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Comparing Coro/Coro/State.xs (file contents):
Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC vs.
Revision 1.364 by root, Thu Jul 16 02:19:17 2009 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "schmorp.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
45#include <assert.h> 15#include <assert.h>
46 16
47#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
48# undef STACKGUARD 18# undef setjmp
49#endif 19# undef longjmp
50 20# undef _exit
51#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
52# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
53#endif 24#endif
54 25
55#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
56# include <unistd.h> 27# include <unistd.h>
57# include <sys/mman.h> 28# include <sys/mman.h>
… …
73#else 44#else
74# define PAGESIZE 0 45# define PAGESIZE 0
75# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
76#endif 47#endif
77 48
78/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
79 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
80 * and should be unique. */ 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
81#define dSTACKLEVEL int stacklevel 72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
82#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
83 78
84#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
85 80
86#if __GNUC__ >= 3 81#if __GNUC__ >= 3
87# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
88#else 85#else
89# define attribute(x) 86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
90#endif 89#endif
91 90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
92#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
93 95
94#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
95 98
96#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
97static perl_mutex coro_mutex; 100# if CORO_PTHREAD
98# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
99# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
100#else
101# define LOCK (void)0
102# define UNLOCK (void)0
103#endif 103#endif
104 104
105struct io_state 105#ifdef __linux
106{ 106# include <time.h> /* for timespec */
107 int errorno; 107# include <syscall.h> /* for SYS_* */
108 I32 laststype; 108# ifdef SYS_clock_gettime
109 int laststatval; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110 Stat_t statcache; 110# define CORO_CLOCK_MONOTONIC 1
111}; 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
112 114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
123static size_t cctx_stacksize = CORO_STACKSIZE;
113static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
114static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
126static JMPENV *main_top_env;
115static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
116static SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
129
130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147static CV *cv_coro_state_new;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
117 157
118static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
119static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
120 160
161enum {
162 CC_MAPPED = 0x01,
163 CC_NOREUSE = 0x02, /* throw this away after tracing */
164 CC_TRACE = 0x04,
165 CC_TRACE_SUB = 0x08, /* trace sub calls */
166 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168};
169
121/* this is a structure representing a c-level coroutine */ 170/* this is a structure representing a c-level coroutine */
122typedef struct coro_cctx { 171typedef struct coro_cctx
172{
123 struct coro_cctx *next; 173 struct coro_cctx *next;
124 174
125 /* the stack */ 175 /* the stack */
126 void *sptr; 176 void *sptr;
127 long ssize; /* positive == mmap, otherwise malloc */ 177 size_t ssize;
128 178
129 /* cpu state */ 179 /* cpu state */
130 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
131 JMPENV *top_env; 182 JMPENV *top_env;
132 coro_context cctx; 183 coro_context cctx;
133 184
134 int inuse; 185 U32 gen;
135
136#if USE_VALGRIND 186#if CORO_USE_VALGRIND
137 int valgrind_id; 187 int valgrind_id;
138#endif 188#endif
189 unsigned char flags;
139} coro_cctx; 190} coro_cctx;
140 191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
141enum { 196enum {
142 CF_RUNNING = 0x0001, /* coroutine is running */ 197 CF_RUNNING = 0x0001, /* coroutine is running */
143 CF_READY = 0x0002, /* coroutine is ready */ 198 CF_READY = 0x0002, /* coroutine is ready */
144 CF_NEW = 0x0004, /* ahs never been switched to */ 199 CF_NEW = 0x0004, /* has never been switched to */
200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
201 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
145}; 202};
146 203
147/* this is a structure representing a perl-level coroutine */ 204/* the structure where most of the perl state is stored, overlaid on the cxstack */
148struct coro { 205typedef struct
149 /* the c coroutine allocated to this perl coroutine, if any */ 206{
150 coro_cctx *cctx; 207 SV *defsv;
151 208 AV *defav;
152 /* data associated with this coroutine (initial args) */ 209 SV *errsv;
153 AV *args; 210 SV *irsgv;
154 int refcnt; 211 HV *hinthv;
155 int save; /* CORO_SAVE flags */
156 int flags; /* CF_ flags */
157
158 /* optionally saved, might be zero */
159 AV *defav; /* @_ */
160 SV *defsv; /* $_ */
161 SV *errsv; /* $@ */
162 SV *irssv; /* $/ */
163 SV *irssv_sv; /* real $/ cache */
164
165#define VAR(name,type) type name; 212#define VAR(name,type) type name;
166# include "state.h" 213# include "state.h"
167#undef VAR 214#undef VAR
215} perl_slots;
216
217#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
218
219/* this is a structure representing a perl-level coroutine */
220struct coro {
221 /* the C coroutine allocated to this perl coroutine, if any */
222 coro_cctx *cctx;
223
224 /* ready queue */
225 struct coro *next_ready;
226
227 /* state data */
228 struct CoroSLF slf_frame; /* saved slf frame */
229 AV *mainstack;
230 perl_slots *slot; /* basically the saved sp */
231
232 CV *startcv; /* the CV to execute */
233 AV *args; /* data associated with this coroutine (initial args) */
234 int refcnt; /* coroutines are refcounted, yes */
235 int flags; /* CF_ flags */
236 HV *hv; /* the perl hash associated with this coro, if any */
237 void (*on_destroy)(pTHX_ struct coro *coro);
238
239 /* statistics */
240 int usecount; /* number of transfers to this coro */
168 241
169 /* coro process data */ 242 /* coro process data */
170 int prio; 243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb;
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* times */
257 coro_ts t_cpu, t_real;
258
259 /* linked list */
260 struct coro *next, *prev;
171}; 261};
172 262
173typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
174typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
175 265
266/* the following variables are effectively part of the perl context */
267/* and get copied between struct coro and these variables */
268/* the mainr easonw e don't support windows process emulation */
269static struct CoroSLF slf_frame; /* the current slf frame */
270
271/** Coro ********************************************************************/
272
273#define CORO_PRIO_MAX 3
274#define CORO_PRIO_HIGH 1
275#define CORO_PRIO_NORMAL 0
276#define CORO_PRIO_LOW -1
277#define CORO_PRIO_IDLE -3
278#define CORO_PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
284static CV *cv_coro_run, *cv_coro_terminate;
285static struct coro *coro_first;
286#define coro_nready coroapi.nready
287
288/** Coro::Select ************************************************************/
289
290static OP *(*coro_old_pp_sselect) (pTHX);
291static SV *coro_select_select;
292
293/* horrible hack, but if it works... */
294static OP *
295coro_pp_sselect (aTHX)
296{
297 dSP;
298 PUSHMARK (SP - 4); /* fake argument list */
299 XPUSHs (coro_select_select);
300 PUTBACK;
301
302 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
303 PL_op->op_flags |= OPf_STACKED;
304 PL_op->op_private = 0;
305 return PL_ppaddr [OP_ENTERSUB](aTHX);
306}
307
308/** lowlevel stuff **********************************************************/
309
310static SV *
311coro_get_sv (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_sv (name, create);
316#endif
317 return get_sv (name, create);
318}
319
176static AV * 320static AV *
321coro_get_av (pTHX_ const char *name, int create)
322{
323#if PERL_VERSION_ATLEAST (5,10,0)
324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
325 get_av (name, create);
326#endif
327 return get_av (name, create);
328}
329
330static HV *
331coro_get_hv (pTHX_ const char *name, int create)
332{
333#if PERL_VERSION_ATLEAST (5,10,0)
334 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
335 get_hv (name, create);
336#endif
337 return get_hv (name, create);
338}
339
340INLINE void
341coro_times_update ()
342{
343#ifdef coro_clock_gettime
344 struct timespec ts;
345
346 ts.tv_sec = ts.tv_nsec = 0;
347 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
348 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
349
350 ts.tv_sec = ts.tv_nsec = 0;
351 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
352 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
353#else
354 dTHX;
355 UV tv[2];
356
357 u2time (aTHX_ tv);
358 time_real [0] = tv [0];
359 time_real [1] = tv [1] * 1000;
360#endif
361}
362
363INLINE void
364coro_times_add (struct coro *c)
365{
366 c->t_real [1] += time_real [1];
367 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
368 c->t_real [0] += time_real [0];
369
370 c->t_cpu [1] += time_cpu [1];
371 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
372 c->t_cpu [0] += time_cpu [0];
373}
374
375INLINE void
376coro_times_sub (struct coro *c)
377{
378 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
379 c->t_real [1] -= time_real [1];
380 c->t_real [0] -= time_real [0];
381
382 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
383 c->t_cpu [1] -= time_cpu [1];
384 c->t_cpu [0] -= time_cpu [0];
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
439static AV *
177coro_clone_padlist (CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
178{ 441{
179 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
180 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
181 444
182 newpadlist = newAV (); 445 newpadlist = newAV ();
183 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
184#if PERL_VERSION_ATLEAST (5,9,0) 447#if PERL_VERSION_ATLEAST (5,10,0)
185 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 448 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
186#else 449#else
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
188#endif 451#endif
189 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
190 --AvFILLp (padlist); 453 --AvFILLp (padlist);
191 454
192 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
193 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
194 457
195 return newpadlist; 458 return newpadlist;
196} 459}
197 460
198static void 461static void
199free_padlist (AV *padlist) 462free_padlist (pTHX_ AV *padlist)
200{ 463{
201 /* may be during global destruction */ 464 /* may be during global destruction */
202 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
203 { 466 {
204 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
205 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
206 { 470 {
207 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
208 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
209 { 473 I32 j = AvFILLp (av);
210 SV *sv; 474
211 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
212 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
213
214 SvREFCNT_dec (*svp);
215 }
216 } 480 }
217 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
218 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
219 } 486 }
220} 487}
221 488
222static int 489static int
223coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
224{ 491{
225 AV *padlist; 492 AV *padlist;
226 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
227 494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return 0;
498
228 /* casting is fun. */ 499 /* casting is fun. */
229 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
230 free_padlist (padlist); 501 free_padlist (aTHX_ padlist);
231 502
232 SvREFCNT_dec (av); 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
233 504
234 return 0; 505 return 0;
235} 506}
236 507
237#define PERL_MAGIC_coro PERL_MAGIC_ext 508static MGVTBL coro_cv_vtbl = {
238 509 0, 0, 0, 0,
239static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 510 coro_cv_free
240 511};
241#define CORO_MAGIC(cv) \
242 SvMAGIC (cv) \
243 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
244 ? SvMAGIC (cv) \
245 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
246 : 0
247 512
248/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
249static void 514static void
250get_padlist (CV *cv) 515get_padlist (pTHX_ CV *cv)
251{ 516{
252 MAGIC *mg = CORO_MAGIC (cv); 517 MAGIC *mg = CORO_MAGIC_cv (cv);
253 AV *av; 518 AV *av;
254 519
255 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
256 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257 else 522 else
258 { 523 {
259#if 0 524#if CORO_PREFER_PERL_FUNCTIONS
260 /* this is probably cleaner, but also slower? */ 525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
261 CV *cp = Perl_cv_clone (cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
262 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
263 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
264 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
265#else 531#else
266 CvPADLIST (cv) = coro_clone_padlist (cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
267#endif 533#endif
268 } 534 }
269} 535}
270 536
271static void 537static void
272put_padlist (CV *cv) 538put_padlist (pTHX_ CV *cv)
273{ 539{
274 MAGIC *mg = CORO_MAGIC (cv); 540 MAGIC *mg = CORO_MAGIC_cv (cv);
275 AV *av; 541 AV *av;
276 542
277 if (!mg) 543 if (expect_false (!mg))
278 { 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
279 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
280 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
281 mg->mg_virtual = &vtbl_coro;
282 mg->mg_obj = (SV *)newAV ();
283 }
284 545
285 av = (AV *)mg->mg_obj; 546 av = (AV *)mg->mg_obj;
286 547
287 if (AvFILLp (av) >= AvMAX (av)) 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
288 av_extend (av, AvMAX (av) + 1); 549 av_extend (av, AvFILLp (av) + 1);
289 550
290 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
291} 552}
292 553
293#define SB do { 554/** load & save, init *******************************************************/
294#define SE } while (0)
295 555
296#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
297
298static void 556static void
557on_enterleave_call (pTHX_ SV *cb);
558
559static void
299load_perl (Coro__State c) 560load_perl (pTHX_ Coro__State c)
300{ 561{
562 perl_slots *slot = c->slot;
563 c->slot = 0;
564
565 PL_mainstack = c->mainstack;
566
567 GvSV (PL_defgv) = slot->defsv;
568 GvAV (PL_defgv) = slot->defav;
569 GvSV (PL_errgv) = slot->errsv;
570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
572
301#define VAR(name,type) PL_ ## name = c->name; 573 #define VAR(name,type) PL_ ## name = slot->name;
302# include "state.h" 574 # include "state.h"
303#undef VAR 575 #undef VAR
304
305 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
306 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
307 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
308 if (c->irssv)
309 {
310 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
311 SvREFCNT_dec (c->irssv);
312 else
313 {
314 REPLACE_SV (PL_rs, c->irssv);
315 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
316 sv_setsv (c->irssv_sv, PL_rs);
317 }
318 }
319 576
320 { 577 {
321 dSP; 578 dSP;
579
322 CV *cv; 580 CV *cv;
323 581
324 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
325 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
326 { 584 {
327 put_padlist (cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
328 CvDEPTH (cv) = PTR2IV (POPs); 586 CvDEPTH (cv) = PTR2IV (POPs);
329 CvPADLIST (cv) = (AV *)POPs; 587 CvPADLIST (cv) = (AV *)POPs;
330 } 588 }
331 589
332 PUTBACK; 590 PUTBACK;
333 } 591 }
334}
335 592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (enable_times))
597 {
598 if (expect_false (!times_valid))
599 coro_times_update ();
600
601 coro_times_sub (c);
602 }
603
604 if (expect_false (c->on_enter))
605 {
606 int i;
607
608 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
610 }
611}
612
336static void 613static void
337save_perl (Coro__State c) 614save_perl (pTHX_ Coro__State c)
338{ 615{
616 if (expect_false (c->on_leave))
617 {
618 int i;
619
620 for (i = AvFILLp (c->on_leave); i >= 0; --i)
621 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
622 }
623
624 times_valid = 0;
625
626 if (expect_false (enable_times))
627 {
628 coro_times_update (); times_valid = 1;
629 coro_times_add (c);
630 }
631
632 c->except = CORO_THROW;
633 c->slf_frame = slf_frame;
634
339 { 635 {
340 dSP; 636 dSP;
341 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
345 /* 641 /*
346 * the worst thing you can imagine happens first - we have to save 642 * the worst thing you can imagine happens first - we have to save
347 * (and reinitialize) all cv's in the whole callchain :( 643 * (and reinitialize) all cv's in the whole callchain :(
348 */ 644 */
349 645
350 PUSHs (Nullsv); 646 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 647 /* this loop was inspired by pp_caller */
352 for (;;) 648 for (;;)
353 { 649 {
354 while (cxix >= 0) 650 while (expect_true (cxix >= 0))
355 { 651 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
357 653
358 if (CxTYPE (cx) == CXt_SUB) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
359 { 655 {
360 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
361 657
362 if (CvDEPTH (cv)) 658 if (expect_true (CvDEPTH (cv)))
363 { 659 {
364 EXTEND (SP, 3); 660 EXTEND (SP, 3);
365
366 PUSHs ((SV *)CvPADLIST (cv)); 661 PUSHs ((SV *)CvPADLIST (cv));
367 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 662 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
368 PUSHs ((SV *)cv); 663 PUSHs ((SV *)cv);
369 664
370 CvDEPTH (cv) = 0; 665 CvDEPTH (cv) = 0;
371 get_padlist (cv); 666 get_padlist (aTHX_ cv);
372 } 667 }
373 } 668 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE (cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 669 }
383 670
384 if (top_si->si_type == PERLSI_MAIN) 671 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 672 break;
386 673
387 top_si = top_si->si_prev; 674 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 675 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 676 cxix = top_si->si_cxix;
390 } 677 }
391 678
392 PUTBACK; 679 PUTBACK;
393 } 680 }
394 681
395 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 682 /* allocate some space on the context stack for our purposes */
396 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 683 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 684 if (SLOT_COUNT >= 1) CXINC;
398 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 685 if (SLOT_COUNT >= 2) CXINC;
686 if (SLOT_COUNT >= 3) CXINC;
687 {
688 unsigned int i;
689 for (i = 3; i < SLOT_COUNT; ++i)
690 CXINC;
691 }
692 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 693
694 c->mainstack = PL_mainstack;
695
696 {
697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
698
699 slot->defav = GvAV (PL_defgv);
700 slot->defsv = DEFSV;
701 slot->errsv = ERRSV;
702 slot->irsgv = GvSV (irsgv);
703 slot->hinthv = GvHV (PL_hintgv);
704
400#define VAR(name,type)c->name = PL_ ## name; 705 #define VAR(name,type) slot->name = PL_ ## name;
401# include "state.h" 706 # include "state.h"
402#undef VAR 707 #undef VAR
708 }
403} 709}
404 710
405/* 711/*
406 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
407 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
408 * on the (sometimes correct) assumption that coroutines do 714 * on the (sometimes correct) assumption that coroutines do
409 * not usually need a lot of stackspace. 715 * not usually need a lot of stackspace.
