ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.113 by root, Thu Nov 30 20:54:24 2006 UTC vs.
Revision 1.380 by root, Sun Sep 12 03:06:38 2010 UTC

1#define NDEBUG 1
2
1#include "libcoro/coro.c" 3#include "libcoro/coro.c"
4
5#define PERL_NO_GET_CONTEXT
6#define PERL_EXT
2 7
3#include "EXTERN.h" 8#include "EXTERN.h"
4#include "perl.h" 9#include "perl.h"
5#include "XSUB.h" 10#include "XSUB.h"
11#include "perliol.h"
6 12
7#include "patchlevel.h" 13#include "schmorp.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 14
40#include <stdio.h> 15#include <stdio.h>
41#include <errno.h> 16#include <errno.h>
17#include <assert.h>
42 18
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 19#ifndef SVs_PADSTALE
44# undef STACKGUARD 20# define SVs_PADSTALE 0
45#endif 21#endif
46 22
47#ifndef STACKGUARD 23#ifdef WIN32
48# define STACKGUARD 0 24# undef setjmp
25# undef longjmp
26# undef _exit
27# define setjmp _setjmp /* deep magic */
28#else
29# include <inttypes.h> /* most portable stdint.h */
49#endif 30#endif
50 31
51#ifdef HAVE_MMAP 32#ifdef HAVE_MMAP
52# include <unistd.h> 33# include <unistd.h>
53# include <sys/mman.h> 34# include <sys/mman.h>
… …
69#else 50#else
70# define PAGESIZE 0 51# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 52# define BOOT_PAGESIZE (void)0
72#endif 53#endif
73 54
74/* The next macro should declare a variable stacklevel that contains and approximation 55#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 56# include <valgrind/valgrind.h>
76 * and should be unique. */ 57#endif
58
59/* the maximum number of idle cctx that will be pooled */
60static int cctx_max_idle = 4;
61
62#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
63# undef CORO_STACKGUARD
64#endif
65
66#ifndef CORO_STACKGUARD
67# define CORO_STACKGUARD 0
68#endif
69
70/* prefer perl internal functions over our own? */
71#ifndef CORO_PREFER_PERL_FUNCTIONS
72# define CORO_PREFER_PERL_FUNCTIONS 0
73#endif
74
75/* The next macros try to return the current stack pointer, in an as
76 * portable way as possible. */
77#if __GNUC__ >= 4
77#define dSTACKLEVEL int stacklevel 78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
81# define dSTACKLEVEL volatile void *stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 82# define STACKLEVEL ((void *)&stacklevel)
83#endif
79 84
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 85#define IN_DESTRUCT PL_dirty
81 86
82#if __GNUC__ >= 3 87#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 88# define attribute(x) __attribute__(x)
89# define expect(expr,value) __builtin_expect ((expr), (value))
90# define INLINE static inline
84#else 91#else
85# define attribute(x) 92# define attribute(x)
93# define expect(expr,value) (expr)
94# define INLINE static
86#endif 95#endif
87 96
97#define expect_false(expr) expect ((expr) != 0, 0)
98#define expect_true(expr) expect ((expr) != 0, 1)
99
88#define NOINLINE attribute ((noinline)) 100#define NOINLINE attribute ((noinline))
89 101
90#include "CoroAPI.h" 102#include "CoroAPI.h"
91 103#define GCoroAPI (&coroapi) /* very sneaky */
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 104
94#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 106# if CORO_PTHREAD
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 108# endif
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif 109#endif
102 110
111#ifdef __linux
112# include <time.h> /* for timespec */
113# include <syscall.h> /* for SYS_* */
114# ifdef SYS_clock_gettime
115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
116# define CORO_CLOCK_MONOTONIC 1
117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
118# endif
119#endif
120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127
128static U32 cctx_gen;
129static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 130static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 131static AV *main_mainstack; /* used to differentiate between $main and others */
132static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 133static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 134static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
135
136static AV *av_destroy; /* destruction queue */
137static SV *sv_manager; /* the manager coro */
138static SV *sv_idle; /* $Coro::idle */
139
140static GV *irsgv; /* $/ */
141static GV *stdoutgv; /* *STDOUT */
142static SV *rv_diehook;
143static SV *rv_warnhook;
144static HV *hv_sig; /* %SIG */
145
146/* async_pool helper stuff */
147static SV *sv_pool_rss;
148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
107 162
108static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
110 165
166enum {
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
111/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 176typedef struct coro_cctx
177{
113 struct coro_cctx *next; 178 struct coro_cctx *next;
114 179
115 /* the stack */ 180 /* the stack */
116 void *sptr; 181 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 182 size_t ssize;
118 183
119 /* cpu state */ 184 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 187 JMPENV *top_env;
122 coro_context cctx; 188 coro_context cctx;
123 189
124 int inuse; 190 U32 gen;
125
126#if USE_VALGRIND 191#if CORO_USE_VALGRIND
127 int valgrind_id; 192 int valgrind_id;
128#endif 193#endif
194 unsigned char flags;
129} coro_cctx; 195} coro_cctx;
130 196
197coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
131enum { 201enum {
132 CF_RUNNING, /* coroutine is running */ 202 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 203 CF_READY = 0x0002, /* coroutine is ready */
204 CF_NEW = 0x0004, /* has never been switched to */
205 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
206 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
134}; 207};
135 208
136/* this is a structure representing a perl-level coroutine */ 209/* the structure where most of the perl state is stored, overlaid on the cxstack */
137struct coro { 210typedef struct
138 /* the c coroutine allocated to this perl coroutine, if any */ 211{
139 coro_cctx *cctx; 212 SV *defsv;
140
141 /* data associated with this coroutine (initial args) */
142 AV *args;
143 int refcnt;
144 int flags;
145
146 /* optionally saved, might be zero */
147 AV *defav; 213 AV *defav;
148 SV *defsv;
149 SV *errsv; 214 SV *errsv;
150 215 SV *irsgv;
216 HV *hinthv;
151#define VAR(name,type) type name; 217#define VAR(name,type) type name;
152# include "state.h" 218# include "state.h"
153#undef VAR 219#undef VAR
220} perl_slots;
221
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
223
224/* this is a structure representing a perl-level coroutine */
225struct coro {
226 /* the C coroutine allocated to this perl coroutine, if any */
227 coro_cctx *cctx;
228
229 /* ready queue */
230 struct coro *next_ready;
231
232 /* state data */
233 struct CoroSLF slf_frame; /* saved slf frame */
234 AV *mainstack;
235 perl_slots *slot; /* basically the saved sp */
236
237 CV *startcv; /* the CV to execute */
238 AV *args; /* data associated with this coroutine (initial args) */
239 int refcnt; /* coroutines are refcounted, yes */
240 int flags; /* CF_ flags */
241 HV *hv; /* the perl hash associated with this coro, if any */
242 void (*on_destroy)(pTHX_ struct coro *coro);
243
244 /* statistics */
245 int usecount; /* number of transfers to this coro */
154 246
155 /* coro process data */ 247 /* coro process data */
156 int prio; 248 int prio;
249 SV *except; /* exception to be thrown */
250 SV *rouse_cb;
251
252 /* async_pool */
253 SV *saved_deffh;
254 SV *invoke_cb;
255 AV *invoke_av;
256
257 /* on_enter/on_leave */
258 AV *on_enter;
259 AV *on_leave;
260
261 /* swap_sv */
262 AV *swap_sv;
263
264 /* times */
265 coro_ts t_cpu, t_real;
266
267 /* linked list */
268 struct coro *next, *prev;
157}; 269};
158 270
159typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
161 273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278
279/** Coro ********************************************************************/
280
281#define CORO_PRIO_MAX 3
282#define CORO_PRIO_HIGH 1
283#define CORO_PRIO_NORMAL 0
284#define CORO_PRIO_LOW -1
285#define CORO_PRIO_IDLE -3
286#define CORO_PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
292static CV *cv_coro_run, *cv_coro_terminate;
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** Coro::Select ************************************************************/
297
298static OP *(*coro_old_pp_sselect) (pTHX);
299static SV *coro_select_select;
300
301/* horrible hack, but if it works... */
302static OP *
303coro_pp_sselect (pTHX)
304{
305 dSP;
306 PUSHMARK (SP - 4); /* fake argument list */
307 XPUSHs (coro_select_select);
308 PUTBACK;
309
310 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
311 PL_op->op_flags |= OPf_STACKED;
312 PL_op->op_private = 0;
313 return PL_ppaddr [OP_ENTERSUB](aTHX);
314}
315
316/** lowlevel stuff **********************************************************/
317
318static SV *
319coro_get_sv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_sv (name, create);
324#endif
325 return get_sv (name, create);
326}
327
162static AV * 328static AV *
329coro_get_av (pTHX_ const char *name, int create)
330{
331#if PERL_VERSION_ATLEAST (5,10,0)
332 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
333 get_av (name, create);
334#endif
335 return get_av (name, create);
336}
337
338static HV *
339coro_get_hv (pTHX_ const char *name, int create)
340{
341#if PERL_VERSION_ATLEAST (5,10,0)
342 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
343 get_hv (name, create);
344#endif
345 return get_hv (name, create);
346}
347
348INLINE void
349coro_times_update ()
350{
351#ifdef coro_clock_gettime
352 struct timespec ts;
353
354 ts.tv_sec = ts.tv_nsec = 0;
355 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
356 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
357
358 ts.tv_sec = ts.tv_nsec = 0;
359 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
360 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
361#else
362 dTHX;
363 UV tv[2];
364
365 u2time (aTHX_ tv);
366 time_real [0] = tv [0];
367 time_real [1] = tv [1] * 1000;
368#endif
369}
370
371INLINE void
372coro_times_add (struct coro *c)
373{
374 c->t_real [1] += time_real [1];
375 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
376 c->t_real [0] += time_real [0];
377
378 c->t_cpu [1] += time_cpu [1];
379 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
380 c->t_cpu [0] += time_cpu [0];
381}
382
383INLINE void
384coro_times_sub (struct coro *c)
385{
386 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
387 c->t_real [1] -= time_real [1];
388 c->t_real [0] -= time_real [0];
389
390 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
391 c->t_cpu [1] -= time_cpu [1];
392 c->t_cpu [0] -= time_cpu [0];
393}
394
395/*****************************************************************************/
396/* magic glue */
397
398#define CORO_MAGIC_type_cv 26
399#define CORO_MAGIC_type_state PERL_MAGIC_ext
400
401#define CORO_MAGIC_NN(sv, type) \
402 (expect_true (SvMAGIC (sv)->mg_type == type) \
403 ? SvMAGIC (sv) \
404 : mg_find (sv, type))
405
406#define CORO_MAGIC(sv, type) \
407 (expect_true (SvMAGIC (sv)) \
408 ? CORO_MAGIC_NN (sv, type) \
409 : 0)
410
411#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
412#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
413
414INLINE struct coro *
415SvSTATE_ (pTHX_ SV *coro)
416{
417 HV *stash;
418 MAGIC *mg;
419
420 if (SvROK (coro))
421 coro = SvRV (coro);
422
423 if (expect_false (SvTYPE (coro) != SVt_PVHV))
424 croak ("Coro::State object required");
425
426 stash = SvSTASH (coro);
427 if (expect_false (stash != coro_stash && stash != coro_state_stash))
428 {
429 /* very slow, but rare, check */
430 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
431 croak ("Coro::State object required");
432 }
433
434 mg = CORO_MAGIC_state (coro);
435 return (struct coro *)mg->mg_ptr;
436}
437
438#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
439
440/* faster than SvSTATE, but expects a coroutine hv */
441#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
442#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443
444/*****************************************************************************/
445/* padlist management and caching */
446
447static AV *
163coro_clone_padlist (CV *cv) 448coro_derive_padlist (pTHX_ CV *cv)
164{ 449{
165 AV *padlist = CvPADLIST (cv); 450 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 451 AV *newpadlist, *newpad;
167 452
168 newpadlist = newAV (); 453 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 454 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 455#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 456 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 457#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 458 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 459#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 460 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist); 461 --AvFILLp (padlist);
177 462
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 463 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
179 av_store (newpadlist, 1, (SV *)newpad); 464 av_store (newpadlist, 1, (SV *)newpad);
180 465
181 return newpadlist; 466 return newpadlist;
182} 467}
183 468
184static void 469static void
185free_padlist (AV *padlist) 470free_padlist (pTHX_ AV *padlist)
186{ 471{
187 /* may be during global destruction */ 472 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 473 if (!IN_DESTRUCT)
189 { 474 {
190 I32 i = AvFILLp (padlist); 475 I32 i = AvFILLp (padlist);
191 while (i >= 0) 476
477 while (i > 0) /* special-case index 0 */
192 { 478 {
193 SV **svp = av_fetch (padlist, i--, FALSE); 479 /* we try to be extra-careful here */
194 if (svp) 480 AV *av = (AV *)AvARRAY (padlist)[i--];
195 { 481 I32 j = AvFILLp (av);
196 SV *sv; 482
197 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 483 while (j >= 0)
484 SvREFCNT_dec (AvARRAY (av)[j--]);
485
486 AvFILLp (av) = -1;
198 SvREFCNT_dec (sv); 487 SvREFCNT_dec (av);
199
200 SvREFCNT_dec (*svp);
201 }
202 } 488 }
203 489
490 SvREFCNT_dec (AvARRAY (padlist)[0]);
491
492 AvFILLp (padlist) = -1;
204 SvREFCNT_dec ((SV*)padlist); 493 SvREFCNT_dec ((SV*)padlist);
205 } 494 }
206} 495}
207 496
208static int 497static int
209coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 498coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
210{ 499{
211 AV *padlist; 500 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 501 AV *av = (AV *)mg->mg_obj;
213 502
503 /* perl manages to free our internal AV and _then_ call us */
504 if (IN_DESTRUCT)
505 return 0;
506
214 /* casting is fun. */ 507 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 508 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 509 free_padlist (aTHX_ padlist);
217 510
218 SvREFCNT_dec (av); 511 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 512
220 return 0; 513 return 0;
221} 514}
222 515
223#define PERL_MAGIC_coro PERL_MAGIC_ext 516static MGVTBL coro_cv_vtbl = {
224 517 0, 0, 0, 0,
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 518 coro_cv_free
226 519};
227#define CORO_MAGIC(cv) \
228 SvMAGIC (cv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230 ? SvMAGIC (cv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
232 : 0
233 520
234/* the next two functions merely cache the padlists */ 521/* the next two functions merely cache the padlists */
235static void 522static void
236get_padlist (CV *cv) 523get_padlist (pTHX_ CV *cv)
237{ 524{
238 MAGIC *mg = CORO_MAGIC (cv); 525 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 526 AV *av;
240 527
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 528 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 529 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 530 else
244 { 531 {
245#if 0 532#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 533 /* this is probably cleaner? but also slower! */
534 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 535 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 536 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 537 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 538 SvREFCNT_dec (cp);
251#else 539#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 540 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
253#endif 541#endif
254 } 542 }
255} 543}
256 544
257static void 545static void
258put_padlist (CV *cv) 546put_padlist (pTHX_ CV *cv)
259{ 547{
260 MAGIC *mg = CORO_MAGIC (cv); 548 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 549 AV *av;
262 550
263 if (!mg) 551 if (expect_false (!mg))
264 { 552 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
265 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267 mg->mg_virtual = &vtbl_coro;
268 mg->mg_obj = (SV *)newAV ();
269 }
270 553
271 av = (AV *)mg->mg_obj; 554 av = (AV *)mg->mg_obj;
272 555
273 if (AvFILLp (av) >= AvMAX (av)) 556 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 557 av_extend (av, AvFILLp (av) + 1);
275 558
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 559 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 560}
278 561
279#define SB do { 562/** load & save, init *******************************************************/
280#define SE } while (0)
281 563
282#define LOAD(state) load_state((state)); 564/* swap sv heads, at least logically */
283#define SAVE(state,flags) save_state((state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286
287static void 565static void
566swap_svs (pTHX_ Coro__State c)
567{
568 int i;
569
570 for (i = 0; i <= AvFILLp (c->swap_sv); )
571 {
572 SV *a = AvARRAY (c->swap_sv)[i++];
573 SV *b = AvARRAY (c->swap_sv)[i++];
574
575 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
576 SV tmp;
577
578 /* swap sv_any */
579 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
580
581 /* swap sv_flags */
582 SvFLAGS (&tmp) = SvFLAGS (a);
583 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
584 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
585
586#if PERL_VERSION_ATLEAST (5,10,0)
587 /* perl 5.10 complicates this _quite_ a bit, but it also is
588 * is much faster, so no quarrels here. alternatively, we could
589 * sv_upgrade to avoid this.
