376 return get_sv (name, create);
273} 377}
274 378
275static AV * 379static AV * ecb_noinline
276coro_get_av (const char *name, int create) 380coro_get_av (pTHX_ const char *name, int create)
277{ 381{
278#if PERL_VERSION_ATLEAST (5,9,0) 382#if PERL_VERSION_ATLEAST (5,10,0)
279 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 383 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
280 get_av (name, create); 384 get_av (name, create);
281#endif 385#endif
282 return get_av (name, create); 386 return get_av (name, create);
283} 387}
284 388
285static HV * 389static HV * ecb_noinline
286coro_get_hv (const char *name, int create) 390coro_get_hv (pTHX_ const char *name, int create)
287{ 391{
288#if PERL_VERSION_ATLEAST (5,9,0) 392#if PERL_VERSION_ATLEAST (5,10,0)
289 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 393 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
290 get_hv (name, create); 394 get_hv (name, create);
291#endif 395#endif
292 return get_hv (name, create); 396 return get_hv (name, create);
293} 397}
294 398
295static AV * 399ECB_INLINE void
400coro_times_update ()
401{
402#ifdef coro_clock_gettime
403 struct timespec ts;
404
405 ts.tv_sec = ts.tv_nsec = 0;
406 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
407 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
408
409 ts.tv_sec = ts.tv_nsec = 0;
410 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
411 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
412#else
413 dTHX;
414 UV tv[2];
415
416 u2time (aTHX_ tv);
417 time_real [0] = tv [0];
418 time_real [1] = tv [1] * 1000;
419#endif
420}
421
422ECB_INLINE void
423coro_times_add (struct coro *c)
424{
425 c->t_real [1] += time_real [1];
426 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
427 c->t_real [0] += time_real [0];
428
429 c->t_cpu [1] += time_cpu [1];
430 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
431 c->t_cpu [0] += time_cpu [0];
432}
433
434ECB_INLINE void
435coro_times_sub (struct coro *c)
436{
437 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
438 c->t_real [1] -= time_real [1];
439 c->t_real [0] -= time_real [0];
440
441 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
442 c->t_cpu [1] -= time_cpu [1];
443 c->t_cpu [0] -= time_cpu [0];
444}
445
446/*****************************************************************************/
447/* magic glue */
448
449#define CORO_MAGIC_type_cv 26
450#define CORO_MAGIC_type_state PERL_MAGIC_ext
451
452#define CORO_MAGIC_NN(sv, type) \
453 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
454 ? SvMAGIC (sv) \
455 : mg_find (sv, type))
456
457#define CORO_MAGIC(sv, type) \
458 (ecb_expect_true (SvMAGIC (sv)) \
459 ? CORO_MAGIC_NN (sv, type) \
460 : 0)
461
462#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
463#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
464
465ECB_INLINE MAGIC *
466SvSTATEhv_p (pTHX_ SV *coro)
467{
468 MAGIC *mg;
469
470 if (ecb_expect_true (
471 SvTYPE (coro) == SVt_PVHV
472 && (mg = CORO_MAGIC_state (coro))
473 && mg->mg_virtual == &coro_state_vtbl
474 ))
475 return mg;
476
477 return 0;
478}
479
480ECB_INLINE struct coro *
481SvSTATE_ (pTHX_ SV *coro)
482{
483 MAGIC *mg;
484
485 if (SvROK (coro))
486 coro = SvRV (coro);
487
488 mg = SvSTATEhv_p (aTHX_ coro);
489 if (!mg)
490 croak ("Coro::State object required");
491
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504ECB_INLINE AV *
296coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
297{ 506{
298 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
299 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
300 509
301 newpadlist = newAV (); 510 newpadlist = newAV ();
302 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
303#if PERL_VERSION_ATLEAST (5,9,0) 512#if PERL_VERSION_ATLEAST (5,10,0)
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
305#else 514#else
306 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
307#endif 516#endif
308 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
309 --AvFILLp (padlist); 518 --AvFILLp (padlist);
310 519
311 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
312 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
313 522
314 return newpadlist; 523 return newpadlist;
315} 524}
316 525
317static void 526ECB_INLINE void
318free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
319{ 528{
320 /* may be during global destruction */ 529 /* may be during global destruction */
321 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
322 { 531 {
323 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
324 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
325 { 535 {
326 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
327 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
328 { 538 I32 j = AvFILLp (av);
329 SV *sv; 539
330 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
331 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
332
333 SvREFCNT_dec (*svp);
334 }
335 } 545 }
336 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
337 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
338 } 551 }
339} 552}
340 553
341static int 554static int
342coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
343{ 556{
344 AV *padlist; 557 AV *padlist;
345 AV *av = (AV *)mg->mg_obj; 558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
346 563
347 /* casting is fun. */ 564 /* casting is fun. */
348 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
349 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
350 567
351 SvREFCNT_dec (av); 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
352 569
353 return 0; 570 return 0;
354} 571}
355 572
356#define PERL_MAGIC_coro PERL_MAGIC_ext 573static MGVTBL coro_cv_vtbl = {
357 574 0, 0, 0, 0,
358static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 575 coro_cv_free
359 576};
360#define CORO_MAGIC(cv) \
361 SvMAGIC (cv) \
362 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
363 ? SvMAGIC (cv) \
364 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
365 : 0
366
367static struct coro *
368SvSTATE_ (pTHX_ SV *coro)
369{
370 HV *stash;
371 MAGIC *mg;
372
373 if (SvROK (coro))
374 coro = SvRV (coro);
375
376 if (expect_false (SvTYPE (coro) != SVt_PVHV))
377 croak ("Coro::State object required");
378
379 stash = SvSTASH (coro);
380 if (expect_false (stash != coro_stash && stash != coro_state_stash))
381 {
382 /* very slow, but rare, check */
383 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
384 croak ("Coro::State object required");
385 }
386
387 mg = CORO_MAGIC (coro);
388 return (struct coro *)mg->mg_ptr;
389}
390
391#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
392 577
393/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
394static void 579ECB_INLINE void
395get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
396{ 581{
397 MAGIC *mg = CORO_MAGIC (cv); 582 MAGIC *mg = CORO_MAGIC_cv (cv);
398 AV *av; 583 AV *av;
399 584
400 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 585 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
401 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
402 else 587 else
403 { 588 {
404#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
405 /* this is probably cleaner, but also slower? */ 590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
406 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
407 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
408 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
409 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
410#else 596#else
411 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
412#endif 598#endif
413 } 599 }
414} 600}
415 601
416static void 602ECB_INLINE void
417put_padlist (pTHX_ CV *cv) 603put_padlist (pTHX_ CV *cv)
418{ 604{
419 MAGIC *mg = CORO_MAGIC (cv); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
420 AV *av; 606 AV *av;
421 607
422 if (expect_false (!mg)) 608 if (ecb_expect_false (!mg))
423 { 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
424 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
425 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
426 mg->mg_virtual = &vtbl_coro;
427 mg->mg_obj = (SV *)newAV ();
428 }
429 610
430 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
431 612
432 if (expect_false (AvFILLp (av) >= AvMAX (av))) 613 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
433 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
434 615
435 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
436} 617}
437 618
438/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
628 {
629 SV *a = AvARRAY (c->swap_sv)[i++];
630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
648 {
649 /* swap sv_u */
650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
651
652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
663 }
664#endif
665 }
666}
667
668#define SWAP_SVS(coro) \
669 if (ecb_expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
671
672static void
673on_enterleave_call (pTHX_ SV *cb);
439 674
440static void 675static void
441load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
442{ 677{
443 perl_slots *slot = c->slot; 678 perl_slots *slot = c->slot;
444 c->slot = 0; 679 c->slot = 0;
445 680
446 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
447 682
448 GvSV (PL_defgv) = slot->defsv; 683 GvSV (PL_defgv) = slot->defsv;
449 GvAV (PL_defgv) = slot->defav; 684 GvAV (PL_defgv) = slot->defav;
450 GvSV (PL_errgv) = slot->errsv; 685 GvSV (PL_errgv) = slot->errsv;
451 GvSV (irsgv) = slot->irsgv; 686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
452 688
453 #define VAR(name,type) PL_ ## name = slot->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
454 # include "state.h" 690 # include "state.h"
455 #undef VAR 691 #undef VAR
456 692
457 /*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
458 /*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
459
460 { 693 {
461 dSP; 694 dSP;
462 695
463 CV *cv; 696 CV *cv;
464 697
465 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
466 while (expect_true (cv = (CV *)POPs)) 699 while (ecb_expect_true (cv = (CV *)POPs))
467 { 700 {
468 put_padlist (aTHX_ cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
469 CvDEPTH (cv) = PTR2IV (POPs); 702 CvDEPTH (cv) = PTR2IV (POPs);
470 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
471 } 704 }
472 705
473 PUTBACK; 706 PUTBACK;
474 } 707 }
708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (ecb_expect_false (enable_times))
713 {
714 if (ecb_expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (ecb_expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
475} 729}
476 730
477static void 731static void
478save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
479{ 733{
734 SWAP_SVS (c);
735
736 if (ecb_expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (ecb_expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
480 { 755 {
481 dSP; 756 dSP;
482 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
483 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
484 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
490 765
491 XPUSHs (Nullsv); 766 XPUSHs (Nullsv);
492 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
493 for (;;) 768 for (;;)
494 { 769 {
495 while (expect_true (cxix >= 0)) 770 while (ecb_expect_true (cxix >= 0))
496 { 771 {
497 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
498 773
499 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 774 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
500 { 775 {
501 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
502 777
503 if (expect_true (CvDEPTH (cv))) 778 if (ecb_expect_true (CvDEPTH (cv)))
504 { 779 {
505 EXTEND (SP, 3); 780 EXTEND (SP, 3);
506 PUSHs ((SV *)CvPADLIST (cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
507 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
508 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
509 784
510 CvDEPTH (cv) = 0; 785 CvDEPTH (cv) = 0;
511 get_padlist (aTHX_ cv); 786 get_padlist (aTHX_ cv);
512 } 787 }
513 } 788 }
514 } 789 }
515 790
516 if (expect_true (top_si->si_type == PERLSI_MAIN)) 791 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
517 break; 792 break;
518 793
519 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
520 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
521 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
… …
523 798
524 PUTBACK; 799 PUTBACK;
525 } 800 }
526 801
527 /* allocate some space on the context stack for our purposes */ 802 /* allocate some space on the context stack for our purposes */
528 /* we manually unroll here, as usually 2 slots is enough */ 803 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
529 if (SLOT_COUNT >= 1) CXINC;
530 if (SLOT_COUNT >= 2) CXINC;
531 if (SLOT_COUNT >= 3) CXINC;
532 { 804 {
533 int i; 805 unsigned int i;
806
534 for (i = 3; i < SLOT_COUNT; ++i) 807 for (i = 0; i < SLOT_COUNT; ++i)
535 CXINC; 808 CXINC;
536 } 809
537 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 810 cxstack_ix -= SLOT_COUNT; /* undo allocation */
811 }
538 812
539 c->mainstack = PL_mainstack; 813 c->mainstack = PL_mainstack;
540 814
541 { 815 {
542 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 816 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
543 817
544 slot->defav = GvAV (PL_defgv); 818 slot->defav = GvAV (PL_defgv);
545 slot->defsv = DEFSV; 819 slot->defsv = DEFSV;
546 slot->errsv = ERRSV; 820 slot->errsv = ERRSV;
547 slot->irsgv = GvSV (irsgv); 821 slot->irsgv = GvSV (irsgv);
822 slot->hinthv = GvHV (PL_hintgv);
548 823
549 #define VAR(name,type) slot->name = PL_ ## name; 824 #define VAR(name,type) slot->name = PL_ ## name;
550 # include "state.h" 825 # include "state.h"
551 #undef VAR 826 #undef VAR
552 } 827 }
553} 828}
554 829
555/* 830/*
556 * allocate various perl stacks. This is an exact copy 831 * allocate various perl stacks. This is almost an exact copy
557 * of perl.c:init_stacks, except that it uses less memory 832 * of perl.c:init_stacks, except that it uses less memory
558 * on the (sometimes correct) assumption that coroutines do 833 * on the (sometimes correct) assumption that coroutines do
559 * not usually need a lot of stackspace. 834 * not usually need a lot of stackspace.
560 */ 835 */
561#if CORO_PREFER_PERL_FUNCTIONS 836#if CORO_PREFER_PERL_FUNCTIONS
562# define coro_init_stacks init_stacks 837# define coro_init_stacks(thx) init_stacks ()
563#else 838#else
564static void 839static void
565coro_init_stacks (pTHX) 840coro_init_stacks (pTHX)
566{ 841{
567 PL_curstackinfo = new_stackinfo(32, 8); 842 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
568 PL_curstackinfo->si_type = PERLSI_MAIN; 843 PL_curstackinfo->si_type = PERLSI_MAIN;
569 PL_curstack = PL_curstackinfo->si_stack; 844 PL_curstack = PL_curstackinfo->si_stack;
570 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 845 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
571 846
572 PL_stack_base = AvARRAY(PL_curstack); 847 PL_stack_base = AvARRAY(PL_curstack);
… …
592 867
593 New(54,PL_savestack,24,ANY); 868 New(54,PL_savestack,24,ANY);
594 PL_savestack_ix = 0; 869 PL_savestack_ix = 0;
595 PL_savestack_max = 24; 870 PL_savestack_max = 24;
596 871
597#if !PERL_VERSION_ATLEAST (5,9,0) 872#if !PERL_VERSION_ATLEAST (5,10,0)
598 New(54,PL_retstack,4,OP*); 873 New(54,PL_retstack,4,OP*);
599 PL_retstack_ix = 0; 874 PL_retstack_ix = 0;
600 PL_retstack_max = 4; 875 PL_retstack_max = 4;
601#endif 876#endif
602} 877}
… …
604 879
605/* 880/*
606 * destroy the stacks, the callchain etc... 881 * destroy the stacks, the callchain etc...
607 */ 882 */
608static void 883static void
609coro_destroy_stacks (pTHX) 884coro_destruct_stacks (pTHX)
610{ 885{
611 while (PL_curstackinfo->si_next) 886 while (PL_curstackinfo->si_next)
612 PL_curstackinfo = PL_curstackinfo->si_next; 887 PL_curstackinfo = PL_curstackinfo->si_next;
613 888
614 while (PL_curstackinfo) 889 while (PL_curstackinfo)
… …
625 900
626 Safefree (PL_tmps_stack); 901 Safefree (PL_tmps_stack);
627 Safefree (PL_markstack); 902 Safefree (PL_markstack);
628 Safefree (PL_scopestack); 903 Safefree (PL_scopestack);
629 Safefree (PL_savestack); 904 Safefree (PL_savestack);
630#if !PERL_VERSION_ATLEAST (5,9,0) 905#if !PERL_VERSION_ATLEAST (5,10,0)
631 Safefree (PL_retstack); 906 Safefree (PL_retstack);
632#endif 907#endif
633} 908}
634 909
910#define CORO_RSS \
911 rss += sizeof (SYM (curstackinfo)); \
912 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
913 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
914 rss += SYM (tmps_max) * sizeof (SV *); \
915 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
916 rss += SYM (scopestack_max) * sizeof (I32); \
917 rss += SYM (savestack_max) * sizeof (ANY);
918
635static size_t 919static size_t
636coro_rss (pTHX_ struct coro *coro) 920coro_rss (pTHX_ struct coro *coro)
637{ 921{
638 size_t rss = sizeof (*coro); 922 size_t rss = sizeof (*coro);
639 923
640 if (coro->mainstack) 924 if (coro->mainstack)
641 { 925 {
642 perl_slots tmp_slot;
643 perl_slots *slot;
644
645 if (coro->flags & CF_RUNNING) 926 if (coro->flags & CF_RUNNING)
646 { 927 {
647 slot = &tmp_slot; 928 #define SYM(sym) PL_ ## sym
648 929 CORO_RSS;
649 #define VAR(name,type) slot->name = PL_ ## name;
650 # include "state.h"
651 #undef VAR 930 #undef SYM
652 } 931 }
653 else 932 else
654 slot = coro->slot; 933 {
934 #define SYM(sym) coro->slot->sym
935 CORO_RSS;
936 #undef SYM
937 }
938 }
655 939
656 rss += sizeof (slot->curstackinfo); 940 return rss;
657 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 941}
658 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
659 rss += slot->tmps_max * sizeof (SV *);
660 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
661 rss += slot->scopestack_max * sizeof (I32);
662 rss += slot->savestack_max * sizeof (ANY);
663 942
664#if !PERL_VERSION_ATLEAST (5,9,0) 943/** coroutine stack handling ************************************************/
665 rss += slot->retstack_max * sizeof (OP *); 944
945static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
948
949/* apparently < 5.8.8 */
950#ifndef MgPV_nolen_const
951#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
952 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
953 (const char*)(mg)->mg_ptr)
666#endif 954#endif
955
956/*
957 * This overrides the default magic get method of %SIG elements.