410 */ 716 */
717#if CORO_PREFER_PERL_FUNCTIONS
718# define coro_init_stacks(thx) init_stacks ()
719#else
411static void 720static void
412coro_init_stacks () 721coro_init_stacks (pTHX)
413{ 722{
414 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 723 PL_curstackinfo = new_stackinfo(32, 8);
415 PL_curstackinfo->si_type = PERLSI_MAIN; 724 PL_curstackinfo->si_type = PERLSI_MAIN;
416 PL_curstack = PL_curstackinfo->si_stack; 725 PL_curstack = PL_curstackinfo->si_stack;
417 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 726 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
418 727
419 PL_stack_base = AvARRAY(PL_curstack); 728 PL_stack_base = AvARRAY(PL_curstack);
420 PL_stack_sp = PL_stack_base; 729 PL_stack_sp = PL_stack_base;
421 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 730 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
422 731
423 New(50,PL_tmps_stack,128,SV*); 732 New(50,PL_tmps_stack,32,SV*);
424 PL_tmps_floor = -1; 733 PL_tmps_floor = -1;
425 PL_tmps_ix = -1; 734 PL_tmps_ix = -1;
426 PL_tmps_max = 128; 735 PL_tmps_max = 32;
427 736
428 New(54,PL_markstack,32,I32); 737 New(54,PL_markstack,16,I32);
429 PL_markstack_ptr = PL_markstack; 738 PL_markstack_ptr = PL_markstack;
430 PL_markstack_max = PL_markstack + 32; 739 PL_markstack_max = PL_markstack + 16;
431 740
432#ifdef SET_MARK_OFFSET 741#ifdef SET_MARK_OFFSET
433 SET_MARK_OFFSET; 742 SET_MARK_OFFSET;
434#endif 743#endif
435 744
436 New(54,PL_scopestack,32,I32); 745 New(54,PL_scopestack,8,I32);
437 PL_scopestack_ix = 0; 746 PL_scopestack_ix = 0;
438 PL_scopestack_max = 32; 747 PL_scopestack_max = 8;
439 748
440 New(54,PL_savestack,64,ANY); 749 New(54,PL_savestack,24,ANY);
441 PL_savestack_ix = 0; 750 PL_savestack_ix = 0;
442 PL_savestack_max = 64; 751 PL_savestack_max = 24;
443 752
444#if !PERL_VERSION_ATLEAST (5,9,0) 753#if !PERL_VERSION_ATLEAST (5,10,0)
445 New(54,PL_retstack,16,OP*); 754 New(54,PL_retstack,4,OP*);
446 PL_retstack_ix = 0; 755 PL_retstack_ix = 0;
447 PL_retstack_max = 16; 756 PL_retstack_max = 4;
448#endif 757#endif
449} 758}
759#endif
450 760
451/* 761/*
452 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
453 */ 763 */
454static void 764static void
455coro_destroy_stacks () 765coro_destruct_stacks (pTHX)
456{ 766{
457 if (!IN_DESTRUCT)
458 {
459 /* is this ugly, I ask? */
460 LEAVE_SCOPE (0);
461
462 /* sure it is, but more important: is it correct?? :/ */
463 FREETMPS;
464
465 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
466 }
467
468 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
469 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
470 769
471 while (PL_curstackinfo) 770 while (PL_curstackinfo)
472 { 771 {
473 PERL_SI *p = PL_curstackinfo->si_prev; 772 PERL_SI *p = PL_curstackinfo->si_prev;
474 773
475 { /*D*//*remove*/
476 dSP;
477 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
478 PUTBACK; /* possibly superfluous */
479 }
480
481 if (!IN_DESTRUCT) 774 if (!IN_DESTRUCT)
482 {
483 dounwind (-1);/*D*//*remove*/
484 SvREFCNT_dec (PL_curstackinfo->si_stack); 775 SvREFCNT_dec (PL_curstackinfo->si_stack);
485 }
486 776
487 Safefree (PL_curstackinfo->si_cxstack); 777 Safefree (PL_curstackinfo->si_cxstack);
488 Safefree (PL_curstackinfo); 778 Safefree (PL_curstackinfo);
489 PL_curstackinfo = p; 779 PL_curstackinfo = p;
490 } 780 }
491 781
492 Safefree (PL_tmps_stack); 782 Safefree (PL_tmps_stack);
493 Safefree (PL_markstack); 783 Safefree (PL_markstack);
494 Safefree (PL_scopestack); 784 Safefree (PL_scopestack);
495 Safefree (PL_savestack); 785 Safefree (PL_savestack);
496#if !PERL_VERSION_ATLEAST (5,9,0) 786#if !PERL_VERSION_ATLEAST (5,10,0)
497 Safefree (PL_retstack); 787 Safefree (PL_retstack);
498#endif 788#endif
499} 789}
500 790
791#define CORO_RSS \
792 rss += sizeof (SYM (curstackinfo)); \
793 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
794 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
795 rss += SYM (tmps_max) * sizeof (SV *); \
796 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
797 rss += SYM (scopestack_max) * sizeof (I32); \
798 rss += SYM (savestack_max) * sizeof (ANY);
799
800static size_t
801coro_rss (pTHX_ struct coro *coro)
802{
803 size_t rss = sizeof (*coro);
804
805 if (coro->mainstack)
806 {
807 if (coro->flags & CF_RUNNING)
808 {
809 #define SYM(sym) PL_ ## sym
810 CORO_RSS;
811 #undef SYM
812 }
813 else
814 {
815 #define SYM(sym) coro->slot->sym
816 CORO_RSS;
817 #undef SYM
818 }
819 }
820
821 return rss;
822}
823
824/** coroutine stack handling ************************************************/
825
826static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
828static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
829
830/* apparently < 5.8.8 */
831#ifndef MgPV_nolen_const
832#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
833 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
834 (const char*)(mg)->mg_ptr)
835#endif
836
837/*
838 * This overrides the default magic get method of %SIG elements.
839 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
840 * and instead of trying to save and restore the hash elements, we just provide
841 * readback here.
842 */
501static void 843static int
502setup_coro (struct coro *coro) 844coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
845{
846 const char *s = MgPV_nolen_const (mg);
847
848 if (*s == '_')
849 {
850 SV **svp = 0;
851
852 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
853 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
854
855 if (svp)
856 {
857 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
858 return 0;
859 }
860 }
861
862 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
863}
864
865static int
866coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
867{
868 const char *s = MgPV_nolen_const (mg);
869
870 if (*s == '_')
871 {
872 SV **svp = 0;
873
874 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
875 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
876
877 if (svp)
878 {
879 SV *old = *svp;
880 *svp = 0;
881 SvREFCNT_dec (old);
882 return 0;
883 }
884 }
885
886 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
887}
888
889static int
890coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
891{
892 const char *s = MgPV_nolen_const (mg);
893
894 if (*s == '_')
895 {
896 SV **svp = 0;
897
898 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
899 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
900
901 if (svp)
902 {
903 SV *old = *svp;
904 *svp = SvOK (sv) ? newSVsv (sv) : 0;
905 SvREFCNT_dec (old);
906 return 0;
907 }
908 }
909
910 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
911}
912
913static void
914prepare_nop (pTHX_ struct coro_transfer_args *ta)
915{
916 /* kind of mega-hacky, but works */
917 ta->next = ta->prev = (struct coro *)ta;
918}
919
920static int
921slf_check_nop (pTHX_ struct CoroSLF *frame)
922{
923 return 0;
924}
925
926static int
927slf_check_repeat (pTHX_ struct CoroSLF *frame)
928{
929 return 1;
930}
931
932static UNOP coro_setup_op;
933
934static void NOINLINE /* noinline to keep it out of the transfer fast path */
935coro_setup (pTHX_ struct coro *coro)
503{ 936{
504 /* 937 /*
505 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
506 */ 939 */
507
508 coro_init_stacks (); 940 coro_init_stacks (aTHX);
509 941
942 PL_runops = RUNOPS_DEFAULT;
510 PL_curcop = &PL_compiling; 943 PL_curcop = &PL_compiling;
511 PL_in_eval = EVAL_NULL; 944 PL_in_eval = EVAL_NULL;
945 PL_comppad = 0;
946 PL_comppad_name = 0;
947 PL_comppad_name_fill = 0;
948 PL_comppad_name_floor = 0;
512 PL_curpm = 0; 949 PL_curpm = 0;
950 PL_curpad = 0;
513 PL_localizing = 0; 951 PL_localizing = 0;
514 PL_dirty = 0; 952 PL_dirty = 0;
515 PL_restartop = 0; 953 PL_restartop = 0;
954#if PERL_VERSION_ATLEAST (5,10,0)
955 PL_parser = 0;
956#endif
957 PL_hints = 0;
958
959 /* recreate the die/warn hooks */
960 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
961 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
962
963 GvSV (PL_defgv) = newSV (0);
964 GvAV (PL_defgv) = coro->args; coro->args = 0;
965 GvSV (PL_errgv) = newSV (0);
966 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
967 GvHV (PL_hintgv) = 0;
968 PL_rs = newSVsv (GvSV (irsgv));
969 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
516 970
517 { 971 {
518 dSP; 972 dSP;
519 LOGOP myop; 973 UNOP myop;
520 974
521 SvREFCNT_dec (GvAV (PL_defgv));
522 GvAV (PL_defgv) = coro->args; coro->args = 0;
523
524 Zero (&myop, 1, LOGOP); 975 Zero (&myop, 1, UNOP);
525 myop.op_next = Nullop; 976 myop.op_next = Nullop;
977 myop.op_type = OP_ENTERSUB;
526 myop.op_flags = OPf_WANT_VOID; 978 myop.op_flags = OPf_WANT_VOID;
527 979
528 PUSHMARK (SP); 980 PUSHMARK (SP);
529 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 981 PUSHs ((SV *)coro->startcv);
530 PUTBACK; 982 PUTBACK;
531 PL_op = (OP *)&myop; 983 PL_op = (OP *)&myop;
532 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 984 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
533 SPAGAIN;
534 } 985 }
535 986
536 ENTER; /* necessary e.g. for dounwind */ 987 /* this newly created coroutine might be run on an existing cctx which most
537} 988 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
989 */
990 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
991 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
538 992
993 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
994 coro_setup_op.op_next = PL_op;
995 coro_setup_op.op_type = OP_ENTERSUB;
996 coro_setup_op.op_ppaddr = pp_slf;
997 /* no flags etc. required, as an init function won't be called */
998
999 PL_op = (OP *)&coro_setup_op;
1000
1001 /* copy throw, in case it was set before coro_setup */
1002 CORO_THROW = coro->except;
1003
1004 if (expect_false (enable_times))
1005 {
1006 coro_times_update ();
1007 coro_times_sub (coro);
1008 }
1009}
1010
539static void 1011static void
1012coro_unwind_stacks (pTHX)
1013{
1014 if (!IN_DESTRUCT)
1015 {
1016 /* restore all saved variables and stuff */
1017 LEAVE_SCOPE (0);
1018 assert (PL_tmps_floor == -1);
1019
1020 /* free all temporaries */
1021 FREETMPS;
1022 assert (PL_tmps_ix == -1);
1023
1024 /* unwind all extra stacks */
1025 POPSTACK_TO (PL_mainstack);
1026
1027 /* unwind main stack */
1028 dounwind (-1);
1029 }
1030}
1031
1032static void
1033coro_destruct_perl (pTHX_ struct coro *coro)
1034{
1035 SV *svf [9];
1036
1037 {
1038 struct coro *current = SvSTATE_current;
1039
1040 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1041
1042 save_perl (aTHX_ current);
1043 load_perl (aTHX_ coro);
1044
1045 coro_unwind_stacks (aTHX);
1046 coro_destruct_stacks (aTHX);
1047
1048 // now save some sv's to be free'd later
1049 svf [0] = GvSV (PL_defgv);
1050 svf [1] = (SV *)GvAV (PL_defgv);
1051 svf [2] = GvSV (PL_errgv);
1052 svf [3] = (SV *)PL_defoutgv;
1053 svf [4] = PL_rs;
1054 svf [5] = GvSV (irsgv);
1055 svf [6] = (SV *)GvHV (PL_hintgv);
1056 svf [7] = PL_diehook;
1057 svf [8] = PL_warnhook;
1058 assert (9 == sizeof (svf) / sizeof (*svf));
1059
1060 load_perl (aTHX_ current);
1061 }
1062
1063 {
1064 unsigned int i;
1065
1066 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1067 SvREFCNT_dec (svf [i]);
1068
1069 SvREFCNT_dec (coro->saved_deffh);
1070 SvREFCNT_dec (coro->rouse_cb);
1071 SvREFCNT_dec (coro->invoke_cb);
1072 SvREFCNT_dec (coro->invoke_av);
1073 }
1074}
1075
1076INLINE void
540free_coro_mortal () 1077free_coro_mortal (pTHX)
541{ 1078{
542 if (coro_mortal) 1079 if (expect_true (coro_mortal))
543 { 1080 {
544 SvREFCNT_dec (coro_mortal); 1081 SvREFCNT_dec (coro_mortal);
545 coro_mortal = 0; 1082 coro_mortal = 0;
546 } 1083 }
547} 1084}
548 1085