590 */
591 {
592 /* swap sv_u */
593 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
594
595 /* if SvANY points to the head, we need to adjust the pointers,
596 * as the pointer for a still points to b, and maybe vice versa.
597 */
598 #define svany_in_head(type) \
599 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
600
601 if (svany_in_head (SvTYPE (a)))
602 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
603
604 if (svany_in_head (SvTYPE (b)))
605 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
606 }
607#endif
608 }
609}
610
611#define SWAP_SVS(coro) \
612 if (expect_false ((coro)->swap_sv)) \
613 swap_svs (aTHX_ (coro))
614
615static void
616on_enterleave_call (pTHX_ SV *cb);
617
618static void
288load_state(Coro__State c) 619load_perl (pTHX_ Coro__State c)
289{ 620{
621 perl_slots *slot = c->slot;
622 c->slot = 0;
623
624 PL_mainstack = c->mainstack;
625
626 GvSV (PL_defgv) = slot->defsv;
627 GvAV (PL_defgv) = slot->defav;
628 GvSV (PL_errgv) = slot->errsv;
629 GvSV (irsgv) = slot->irsgv;
630 GvHV (PL_hintgv) = slot->hinthv;
631
290#define VAR(name,type) PL_ ## name = c->name; 632 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 633 # include "state.h"
292#undef VAR 634 #undef VAR
293
294 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297 635
298 { 636 {
299 dSP; 637 dSP;
638
300 CV *cv; 639 CV *cv;
301 640
302 /* now do the ugly restore mess */ 641 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 642 while (expect_true (cv = (CV *)POPs))
304 { 643 {
305 put_padlist (cv); /* mark this padlist as available */ 644 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 645 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 646 CvPADLIST (cv) = (AV *)POPs;
308 } 647 }
309 648
310 PUTBACK; 649 PUTBACK;
311 } 650 }
312}
313 651
652 slf_frame = c->slf_frame;
653 CORO_THROW = c->except;
654
655 if (expect_false (enable_times))
656 {
657 if (expect_false (!times_valid))
658 coro_times_update ();
659
660 coro_times_sub (c);
661 }
662
663 if (expect_false (c->on_enter))
664 {
665 int i;
666
667 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
668 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
669 }
670
671 SWAP_SVS (c);
672}
673
314static void 674static void
315save_state(Coro__State c, int flags) 675save_perl (pTHX_ Coro__State c)
316{ 676{
677 SWAP_SVS (c);
678
679 if (expect_false (c->on_leave))
680 {
681 int i;
682
683 for (i = AvFILLp (c->on_leave); i >= 0; --i)
684 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
685 }
686
687 times_valid = 0;
688
689 if (expect_false (enable_times))
690 {
691 coro_times_update (); times_valid = 1;
692 coro_times_add (c);
693 }
694
695 c->except = CORO_THROW;
696 c->slf_frame = slf_frame;
697
317 { 698 {
318 dSP; 699 dSP;
319 I32 cxix = cxstack_ix; 700 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 701 PERL_CONTEXT *ccstk = cxstack;
321 PERL_SI *top_si = PL_curstackinfo; 702 PERL_SI *top_si = PL_curstackinfo;
… …
323 /* 704 /*
324 * the worst thing you can imagine happens first - we have to save 705 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 706 * (and reinitialize) all cv's in the whole callchain :(
326 */ 707 */
327 708
328 PUSHs (Nullsv); 709 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 710 /* this loop was inspired by pp_caller */
330 for (;;) 711 for (;;)
331 { 712 {
332 while (cxix >= 0) 713 while (expect_true (cxix >= 0))
333 { 714 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 715 PERL_CONTEXT *cx = &ccstk[cxix--];
335 716
336 if (CxTYPE(cx) == CXt_SUB) 717 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
337 { 718 {
338 CV *cv = cx->blk_sub.cv; 719 CV *cv = cx->blk_sub.cv;
339 720
340 if (CvDEPTH (cv)) 721 if (expect_true (CvDEPTH (cv)))
341 { 722 {
342 EXTEND (SP, 3); 723 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 724 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 725 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 726 PUSHs ((SV *)cv);
347 727
348 CvDEPTH (cv) = 0; 728 CvDEPTH (cv) = 0;
349 get_padlist (cv); 729 get_padlist (aTHX_ cv);
350 } 730 }
351 } 731 }
352#ifdef CXt_FORMAT
353 else if (CxTYPE(cx) == CXt_FORMAT)
354 {
355 /* I never used formats, so how should I know how these are implemented? */
356 /* my bold guess is as a simple, plain sub... */
357 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358 }
359#endif
360 } 732 }
361 733
362 if (top_si->si_type == PERLSI_MAIN) 734 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 735 break;
364 736
365 top_si = top_si->si_prev; 737 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 738 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 739 cxix = top_si->si_cxix;
368 } 740 }
369 741
370 PUTBACK; 742 PUTBACK;
371 } 743 }
372 744
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 745 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 746 /* we manually unroll here, as usually 2 slots is enough */
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 747 if (SLOT_COUNT >= 1) CXINC;
748 if (SLOT_COUNT >= 2) CXINC;
749 if (SLOT_COUNT >= 3) CXINC;
750 {
751 unsigned int i;
752 for (i = 3; i < SLOT_COUNT; ++i)
753 CXINC;
754 }
755 cxstack_ix -= SLOT_COUNT; /* undo allocation */
376 756
757 c->mainstack = PL_mainstack;
758
759 {
760 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
761
762 slot->defav = GvAV (PL_defgv);
763 slot->defsv = DEFSV;
764 slot->errsv = ERRSV;
765 slot->irsgv = GvSV (irsgv);
766 slot->hinthv = GvHV (PL_hintgv);
767
377#define VAR(name,type)c->name = PL_ ## name; 768 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 769 # include "state.h"
379#undef VAR 770 #undef VAR
771 }
380} 772}
381 773
382/* 774/*
383 * allocate various perl stacks. This is an exact copy 775 * allocate various perl stacks. This is almost an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 776 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 777 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 778 * not usually need a lot of stackspace.
387 */ 779 */
780#if CORO_PREFER_PERL_FUNCTIONS
781# define coro_init_stacks(thx) init_stacks ()
782#else
388static void 783static void
389coro_init_stacks () 784coro_init_stacks (pTHX)
390{ 785{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 786 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 787 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 788 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 789 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 790
396 PL_stack_base = AvARRAY(PL_curstack); 791 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 792 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 793 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 794
400 New(50,PL_tmps_stack,96,SV*); 795 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 796 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 797 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 798 PL_tmps_max = 32;
404 799
405 New(54,PL_markstack,16,I32); 800 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 801 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 802 PL_markstack_max = PL_markstack + 16;
408 803
409#ifdef SET_MARK_OFFSET 804#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 805 SET_MARK_OFFSET;
411#endif 806#endif
412 807
413 New(54,PL_scopestack,16,I32); 808 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 809 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 810 PL_scopestack_max = 8;
416 811
417 New(54,PL_savestack,96,ANY); 812 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 813 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 814 PL_savestack_max = 24;
420 815
421#if !PERL_VERSION_ATLEAST (5,9,0) 816#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 817 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 818 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 819 PL_retstack_max = 4;
425#endif 820#endif
426} 821}
822#endif
427 823
428/* 824/*
429 * destroy the stacks, the callchain etc... 825 * destroy the stacks, the callchain etc...
430 */ 826 */
431static void 827static void
432coro_destroy_stacks () 828coro_destruct_stacks (pTHX)
433{ 829{
434 if (!IN_DESTRUCT)
435 {
436 /* is this ugly, I ask? */
437 LEAVE_SCOPE (0);
438
439 /* sure it is, but more important: is it correct?? :/ */
440 FREETMPS;
441
442 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443 }
444
445 while (PL_curstackinfo->si_next) 830 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 831 PL_curstackinfo = PL_curstackinfo->si_next;
447 832
448 while (PL_curstackinfo) 833 while (PL_curstackinfo)
449 { 834 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 835 PERL_SI *p = PL_curstackinfo->si_prev;
451 836
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 837 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 838 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 839
464 Safefree (PL_curstackinfo->si_cxstack); 840 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 841 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 842 PL_curstackinfo = p;
467 } 843 }
468 844
469 Safefree (PL_tmps_stack); 845 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 846 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 847 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 848 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 849#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 850 Safefree (PL_retstack);
475#endif 851#endif
476} 852}
477 853
854#define CORO_RSS \
855 rss += sizeof (SYM (curstackinfo)); \
856 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
857 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
858 rss += SYM (tmps_max) * sizeof (SV *); \
859 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
860 rss += SYM (scopestack_max) * sizeof (I32); \
861 rss += SYM (savestack_max) * sizeof (ANY);
862
863static size_t
864coro_rss (pTHX_ struct coro *coro)
865{
866 size_t rss = sizeof (*coro);
867
868 if (coro->mainstack)
869 {
870 if (coro->flags & CF_RUNNING)
871 {
872 #define SYM(sym) PL_ ## sym
873 CORO_RSS;
874 #undef SYM
875 }
876 else
877 {
878 #define SYM(sym) coro->slot->sym
879 CORO_RSS;
880 #undef SYM
881 }
882 }
883
884 return rss;
885}
886
887/** coroutine stack handling ************************************************/
888
889static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
890static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
891static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
892
893/* apparently < 5.8.8 */
894#ifndef MgPV_nolen_const
895#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
896 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
897 (const char*)(mg)->mg_ptr)
898#endif
899
900/*
901 * This overrides the default magic get method of %SIG elements.
902 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
903 * and instead of trying to save and restore the hash elements, we just provide
904 * readback here.
905 */
478static void 906static int
479setup_coro (struct coro *coro) 907coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
908{
909 const char *s = MgPV_nolen_const (mg);
910
911 if (*s == '_')
912 {
913 SV **svp = 0;
914
915 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
916 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
917
918 if (svp)
919 {
920 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
921 return 0;
922 }
923 }
924
925 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
926}
927
928static int
929coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
930{
931 const char *s = MgPV_nolen_const (mg);
932
933 if (*s == '_')
934 {
935 SV **svp = 0;
936
937 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
938 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
939
940 if (svp)
941 {
942 SV *old = *svp;
943 *svp = 0;
944 SvREFCNT_dec (old);
945 return 0;
946 }
947 }
948
949 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
950}
951
952static int
953coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
954{
955 const char *s = MgPV_nolen_const (mg);
956
957 if (*s == '_')
958 {
959 SV **svp = 0;
960
961 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
962 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
963
964 if (svp)
965 {
966 SV *old = *svp;
967 *svp = SvOK (sv) ? newSVsv (sv) : 0;
968 SvREFCNT_dec (old);
969 return 0;
970 }
971 }
972
973 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
974}
975
976static void
977prepare_nop (pTHX_ struct coro_transfer_args *ta)
978{
979 /* kind of mega-hacky, but works */
980 ta->next = ta->prev = (struct coro *)ta;
981}
982
983static int
984slf_check_nop (pTHX_ struct CoroSLF *frame)
985{
986 return 0;
987}
988
989static int
990slf_check_repeat (pTHX_ struct CoroSLF *frame)
991{
992 return 1;
993}
994
995static UNOP init_perl_op;
996
997static void NOINLINE /* noinline to keep it out of the transfer fast path */
998init_perl (pTHX_ struct coro *coro)
480{ 999{
481 /* 1000 /*
482 * emulate part of the perl startup here. 1001 * emulate part of the perl startup here.