958 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
959 * and instead of trying to save and restore the hash elements (extremely slow),
960 * we just provide our own readback here.
961 */
962static int ecb_cold
963coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
964{
965 const char *s = MgPV_nolen_const (mg);
966
967 if (*s == '_')
667 } 968 {
969 SV **svp = 0;
668 970
971 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
972 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
973
974 if (svp)
975 {
976 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
977 return 0;
978 }
979 }
980
981 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
982}
983
984static int ecb_cold
985coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
986{
987 const char *s = MgPV_nolen_const (mg);
988
989 if (*s == '_')
990 {
991 SV **svp = 0;
992
993 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
994 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
995
996 if (svp)
997 {
998 SV *old = *svp;
999 *svp = 0;
1000 SvREFCNT_dec (old);
1001 return 0;
1002 }
1003 }
1004
1005 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1006}
1007
1008static int ecb_cold
1009coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1010{
1011 const char *s = MgPV_nolen_const (mg);
1012
1013 if (*s == '_')
1014 {
1015 SV **svp = 0;
1016
1017 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1018 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1019
1020 if (svp)
1021 {
1022 SV *old = *svp;
1023 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1024 SvREFCNT_dec (old);
1025 return 0;
1026 }
1027 }
1028
1029 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1030}
1031
1032static void
1033prepare_nop (pTHX_ struct coro_transfer_args *ta)
1034{
1035 /* kind of mega-hacky, but works */
1036 ta->next = ta->prev = (struct coro *)ta;
1037}
1038
1039static int
1040slf_check_nop (pTHX_ struct CoroSLF *frame)
1041{
669 return rss; 1042 return 0;
670} 1043}
671 1044
672/** coroutine stack handling ************************************************/
673
674static void 1045static int
1046slf_check_repeat (pTHX_ struct CoroSLF *frame)
1047{
1048 return 1;
1049}
1050
1051static UNOP init_perl_op;
1052
1053ecb_noinline static void /* noinline to keep it out of the transfer fast path */
675coro_setup (pTHX_ struct coro *coro) 1054init_perl (pTHX_ struct coro *coro)
676{ 1055{
677 /* 1056 /*
678 * emulate part of the perl startup here. 1057 * emulate part of the perl startup here.
679 */ 1058 */
680 coro_init_stacks (aTHX); 1059 coro_init_stacks (aTHX);
681 1060
682 PL_runops = RUNOPS_DEFAULT; 1061 PL_runops = RUNOPS_DEFAULT;
683 PL_curcop = &PL_compiling; 1062 PL_curcop = &PL_compiling;
684 PL_in_eval = EVAL_NULL; 1063 PL_in_eval = EVAL_NULL;
685 PL_comppad = 0; 1064 PL_comppad = 0;
1065 PL_comppad_name = 0;
1066 PL_comppad_name_fill = 0;
1067 PL_comppad_name_floor = 0;
686 PL_curpm = 0; 1068 PL_curpm = 0;
687 PL_curpad = 0; 1069 PL_curpad = 0;
688 PL_localizing = 0; 1070 PL_localizing = 0;
689 PL_dirty = 0;
690 PL_restartop = 0; 1071 PL_restartop = 0;
691 PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0); 1072#if PERL_VERSION_ATLEAST (5,10,0)
692 PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0); 1073 PL_parser = 0;
1074#endif
1075 PL_hints = 0;
1076
1077 /* recreate the die/warn hooks */
1078 PL_diehook = SvREFCNT_inc (rv_diehook);
1079 PL_warnhook = SvREFCNT_inc (rv_warnhook);
693 1080
694 GvSV (PL_defgv) = newSV (0); 1081 GvSV (PL_defgv) = newSV (0);
695 GvAV (PL_defgv) = coro->args; coro->args = 0; 1082 GvAV (PL_defgv) = coro->args; coro->args = 0;
696 GvSV (PL_errgv) = newSV (0); 1083 GvSV (PL_errgv) = newSV (0);
697 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1084 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1085 GvHV (PL_hintgv) = 0;
698 PL_rs = newSVsv (GvSV (irsgv)); 1086 PL_rs = newSVsv (GvSV (irsgv));
699 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1087 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
700 1088
701 { 1089 {
702 dSP; 1090 dSP;
703 LOGOP myop; 1091 UNOP myop;
704 1092
705 Zero (&myop, 1, LOGOP); 1093 Zero (&myop, 1, UNOP);
706 myop.op_next = Nullop; 1094 myop.op_next = Nullop;
1095 myop.op_type = OP_ENTERSUB;
707 myop.op_flags = OPf_WANT_VOID; 1096 myop.op_flags = OPf_WANT_VOID;
708 1097
709 PUSHMARK (SP); 1098 PUSHMARK (SP);
710 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1099 PUSHs ((SV *)coro->startcv);
711 PUTBACK; 1100 PUTBACK;
712 PL_op = (OP *)&myop; 1101 PL_op = (OP *)&myop;
713 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1102 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
714 SPAGAIN;
715 } 1103 }
716 1104
717 ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */ 1105 /* this newly created coroutine might be run on an existing cctx which most
718} 1106 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1107 */
1108 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1109 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1110 slf_frame.destroy = 0;
719 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (ecb_expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
720static void 1132static void
721coro_destroy (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
722{ 1134{
723 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
724 { 1136 {
725 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
726 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
734 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
735 1147
736 /* unwind main stack */ 1148 /* unwind main stack */
737 dounwind (-1); 1149 dounwind (-1);
738 } 1150 }
1151}
739 1152
740 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
741 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
742 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
743 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
744 SvREFCNT_dec (PL_rs);
745 SvREFCNT_dec (GvSV (irsgv));
746 1157
747 SvREFCNT_dec (PL_diehook);
748 SvREFCNT_dec (PL_warnhook);
749 1158 {
1159 SV *old_current = SvRV (coro_current);
1160 struct coro *current = SvSTATE (old_current);
1161
1162 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1163
1164 save_perl (aTHX_ current);
1165
1166 /* this will cause transfer_check to croak on block*/
1167 SvRV_set (coro_current, (SV *)coro->hv);
1168
1169 load_perl (aTHX_ coro);
1170
1171 coro_unwind_stacks (aTHX);
1172
1173 /* restore swapped sv's */
1174 SWAP_SVS (coro);
1175
1176 coro_destruct_stacks (aTHX);
1177
1178 // now save some sv's to be free'd later
1179 svf [0] = GvSV (PL_defgv);
1180 svf [1] = (SV *)GvAV (PL_defgv);
1181 svf [2] = GvSV (PL_errgv);
1182 svf [3] = (SV *)PL_defoutgv;
1183 svf [4] = PL_rs;
1184 svf [5] = GvSV (irsgv);
1185 svf [6] = (SV *)GvHV (PL_hintgv);
1186 svf [7] = PL_diehook;
1187 svf [8] = PL_warnhook;
1188 assert (9 == sizeof (svf) / sizeof (*svf));
1189
1190 SvRV_set (coro_current, old_current);
1191
1192 load_perl (aTHX_ current);
1193 }
1194
1195 {
1196 unsigned int i;
1197
1198 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1199 SvREFCNT_dec (svf [i]);
1200
750 SvREFCNT_dec (coro->saved_deffh); 1201 SvREFCNT_dec (coro->saved_deffh);
751 SvREFCNT_dec (coro->throw); 1202 SvREFCNT_dec (coro->rouse_cb);
752 1203 SvREFCNT_dec (coro->invoke_cb);
753 coro_destroy_stacks (aTHX); 1204 SvREFCNT_dec (coro->invoke_av);
1205 }
754} 1206}
755 1207
756static void 1208ECB_INLINE void
757free_coro_mortal (pTHX) 1209free_coro_mortal (pTHX)
758{ 1210{
759 if (expect_true (coro_mortal)) 1211 if (ecb_expect_true (coro_mortal))
760 { 1212 {
761 SvREFCNT_dec (coro_mortal); 1213 SvREFCNT_dec ((SV *)coro_mortal);
762 coro_mortal = 0; 1214 coro_mortal = 0;
763 } 1215 }
764} 1216}
765 1217
766static int 1218static int
767runops_trace (pTHX) 1219runops_trace (pTHX)
768{ 1220{
769 COP *oldcop = 0; 1221 COP *oldcop = 0;
770 int oldcxix = -2; 1222 int oldcxix = -2;
771 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
772 coro_cctx *cctx = coro->cctx;
773 1223
774 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1224 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
775 { 1225 {
776 PERL_ASYNC_CHECK (); 1226 PERL_ASYNC_CHECK ();
777 1227
778 if (cctx->flags & CC_TRACE_ALL) 1228 if (cctx_current->flags & CC_TRACE_ALL)
779 { 1229 {
780 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1230 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
781 { 1231 {
782 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1232 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
783 SV **bot, **top; 1233 SV **bot, **top;
784 AV *av = newAV (); /* return values */ 1234 AV *av = newAV (); /* return values */
785 SV **cb; 1235 SV **cb;
… …
795 : cx->blk_gimme == G_SCALAR ? bot + 1 1245 : cx->blk_gimme == G_SCALAR ? bot + 1
796 : bot; 1246 : bot;
797 1247
798 av_extend (av, top - bot); 1248 av_extend (av, top - bot);
799 while (bot < top) 1249 while (bot < top)
800 av_push (av, SvREFCNT_inc (*bot++)); 1250 av_push (av, SvREFCNT_inc_NN (*bot++));
801 1251
802 PL_runops = RUNOPS_DEFAULT; 1252 PL_runops = RUNOPS_DEFAULT;
803 ENTER; 1253 ENTER;
804 SAVETMPS; 1254 SAVETMPS;
805 EXTEND (SP, 3); 1255 EXTEND (SP, 3);
806 PUSHMARK (SP); 1256 PUSHMARK (SP);
807 PUSHs (&PL_sv_no); 1257 PUSHs (&PL_sv_no);
808 PUSHs (fullname); 1258 PUSHs (fullname);
809 PUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 1259 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
810 PUTBACK; 1260 PUTBACK;
811 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0); 1261 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
812 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1262 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
813 SPAGAIN; 1263 SPAGAIN;
814 FREETMPS; 1264 FREETMPS;
815 LEAVE; 1265 LEAVE;
816 PL_runops = runops_trace; 1266 PL_runops = runops_trace;
… …
822 1272
823 if (PL_curcop != &PL_compiling) 1273 if (PL_curcop != &PL_compiling)
824 { 1274 {
825 SV **cb; 1275 SV **cb;
826 1276
827 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1277 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
828 { 1278 {
829 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1279 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
830 1280
831 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1281 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
832 { 1282 {
833 runops_proc_t old_runops = PL_runops;
834 dSP; 1283 dSP;
835 GV *gv = CvGV (cx->blk_sub.cv); 1284 GV *gv = CvGV (cx->blk_sub.cv);
836 SV *fullname = sv_2mortal (newSV (0)); 1285 SV *fullname = sv_2mortal (newSV (0));
837 1286
838 if (isGV (gv)) 1287 if (isGV (gv))
… …
843 SAVETMPS; 1292 SAVETMPS;
844 EXTEND (SP, 3); 1293 EXTEND (SP, 3);
845 PUSHMARK (SP); 1294 PUSHMARK (SP);
846 PUSHs (&PL_sv_yes); 1295 PUSHs (&PL_sv_yes);
847 PUSHs (fullname); 1296 PUSHs (fullname);
848 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1297 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
849 PUTBACK; 1298 PUTBACK;
850 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0); 1299 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
851 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1300 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
852 SPAGAIN; 1301 SPAGAIN;
853 FREETMPS; 1302 FREETMPS;
854 LEAVE; 1303 LEAVE;
855 PL_runops = runops_trace; 1304 PL_runops = runops_trace;
856 } 1305 }
857 1306
858 oldcxix = cxstack_ix; 1307 oldcxix = cxstack_ix;
859 } 1308 }
860 1309
861 if (cctx->flags & CC_TRACE_LINE) 1310 if (cctx_current->flags & CC_TRACE_LINE)
862 { 1311 {
863 dSP; 1312 dSP;
864 1313
865 PL_runops = RUNOPS_DEFAULT; 1314 PL_runops = RUNOPS_DEFAULT;
866 ENTER; 1315 ENTER;
… …
869 PL_runops = RUNOPS_DEFAULT; 1318 PL_runops = RUNOPS_DEFAULT;
870 PUSHMARK (SP); 1319 PUSHMARK (SP);
871 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0))); 1320 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
872 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop)))); 1321 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
873 PUTBACK; 1322 PUTBACK;
874 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0); 1323 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
875 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1324 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
876 SPAGAIN; 1325 SPAGAIN;
877 FREETMPS; 1326 FREETMPS;
878 LEAVE; 1327 LEAVE;
879 PL_runops = runops_trace; 1328 PL_runops = runops_trace;
… …
885 1334
886 TAINT_NOT; 1335 TAINT_NOT;
887 return 0; 1336 return 0;
888} 1337}
889 1338
890/* inject a fake call to Coro::State::_cctx_init into the execution */ 1339static struct CoroSLF cctx_ssl_frame;
891/* _cctx_init should be careful, as it could be called at almost any time */
892/* during execution of a perl program */
893static void NOINLINE
894cctx_prepare (pTHX_ coro_cctx *cctx)
895{
896 dSP;
897 LOGOP myop;
898 1340
1341static void
1342slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1343{
1344 ta->prev = 0;
1345}
1346
1347static int
1348slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1349{
1350 *frame = cctx_ssl_frame;
1351
1352 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1353}
1354
1355/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1356static void ecb_noinline
1357cctx_prepare (pTHX)
1358{
899 PL_top_env = &PL_start_env; 1359 PL_top_env = &PL_start_env;
900 1360
901 if (cctx->flags & CC_TRACE) 1361 if (cctx_current->flags & CC_TRACE)
902 PL_runops = runops_trace; 1362 PL_runops = runops_trace;
903 1363
904 Zero (&myop, 1, LOGOP); 1364 /* we already must be executing an SLF op, there is no other valid way
905 myop.op_next = PL_op; 1365 * that can lead to creation of a new cctx */
906 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1366 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1367 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
907 1368
908 PUSHMARK (SP); 1369 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
909 EXTEND (SP, 2); 1370 cctx_ssl_frame = slf_frame;
910 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1371
911 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1372 slf_frame.prepare = slf_prepare_set_stacklevel;
912 PUTBACK; 1373 slf_frame.check = slf_check_set_stacklevel;
913 PL_op = (OP *)&myop; 1374}
914 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1375
915 SPAGAIN; 1376/* the tail of transfer: execute stuff we can only do after a transfer */
1377ECB_INLINE void
1378transfer_tail (pTHX)
1379{
1380 free_coro_mortal (aTHX);
916} 1381}
917 1382
918/* 1383/*
919 * this is a _very_ stripped down perl interpreter ;) 1384 * this is a _very_ stripped down perl interpreter ;)
920 */ 1385 */
921static void 1386static void
922cctx_run (void *arg) 1387cctx_run (void *arg)
923{ 1388{
1389#ifdef USE_ITHREADS
1390# if CORO_PTHREAD
1391 PERL_SET_CONTEXT (coro_thx);
1392# endif
1393#endif
1394 {
924 dTHX; 1395 dTHX;
925 1396
926 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1397 /* normally we would need to skip the entersub here */
927 UNLOCK; 1398 /* not doing so will re-execute it, which is exactly what we want */
928
929 /* we now skip the entersub that lead to transfer() */
930 PL_op = PL_op->op_next; 1399 /* PL_nop = PL_nop->op_next */
931 1400
932 /* inject a fake subroutine call to cctx_init */ 1401 /* inject a fake subroutine call to cctx_init */
933 cctx_prepare (aTHX_ (coro_cctx *)arg); 1402 cctx_prepare (aTHX);
934 1403
1404 /* cctx_run is the alternative tail of transfer() */
1405 transfer_tail (aTHX);
1406
935 /* somebody or something will hit me for both perl_run and PL_restartop */ 1407 /* somebody or something will hit me for both perl_run and PL_restartop */
936 PL_restartop = PL_op; 1408 PL_restartop = PL_op;
937 perl_run (PL_curinterp); 1409 perl_run (PL_curinterp);
938
939 /* 1410 /*
1411 * Unfortunately, there is no way to get at the return values of the
1412 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1413 * runtime errors here, as this is just a random interpreter, not a thread.