549/* inject a fake call to Coro::State::_cctx_init into the execution */ 1086static int
1087runops_trace (pTHX)
1088{
1089 COP *oldcop = 0;
1090 int oldcxix = -2;
1091
1092 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1093 {
1094 PERL_ASYNC_CHECK ();
1095
1096 if (cctx_current->flags & CC_TRACE_ALL)
1097 {
1098 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1099 {
1100 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1101 SV **bot, **top;
1102 AV *av = newAV (); /* return values */
1103 SV **cb;
1104 dSP;
1105
1106 GV *gv = CvGV (cx->blk_sub.cv);
1107 SV *fullname = sv_2mortal (newSV (0));
1108 if (isGV (gv))
1109 gv_efullname3 (fullname, gv, 0);
1110
1111 bot = PL_stack_base + cx->blk_oldsp + 1;
1112 top = cx->blk_gimme == G_ARRAY ? SP + 1
1113 : cx->blk_gimme == G_SCALAR ? bot + 1
1114 : bot;
1115
1116 av_extend (av, top - bot);
1117 while (bot < top)
1118 av_push (av, SvREFCNT_inc_NN (*bot++));
1119
1120 PL_runops = RUNOPS_DEFAULT;
1121 ENTER;
1122 SAVETMPS;
1123 EXTEND (SP, 3);
1124 PUSHMARK (SP);
1125 PUSHs (&PL_sv_no);
1126 PUSHs (fullname);
1127 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1128 PUTBACK;
1129 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1130 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1131 SPAGAIN;
1132 FREETMPS;
1133 LEAVE;
1134 PL_runops = runops_trace;
1135 }
1136
1137 if (oldcop != PL_curcop)
1138 {
1139 oldcop = PL_curcop;
1140
1141 if (PL_curcop != &PL_compiling)
1142 {
1143 SV **cb;
1144
1145 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1146 {
1147 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1148
1149 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1150 {
1151 dSP;
1152 GV *gv = CvGV (cx->blk_sub.cv);
1153 SV *fullname = sv_2mortal (newSV (0));
1154
1155 if (isGV (gv))
1156 gv_efullname3 (fullname, gv, 0);
1157
1158 PL_runops = RUNOPS_DEFAULT;
1159 ENTER;
1160 SAVETMPS;
1161 EXTEND (SP, 3);
1162 PUSHMARK (SP);
1163 PUSHs (&PL_sv_yes);
1164 PUSHs (fullname);
1165 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1166 PUTBACK;
1167 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1168 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1169 SPAGAIN;
1170 FREETMPS;
1171 LEAVE;
1172 PL_runops = runops_trace;
1173 }
1174
1175 oldcxix = cxstack_ix;
1176 }
1177
1178 if (cctx_current->flags & CC_TRACE_LINE)
1179 {
1180 dSP;
1181
1182 PL_runops = RUNOPS_DEFAULT;
1183 ENTER;
1184 SAVETMPS;
1185 EXTEND (SP, 3);
1186 PL_runops = RUNOPS_DEFAULT;
1187 PUSHMARK (SP);
1188 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1189 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1190 PUTBACK;
1191 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1192 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1193 SPAGAIN;
1194 FREETMPS;
1195 LEAVE;
1196 PL_runops = runops_trace;
1197 }
1198 }
1199 }
1200 }
1201 }
1202
1203 TAINT_NOT;
1204 return 0;
1205}
1206
1207static struct CoroSLF cctx_ssl_frame;
1208
1209static void
1210slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1211{
1212 ta->prev = 0;
1213}
1214
1215static int
1216slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1217{
1218 *frame = cctx_ssl_frame;
1219
1220 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1221}
1222
1223/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
550static void NOINLINE 1224static void NOINLINE
551prepare_cctx (coro_cctx *cctx) 1225cctx_prepare (pTHX)
552{ 1226{
553 dSP;
554 LOGOP myop;
555
556 Zero (&myop, 1, LOGOP);
557 myop.op_next = PL_op;
558 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559
560 PUSHMARK (SP);
561 EXTEND (SP, 2);
562 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
563 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
564 PUTBACK;
565 PL_op = (OP *)&myop;
566 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567 SPAGAIN;
568}
569
570static void
571coro_run (void *arg)
572{
573 /* coro_run is the alternative tail of transfer(), so unlock here. */
574 UNLOCK;
575
576 /*
577 * this is a _very_ stripped down perl interpreter ;)
578 */
579 PL_top_env = &PL_start_env; 1227 PL_top_env = &PL_start_env;
580 1228
1229 if (cctx_current->flags & CC_TRACE)
1230 PL_runops = runops_trace;
1231
1232 /* we already must be executing an SLF op, there is no other valid way
1233 * that can lead to creation of a new cctx */
1234 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1235 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1236
1237 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1238 cctx_ssl_frame = slf_frame;
1239
1240 slf_frame.prepare = slf_prepare_set_stacklevel;
1241 slf_frame.check = slf_check_set_stacklevel;
1242}
1243
1244/* the tail of transfer: execute stuff we can only do after a transfer */
1245INLINE void
1246transfer_tail (pTHX)
1247{
1248 free_coro_mortal (aTHX);
1249}
1250
1251/*
1252 * this is a _very_ stripped down perl interpreter ;)
1253 */
1254static void
1255cctx_run (void *arg)
1256{
1257#ifdef USE_ITHREADS
1258# if CORO_PTHREAD
1259 PERL_SET_CONTEXT (coro_thx);
1260# endif
1261#endif
1262 {
1263 dTHX;
1264
1265 /* normally we would need to skip the entersub here */
1266 /* not doing so will re-execute it, which is exactly what we want */
1267 /* PL_nop = PL_nop->op_next */
1268
581 /* inject call to cctx_init */ 1269 /* inject a fake subroutine call to cctx_init */
582 prepare_cctx ((coro_cctx *)arg); 1270 cctx_prepare (aTHX);
583 1271
1272 /* cctx_run is the alternative tail of transfer() */
1273 transfer_tail (aTHX);
1274
584 /* somebody will hit me for both perl_run and PL_restartop */ 1275 /* somebody or something will hit me for both perl_run and PL_restartop */
585 PL_restartop = PL_op; 1276 PL_restartop = PL_op;
586 perl_run (PL_curinterp); 1277 perl_run (PL_curinterp);
1278 /*
1279 * Unfortunately, there is no way to get at the return values of the
1280 * coro body here, as perl_run destroys these
1281 */
587 1282
588 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1283 /*
589 abort (); 1284 * If perl-run returns we assume exit() was being called or the coro
1285 * fell off the end, which seems to be the only valid (non-bug)
1286 * reason for perl_run to return. We try to exit by jumping to the
1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1291 */
1292 PL_top_env = main_top_env;
1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
590} 1295}
591 1296
592static coro_cctx * 1297static coro_cctx *
593cctx_new () 1298cctx_new ()
594{ 1299{
595 coro_cctx *cctx; 1300 coro_cctx *cctx;
596 1301
597 ++cctx_count; 1302 ++cctx_count;
598
599 Newz (0, cctx, 1, coro_cctx); 1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1329 void *stack_start;
1330 size_t stack_size;
600 1331
601#if HAVE_MMAP 1332#if HAVE_MMAP
602
603 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
604 /* mmap supposedly does allocate-on-write for us */ 1334 /* mmap supposedly does allocate-on-write for us */
605 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
606 1336
607 if (cctx->sptr == (void *)-1) 1337 if (cctx->sptr != (void *)-1)
608 {
609 perror ("FATAL: unable to mmap stack for coroutine");
610 _exit (EXIT_FAILURE);
611 } 1338 {
612 1339 #if CORO_STACKGUARD
613# if STACKGUARD
614 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
615# endif 1341 #endif
616 1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
617#else 1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
618 1344 cctx->flags |= CC_MAPPED;
619 cctx->ssize = STACKSIZE * (long)sizeof (long);
620 New (0, cctx->sptr, STACKSIZE, long);
621
622 if (!cctx->sptr)
623 { 1345 }
624 perror ("FATAL: unable to malloc stack for coroutine"); 1346 else
625 _exit (EXIT_FAILURE);
626 }
627
628#endif 1347#endif
1348 {
1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1350 New (0, cctx->sptr, cctx_stacksize, long);
629 1351
1352 if (!cctx->sptr)
1353 {
1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1355 _exit (EXIT_FAILURE);
1356 }
1357
1358 stack_start = cctx->sptr;
1359 stack_size = cctx->ssize;
1360 }
1361
630#if USE_VALGRIND 1362 #if CORO_USE_VALGRIND
631 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
632 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
633 cctx->ssize + (char *)cctx->sptr
634 );
635#endif 1364 #endif
636 1365
637 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
638 1367
639 return cctx; 1368 return cctx;
640} 1369}
641 1370
642static void 1371static void
643cctx_destroy (coro_cctx *cctx) 1372cctx_destroy (coro_cctx *cctx)
644{ 1373{
645 if (!cctx) 1374 if (!cctx)
646 return; 1375 return;
647 1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
648 --cctx_count; 1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
649 1381
650#if USE_VALGRIND 1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1385 #if CORO_USE_VALGRIND
651 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
652#endif 1393#endif
653
654#if HAVE_MMAP
655 munmap (cctx->sptr, cctx->ssize);
656#else
657 Safefree (cctx->sptr); 1394 Safefree (cctx->sptr);
658#endif 1395 }
659 1396
660 Safefree (cctx); 1397 Safefree (cctx);
661} 1398}
662 1399
1400/* wether this cctx should be destructed */
1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1402
663static coro_cctx * 1403static coro_cctx *
664cctx_get () 1404cctx_get (pTHX)
665{ 1405{
666 coro_cctx *cctx; 1406 while (expect_true (cctx_first))
667
668 if (cctx_first)
669 { 1407 {
670 cctx = cctx_first; 1408 coro_cctx *cctx = cctx_first;
671 cctx_first = cctx->next; 1409 cctx_first = cctx->next;
672 --cctx_idle; 1410 --cctx_idle;
673 } 1411
674 else 1412 if (expect_true (!CCTX_EXPIRED (cctx)))
675 { 1413 return cctx;
676 cctx = cctx_new (); 1414
677 PL_op = PL_op->op_next; 1415 cctx_destroy (cctx);
678 } 1416 }
679 1417
680 return cctx; 1418 return cctx_new_run ();
681} 1419}
682 1420
683static void 1421static void
684cctx_put (coro_cctx *cctx) 1422cctx_put (coro_cctx *cctx)
685{ 1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
686 /* free another cctx if overlimit */ 1426 /* free another cctx if overlimit */
687 if (cctx_idle >= MAX_IDLE_CCTX) 1427 if (expect_false (cctx_idle >= cctx_max_idle))
688 { 1428 {
689 coro_cctx *first = cctx_first; 1429 coro_cctx *first = cctx_first;
690 cctx_first = first->next; 1430 cctx_first = first->next;
691 --cctx_idle; 1431 --cctx_idle;
692 1432
693 assert (!first->inuse);
694 cctx_destroy (first); 1433 cctx_destroy (first);
695 } 1434 }
696 1435
697 ++cctx_idle; 1436 ++cctx_idle;
698 cctx->next = cctx_first; 1437 cctx->next = cctx_first;
699 cctx_first = cctx; 1438 cctx_first = cctx;
700} 1439}
701 1440
702/* never call directly, always through the coro_state_transfer global variable */ 1441/** coroutine switching *****************************************************/
703static void NOINLINE 1442
1443static void
704transfer (struct coro *prev, struct coro *next) 1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1448 if (expect_true (prev != next))
1449 {
1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1452
1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1455
1456#if !PERL_VERSION_ATLEAST (5,10,0)
1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1459#endif
1460 }
1461}
1462
1463/* always use the TRANSFER macro */
1464static void NOINLINE /* noinline so we have a fixed stackframe */
1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
705{ 1466{
706 dSTACKLEVEL; 1467 dSTACKLEVEL;
707 1468
708 /* sometimes transfer is only called to set idle_sp */ 1469 /* sometimes transfer is only called to set idle_sp */
709 if (!next) 1470 if (expect_false (!prev))
710 { 1471 {
711 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1472 cctx_current->idle_sp = STACKLEVEL;
712 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