483 */ 1002 */
484
485 coro_init_stacks (); 1003 coro_init_stacks (aTHX);
486 1004
1005 PL_runops = RUNOPS_DEFAULT;
1006 PL_curcop = &PL_compiling;
1007 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 1008 PL_comppad = 0;
488 PL_in_eval = 0; 1009 PL_comppad_name = 0;
1010 PL_comppad_name_fill = 0;
1011 PL_comppad_name_floor = 0;
489 PL_curpm = 0; 1012 PL_curpm = 0;
1013 PL_curpad = 0;
1014 PL_localizing = 0;
1015 PL_dirty = 0;
1016 PL_restartop = 0;
1017#if PERL_VERSION_ATLEAST (5,10,0)
1018 PL_parser = 0;
1019#endif
1020 PL_hints = 0;
1021
1022 /* recreate the die/warn hooks */
1023 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1024 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1025
1026 GvSV (PL_defgv) = newSV (0);
1027 GvAV (PL_defgv) = coro->args; coro->args = 0;
1028 GvSV (PL_errgv) = newSV (0);
1029 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1030 GvHV (PL_hintgv) = 0;
1031 PL_rs = newSVsv (GvSV (irsgv));
1032 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
490 1033
491 { 1034 {
492 dSP; 1035 dSP;
493 LOGOP myop; 1036 UNOP myop;
494 1037
495 /* I have no idea why this is needed, but it is */ 1038 Zero (&myop, 1, UNOP);
1039 myop.op_next = Nullop;
1040 myop.op_type = OP_ENTERSUB;
1041 myop.op_flags = OPf_WANT_VOID;
1042
496 PUSHMARK (SP); 1043 PUSHMARK (SP);
497 1044 PUSHs ((SV *)coro->startcv);
498 SvREFCNT_dec (GvAV (PL_defgv)); 1045 PUTBACK;
499 GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501 Zero (&myop, 1, LOGOP);
502 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID;
504
505 PL_op = (OP *)&myop; 1046 PL_op = (OP *)&myop;
506
507 PUSHMARK (SP);
508 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509 PUTBACK;
510 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1047 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 1048 }
515}
516 1049
1050 /* this newly created coroutine might be run on an existing cctx which most
1051 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1052 */
1053 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1054 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1055
1056 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1057 init_perl_op.op_next = PL_op;
1058 init_perl_op.op_type = OP_ENTERSUB;
1059 init_perl_op.op_ppaddr = pp_slf;
1060 /* no flags etc. required, as an init function won't be called */
1061
1062 PL_op = (OP *)&init_perl_op;
1063
1064 /* copy throw, in case it was set before init_perl */
1065 CORO_THROW = coro->except;
1066
1067 SWAP_SVS (coro);
1068
1069 if (expect_false (enable_times))
1070 {
1071 coro_times_update ();
1072 coro_times_sub (coro);
1073 }
1074}
1075
517static void 1076static void
1077coro_unwind_stacks (pTHX)
1078{
1079 if (!IN_DESTRUCT)
1080 {
1081 /* restore all saved variables and stuff */
1082 LEAVE_SCOPE (0);
1083 assert (PL_tmps_floor == -1);
1084
1085 /* free all temporaries */
1086 FREETMPS;
1087 assert (PL_tmps_ix == -1);
1088
1089 /* unwind all extra stacks */
1090 POPSTACK_TO (PL_mainstack);
1091
1092 /* unwind main stack */
1093 dounwind (-1);
1094 }
1095}
1096
1097static void
1098destroy_perl (pTHX_ struct coro *coro)
1099{
1100 SV *svf [9];
1101
1102 {
1103 struct coro *current = SvSTATE_current;
1104
1105 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1106
1107 save_perl (aTHX_ current);
1108 load_perl (aTHX_ coro);
1109
1110 coro_unwind_stacks (aTHX);
1111 coro_destruct_stacks (aTHX);
1112
1113 /* restore swapped sv's */
1114 SWAP_SVS (coro);
1115
1116 // now save some sv's to be free'd later
1117 svf [0] = GvSV (PL_defgv);
1118 svf [1] = (SV *)GvAV (PL_defgv);
1119 svf [2] = GvSV (PL_errgv);
1120 svf [3] = (SV *)PL_defoutgv;
1121 svf [4] = PL_rs;
1122 svf [5] = GvSV (irsgv);
1123 svf [6] = (SV *)GvHV (PL_hintgv);
1124 svf [7] = PL_diehook;
1125 svf [8] = PL_warnhook;
1126 assert (9 == sizeof (svf) / sizeof (*svf));
1127
1128 load_perl (aTHX_ current);
1129 }
1130
1131 {
1132 unsigned int i;
1133
1134 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1135 SvREFCNT_dec (svf [i]);
1136
1137 SvREFCNT_dec (coro->saved_deffh);
1138 SvREFCNT_dec (coro->rouse_cb);
1139 SvREFCNT_dec (coro->invoke_cb);
1140 SvREFCNT_dec (coro->invoke_av);
1141 }
1142}
1143
1144INLINE void
518free_coro_mortal () 1145free_coro_mortal (pTHX)
519{ 1146{
520 if (coro_mortal) 1147 if (expect_true (coro_mortal))
521 { 1148 {
522 SvREFCNT_dec (coro_mortal); 1149 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 1150 coro_mortal = 0;
524 } 1151 }
525} 1152}
526 1153
1154static int
1155runops_trace (pTHX)
1156{
1157 COP *oldcop = 0;
1158 int oldcxix = -2;
1159
1160 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1161 {
1162 PERL_ASYNC_CHECK ();
1163
1164 if (cctx_current->flags & CC_TRACE_ALL)
1165 {
1166 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1167 {
1168 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1169 SV **bot, **top;
1170 AV *av = newAV (); /* return values */
1171 SV **cb;
1172 dSP;
1173
1174 GV *gv = CvGV (cx->blk_sub.cv);
1175 SV *fullname = sv_2mortal (newSV (0));
1176 if (isGV (gv))
1177 gv_efullname3 (fullname, gv, 0);
1178
1179 bot = PL_stack_base + cx->blk_oldsp + 1;
1180 top = cx->blk_gimme == G_ARRAY ? SP + 1
1181 : cx->blk_gimme == G_SCALAR ? bot + 1
1182 : bot;
1183
1184 av_extend (av, top - bot);
1185 while (bot < top)
1186 av_push (av, SvREFCNT_inc_NN (*bot++));
1187
1188 PL_runops = RUNOPS_DEFAULT;
1189 ENTER;
1190 SAVETMPS;
1191 EXTEND (SP, 3);
1192 PUSHMARK (SP);
1193 PUSHs (&PL_sv_no);
1194 PUSHs (fullname);
1195 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1196 PUTBACK;
1197 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1198 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1199 SPAGAIN;
1200 FREETMPS;
1201 LEAVE;
1202 PL_runops = runops_trace;
1203 }
1204
1205 if (oldcop != PL_curcop)
1206 {
1207 oldcop = PL_curcop;
1208
1209 if (PL_curcop != &PL_compiling)
1210 {
1211 SV **cb;
1212
1213 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1214 {
1215 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1216
1217 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1218 {
1219 dSP;
1220 GV *gv = CvGV (cx->blk_sub.cv);
1221 SV *fullname = sv_2mortal (newSV (0));
1222
1223 if (isGV (gv))
1224 gv_efullname3 (fullname, gv, 0);
1225
1226 PL_runops = RUNOPS_DEFAULT;
1227 ENTER;
1228 SAVETMPS;
1229 EXTEND (SP, 3);
1230 PUSHMARK (SP);
1231 PUSHs (&PL_sv_yes);
1232 PUSHs (fullname);
1233 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1234 PUTBACK;
1235 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1236 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1237 SPAGAIN;
1238 FREETMPS;
1239 LEAVE;
1240 PL_runops = runops_trace;
1241 }
1242
1243 oldcxix = cxstack_ix;
1244 }
1245
1246 if (cctx_current->flags & CC_TRACE_LINE)
1247 {
1248 dSP;
1249
1250 PL_runops = RUNOPS_DEFAULT;
1251 ENTER;
1252 SAVETMPS;
1253 EXTEND (SP, 3);
1254 PL_runops = RUNOPS_DEFAULT;
1255 PUSHMARK (SP);
1256 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1257 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1258 PUTBACK;
1259 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1260 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1261 SPAGAIN;
1262 FREETMPS;
1263 LEAVE;
1264 PL_runops = runops_trace;
1265 }
1266 }
1267 }
1268 }
1269 }
1270
1271 TAINT_NOT;
1272 return 0;
1273}
1274
1275static struct CoroSLF cctx_ssl_frame;
1276
1277static void
1278slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1279{
1280 ta->prev = 0;
1281}
1282
1283static int
1284slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1285{
1286 *frame = cctx_ssl_frame;
1287
1288 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1289}
1290
1291/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
527static void NOINLINE 1292static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1293cctx_prepare (pTHX)
529{ 1294{
530 dSP;
531 LOGOP myop;
532
533 Zero (&myop, 1, LOGOP);
534 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538
539 PUSHMARK (SP);
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN;
544}
545
546static void
547coro_run (void *arg)
548{
549 /* coro_run is the alternative epilogue of transfer() */
550 UNLOCK;
551
552 /*
553 * this is a _very_ stripped down perl interpreter ;)
554 */
555 PL_top_env = &PL_start_env; 1295 PL_top_env = &PL_start_env;
556 1296
1297 if (cctx_current->flags & CC_TRACE)
1298 PL_runops = runops_trace;
1299
1300 /* we already must be executing an SLF op, there is no other valid way
1301 * that can lead to creation of a new cctx */
1302 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1303 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1304
1305 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1306 cctx_ssl_frame = slf_frame;
1307
1308 slf_frame.prepare = slf_prepare_set_stacklevel;
1309 slf_frame.check = slf_check_set_stacklevel;
1310}
1311
1312/* the tail of transfer: execute stuff we can only do after a transfer */
1313INLINE void
1314transfer_tail (pTHX)
1315{
1316 free_coro_mortal (aTHX);
1317}
1318
1319/*
1320 * this is a _very_ stripped down perl interpreter ;)
1321 */
1322static void
1323cctx_run (void *arg)
1324{
1325#ifdef USE_ITHREADS
1326# if CORO_PTHREAD
1327 PERL_SET_CONTEXT (coro_thx);
1328# endif
1329#endif
1330 {
1331 dTHX;
1332
1333 /* normally we would need to skip the entersub here */
1334 /* not doing so will re-execute it, which is exactly what we want */
1335 /* PL_nop = PL_nop->op_next */
1336
557 /* inject call to cctx_init */ 1337 /* inject a fake subroutine call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg); 1338 cctx_prepare (aTHX);
559 1339
1340 /* cctx_run is the alternative tail of transfer() */
1341 transfer_tail (aTHX);
1342
560 /* somebody will hit me for both perl_run and PL_restartop */ 1343 /* somebody or something will hit me for both perl_run and PL_restartop */
1344 PL_restartop = PL_op;
561 perl_run (PL_curinterp); 1345 perl_run (PL_curinterp);
1346 /*
1347 * Unfortunately, there is no way to get at the return values of the
1348 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1349 * runtime errors here, as this is just a random interpreter, not a thread.
1350 */
562 1351
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1352 /*
564 abort (); 1353 * If perl-run returns we assume exit() was being called or the coro
1354 * fell off the end, which seems to be the only valid (non-bug)
1355 * reason for perl_run to return. We try to exit by jumping to the
1356 * bootstrap-time "top" top_env, as we cannot restore the "main"
1357 * coroutine as Coro has no such concept.
1358 * This actually isn't valid with the pthread backend, but OSes requiring
1359 * that backend are too broken to do it in a standards-compliant way.