1414 */
1415
1416 /*
940 * If perl-run returns we assume exit() was being called or the coro 1417 * If perl-run returns we assume exit() was being called or the coro
941 * fell off the end, which seems to be the only valid (non-bug) 1418 * fell off the end, which seems to be the only valid (non-bug)
942 * reason for perl_run to return. We try to exit by jumping to the 1419 * reason for perl_run to return. We try to exit by jumping to the
943 * bootstrap-time "top" top_env, as we cannot restore the "main" 1420 * bootstrap-time "top" top_env, as we cannot restore the "main"
944 * coroutine as Coro has no such concept 1421 * coroutine as Coro has no such concept.
1422 * This actually isn't valid with the pthread backend, but OSes requiring
1423 * that backend are too broken to do it in a standards-compliant way.
945 */ 1424 */
946 PL_top_env = main_top_env; 1425 PL_top_env = main_top_env;
947 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1426 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1427 }
948} 1428}
949 1429
950static coro_cctx * 1430static coro_cctx *
951cctx_new () 1431cctx_new ()
952{ 1432{
953 coro_cctx *cctx; 1433 coro_cctx *cctx;
1434
1435 ++cctx_count;
1436 New (0, cctx, 1, coro_cctx);
1437
1438 cctx->gen = cctx_gen;
1439 cctx->flags = 0;
1440 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1441
1442 return cctx;
1443}
1444
1445/* create a new cctx only suitable as source */
1446static coro_cctx *
1447cctx_new_empty ()
1448{
1449 coro_cctx *cctx = cctx_new ();
1450
1451 cctx->sptr = 0;
1452 coro_create (&cctx->cctx, 0, 0, 0, 0);
1453
1454 return cctx;
1455}
1456
1457/* create a new cctx suitable as destination/running a perl interpreter */
1458static coro_cctx *
1459cctx_new_run ()
1460{
1461 coro_cctx *cctx = cctx_new ();
954 void *stack_start; 1462 void *stack_start;
955 size_t stack_size; 1463 size_t stack_size;
956 1464
957 ++cctx_count;
958
959 Newz (0, cctx, 1, coro_cctx);
960
961#if HAVE_MMAP 1465#if HAVE_MMAP
962 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1466 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
963 /* mmap supposedly does allocate-on-write for us */ 1467 /* mmap supposedly does allocate-on-write for us */
964 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1468 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
965 1469
966 if (cctx->sptr != (void *)-1) 1470 if (cctx->sptr != (void *)-1)
967 { 1471 {
968# if CORO_STACKGUARD 1472 #if CORO_STACKGUARD
969 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1473 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
970# endif 1474 #endif
971 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1475 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
972 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1476 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
973 cctx->flags |= CC_MAPPED; 1477 cctx->flags |= CC_MAPPED;
974 } 1478 }
975 else 1479 else
976#endif 1480#endif
977 { 1481 {
978 cctx->ssize = coro_stacksize * (long)sizeof (long); 1482 cctx->ssize = cctx_stacksize * (long)sizeof (long);
979 New (0, cctx->sptr, coro_stacksize, long); 1483 New (0, cctx->sptr, cctx_stacksize, long);
980 1484
981 if (!cctx->sptr) 1485 if (!cctx->sptr)
982 { 1486 {
983 perror ("FATAL: unable to allocate stack for coroutine"); 1487 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
984 _exit (EXIT_FAILURE); 1488 _exit (EXIT_FAILURE);
985 } 1489 }
986 1490
987 stack_start = cctx->sptr; 1491 stack_start = cctx->sptr;
988 stack_size = cctx->ssize; 1492 stack_size = cctx->ssize;
989 } 1493 }
990 1494
991 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1495 #if CORO_USE_VALGRIND
1496 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1497 #endif
1498
992 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1499 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
993 1500
994 return cctx; 1501 return cctx;
995} 1502}
996 1503
… …
998cctx_destroy (coro_cctx *cctx) 1505cctx_destroy (coro_cctx *cctx)
999{ 1506{
1000 if (!cctx) 1507 if (!cctx)
1001 return; 1508 return;
1002 1509
1510 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1511
1003 --cctx_count; 1512 --cctx_count;
1513 coro_destroy (&cctx->cctx);
1004 1514
1515 /* coro_transfer creates new, empty cctx's */
1516 if (cctx->sptr)
1517 {
1005#if CORO_USE_VALGRIND 1518 #if CORO_USE_VALGRIND
1006 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1519 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1520 #endif
1521
1522#if HAVE_MMAP
1523 if (cctx->flags & CC_MAPPED)
1524 munmap (cctx->sptr, cctx->ssize);
1525 else
1007#endif 1526#endif
1008
1009#if HAVE_MMAP
1010 if (cctx->flags & CC_MAPPED)
1011 munmap (cctx->sptr, cctx->ssize);
1012 else
1013#endif
1014 Safefree (cctx->sptr); 1527 Safefree (cctx->sptr);
1528 }
1015 1529
1016 Safefree (cctx); 1530 Safefree (cctx);
1017} 1531}
1018 1532
1019/* wether this cctx should be destructed */ 1533/* wether this cctx should be destructed */
1020#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1534#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1021 1535
1022static coro_cctx * 1536static coro_cctx *
1023cctx_get (pTHX) 1537cctx_get (pTHX)
1024{ 1538{
1025 while (expect_true (cctx_first)) 1539 while (ecb_expect_true (cctx_first))
1026 { 1540 {
1027 coro_cctx *cctx = cctx_first; 1541 coro_cctx *cctx = cctx_first;
1028 cctx_first = cctx->next; 1542 cctx_first = cctx->next;
1029 --cctx_idle; 1543 --cctx_idle;
1030 1544
1031 if (expect_true (!CCTX_EXPIRED (cctx))) 1545 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1032 return cctx; 1546 return cctx;
1033 1547
1034 cctx_destroy (cctx); 1548 cctx_destroy (cctx);
1035 } 1549 }
1036 1550
1037 return cctx_new (); 1551 return cctx_new_run ();
1038} 1552}
1039 1553
1040static void 1554static void
1041cctx_put (coro_cctx *cctx) 1555cctx_put (coro_cctx *cctx)
1042{ 1556{
1557 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1558
1043 /* free another cctx if overlimit */ 1559 /* free another cctx if overlimit */
1044 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1560 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1045 { 1561 {
1046 coro_cctx *first = cctx_first; 1562 coro_cctx *first = cctx_first;
1047 cctx_first = first->next; 1563 cctx_first = first->next;
1048 --cctx_idle; 1564 --cctx_idle;
1049 1565
… …
1058/** coroutine switching *****************************************************/ 1574/** coroutine switching *****************************************************/
1059 1575
1060static void 1576static void
1061transfer_check (pTHX_ struct coro *prev, struct coro *next) 1577transfer_check (pTHX_ struct coro *prev, struct coro *next)
1062{ 1578{
1579 /* TODO: throwing up here is considered harmful */
1580
1063 if (expect_true (prev != next)) 1581 if (ecb_expect_true (prev != next))
1064 { 1582 {
1065 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1583 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1066 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1584 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1067 1585
1068 if (expect_false (next->flags & CF_RUNNING)) 1586 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1069 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1070
1071 if (expect_false (next->flags & CF_DESTROYED))
1072 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1587 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1073 1588
1074 if (
1075#if PERL_VERSION_ATLEAST (5,9,0) 1589#if !PERL_VERSION_ATLEAST (5,10,0)
1076 expect_false (PL_parser)
1077#else
1078 expect_false (PL_lex_state != LEX_NOTPARSING) 1590 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1591 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1079#endif 1592#endif
1080 )
1081 croak ("Coro::State::transfer called while parsing, but this is not supported");
1082 } 1593 }
1083} 1594}
1084 1595
1085/* always use the TRANSFER macro */ 1596/* always use the TRANSFER macro */
1086static void NOINLINE 1597static void ecb_noinline /* noinline so we have a fixed stackframe */
1087transfer (pTHX_ struct coro *prev, struct coro *next) 1598transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1088{ 1599{
1089 dSTACKLEVEL; 1600 dSTACKLEVEL;
1090 1601
1091 /* sometimes transfer is only called to set idle_sp */ 1602 /* sometimes transfer is only called to set idle_sp */
1092 if (expect_false (!next)) 1603 if (ecb_expect_false (!prev))
1093 { 1604 {
1094 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1605 cctx_current->idle_sp = STACKLEVEL;
1095 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1606 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1096 } 1607 }
1097 else if (expect_true (prev != next)) 1608 else if (ecb_expect_true (prev != next))
1098 { 1609 {
1099 coro_cctx *prev__cctx; 1610 coro_cctx *cctx_prev;
1100 1611
1101 if (expect_false (prev->flags & CF_NEW)) 1612 if (ecb_expect_false (prev->flags & CF_NEW))
1102 { 1613 {
1103 /* create a new empty context */ 1614 /* create a new empty/source context */
1104 Newz (0, prev->cctx, 1, coro_cctx);
1105 prev->flags &= ~CF_NEW; 1615 prev->flags &= ~CF_NEW;
1106 prev->flags |= CF_RUNNING; 1616 prev->flags |= CF_RUNNING;
1107 } 1617 }
1108 1618
1109 prev->flags &= ~CF_RUNNING; 1619 prev->flags &= ~CF_RUNNING;
1110 next->flags |= CF_RUNNING; 1620 next->flags |= CF_RUNNING;
1111 1621
1112 LOCK; 1622 /* first get rid of the old state */
1623 save_perl (aTHX_ prev);
1113 1624
1114 if (expect_false (next->flags & CF_NEW)) 1625 if (ecb_expect_false (next->flags & CF_NEW))
1115 { 1626 {
1116 /* need to start coroutine */ 1627 /* need to start coroutine */
1117 next->flags &= ~CF_NEW; 1628 next->flags &= ~CF_NEW;
1118 /* first get rid of the old state */
1119 save_perl (aTHX_ prev);
1120 /* setup coroutine call */ 1629 /* setup coroutine call */
1121 coro_setup (aTHX_ next); 1630 init_perl (aTHX_ next);
1122 } 1631 }
1123 else 1632 else
1633 load_perl (aTHX_ next);
1634
1635 /* possibly untie and reuse the cctx */
1636 if (ecb_expect_true (
1637 cctx_current->idle_sp == STACKLEVEL
1638 && !(cctx_current->flags & CC_TRACE)
1639 && !force_cctx
1640 ))
1124 { 1641 {
1125 /* coroutine already started */ 1642 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1126 save_perl (aTHX_ prev); 1643 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1127 load_perl (aTHX_ next); 1644
1645 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1646 /* without this the next cctx_get might destroy the running cctx while still in use */
1647 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1648 if (ecb_expect_true (!next->cctx))
1649 next->cctx = cctx_get (aTHX);
1650
1651 cctx_put (cctx_current);
1128 } 1652 }
1653 else
1654 prev->cctx = cctx_current;
1129 1655
1130 prev__cctx = prev->cctx; 1656 ++next->usecount;
1131 1657
1132 /* possibly "free" the cctx */ 1658 cctx_prev = cctx_current;
1133 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1659 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1660
1661 next->cctx = 0;
1662
1663 if (ecb_expect_false (cctx_prev != cctx_current))
1134 { 1664 {
1135 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1665 cctx_prev->top_env = PL_top_env;
1136 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1666 PL_top_env = cctx_current->top_env;
1137 1667 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1138 prev->cctx = 0;
1139
1140 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1141 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1142 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1143 if (!next->cctx)
1144 next->cctx = cctx_get (aTHX);
1145
1146 cctx_put (prev__cctx);
1147 } 1668 }
1148 1669
1149 ++next->usecount; 1670 transfer_tail (aTHX);
1150
1151 if (expect_true (!next->cctx))
1152 next->cctx = cctx_get (aTHX);
1153
1154 if (expect_false (prev__cctx != next->cctx))
1155 {
1156 prev__cctx->top_env = PL_top_env;
1157 PL_top_env = next->cctx->top_env;
1158 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1159 }
1160
1161 free_coro_mortal (aTHX);
1162 UNLOCK;
1163
1164 if (expect_false (prev->throw || next->throw))
1165 {
1166 struct coro *coro = SvSTATE (coro_current);
1167
1168 if (coro->throw)
1169 {
1170 SV *exception = coro->throw;
1171 coro->throw = 0;
1172 sv_setsv (ERRSV, exception);
1173 croak (0);
1174 }
1175 }
1176 } 1671 }
1177} 1672}
1178 1673
1179struct transfer_args
1180{
1181 struct coro *prev, *next;
1182};
1183
1184#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1674#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1185#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1675#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1186 1676
1187/** high level stuff ********************************************************/ 1677/** high level stuff ********************************************************/
1188 1678
1679/* this function is actually Coro, not Coro::State, but we call it from here */
1680/* because it is convenient - but it hasn't been declared yet for that reason */
1189static int 1681static void
1682coro_call_on_destroy (pTHX_ struct coro *coro);
1683
1684static void
1190coro_state_destroy (pTHX_ struct coro *coro) 1685coro_state_destroy (pTHX_ struct coro *coro)
1191{ 1686{
1192 if (coro->flags & CF_DESTROYED) 1687 if (coro->flags & CF_ZOMBIE)
1193 return 0; 1688 return;
1194 1689
1690 slf_destroy (aTHX_ coro);
1691
1195 coro->flags |= CF_DESTROYED; 1692 coro->flags |= CF_ZOMBIE;
1196 1693
1197 if (coro->flags & CF_READY) 1694 if (coro->flags & CF_READY)
1198 { 1695 {
1199 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1696 /* reduce nready, as destroying a ready coro effectively unreadies it */
1200 /* alternative: look through all ready queues and remove the coro */ 1697 /* alternative: look through all ready queues and remove the coro */
1201 LOCK;
1202 --coro_nready; 1698 --coro_nready;
1203 UNLOCK;
1204 } 1699 }
1205 else 1700 else
1206 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1701 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1207
1208 if (coro->mainstack && coro->mainstack != main_mainstack)
1209 {
1210 struct coro temp;
1211
1212 if (coro->flags & CF_RUNNING)
1213 croak ("FATAL: tried to destroy currently running coroutine");
1214
1215 save_perl (aTHX_ &temp);
1216 load_perl (aTHX_ coro);
1217
1218 coro_destroy (aTHX_ coro);
1219
1220 load_perl (aTHX_ &temp);
1221
1222 coro->slot = 0;
1223 }
1224
1225 cctx_destroy (coro->cctx);
1226 SvREFCNT_dec (coro->args);
1227 1702
1228 if (coro->next) coro->next->prev = coro->prev; 1703 if (coro->next) coro->next->prev = coro->prev;
1229 if (coro->prev) coro->prev->next = coro->next; 1704 if (coro->prev) coro->prev->next = coro->next;
1230 if (coro == coro_first) coro_first = coro->next; 1705 if (coro == coro_first) coro_first = coro->next;
1231 1706
1232 return 1; 1707 if (coro->mainstack
1708 && coro->mainstack != main_mainstack
1709 && coro->slot
1710 && !PL_dirty)
1711 destroy_perl (aTHX_ coro);
1712
1713 cctx_destroy (coro->cctx);
1714 SvREFCNT_dec (coro->startcv);
1715 SvREFCNT_dec (coro->args);
1716 SvREFCNT_dec (coro->swap_sv);
1717 SvREFCNT_dec (CORO_THROW);
1718
1719 coro_call_on_destroy (aTHX_ coro);
1720
1721 /* more destruction mayhem in coro_state_free */
1233} 1722}
1234 1723
1235static int 1724static int
1236coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1725coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1237{ 1726{