713 }
714 else if (prev != next)
715 { 1474 }
1475 else if (expect_true (prev != next))
1476 {
716 coro_cctx *prev__cctx; 1477 coro_cctx *cctx_prev;
717 1478
718 if (prev->flags & CF_NEW) 1479 if (expect_false (prev->flags & CF_NEW))
719 { 1480 {
720 /* create a new empty context */ 1481 /* create a new empty/source context */
721 Newz (0, prev->cctx, 1, coro_cctx);
722 prev->cctx->inuse = 1;
723 prev->flags &= ~CF_NEW; 1482 prev->flags &= ~CF_NEW;
724 prev->flags |= CF_RUNNING; 1483 prev->flags |= CF_RUNNING;
725 } 1484 }
726 1485
727 /*TODO: must not croak here */
728 if (!prev->flags & CF_RUNNING)
729 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
730
731 if (next->flags & CF_RUNNING)
732 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
733
734 prev->flags &= ~CF_RUNNING; 1486 prev->flags &= ~CF_RUNNING;
735 next->flags |= CF_RUNNING; 1487 next->flags |= CF_RUNNING;
736 1488
737 LOCK; 1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
738 1491
739 if (next->flags & CF_NEW) 1492 if (expect_false (next->flags & CF_NEW))
740 { 1493 {
741 /* need to start coroutine */ 1494 /* need to start coroutine */
742 next->flags &= ~CF_NEW; 1495 next->flags &= ~CF_NEW;
743 /* first get rid of the old state */
744 save_perl (prev);
745 /* setup coroutine call */ 1496 /* setup coroutine call */
746 setup_coro (next); 1497 coro_setup (aTHX_ next);
747 /* need a new stack */
748 assert (!next->cctx);
749 } 1498 }
750 else 1499 else
1500 load_perl (aTHX_ next);
1501
1502 /* possibly untie and reuse the cctx */
1503 if (expect_true (
1504 cctx_current->idle_sp == STACKLEVEL
1505 && !(cctx_current->flags & CC_TRACE)
1506 && !force_cctx
1507 ))
751 { 1508 {
752 /* coroutine already started */ 1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
753 save_perl (prev); 1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
754 load_perl (next); 1511
1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1515 if (expect_true (!next->cctx))
1516 next->cctx = cctx_get (aTHX);
1517
1518 cctx_put (cctx_current);
755 } 1519 }
1520 else
1521 prev->cctx = cctx_current;
756 1522
757 prev__cctx = prev->cctx; 1523 ++next->usecount;
758 1524
759 /* possibly "free" the cctx */ 1525 cctx_prev = cctx_current;
760 if (prev__cctx->idle_sp == STACKLEVEL) 1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1527
1528 next->cctx = 0;
1529
1530 if (expect_false (cctx_prev != cctx_current))
761 { 1531 {
762 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1532 cctx_prev->top_env = PL_top_env;
763 assert (PL_top_env == prev__cctx->top_env); 1533 PL_top_env = cctx_current->top_env;
764 1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
765 prev->cctx = 0;
766
767 cctx_put (prev__cctx);
768 prev__cctx->inuse = 0;
769 } 1535 }
770 1536
771 if (!next->cctx) 1537 transfer_tail (aTHX);
772 {
773 next->cctx = cctx_get ();
774 assert (!next->cctx->inuse);
775 next->cctx->inuse = 1;
776 }
777
778 if (prev__cctx != next->cctx)
779 {
780 prev__cctx->top_env = PL_top_env;
781 PL_top_env = next->cctx->top_env;
782 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
783 }
784
785 free_coro_mortal ();
786
787 UNLOCK;
788 } 1538 }
789} 1539}
790 1540
791struct transfer_args 1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
792{
793 struct coro *prev, *next;
794};
795
796#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
797 1543
1544/** high level stuff ********************************************************/
1545
798static void 1546static int
799coro_state_destroy (struct coro *coro) 1547coro_state_destroy (pTHX_ struct coro *coro)
800{ 1548{
801 if (coro->refcnt--) 1549 if (coro->flags & CF_DESTROYED)
802 return; 1550 return 0;
803 1551
804 if (coro->mainstack && coro->mainstack != main_mainstack) 1552 if (coro->on_destroy && !PL_dirty)
805 { 1553 coro->on_destroy (aTHX_ coro);
806 struct coro temp;
807 Zero (&temp, 1, struct coro);
808 temp.save = CORO_SAVE_ALL;
809 1554
1555 coro->flags |= CF_DESTROYED;
1556
810 if (coro->flags & CF_RUNNING) 1557 if (coro->flags & CF_READY)
811 croak ("FATAL: tried to destroy currently running coroutine");
812
813 save_perl (&temp);
814 load_perl (coro);
815
816 coro_destroy_stacks ();
817
818 load_perl (&temp); /* this will get rid of defsv etc.. */
819
820 coro->mainstack = 0;
821 } 1558 {
1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1560 /* alternative: look through all ready queues and remove the coro */
1561 --coro_nready;
1562 }
1563 else
1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1565
1566 if (coro->mainstack
1567 && coro->mainstack != main_mainstack
1568 && coro->slot
1569 && !PL_dirty)
1570 coro_destruct_perl (aTHX_ coro);
822 1571
823 cctx_destroy (coro->cctx); 1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
824 SvREFCNT_dec (coro->args); 1574 SvREFCNT_dec (coro->args);
825 Safefree (coro); 1575 SvREFCNT_dec (CORO_THROW);
1576
1577 if (coro->next) coro->next->prev = coro->prev;
1578 if (coro->prev) coro->prev->next = coro->next;
1579 if (coro == coro_first) coro_first = coro->next;
1580
1581 return 1;
826} 1582}
827 1583
828static int 1584static int
829coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1585coro_state_free (pTHX_ SV *sv, MAGIC *mg)
830{ 1586{
831 struct coro *coro = (struct coro *)mg->mg_ptr; 1587 struct coro *coro = (struct coro *)mg->mg_ptr;
832 mg->mg_ptr = 0; 1588 mg->mg_ptr = 0;
833 1589
1590 coro->hv = 0;
1591
1592 if (--coro->refcnt < 0)
1593 {
834 coro_state_destroy (coro); 1594 coro_state_destroy (aTHX_ coro);
1595 Safefree (coro);
1596 }
835 1597
836 return 0; 1598 return 0;
837} 1599}
838 1600
839static int 1601static int
… …
846 return 0; 1608 return 0;
847} 1609}
848 1610
849static MGVTBL coro_state_vtbl = { 1611static MGVTBL coro_state_vtbl = {
850 0, 0, 0, 0, 1612 0, 0, 0, 0,
851 coro_state_clear, 1613 coro_state_free,
852 0, 1614 0,
853#ifdef MGf_DUP 1615#ifdef MGf_DUP
854 coro_state_dup, 1616 coro_state_dup,
855#else 1617#else
856# define MGf_DUP 0 1618# define MGf_DUP 0
857#endif 1619#endif
858}; 1620};
859 1621
860static struct coro *
861SvSTATE (SV *coro)
862{
863 HV *stash;
864 MAGIC *mg;
865
866 if (SvROK (coro))
867 coro = SvRV (coro);
868
869 stash = SvSTASH (coro);
870 if (stash != coro_stash && stash != coro_state_stash)
871 {
872 /* very slow, but rare, check */
873 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
874 croak ("Coro::State object required");
875 }
876
877 mg = SvMAGIC (coro);
878 assert (mg->mg_type == PERL_MAGIC_ext);
879 return (struct coro *)mg->mg_ptr;
880}
881
882static void 1622static void
883prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
884{ 1624{
885 ta->prev = SvSTATE (prev_sv); 1625 ta->prev = SvSTATE (prev_sv);
886 ta->next = SvSTATE (next_sv); 1626 ta->next = SvSTATE (next_sv);
1627 TRANSFER_CHECK (*ta);
887} 1628}
888 1629
889static void 1630static void
890api_transfer (SV *prev_sv, SV *next_sv) 1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
891{ 1632{
892 struct transfer_args ta; 1633 struct coro_transfer_args ta;
893 1634
894 prepare_transfer (&ta, prev_sv, next_sv); 1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
895 TRANSFER (ta); 1636 TRANSFER (ta, 1);
1637}
1638
1639/** Coro ********************************************************************/
1640
1641INLINE void
1642coro_enq (pTHX_ struct coro *coro)
1643{
1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1645
1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1659 {
1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1669
1670 return 0;
896} 1671}
897 1672
898static int 1673static int
899api_save (SV *coro_sv, int new_save)
900{
901 struct coro *coro = SvSTATE (coro_sv);
902 int old_save = coro->save;
903
904 if (new_save >= 0)
905 coro->save = new_save;
906
907 return old_save;
908}
909
910/** Coro ********************************************************************/
911
912#define PRIO_MAX 3
913#define PRIO_HIGH 1
914#define PRIO_NORMAL 0
915#define PRIO_LOW -1
916#define PRIO_IDLE -3
917#define PRIO_MIN -4
918
919/* for Coro.pm */
920static SV *coro_current;
921static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922static int coro_nready;
923
924static void
925coro_enq (SV *coro_sv)
926{
927 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
928 coro_nready++;
929}
930
931static SV *
932coro_deq (int min_prio)
933{
934 int prio = PRIO_MAX - PRIO_MIN;
935
936 min_prio -= PRIO_MIN;
937 if (min_prio < 0)
938 min_prio = 0;
939
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
941 if (AvFILLp (coro_ready [prio]) >= 0)
942 {
943 coro_nready--;
944 return av_shift (coro_ready [prio]);
945 }
946
947 return 0;
948}
949
950static int
951api_ready (SV *coro_sv) 1674api_ready (pTHX_ SV *coro_sv)
952{ 1675{
953 struct coro *coro; 1676 struct coro *coro;
954 1677 SV *sv_hook;
955 if (SvROK (coro_sv)) 1678 void (*xs_hook)(void);
956 coro_sv = SvRV (coro_sv);
957 1679
958 coro = SvSTATE (coro_sv); 1680 coro = SvSTATE (coro_sv);
959 1681
960 if (coro->flags & CF_READY) 1682 if (coro->flags & CF_READY)
961 return 0; 1683 return 0;
962 1684
963#if 0 /* this is actually harmless */ 1685 coro->flags |= CF_READY;
1686
1687 sv_hook = coro_nready ? 0 : coro_readyhook;
1688 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1689
1690 coro_enq (aTHX_ coro);
1691 ++coro_nready;
1692
1693 if (sv_hook)
1694 {
1695 dSP;
1696
1697 ENTER;
1698 SAVETMPS;
1699
1700 PUSHMARK (SP);
1701 PUTBACK;
1702 call_sv (sv_hook, G_VOID | G_DISCARD);
1703
1704 FREETMPS;
1705 LEAVE;
1706 }
1707
1708 if (xs_hook)
1709 xs_hook ();
1710
1711 return 1;
1712}
1713
1714static int
1715api_is_ready (pTHX_ SV *coro_sv)
1716{
1717 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1718}
1719
1720/* expects to own a reference to next->hv */
1721INLINE void
1722prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1723{
1724 SV *prev_sv = SvRV (coro_current);
1725
1726 ta->prev = SvSTATE_hv (prev_sv);
1727 ta->next = next;
1728
1729 TRANSFER_CHECK (*ta);
1730
1731 SvRV_set (coro_current, (SV *)next->hv);
1732
1733 free_coro_mortal (aTHX);
1734 coro_mortal = prev_sv;
1735}
1736
1737static void
1738prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1739{
1740 for (;;)
1741 {
1742 struct coro *next = coro_deq (aTHX);
1743
1744 if (expect_true (next))
1745 {
1746 /* cannot transfer to destroyed coros, skip and look for next */
1747 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1748 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1749 else
1750 {
1751 next->flags &= ~CF_READY;
1752 --coro_nready;
1753
1754 prepare_schedule_to (aTHX_ ta, next);
1755 break;
1756 }
1757 }
1758 else
1759 {
1760 /* nothing to schedule: call the idle handler */
1761 if (SvROK (sv_idle)
1762 && SvOBJECT (SvRV (sv_idle)))
1763 {
1764 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1765 api_ready (aTHX_ SvRV (sv_idle));
1766 --coro_nready;
1767 }
1768 else
1769 {
1770 dSP;
1771
1772 ENTER;
1773 SAVETMPS;
1774
1775 PUSHMARK (SP);
1776 PUTBACK;
1777 call_sv (sv_idle, G_VOID | G_DISCARD);
1778
1779 FREETMPS;
1780 LEAVE;
1781 }
1782 }
1783 }
1784}
1785
1786INLINE void
1787prepare_cede (pTHX_ struct coro_transfer_args *ta)
1788{
1789 api_ready (aTHX_ coro_current);
1790 prepare_schedule (aTHX_ ta);
1791}
1792
1793INLINE void
1794prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1795{
1796 SV *prev = SvRV (coro_current);
1797
1798 if (coro_nready)
1799 {
1800 prepare_schedule (aTHX_ ta);
1801 api_ready (aTHX_ prev);
1802 }
1803 else
1804 prepare_nop (aTHX_ ta);
1805}
1806
1807static void
1808api_schedule (pTHX)
1809{
1810 struct coro_transfer_args ta;
1811
1812 prepare_schedule (aTHX_ &ta);
1813 TRANSFER (ta, 1);
1814}
1815