1360 */
1361 PL_top_env = main_top_env;
1362 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1363 }
565} 1364}
566 1365
567static coro_cctx * 1366static coro_cctx *
568cctx_new () 1367cctx_new ()
569{ 1368{
570 coro_cctx *cctx; 1369 coro_cctx *cctx;
571 1370
572 ++cctx_count; 1371 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx); 1372 New (0, cctx, 1, coro_cctx);
575 1373
1374 cctx->gen = cctx_gen;
1375 cctx->flags = 0;
1376 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1377
1378 return cctx;
1379}
1380
1381/* create a new cctx only suitable as source */
1382static coro_cctx *
1383cctx_new_empty ()
1384{
1385 coro_cctx *cctx = cctx_new ();
1386
1387 cctx->sptr = 0;
1388 coro_create (&cctx->cctx, 0, 0, 0, 0);
1389
1390 return cctx;
1391}
1392
1393/* create a new cctx suitable as destination/running a perl interpreter */
1394static coro_cctx *
1395cctx_new_run ()
1396{
1397 coro_cctx *cctx = cctx_new ();
1398 void *stack_start;
1399 size_t stack_size;
1400
576#if HAVE_MMAP 1401#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1402 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1403 /* mmap supposedly does allocate-on-write for us */
580 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1404 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1405
582 if (cctx->sptr == (void *)-1) 1406 if (cctx->sptr != (void *)-1)
583 {
584 perror ("FATAL: unable to mmap stack for coroutine");
585 _exit (EXIT_FAILURE);
586 } 1407 {
587 1408 #if CORO_STACKGUARD
588# if STACKGUARD
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1409 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590# endif 1410 #endif
591 1411 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
592#else 1412 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
593 1413 cctx->flags |= CC_MAPPED;
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr)
598 { 1414 }
599 perror ("FATAL: unable to malloc stack for coroutine"); 1415 else
600 _exit (EXIT_FAILURE);
601 }
602
603#endif 1416#endif
1417 {
1418 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1419 New (0, cctx->sptr, cctx_stacksize, long);
604 1420
1421 if (!cctx->sptr)
1422 {
1423 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1424 _exit (EXIT_FAILURE);
1425 }
1426
1427 stack_start = cctx->sptr;
1428 stack_size = cctx->ssize;
1429 }
1430
605#if USE_VALGRIND 1431 #if CORO_USE_VALGRIND
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1432 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
607 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608 cctx->ssize + (char *)cctx->sptr
609 );
610#endif 1433 #endif
611 1434
612 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1435 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
613 1436
614 return cctx; 1437 return cctx;
615} 1438}
616 1439
617static void 1440static void
618cctx_free (coro_cctx *cctx) 1441cctx_destroy (coro_cctx *cctx)
619{ 1442{
620 if (!cctx) 1443 if (!cctx)
621 return; 1444 return;
622 1445
1446 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1447
623 --cctx_count; 1448 --cctx_count;
1449 coro_destroy (&cctx->cctx);
624 1450
625#if USE_VALGRIND 1451 /* coro_transfer creates new, empty cctx's */
1452 if (cctx->sptr)
1453 {
1454 #if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1455 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1456 #endif
1457
1458#if HAVE_MMAP
1459 if (cctx->flags & CC_MAPPED)
1460 munmap (cctx->sptr, cctx->ssize);
1461 else
627#endif 1462#endif
628
629#if HAVE_MMAP
630 munmap (cctx->sptr, cctx->ssize);
631#else
632 Safefree (cctx->sptr); 1463 Safefree (cctx->sptr);
633#endif 1464 }
634 1465
635 Safefree (cctx); 1466 Safefree (cctx);
636} 1467}
637 1468
1469/* wether this cctx should be destructed */
1470#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1471
638static coro_cctx * 1472static coro_cctx *
639cctx_get () 1473cctx_get (pTHX)
640{ 1474{
641 coro_cctx *cctx; 1475 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1476 {
1477 coro_cctx *cctx = cctx_first;
1478 cctx_first = cctx->next;
645 --cctx_idle; 1479 --cctx_idle;
646 cctx = cctx_first; 1480
647 cctx_first = cctx->next; 1481 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1482 return cctx;
649 else 1483
650 { 1484 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1485 }
654 1486
655 return cctx; 1487 return cctx_new_run ();
656} 1488}
657 1489
658static void 1490static void
659cctx_put (coro_cctx *cctx) 1491cctx_put (coro_cctx *cctx)
660{ 1492{
1493 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1494
1495 /* free another cctx if overlimit */
1496 if (expect_false (cctx_idle >= cctx_max_idle))
1497 {
1498 coro_cctx *first = cctx_first;
1499 cctx_first = first->next;
1500 --cctx_idle;
1501
1502 cctx_destroy (first);
1503 }
1504
661 ++cctx_idle; 1505 ++cctx_idle;
662 cctx->next = cctx_first; 1506 cctx->next = cctx_first;
663 cctx_first = cctx; 1507 cctx_first = cctx;
664} 1508}
665 1509
666/* never call directly, always through the coro_state_transfer global variable */ 1510/** coroutine switching *****************************************************/
667static void NOINLINE 1511
1512static void
1513transfer_check (pTHX_ struct coro *prev, struct coro *next)
1514{
1515 /* TODO: throwing up here is considered harmful */
1516
1517 if (expect_true (prev != next))
1518 {
1519 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1520 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1521
1522 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1523 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1524
1525#if !PERL_VERSION_ATLEAST (5,10,0)
1526 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1527 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1528#endif
1529 }
1530}
1531
1532/* always use the TRANSFER macro */
1533static void NOINLINE /* noinline so we have a fixed stackframe */
668transfer (struct coro *prev, struct coro *next, int flags) 1534transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1535{
670 dSTACKLEVEL; 1536 dSTACKLEVEL;
671 1537
672 /* sometimes transfer is only called to set idle_sp */ 1538 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1539 if (expect_false (!prev))
1540 {
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1541 cctx_current->idle_sp = STACKLEVEL;
675 else if (prev != next) 1542 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
676 { 1543 }
1544 else if (expect_true (prev != next))
1545 {
677 coro_cctx *prev__cctx; 1546 coro_cctx *cctx_prev;
678 1547
679 if (!prev->cctx) 1548 if (expect_false (prev->flags & CF_NEW))
680 { 1549 {
681 /* create a new empty context */ 1550 /* create a new empty/source context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1551 prev->flags &= ~CF_NEW;
683 prev->cctx->inuse = 1;
684 prev->flags |= CF_RUNNING; 1552 prev->flags |= CF_RUNNING;
685 } 1553 }
686
687 if (!prev->flags & CF_RUNNING)
688 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690 if (next->flags & CF_RUNNING)
691 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692 1554
693 prev->flags &= ~CF_RUNNING; 1555 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1556 next->flags |= CF_RUNNING;
695 1557
696 LOCK; 1558 /* first get rid of the old state */
1559 save_perl (aTHX_ prev);
697 1560
698 if (next->mainstack) 1561 if (expect_false (next->flags & CF_NEW))
699 { 1562 {
700 /* coroutine already started */ 1563 /* need to start coroutine */
701 SAVE (prev, flags); 1564 next->flags &= ~CF_NEW;
702 LOAD (next); 1565 /* setup coroutine call */
1566 init_perl (aTHX_ next);
703 } 1567 }
704 else 1568 else
1569 load_perl (aTHX_ next);
1570
1571 /* possibly untie and reuse the cctx */
1572 if (expect_true (
1573 cctx_current->idle_sp == STACKLEVEL
1574 && !(cctx_current->flags & CC_TRACE)
1575 && !force_cctx
1576 ))
705 { 1577 {
706 /* need to start coroutine */ 1578 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
707 /* first get rid of the old state */ 1579 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
708 SAVE (prev, -1); 1580
709 /* setup coroutine call */ 1581 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
710 setup_coro (next); 1582 /* without this the next cctx_get might destroy the running cctx while still in use */
711 /* need a new stack */ 1583 if (expect_false (CCTX_EXPIRED (cctx_current)))
712 assert (!next->stack); 1584 if (expect_true (!next->cctx))
1585 next->cctx = cctx_get (aTHX);
1586
1587 cctx_put (cctx_current);
713 } 1588 }
1589 else
1590 prev->cctx = cctx_current;
714 1591
715 prev__cctx = prev->cctx; 1592 ++next->usecount;
716 1593
717 /* possibly "free" the cctx */ 1594 cctx_prev = cctx_current;
718 if (prev__cctx->idle_sp == STACKLEVEL) 1595 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1596
1597 next->cctx = 0;
1598
1599 if (expect_false (cctx_prev != cctx_current))
719 { 1600 {
720 assert (PL_top_env == prev__cctx->top_env); 1601 cctx_prev->top_env = PL_top_env;
721 1602 PL_top_env = cctx_current->top_env;
722 cctx_put (prev__cctx); 1603 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
723 prev->cctx = 0;
724 } 1604 }
725 else if (prev__cctx->idle_sp) //D
726 fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
727 1605
728 if (!next->cctx) 1606 transfer_tail (aTHX);
729 next->cctx = cctx_get ();
730
731 if (prev__cctx != next->cctx)
732 {
733 assert ( prev__cctx->inuse);
734 assert (!next->cctx->inuse);
735
736 prev__cctx->inuse = 0;
737 next->cctx->inuse = 1;
738
739 prev__cctx->top_env = PL_top_env;
740 PL_top_env = next->cctx->top_env;
741 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 } 1607 }
748} 1608}
749 1609
750struct transfer_args 1610#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
751{
752 struct coro *prev, *next;
753 int flags;
754};
755
756#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1611#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
757 1612
1613/** high level stuff ********************************************************/
1614
758static void 1615static int
759coro_state_destroy (struct coro *coro) 1616coro_state_destroy (pTHX_ struct coro *coro)
760{ 1617{
761 if (coro->refcnt--) 1618 if (coro->flags & CF_DESTROYED)
762 return; 1619 return 0;
763 1620
1621 if (coro->on_destroy && !PL_dirty)
1622 coro->on_destroy (aTHX_ coro);
1623
1624 coro->flags |= CF_DESTROYED;
1625
764 if (coro->flags & CF_RUNNING) 1626 if (coro->flags & CF_READY)
765 croak ("FATAL: tried to destroy currently running coroutine");
766
767 if (coro->mainstack && coro->mainstack != main_mainstack)
768 {
769 struct coro temp;
770
771 SAVE ((&temp), TRANSFER_SAVE_ALL);
772 LOAD (coro);
773
774 coro_destroy_stacks ();
775
776 LOAD ((&temp)); /* this will get rid of defsv etc.. */
777
778 coro->mainstack = 0;
779 } 1627 {
1628 /* reduce nready, as destroying a ready coro effectively unreadies it */
1629 /* alternative: look through all ready queues and remove the coro */
1630 --coro_nready;
1631 }
1632 else
1633 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
780 1634
1635 if (coro->mainstack
1636 && coro->mainstack != main_mainstack
1637 && coro->slot
1638 && !PL_dirty)
1639 destroy_perl (aTHX_ coro);
1640
1641 if (coro->next) coro->next->prev = coro->prev;
1642 if (coro->prev) coro->prev->next = coro->next;
1643 if (coro == coro_first) coro_first = coro->next;
1644
781 cctx_free (coro->cctx); 1645 cctx_destroy (coro->cctx);
1646 SvREFCNT_dec (coro->startcv);
782 SvREFCNT_dec (coro->args); 1647 SvREFCNT_dec (coro->args);
783 Safefree (coro); 1648 SvREFCNT_dec (coro->swap_sv);
1649 SvREFCNT_dec (CORO_THROW);
1650
1651 return 1;
784} 1652}
785 1653
786static int 1654static int
787coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1655coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788{ 1656{
789 struct coro *coro = (struct coro *)mg->mg_ptr; 1657 struct coro *coro = (struct coro *)mg->mg_ptr;
790 mg->mg_ptr = 0; 1658 mg->mg_ptr = 0;
791 1659
1660 coro->hv = 0;
1661
1662 if (--coro->refcnt < 0)
1663 {
792 coro_state_destroy (coro); 1664 coro_state_destroy (aTHX_ coro);
1665 Safefree (coro);
1666 }
793 1667
794 return 0; 1668 return 0;
795} 1669}
796 1670
797static int 1671static int
… …
804 return 0; 1678 return 0;
805} 1679}
806 1680
807static MGVTBL coro_state_vtbl = { 1681static MGVTBL coro_state_vtbl = {
808 0, 0, 0, 0, 1682 0, 0, 0, 0,
809 coro_state_clear, 1683 coro_state_free,
810 0, 1684 0,
811#ifdef MGf_DUP 1685#ifdef MGf_DUP
812 coro_state_dup, 1686 coro_state_dup,
813#else 1687#else
814# define MGf_DUP 0 1688# define MGf_DUP 0
815#endif 1689#endif
816}; 1690};
817 1691
818static struct coro *
819SvSTATE (SV *coro)
820{
821 HV *stash;
822 MAGIC *mg;
823
824 if (SvROK (coro))
825 coro = SvRV (coro);
826
827 stash = SvSTASH (coro);
828 if (stash != coro_stash && stash != coro_state_stash)
829 {
830 /* very slow, but rare, check */
831 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
832 croak ("Coro::State object required");
833 }
834
835 mg = SvMAGIC (coro);
836 assert (mg->mg_type == PERL_MAGIC_ext);
837 return (struct coro *)mg->mg_ptr;
838}
839
840static void 1692static void
841prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1693prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
842{ 1694{
843 ta->prev = SvSTATE (prev); 1695 ta->prev = SvSTATE (prev_sv);
844 ta->next = SvSTATE (next); 1696 ta->next = SvSTATE (next_sv);
845 ta->flags = flags; 1697 TRANSFER_CHECK (*ta);
846} 1698}
847 1699
848static void 1700static void
849api_transfer (SV *prev, SV *next, int flags) 1701api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1702{
1703 struct coro_transfer_args ta;
1704
1705 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1706 TRANSFER (ta, 1);
1707}
1708
1709/** Coro ********************************************************************/
1710
1711INLINE void
1712coro_enq (pTHX_ struct coro *coro)
1713{
1714 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1715
1716 SvREFCNT_inc_NN (coro->hv);
1717
1718 coro->next_ready = 0;
1719 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1720 ready [1] = coro;
1721}
1722
1723INLINE struct coro *
1724coro_deq (pTHX)
1725{
1726 int prio;
1727
1728 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1729 {
1730 struct coro **ready = coro_ready [prio];
1731
1732 if (ready [0])
1733 {
1734 struct coro *coro = ready [0];
1735 ready [0] = coro->next_ready;
1736 return coro;
1737 }
1738 }
1739
1740 return 0;
1741}
1742
1743static void
1744invoke_sv_ready_hook_helper (void)
850{ 1745{
851 dTHX; 1746 dTHX;
852 struct transfer_args ta; 1747 dSP;
853 1748
854 prepare_transfer (&ta, prev, next, flags); 1749 ENTER;
855 TRANSFER (ta); 1750 SAVETMPS;
856}
857 1751
858/** Coro ********************************************************************/ 1752 PUSHMARK (SP);
1753 PUTBACK;
1754 call_sv (coro_readyhook, G_VOID | G_DISCARD);
859 1755
860#define PRIO_MAX 3 1756 FREETMPS;
861#define PRIO_HIGH 1 1757 LEAVE;
862#define PRIO_NORMAL 0
863#define PRIO_LOW -1
864#define PRIO_IDLE -3
865#define PRIO_MIN -4
866
867/* for Coro.pm */