1238 struct coro *coro = (struct coro *)mg->mg_ptr; 1727 struct coro *coro = (struct coro *)mg->mg_ptr;
1239 mg->mg_ptr = 0; 1728 mg->mg_ptr = 0;
1240 1729
1241 coro->hv = 0;
1242
1243 if (--coro->refcnt < 0)
1244 {
1245 coro_state_destroy (aTHX_ coro); 1730 coro_state_destroy (aTHX_ coro);
1731 SvREFCNT_dec (coro->on_destroy);
1732 SvREFCNT_dec (coro->status);
1733
1246 Safefree (coro); 1734 Safefree (coro);
1247 }
1248 1735
1249 return 0; 1736 return 0;
1250} 1737}
1251 1738
1252static int 1739static int ecb_cold
1253coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1740coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1254{ 1741{
1255 struct coro *coro = (struct coro *)mg->mg_ptr; 1742 /* called when perl clones the current process the slow way (windows process emulation) */
1256 1743 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1257 ++coro->refcnt; 1744 mg->mg_ptr = 0;
1745 mg->mg_virtual = 0;
1258 1746
1259 return 0; 1747 return 0;
1260} 1748}
1261 1749
1262static MGVTBL coro_state_vtbl = { 1750static MGVTBL coro_state_vtbl = {
… …
1269# define MGf_DUP 0 1757# define MGf_DUP 0
1270#endif 1758#endif
1271}; 1759};
1272 1760
1273static void 1761static void
1274prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1762prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1275{ 1763{
1276 ta->prev = SvSTATE (prev_sv); 1764 ta->prev = SvSTATE (prev_sv);
1277 ta->next = SvSTATE (next_sv); 1765 ta->next = SvSTATE (next_sv);
1278 TRANSFER_CHECK (*ta); 1766 TRANSFER_CHECK (*ta);
1279} 1767}
1280 1768
1281static void 1769static void
1282api_transfer (SV *prev_sv, SV *next_sv) 1770api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1771{
1772 struct coro_transfer_args ta;
1773
1774 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1775 TRANSFER (ta, 1);
1776}
1777
1778/** Coro ********************************************************************/
1779
1780ECB_INLINE void
1781coro_enq (pTHX_ struct coro *coro)
1782{
1783 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1784
1785 SvREFCNT_inc_NN (coro->hv);
1786
1787 coro->next_ready = 0;
1788 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1789 ready [1] = coro;
1790}
1791
1792ECB_INLINE struct coro *
1793coro_deq (pTHX)
1794{
1795 int prio;
1796
1797 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1798 {
1799 struct coro **ready = coro_ready [prio];
1800
1801 if (ready [0])
1802 {
1803 struct coro *coro = ready [0];
1804 ready [0] = coro->next_ready;
1805 return coro;
1806 }
1807 }
1808
1809 return 0;
1810}
1811
1812static void
1813invoke_sv_ready_hook_helper (void)
1283{ 1814{
1284 dTHX; 1815 dTHX;
1285 struct transfer_args ta; 1816 dSP;
1286 1817
1287 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1818 ENTER;
1288 TRANSFER (ta); 1819 SAVETMPS;
1289}
1290 1820
1291/** Coro ********************************************************************/ 1821 PUSHMARK (SP);
1822 PUTBACK;
1823 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1292 1824
1293static void 1825 FREETMPS;
1294coro_enq (pTHX_ SV *coro_sv) 1826 LEAVE;
1295{
1296 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1297}
1298
1299static SV *
1300coro_deq (pTHX_ int min_prio)
1301{
1302 int prio = PRIO_MAX - PRIO_MIN;
1303
1304 min_prio -= PRIO_MIN;
1305 if (min_prio < 0)
1306 min_prio = 0;
1307
1308 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1309 if (AvFILLp (coro_ready [prio]) >= 0)
1310 return av_shift (coro_ready [prio]);
1311
1312 return 0;
1313} 1827}
1314 1828
1315static int 1829static int
1316api_ready (SV *coro_sv) 1830api_ready (pTHX_ SV *coro_sv)
1317{ 1831{
1318 dTHX;
1319 struct coro *coro;
1320
1321 if (SvROK (coro_sv))
1322 coro_sv = SvRV (coro_sv);
1323
1324 coro = SvSTATE (coro_sv); 1832 struct coro *coro = SvSTATE (coro_sv);
1325 1833
1326 if (coro->flags & CF_READY) 1834 if (coro->flags & CF_READY)
1327 return 0; 1835 return 0;
1328 1836
1329 coro->flags |= CF_READY; 1837 coro->flags |= CF_READY;
1330 1838
1331 LOCK; 1839 coro_enq (aTHX_ coro);
1332 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1840
1333 ++coro_nready; 1841 if (!coro_nready++)
1334 UNLOCK; 1842 if (coroapi.readyhook)
1843 coroapi.readyhook ();
1335 1844
1336 return 1; 1845 return 1;
1337} 1846}
1338 1847
1339static int 1848static int
1340api_is_ready (SV *coro_sv) 1849api_is_ready (pTHX_ SV *coro_sv)
1341{ 1850{
1342 dTHX;
1343 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1851 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1344} 1852}
1345 1853
1346static void 1854/* expects to own a reference to next->hv */
1855ECB_INLINE void
1347prepare_schedule (pTHX_ struct transfer_args *ta) 1856prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1348{ 1857{
1349 SV *prev_sv, *next_sv;
1350
1351 for (;;)
1352 {
1353 LOCK;
1354 next_sv = coro_deq (aTHX_ PRIO_MIN);
1355
1356 /* nothing to schedule: call the idle handler */
1357 if (expect_false (!next_sv))
1358 {
1359 dSP;
1360 UNLOCK;
1361
1362 ENTER;
1363 SAVETMPS;
1364
1365 PUSHMARK (SP);
1366 PUTBACK;
1367 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1368
1369 FREETMPS;
1370 LEAVE;
1371 continue;
1372 }
1373
1374 ta->next = SvSTATE (next_sv);
1375
1376 /* cannot transfer to destroyed coros, skip and look for next */
1377 if (expect_false (ta->next->flags & CF_DESTROYED))
1378 {
1379 UNLOCK;
1380 SvREFCNT_dec (next_sv);
1381 /* coro_nready is already taken care of by destroy */
1382 continue;
1383 }
1384
1385 --coro_nready;
1386 UNLOCK;
1387 break;
1388 }
1389
1390 /* free this only after the transfer */
1391 prev_sv = SvRV (coro_current); 1858 SV *prev_sv = SvRV (coro_current);
1859
1392 ta->prev = SvSTATE (prev_sv); 1860 ta->prev = SvSTATE_hv (prev_sv);
1861 ta->next = next;
1862
1393 TRANSFER_CHECK (*ta); 1863 TRANSFER_CHECK (*ta);
1394 assert (ta->next->flags & CF_READY); 1864
1395 ta->next->flags &= ~CF_READY;
1396 SvRV_set (coro_current, next_sv); 1865 SvRV_set (coro_current, (SV *)next->hv);
1397 1866
1398 LOCK;
1399 free_coro_mortal (aTHX); 1867 free_coro_mortal (aTHX);
1400 coro_mortal = prev_sv; 1868 coro_mortal = prev_sv;
1401 UNLOCK;
1402} 1869}
1403 1870
1404static void 1871static void
1872prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1873{
1874 for (;;)
1875 {
1876 struct coro *next = coro_deq (aTHX);
1877
1878 if (ecb_expect_true (next))
1879 {
1880 /* cannot transfer to destroyed coros, skip and look for next */
1881 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1882 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1883 else
1884 {
1885 next->flags &= ~CF_READY;
1886 --coro_nready;
1887
1888 prepare_schedule_to (aTHX_ ta, next);
1889 break;
1890 }
1891 }
1892 else
1893 {
1894 /* nothing to schedule: call the idle handler */
1895 if (SvROK (sv_idle)
1896 && SvOBJECT (SvRV (sv_idle)))
1897 {
1898 if (SvRV (sv_idle) == SvRV (coro_current))
1899 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1900
1901 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1902 api_ready (aTHX_ SvRV (sv_idle));
1903 --coro_nready;
1904 }
1905 else
1906 {
1907 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1908 dSP;
1909
1910 ENTER;
1911 SAVETMPS;
1912
1913 PUSHMARK (SP);
1914 PUTBACK;
1915 call_sv (sv_idle, G_VOID | G_DISCARD);
1916
1917 FREETMPS;
1918 LEAVE;
1919 }
1920 }
1921 }
1922}
1923
1924ECB_INLINE void
1405prepare_cede (pTHX_ struct transfer_args *ta) 1925prepare_cede (pTHX_ struct coro_transfer_args *ta)
1406{ 1926{
1407 api_ready (coro_current); 1927 api_ready (aTHX_ coro_current);
1408 prepare_schedule (aTHX_ ta); 1928 prepare_schedule (aTHX_ ta);
1409} 1929}
1410 1930
1931ECB_INLINE void
1932prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1933{
1934 SV *prev = SvRV (coro_current);
1935
1936 if (coro_nready)
1937 {
1938 prepare_schedule (aTHX_ ta);
1939 api_ready (aTHX_ prev);
1940 }
1941 else
1942 prepare_nop (aTHX_ ta);
1943}
1944
1945static void
1946api_schedule (pTHX)
1947{
1948 struct coro_transfer_args ta;
1949
1950 prepare_schedule (aTHX_ &ta);
1951 TRANSFER (ta, 1);
1952}
1953
1954static void
1955api_schedule_to (pTHX_ SV *coro_sv)
1956{
1957 struct coro_transfer_args ta;
1958 struct coro *next = SvSTATE (coro_sv);
1959
1960 SvREFCNT_inc_NN (coro_sv);
1961 prepare_schedule_to (aTHX_ &ta, next);
1962}
1963
1411static int 1964static int
1412prepare_cede_notself (pTHX_ struct transfer_args *ta) 1965api_cede (pTHX)
1413{ 1966{
1414 if (coro_nready) 1967 struct coro_transfer_args ta;
1415 { 1968
1416 SV *prev = SvRV (coro_current);
1417 prepare_schedule (aTHX_ ta); 1969 prepare_cede (aTHX_ &ta);
1418 api_ready (prev); 1970
1971 if (ecb_expect_true (ta.prev != ta.next))
1972 {
1973 TRANSFER (ta, 1);
1419 return 1; 1974 return 1;
1420 } 1975 }
1421 else 1976 else
1422 return 0; 1977 return 0;
1423} 1978}
1424 1979
1425static void
1426api_schedule (void)
1427{
1428 dTHX;
1429 struct transfer_args ta;
1430
1431 prepare_schedule (aTHX_ &ta);
1432 TRANSFER (ta);
1433}
1434
1435static int 1980static int
1436api_cede (void) 1981api_cede_notself (pTHX)
1437{ 1982{
1438 dTHX; 1983 if (coro_nready)
1984 {
1439 struct transfer_args ta; 1985 struct coro_transfer_args ta;
1440 1986
1441 prepare_cede (aTHX_ &ta); 1987 prepare_cede_notself (aTHX_ &ta);
1442
1443 if (expect_true (ta.prev != ta.next))
1444 {
1445 TRANSFER (ta); 1988 TRANSFER (ta, 1);
1446 return 1; 1989 return 1;
1447 } 1990 }
1448 else 1991 else
1449 return 0; 1992 return 0;
1450} 1993}
1451 1994
1452static int 1995static void
1453api_cede_notself (void)
1454{
1455 dTHX;
1456 struct transfer_args ta;
1457
1458 if (prepare_cede_notself (aTHX_ &ta))
1459 {
1460 TRANSFER (ta);
1461 return 1;
1462 }
1463 else
1464 return 0;
1465}
1466
1467static void
1468api_trace (SV *coro_sv, int flags) 1996api_trace (pTHX_ SV *coro_sv, int flags)
1469{ 1997{
1470 dTHX;
1471 struct coro *coro = SvSTATE (coro_sv); 1998 struct coro *coro = SvSTATE (coro_sv);
1472 1999
2000 if (coro->flags & CF_RUNNING)
2001 croak ("cannot enable tracing on a running coroutine, caught");
2002
1473 if (flags & CC_TRACE) 2003 if (flags & CC_TRACE)
1474 { 2004 {
1475 if (!coro->cctx) 2005 if (!coro->cctx)
1476 coro->cctx = cctx_new (); 2006 coro->cctx = cctx_new_run ();
1477 else if (!(coro->cctx->flags & CC_TRACE)) 2007 else if (!(coro->cctx->flags & CC_TRACE))
1478 croak ("cannot enable tracing on coroutine with custom stack"); 2008 croak ("cannot enable tracing on coroutine with custom stack, caught");
1479 2009
1480 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2010 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1481 } 2011 }
1482 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2012 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1483 { 2013 {
… …
1488 else 2018 else
1489 coro->slot->runops = RUNOPS_DEFAULT; 2019 coro->slot->runops = RUNOPS_DEFAULT;
1490 } 2020 }
1491} 2021}
1492 2022
2023static void
2024coro_push_av (pTHX_ AV *av, I32 gimme_v)
2025{
2026 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2027 {
2028 dSP;
2029
2030 if (gimme_v == G_SCALAR)
2031 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2032 else
2033 {
2034 int i;
2035 EXTEND (SP, AvFILLp (av) + 1);
2036
2037 for (i = 0; i <= AvFILLp (av); ++i)
2038 PUSHs (AvARRAY (av)[i]);
2039 }
2040
2041 PUTBACK;
2042 }
2043}
2044
2045static void
2046coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2047{
2048 if (!coro->on_destroy)
2049 coro->on_destroy = newAV ();
2050
2051 av_push (coro->on_destroy, cb);
2052}
2053
2054static void
2055slf_destroy_join (pTHX_ struct CoroSLF *frame)
2056{
2057 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2058}
2059
2060static int
2061slf_check_join (pTHX_ struct CoroSLF *frame)
2062{
2063 struct coro *coro = (struct coro *)frame->data;
2064
2065 if (!coro->status)
2066 return 1;
2067
2068 frame->destroy = 0;
2069
2070 coro_push_av (aTHX_ coro->status, GIMME_V);
2071
2072 SvREFCNT_dec ((SV *)coro->hv);
2073
2074 return 0;
2075}
2076
2077static void
2078slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079{
2080 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2081
2082 if (items > 1)
2083 croak ("join called with too many arguments");
2084
2085 if (coro->status)
2086 frame->prepare = prepare_nop;
2087 else
2088 {
2089 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2090 frame->prepare = prepare_schedule;
2091 }
2092
2093 frame->check = slf_check_join;
2094 frame->destroy = slf_destroy_join;
2095 frame->data = (void *)coro;
2096 SvREFCNT_inc (coro->hv);
2097}
2098
2099static void
2100coro_call_on_destroy (pTHX_ struct coro *coro)
2101{
2102 AV *od = coro->on_destroy;
2103
2104 if (!od)
2105 return;
2106
2107 while (AvFILLp (od) >= 0)
2108 {
2109 SV *cb = sv_2mortal (av_pop (od));
2110
2111 /* coro hv's (and only hv's at the moment) are supported as well */
2112 if (SvSTATEhv_p (aTHX_ cb))
2113 api_ready (aTHX_ cb);
2114 else
2115 {
2116 dSP; /* don't disturb outer sp */
2117 PUSHMARK (SP);
2118
2119 if (coro->status)
2120 {
2121 PUTBACK;
2122 coro_push_av (aTHX_ coro->status, G_ARRAY);
2123 SPAGAIN;
2124 }
2125
2126 PUTBACK;
2127 call_sv (cb, G_VOID | G_DISCARD);
2128 }
2129 }
2130}
2131
2132static void
2133coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2134{
2135 AV *av;
2136
2137 if (coro->status)
2138 {
2139 av = coro->status;
2140 av_clear (av);
2141 }
2142 else
2143 av = coro->status = newAV ();
2144
2145 /* items are actually not so common, so optimise for this case */
2146 if (items)
2147 {
2148 int i;
2149
2150 av_extend (av, items - 1);
2151
2152 for (i = 0; i < items; ++i)
2153 av_push (av, SvREFCNT_inc_NN (arg [i]));
2154 }
2155}
2156
2157static void
2158slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2159{
2160 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2161 api_ready (aTHX_ sv_manager);
2162
2163 frame->prepare = prepare_schedule;
2164 frame->check = slf_check_repeat;
2165
2166 /* as a minor optimisation, we could unwind all stacks here */
2167 /* but that puts extra pressure on pp_slf, and is not worth much */
2168 /*coro_unwind_stacks (aTHX);*/
2169}
2170
2171static void
2172slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2173{
2174 HV *coro_hv = (HV *)SvRV (coro_current);
2175
2176 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2177 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2178}
2179
2180static void
2181slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2182{
2183 HV *coro_hv;
2184 struct coro *coro;
2185
2186 if (items <= 0)
2187 croak ("Coro::cancel called without coro object,");
2188
2189 coro = SvSTATE (arg [0]);
2190 coro_hv = coro->hv;
2191
2192 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2193
2194 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2195 {
2196 /* coro currently busy cancelling something, so just notify it */
2197 coro->slf_frame.data = (void *)coro;
2198
2199 frame->prepare = prepare_nop;
2200 frame->check = slf_check_nop;
2201 }
2202 else if (coro_hv == (HV *)SvRV (coro_current))
2203 {
2204 /* cancelling the current coro is allowed, and equals terminate */
2205 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2206 }
2207 else
2208 {
2209 struct coro *self = SvSTATE_current;
2210
2211 /* otherwise we cancel directly, purely for speed reasons
2212 * unfortunately, this requires some magic trickery, as
2213 * somebody else could cancel us, so we have to fight the cancellation.