1816static void
1817api_schedule_to (pTHX_ SV *coro_sv)
1818{
1819 struct coro_transfer_args ta;
1820 struct coro *next = SvSTATE (coro_sv);
1821
1822 SvREFCNT_inc_NN (coro_sv);
1823 prepare_schedule_to (aTHX_ &ta, next);
1824}
1825
1826static int
1827api_cede (pTHX)
1828{
1829 struct coro_transfer_args ta;
1830
1831 prepare_cede (aTHX_ &ta);
1832
1833 if (expect_true (ta.prev != ta.next))
1834 {
1835 TRANSFER (ta, 1);
1836 return 1;
1837 }
1838 else
1839 return 0;
1840}
1841
1842static int
1843api_cede_notself (pTHX)
1844{
1845 if (coro_nready)
1846 {
1847 struct coro_transfer_args ta;
1848
1849 prepare_cede_notself (aTHX_ &ta);
1850 TRANSFER (ta, 1);
1851 return 1;
1852 }
1853 else
1854 return 0;
1855}
1856
1857static void
1858api_trace (pTHX_ SV *coro_sv, int flags)
1859{
1860 struct coro *coro = SvSTATE (coro_sv);
1861
964 if (coro->flags & CF_RUNNING) 1862 if (coro->flags & CF_RUNNING)
965 croak ("Coro::ready called on currently running coroutine"); 1863 croak ("cannot enable tracing on a running coroutine, caught");
966#endif
967 1864
968 coro->flags |= CF_READY; 1865 if (flags & CC_TRACE)
1866 {
1867 if (!coro->cctx)
1868 coro->cctx = cctx_new_run ();
1869 else if (!(coro->cctx->flags & CC_TRACE))
1870 croak ("cannot enable tracing on coroutine with custom stack, caught");
969 1871
970 LOCK; 1872 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
971 coro_enq (SvREFCNT_inc (coro_sv)); 1873 }
972 UNLOCK; 1874 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1875 {
1876 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
973 1877
974 return 1; 1878 if (coro->flags & CF_RUNNING)
1879 PL_runops = RUNOPS_DEFAULT;
1880 else
1881 coro->slot->runops = RUNOPS_DEFAULT;
1882 }
975} 1883}
1884
1885static void
1886coro_call_on_destroy (pTHX_ struct coro *coro)
1887{
1888 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1889 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1890
1891 if (on_destroyp)
1892 {
1893 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1894
1895 while (AvFILLp (on_destroy) >= 0)
1896 {
1897 dSP; /* don't disturb outer sp */
1898 SV *cb = av_pop (on_destroy);
1899
1900 PUSHMARK (SP);
1901
1902 if (statusp)
1903 {
1904 int i;
1905 AV *status = (AV *)SvRV (*statusp);
1906 EXTEND (SP, AvFILLp (status) + 1);
1907
1908 for (i = 0; i <= AvFILLp (status); ++i)
1909 PUSHs (AvARRAY (status)[i]);
1910 }
1911
1912 PUTBACK;
1913 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1914 }
1915 }
1916}
1917
1918static void
1919slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1920{
1921 int i;
1922 HV *hv = (HV *)SvRV (coro_current);
1923 AV *av = newAV ();
1924
1925 av_extend (av, items - 1);
1926 for (i = 0; i < items; ++i)
1927 av_push (av, SvREFCNT_inc_NN (arg [i]));
1928
1929 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1930
1931 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1932 api_ready (aTHX_ sv_manager);
1933
1934 frame->prepare = prepare_schedule;
1935 frame->check = slf_check_repeat;
1936
1937 /* as a minor optimisation, we could unwind all stacks here */
1938 /* but that puts extra pressure on pp_slf, and is not worth much */
1939 /*coro_unwind_stacks (aTHX);*/
1940}
1941
1942/*****************************************************************************/
1943/* async pool handler */
976 1944
977static int 1945static int
978api_is_ready (SV *coro_sv) 1946slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
979{ 1947{
980 return !!SvSTATE (coro_sv)->flags & CF_READY; 1948 HV *hv = (HV *)SvRV (coro_current);
981} 1949 struct coro *coro = (struct coro *)frame->data;
982 1950
983static void 1951 if (!coro->invoke_cb)
984prepare_schedule (struct transfer_args *ta) 1952 return 1; /* loop till we have invoke */
985{ 1953 else
986 SV *prev, *next;
987
988 for (;;)
989 { 1954 {
990 LOCK; 1955 hv_store (hv, "desc", sizeof ("desc") - 1,
991 next = coro_deq (PRIO_MIN); 1956 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
992 UNLOCK;
993 1957
994 if (next) 1958 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
995 break;
996 1959
997 { 1960 {
998 dSP; 1961 dSP;
999 1962 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1000 ENTER;
1001 SAVETMPS;
1002
1003 PUSHMARK (SP);
1004 PUTBACK; 1963 PUTBACK;
1005 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1006
1007 FREETMPS;
1008 LEAVE;
1009 } 1964 }
1965
1966 SvREFCNT_dec (GvAV (PL_defgv));
1967 GvAV (PL_defgv) = coro->invoke_av;
1968 coro->invoke_av = 0;
1969
1970 return 0;
1971 }
1972}
1973
1974static void
1975slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1976{
1977 HV *hv = (HV *)SvRV (coro_current);
1978 struct coro *coro = SvSTATE_hv ((SV *)hv);
1979
1980 if (expect_true (coro->saved_deffh))
1010 } 1981 {
1982 /* subsequent iteration */
1983 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1984 coro->saved_deffh = 0;
1011 1985
1986 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1987 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1988 {
1989 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1990 coro->invoke_av = newAV ();
1991
1992 frame->prepare = prepare_nop;
1993 }
1994 else
1995 {
1996 av_clear (GvAV (PL_defgv));
1997 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (aTHX_ coro_current, 0);
2003
2004 frame->prepare = prepare_schedule;
2005 av_push (av_async_pool, SvREFCNT_inc (hv));
2006 }
2007 }
2008 else
2009 {
2010 /* first iteration, simply fall through */
2011 frame->prepare = prepare_nop;
2012 }
2013
2014 frame->check = slf_check_pool_handler;
2015 frame->data = (void *)coro;
2016}
2017
2018/*****************************************************************************/
2019/* rouse callback */
2020
2021#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2022
2023static void
2024coro_rouse_callback (pTHX_ CV *cv)
2025{
2026 dXSARGS;
2027 SV *data = (SV *)S_GENSUB_ARG;
2028
2029 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2030 {
2031 /* first call, set args */
2032 SV *coro = SvRV (data);
2033 AV *av = newAV ();
2034
2035 SvRV_set (data, (SV *)av);
2036
2037 /* better take a full copy of the arguments */
2038 while (items--)
2039 av_store (av, items, newSVsv (ST (items)));
2040
2041 api_ready (aTHX_ coro);
2042 SvREFCNT_dec (coro);
2043 }
2044
2045 XSRETURN_EMPTY;
2046}
2047
2048static int
2049slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2050{
2051 SV *data = (SV *)frame->data;
2052
2053 if (CORO_THROW)
2054 return 0;
2055
2056 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2057 return 1;
2058
2059 /* now push all results on the stack */
2060 {
2061 dSP;
2062 AV *av = (AV *)SvRV (data);
2063 int i;
2064
2065 EXTEND (SP, AvFILLp (av) + 1);
2066 for (i = 0; i <= AvFILLp (av); ++i)
2067 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2068
2069 /* we have stolen the elements, so set length to zero and free */
2070 AvFILLp (av) = -1;
2071 av_undef (av);
2072
2073 PUTBACK;
2074 }
2075
2076 return 0;
2077}
2078
2079static void
2080slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2081{
2082 SV *cb;
2083
2084 if (items)
2085 cb = arg [0];
2086 else
2087 {
2088 struct coro *coro = SvSTATE_current;
2089
2090 if (!coro->rouse_cb)
2091 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2092
2093 cb = sv_2mortal (coro->rouse_cb);
2094 coro->rouse_cb = 0;
2095 }
2096
2097 if (!SvROK (cb)
2098 || SvTYPE (SvRV (cb)) != SVt_PVCV
2099 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2100 croak ("Coro::rouse_wait called with illegal callback argument,");
2101
2102 {
2103 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
2106 frame->data = (void *)data;
2107 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2108 frame->check = slf_check_rouse_wait;
2109 }
2110}
2111
2112static SV *
2113coro_new_rouse_cb (pTHX)
2114{
1012 prev = SvRV (coro_current); 2115 HV *hv = (HV *)SvRV (coro_current);
1013 SvRV_set (coro_current, next); 2116 struct coro *coro = SvSTATE_hv (hv);
2117 SV *data = newRV_inc ((SV *)hv);
2118 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
1014 2119
1015 /* free this only after the transfer */ 2120 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1016 LOCK; 2121 SvREFCNT_dec (data); /* magicext increases the refcount */
1017 free_coro_mortal ();
1018 UNLOCK;
1019 coro_mortal = prev;
1020 2122
1021 assert (!SvROK(prev));//D 2123 SvREFCNT_dec (coro->rouse_cb);
1022 assert (!SvROK(next));//D 2124 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1023 2125
1024 ta->prev = SvSTATE (prev); 2126 return cb;
1025 ta->next = SvSTATE (next);
1026
1027 assert (ta->next->flags & CF_READY);
1028 ta->next->flags &= ~CF_READY;
1029} 2127}
1030 2128
2129/*****************************************************************************/
2130/* schedule-like-function opcode (SLF) */
2131
2132static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2133static const CV *slf_cv;
2134static SV **slf_argv;
2135static int slf_argc, slf_arga; /* count, allocated */
2136static I32 slf_ax; /* top of stack, for restore */
2137
2138/* this restores the stack in the case we patched the entersub, to */
2139/* recreate the stack frame as perl will on following calls */
2140/* since entersub cleared the stack */
2141static OP *
2142pp_restore (pTHX)
2143{
2144 int i;
2145 SV **SP = PL_stack_base + slf_ax;
2146
2147 PUSHMARK (SP);
2148
2149 EXTEND (SP, slf_argc + 1);
2150
2151 for (i = 0; i < slf_argc; ++i)
2152 PUSHs (sv_2mortal (slf_argv [i]));
2153
2154 PUSHs ((SV *)CvGV (slf_cv));
2155
2156 RETURNOP (slf_restore.op_first);
2157}
2158
1031static void 2159static void
2160slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2161{
2162 SV **arg = (SV **)slf_frame.data;
2163
2164 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2165}
2166
2167static void
2168slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2169{
2170 if (items != 2)
2171 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2172
2173 frame->prepare = slf_prepare_transfer;
2174 frame->check = slf_check_nop;
2175 frame->data = (void *)arg; /* let's hope it will stay valid */
2176}
2177
2178static void
2179slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 frame->prepare = prepare_schedule;
2182 frame->check = slf_check_nop;
2183}
2184
2185static void
1032prepare_cede (struct transfer_args *ta) 2186slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1033{ 2187{
2188 struct coro *next = (struct coro *)slf_frame.data;
2189
2190 SvREFCNT_inc_NN (next->hv);
2191 prepare_schedule_to (aTHX_ ta, next);
2192}
2193
2194static void
2195slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 if (!items)
2198 croak ("Coro::schedule_to expects a coroutine argument, caught");
2199
2200 frame->data = (void *)SvSTATE (arg [0]);
2201 frame->prepare = slf_prepare_schedule_to;
2202 frame->check = slf_check_nop;
2203}
2204
2205static void
2206slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
1034 api_ready (coro_current); 2208 api_ready (aTHX_ SvRV (coro_current));
1035 2209
1036 prepare_schedule (ta); 2210 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1037} 2211}
1038 2212
1039static void 2213static void
1040api_schedule (void) 2214slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1041{ 2215{
2216 frame->prepare = prepare_cede;
2217 frame->check = slf_check_nop;
2218}
2219
2220static void
2221slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2222{
2223 frame->prepare = prepare_cede_notself;
2224 frame->check = slf_check_nop;
2225}
2226
2227/*
2228 * these not obviously related functions are all rolled into one
2229 * function to increase chances that they all will call transfer with the same
2230 * stack offset
2231 * SLF stands for "schedule-like-function".