868static GV *coro_current, *coro_idle;
869static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870static int coro_nready;
871
872static void
873coro_enq (SV *coro_sv)
874{
875 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0)
890 {
891 coro_nready--;
892 return av_shift (coro_ready [prio]);
893 }
894
895 return 0;
896} 1758}
897 1759
898static int 1760static int
899api_ready (SV *coro_sv) 1761api_ready (pTHX_ SV *coro_sv)
900{ 1762{
901 struct coro *coro;
902
903 if (SvROK (coro_sv))
904 coro_sv = SvRV (coro_sv);
905
906 coro = SvSTATE (coro_sv); 1763 struct coro *coro = SvSTATE (coro_sv);
907 1764
908 if (coro->flags & CF_READY) 1765 if (coro->flags & CF_READY)
909 return 0; 1766 return 0;
910 1767
1768 coro->flags |= CF_READY;
1769
1770 coro_enq (aTHX_ coro);
1771
1772 if (!coro_nready++)
1773 if (coroapi.readyhook)
1774 coroapi.readyhook ();
1775
1776 return 1;
1777}
1778
1779static int
1780api_is_ready (pTHX_ SV *coro_sv)
1781{
1782 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1783}
1784
1785/* expects to own a reference to next->hv */
1786INLINE void
1787prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1788{
1789 SV *prev_sv = SvRV (coro_current);
1790
1791 ta->prev = SvSTATE_hv (prev_sv);
1792 ta->next = next;
1793
1794 TRANSFER_CHECK (*ta);
1795
1796 SvRV_set (coro_current, (SV *)next->hv);
1797
1798 free_coro_mortal (aTHX);
1799 coro_mortal = prev_sv;
1800}
1801
1802static void
1803prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1804{
1805 for (;;)
1806 {
1807 struct coro *next = coro_deq (aTHX);
1808
1809 if (expect_true (next))
1810 {
1811 /* cannot transfer to destroyed coros, skip and look for next */
1812 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1813 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1814 else
1815 {
1816 next->flags &= ~CF_READY;
1817 --coro_nready;
1818
1819 prepare_schedule_to (aTHX_ ta, next);
1820 break;
1821 }
1822 }
1823 else
1824 {
1825 /* nothing to schedule: call the idle handler */
1826 if (SvROK (sv_idle)
1827 && SvOBJECT (SvRV (sv_idle)))
1828 {
1829 if (SvRV (sv_idle) == SvRV (coro_current))
1830 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1831
1832 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1833 api_ready (aTHX_ SvRV (sv_idle));
1834 --coro_nready;
1835 }
1836 else
1837 {
1838 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1839 dSP;
1840
1841 ENTER;
1842 SAVETMPS;
1843
1844 PUSHMARK (SP);
1845 PUTBACK;
1846 call_sv (sv_idle, G_VOID | G_DISCARD);
1847
1848 FREETMPS;
1849 LEAVE;
1850 }
1851 }
1852 }
1853}
1854
1855INLINE void
1856prepare_cede (pTHX_ struct coro_transfer_args *ta)
1857{
1858 api_ready (aTHX_ coro_current);
1859 prepare_schedule (aTHX_ ta);
1860}
1861
1862INLINE void
1863prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1864{
1865 SV *prev = SvRV (coro_current);
1866
1867 if (coro_nready)
1868 {
1869 prepare_schedule (aTHX_ ta);
1870 api_ready (aTHX_ prev);
1871 }
1872 else
1873 prepare_nop (aTHX_ ta);
1874}
1875
1876static void
1877api_schedule (pTHX)
1878{
1879 struct coro_transfer_args ta;
1880
1881 prepare_schedule (aTHX_ &ta);
1882 TRANSFER (ta, 1);
1883}
1884
1885static void
1886api_schedule_to (pTHX_ SV *coro_sv)
1887{
1888 struct coro_transfer_args ta;
1889 struct coro *next = SvSTATE (coro_sv);
1890
1891 SvREFCNT_inc_NN (coro_sv);
1892 prepare_schedule_to (aTHX_ &ta, next);
1893}
1894
1895static int
1896api_cede (pTHX)
1897{
1898 struct coro_transfer_args ta;
1899
1900 prepare_cede (aTHX_ &ta);
1901
1902 if (expect_true (ta.prev != ta.next))
1903 {
1904 TRANSFER (ta, 1);
1905 return 1;
1906 }
1907 else
1908 return 0;
1909}
1910
1911static int
1912api_cede_notself (pTHX)
1913{
1914 if (coro_nready)
1915 {
1916 struct coro_transfer_args ta;
1917
1918 prepare_cede_notself (aTHX_ &ta);
1919 TRANSFER (ta, 1);
1920 return 1;
1921 }
1922 else
1923 return 0;
1924}
1925
1926static void
1927api_trace (pTHX_ SV *coro_sv, int flags)
1928{
1929 struct coro *coro = SvSTATE (coro_sv);
1930
911 if (coro->flags & CF_RUNNING) 1931 if (coro->flags & CF_RUNNING)
912 croak ("Coro::ready called on currently running coroutine"); 1932 croak ("cannot enable tracing on a running coroutine, caught");
913 1933
914 coro->flags |= CF_READY; 1934 if (flags & CC_TRACE)
1935 {
1936 if (!coro->cctx)
1937 coro->cctx = cctx_new_run ();
1938 else if (!(coro->cctx->flags & CC_TRACE))
1939 croak ("cannot enable tracing on coroutine with custom stack, caught");
915 1940
916 LOCK; 1941 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
917 coro_enq (SvREFCNT_inc (coro_sv)); 1942 }
918 UNLOCK; 1943 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1944 {
1945 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
919 1946
920 return 1; 1947 if (coro->flags & CF_RUNNING)
1948 PL_runops = RUNOPS_DEFAULT;
1949 else
1950 coro->slot->runops = RUNOPS_DEFAULT;
1951 }
921} 1952}
1953
1954static void
1955coro_call_on_destroy (pTHX_ struct coro *coro)
1956{
1957 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1958 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1959
1960 if (on_destroyp)
1961 {
1962 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1963
1964 while (AvFILLp (on_destroy) >= 0)
1965 {
1966 dSP; /* don't disturb outer sp */
1967 SV *cb = av_pop (on_destroy);
1968
1969 PUSHMARK (SP);
1970
1971 if (statusp)
1972 {
1973 int i;
1974 AV *status = (AV *)SvRV (*statusp);
1975 EXTEND (SP, AvFILLp (status) + 1);
1976
1977 for (i = 0; i <= AvFILLp (status); ++i)
1978 PUSHs (AvARRAY (status)[i]);
1979 }
1980
1981 PUTBACK;
1982 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1983 }
1984 }
1985}
1986
1987static void
1988slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1989{
1990 int i;
1991 HV *hv = (HV *)SvRV (coro_current);
1992 AV *av = newAV ();
1993
1994 /* items are actually not so common, so optimise for this case */
1995 if (items)
1996 {
1997 av_extend (av, items - 1);
1998
1999 for (i = 0; i < items; ++i)
2000 av_push (av, SvREFCNT_inc_NN (arg [i]));
2001 }
2002
2003 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2004
2005 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2006 api_ready (aTHX_ sv_manager);
2007
2008 frame->prepare = prepare_schedule;
2009 frame->check = slf_check_repeat;
2010
2011 /* as a minor optimisation, we could unwind all stacks here */
2012 /* but that puts extra pressure on pp_slf, and is not worth much */
2013 /*coro_unwind_stacks (aTHX);*/
2014}
2015
2016/*****************************************************************************/
2017/* async pool handler */
922 2018
923static int 2019static int
924api_is_ready (SV *coro_sv) 2020slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
925{ 2021{
926 return !!SvSTATE (coro_sv)->flags & CF_READY; 2022 HV *hv = (HV *)SvRV (coro_current);
927} 2023 struct coro *coro = (struct coro *)frame->data;
928 2024
929static void 2025 if (!coro->invoke_cb)
930prepare_schedule (struct transfer_args *ta) 2026 return 1; /* loop till we have invoke */
931{ 2027 else
932 SV *current, *prev, *next;
933
934 current = GvSV (coro_current);
935
936 for (;;)
937 { 2028 {
938 LOCK; 2029 hv_store (hv, "desc", sizeof ("desc") - 1,
939 next = coro_deq (PRIO_MIN); 2030 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
940 UNLOCK;
941 2031
942 if (next) 2032 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
943 break;
944 2033
945 { 2034 {
946 dSP; 2035 dSP;
947 2036 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
948 ENTER;
949 SAVETMPS;
950
951 PUSHMARK (SP);
952 PUTBACK; 2037 PUTBACK;
953 call_sv (GvSV (coro_idle), G_DISCARD);
954
955 FREETMPS;
956 LEAVE;
957 } 2038 }
2039
2040 SvREFCNT_dec (GvAV (PL_defgv));
2041 GvAV (PL_defgv) = coro->invoke_av;
2042 coro->invoke_av = 0;
2043
2044 return 0;
2045 }
2046}
2047
2048static void
2049slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2050{
2051 HV *hv = (HV *)SvRV (coro_current);
2052 struct coro *coro = SvSTATE_hv ((SV *)hv);
2053
2054 if (expect_true (coro->saved_deffh))
958 } 2055 {
2056 /* subsequent iteration */
2057 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2058 coro->saved_deffh = 0;
959 2059
960 prev = SvRV (current); 2060 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
961 SvRV (current) = next; 2061 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2062 {
2063 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2064 coro->invoke_av = newAV ();
962 2065
963 /* free this only after the transfer */ 2066 frame->prepare = prepare_nop;
964 LOCK; 2067 }
965 free_coro_mortal (); 2068 else
966 UNLOCK; 2069 {
967 coro_mortal = prev; 2070 av_clear (GvAV (PL_defgv));
2071 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
968 2072
969 ta->prev = SvSTATE (prev); 2073 coro->prio = 0;
970 ta->next = SvSTATE (next);
971 ta->flags = TRANSFER_SAVE_ALL;
972 2074
973 ta->next->flags &= ~CF_READY; 2075 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
974} 2076 api_trace (aTHX_ coro_current, 0);
975 2077
2078 frame->prepare = prepare_schedule;
2079 av_push (av_async_pool, SvREFCNT_inc (hv));
2080 }
2081 }
2082 else
2083 {
2084 /* first iteration, simply fall through */
2085 frame->prepare = prepare_nop;
2086 }
2087
2088 frame->check = slf_check_pool_handler;
2089 frame->data = (void *)coro;
2090}
2091
2092/*****************************************************************************/
2093/* rouse callback */
2094
2095#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2096
2097static void
2098coro_rouse_callback (pTHX_ CV *cv)
2099{
2100 dXSARGS;
2101 SV *data = (SV *)S_GENSUB_ARG;
2102
2103 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2104 {
2105 /* first call, set args */
2106 SV *coro = SvRV (data);
2107 AV *av = newAV ();
2108
2109 SvRV_set (data, (SV *)av);
2110
2111 /* better take a full copy of the arguments */
2112 while (items--)
2113 av_store (av, items, newSVsv (ST (items)));
2114
2115 api_ready (aTHX_ coro);
2116 SvREFCNT_dec (coro);
2117 }
2118
2119 XSRETURN_EMPTY;
2120}
2121
976static void 2122static int
2123slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2124{
2125 SV *data = (SV *)frame->data;
2126
2127 if (CORO_THROW)
2128 return 0;
2129
2130 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2131 return 1;
2132
2133 /* now push all results on the stack */
2134 {
2135 dSP;
2136 AV *av = (AV *)SvRV (data);
2137 int i;
2138
2139 EXTEND (SP, AvFILLp (av) + 1);
2140 for (i = 0; i <= AvFILLp (av); ++i)
2141 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2142
2143 /* we have stolen the elements, so set length to zero and free */
2144 AvFILLp (av) = -1;
2145 av_undef (av);
2146
2147 PUTBACK;
2148 }
2149
2150 return 0;
2151}
2152
2153static void
2154slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2155{
2156 SV *cb;
2157
2158 if (items)
2159 cb = arg [0];
2160 else
2161 {
2162 struct coro *coro = SvSTATE_current;
2163
2164 if (!coro->rouse_cb)
2165 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2166
2167 cb = sv_2mortal (coro->rouse_cb);
2168 coro->rouse_cb = 0;
2169 }
2170
2171 if (!SvROK (cb)
2172 || SvTYPE (SvRV (cb)) != SVt_PVCV
2173 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2174 croak ("Coro::rouse_wait called with illegal callback argument,");
2175
2176 {
2177 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2178 SV *data = (SV *)S_GENSUB_ARG;
2179
2180 frame->data = (void *)data;
2181 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2182 frame->check = slf_check_rouse_wait;
2183 }
2184}
2185
2186static SV *
2187coro_new_rouse_cb (pTHX)
2188{
2189 HV *hv = (HV *)SvRV (coro_current);
2190 struct coro *coro = SvSTATE_hv (hv);
2191 SV *data = newRV_inc ((SV *)hv);
2192 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2193
2194 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2195 SvREFCNT_dec (data); /* magicext increases the refcount */
2196
2197 SvREFCNT_dec (coro->rouse_cb);
2198 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2199
2200 return cb;
2201}
2202
2203/*****************************************************************************/
2204/* schedule-like-function opcode (SLF) */
2205
2206static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2207static const CV *slf_cv;
2208static SV **slf_argv;
2209static int slf_argc, slf_arga; /* count, allocated */
2210static I32 slf_ax; /* top of stack, for restore */
2211
2212/* this restores the stack in the case we patched the entersub, to */
2213/* recreate the stack frame as perl will on following calls */
2214/* since entersub cleared the stack */
2215static OP *
2216pp_restore (pTHX)
2217{
2218 int i;
2219 SV **SP = PL_stack_base + slf_ax;
2220
2221 PUSHMARK (SP);
2222
2223 EXTEND (SP, slf_argc + 1);
2224
2225 for (i = 0; i < slf_argc; ++i)
2226 PUSHs (sv_2mortal (slf_argv [i]));
2227
2228 PUSHs ((SV *)CvGV (slf_cv));
2229
2230 RETURNOP (slf_restore.op_first);
2231}
2232
2233static void
2234slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2235{
2236 SV **arg = (SV **)slf_frame.data;
2237
2238 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2239}
2240
2241static void
2242slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2243{
2244 if (items != 2)
2245 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2246
2247 frame->prepare = slf_prepare_transfer;
2248 frame->check = slf_check_nop;
2249 frame->data = (void *)arg; /* let's hope it will stay valid */
2250}
2251
2252static void
2253slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2254{
2255 frame->prepare = prepare_schedule;
2256 frame->check = slf_check_nop;
2257}
2258
2259static void
977prepare_cede (struct transfer_args *ta) 2260slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
978{ 2261{
2262 struct coro *next = (struct coro *)slf_frame.data;
2263
2264 SvREFCNT_inc_NN (next->hv);
2265 prepare_schedule_to (aTHX_ ta, next);
2266}
2267
2268static void
2269slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2270{
2271 if (!items)
2272 croak ("Coro::schedule_to expects a coroutine argument, caught");
2273
2274 frame->data = (void *)SvSTATE (arg [0]);
2275 frame->prepare = slf_prepare_schedule_to;
2276 frame->check = slf_check_nop;
2277}
2278
2279static void
2280slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2281{
979 api_ready (GvSV (coro_current)); 2282 api_ready (aTHX_ SvRV (coro_current));
980 2283
981 prepare_schedule (ta); 2284 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
982} 2285}
983 2286
984static void 2287static void
985api_schedule (void) 2288slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
986{ 2289{
987 dTHX; 2290 frame->prepare = prepare_cede;
2291 frame->check = slf_check_nop;
2292}
2293
2294static void
2295slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2296{
2297 frame->prepare = prepare_cede_notself;
2298 frame->check = slf_check_nop;
2299}
2300
2301/*
2302 * these not obviously related functions are all rolled into one
2303 * function to increase chances that they all will call transfer with the same
2304 * stack offset
2305 * SLF stands for "schedule-like-function".