2214 * this is ugly, and hopefully fully worth the extra speed.
2215 * besides, I can't get the slow-but-safe version working...
2216 */
2217 slf_frame.data = 0;
2218 self->flags |= CF_NOCANCEL;
2219 coro_state_destroy (aTHX_ coro);
2220 self->flags &= ~CF_NOCANCEL;
2221
2222 if (slf_frame.data)
2223 {
2224 /* while we were busy we have been cancelled, so terminate */
2225 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2226 }
2227 else
2228 {
2229 frame->prepare = prepare_nop;
2230 frame->check = slf_check_nop;
2231 }
2232 }
2233}
2234
2235static int
2236slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2237{
2238 frame->prepare = 0;
2239 coro_unwind_stacks (aTHX);
2240
2241 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2242
2243 return 1;
2244}
2245
2246static int
2247safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2248{
2249 if (coro->cctx)
2250 croak ("coro inside C callback, unable to cancel at this time, caught");
2251
2252 if (coro->flags & CF_NEW)
2253 {
2254 coro_set_status (aTHX_ coro, arg, items);
2255 coro_state_destroy (aTHX_ coro);
2256 }
2257 else
2258 {
2259 if (!coro->slf_frame.prepare)
2260 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2261
2262 slf_destroy (aTHX_ coro);
2263
2264 coro_set_status (aTHX_ coro, arg, items);
2265 coro->slf_frame.prepare = prepare_nop;
2266 coro->slf_frame.check = slf_check_safe_cancel;
2267
2268 api_ready (aTHX_ (SV *)coro->hv);
2269 }
2270
2271 return 1;
2272}
2273
2274/*****************************************************************************/
2275/* async pool handler */
2276
2277static int
2278slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2279{
2280 HV *hv = (HV *)SvRV (coro_current);
2281 struct coro *coro = (struct coro *)frame->data;
2282
2283 if (!coro->invoke_cb)
2284 return 1; /* loop till we have invoke */
2285 else
2286 {
2287 hv_store (hv, "desc", sizeof ("desc") - 1,
2288 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2289
2290 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2291
2292 {
2293 dSP;
2294 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2295 PUTBACK;
2296 }
2297
2298 SvREFCNT_dec (GvAV (PL_defgv));
2299 GvAV (PL_defgv) = coro->invoke_av;
2300 coro->invoke_av = 0;
2301
2302 return 0;
2303 }
2304}
2305
2306static void
2307slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2308{
2309 HV *hv = (HV *)SvRV (coro_current);
2310 struct coro *coro = SvSTATE_hv ((SV *)hv);
2311
2312 if (ecb_expect_true (coro->saved_deffh))
2313 {
2314 /* subsequent iteration */
2315 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2316 coro->saved_deffh = 0;
2317
2318 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2319 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2320 {
2321 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2322 return;
2323 }
2324 else
2325 {
2326 av_clear (GvAV (PL_defgv));
2327 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2328
2329 coro->prio = 0;
2330
2331 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2332 api_trace (aTHX_ coro_current, 0);
2333
2334 frame->prepare = prepare_schedule;
2335 av_push (av_async_pool, SvREFCNT_inc (hv));
2336 }
2337 }
2338 else
2339 {
2340 /* first iteration, simply fall through */
2341 frame->prepare = prepare_nop;
2342 }
2343
2344 frame->check = slf_check_pool_handler;
2345 frame->data = (void *)coro;
2346}
2347
2348/*****************************************************************************/
2349/* rouse callback */
2350
2351#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2352
2353static void
2354coro_rouse_callback (pTHX_ CV *cv)
2355{
2356 dXSARGS;
2357 SV *data = (SV *)S_GENSUB_ARG;
2358
2359 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2360 {
2361 /* first call, set args */
2362 SV *coro = SvRV (data);
2363 AV *av = newAV ();
2364
2365 SvRV_set (data, (SV *)av);
2366
2367 /* better take a full copy of the arguments */
2368 while (items--)
2369 av_store (av, items, newSVsv (ST (items)));
2370
2371 api_ready (aTHX_ coro);
2372 SvREFCNT_dec (coro);
2373 }
2374
2375 XSRETURN_EMPTY;
2376}
2377
2378static int
2379slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2380{
2381 SV *data = (SV *)frame->data;
2382
2383 if (CORO_THROW)
2384 return 0;
2385
2386 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2387 return 1;
2388
2389 /* now push all results on the stack */
2390 {
2391 dSP;
2392 AV *av = (AV *)SvRV (data);
2393 int i;
2394
2395 EXTEND (SP, AvFILLp (av) + 1);
2396 for (i = 0; i <= AvFILLp (av); ++i)
2397 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2398
2399 /* we have stolen the elements, so set length to zero and free */
2400 AvFILLp (av) = -1;
2401 av_undef (av);
2402
2403 PUTBACK;
2404 }
2405
2406 return 0;
2407}
2408
2409static void
2410slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2411{
2412 SV *cb;
2413
2414 if (items)
2415 cb = arg [0];
2416 else
2417 {
2418 struct coro *coro = SvSTATE_current;
2419
2420 if (!coro->rouse_cb)
2421 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2422
2423 cb = sv_2mortal (coro->rouse_cb);
2424 coro->rouse_cb = 0;
2425 }
2426
2427 if (!SvROK (cb)
2428 || SvTYPE (SvRV (cb)) != SVt_PVCV
2429 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2430 croak ("Coro::rouse_wait called with illegal callback argument,");
2431
2432 {
2433 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2434 SV *data = (SV *)S_GENSUB_ARG;
2435
2436 frame->data = (void *)data;
2437 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2438 frame->check = slf_check_rouse_wait;
2439 }
2440}
2441
2442static SV *
2443coro_new_rouse_cb (pTHX)
2444{
2445 HV *hv = (HV *)SvRV (coro_current);
2446 struct coro *coro = SvSTATE_hv (hv);
2447 SV *data = newRV_inc ((SV *)hv);
2448 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2449
2450 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2451 SvREFCNT_dec (data); /* magicext increases the refcount */
2452
2453 SvREFCNT_dec (coro->rouse_cb);
2454 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2455
2456 return cb;
2457}
2458
2459/*****************************************************************************/
2460/* schedule-like-function opcode (SLF) */
2461
2462static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2463static const CV *slf_cv;
2464static SV **slf_argv;
2465static int slf_argc, slf_arga; /* count, allocated */
2466static I32 slf_ax; /* top of stack, for restore */
2467
2468/* this restores the stack in the case we patched the entersub, to */
2469/* recreate the stack frame as perl will on following calls */
2470/* since entersub cleared the stack */
2471static OP *
2472pp_restore (pTHX)
2473{
2474 int i;
2475 SV **SP = PL_stack_base + slf_ax;
2476
2477 PUSHMARK (SP);
2478
2479 EXTEND (SP, slf_argc + 1);
2480
2481 for (i = 0; i < slf_argc; ++i)
2482 PUSHs (sv_2mortal (slf_argv [i]));
2483
2484 PUSHs ((SV *)CvGV (slf_cv));
2485
2486 RETURNOP (slf_restore.op_first);
2487}
2488
2489static void
2490slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2491{
2492 SV **arg = (SV **)slf_frame.data;
2493
2494 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2495}
2496
2497static void
2498slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2499{
2500 if (items != 2)
2501 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2502
2503 frame->prepare = slf_prepare_transfer;
2504 frame->check = slf_check_nop;
2505 frame->data = (void *)arg; /* let's hope it will stay valid */
2506}
2507
2508static void
2509slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2510{
2511 frame->prepare = prepare_schedule;
2512 frame->check = slf_check_nop;
2513}
2514
2515static void
2516slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2517{
2518 struct coro *next = (struct coro *)slf_frame.data;
2519
2520 SvREFCNT_inc_NN (next->hv);
2521 prepare_schedule_to (aTHX_ ta, next);
2522}
2523
2524static void
2525slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (!items)
2528 croak ("Coro::schedule_to expects a coroutine argument, caught");
2529
2530 frame->data = (void *)SvSTATE (arg [0]);
2531 frame->prepare = slf_prepare_schedule_to;
2532 frame->check = slf_check_nop;
2533}
2534
2535static void
2536slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 api_ready (aTHX_ SvRV (coro_current));
2539
2540 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2541}
2542
2543static void
2544slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2545{
2546 frame->prepare = prepare_cede;
2547 frame->check = slf_check_nop;
2548}
2549
2550static void
2551slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 frame->prepare = prepare_cede_notself;
2554 frame->check = slf_check_nop;
2555}
2556
2557/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2558static void
2559slf_destroy (pTHX_ struct coro *coro)
2560{
2561 /* this callback is reserved for slf functions needing to do cleanup */
2562 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2563 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2564
2565 /*
2566 * The on_destroy above most likely is from an SLF call.
2567 * Since by definition the SLF call will not finish when we destroy
2568 * the coro, we will have to force-finish it here, otherwise
2569 * cleanup functions cannot call SLF functions.
2570 */
2571 coro->slf_frame.prepare = 0;
2572}
2573
2574/*
2575 * these not obviously related functions are all rolled into one
2576 * function to increase chances that they all will call transfer with the same
2577 * stack offset
2578 * SLF stands for "schedule-like-function".