2232 */
2233static OP *
2234pp_slf (pTHX)
2235{
2236 I32 checkmark; /* mark SP to see how many elements check has pushed */
2237
2238 /* set up the slf frame, unless it has already been set-up */
2239 /* the latter happens when a new coro has been started */
2240 /* or when a new cctx was attached to an existing coroutine */
2241 if (expect_true (!slf_frame.prepare))
2242 {
2243 /* first iteration */
2244 dSP;
2245 SV **arg = PL_stack_base + TOPMARK + 1;
2246 int items = SP - arg; /* args without function object */
2247 SV *gv = *sp;
2248
2249 /* do a quick consistency check on the "function" object, and if it isn't */
2250 /* for us, divert to the real entersub */
2251 if (SvTYPE (gv) != SVt_PVGV
2252 || !GvCV (gv)
2253 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2254 return PL_ppaddr[OP_ENTERSUB](aTHX);
2255
2256 if (!(PL_op->op_flags & OPf_STACKED))
2257 {
2258 /* ampersand-form of call, use @_ instead of stack */
2259 AV *av = GvAV (PL_defgv);
2260 arg = AvARRAY (av);
2261 items = AvFILLp (av) + 1;
2262 }
2263
2264 /* now call the init function, which needs to set up slf_frame */
2265 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2266 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2267
2268 /* pop args */
2269 SP = PL_stack_base + POPMARK;
2270
2271 PUTBACK;
2272 }
2273
2274 /* now that we have a slf_frame, interpret it! */
2275 /* we use a callback system not to make the code needlessly */
2276 /* complicated, but so we can run multiple perl coros from one cctx */
2277
2278 do
2279 {
1042 struct transfer_args ta; 2280 struct coro_transfer_args ta;
1043 2281
1044 prepare_schedule (&ta); 2282 slf_frame.prepare (aTHX_ &ta);
1045 TRANSFER (ta); 2283 TRANSFER (ta, 0);
1046}
1047 2284
2285 checkmark = PL_stack_sp - PL_stack_base;
2286 }
2287 while (slf_frame.check (aTHX_ &slf_frame));
2288
2289 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2290
2291 /* exception handling */
2292 if (expect_false (CORO_THROW))
2293 {
2294 SV *exception = sv_2mortal (CORO_THROW);
2295
2296 CORO_THROW = 0;
2297 sv_setsv (ERRSV, exception);
2298 croak (0);
2299 }
2300
2301 /* return value handling - mostly like entersub */
2302 /* make sure we put something on the stack in scalar context */
2303 if (GIMME_V == G_SCALAR)
2304 {
2305 dSP;
2306 SV **bot = PL_stack_base + checkmark;
2307
2308 if (sp == bot) /* too few, push undef */
2309 bot [1] = &PL_sv_undef;
2310 else if (sp != bot + 1) /* too many, take last one */
2311 bot [1] = *sp;
2312
2313 SP = bot + 1;
2314
2315 PUTBACK;
2316 }
2317
2318 return NORMAL;
2319}
2320
2321static void
2322api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2323{
2324 int i;
2325 SV **arg = PL_stack_base + ax;
2326 int items = PL_stack_sp - arg + 1;
2327
2328 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2329
2330 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2331 && PL_op->op_ppaddr != pp_slf)
2332 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2333
2334 CvFLAGS (cv) |= CVf_SLF;
2335 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2336 slf_cv = cv;
2337
2338 /* we patch the op, and then re-run the whole call */
2339 /* we have to put the same argument on the stack for this to work */
2340 /* and this will be done by pp_restore */
2341 slf_restore.op_next = (OP *)&slf_restore;
2342 slf_restore.op_type = OP_CUSTOM;
2343 slf_restore.op_ppaddr = pp_restore;
2344 slf_restore.op_first = PL_op;
2345
2346 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2347
2348 if (PL_op->op_flags & OPf_STACKED)
2349 {
2350 if (items > slf_arga)
2351 {
2352 slf_arga = items;
2353 free (slf_argv);
2354 slf_argv = malloc (slf_arga * sizeof (SV *));
2355 }
2356
2357 slf_argc = items;
2358
2359 for (i = 0; i < items; ++i)
2360 slf_argv [i] = SvREFCNT_inc (arg [i]);
2361 }
2362 else
2363 slf_argc = 0;
2364
2365 PL_op->op_ppaddr = pp_slf;
2366 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2367
2368 PL_op = (OP *)&slf_restore;
2369}
2370
2371/*****************************************************************************/
2372/* dynamic wind */
2373
2374static void
2375on_enterleave_call (pTHX_ SV *cb)
2376{
2377 dSP;
2378
2379 PUSHSTACK;
2380
2381 PUSHMARK (SP);
2382 PUTBACK;
2383 call_sv (cb, G_VOID | G_DISCARD);
2384 SPAGAIN;
2385
2386 POPSTACK;
2387}
2388
2389static SV *
2390coro_avp_pop_and_free (pTHX_ AV **avp)
2391{
2392 AV *av = *avp;
2393 SV *res = av_pop (av);
2394
2395 if (AvFILLp (av) < 0)
2396 {
2397 *avp = 0;
2398 SvREFCNT_dec (av);
2399 }
2400
2401 return res;
2402}
2403
2404static void
2405coro_pop_on_enter (pTHX_ void *coro)
2406{
2407 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2408 SvREFCNT_dec (cb);
2409}
2410
2411static void
2412coro_pop_on_leave (pTHX_ void *coro)
2413{
2414 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2415 on_enterleave_call (aTHX_ sv_2mortal (cb));
2416}
2417
2418/*****************************************************************************/
2419/* PerlIO::cede */
2420
2421typedef struct
2422{
2423 PerlIOBuf base;
2424 NV next, every;
2425} PerlIOCede;
2426
2427static IV
2428PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2429{
2430 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2431
2432 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2433 self->next = nvtime () + self->every;
2434
2435 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2436}
2437
2438static SV *
2439PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2440{
2441 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2442
2443 return newSVnv (self->every);
2444}
2445
2446static IV
2447PerlIOCede_flush (pTHX_ PerlIO *f)
2448{
2449 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2450 double now = nvtime ();
2451
2452 if (now >= self->next)
2453 {
2454 api_cede (aTHX);
2455 self->next = now + self->every;
2456 }
2457
2458 return PerlIOBuf_flush (aTHX_ f);
2459}
2460
2461static PerlIO_funcs PerlIO_cede =
2462{
2463 sizeof(PerlIO_funcs),
2464 "cede",
2465 sizeof(PerlIOCede),
2466 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2467 PerlIOCede_pushed,
2468 PerlIOBuf_popped,
2469 PerlIOBuf_open,
2470 PerlIOBase_binmode,
2471 PerlIOCede_getarg,
2472 PerlIOBase_fileno,
2473 PerlIOBuf_dup,
2474 PerlIOBuf_read,
2475 PerlIOBuf_unread,
2476 PerlIOBuf_write,
2477 PerlIOBuf_seek,
2478 PerlIOBuf_tell,
2479 PerlIOBuf_close,
2480 PerlIOCede_flush,
2481 PerlIOBuf_fill,
2482 PerlIOBase_eof,
2483 PerlIOBase_error,
2484 PerlIOBase_clearerr,
2485 PerlIOBase_setlinebuf,
2486 PerlIOBuf_get_base,
2487 PerlIOBuf_bufsiz,
2488 PerlIOBuf_get_ptr,
2489 PerlIOBuf_get_cnt,
2490 PerlIOBuf_set_ptrcnt,
2491};
2492
2493/*****************************************************************************/
2494/* Coro::Semaphore & Coro::Signal */
2495
2496static SV *
2497coro_waitarray_new (pTHX_ int count)
2498{
2499 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2500 AV *av = newAV ();
2501 SV **ary;
2502
2503 /* unfortunately, building manually saves memory */
2504 Newx (ary, 2, SV *);
2505 AvALLOC (av) = ary;
2506#if PERL_VERSION_ATLEAST (5,10,0)
2507 AvARRAY (av) = ary;
2508#else
2509 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2510 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2511 SvPVX ((SV *)av) = (char *)ary;
2512#endif
2513 AvMAX (av) = 1;
2514 AvFILLp (av) = 0;
2515 ary [0] = newSViv (count);
2516
2517 return newRV_noinc ((SV *)av);
2518}
2519
2520/* semaphore */
2521
2522static void
2523coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2524{
2525 SV *count_sv = AvARRAY (av)[0];
2526 IV count = SvIVX (count_sv);
2527
2528 count += adjust;
2529 SvIVX (count_sv) = count;
2530
2531 /* now wake up as many waiters as are expected to lock */
2532 while (count > 0 && AvFILLp (av) > 0)
2533 {
2534 SV *cb;
2535
2536 /* swap first two elements so we can shift a waiter */
2537 AvARRAY (av)[0] = AvARRAY (av)[1];
2538 AvARRAY (av)[1] = count_sv;
2539 cb = av_shift (av);
2540
2541 if (SvOBJECT (cb))
2542 {
2543 api_ready (aTHX_ cb);
2544 --count;
2545 }
2546 else if (SvTYPE (cb) == SVt_PVCV)
2547 {
2548 dSP;
2549 PUSHMARK (SP);
2550 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2551 PUTBACK;
2552 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2553 }
2554
2555 SvREFCNT_dec (cb);
2556 }
2557}
2558
2559static void
2560coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2561{
2562 /* call $sem->adjust (0) to possibly wake up some other waiters */
2563 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2564}
2565
1048static void 2566static int
1049api_cede (void) 2567slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1050{ 2568{
1051 struct transfer_args ta; 2569 AV *av = (AV *)frame->data;
2570 SV *count_sv = AvARRAY (av)[0];
1052 2571
1053 prepare_cede (&ta); 2572 /* if we are about to throw, don't actually acquire the lock, just throw */
1054 TRANSFER (ta); 2573 if (CORO_THROW)
1055} 2574 return 0;
2575 else if (SvIVX (count_sv) > 0)
2576 {
2577 SvSTATE_current->on_destroy = 0;
1056 2578
2579 if (acquire)
2580 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2581 else
2582 coro_semaphore_adjust (aTHX_ av, 0);
2583
2584 return 0;
2585 }
2586 else
2587 {
2588 int i;
2589 /* if we were woken up but can't down, we look through the whole */
2590 /* waiters list and only add us if we aren't in there already */
2591 /* this avoids some degenerate memory usage cases */
2592
2593 for (i = 1; i <= AvFILLp (av); ++i)
2594 if (AvARRAY (av)[i] == SvRV (coro_current))
2595 return 1;
2596
2597 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2598 return 1;
2599 }
2600}
2601
2602static int
2603slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2604{
2605 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2606}
2607
2608static int
2609slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2610{
2611 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2612}
2613
2614static void
2615slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2616{
2617 AV *av = (AV *)SvRV (arg [0]);
2618
2619 if (SvIVX (AvARRAY (av)[0]) > 0)
2620 {
2621 frame->data = (void *)av;
2622 frame->prepare = prepare_nop;
2623 }
2624 else
2625 {
2626 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2627
2628 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2629 frame->prepare = prepare_schedule;
2630
2631 /* to avoid race conditions when a woken-up coro gets terminated */
2632 /* we arrange for a temporary on_destroy that calls adjust (0) */
2633 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2634 }
2635}
2636
2637static void
2638slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2639{
2640 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2641 frame->check = slf_check_semaphore_down;
2642}
2643
2644static void
2645slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 if (items >= 2)
2648 {
2649 /* callback form */
2650 AV *av = (AV *)SvRV (arg [0]);
2651 SV *cb_cv = s_get_cv_croak (arg [1]);
2652
2653 av_push (av, SvREFCNT_inc_NN (cb_cv));
2654
2655 if (SvIVX (AvARRAY (av)[0]) > 0)
2656 coro_semaphore_adjust (aTHX_ av, 0);
2657
2658 frame->prepare = prepare_nop;
2659 frame->check = slf_check_nop;
2660 }
2661 else
2662 {
2663 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2664 frame->check = slf_check_semaphore_wait;
2665 }
2666}
2667
2668/* signal */
2669
2670static void
2671coro_signal_wake (pTHX_ AV *av, int count)
2672{
2673 SvIVX (AvARRAY (av)[0]) = 0;
2674
2675 /* now signal count waiters */
2676 while (count > 0 && AvFILLp (av) > 0)
2677 {
2678 SV *cb;
2679
2680 /* swap first two elements so we can shift a waiter */
2681 cb = AvARRAY (av)[0];
2682 AvARRAY (av)[0] = AvARRAY (av)[1];
2683 AvARRAY (av)[1] = cb;
2684
2685 cb = av_shift (av);
2686
2687 if (SvTYPE (cb) == SVt_PVCV)
2688 {
2689 dSP;
2690 PUSHMARK (SP);
2691 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2692 PUTBACK;
2693 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2694 }
2695 else
2696 {
2697 api_ready (aTHX_ cb);
2698 sv_setiv (cb, 0); /* signal waiter */
2699 }
2700
2701 SvREFCNT_dec (cb);
2702
2703 --count;
2704 }
2705}
2706
2707static int
2708slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2709{
2710 /* if we are about to throw, also stop waiting */
2711 return SvROK ((SV *)frame->data) && !CORO_THROW;
2712}
2713
2714static void
2715slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 AV *av = (AV *)SvRV (arg [0]);
2718
2719 if (items >= 2)
2720 {
2721 SV *cb_cv = s_get_cv_croak (arg [1]);
2722 av_push (av, SvREFCNT_inc_NN (cb_cv));
2723
2724 if (SvIVX (AvARRAY (av)[0]))
2725 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2726
2727 frame->prepare = prepare_nop;
2728 frame->check = slf_check_nop;
2729 }
2730 else if (SvIVX (AvARRAY (av)[0]))
2731 {
2732 SvIVX (AvARRAY (av)[0]) = 0;
2733 frame->prepare = prepare_nop;
2734 frame->check = slf_check_nop;
2735 }
2736 else
2737 {
2738 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2739
2740 av_push (av, waiter);
2741
2742 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2743 frame->prepare = prepare_schedule;
2744 frame->check = slf_check_signal_wait;
2745 }
2746}
2747
2748/*****************************************************************************/
2749/* Coro::AIO */
2750
2751#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2752
2753/* helper storage struct */
2754struct io_state
2755{
2756 int errorno;
2757 I32 laststype; /* U16 in 5.10.0 */
2758 int laststatval;
2759 Stat_t statcache;
2760};
2761
2762static void
2763coro_aio_callback (pTHX_ CV *cv)
2764{
2765 dXSARGS;
2766 AV *state = (AV *)S_GENSUB_ARG;
2767 SV *coro = av_pop (state);
2768 SV *data_sv = newSV (sizeof (struct io_state));
2769
2770 av_extend (state, items - 1);
2771
2772 sv_upgrade (data_sv, SVt_PV);
2773 SvCUR_set (data_sv, sizeof (struct io_state));
2774 SvPOK_only (data_sv);
2775
2776 {
2777 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2778
2779 data->errorno = errno;
2780 data->laststype = PL_laststype;
2781 data->laststatval = PL_laststatval;
2782 data->statcache = PL_statcache;
2783 }
2784
2785 /* now build the result vector out of all the parameters and the data_sv */
2786 {
2787 int i;
2788
2789 for (i = 0; i < items; ++i)
2790 av_push (state, SvREFCNT_inc_NN (ST (i)));
2791 }
2792
2793 av_push (state, data_sv);
2794
2795 api_ready (aTHX_ coro);
2796 SvREFCNT_dec (coro);
2797 SvREFCNT_dec ((AV *)state);
2798}
2799
2800static int
2801slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2802{
2803 AV *state = (AV *)frame->data;
2804
2805 /* if we are about to throw, return early */
2806 /* this does not cancel the aio request, but at least */
2807 /* it quickly returns */
2808 if (CORO_THROW)
2809 return 0;
2810
2811 /* one element that is an RV? repeat! */
2812 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2813 return 1;
2814
2815 /* restore status */
2816 {
2817 SV *data_sv = av_pop (state);
2818 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2819
2820 errno = data->errorno;
2821 PL_laststype = data->laststype;
2822 PL_laststatval = data->laststatval;
2823 PL_statcache = data->statcache;
2824
2825 SvREFCNT_dec (data_sv);
2826 }
2827
2828 /* push result values */
2829 {
2830 dSP;
2831 int i;
2832
2833 EXTEND (SP, AvFILLp (state) + 1);
2834 for (i = 0; i <= AvFILLp (state); ++i)
2835 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2836
2837 PUTBACK;
2838 }
2839
2840 return 0;
2841}
2842
2843static void
2844slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2845{
2846 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2847 SV *coro_hv = SvRV (coro_current);
2848 struct coro *coro = SvSTATE_hv (coro_hv);
2849
2850 /* put our coroutine id on the state arg */
2851 av_push (state, SvREFCNT_inc_NN (coro_hv));
2852