2306 */
2307static OP *
2308pp_slf (pTHX)
2309{
2310 I32 checkmark; /* mark SP to see how many elements check has pushed */
2311
2312 /* set up the slf frame, unless it has already been set-up */
2313 /* the latter happens when a new coro has been started */
2314 /* or when a new cctx was attached to an existing coroutine */
2315 if (expect_true (!slf_frame.prepare))
2316 {
2317 /* first iteration */
2318 dSP;
2319 SV **arg = PL_stack_base + TOPMARK + 1;
2320 int items = SP - arg; /* args without function object */
2321 SV *gv = *sp;
2322
2323 /* do a quick consistency check on the "function" object, and if it isn't */
2324 /* for us, divert to the real entersub */
2325 if (SvTYPE (gv) != SVt_PVGV
2326 || !GvCV (gv)
2327 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2328 return PL_ppaddr[OP_ENTERSUB](aTHX);
2329
2330 if (!(PL_op->op_flags & OPf_STACKED))
2331 {
2332 /* ampersand-form of call, use @_ instead of stack */
2333 AV *av = GvAV (PL_defgv);
2334 arg = AvARRAY (av);
2335 items = AvFILLp (av) + 1;
2336 }
2337
2338 /* now call the init function, which needs to set up slf_frame */
2339 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2340 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2341
2342 /* pop args */
2343 SP = PL_stack_base + POPMARK;
2344
2345 PUTBACK;
2346 }
2347
2348 /* now that we have a slf_frame, interpret it! */
2349 /* we use a callback system not to make the code needlessly */
2350 /* complicated, but so we can run multiple perl coros from one cctx */
2351
2352 do
2353 {
988 struct transfer_args ta; 2354 struct coro_transfer_args ta;
989 2355
990 prepare_schedule (&ta); 2356 slf_frame.prepare (aTHX_ &ta);
991 TRANSFER (ta); 2357 TRANSFER (ta, 0);
992}
993 2358
2359 checkmark = PL_stack_sp - PL_stack_base;
2360 }
2361 while (slf_frame.check (aTHX_ &slf_frame));
2362
2363 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2364
2365 /* exception handling */
2366 if (expect_false (CORO_THROW))
2367 {
2368 SV *exception = sv_2mortal (CORO_THROW);
2369
2370 CORO_THROW = 0;
2371 sv_setsv (ERRSV, exception);
2372 croak (0);
2373 }
2374
2375 /* return value handling - mostly like entersub */
2376 /* make sure we put something on the stack in scalar context */
2377 if (GIMME_V == G_SCALAR)
2378 {
2379 dSP;
2380 SV **bot = PL_stack_base + checkmark;
2381
2382 if (sp == bot) /* too few, push undef */
2383 bot [1] = &PL_sv_undef;
2384 else if (sp != bot + 1) /* too many, take last one */
2385 bot [1] = *sp;
2386
2387 SP = bot + 1;
2388
2389 PUTBACK;
2390 }
2391
2392 return NORMAL;
2393}
2394
2395static void
2396api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2397{
2398 int i;
2399 SV **arg = PL_stack_base + ax;
2400 int items = PL_stack_sp - arg + 1;
2401
2402 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2403
2404 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2405 && PL_op->op_ppaddr != pp_slf)
2406 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2407
2408 CvFLAGS (cv) |= CVf_SLF;
2409 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2410 slf_cv = cv;
2411
2412 /* we patch the op, and then re-run the whole call */
2413 /* we have to put the same argument on the stack for this to work */
2414 /* and this will be done by pp_restore */
2415 slf_restore.op_next = (OP *)&slf_restore;
2416 slf_restore.op_type = OP_CUSTOM;
2417 slf_restore.op_ppaddr = pp_restore;
2418 slf_restore.op_first = PL_op;
2419
2420 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2421
2422 if (PL_op->op_flags & OPf_STACKED)
2423 {
2424 if (items > slf_arga)
2425 {
2426 slf_arga = items;
2427 Safefree (slf_argv);
2428 New (0, slf_argv, slf_arga, SV *);
2429 }
2430
2431 slf_argc = items;
2432
2433 for (i = 0; i < items; ++i)
2434 slf_argv [i] = SvREFCNT_inc (arg [i]);
2435 }
2436 else
2437 slf_argc = 0;
2438
2439 PL_op->op_ppaddr = pp_slf;
2440 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2441
2442 PL_op = (OP *)&slf_restore;
2443}
2444
2445/*****************************************************************************/
2446/* dynamic wind */
2447
2448static void
2449on_enterleave_call (pTHX_ SV *cb)
2450{
2451 dSP;
2452
2453 PUSHSTACK;
2454
2455 PUSHMARK (SP);
2456 PUTBACK;
2457 call_sv (cb, G_VOID | G_DISCARD);
2458 SPAGAIN;
2459
2460 POPSTACK;
2461}
2462
2463static SV *
2464coro_avp_pop_and_free (pTHX_ AV **avp)
2465{
2466 AV *av = *avp;
2467 SV *res = av_pop (av);
2468
2469 if (AvFILLp (av) < 0)
2470 {
2471 *avp = 0;
2472 SvREFCNT_dec (av);
2473 }
2474
2475 return res;
2476}
2477
2478static void
2479coro_pop_on_enter (pTHX_ void *coro)
2480{
2481 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2482 SvREFCNT_dec (cb);
2483}
2484
2485static void
2486coro_pop_on_leave (pTHX_ void *coro)
2487{
2488 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2489 on_enterleave_call (aTHX_ sv_2mortal (cb));
2490}
2491
2492/*****************************************************************************/
2493/* PerlIO::cede */
2494
2495typedef struct
2496{
2497 PerlIOBuf base;
2498 NV next, every;
2499} PerlIOCede;
2500
2501static IV
2502PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2503{
2504 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2505
2506 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2507 self->next = nvtime () + self->every;
2508
2509 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2510}
2511
2512static SV *
2513PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2514{
2515 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2516
2517 return newSVnv (self->every);
2518}
2519
2520static IV
2521PerlIOCede_flush (pTHX_ PerlIO *f)
2522{
2523 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2524 double now = nvtime ();
2525
2526 if (now >= self->next)
2527 {
2528 api_cede (aTHX);
2529 self->next = now + self->every;
2530 }
2531
2532 return PerlIOBuf_flush (aTHX_ f);
2533}
2534
2535static PerlIO_funcs PerlIO_cede =
2536{
2537 sizeof(PerlIO_funcs),
2538 "cede",
2539 sizeof(PerlIOCede),
2540 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2541 PerlIOCede_pushed,
2542 PerlIOBuf_popped,
2543 PerlIOBuf_open,
2544 PerlIOBase_binmode,
2545 PerlIOCede_getarg,
2546 PerlIOBase_fileno,
2547 PerlIOBuf_dup,
2548 PerlIOBuf_read,
2549 PerlIOBuf_unread,
2550 PerlIOBuf_write,
2551 PerlIOBuf_seek,
2552 PerlIOBuf_tell,
2553 PerlIOBuf_close,
2554 PerlIOCede_flush,
2555 PerlIOBuf_fill,
2556 PerlIOBase_eof,
2557 PerlIOBase_error,
2558 PerlIOBase_clearerr,
2559 PerlIOBase_setlinebuf,
2560 PerlIOBuf_get_base,
2561 PerlIOBuf_bufsiz,
2562 PerlIOBuf_get_ptr,
2563 PerlIOBuf_get_cnt,
2564 PerlIOBuf_set_ptrcnt,
2565};
2566
2567/*****************************************************************************/
2568/* Coro::Semaphore & Coro::Signal */
2569
2570static SV *
2571coro_waitarray_new (pTHX_ int count)
2572{
2573 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2574 AV *av = newAV ();
2575 SV **ary;
2576
2577 /* unfortunately, building manually saves memory */
2578 Newx (ary, 2, SV *);
2579 AvALLOC (av) = ary;
2580#if PERL_VERSION_ATLEAST (5,10,0)
2581 AvARRAY (av) = ary;
2582#else
2583 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2584 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2585 SvPVX ((SV *)av) = (char *)ary;
2586#endif
2587 AvMAX (av) = 1;
2588 AvFILLp (av) = 0;
2589 ary [0] = newSViv (count);
2590
2591 return newRV_noinc ((SV *)av);
2592}
2593
2594/* semaphore */
2595
2596static void
2597coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2598{
2599 SV *count_sv = AvARRAY (av)[0];
2600 IV count = SvIVX (count_sv);
2601
2602 count += adjust;
2603 SvIVX (count_sv) = count;
2604
2605 /* now wake up as many waiters as are expected to lock */
2606 while (count > 0 && AvFILLp (av) > 0)
2607 {
2608 SV *cb;
2609
2610 /* swap first two elements so we can shift a waiter */
2611 AvARRAY (av)[0] = AvARRAY (av)[1];
2612 AvARRAY (av)[1] = count_sv;
2613 cb = av_shift (av);
2614
2615 if (SvOBJECT (cb))
2616 {
2617 api_ready (aTHX_ cb);
2618 --count;
2619 }
2620 else if (SvTYPE (cb) == SVt_PVCV)
2621 {
2622 dSP;
2623 PUSHMARK (SP);
2624 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2625 PUTBACK;
2626 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2627 }
2628
2629 SvREFCNT_dec (cb);
2630 }
2631}
2632
2633static void
2634coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2635{
2636 /* call $sem->adjust (0) to possibly wake up some other waiters */
2637 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2638}
2639
994static void 2640static int
995api_cede (void) 2641slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
996{ 2642{
997 dTHX; 2643 AV *av = (AV *)frame->data;
998 struct transfer_args ta; 2644 SV *count_sv = AvARRAY (av)[0];
999 2645
1000 prepare_cede (&ta); 2646 /* if we are about to throw, don't actually acquire the lock, just throw */
1001 TRANSFER (ta); 2647 if (CORO_THROW)
1002} 2648 return 0;
2649 else if (SvIVX (count_sv) > 0)
2650 {
2651 SvSTATE_current->on_destroy = 0;
1003 2652
2653 if (acquire)
2654 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2655 else
2656 coro_semaphore_adjust (aTHX_ av, 0);
2657
2658 return 0;
2659 }
2660 else
2661 {
2662 int i;
2663 /* if we were woken up but can't down, we look through the whole */
2664 /* waiters list and only add us if we aren't in there already */
2665 /* this avoids some degenerate memory usage cases */
2666
2667 for (i = 1; i <= AvFILLp (av); ++i)
2668 if (AvARRAY (av)[i] == SvRV (coro_current))
2669 return 1;
2670
2671 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2672 return 1;
2673 }
2674}
2675
2676static int
2677slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2678{
2679 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2680}
2681
2682static int
2683slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2684{
2685 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2686}
2687
2688static void
2689slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2690{
2691 AV *av = (AV *)SvRV (arg [0]);
2692
2693 if (SvIVX (AvARRAY (av)[0]) > 0)
2694 {
2695 frame->data = (void *)av;
2696 frame->prepare = prepare_nop;
2697 }
2698 else
2699 {
2700 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2701
2702 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2703 frame->prepare = prepare_schedule;
2704
2705 /* to avoid race conditions when a woken-up coro gets terminated */
2706 /* we arrange for a temporary on_destroy that calls adjust (0) */
2707 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2708 }
2709}
2710
2711static void
2712slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2713{
2714 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2715 frame->check = slf_check_semaphore_down;
2716}
2717
2718static void
2719slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2720{
2721 if (items >= 2)
2722 {
2723 /* callback form */
2724 AV *av = (AV *)SvRV (arg [0]);
2725 SV *cb_cv = s_get_cv_croak (arg [1]);
2726
2727 av_push (av, SvREFCNT_inc_NN (cb_cv));
2728
2729 if (SvIVX (AvARRAY (av)[0]) > 0)
2730 coro_semaphore_adjust (aTHX_ av, 0);
2731
2732 frame->prepare = prepare_nop;
2733 frame->check = slf_check_nop;
2734 }
2735 else
2736 {
2737 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2738 frame->check = slf_check_semaphore_wait;
2739 }
2740}
2741
2742/* signal */
2743
2744static void
2745coro_signal_wake (pTHX_ AV *av, int count)
2746{
2747 SvIVX (AvARRAY (av)[0]) = 0;
2748
2749 /* now signal count waiters */
2750 while (count > 0 && AvFILLp (av) > 0)
2751 {
2752 SV *cb;
2753
2754 /* swap first two elements so we can shift a waiter */
2755 cb = AvARRAY (av)[0];
2756 AvARRAY (av)[0] = AvARRAY (av)[1];
2757 AvARRAY (av)[1] = cb;
2758
2759 cb = av_shift (av);
2760
2761 if (SvTYPE (cb) == SVt_PVCV)
2762 {
2763 dSP;
2764 PUSHMARK (SP);
2765 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2766 PUTBACK;
2767 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2768 }
2769 else
2770 {
2771 api_ready (aTHX_ cb);
2772 sv_setiv (cb, 0); /* signal waiter */
2773 }
2774
2775 SvREFCNT_dec (cb);
2776
2777 --count;
2778 }
2779}
2780
2781static int
2782slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2783{
2784 /* if we are about to throw, also stop waiting */
2785 return SvROK ((SV *)frame->data) && !CORO_THROW;
2786}
2787
2788static void
2789slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2790{
2791 AV *av = (AV *)SvRV (arg [0]);
2792
2793 if (items >= 2)
2794 {
2795 SV *cb_cv = s_get_cv_croak (arg [1]);
2796 av_push (av, SvREFCNT_inc_NN (cb_cv));
2797
2798 if (SvIVX (AvARRAY (av)[0]))
2799 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2800
2801 frame->prepare = prepare_nop;
2802 frame->check = slf_check_nop;
2803 }
2804 else if (SvIVX (AvARRAY (av)[0]))
2805 {
2806 SvIVX (AvARRAY (av)[0]) = 0;
2807 frame->prepare = prepare_nop;
2808 frame->check = slf_check_nop;
2809 }
2810 else
2811 {
2812 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2813
2814 av_push (av, waiter);
2815
2816 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2817 frame->prepare = prepare_schedule;
2818 frame->check = slf_check_signal_wait;
2819 }
2820}
2821
2822/*****************************************************************************/
2823/* Coro::AIO */
2824
2825#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2826
2827/* helper storage struct */
2828struct io_state
2829{
2830 int errorno;
2831 I32 laststype; /* U16 in 5.10.0 */
2832 int laststatval;
2833 Stat_t statcache;
2834};
2835
2836static void
2837coro_aio_callback (pTHX_ CV *cv)
2838{
2839 dXSARGS;
2840 AV *state = (AV *)S_GENSUB_ARG;
2841 SV *coro = av_pop (state);
2842 SV *data_sv = newSV (sizeof (struct io_state));
2843
2844 av_extend (state, items - 1);
2845
2846 sv_upgrade (data_sv, SVt_PV);
2847 SvCUR_set (data_sv, sizeof (struct io_state));
2848 SvPOK_only (data_sv);
2849
2850 {
2851 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2852
2853 data->errorno = errno;
2854 data->laststype = PL_laststype;
2855 data->laststatval = PL_laststatval;
2856 data->statcache = PL_statcache;
2857 }
2858
2859 /* now build the result vector out of all the parameters and the data_sv */
2860 {
2861 int i;
2862
2863 for (i = 0; i < items; ++i)
2864 av_push (state, SvREFCNT_inc_NN (ST (i)));
2865 }
2866
2867 av_push (state, data_sv);
2868
2869 api_ready (aTHX_ coro);
2870 SvREFCNT_dec (coro);
2871 SvREFCNT_dec ((AV *)state);
2872}
2873
2874static int
2875slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2876{
2877 AV *state = (AV *)frame->data;
2878
2879 /* if we are about to throw, return early */
2880 /* this does not cancel the aio request, but at least */
2881 /* it quickly returns */
2882 if (CORO_THROW)
2883 return 0;
2884
2885 /* one element that is an RV? repeat! */
2886 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2887 return 1;
2888
2889 /* restore status */
2890 {
2891 SV *data_sv = av_pop (state);
2892 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2893
2894 errno = data->errorno;
2895 PL_laststype = data->laststype;
2896 PL_laststatval = data->laststatval;
2897 PL_statcache = data->statcache;
2898
2899 SvREFCNT_dec (data_sv);
2900 }
2901
2902 /* push result values */
2903 {
2904 dSP;
2905 int i;
2906
2907 EXTEND (SP, AvFILLp (state) + 1);
2908 for (i = 0; i <= AvFILLp (state); ++i)
2909 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2910
2911 PUTBACK;
2912 }
2913
2914 return 0;
2915}
2916
2917static void
2918slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2919{
2920 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2921 SV *coro_hv = SvRV (coro_current);
2922 struct coro *coro = SvSTATE_hv (coro_hv);
2923
2924 /* put our coroutine id on the state arg */
2925 av_push (state, SvREFCNT_inc_NN (coro_hv));
2926
2927 /* first see whether we have a non-zero priority and set it as AIO prio */
2928 if (coro->prio)
2929 {
2930 dSP;
2931
2932 static SV *prio_cv;
2933 static SV *prio_sv;
2934
2935 if (expect_false (!prio_cv))
2936 {
2937 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2938 prio_sv = newSViv (0);
2939 }
2940
2941 PUSHMARK (SP);
2942 sv_setiv (prio_sv, coro->prio);