2579 */
2580static OP *
2581pp_slf (pTHX)
2582{
2583 I32 checkmark; /* mark SP to see how many elements check has pushed */
2584
2585 /* set up the slf frame, unless it has already been set-up */
2586 /* the latter happens when a new coro has been started */
2587 /* or when a new cctx was attached to an existing coroutine */
2588 if (ecb_expect_true (!slf_frame.prepare))
2589 {
2590 /* first iteration */
2591 dSP;
2592 SV **arg = PL_stack_base + TOPMARK + 1;
2593 int items = SP - arg; /* args without function object */
2594 SV *gv = *sp;
2595
2596 /* do a quick consistency check on the "function" object, and if it isn't */
2597 /* for us, divert to the real entersub */
2598 if (SvTYPE (gv) != SVt_PVGV
2599 || !GvCV (gv)
2600 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2601 return PL_ppaddr[OP_ENTERSUB](aTHX);
2602
2603 if (!(PL_op->op_flags & OPf_STACKED))
2604 {
2605 /* ampersand-form of call, use @_ instead of stack */
2606 AV *av = GvAV (PL_defgv);
2607 arg = AvARRAY (av);
2608 items = AvFILLp (av) + 1;
2609 }
2610
2611 /* now call the init function, which needs to set up slf_frame */
2612 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2613 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2614
2615 /* pop args */
2616 SP = PL_stack_base + POPMARK;
2617
2618 PUTBACK;
2619 }
2620
2621 /* now that we have a slf_frame, interpret it! */
2622 /* we use a callback system not to make the code needlessly */
2623 /* complicated, but so we can run multiple perl coros from one cctx */
2624
2625 do
2626 {
2627 struct coro_transfer_args ta;
2628
2629 slf_frame.prepare (aTHX_ &ta);
2630 TRANSFER (ta, 0);
2631
2632 checkmark = PL_stack_sp - PL_stack_base;
2633 }
2634 while (slf_frame.check (aTHX_ &slf_frame));
2635
2636 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2637
2638 /* exception handling */
2639 if (ecb_expect_false (CORO_THROW))
2640 {
2641 SV *exception = sv_2mortal (CORO_THROW);
2642
2643 CORO_THROW = 0;
2644 sv_setsv (ERRSV, exception);
2645 croak (0);
2646 }
2647
2648 /* return value handling - mostly like entersub */
2649 /* make sure we put something on the stack in scalar context */
2650 if (GIMME_V == G_SCALAR
2651 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2652 {
2653 dSP;
2654 SV **bot = PL_stack_base + checkmark;
2655
2656 if (sp == bot) /* too few, push undef */
2657 bot [1] = &PL_sv_undef;
2658 else /* too many, take last one */
2659 bot [1] = *sp;
2660
2661 SP = bot + 1;
2662
2663 PUTBACK;
2664 }
2665
2666 return NORMAL;
2667}
2668
2669static void
2670api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2671{
2672 int i;
2673 SV **arg = PL_stack_base + ax;
2674 int items = PL_stack_sp - arg + 1;
2675
2676 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2677
2678 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2679 && PL_op->op_ppaddr != pp_slf)
2680 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2681
2682 CvFLAGS (cv) |= CVf_SLF;
2683 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2684 slf_cv = cv;
2685
2686 /* we patch the op, and then re-run the whole call */
2687 /* we have to put the same argument on the stack for this to work */
2688 /* and this will be done by pp_restore */
2689 slf_restore.op_next = (OP *)&slf_restore;
2690 slf_restore.op_type = OP_CUSTOM;
2691 slf_restore.op_ppaddr = pp_restore;
2692 slf_restore.op_first = PL_op;
2693
2694 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2695
2696 if (PL_op->op_flags & OPf_STACKED)
2697 {
2698 if (items > slf_arga)
2699 {
2700 slf_arga = items;
2701 Safefree (slf_argv);
2702 New (0, slf_argv, slf_arga, SV *);
2703 }
2704
2705 slf_argc = items;
2706
2707 for (i = 0; i < items; ++i)
2708 slf_argv [i] = SvREFCNT_inc (arg [i]);
2709 }
2710 else
2711 slf_argc = 0;
2712
2713 PL_op->op_ppaddr = pp_slf;
2714 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2715
2716 PL_op = (OP *)&slf_restore;
2717}
2718
2719/*****************************************************************************/
2720/* dynamic wind */
2721
2722static void
2723on_enterleave_call (pTHX_ SV *cb)
2724{
2725 dSP;
2726
2727 PUSHSTACK;
2728
2729 PUSHMARK (SP);
2730 PUTBACK;
2731 call_sv (cb, G_VOID | G_DISCARD);
2732 SPAGAIN;
2733
2734 POPSTACK;
2735}
2736
2737static SV *
2738coro_avp_pop_and_free (pTHX_ AV **avp)
2739{
2740 AV *av = *avp;
2741 SV *res = av_pop (av);
2742
2743 if (AvFILLp (av) < 0)
2744 {
2745 *avp = 0;
2746 SvREFCNT_dec (av);
2747 }
2748
2749 return res;
2750}
2751
2752static void
2753coro_pop_on_enter (pTHX_ void *coro)
2754{
2755 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2756 SvREFCNT_dec (cb);
2757}
2758
2759static void
2760coro_pop_on_leave (pTHX_ void *coro)
2761{
2762 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2763 on_enterleave_call (aTHX_ sv_2mortal (cb));
2764}
2765
2766/*****************************************************************************/
2767/* PerlIO::cede */
2768
2769typedef struct
2770{
2771 PerlIOBuf base;
2772 NV next, every;
2773} PerlIOCede;
2774
2775static IV ecb_cold
2776PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2777{
2778 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2779
2780 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2781 self->next = nvtime () + self->every;
2782
2783 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2784}
2785
2786static SV * ecb_cold
2787PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2788{
2789 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2790
2791 return newSVnv (self->every);
2792}
2793
2794static IV
2795PerlIOCede_flush (pTHX_ PerlIO *f)
2796{
2797 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2798 double now = nvtime ();
2799
2800 if (now >= self->next)
2801 {
2802 api_cede (aTHX);
2803 self->next = now + self->every;
2804 }
2805
2806 return PerlIOBuf_flush (aTHX_ f);
2807}
2808
2809static PerlIO_funcs PerlIO_cede =
2810{
2811 sizeof(PerlIO_funcs),
2812 "cede",
2813 sizeof(PerlIOCede),
2814 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2815 PerlIOCede_pushed,
2816 PerlIOBuf_popped,
2817 PerlIOBuf_open,
2818 PerlIOBase_binmode,
2819 PerlIOCede_getarg,
2820 PerlIOBase_fileno,
2821 PerlIOBuf_dup,
2822 PerlIOBuf_read,
2823 PerlIOBuf_unread,
2824 PerlIOBuf_write,
2825 PerlIOBuf_seek,
2826 PerlIOBuf_tell,
2827 PerlIOBuf_close,
2828 PerlIOCede_flush,
2829 PerlIOBuf_fill,
2830 PerlIOBase_eof,
2831 PerlIOBase_error,
2832 PerlIOBase_clearerr,
2833 PerlIOBase_setlinebuf,
2834 PerlIOBuf_get_base,
2835 PerlIOBuf_bufsiz,
2836 PerlIOBuf_get_ptr,
2837 PerlIOBuf_get_cnt,
2838 PerlIOBuf_set_ptrcnt,
2839};
2840
2841/*****************************************************************************/
2842/* Coro::Semaphore & Coro::Signal */
2843
2844static SV *
2845coro_waitarray_new (pTHX_ int count)
2846{
2847 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2848 AV *av = newAV ();
2849 SV **ary;
2850
2851 /* unfortunately, building manually saves memory */
2852 Newx (ary, 2, SV *);
2853 AvALLOC (av) = ary;
2854#if PERL_VERSION_ATLEAST (5,10,0)
2855 AvARRAY (av) = ary;
2856#else
2857 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2858 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2859 SvPVX ((SV *)av) = (char *)ary;
2860#endif
2861 AvMAX (av) = 1;
2862 AvFILLp (av) = 0;
2863 ary [0] = newSViv (count);
2864
2865 return newRV_noinc ((SV *)av);
2866}
2867
2868/* semaphore */
2869
2870static void
2871coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2872{
2873 SV *count_sv = AvARRAY (av)[0];
2874 IV count = SvIVX (count_sv);
2875
2876 count += adjust;
2877 SvIVX (count_sv) = count;
2878
2879 /* now wake up as many waiters as are expected to lock */
2880 while (count > 0 && AvFILLp (av) > 0)
2881 {
2882 SV *cb;
2883
2884 /* swap first two elements so we can shift a waiter */
2885 AvARRAY (av)[0] = AvARRAY (av)[1];
2886 AvARRAY (av)[1] = count_sv;
2887 cb = av_shift (av);
2888
2889 if (SvOBJECT (cb))
2890 {
2891 api_ready (aTHX_ cb);
2892 --count;
2893 }
2894 else if (SvTYPE (cb) == SVt_PVCV)
2895 {
2896 dSP;
2897 PUSHMARK (SP);
2898 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2899 PUTBACK;
2900 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2901 }
2902
2903 SvREFCNT_dec (cb);
2904 }
2905}
2906
2907static void
2908coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2909{
2910 /* call $sem->adjust (0) to possibly wake up some other waiters */
2911 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2912}
2913
2914static int
2915slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2916{
2917 AV *av = (AV *)frame->data;
2918 SV *count_sv = AvARRAY (av)[0];
2919 SV *coro_hv = SvRV (coro_current);
2920
2921 /* if we are about to throw, don't actually acquire the lock, just throw */
2922 if (CORO_THROW)
2923 return 0;
2924 else if (SvIVX (count_sv) > 0)
2925 {
2926 frame->destroy = 0;
2927
2928 if (acquire)
2929 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2930 else
2931 coro_semaphore_adjust (aTHX_ av, 0);
2932
2933 return 0;
2934 }
2935 else
2936 {
2937 int i;
2938 /* if we were woken up but can't down, we look through the whole */
2939 /* waiters list and only add us if we aren't in there already */
2940 /* this avoids some degenerate memory usage cases */
2941 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2942 if (AvARRAY (av)[i] == coro_hv)
2943 return 1;
2944
2945 av_push (av, SvREFCNT_inc (coro_hv));
2946 return 1;
2947 }
2948}
2949
2950static int
2951slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2952{
2953 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2954}
2955
2956static int
2957slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2958{
2959 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2960}
2961
2962static void
2963slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2964{
2965 AV *av = (AV *)SvRV (arg [0]);
2966
2967 if (SvIVX (AvARRAY (av)[0]) > 0)
2968 {
2969 frame->data = (void *)av;
2970 frame->prepare = prepare_nop;
2971 }
2972 else
2973 {
2974 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2975
2976 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2977 frame->prepare = prepare_schedule;
2978 /* to avoid race conditions when a woken-up coro gets terminated */
2979 /* we arrange for a temporary on_destroy that calls adjust (0) */
2980 frame->destroy = coro_semaphore_destroy;
2981 }
2982}
2983
2984static void
2985slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2986{
2987 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2988 frame->check = slf_check_semaphore_down;
2989}
2990
2991static void
2992slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2993{
2994 if (items >= 2)
2995 {
2996 /* callback form */
2997 AV *av = (AV *)SvRV (arg [0]);
2998 SV *cb_cv = s_get_cv_croak (arg [1]);
2999
3000 av_push (av, SvREFCNT_inc_NN (cb_cv));
3001
3002 if (SvIVX (AvARRAY (av)[0]) > 0)
3003 coro_semaphore_adjust (aTHX_ av, 0);
3004
3005 frame->prepare = prepare_nop;
3006 frame->check = slf_check_nop;
3007 }
3008 else
3009 {
3010 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3011 frame->check = slf_check_semaphore_wait;
3012 }
3013}
3014
3015/* signal */
3016
3017static void
3018coro_signal_wake (pTHX_ AV *av, int count)
3019{
3020 SvIVX (AvARRAY (av)[0]) = 0;
3021
3022 /* now signal count waiters */
3023 while (count > 0 && AvFILLp (av) > 0)
3024 {
3025 SV *cb;
3026
3027 /* swap first two elements so we can shift a waiter */
3028 cb = AvARRAY (av)[0];
3029 AvARRAY (av)[0] = AvARRAY (av)[1];
3030 AvARRAY (av)[1] = cb;
3031
3032 cb = av_shift (av);
3033
3034 if (SvTYPE (cb) == SVt_PVCV)
3035 {
3036 dSP;
3037 PUSHMARK (SP);
3038 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3039 PUTBACK;
3040 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3041 }
3042 else
3043 {
3044 api_ready (aTHX_ cb);
3045 sv_setiv (cb, 0); /* signal waiter */
3046 }
3047
3048 SvREFCNT_dec (cb);
3049
3050 --count;
3051 }
3052}
3053
3054static int
3055slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3056{
3057 /* if we are about to throw, also stop waiting */
3058 return SvROK ((SV *)frame->data) && !CORO_THROW;
3059}
3060
3061static void
3062slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3063{
3064 AV *av = (AV *)SvRV (arg [0]);
3065
3066 if (items >= 2)
3067 {
3068 SV *cb_cv = s_get_cv_croak (arg [1]);
3069 av_push (av, SvREFCNT_inc_NN (cb_cv));
3070
3071 if (SvIVX (AvARRAY (av)[0]))
3072 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3073
3074 frame->prepare = prepare_nop;
3075 frame->check = slf_check_nop;
3076 }
3077 else if (SvIVX (AvARRAY (av)[0]))
3078 {
3079 SvIVX (AvARRAY (av)[0]) = 0;
3080 frame->prepare = prepare_nop;
3081 frame->check = slf_check_nop;
3082 }
3083 else
3084 {
3085 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3086
3087 av_push (av, waiter);
3088
3089 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3090 frame->prepare = prepare_schedule;
3091 frame->check = slf_check_signal_wait;
3092 }
3093}
3094
3095/*****************************************************************************/
3096/* Coro::AIO */
3097
3098#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3099
3100/* helper storage struct */
3101struct io_state
3102{
3103 int errorno;
3104 I32 laststype; /* U16 in 5.10.0 */
3105 int laststatval;
3106 Stat_t statcache;
3107};
3108
3109static void
3110coro_aio_callback (pTHX_ CV *cv)
3111{
3112 dXSARGS;
3113 AV *state = (AV *)S_GENSUB_ARG;
3114 SV *coro = av_pop (state);
3115 SV *data_sv = newSV (sizeof (struct io_state));
3116
3117 av_extend (state, items - 1);
3118
3119 sv_upgrade (data_sv, SVt_PV);
3120 SvCUR_set (data_sv, sizeof (struct io_state));
3121 SvPOK_only (data_sv);
3122
3123 {
3124 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3125
3126 data->errorno = errno;
3127 data->laststype = PL_laststype;
3128 data->laststatval = PL_laststatval;
3129 data->statcache = PL_statcache;
3130 }
3131
3132 /* now build the result vector out of all the parameters and the data_sv */
3133 {
3134 int i;
3135
3136 for (i = 0; i < items; ++i)
3137 av_push (state, SvREFCNT_inc_NN (ST (i)));
3138 }
3139
3140 av_push (state, data_sv);
3141
3142 api_ready (aTHX_ coro);
3143 SvREFCNT_dec (coro);
3144 SvREFCNT_dec ((AV *)state);
3145}
3146
3147static int
3148slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3149{
3150 AV *state = (AV *)frame->data;
3151
3152 /* if we are about to throw, return early */
3153 /* this does not cancel the aio request, but at least */
3154 /* it quickly returns */
3155 if (CORO_THROW)
3156 return 0;
3157
3158 /* one element that is an RV? repeat! */
3159 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3160 return 1;
3161
3162 /* restore status */
3163 {
3164 SV *data_sv = av_pop (state);
3165 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3166
3167 errno = data->errorno;
3168 PL_laststype = data->laststype;
3169 PL_laststatval = data->laststatval;
3170 PL_statcache = data->statcache;
3171
3172 SvREFCNT_dec (data_sv);
3173 }
3174
3175 /* push result values */
3176 {
3177 dSP;
3178 int i;
3179
3180 EXTEND (SP, AvFILLp (state) + 1);
3181 for (i = 0; i <= AvFILLp (state); ++i)
3182 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3183
3184 PUTBACK;
3185 }
3186
3187 return 0;
3188}
3189
3190static void
3191slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3192{
3193 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3194 SV *coro_hv = SvRV (coro_current);
3195 struct coro *coro = SvSTATE_hv (coro_hv);
3196
3197 /* put our coroutine id on the state arg */
3198 av_push (state, SvREFCNT_inc_NN (coro_hv));
3199
3200 /* first see whether we have a non-zero priority and set it as AIO prio */
3201 if (coro->prio)
3202 {
3203 dSP;
3204
3205 static SV *prio_cv;
3206 static SV *prio_sv;
3207
3208 if (ecb_expect_false (!prio_cv))
3209 {
3210 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3211 prio_sv = newSViv (0);
3212 }
3213
3214 PUSHMARK (SP);
3215 sv_setiv (prio_sv, coro->prio);
3216 XPUSHs (prio_sv);
3217
3218 PUTBACK;
3219 call_sv (prio_cv, G_VOID | G_DISCARD);
3220 }
3221
3222 /* now call the original request */
3223 {
3224 dSP;
3225 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3226 int i;
3227
3228 PUSHMARK (SP);
3229
3230 /* first push all args to the stack */
3231 EXTEND (SP, items + 1);
3232
3233 for (i = 0; i < items; ++i)
3234 PUSHs (arg [i]);
3235
3236 /* now push the callback closure */
3237 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3238
3239 /* now call the AIO function - we assume our request is uncancelable */
3240 PUTBACK;
3241 call_sv ((SV *)req, G_VOID | G_DISCARD);
3242 }
3243
3244 /* now that the request is going, we loop till we have a result */
3245 frame->data = (void *)state;
3246 frame->prepare = prepare_schedule;
3247 frame->check = slf_check_aio_req;
3248}
3249
3250static void
3251coro_aio_req_xs (pTHX_ CV *cv)
3252{
3253 dXSARGS;
3254
3255 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3256
3257 XSRETURN_EMPTY;
3258}
3259
3260/*****************************************************************************/
3261
3262#if CORO_CLONE
3263# include "clone.c"
3264#endif
3265
3266/*****************************************************************************/
3267
3268static SV *
3269coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3270{
3271 SV *coro_sv;
3272 struct coro *coro;
3273 MAGIC *mg;
3274 HV *hv;
3275 SV *cb;
3276 int i;
3277
3278 if (argc > 0)
3279 {
3280 cb = s_get_cv_croak (argv [0]);
3281
3282 if (!is_coro)
3283 {
3284 if (CvISXSUB (cb))
3285 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3286
3287 if (!CvROOT (cb))
3288 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3289 }
3290 }
3291
3292 Newz (0, coro, 1, struct coro);
3293 coro->args = newAV ();
3294 coro->flags = CF_NEW;
3295
3296 if (coro_first) coro_first->prev = coro;
3297 coro->next = coro_first;
3298 coro_first = coro;
3299
3300 coro->hv = hv = newHV ();
3301 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3302 mg->mg_flags |= MGf_DUP;
3303 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3304
3305 if (argc > 0)
3306 {
3307 av_extend (coro->args, argc + is_coro - 1);
3308
3309 if (is_coro)
3310 {
3311 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3312 cb = (SV *)cv_coro_run;
3313 }
3314
3315 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3316
3317 for (i = 1; i < argc; i++)
3318 av_push (coro->args, newSVsv (argv [i]));
3319 }
3320
3321 return coro_sv;
3322}
3323
3324#ifndef __cplusplus
3325ecb_cold XS(boot_Coro__State);
3326#endif
3327
1493MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3328MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1494 3329
1495PROTOTYPES: DISABLE 3330PROTOTYPES: DISABLE
1496 3331
1497BOOT: 3332BOOT:
1498{ 3333{
1499#ifdef USE_ITHREADS 3334#ifdef USE_ITHREADS
1500 MUTEX_INIT (&coro_mutex); 3335# if CORO_PTHREAD
3336 coro_thx = PERL_GET_CONTEXT;
3337# endif
1501#endif 3338#endif
1502 BOOT_PAGESIZE; 3339 BOOT_PAGESIZE;
1503 3340
3341 cctx_current = cctx_new_empty ();
3342
1504 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3343 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1505 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3344 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1506 3345
3346 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3347 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3348 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3349
1507 hv_sig = coro_get_hv ("SIG", TRUE); 3350 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1508 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE); 3351 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1509 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE); 3352 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1510
1511 if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
1512 if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
1513 3353
1514 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3354 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1515 3355
1516 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3356 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1517 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3357 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1522 main_top_env = PL_top_env; 3362 main_top_env = PL_top_env;
1523 3363
1524 while (main_top_env->je_prev) 3364 while (main_top_env->je_prev)
1525 main_top_env = main_top_env->je_prev; 3365 main_top_env = main_top_env->je_prev;
1526 3366
3367 {
3368 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3369
3370 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3371 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3372
3373 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3374 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3375 }
3376
1527 coroapi.ver = CORO_API_VERSION; 3377 coroapi.ver = CORO_API_VERSION;
3378 coroapi.rev = CORO_API_REVISION;
3379
1528 coroapi.transfer = api_transfer; 3380 coroapi.transfer = api_transfer;
1529 3381
3382 coroapi.sv_state = SvSTATE_;
3383 coroapi.execute_slf = api_execute_slf;
3384 coroapi.prepare_nop = prepare_nop;
3385 coroapi.prepare_schedule = prepare_schedule;
3386 coroapi.prepare_cede = prepare_cede;
3387 coroapi.prepare_cede_notself = prepare_cede_notself;
3388
3389 time_init (aTHX);
3390
1530 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3391 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1531} 3392}
1532 3393
1533SV * 3394SV *
1534new (char *klass, ...) 3395new (SV *klass, ...)
3396 ALIAS:
3397 Coro::new = 1
1535 CODE: 3398 CODE:
1536{ 3399 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1537 struct coro *coro;
1538 HV *hv;
1539 int i;
1540
1541 Newz (0, coro, 1, struct coro);
1542 coro->args = newAV ();
1543 coro->flags = CF_NEW;
1544
1545 if (coro_first) coro_first->prev = coro;
1546 coro->next = coro_first;
1547 coro_first = coro;
1548
1549 coro->hv = hv = newHV ();
1550 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1551 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1552
1553 av_extend (coro->args, items - 1);
1554 for (i = 1; i < items; i++)
1555 av_push (coro->args, newSVsv (ST (i)));
1556}
1557 OUTPUT:
1558 RETVAL
1559
1560# these not obviously related functions are all rolled into the same xs
1561# function to increase chances that they all will call transfer with the same
1562# stack offset
1563void
1564_set_stacklevel (...)
1565 ALIAS:
1566 Coro::State::transfer = 1
1567 Coro::schedule = 2
1568 Coro::cede = 3
1569 Coro::cede_notself = 4
1570 CODE:
1571{
1572 struct transfer_args ta;
1573
1574 switch (ix)
1575 {
1576 case 0:
1577 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1578 ta.next = 0;
1579 break;
1580
1581 case 1:
1582 if (items != 2)
1583 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1584
1585 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1586 break;
1587
1588 case 2:
1589 prepare_schedule (aTHX_ &ta);
1590 break;
1591
1592 case 3:
1593 prepare_cede (aTHX_ &ta);
1594 break;
1595
1596 case 4:
1597 if (!prepare_cede_notself (aTHX_ &ta))
1598 XSRETURN_EMPTY;
1599
1600 break;
1601 }
1602
1603 BARRIER;
1604 TRANSFER (ta);
1605
1606 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1607 XSRETURN_YES;
1608}
1609
1610bool
1611_destroy (SV *coro_sv)
1612 CODE:
1613 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1614 OUTPUT: 3400 OUTPUT:
1615 RETVAL 3401 RETVAL
1616 3402
1617void 3403void
3404transfer (...)
3405 PROTOTYPE: $$
3406 CODE:
3407 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3408
3409void
1618_exit (code) 3410_exit (int code)
1619 int code
1620 PROTOTYPE: $ 3411 PROTOTYPE: $
1621 CODE: 3412 CODE:
1622 _exit (code); 3413 _exit (code);
1623 3414
3415SV *
3416clone (Coro::State coro)
3417 CODE:
3418{
3419#if CORO_CLONE
3420 struct coro *ncoro = coro_clone (aTHX_ coro);
3421 MAGIC *mg;
3422 /* TODO: too much duplication */
3423 ncoro->hv = newHV ();
3424 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3425 mg->mg_flags |= MGf_DUP;
3426 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3427#else
3428 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3429#endif
3430}
3431 OUTPUT:
3432 RETVAL
3433
1624int 3434int
1625cctx_stacksize (int new_stacksize = 0) 3435cctx_stacksize (int new_stacksize = 0)
3436 PROTOTYPE: ;$
1626 CODE: 3437 CODE:
1627 RETVAL = coro_stacksize; 3438 RETVAL = cctx_stacksize;
1628 if (new_stacksize) 3439 if (new_stacksize)
3440 {
1629 coro_stacksize = new_stacksize; 3441 cctx_stacksize = new_stacksize;
3442 ++cctx_gen;
3443 }
1630 OUTPUT: 3444 OUTPUT:
1631 RETVAL 3445 RETVAL
1632 3446
1633int 3447int
3448cctx_max_idle (int max_idle = 0)
3449 PROTOTYPE: ;$
3450 CODE:
3451 RETVAL = cctx_max_idle;
3452 if (max_idle > 1)
3453 cctx_max_idle = max_idle;
3454 OUTPUT:
3455 RETVAL
3456
3457int
1634cctx_count () 3458cctx_count ()
3459 PROTOTYPE:
1635 CODE: 3460 CODE:
1636 RETVAL = cctx_count; 3461 RETVAL = cctx_count;
1637 OUTPUT: 3462 OUTPUT:
1638 RETVAL 3463 RETVAL
1639 3464
1640int 3465int
1641cctx_idle () 3466cctx_idle ()
3467 PROTOTYPE:
1642 CODE: 3468 CODE:
1643 RETVAL = cctx_idle; 3469 RETVAL = cctx_idle;
1644 OUTPUT: 3470 OUTPUT:
1645 RETVAL 3471 RETVAL
1646 3472
1647void 3473void
1648list () 3474list ()
3475 PROTOTYPE:
1649 PPCODE: 3476 PPCODE:
1650{ 3477{
1651 struct coro *coro; 3478 struct coro *coro;
1652 for (coro = coro_first; coro; coro = coro->next) 3479 for (coro = coro_first; coro; coro = coro->next)
1653 if (coro->hv) 3480 if (coro->hv)
… …
1658call (Coro::State coro, SV *coderef) 3485call (Coro::State coro, SV *coderef)
1659 ALIAS: 3486 ALIAS:
1660 eval = 1 3487 eval = 1
1661 CODE: 3488 CODE:
1662{ 3489{
1663 if (coro->mainstack) 3490 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1664 { 3491 {
1665 struct coro temp; 3492 struct coro *current = SvSTATE_current;
3493 struct CoroSLF slf_save;
1666 3494
1667 if (!(coro->flags & CF_RUNNING)) 3495 if (current != coro)
1668 { 3496 {
3497 PUTBACK;
1669 save_perl (aTHX_ &temp); 3498 save_perl (aTHX_ current);
1670 load_perl (aTHX_ coro); 3499 load_perl (aTHX_ coro);
3500 /* the coro is most likely in an active SLF call.
3501 * while not strictly required (the code we execute is
3502 * not allowed to call any SLF functions), it's cleaner
3503 * to reinitialise the slf_frame and restore it later.
3504 * This might one day allow us to actually do SLF calls
3505 * from code executed here.
3506 */
3507 slf_save = slf_frame;
3508 slf_frame.prepare = 0;
3509 SPAGAIN;
1671 } 3510 }
1672 3511
1673 { 3512 PUSHSTACK;
1674 dSP; 3513
1675 ENTER;
1676 SAVETMPS;
1677 PUSHMARK (SP); 3514 PUSHMARK (SP);
1678 PUTBACK; 3515 PUTBACK;
1679 3516
1680 if (ix) 3517 if (ix)
1681 eval_sv (coderef, 0); 3518 eval_sv (coderef, 0);
1682 else 3519 else
1683 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3520 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1684 3521
3522 POPSTACK;
1685 SPAGAIN; 3523 SPAGAIN;
1686 FREETMPS;
1687 LEAVE;
1688 PUTBACK;
1689 }
1690 3524
1691 if (!(coro->flags & CF_RUNNING)) 3525 if (current != coro)
1692 { 3526 {
3527 PUTBACK;
3528 slf_frame = slf_save;
1693 save_perl (aTHX_ coro); 3529 save_perl (aTHX_ coro);
1694 load_perl (aTHX_ &temp); 3530 load_perl (aTHX_ current);
3531 SPAGAIN;
1695 } 3532 }
1696 } 3533 }
1697} 3534}
1698 3535
1699SV * 3536SV *
… …
1701 PROTOTYPE: $ 3538 PROTOTYPE: $
1702 ALIAS: 3539 ALIAS:
1703 is_ready = CF_READY 3540 is_ready = CF_READY
1704 is_running = CF_RUNNING 3541 is_running = CF_RUNNING
1705 is_new = CF_NEW 3542 is_new = CF_NEW
1706 is_destroyed = CF_DESTROYED 3543 is_destroyed = CF_ZOMBIE
3544 is_zombie = CF_ZOMBIE
3545 is_suspended = CF_SUSPENDED
1707 CODE: 3546 CODE:
1708 RETVAL = boolSV (coro->flags & ix); 3547 RETVAL = boolSV (coro->flags & ix);
1709 OUTPUT: 3548 OUTPUT:
1710 RETVAL 3549 RETVAL
1711 3550
1712void 3551void
3552throw (Coro::State self, SV *exception = &PL_sv_undef)
3553 PROTOTYPE: $;$
3554 CODE:
3555{
3556 struct coro *current = SvSTATE_current;
3557 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3558 SvREFCNT_dec (*exceptionp);
3559 SvGETMAGIC (exception);
3560 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3561}
3562
3563void
1713api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3564api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3565 PROTOTYPE: $;$
3566 C_ARGS: aTHX_ coro, flags
1714 3567
1715SV * 3568SV *
1716has_stack (Coro::State coro) 3569has_cctx (Coro::State coro)
1717 PROTOTYPE: $ 3570 PROTOTYPE: $
1718 CODE: 3571 CODE:
1719 RETVAL = boolSV (!!coro->cctx); 3572 /* maybe manage the running flag differently */
3573 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1720 OUTPUT: 3574 OUTPUT:
1721 RETVAL 3575 RETVAL
1722 3576
1723int 3577int
1724is_traced (Coro::State coro) 3578is_traced (Coro::State coro)
… …
1726 CODE: 3580 CODE:
1727 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3581 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1728 OUTPUT: 3582 OUTPUT:
1729 RETVAL 3583 RETVAL
1730 3584
1731IV 3585UV
1732rss (Coro::State coro) 3586rss (Coro::State coro)
1733 PROTOTYPE: $ 3587 PROTOTYPE: $
1734 ALIAS: 3588 ALIAS:
1735 usecount = 1 3589 usecount = 1
1736 CODE: 3590 CODE:
… …
1740 case 1: RETVAL = coro->usecount; break; 3594 case 1: RETVAL = coro->usecount; break;
1741 } 3595 }
1742 OUTPUT: 3596 OUTPUT:
1743 RETVAL 3597 RETVAL
1744 3598
3599void
3600force_cctx ()
3601 PROTOTYPE:
3602 CODE:
3603 cctx_current->idle_sp = 0;
3604
3605void
3606swap_defsv (Coro::State self)
3607 PROTOTYPE: $
3608 ALIAS:
3609 swap_defav = 1
3610 CODE:
3611 if (!self->slot)
3612 croak ("cannot swap state with coroutine that has no saved state,");
3613 else
3614 {
3615 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3616 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3617
3618 SV *tmp = *src; *src = *dst; *dst = tmp;
3619 }
3620
3621void
3622cancel (Coro::State self)
3623 CODE:
3624 coro_state_destroy (aTHX_ self);
3625
3626SV *
3627enable_times (int enabled = enable_times)
3628 CODE:
3629{
3630 RETVAL = boolSV (enable_times);
3631
3632 if (enabled != enable_times)
3633 {
3634 enable_times = enabled;
3635
3636 coro_times_update ();
3637 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3638 }
3639}
3640 OUTPUT:
3641 RETVAL
3642
3643void
3644times (Coro::State self)
3645 PPCODE:
3646{
3647 struct coro *current = SvSTATE (coro_current);
3648
3649 if (ecb_expect_false (current == self))
3650 {
3651 coro_times_update ();
3652 coro_times_add (SvSTATE (coro_current));
3653 }
3654
3655 EXTEND (SP, 2);
3656 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3657 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3658
3659 if (ecb_expect_false (current == self))
3660 coro_times_sub (SvSTATE (coro_current));
3661}
3662
3663void
3664swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3665 CODE:
3666{
3667 struct coro *current = SvSTATE_current;
3668
3669 if (current == coro)
3670 SWAP_SVS (current);
3671
3672 if (!coro->swap_sv)
3673 coro->swap_sv = newAV ();
3674
3675 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3676 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3677
3678 if (current == coro)
3679 SWAP_SVS (current);
3680}
3681
1745 3682
1746MODULE = Coro::State PACKAGE = Coro 3683MODULE = Coro::State PACKAGE = Coro
1747 3684
1748BOOT: 3685BOOT:
1749{ 3686{
1750 int i;
1751
1752 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE); 3687 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1753 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE); 3688 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3689 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3690 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1754 av_async_pool = coro_get_av ("Coro::async_pool", TRUE); 3691 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3692 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3693 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3694 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1755 3695
1756 coro_current = coro_get_sv ("Coro::current", FALSE); 3696 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1757 SvREADONLY_on (coro_current); 3697 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1758 3698 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3699 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3700
1759 coro_stash = gv_stashpv ("Coro", TRUE); 3701 coro_stash = gv_stashpv ("Coro", TRUE);
1760 3702
1761 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3703 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1762 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3704 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1763 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3705 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1764 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3706 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1765 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3707 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1766 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3708 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1767
1768 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1769 coro_ready[i] = newAV ();
1770 3709
1771 { 3710 {
1772 SV *sv = perl_get_sv ("Coro::API", TRUE); 3711 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1773 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1774 3712
1775 coroapi.schedule = api_schedule; 3713 coroapi.schedule = api_schedule;
3714 coroapi.schedule_to = api_schedule_to;
1776 coroapi.cede = api_cede; 3715 coroapi.cede = api_cede;
1777 coroapi.cede_notself = api_cede_notself; 3716 coroapi.cede_notself = api_cede_notself;
1778 coroapi.ready = api_ready; 3717 coroapi.ready = api_ready;
1779 coroapi.is_ready = api_is_ready; 3718 coroapi.is_ready = api_is_ready;
1780 coroapi.nready = &coro_nready; 3719 coroapi.nready = coro_nready;
1781 coroapi.current = coro_current; 3720 coroapi.current = coro_current;
1782 3721
1783 GCoroAPI = &coroapi; 3722 /*GCoroAPI = &coroapi;*/
1784 sv_setiv (sv, (IV)&coroapi); 3723 sv_setiv (sv, (IV)&coroapi);
1785 SvREADONLY_on (sv); 3724 SvREADONLY_on (sv);
1786 } 3725 }
1787} 3726}
3727
3728SV *
3729async (...)
3730 PROTOTYPE: &@
3731 CODE:
3732 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3733 api_ready (aTHX_ RETVAL);
3734 OUTPUT:
3735 RETVAL
3736
3737void
3738_destroy (Coro::State coro)
3739 CODE:
3740 /* used by the manager thread */
3741 coro_state_destroy (aTHX_ coro);
3742
3743void
3744on_destroy (Coro::State coro, SV *cb)
3745 CODE:
3746 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3747
3748void
3749join (...)
3750 CODE:
3751 CORO_EXECUTE_SLF_XS (slf_init_join);
3752
3753void
3754terminate (...)
3755 CODE:
3756 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3757
3758void
3759cancel (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3762
3763int
3764safe_cancel (Coro::State self, ...)
3765 C_ARGS: aTHX_ self, &ST (1), items - 1
3766
3767void
3768schedule (...)
3769 CODE:
3770 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3771
3772void
3773schedule_to (...)
3774 CODE:
3775 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3776
3777void
3778cede_to (...)
3779 CODE:
3780 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3781
3782void
3783cede (...)
3784 CODE:
3785 CORO_EXECUTE_SLF_XS (slf_init_cede);
3786
3787void
3788cede_notself (...)
3789 CODE:
3790 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1788 3791
1789void 3792void
1790_set_current (SV *current) 3793_set_current (SV *current)
1791 PROTOTYPE: $ 3794 PROTOTYPE: $
1792 CODE: 3795 CODE:
1793 SvREFCNT_dec (SvRV (coro_current)); 3796 SvREFCNT_dec (SvRV (coro_current));
1794 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3797 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3798
3799void
3800_set_readyhook (SV *hook)
3801 PROTOTYPE: $
3802 CODE:
3803 SvREFCNT_dec (coro_readyhook);
3804 SvGETMAGIC (hook);
3805 if (SvOK (hook))
3806 {
3807 coro_readyhook = newSVsv (hook);
3808 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3809 }
3810 else
3811 {
3812 coro_readyhook = 0;
3813 CORO_READYHOOK = 0;
3814 }
1795 3815
1796int 3816int
1797prio (Coro::State coro, int newprio = 0) 3817prio (Coro::State coro, int newprio = 0)
3818 PROTOTYPE: $;$
1798 ALIAS: 3819 ALIAS:
1799 nice = 1 3820 nice = 1
1800 CODE: 3821 CODE:
1801{ 3822{
1802 RETVAL = coro->prio; 3823 RETVAL = coro->prio;
… …
1804 if (items > 1) 3825 if (items > 1)
1805 { 3826 {
1806 if (ix) 3827 if (ix)
1807 newprio = coro->prio - newprio; 3828 newprio = coro->prio - newprio;
1808 3829
1809 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3830 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1810 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3831 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1811 3832
1812 coro->prio = newprio; 3833 coro->prio = newprio;
1813 } 3834 }
1814} 3835}
1815 OUTPUT: 3836 OUTPUT:
… …
1817 3838
1818SV * 3839SV *
1819ready (SV *self) 3840ready (SV *self)
1820 PROTOTYPE: $ 3841 PROTOTYPE: $
1821 CODE: 3842 CODE:
1822 RETVAL = boolSV (api_ready (self)); 3843 RETVAL = boolSV (api_ready (aTHX_ self));
1823 OUTPUT: 3844 OUTPUT:
1824 RETVAL 3845 RETVAL
1825 3846
1826int 3847int
1827nready (...) 3848nready (...)
… …
1830 RETVAL = coro_nready; 3851 RETVAL = coro_nready;
1831 OUTPUT: 3852 OUTPUT:
1832 RETVAL 3853 RETVAL
1833 3854
1834void 3855void
1835throw (Coro::State self, SV *throw = &PL_sv_undef) 3856suspend (Coro::State self)
1836 PROTOTYPE: $;$ 3857 PROTOTYPE: $
1837 CODE: 3858 CODE:
1838 SvREFCNT_dec (self->throw); 3859 self->flags |= CF_SUSPENDED;
1839 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1840 3860
1841# for async_pool speedup
1842void 3861void
1843_pool_1 (SV *cb) 3862resume (Coro::State self)
3863 PROTOTYPE: $
1844 CODE: 3864 CODE:
1845{ 3865 self->flags &= ~CF_SUSPENDED;
1846 struct coro *coro = SvSTATE (coro_current);
1847 HV *hv = (HV *)SvRV (coro_current);
1848 AV *defav = GvAV (PL_defgv);
1849 SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
1850 AV *invoke_av;
1851 int i, len;
1852 3866
1853 if (!invoke) 3867void
1854 croak ("\3async_pool terminate\2\n"); 3868_pool_handler (...)
3869 CODE:
3870 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1855 3871
1856 SvREFCNT_dec (coro->saved_deffh); 3872void
1857 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3873async_pool (SV *cv, ...)
3874 PROTOTYPE: &@
3875 PPCODE:
3876{
3877 HV *hv = (HV *)av_pop (av_async_pool);
3878 AV *av = newAV ();
3879 SV *cb = ST (0);
3880 int i;
1858 3881
1859 hv_store (hv, "desc", sizeof ("desc") - 1, 3882 av_extend (av, items - 2);
1860 newSVpvn (strpair ("[async_pool]")), 0); 3883 for (i = 1; i < items; ++i)
3884 av_push (av, SvREFCNT_inc_NN (ST (i)));
1861 3885
1862 invoke_av = (AV *)SvRV (invoke); 3886 if ((SV *)hv == &PL_sv_undef)
1863 len = av_len (invoke_av);
1864
1865 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1866
1867 if (len > 0)
1868 { 3887 {
1869 av_fill (defav, len - 1); 3888 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1870 for (i = 0; i < len; ++i) 3889 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1871 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3890 SvREFCNT_dec (sv);
1872 } 3891 }
1873 3892
3893 {
3894 struct coro *coro = SvSTATE_hv (hv);
3895
3896 assert (!coro->invoke_cb);
3897 assert (!coro->invoke_av);
3898 coro->invoke_cb = SvREFCNT_inc (cb);
3899 coro->invoke_av = av;
3900 }
3901
3902 api_ready (aTHX_ (SV *)hv);
3903
3904 if (GIMME_V != G_VOID)
3905 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3906 else
1874 SvREFCNT_dec (invoke); 3907 SvREFCNT_dec (hv);
1875} 3908}
1876 3909
1877void 3910SV *
1878_pool_2 (SV *cb) 3911rouse_cb ()
3912 PROTOTYPE:
1879 CODE: 3913 CODE:
1880{ 3914 RETVAL = coro_new_rouse_cb (aTHX);
1881 struct coro *coro = SvSTATE (coro_current);
1882
1883 sv_setsv (cb, &PL_sv_undef);
1884
1885 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1886 coro->saved_deffh = 0;
1887
1888 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1889 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1890 croak ("\3async_pool terminate\2\n");
1891
1892 av_clear (GvAV (PL_defgv));
1893 hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
1894 newSVpvn (strpair ("[async_pool idle]")), 0);
1895
1896 coro->prio = 0;
1897
1898 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1899 api_trace (coro_current, 0);
1900
1901 av_push (av_async_pool, newSVsv (coro_current));
1902}
1903
1904
1905MODULE = Coro::State PACKAGE = Coro::AIO
1906
1907SV *
1908_get_state ()
1909 CODE:
1910{
1911 struct io_state *data;
1912
1913 RETVAL = newSV (sizeof (struct io_state));
1914 data = (struct io_state *)SvPVX (RETVAL);
1915 SvCUR_set (RETVAL, sizeof (struct io_state));
1916 SvPOK_only (RETVAL);
1917
1918 data->errorno = errno;
1919 data->laststype = PL_laststype;
1920 data->laststatval = PL_laststatval;
1921 data->statcache = PL_statcache;
1922}
1923 OUTPUT: 3915 OUTPUT:
1924 RETVAL 3916 RETVAL
1925 3917
1926void 3918void
1927_set_state (char *data_) 3919rouse_wait (...)
3920 PROTOTYPE: ;$
3921 PPCODE:
3922 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3923
3924void
3925on_enter (SV *block)
3926 ALIAS:
3927 on_leave = 1
1928 PROTOTYPE: $ 3928 PROTOTYPE: &
1929 CODE: 3929 CODE:
1930{ 3930{
1931 struct io_state *data = (void *)data_; 3931 struct coro *coro = SvSTATE_current;
3932 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1932 3933
1933 errno = data->errorno; 3934 block = s_get_cv_croak (block);
1934 PL_laststype = data->laststype;
1935 PL_laststatval = data->laststatval;
1936 PL_statcache = data->statcache;
1937}
1938 3935
3936 if (!*avp)
3937 *avp = newAV ();
3938
3939 av_push (*avp, SvREFCNT_inc (block));
3940
3941 if (!ix)
3942 on_enterleave_call (aTHX_ block);
3943
3944 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3945 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3946 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3947}
3948
3949
3950MODULE = Coro::State PACKAGE = PerlIO::cede
3951
3952BOOT:
3953 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3954
3955
3956MODULE = Coro::State PACKAGE = Coro::Semaphore
3957
3958SV *
3959new (SV *klass, SV *count = 0)
3960 CODE:
3961{
3962 int semcnt = 1;
3963
3964 if (count)
3965 {
3966 SvGETMAGIC (count);
3967
3968 if (SvOK (count))
3969 semcnt = SvIV (count);
3970 }
3971
3972 RETVAL = sv_bless (
3973 coro_waitarray_new (aTHX_ semcnt),
3974 GvSTASH (CvGV (cv))
3975 );
3976}
3977 OUTPUT:
3978 RETVAL
3979
3980# helper for Coro::Channel and others
3981SV *
3982_alloc (int count)
3983 CODE:
3984 RETVAL = coro_waitarray_new (aTHX_ count);
3985 OUTPUT:
3986 RETVAL
3987
3988SV *
3989count (SV *self)
3990 CODE:
3991 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3992 OUTPUT:
3993 RETVAL
3994
3995void
3996up (SV *self, int adjust = 1)
3997 ALIAS:
3998 adjust = 1
3999 CODE:
4000 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4001
4002void
4003down (...)
4004 CODE:
4005 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4006
4007void
4008wait (...)
4009 CODE:
4010 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4011
4012void
4013try (SV *self)
4014 PPCODE:
4015{
4016 AV *av = (AV *)SvRV (self);
4017 SV *count_sv = AvARRAY (av)[0];
4018 IV count = SvIVX (count_sv);
4019
4020 if (count > 0)
4021 {
4022 --count;
4023 SvIVX (count_sv) = count;
4024 XSRETURN_YES;
4025 }
4026 else
4027 XSRETURN_NO;
4028}
4029
4030void
4031waiters (SV *self)
4032 PPCODE:
4033{
4034 AV *av = (AV *)SvRV (self);
4035 int wcount = AvFILLp (av) + 1 - 1;
4036
4037 if (GIMME_V == G_SCALAR)
4038 XPUSHs (sv_2mortal (newSViv (wcount)));
4039 else
4040 {
4041 int i;
4042 EXTEND (SP, wcount);
4043 for (i = 1; i <= wcount; ++i)
4044 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4045 }
4046}
4047
4048MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4049
4050void
4051_may_delete (SV *sem, int count, int extra_refs)
4052 PPCODE:
4053{
4054 AV *av = (AV *)SvRV (sem);
4055
4056 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4057 && AvFILLp (av) == 0 /* no waiters, just count */
4058 && SvIV (AvARRAY (av)[0]) == count)
4059 XSRETURN_YES;
4060
4061 XSRETURN_NO;
4062}
4063
4064MODULE = Coro::State PACKAGE = Coro::Signal
4065
4066SV *
4067new (SV *klass)
4068 CODE:
4069 RETVAL = sv_bless (
4070 coro_waitarray_new (aTHX_ 0),
4071 GvSTASH (CvGV (cv))
4072 );
4073 OUTPUT:
4074 RETVAL
4075
4076void
4077wait (...)
4078 CODE:
4079 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4080
4081void
4082broadcast (SV *self)
4083 CODE:
4084{
4085 AV *av = (AV *)SvRV (self);
4086 coro_signal_wake (aTHX_ av, AvFILLp (av));
4087}
4088
4089void
4090send (SV *self)
4091 CODE:
4092{
4093 AV *av = (AV *)SvRV (self);
4094
4095 if (AvFILLp (av))
4096 coro_signal_wake (aTHX_ av, 1);
4097 else
4098 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4099}
4100
4101IV
4102awaited (SV *self)
4103 CODE:
4104 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4105 OUTPUT:
4106 RETVAL
4107
4108
4109MODULE = Coro::State PACKAGE = Coro::AnyEvent
4110
4111BOOT:
4112 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4113
4114void
4115_schedule (...)
4116 CODE:
4117{
4118 static int incede;
4119
4120 api_cede_notself (aTHX);
4121
4122 ++incede;
4123 while (coro_nready >= incede && api_cede (aTHX))
4124 ;
4125
4126 sv_setsv (sv_activity, &PL_sv_undef);
4127 if (coro_nready >= incede)
4128 {
4129 PUSHMARK (SP);
4130 PUTBACK;
4131 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4132 }
4133
4134 --incede;
4135}
4136
4137
4138MODULE = Coro::State PACKAGE = Coro::AIO
4139
4140void
4141_register (char *target, char *proto, SV *req)
4142 CODE:
4143{
4144 SV *req_cv = s_get_cv_croak (req);
4145 /* newXSproto doesn't return the CV on 5.8 */
4146 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4147 sv_setpv ((SV *)slf_cv, proto);
4148 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4149}
4150
4151MODULE = Coro::State PACKAGE = Coro::Select
4152
4153void
4154patch_pp_sselect ()
4155 CODE:
4156 if (!coro_old_pp_sselect)
4157 {
4158 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4159 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4160 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4161 }
4162
4163void
4164unpatch_pp_sselect ()
4165 CODE:
4166 if (coro_old_pp_sselect)
4167 {
4168 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4169 coro_old_pp_sselect = 0;
4170 }
4171

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