2853 /* first see whether we have a non-zero priority and set it as AIO prio */
2854 if (coro->prio)
2855 {
2856 dSP;
2857
2858 static SV *prio_cv;
2859 static SV *prio_sv;
2860
2861 if (expect_false (!prio_cv))
2862 {
2863 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2864 prio_sv = newSViv (0);
2865 }
2866
2867 PUSHMARK (SP);
2868 sv_setiv (prio_sv, coro->prio);
2869 XPUSHs (prio_sv);
2870
2871 PUTBACK;
2872 call_sv (prio_cv, G_VOID | G_DISCARD);
2873 }
2874
2875 /* now call the original request */
2876 {
2877 dSP;
2878 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2879 int i;
2880
2881 PUSHMARK (SP);
2882
2883 /* first push all args to the stack */
2884 EXTEND (SP, items + 1);
2885
2886 for (i = 0; i < items; ++i)
2887 PUSHs (arg [i]);
2888
2889 /* now push the callback closure */
2890 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2891
2892 /* now call the AIO function - we assume our request is uncancelable */
2893 PUTBACK;
2894 call_sv ((SV *)req, G_VOID | G_DISCARD);
2895 }
2896
2897 /* now that the requets is going, we loop toll we have a result */
2898 frame->data = (void *)state;
2899 frame->prepare = prepare_schedule;
2900 frame->check = slf_check_aio_req;
2901}
2902
2903static void
2904coro_aio_req_xs (pTHX_ CV *cv)
2905{
2906 dXSARGS;
2907
2908 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2909
2910 XSRETURN_EMPTY;
2911}
2912
2913/*****************************************************************************/
2914
2915#if CORO_CLONE
2916# include "clone.c"
2917#endif
2918
1057MODULE = Coro::State PACKAGE = Coro::State 2919MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1058 2920
1059PROTOTYPES: DISABLE 2921PROTOTYPES: DISABLE
1060 2922
1061BOOT: 2923BOOT:
1062{ 2924{
1063#ifdef USE_ITHREADS 2925#ifdef USE_ITHREADS
1064 MUTEX_INIT (&coro_mutex); 2926# if CORO_PTHREAD
2927 coro_thx = PERL_GET_CONTEXT;
2928# endif
1065#endif 2929#endif
1066 BOOT_PAGESIZE; 2930 BOOT_PAGESIZE;
1067 2931
2932 cctx_current = cctx_new_empty ();
2933
2934 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2935 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2936
2937 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2938 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2939 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2940
2941 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2942 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2943 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2944
1068 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2945 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1069 2946
2947 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2948 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1070 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2949 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1071 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1072 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1073 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1074 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2950 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1075 2951
1076 main_mainstack = PL_mainstack; 2952 main_mainstack = PL_mainstack;
2953 main_top_env = PL_top_env;
1077 2954
2955 while (main_top_env->je_prev)
2956 main_top_env = main_top_env->je_prev;
2957
2958 {
2959 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2960
2961 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2962 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2963
2964 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2965 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2966 }
2967
1078 coroapi.ver = CORO_API_VERSION; 2968 coroapi.ver = CORO_API_VERSION;
2969 coroapi.rev = CORO_API_REVISION;
2970
1079 coroapi.transfer = api_transfer; 2971 coroapi.transfer = api_transfer;
1080 2972
2973 coroapi.sv_state = SvSTATE_;
2974 coroapi.execute_slf = api_execute_slf;
2975 coroapi.prepare_nop = prepare_nop;
2976 coroapi.prepare_schedule = prepare_schedule;
2977 coroapi.prepare_cede = prepare_cede;
2978 coroapi.prepare_cede_notself = prepare_cede_notself;
2979
2980 {
2981 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2982
2983 if (!svp) croak ("Time::HiRes is required");
2984 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2985
2986 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2987
2988 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2989 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
2990 }
2991
1081 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2992 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1082} 2993}
1083 2994
1084SV * 2995SV *
1085new (char *klass, ...) 2996new (char *klass, ...)
2997 ALIAS:
2998 Coro::new = 1
1086 CODE: 2999 CODE:
1087{ 3000{
1088 struct coro *coro; 3001 struct coro *coro;
3002 MAGIC *mg;
1089 HV *hv; 3003 HV *hv;
3004 SV *cb;
1090 int i; 3005 int i;
1091 3006
3007 if (items > 1)
3008 {
3009 cb = s_get_cv_croak (ST (1));
3010
3011 if (!ix)
3012 {
3013 if (CvISXSUB (cb))
3014 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3015
3016 if (!CvROOT (cb))
3017 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3018 }
3019 }
3020
1092 Newz (0, coro, 1, struct coro); 3021 Newz (0, coro, 1, struct coro);
1093 coro->args = newAV (); 3022 coro->args = newAV ();
1094 coro->save = CORO_SAVE_ALL;
1095 coro->flags = CF_NEW; 3023 coro->flags = CF_NEW;
1096 3024
3025 if (coro_first) coro_first->prev = coro;
3026 coro->next = coro_first;
3027 coro_first = coro;
3028
1097 hv = newHV (); 3029 coro->hv = hv = newHV ();
1098 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3030 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3031 mg->mg_flags |= MGf_DUP;
1099 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3032 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1100 3033
3034 if (items > 1)
3035 {
3036 av_extend (coro->args, items - 1 + ix - 1);
3037
3038 if (ix)
3039 {
3040 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3041 cb = (SV *)cv_coro_run;
3042 }
3043
3044 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3045
1101 for (i = 1; i < items; i++) 3046 for (i = 2; i < items; i++)
1102 av_push (coro->args, newSVsv (ST (i))); 3047 av_push (coro->args, newSVsv (ST (i)));
3048 }
1103} 3049}
1104 OUTPUT: 3050 OUTPUT:
1105 RETVAL 3051 RETVAL
1106 3052
1107int 3053void
1108save (SV *coro, int new_save = -1) 3054transfer (...)
3055 PROTOTYPE: $$
1109 CODE: 3056 CODE:
1110 RETVAL = api_save (coro, new_save); 3057 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3058
3059bool
3060_destroy (SV *coro_sv)
3061 CODE:
3062 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1111 OUTPUT: 3063 OUTPUT:
1112 RETVAL 3064 RETVAL
1113 3065
1114void 3066void
1115_set_stacklevel (...)
1116 ALIAS:
1117 Coro::State::transfer = 1
1118 Coro::schedule = 2
1119 Coro::cede = 3
1120 CODE:
1121{
1122 struct transfer_args ta;
1123
1124 switch (ix)
1125 {
1126 case 0:
1127 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1128 ta.next = 0;
1129 break;
1130
1131 case 1:
1132 if (items != 2)
1133 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1134
1135 prepare_transfer (&ta, ST (0), ST (1));
1136 break;
1137
1138 case 2:
1139 prepare_schedule (&ta);
1140 break;
1141
1142 case 3:
1143 prepare_cede (&ta);
1144 break;
1145 }
1146
1147 TRANSFER (ta);
1148}
1149
1150void
1151_clone_state_from (SV *dst, SV *src)
1152 CODE:
1153{
1154 struct coro *coro_src = SvSTATE (src);
1155
1156 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1157
1158 ++coro_src->refcnt;
1159 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1160}
1161
1162void
1163_exit (code) 3067_exit (int code)
1164 int code
1165 PROTOTYPE: $ 3068 PROTOTYPE: $
1166 CODE: 3069 CODE:
1167 _exit (code); 3070 _exit (code);
1168 3071
3072SV *
3073clone (Coro::State coro)
3074 CODE:
3075{
3076#if CORO_CLONE
3077 struct coro *ncoro = coro_clone (aTHX_ coro);
3078 MAGIC *mg;
3079 /* TODO: too much duplication */
3080 ncoro->hv = newHV ();
3081 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3082 mg->mg_flags |= MGf_DUP;
3083 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3084#else
3085 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3086#endif
3087}
3088 OUTPUT:
3089 RETVAL
3090
3091int
3092cctx_stacksize (int new_stacksize = 0)
3093 PROTOTYPE: ;$
3094 CODE:
3095 RETVAL = cctx_stacksize;
3096 if (new_stacksize)
3097 {
3098 cctx_stacksize = new_stacksize;
3099 ++cctx_gen;
3100 }
3101 OUTPUT:
3102 RETVAL
3103
3104int
3105cctx_max_idle (int max_idle = 0)
3106 PROTOTYPE: ;$
3107 CODE:
3108 RETVAL = cctx_max_idle;
3109 if (max_idle > 1)
3110 cctx_max_idle = max_idle;
3111 OUTPUT:
3112 RETVAL
3113
1169int 3114int
1170cctx_count () 3115cctx_count ()
3116 PROTOTYPE:
1171 CODE: 3117 CODE:
1172 RETVAL = cctx_count; 3118 RETVAL = cctx_count;
1173 OUTPUT: 3119 OUTPUT:
1174 RETVAL 3120 RETVAL
1175 3121
1176int 3122int
1177cctx_idle () 3123cctx_idle ()
3124 PROTOTYPE:
1178 CODE: 3125 CODE:
1179 RETVAL = cctx_idle; 3126 RETVAL = cctx_idle;
1180 OUTPUT: 3127 OUTPUT:
1181 RETVAL 3128 RETVAL
1182 3129
3130void
3131list ()
3132 PROTOTYPE:
3133 PPCODE:
3134{
3135 struct coro *coro;
3136 for (coro = coro_first; coro; coro = coro->next)
3137 if (coro->hv)
3138 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3139}
3140
3141void
3142call (Coro::State coro, SV *coderef)
3143 ALIAS:
3144 eval = 1
3145 CODE:
3146{
3147 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3148 {
3149 struct coro *current = SvSTATE_current;
3150
3151 if (current != coro)
3152 {
3153 PUTBACK;
3154 save_perl (aTHX_ current);
3155 load_perl (aTHX_ coro);
3156 SPAGAIN;
3157 }
3158
3159 PUSHSTACK;
3160
3161 PUSHMARK (SP);
3162 PUTBACK;
3163
3164 if (ix)
3165 eval_sv (coderef, 0);
3166 else
3167 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3168
3169 POPSTACK;
3170 SPAGAIN;
3171
3172 if (current != coro)
3173 {
3174 PUTBACK;
3175 save_perl (aTHX_ coro);
3176 load_perl (aTHX_ current);
3177 SPAGAIN;
3178 }
3179 }
3180}
3181
3182SV *
3183is_ready (Coro::State coro)
3184 PROTOTYPE: $
3185 ALIAS:
3186 is_ready = CF_READY
3187 is_running = CF_RUNNING
3188 is_new = CF_NEW
3189 is_destroyed = CF_DESTROYED
3190 is_suspended = CF_SUSPENDED
3191 CODE:
3192 RETVAL = boolSV (coro->flags & ix);
3193 OUTPUT:
3194 RETVAL
3195
3196void
3197throw (Coro::State self, SV *throw = &PL_sv_undef)
3198 PROTOTYPE: $;$
3199 CODE:
3200{
3201 struct coro *current = SvSTATE_current;
3202 SV **throwp = self == current ? &CORO_THROW : &self->except;
3203 SvREFCNT_dec (*throwp);
3204 SvGETMAGIC (throw);
3205 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3206}
3207
3208void
3209api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3210 PROTOTYPE: $;$
3211 C_ARGS: aTHX_ coro, flags
3212
3213SV *
3214has_cctx (Coro::State coro)
3215 PROTOTYPE: $
3216 CODE:
3217 /* maybe manage the running flag differently */
3218 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3219 OUTPUT:
3220 RETVAL
3221
3222int
3223is_traced (Coro::State coro)
3224 PROTOTYPE: $
3225 CODE:
3226 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3227 OUTPUT:
3228 RETVAL
3229
3230UV
3231rss (Coro::State coro)
3232 PROTOTYPE: $
3233 ALIAS:
3234 usecount = 1
3235 CODE:
3236 switch (ix)
3237 {
3238 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3239 case 1: RETVAL = coro->usecount; break;
3240 }
3241 OUTPUT:
3242 RETVAL
3243
3244void
3245force_cctx ()
3246 PROTOTYPE:
3247 CODE:
3248 cctx_current->idle_sp = 0;
3249
3250void
3251swap_defsv (Coro::State self)
3252 PROTOTYPE: $
3253 ALIAS:
3254 swap_defav = 1
3255 CODE:
3256 if (!self->slot)
3257 croak ("cannot swap state with coroutine that has no saved state,");
3258 else
3259 {
3260 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3261 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3262
3263 SV *tmp = *src; *src = *dst; *dst = tmp;
3264 }
3265
3266void
3267cancel (Coro::State self)
3268 CODE:
3269 coro_state_destroy (aTHX_ self);
3270 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3271
3272
3273SV *
3274enable_times (int enabled = enable_times)
3275 CODE:
3276{
3277 RETVAL = boolSV (enable_times);
3278
3279 if (enabled != enable_times)
3280 {
3281 enable_times = enabled;
3282
3283 coro_times_update ();
3284 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3285 }
3286}
3287 OUTPUT:
3288 RETVAL
3289
3290void
3291times (Coro::State self)
3292 PPCODE:
3293{
3294 struct coro *current = SvSTATE (coro_current);
3295
3296 if (expect_false (current == self))
3297 {
3298 coro_times_update ();
3299 coro_times_add (SvSTATE (coro_current));
3300 }
3301
3302 EXTEND (SP, 2);
3303 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3304 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3305
3306 if (expect_false (current == self))
3307 coro_times_sub (SvSTATE (coro_current));
3308}
3309
1183MODULE = Coro::State PACKAGE = Coro 3310MODULE = Coro::State PACKAGE = Coro
1184 3311
1185BOOT: 3312BOOT:
1186{ 3313{
1187 int i; 3314 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3315 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3316 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3317 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3318 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3319 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3320 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3321 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3322 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1188 3323
3324 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3325 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3326 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3327 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3328
1189 coro_stash = gv_stashpv ("Coro", TRUE); 3329 coro_stash = gv_stashpv ("Coro", TRUE);
1190 3330
1191 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3331 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1192 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3332 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1193 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3333 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1194 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3334 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1195 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3335 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1196 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3336 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1197
1198 coro_current = get_sv ("Coro::current", FALSE);
1199 SvREADONLY_on (coro_current);
1200
1201 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1202 coro_ready[i] = newAV ();
1203 3337
1204 { 3338 {
1205 SV *sv = perl_get_sv("Coro::API", 1); 3339 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1206 3340
1207 coroapi.schedule = api_schedule; 3341 coroapi.schedule = api_schedule;
1208 coroapi.save = api_save; 3342 coroapi.schedule_to = api_schedule_to;
1209 coroapi.cede = api_cede; 3343 coroapi.cede = api_cede;
3344 coroapi.cede_notself = api_cede_notself;
1210 coroapi.ready = api_ready; 3345 coroapi.ready = api_ready;
1211 coroapi.is_ready = api_is_ready; 3346 coroapi.is_ready = api_is_ready;
1212 coroapi.nready = &coro_nready; 3347 coroapi.nready = coro_nready;
1213 coroapi.current = coro_current; 3348 coroapi.current = coro_current;
1214 3349
1215 GCoroAPI = &coroapi; 3350 /*GCoroAPI = &coroapi;*/
1216 sv_setiv (sv, (IV)&coroapi); 3351 sv_setiv (sv, (IV)&coroapi);
1217 SvREADONLY_on (sv); 3352 SvREADONLY_on (sv);
1218 } 3353 }
1219} 3354}
3355
3356void
3357terminate (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3360
3361void
3362schedule (...)