2943 XPUSHs (prio_sv);
2944
2945 PUTBACK;
2946 call_sv (prio_cv, G_VOID | G_DISCARD);
2947 }
2948
2949 /* now call the original request */
2950 {
2951 dSP;
2952 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2953 int i;
2954
2955 PUSHMARK (SP);
2956
2957 /* first push all args to the stack */
2958 EXTEND (SP, items + 1);
2959
2960 for (i = 0; i < items; ++i)
2961 PUSHs (arg [i]);
2962
2963 /* now push the callback closure */
2964 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2965
2966 /* now call the AIO function - we assume our request is uncancelable */
2967 PUTBACK;
2968 call_sv ((SV *)req, G_VOID | G_DISCARD);
2969 }
2970
2971 /* now that the request is going, we loop till we have a result */
2972 frame->data = (void *)state;
2973 frame->prepare = prepare_schedule;
2974 frame->check = slf_check_aio_req;
2975}
2976
2977static void
2978coro_aio_req_xs (pTHX_ CV *cv)
2979{
2980 dXSARGS;
2981
2982 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2983
2984 XSRETURN_EMPTY;
2985}
2986
2987/*****************************************************************************/
2988
2989#if CORO_CLONE
2990# include "clone.c"
2991#endif
2992
2993/*****************************************************************************/
2994
2995static SV *
2996coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2997{
2998 SV *coro_sv;
2999 struct coro *coro;
3000 MAGIC *mg;
3001 HV *hv;
3002 SV *cb;
3003 int i;
3004
3005 if (argc > 0)
3006 {
3007 cb = s_get_cv_croak (argv [0]);
3008
3009 if (!is_coro)
3010 {
3011 if (CvISXSUB (cb))
3012 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3013
3014 if (!CvROOT (cb))
3015 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3016 }
3017 }
3018
3019 Newz (0, coro, 1, struct coro);
3020 coro->args = newAV ();
3021 coro->flags = CF_NEW;
3022
3023 if (coro_first) coro_first->prev = coro;
3024 coro->next = coro_first;
3025 coro_first = coro;
3026
3027 coro->hv = hv = newHV ();
3028 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3029 mg->mg_flags |= MGf_DUP;
3030 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3031
3032 if (argc > 0)
3033 {
3034 av_extend (coro->args, argc + is_coro - 1);
3035
3036 if (is_coro)
3037 {
3038 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3039 cb = (SV *)cv_coro_run;
3040 }
3041
3042 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3043
3044 for (i = 1; i < argc; i++)
3045 av_push (coro->args, newSVsv (argv [i]));
3046 }
3047
3048 return coro_sv;
3049}
3050
1004MODULE = Coro::State PACKAGE = Coro::State 3051MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1005 3052
1006PROTOTYPES: DISABLE 3053PROTOTYPES: DISABLE
1007 3054
1008BOOT: 3055BOOT:
1009{ 3056{
1010#ifdef USE_ITHREADS 3057#ifdef USE_ITHREADS
1011 MUTEX_INIT (&coro_mutex); 3058# if CORO_PTHREAD
3059 coro_thx = PERL_GET_CONTEXT;
3060# endif
1012#endif 3061#endif
1013 BOOT_PAGESIZE; 3062 BOOT_PAGESIZE;
1014 3063
3064 cctx_current = cctx_new_empty ();
3065
3066 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3067 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3068
3069 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3070 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3071 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3072
3073 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3074 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3075 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3076
1015 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3077 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1016 3078
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3079 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1018 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3080 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1019 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3081 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3082 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1020 3083
1021 main_mainstack = PL_mainstack; 3084 main_mainstack = PL_mainstack;
3085 main_top_env = PL_top_env;
1022 3086
3087 while (main_top_env->je_prev)
3088 main_top_env = main_top_env->je_prev;
3089
3090 {
3091 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3092
3093 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3094 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3095
3096 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3097 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3098 }
3099
1023 coroapi.ver = CORO_API_VERSION; 3100 coroapi.ver = CORO_API_VERSION;
3101 coroapi.rev = CORO_API_REVISION;
3102
1024 coroapi.transfer = api_transfer; 3103 coroapi.transfer = api_transfer;
1025 3104
3105 coroapi.sv_state = SvSTATE_;
3106 coroapi.execute_slf = api_execute_slf;
3107 coroapi.prepare_nop = prepare_nop;
3108 coroapi.prepare_schedule = prepare_schedule;
3109 coroapi.prepare_cede = prepare_cede;
3110 coroapi.prepare_cede_notself = prepare_cede_notself;
3111
3112 {
3113 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3114
3115 if (!svp) croak ("Time::HiRes is required");
3116 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3117
3118 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3119
3120 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3121 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3122 }
3123
1026 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3124 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1027} 3125}
1028 3126
1029SV * 3127SV *
1030new (char *klass, ...) 3128new (SV *klass, ...)
3129 ALIAS:
3130 Coro::new = 1
1031 CODE: 3131 CODE:
1032{ 3132 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1033 struct coro *coro; 3133 OUTPUT:
1034 HV *hv;
1035 int i;
1036
1037 Newz (0, coro, 1, struct coro);
1038 coro->args = newAV ();
1039
1040 hv = newHV ();
1041 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1042 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1043
1044 for (i = 1; i < items; i++)
1045 av_push (coro->args, newSVsv (ST (i)));
1046}
1047 OUTPUT:
1048 RETVAL 3134 RETVAL
1049 3135
1050void 3136void
1051_set_stacklevel (...) 3137transfer (...)
1052 ALIAS: 3138 PROTOTYPE: $$
1053 Coro::State::transfer = 1 3139 CODE:
1054 Coro::schedule = 2 3140 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1055 Coro::cede = 3
1056 Coro::Cont::yield = 4
1057 CODE:
1058{
1059 struct transfer_args ta;
1060 3141
1061 switch (ix) 3142bool
1062 { 3143_destroy (SV *coro_sv)
1063 case 0: 3144 CODE:
1064 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3145 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1065 ta.next = 0; 3146 OUTPUT:
1066 ta.flags = TRANSFER_SET_STACKLEVEL; 3147 RETVAL
1067 break;
1068
1069 case 1:
1070 if (items != 3)
1071 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1072
1073 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1074 break;
1075
1076 case 2:
1077 prepare_schedule (&ta);
1078 break;
1079
1080 case 3:
1081 prepare_cede (&ta);
1082 break;
1083
1084 case 4:
1085 {
1086 SV *yieldstack;
1087 SV *sv;
1088 AV *defav = GvAV (PL_defgv);
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1104 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1105 ta.flags = 0;
1106 SvREFCNT_dec (sv);
1107 }
1108 break;
1109
1110 }
1111
1112 TRANSFER (ta);
1113}
1114 3148
1115void 3149void
1116_clone_state_from (SV *dst, SV *src)
1117 CODE:
1118{
1119 struct coro *coro_src = SvSTATE (src);
1120
1121 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1122
1123 ++coro_src->refcnt;
1124 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1125}
1126
1127void
1128_exit (code) 3150_exit (int code)
1129 int code
1130 PROTOTYPE: $ 3151 PROTOTYPE: $
1131 CODE: 3152 CODE:
1132 _exit (code); 3153 _exit (code);
1133 3154
3155SV *
3156clone (Coro::State coro)
3157 CODE:
3158{
3159#if CORO_CLONE
3160 struct coro *ncoro = coro_clone (aTHX_ coro);
3161 MAGIC *mg;
3162 /* TODO: too much duplication */
3163 ncoro->hv = newHV ();
3164 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3165 mg->mg_flags |= MGf_DUP;
3166 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3167#else
3168 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3169#endif
3170}
3171 OUTPUT:
3172 RETVAL
3173
3174int
3175cctx_stacksize (int new_stacksize = 0)
3176 PROTOTYPE: ;$
3177 CODE:
3178 RETVAL = cctx_stacksize;
3179 if (new_stacksize)
3180 {
3181 cctx_stacksize = new_stacksize;
3182 ++cctx_gen;
3183 }
3184 OUTPUT:
3185 RETVAL
3186
3187int
3188cctx_max_idle (int max_idle = 0)
3189 PROTOTYPE: ;$
3190 CODE:
3191 RETVAL = cctx_max_idle;
3192 if (max_idle > 1)
3193 cctx_max_idle = max_idle;
3194 OUTPUT:
3195 RETVAL
3196
1134int 3197int
1135cctx_count () 3198cctx_count ()
3199 PROTOTYPE:
1136 CODE: 3200 CODE:
1137 RETVAL = cctx_count; 3201 RETVAL = cctx_count;
1138 OUTPUT: 3202 OUTPUT:
1139 RETVAL 3203 RETVAL
1140 3204
1141int 3205int
1142cctx_idle () 3206cctx_idle ()
3207 PROTOTYPE:
1143 CODE: 3208 CODE:
1144 RETVAL = cctx_idle; 3209 RETVAL = cctx_idle;
1145 OUTPUT: 3210 OUTPUT:
1146 RETVAL 3211 RETVAL
1147 3212
3213void
3214list ()
3215 PROTOTYPE:
3216 PPCODE:
3217{
3218 struct coro *coro;
3219 for (coro = coro_first; coro; coro = coro->next)
3220 if (coro->hv)
3221 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3222}
3223
3224void
3225call (Coro::State coro, SV *coderef)
3226 ALIAS:
3227 eval = 1
3228 CODE:
3229{
3230 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3231 {
3232 struct coro *current = SvSTATE_current;
3233
3234 if (current != coro)
3235 {
3236 PUTBACK;
3237 save_perl (aTHX_ current);
3238 load_perl (aTHX_ coro);
3239 SPAGAIN;
3240 }
3241
3242 PUSHSTACK;
3243
3244 PUSHMARK (SP);
3245 PUTBACK;
3246
3247 if (ix)
3248 eval_sv (coderef, 0);
3249 else
3250 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3251
3252 POPSTACK;
3253 SPAGAIN;
3254
3255 if (current != coro)
3256 {
3257 PUTBACK;
3258 save_perl (aTHX_ coro);
3259 load_perl (aTHX_ current);
3260 SPAGAIN;
3261 }
3262 }
3263}
3264
3265SV *
3266is_ready (Coro::State coro)
3267 PROTOTYPE: $
3268 ALIAS:
3269 is_ready = CF_READY
3270 is_running = CF_RUNNING
3271 is_new = CF_NEW
3272 is_destroyed = CF_DESTROYED
3273 is_suspended = CF_SUSPENDED
3274 CODE:
3275 RETVAL = boolSV (coro->flags & ix);
3276 OUTPUT:
3277 RETVAL
3278
3279void
3280throw (Coro::State self, SV *exception = &PL_sv_undef)
3281 PROTOTYPE: $;$
3282 CODE:
3283{
3284 struct coro *current = SvSTATE_current;
3285 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3286 SvREFCNT_dec (*exceptionp);
3287 SvGETMAGIC (exception);
3288 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3289}
3290
3291void
3292api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3293 PROTOTYPE: $;$
3294 C_ARGS: aTHX_ coro, flags
3295
3296SV *
3297has_cctx (Coro::State coro)
3298 PROTOTYPE: $
3299 CODE:
3300 /* maybe manage the running flag differently */
3301 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3302 OUTPUT:
3303 RETVAL
3304
3305int
3306is_traced (Coro::State coro)
3307 PROTOTYPE: $
3308 CODE:
3309 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3310 OUTPUT:
3311 RETVAL
3312
3313UV
3314rss (Coro::State coro)
3315 PROTOTYPE: $
3316 ALIAS:
3317 usecount = 1
3318 CODE:
3319 switch (ix)
3320 {
3321 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3322 case 1: RETVAL = coro->usecount; break;
3323 }
3324 OUTPUT:
3325 RETVAL
3326
3327void
3328force_cctx ()
3329 PROTOTYPE:
3330 CODE:
3331 cctx_current->idle_sp = 0;
3332
3333void
3334swap_defsv (Coro::State self)
3335 PROTOTYPE: $
3336 ALIAS:
3337 swap_defav = 1
3338 CODE:
3339 if (!self->slot)
3340 croak ("cannot swap state with coroutine that has no saved state,");
3341 else
3342 {
3343 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3344 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3345
3346 SV *tmp = *src; *src = *dst; *dst = tmp;
3347 }
3348
3349void
3350cancel (Coro::State self)
3351 CODE:
3352 coro_state_destroy (aTHX_ self);
3353 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3354
3355
3356SV *
3357enable_times (int enabled = enable_times)
3358 CODE:
3359{
3360 RETVAL = boolSV (enable_times);
3361
3362 if (enabled != enable_times)
3363 {
3364 enable_times = enabled;
3365
3366 coro_times_update ();
3367 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3368 }
3369}
3370 OUTPUT:
3371 RETVAL
3372
3373void
3374times (Coro::State self)
3375 PPCODE:
3376{
3377 struct coro *current = SvSTATE (coro_current);
3378
3379 if (expect_false (current == self))
3380 {
3381 coro_times_update ();
3382 coro_times_add (SvSTATE (coro_current));
3383 }
3384
3385 EXTEND (SP, 2);
3386 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3387 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3388
3389 if (expect_false (current == self))
3390 coro_times_sub (SvSTATE (coro_current));
3391}
3392
3393void
3394swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3395 CODE:
3396{
3397 struct coro *current = SvSTATE_current;
3398
3399 if (current == coro)
3400 SWAP_SVS (current);
3401
3402 if (!coro->swap_sv)
3403 coro->swap_sv = newAV ();
3404
3405 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3406 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3407
3408 if (current == coro)
3409 SWAP_SVS (current);
3410}
3411
3412
1148MODULE = Coro::State PACKAGE = Coro 3413MODULE = Coro::State PACKAGE = Coro
1149 3414
1150BOOT: 3415BOOT:
1151{ 3416{
1152 int i; 3417 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3418 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3419 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3420 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3421 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3422 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3423 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3424 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3425 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1153 3426
3427 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3428 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3429 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3430 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3431
1154 coro_stash = gv_stashpv ("Coro", TRUE); 3432 coro_stash = gv_stashpv ("Coro", TRUE);
1155 3433
1156 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3434 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1157 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3435 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1158 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3436 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1159 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3437 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1160 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3438 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1161 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3439 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1162
1163 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1164 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1165
1166 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1167 coro_ready[i] = newAV ();
1168 3440
1169 { 3441 {
1170 SV *sv = perl_get_sv("Coro::API", 1); 3442 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1171 3443
1172 coroapi.schedule = api_schedule; 3444 coroapi.schedule = api_schedule;
3445 coroapi.schedule_to = api_schedule_to;
1173 coroapi.cede = api_cede; 3446 coroapi.cede = api_cede;
3447 coroapi.cede_notself = api_cede_notself;
1174 coroapi.ready = api_ready; 3448 coroapi.ready = api_ready;
1175 coroapi.is_ready = api_is_ready; 3449 coroapi.is_ready = api_is_ready;
1176 coroapi.nready = &coro_nready; 3450 coroapi.nready = coro_nready;
1177 coroapi.current = coro_current; 3451 coroapi.current = coro_current;
1178 3452
1179 GCoroAPI = &coroapi; 3453 /*GCoroAPI = &coroapi;*/
1180 sv_setiv (sv, (IV)&coroapi); 3454 sv_setiv (sv, (IV)&coroapi);
1181 SvREADONLY_on (sv); 3455 SvREADONLY_on (sv);
1182 } 3456 }
1183} 3457}
1184 3458
3459SV *
3460async (...)