3363 CODE:
3364 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3365
3366void
3367schedule_to (...)
3368 CODE:
3369 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3370
3371void
3372cede_to (...)
3373 CODE:
3374 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3375
3376void
3377cede (...)
3378 CODE:
3379 CORO_EXECUTE_SLF_XS (slf_init_cede);
3380
3381void
3382cede_notself (...)
3383 CODE:
3384 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1220 3385
1221void 3386void
1222_set_current (SV *current) 3387_set_current (SV *current)
1223 PROTOTYPE: $ 3388 PROTOTYPE: $
1224 CODE: 3389 CODE:
1225 SvREFCNT_dec (SvRV (coro_current)); 3390 SvREFCNT_dec (SvRV (coro_current));
1226 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3391 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3392
3393void
3394_set_readyhook (SV *hook)
3395 PROTOTYPE: $
3396 CODE:
3397 SvREFCNT_dec (coro_readyhook);
3398 SvGETMAGIC (hook);
3399 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1227 3400
1228int 3401int
1229prio (Coro::State coro, int newprio = 0) 3402prio (Coro::State coro, int newprio = 0)
3403 PROTOTYPE: $;$
1230 ALIAS: 3404 ALIAS:
1231 nice = 1 3405 nice = 1
1232 CODE: 3406 CODE:
1233{ 3407{
1234 RETVAL = coro->prio; 3408 RETVAL = coro->prio;
1235 3409
1236 if (items > 1) 3410 if (items > 1)
1237 { 3411 {
1238 if (ix) 3412 if (ix)
1239 newprio += coro->prio; 3413 newprio = coro->prio - newprio;
1240 3414
1241 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3415 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1242 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3416 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1243 3417
1244 coro->prio = newprio; 3418 coro->prio = newprio;
1245 } 3419 }
1246} 3420}
3421 OUTPUT:
3422 RETVAL
1247 3423
1248SV * 3424SV *
1249ready (SV *self) 3425ready (SV *self)
1250 PROTOTYPE: $ 3426 PROTOTYPE: $
1251 CODE: 3427 CODE:
1252 RETVAL = boolSV (api_ready (self)); 3428 RETVAL = boolSV (api_ready (aTHX_ self));
1253 OUTPUT:
1254 RETVAL
1255
1256SV *
1257is_ready (SV *self)
1258 PROTOTYPE: $
1259 CODE:
1260 RETVAL = boolSV (api_is_ready (self));
1261 OUTPUT: 3429 OUTPUT:
1262 RETVAL 3430 RETVAL
1263 3431
1264int 3432int
1265nready (...) 3433nready (...)
… …
1267 CODE: 3435 CODE:
1268 RETVAL = coro_nready; 3436 RETVAL = coro_nready;
1269 OUTPUT: 3437 OUTPUT:
1270 RETVAL 3438 RETVAL
1271 3439
1272MODULE = Coro::State PACKAGE = Coro::AIO 3440void
3441suspend (Coro::State self)
3442 PROTOTYPE: $
3443 CODE:
3444 self->flags |= CF_SUSPENDED;
3445
3446void
3447resume (Coro::State self)
3448 PROTOTYPE: $
3449 CODE:
3450 self->flags &= ~CF_SUSPENDED;
3451
3452void
3453_pool_handler (...)
3454 CODE:
3455 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3456
3457void
3458async_pool (SV *cv, ...)
3459 PROTOTYPE: &@
3460 PPCODE:
3461{
3462 HV *hv = (HV *)av_pop (av_async_pool);
3463 AV *av = newAV ();
3464 SV *cb = ST (0);
3465 int i;
3466
3467 av_extend (av, items - 2);
3468 for (i = 1; i < items; ++i)
3469 av_push (av, SvREFCNT_inc_NN (ST (i)));
3470
3471 if ((SV *)hv == &PL_sv_undef)
3472 {
3473 PUSHMARK (SP);
3474 EXTEND (SP, 2);
3475 PUSHs (sv_Coro);
3476 PUSHs ((SV *)cv_pool_handler);
3477 PUTBACK;
3478 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3479 SPAGAIN;
3480
3481 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3482 }
3483
3484 {
3485 struct coro *coro = SvSTATE_hv (hv);
3486
3487 assert (!coro->invoke_cb);
3488 assert (!coro->invoke_av);
3489 coro->invoke_cb = SvREFCNT_inc (cb);
3490 coro->invoke_av = av;
3491 }
3492
3493 api_ready (aTHX_ (SV *)hv);
3494
3495 if (GIMME_V != G_VOID)
3496 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3497 else
3498 SvREFCNT_dec (hv);
3499}
1273 3500
1274SV * 3501SV *
1275_get_state () 3502rouse_cb ()
3503 PROTOTYPE:
1276 CODE: 3504 CODE:
1277{ 3505 RETVAL = coro_new_rouse_cb (aTHX);
1278 struct io_state *data;
1279
1280 RETVAL = newSV (sizeof (struct io_state));
1281 data = (struct io_state *)SvPVX (RETVAL);
1282 SvCUR_set (RETVAL, sizeof (struct io_state));
1283 SvPOK_only (RETVAL);
1284
1285 data->errorno = errno;
1286 data->laststype = PL_laststype;
1287 data->laststatval = PL_laststatval;
1288 data->statcache = PL_statcache;
1289}
1290 OUTPUT: 3506 OUTPUT:
1291 RETVAL 3507 RETVAL
1292 3508
1293void 3509void
1294_set_state (char *data_) 3510rouse_wait (...)
3511 PROTOTYPE: ;$
3512 PPCODE:
3513 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3514
3515void
3516on_enter (SV *block)
3517 ALIAS:
3518 on_leave = 1
1295 PROTOTYPE: $ 3519 PROTOTYPE: &
1296 CODE: 3520 CODE:
1297{ 3521{
1298 struct io_state *data = (void *)data_; 3522 struct coro *coro = SvSTATE_current;
3523 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1299 3524
1300 errno = data->errorno; 3525 block = s_get_cv_croak (block);
1301 PL_laststype = data->laststype;
1302 PL_laststatval = data->laststatval;
1303 PL_statcache = data->statcache;
1304}
1305 3526
3527 if (!*avp)
3528 *avp = newAV ();
3529
3530 av_push (*avp, SvREFCNT_inc (block));
3531
3532 if (!ix)
3533 on_enterleave_call (aTHX_ block);
3534
3535 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3536 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3537 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3538}
3539
3540
3541MODULE = Coro::State PACKAGE = PerlIO::cede
3542
3543BOOT:
3544 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3545
3546
3547MODULE = Coro::State PACKAGE = Coro::Semaphore
3548
3549SV *
3550new (SV *klass, SV *count = 0)
3551 CODE:
3552{
3553 int semcnt = 1;
3554
3555 if (count)
3556 {
3557 SvGETMAGIC (count);
3558
3559 if (SvOK (count))
3560 semcnt = SvIV (count);
3561 }
3562
3563 RETVAL = sv_bless (
3564 coro_waitarray_new (aTHX_ semcnt),
3565 GvSTASH (CvGV (cv))
3566 );
3567}
3568 OUTPUT:
3569 RETVAL
3570
3571# helper for Coro::Channel and others
3572SV *
3573_alloc (int count)
3574 CODE:
3575 RETVAL = coro_waitarray_new (aTHX_ count);
3576 OUTPUT:
3577 RETVAL
3578
3579SV *
3580count (SV *self)
3581 CODE:
3582 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3583 OUTPUT:
3584 RETVAL
3585
3586void
3587up (SV *self, int adjust = 1)
3588 ALIAS:
3589 adjust = 1
3590 CODE:
3591 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3592
3593void
3594down (...)
3595 CODE:
3596 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3597
3598void
3599wait (...)
3600 CODE:
3601 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3602
3603void
3604try (SV *self)
3605 PPCODE:
3606{
3607 AV *av = (AV *)SvRV (self);
3608 SV *count_sv = AvARRAY (av)[0];
3609 IV count = SvIVX (count_sv);
3610
3611 if (count > 0)
3612 {
3613 --count;
3614 SvIVX (count_sv) = count;
3615 XSRETURN_YES;
3616 }
3617 else
3618 XSRETURN_NO;
3619}
3620
3621void
3622waiters (SV *self)
3623 PPCODE:
3624{
3625 AV *av = (AV *)SvRV (self);
3626 int wcount = AvFILLp (av) + 1 - 1;
3627
3628 if (GIMME_V == G_SCALAR)
3629 XPUSHs (sv_2mortal (newSViv (wcount)));
3630 else
3631 {
3632 int i;
3633 EXTEND (SP, wcount);
3634 for (i = 1; i <= wcount; ++i)
3635 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3636 }
3637}
3638
3639MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3640
3641void
3642_may_delete (SV *sem, int count, int extra_refs)
3643 PPCODE:
3644{
3645 AV *av = (AV *)SvRV (sem);
3646
3647 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3648 && AvFILLp (av) == 0 /* no waiters, just count */
3649 && SvIV (AvARRAY (av)[0]) == count)
3650 XSRETURN_YES;
3651
3652 XSRETURN_NO;
3653}
3654
3655MODULE = Coro::State PACKAGE = Coro::Signal
3656
3657SV *
3658new (SV *klass)
3659 CODE:
3660 RETVAL = sv_bless (
3661 coro_waitarray_new (aTHX_ 0),
3662 GvSTASH (CvGV (cv))
3663 );
3664 OUTPUT:
3665 RETVAL
3666
3667void
3668wait (...)
3669 CODE:
3670 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3671
3672void
3673broadcast (SV *self)
3674 CODE:
3675{
3676 AV *av = (AV *)SvRV (self);
3677 coro_signal_wake (aTHX_ av, AvFILLp (av));
3678}
3679
3680void
3681send (SV *self)
3682 CODE:
3683{
3684 AV *av = (AV *)SvRV (self);
3685
3686 if (AvFILLp (av))
3687 coro_signal_wake (aTHX_ av, 1);
3688 else
3689 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3690}
3691
3692IV
3693awaited (SV *self)
3694 CODE:
3695 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3696 OUTPUT:
3697 RETVAL
3698
3699
3700MODULE = Coro::State PACKAGE = Coro::AnyEvent
3701
3702BOOT:
3703 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3704
3705void
3706_schedule (...)
3707 CODE:
3708{
3709 static int incede;
3710
3711 api_cede_notself (aTHX);
3712
3713 ++incede;
3714 while (coro_nready >= incede && api_cede (aTHX))
3715 ;
3716
3717 sv_setsv (sv_activity, &PL_sv_undef);
3718 if (coro_nready >= incede)
3719 {
3720 PUSHMARK (SP);
3721 PUTBACK;
3722 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3723 }
3724
3725 --incede;
3726}
3727
3728
3729MODULE = Coro::State PACKAGE = Coro::AIO
3730
3731void
3732_register (char *target, char *proto, SV *req)
3733 CODE:
3734{
3735 SV *req_cv = s_get_cv_croak (req);
3736 /* newXSproto doesn't return the CV on 5.8 */
3737 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3738 sv_setpv ((SV *)slf_cv, proto);
3739 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3740}
3741
3742MODULE = Coro::State PACKAGE = Coro::Select
3743
3744void
3745patch_pp_sselect ()
3746 CODE:
3747 if (!coro_old_pp_sselect)
3748 {
3749 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3750 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3751 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3752 }
3753
3754void
3755unpatch_pp_sselect ()
3756 CODE:
3757 if (coro_old_pp_sselect)
3758 {
3759 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3760 coro_old_pp_sselect = 0;
3761 }
3762
3763

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