3461 PROTOTYPE: &@
3462 CODE:
3463 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3464 api_ready (aTHX_ RETVAL);
3465 OUTPUT:
3466 RETVAL
3467
3468void
3469terminate (...)
3470 CODE:
3471 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3472
3473void
3474schedule (...)
3475 CODE:
3476 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3477
3478void
3479schedule_to (...)
3480 CODE:
3481 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3482
3483void
3484cede_to (...)
3485 CODE:
3486 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3487
3488void
3489cede (...)
3490 CODE:
3491 CORO_EXECUTE_SLF_XS (slf_init_cede);
3492
3493void
3494cede_notself (...)
3495 CODE:
3496 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3497
3498void
3499_set_current (SV *current)
3500 PROTOTYPE: $
3501 CODE:
3502 SvREFCNT_dec (SvRV (coro_current));
3503 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3504
3505void
3506_set_readyhook (SV *hook)
3507 PROTOTYPE: $
3508 CODE:
3509 SvREFCNT_dec (coro_readyhook);
3510 SvGETMAGIC (hook);
3511 if (SvOK (hook))
3512 {
3513 coro_readyhook = newSVsv (hook);
3514 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3515 }
3516 else
3517 {
3518 coro_readyhook = 0;
3519 CORO_READYHOOK = 0;
3520 }
3521
1185int 3522int
1186prio (Coro::State coro, int newprio = 0) 3523prio (Coro::State coro, int newprio = 0)
3524 PROTOTYPE: $;$
1187 ALIAS: 3525 ALIAS:
1188 nice = 1 3526 nice = 1
1189 CODE: 3527 CODE:
1190{ 3528{
1191 RETVAL = coro->prio; 3529 RETVAL = coro->prio;
1192 3530
1193 if (items > 1) 3531 if (items > 1)
1194 { 3532 {
1195 if (ix) 3533 if (ix)
1196 newprio += coro->prio; 3534 newprio = coro->prio - newprio;
1197 3535
1198 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3536 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1199 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3537 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1200 3538
1201 coro->prio = newprio; 3539 coro->prio = newprio;
1202 } 3540 }
1203} 3541}
3542 OUTPUT:
3543 RETVAL
1204 3544
1205SV * 3545SV *
1206ready (SV *self) 3546ready (SV *self)
1207 PROTOTYPE: $ 3547 PROTOTYPE: $
1208 CODE: 3548 CODE:
1209 RETVAL = boolSV (api_ready (self)); 3549 RETVAL = boolSV (api_ready (aTHX_ self));
1210 OUTPUT:
1211 RETVAL
1212
1213SV *
1214is_ready (SV *self)
1215 PROTOTYPE: $
1216 CODE:
1217 RETVAL = boolSV (api_is_ready (self));
1218 OUTPUT: 3550 OUTPUT:
1219 RETVAL 3551 RETVAL
1220 3552
1221int 3553int
1222nready (...) 3554nready (...)
… …
1224 CODE: 3556 CODE:
1225 RETVAL = coro_nready; 3557 RETVAL = coro_nready;
1226 OUTPUT: 3558 OUTPUT:
1227 RETVAL 3559 RETVAL
1228 3560
1229MODULE = Coro::State PACKAGE = Coro::AIO 3561void
3562suspend (Coro::State self)
3563 PROTOTYPE: $
3564 CODE:
3565 self->flags |= CF_SUSPENDED;
3566
3567void
3568resume (Coro::State self)
3569 PROTOTYPE: $
3570 CODE:
3571 self->flags &= ~CF_SUSPENDED;
3572
3573void
3574_pool_handler (...)
3575 CODE:
3576 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3577
3578void
3579async_pool (SV *cv, ...)
3580 PROTOTYPE: &@
3581 PPCODE:
3582{
3583 HV *hv = (HV *)av_pop (av_async_pool);
3584 AV *av = newAV ();
3585 SV *cb = ST (0);
3586 int i;
3587
3588 av_extend (av, items - 2);
3589 for (i = 1; i < items; ++i)
3590 av_push (av, SvREFCNT_inc_NN (ST (i)));
3591
3592 if ((SV *)hv == &PL_sv_undef)
3593 {
3594 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3595 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3596 SvREFCNT_dec (sv);
3597 }
3598
3599 {
3600 struct coro *coro = SvSTATE_hv (hv);
3601
3602 assert (!coro->invoke_cb);
3603 assert (!coro->invoke_av);
3604 coro->invoke_cb = SvREFCNT_inc (cb);
3605 coro->invoke_av = av;
3606 }
3607
3608 api_ready (aTHX_ (SV *)hv);
3609
3610 if (GIMME_V != G_VOID)
3611 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3612 else
3613 SvREFCNT_dec (hv);
3614}
1230 3615
1231SV * 3616SV *
1232_get_state () 3617rouse_cb ()
3618 PROTOTYPE:
1233 CODE: 3619 CODE:
1234{ 3620 RETVAL = coro_new_rouse_cb (aTHX);
1235 struct {
1236 int errorno;
1237 int laststype;
1238 int laststatval;
1239 Stat_t statcache;
1240 } data;
1241
1242 data.errorno = errno;
1243 data.laststype = PL_laststype;
1244 data.laststatval = PL_laststatval;
1245 data.statcache = PL_statcache;
1246
1247 RETVAL = newSVpvn ((char *)&data, sizeof data);
1248}
1249 OUTPUT: 3621 OUTPUT:
1250 RETVAL 3622 RETVAL
1251 3623
1252void 3624void
1253_set_state (char *data_) 3625rouse_wait (...)
3626 PROTOTYPE: ;$
3627 PPCODE:
3628 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3629
3630void
3631on_enter (SV *block)
3632 ALIAS:
3633 on_leave = 1
1254 PROTOTYPE: $ 3634 PROTOTYPE: &
1255 CODE: 3635 CODE:
1256{ 3636{
1257 struct { 3637 struct coro *coro = SvSTATE_current;
3638 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3639
3640 block = s_get_cv_croak (block);
3641
3642 if (!*avp)
3643 *avp = newAV ();
3644
3645 av_push (*avp, SvREFCNT_inc (block));
3646
3647 if (!ix)
3648 on_enterleave_call (aTHX_ block);
3649
3650 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3651 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3652 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3653}
3654
3655
3656MODULE = Coro::State PACKAGE = PerlIO::cede
3657
3658BOOT:
3659 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3660
3661
3662MODULE = Coro::State PACKAGE = Coro::Semaphore
3663
3664SV *
3665new (SV *klass, SV *count = 0)
3666 CODE:
3667{
3668 int semcnt = 1;
3669
3670 if (count)
3671 {
3672 SvGETMAGIC (count);
3673
3674 if (SvOK (count))
3675 semcnt = SvIV (count);
3676 }
3677
3678 RETVAL = sv_bless (
3679 coro_waitarray_new (aTHX_ semcnt),
3680 GvSTASH (CvGV (cv))
3681 );
3682}
3683 OUTPUT:
3684 RETVAL
3685
3686# helper for Coro::Channel and others
3687SV *
3688_alloc (int count)
3689 CODE:
3690 RETVAL = coro_waitarray_new (aTHX_ count);
3691 OUTPUT:
3692 RETVAL
3693
3694SV *
3695count (SV *self)
3696 CODE:
3697 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3698 OUTPUT:
3699 RETVAL
3700
3701void
3702up (SV *self, int adjust = 1)
3703 ALIAS:
3704 adjust = 1
3705 CODE:
3706 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3707
3708void
3709down (...)
3710 CODE:
3711 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3712
3713void
3714wait (...)
3715 CODE:
3716 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3717
3718void
3719try (SV *self)
3720 PPCODE:
3721{
3722 AV *av = (AV *)SvRV (self);
3723 SV *count_sv = AvARRAY (av)[0];
3724 IV count = SvIVX (count_sv);
3725
3726 if (count > 0)
3727 {
3728 --count;
3729 SvIVX (count_sv) = count;
3730 XSRETURN_YES;
3731 }
3732 else
3733 XSRETURN_NO;
3734}
3735
3736void
3737waiters (SV *self)
3738 PPCODE:
3739{
3740 AV *av = (AV *)SvRV (self);
3741 int wcount = AvFILLp (av) + 1 - 1;
3742
3743 if (GIMME_V == G_SCALAR)
3744 XPUSHs (sv_2mortal (newSViv (wcount)));
3745 else
3746 {
1258 int errorno; 3747 int i;
1259 int laststype; 3748 EXTEND (SP, wcount);
1260 int laststatval; 3749 for (i = 1; i <= wcount; ++i)
1261 Stat_t statcache; 3750 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1262 } *data = (void *)data_; 3751 }
1263
1264 errno = data->errorno;
1265 PL_laststype = data->laststype;
1266 PL_laststatval = data->laststatval;
1267 PL_statcache = data->statcache;
1268} 3752}
3753
3754MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3755
3756void
3757_may_delete (SV *sem, int count, int extra_refs)
3758 PPCODE:
3759{
3760 AV *av = (AV *)SvRV (sem);
3761
3762 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3763 && AvFILLp (av) == 0 /* no waiters, just count */
3764 && SvIV (AvARRAY (av)[0]) == count)
3765 XSRETURN_YES;
3766
3767 XSRETURN_NO;
3768}
3769
3770MODULE = Coro::State PACKAGE = Coro::Signal
3771
3772SV *
3773new (SV *klass)
3774 CODE:
3775 RETVAL = sv_bless (
3776 coro_waitarray_new (aTHX_ 0),
3777 GvSTASH (CvGV (cv))
3778 );
3779 OUTPUT:
3780 RETVAL
3781
3782void
3783wait (...)
3784 CODE:
3785 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3786
3787void
3788broadcast (SV *self)
3789 CODE:
3790{
3791 AV *av = (AV *)SvRV (self);
3792 coro_signal_wake (aTHX_ av, AvFILLp (av));
3793}
3794
3795void
3796send (SV *self)
3797 CODE:
3798{
3799 AV *av = (AV *)SvRV (self);
3800
3801 if (AvFILLp (av))
3802 coro_signal_wake (aTHX_ av, 1);
3803 else
3804 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3805}
3806
3807IV
3808awaited (SV *self)
3809 CODE:
3810 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3811 OUTPUT:
3812 RETVAL
3813
3814
3815MODULE = Coro::State PACKAGE = Coro::AnyEvent
3816
3817BOOT:
3818 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3819
3820void
3821_schedule (...)
3822 CODE:
3823{
3824 static int incede;
3825
3826 api_cede_notself (aTHX);
3827
3828 ++incede;
3829 while (coro_nready >= incede && api_cede (aTHX))
3830 ;
3831
3832 sv_setsv (sv_activity, &PL_sv_undef);
3833 if (coro_nready >= incede)
3834 {
3835 PUSHMARK (SP);
3836 PUTBACK;
3837 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3838 }
3839
3840 --incede;
3841}
3842
3843
3844MODULE = Coro::State PACKAGE = Coro::AIO
3845
3846void
3847_register (char *target, char *proto, SV *req)
3848 CODE:
3849{
3850 SV *req_cv = s_get_cv_croak (req);
3851 /* newXSproto doesn't return the CV on 5.8 */
3852 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3853 sv_setpv ((SV *)slf_cv, proto);
3854 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3855}
3856
3857MODULE = Coro::State PACKAGE = Coro::Select
3858
3859void
3860patch_pp_sselect ()
3861 CODE:
3862 if (!coro_old_pp_sselect)
3863 {
3864 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3865 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3866 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3867 }
3868
3869void
3870unpatch_pp_sselect ()
3871 CODE:
3872 if (coro_old_pp_sselect)
3873 {
3874 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3875 coro_old_pp_sselect = 0;
3876 }
3877
3878

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines