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Comparing Coro/Coro/State.xs (file contents):
Revision 1.148 by root, Fri Apr 13 12:56:55 2007 UTC vs.
Revision 1.363 by root, Tue Jul 14 00:55:10 2009 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "schmorp.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79 55
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 57# undef CORO_STACKGUARD
82#endif 58#endif
83 59
… …
88/* prefer perl internal functions over our own? */ 64/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 65#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 67#endif
92 68
93/* The next macro should declare a variable stacklevel that contains and approximation 69/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 70 * portable way as possible. */
95 * and should be unique. */ 71#if __GNUC__ >= 4
96#define dSTACKLEVEL int stacklevel 72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
97#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
98 78
99#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
100 80
101#if __GNUC__ >= 3 81#if __GNUC__ >= 3
102# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
104#else 85#else
105# define attribute(x) 86# define attribute(x)
106# define BARRIER 87# define expect(expr,value) (expr)
88# define INLINE static
107#endif 89#endif
108 90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
109#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
110 95
111#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
112 98
113#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 100# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif 103#endif
121 104
122/* helper storage struct for Coro::AIO */ 105#ifdef __linux
123struct io_state 106# include <time.h> /* for timespec */
124{ 107# include <syscall.h> /* for SYS_* */
125 int errorno; 108# ifdef SYS_clock_gettime
126 I32 laststype; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
127 int laststatval; 110# define CORO_CLOCK_MONOTONIC 1
128 Stat_t statcache; 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
129}; 112# endif
113#endif
130 114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 123static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 126static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
136static SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
129
130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147static CV *cv_coro_state_new;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
137 157
138static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
140 160
161enum {
162 CC_MAPPED = 0x01,
163 CC_NOREUSE = 0x02, /* throw this away after tracing */
164 CC_TRACE = 0x04,
165 CC_TRACE_SUB = 0x08, /* trace sub calls */
166 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168};
169
141/* this is a structure representing a c-level coroutine */ 170/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 171typedef struct coro_cctx
172{
143 struct coro_cctx *next; 173 struct coro_cctx *next;
144 174
145 /* the stack */ 175 /* the stack */
146 void *sptr; 176 void *sptr;
147 size_t ssize; 177 size_t ssize;
… …
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
152 JMPENV *top_env; 182 JMPENV *top_env;
153 coro_context cctx; 183 coro_context cctx;
154 184
185 U32 gen;
155#if CORO_USE_VALGRIND 186#if CORO_USE_VALGRIND
156 int valgrind_id; 187 int valgrind_id;
157#endif 188#endif
158 char inuse, mapped; 189 unsigned char flags;
159} coro_cctx; 190} coro_cctx;
191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
160 195
161enum { 196enum {
162 CF_RUNNING = 0x0001, /* coroutine is running */ 197 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 198 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 199 CF_NEW = 0x0004, /* has never been switched to */
165 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
201 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
166}; 202};
167 203
168/* this is a structure representing a perl-level coroutine */ 204/* the structure where most of the perl state is stored, overlaid on the cxstack */
169struct coro { 205typedef struct
170 /* the c coroutine allocated to this perl coroutine, if any */ 206{
171 coro_cctx *cctx; 207 SV *defsv;
172 208 AV *defav;
173 /* data associated with this coroutine (initial args) */ 209 SV *errsv;
174 AV *args; 210 SV *irsgv;
175 int refcnt; 211 HV *hinthv;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */
178
179 /* optionally saved, might be zero */
180 AV *defav; /* @_ */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name; 212#define VAR(name,type) type name;
188# include "state.h" 213# include "state.h"
189#undef VAR 214#undef VAR
215} perl_slots;
216
217#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
218
219/* this is a structure representing a perl-level coroutine */
220struct coro {
221 /* the C coroutine allocated to this perl coroutine, if any */
222 coro_cctx *cctx;
223
224 /* ready queue */
225 struct coro *next_ready;
226
227 /* state data */
228 struct CoroSLF slf_frame; /* saved slf frame */
229 AV *mainstack;
230 perl_slots *slot; /* basically the saved sp */
231
232 CV *startcv; /* the CV to execute */
233 AV *args; /* data associated with this coroutine (initial args) */
234 int refcnt; /* coroutines are refcounted, yes */
235 int flags; /* CF_ flags */
236 HV *hv; /* the perl hash associated with this coro, if any */
237 void (*on_destroy)(pTHX_ struct coro *coro);
238
239 /* statistics */
240 int usecount; /* number of transfers to this coro */
190 241
191 /* coro process data */ 242 /* coro process data */
192 int prio; 243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb;
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* times */
257 coro_ts t_cpu, t_real;
258
259 /* linked list */
260 struct coro *next, *prev;
193}; 261};
194 262
195typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
196typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
197 265
266/* the following variables are effectively part of the perl context */
267/* and get copied between struct coro and these variables */
268/* the mainr easonw e don't support windows process emulation */
269static struct CoroSLF slf_frame; /* the current slf frame */
270
198/** Coro ********************************************************************/ 271/** Coro ********************************************************************/
199 272
200#define PRIO_MAX 3 273#define CORO_PRIO_MAX 3
201#define PRIO_HIGH 1 274#define CORO_PRIO_HIGH 1
202#define PRIO_NORMAL 0 275#define CORO_PRIO_NORMAL 0
203#define PRIO_LOW -1 276#define CORO_PRIO_LOW -1
204#define PRIO_IDLE -3 277#define CORO_PRIO_IDLE -3
205#define PRIO_MIN -4 278#define CORO_PRIO_MIN -4
206 279
207/* for Coro.pm */ 280/* for Coro.pm */
208static SV *coro_current; 281static SV *coro_current;
209static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 282static SV *coro_readyhook;
210static int coro_nready; 283static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
284static CV *cv_coro_run, *cv_coro_terminate;
285static struct coro *coro_first;
286#define coro_nready coroapi.nready
211 287
212/** lowlevel stuff **********************************************************/ 288/** lowlevel stuff **********************************************************/
213 289
290static SV *
291coro_get_sv (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_sv (name, create);
296#endif
297 return get_sv (name, create);
298}
299
214static AV * 300static AV *
301coro_get_av (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_av (name, create);
306#endif
307 return get_av (name, create);
308}
309
310static HV *
311coro_get_hv (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_hv (name, create);
316#endif
317 return get_hv (name, create);
318}
319
320INLINE void
321coro_times_update ()
322{
323#ifdef coro_clock_gettime
324 struct timespec ts;
325
326 ts.tv_sec = ts.tv_nsec = 0;
327 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
328 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
329
330 ts.tv_sec = ts.tv_nsec = 0;
331 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
332 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
333#else
334 dTHX;
335 UV tv[2];
336
337 u2time (aTHX_ tv);
338 time_real [0] = tv [0];
339 time_real [1] = tv [1] * 1000;
340#endif
341}
342
343INLINE void
344coro_times_add (struct coro *c)
345{
346 c->t_real [1] += time_real [1];
347 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
348 c->t_real [0] += time_real [0];
349
350 c->t_cpu [1] += time_cpu [1];
351 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
352 c->t_cpu [0] += time_cpu [0];
353}
354
355INLINE void
356coro_times_sub (struct coro *c)
357{
358 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
359 c->t_real [1] -= time_real [1];
360 c->t_real [0] -= time_real [0];
361
362 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
363 c->t_cpu [1] -= time_cpu [1];
364 c->t_cpu [0] -= time_cpu [0];
365}
366
367/*****************************************************************************/
368/* magic glue */
369
370#define CORO_MAGIC_type_cv 26
371#define CORO_MAGIC_type_state PERL_MAGIC_ext
372
373#define CORO_MAGIC_NN(sv, type) \
374 (expect_true (SvMAGIC (sv)->mg_type == type) \
375 ? SvMAGIC (sv) \
376 : mg_find (sv, type))
377
378#define CORO_MAGIC(sv, type) \
379 (expect_true (SvMAGIC (sv)) \
380 ? CORO_MAGIC_NN (sv, type) \
381 : 0)
382
383#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
384#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
385
386INLINE struct coro *
387SvSTATE_ (pTHX_ SV *coro)
388{
389 HV *stash;
390 MAGIC *mg;
391
392 if (SvROK (coro))
393 coro = SvRV (coro);
394
395 if (expect_false (SvTYPE (coro) != SVt_PVHV))
396 croak ("Coro::State object required");
397
398 stash = SvSTASH (coro);
399 if (expect_false (stash != coro_stash && stash != coro_state_stash))
400 {
401 /* very slow, but rare, check */
402 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
403 croak ("Coro::State object required");
404 }
405
406 mg = CORO_MAGIC_state (coro);
407 return (struct coro *)mg->mg_ptr;
408}
409
410#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
411
412/* faster than SvSTATE, but expects a coroutine hv */
413#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
414#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
415
416/*****************************************************************************/
417/* padlist management and caching */
418
419static AV *
215coro_clone_padlist (pTHX_ CV *cv) 420coro_derive_padlist (pTHX_ CV *cv)
216{ 421{
217 AV *padlist = CvPADLIST (cv); 422 AV *padlist = CvPADLIST (cv);
218 AV *newpadlist, *newpad; 423 AV *newpadlist, *newpad;
219 424
220 newpadlist = newAV (); 425 newpadlist = newAV ();
221 AvREAL_off (newpadlist); 426 AvREAL_off (newpadlist);
222#if PERL_VERSION_ATLEAST (5,9,0) 427#if PERL_VERSION_ATLEAST (5,10,0)
223 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 428 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
224#else 429#else
225 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 430 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
226#endif 431#endif
227 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 432 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
228 --AvFILLp (padlist); 433 --AvFILLp (padlist);
229 434
230 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 435 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
231 av_store (newpadlist, 1, (SV *)newpad); 436 av_store (newpadlist, 1, (SV *)newpad);
232 437
233 return newpadlist; 438 return newpadlist;
234} 439}
235 440
236static void 441static void
237free_padlist (pTHX_ AV *padlist) 442free_padlist (pTHX_ AV *padlist)
238{ 443{
239 /* may be during global destruction */ 444 /* may be during global destruction */
240 if (SvREFCNT (padlist)) 445 if (!IN_DESTRUCT)
241 { 446 {
242 I32 i = AvFILLp (padlist); 447 I32 i = AvFILLp (padlist);
243 while (i >= 0) 448
449 while (i > 0) /* special-case index 0 */
244 { 450 {
245 SV **svp = av_fetch (padlist, i--, FALSE); 451 /* we try to be extra-careful here */
246 if (svp) 452 AV *av = (AV *)AvARRAY (padlist)[i--];
247 { 453 I32 j = AvFILLp (av);
248 SV *sv; 454
249 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 455 while (j >= 0)
456 SvREFCNT_dec (AvARRAY (av)[j--]);
457
458 AvFILLp (av) = -1;
250 SvREFCNT_dec (sv); 459 SvREFCNT_dec (av);
251
252 SvREFCNT_dec (*svp);
253 }
254 } 460 }
255 461
462 SvREFCNT_dec (AvARRAY (padlist)[0]);
463
464 AvFILLp (padlist) = -1;
256 SvREFCNT_dec ((SV*)padlist); 465 SvREFCNT_dec ((SV*)padlist);
257 } 466 }
258} 467}
259 468
260static int 469static int
261coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 470coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
262{ 471{
263 AV *padlist; 472 AV *padlist;
264 AV *av = (AV *)mg->mg_obj; 473 AV *av = (AV *)mg->mg_obj;
474
475 /* perl manages to free our internal AV and _then_ call us */
476 if (IN_DESTRUCT)
477 return 0;
265 478
266 /* casting is fun. */ 479 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 480 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (aTHX_ padlist); 481 free_padlist (aTHX_ padlist);
269 482
270 SvREFCNT_dec (av); 483 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
271 484
272 return 0; 485 return 0;
273} 486}
274 487
275#define PERL_MAGIC_coro PERL_MAGIC_ext 488static MGVTBL coro_cv_vtbl = {
276 489 0, 0, 0, 0,
277static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 490 coro_cv_free
278 491};
279#define CORO_MAGIC(cv) \
280 SvMAGIC (cv) \
281 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
282 ? SvMAGIC (cv) \
283 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
284 : 0
285 492
286/* the next two functions merely cache the padlists */ 493/* the next two functions merely cache the padlists */
287static void 494static void
288get_padlist (pTHX_ CV *cv) 495get_padlist (pTHX_ CV *cv)
289{ 496{
290 MAGIC *mg = CORO_MAGIC (cv); 497 MAGIC *mg = CORO_MAGIC_cv (cv);
291 AV *av; 498 AV *av;
292 499
293 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 500 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
294 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 501 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295 else 502 else
296 { 503 {
297#if CORO_PREFER_PERL_FUNCTIONS 504#if CORO_PREFER_PERL_FUNCTIONS
298 /* this is probably cleaner, but also slower? */ 505 /* this is probably cleaner? but also slower! */
506 /* in practise, it seems to be less stable */
299 CV *cp = Perl_cv_clone (cv); 507 CV *cp = Perl_cv_clone (aTHX_ cv);
300 CvPADLIST (cv) = CvPADLIST (cp); 508 CvPADLIST (cv) = CvPADLIST (cp);
301 CvPADLIST (cp) = 0; 509 CvPADLIST (cp) = 0;
302 SvREFCNT_dec (cp); 510 SvREFCNT_dec (cp);
303#else 511#else
304 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 512 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
305#endif 513#endif
306 } 514 }
307} 515}
308 516
309static void 517static void
310put_padlist (pTHX_ CV *cv) 518put_padlist (pTHX_ CV *cv)
311{ 519{
312 MAGIC *mg = CORO_MAGIC (cv); 520 MAGIC *mg = CORO_MAGIC_cv (cv);
313 AV *av; 521 AV *av;
314 522
315 if (!mg) 523 if (expect_false (!mg))
316 { 524 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
317 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
318 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
319 mg->mg_virtual = &vtbl_coro;
320 mg->mg_obj = (SV *)newAV ();
321 }
322 525
323 av = (AV *)mg->mg_obj; 526 av = (AV *)mg->mg_obj;
324 527
325 if (AvFILLp (av) >= AvMAX (av)) 528 if (expect_false (AvFILLp (av) >= AvMAX (av)))
326 av_extend (av, AvMAX (av) + 1); 529 av_extend (av, AvFILLp (av) + 1);
327 530
328 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 531 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
329} 532}
330 533
331/** load & save, init *******************************************************/ 534/** load & save, init *******************************************************/
332 535
333#define SB do { 536static void
334#define SE } while (0) 537on_enterleave_call (pTHX_ SV *cb);
335
336#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
337 538
338static void 539static void
339load_perl (pTHX_ Coro__State c) 540load_perl (pTHX_ Coro__State c)
340{ 541{
542 perl_slots *slot = c->slot;
543 c->slot = 0;
544
545 PL_mainstack = c->mainstack;
546
547 GvSV (PL_defgv) = slot->defsv;
548 GvAV (PL_defgv) = slot->defav;
549 GvSV (PL_errgv) = slot->errsv;
550 GvSV (irsgv) = slot->irsgv;
551 GvHV (PL_hintgv) = slot->hinthv;
552
341#define VAR(name,type) PL_ ## name = c->name; 553 #define VAR(name,type) PL_ ## name = slot->name;
342# include "state.h" 554 # include "state.h"
343#undef VAR 555 #undef VAR
344
345 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
346 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
347 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
348 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
349
350 if (c->irssv)
351 {
352 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
353 {
354 SvREFCNT_dec (c->irssv);
355 c->irssv = 0;
356 }
357 else
358 {
359 REPLACE_SV (PL_rs, c->irssv);
360 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
361 sv_setsv (c->irssv_sv, PL_rs);
362 }
363 }
364 556
365 { 557 {
366 dSP; 558 dSP;
559
367 CV *cv; 560 CV *cv;
368 561
369 /* now do the ugly restore mess */ 562 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 563 while (expect_true (cv = (CV *)POPs))
371 { 564 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */ 565 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvDEPTH (cv) = PTR2IV (POPs); 566 CvDEPTH (cv) = PTR2IV (POPs);
374 CvPADLIST (cv) = (AV *)POPs; 567 CvPADLIST (cv) = (AV *)POPs;
375 } 568 }
376 569
377 PUTBACK; 570 PUTBACK;
378 } 571 }
379 assert (!PL_comppad || AvARRAY (PL_comppad));//D 572
573 slf_frame = c->slf_frame;
574 CORO_THROW = c->except;
575
576 if (expect_false (enable_times))
577 {
578 if (expect_false (!times_valid))
579 coro_times_update ();
580
581 coro_times_sub (c);
582 }
583
584 if (expect_false (c->on_enter))
585 {
586 int i;
587
588 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
589 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
590 }
380} 591}
381 592
382static void 593static void
383save_perl (pTHX_ Coro__State c) 594save_perl (pTHX_ Coro__State c)
384{ 595{
385 assert (!PL_comppad || AvARRAY (PL_comppad));//D 596 if (expect_false (c->on_leave))
597 {
598 int i;
599
600 for (i = AvFILLp (c->on_leave); i >= 0; --i)
601 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
602 }
603
604 times_valid = 0;
605
606 if (expect_false (enable_times))
607 {
608 coro_times_update (); times_valid = 1;
609 coro_times_add (c);
610 }
611
612 c->except = CORO_THROW;
613 c->slf_frame = slf_frame;
614
386 { 615 {
387 dSP; 616 dSP;
388 I32 cxix = cxstack_ix; 617 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack; 618 PERL_CONTEXT *ccstk = cxstack;
390 PERL_SI *top_si = PL_curstackinfo; 619 PERL_SI *top_si = PL_curstackinfo;
… …
392 /* 621 /*
393 * the worst thing you can imagine happens first - we have to save 622 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :( 623 * (and reinitialize) all cv's in the whole callchain :(
395 */ 624 */
396 625
397 EXTEND (SP, 3 + 1);
398 PUSHs (Nullsv); 626 XPUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */ 627 /* this loop was inspired by pp_caller */
400 for (;;) 628 for (;;)
401 { 629 {
402 while (cxix >= 0) 630 while (expect_true (cxix >= 0))
403 { 631 {
404 PERL_CONTEXT *cx = &ccstk[cxix--]; 632 PERL_CONTEXT *cx = &ccstk[cxix--];
405 633
406 if (CxTYPE (cx) == CXt_SUB) 634 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
407 { 635 {
408 CV *cv = cx->blk_sub.cv; 636 CV *cv = cx->blk_sub.cv;
409 637
410 if (CvDEPTH (cv)) 638 if (expect_true (CvDEPTH (cv)))
411 { 639 {
412 EXTEND (SP, 3); 640 EXTEND (SP, 3);
413 PUSHs ((SV *)CvPADLIST (cv)); 641 PUSHs ((SV *)CvPADLIST (cv));
414 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 642 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
415 PUSHs ((SV *)cv); 643 PUSHs ((SV *)cv);
416 644
417 CvDEPTH (cv) = 0; 645 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv); 646 get_padlist (aTHX_ cv);
419 } 647 }
420 } 648 }
421 } 649 }
422 650
423 if (top_si->si_type == PERLSI_MAIN) 651 if (expect_true (top_si->si_type == PERLSI_MAIN))
424 break; 652 break;
425 653
426 top_si = top_si->si_prev; 654 top_si = top_si->si_prev;
427 ccstk = top_si->si_cxstack; 655 ccstk = top_si->si_cxstack;
428 cxix = top_si->si_cxix; 656 cxix = top_si->si_cxix;
429 } 657 }
430 658
431 PUTBACK; 659 PUTBACK;
432 } 660 }
433 661
434 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 662 /* allocate some space on the context stack for our purposes */
435 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 663 /* we manually unroll here, as usually 2 slots is enough */
436 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 664 if (SLOT_COUNT >= 1) CXINC;
437 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 665 if (SLOT_COUNT >= 2) CXINC;
438 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 666 if (SLOT_COUNT >= 3) CXINC;
667 {
668 unsigned int i;
669 for (i = 3; i < SLOT_COUNT; ++i)
670 CXINC;
671 }
672 cxstack_ix -= SLOT_COUNT; /* undo allocation */
439 673
674 c->mainstack = PL_mainstack;
675
676 {
677 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
678
679 slot->defav = GvAV (PL_defgv);
680 slot->defsv = DEFSV;
681 slot->errsv = ERRSV;
682 slot->irsgv = GvSV (irsgv);
683 slot->hinthv = GvHV (PL_hintgv);
684
440#define VAR(name,type)c->name = PL_ ## name; 685 #define VAR(name,type) slot->name = PL_ ## name;
441# include "state.h" 686 # include "state.h"
442#undef VAR 687 #undef VAR
688 }
443} 689}
444 690
445/* 691/*
446 * allocate various perl stacks. This is an exact copy 692 * allocate various perl stacks. This is almost an exact copy
447 * of perl.c:init_stacks, except that it uses less memory 693 * of perl.c:init_stacks, except that it uses less memory
448 * on the (sometimes correct) assumption that coroutines do 694 * on the (sometimes correct) assumption that coroutines do
449 * not usually need a lot of stackspace. 695 * not usually need a lot of stackspace.
450 */ 696 */
451#if CORO_PREFER_PERL_FUNCTIONS 697#if CORO_PREFER_PERL_FUNCTIONS
452# define coro_init_stacks init_stacks 698# define coro_init_stacks(thx) init_stacks ()
453#else 699#else
454static void 700static void
455coro_init_stacks (pTHX) 701coro_init_stacks (pTHX)
456{ 702{
457 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 703 PL_curstackinfo = new_stackinfo(32, 8);
458 PL_curstackinfo->si_type = PERLSI_MAIN; 704 PL_curstackinfo->si_type = PERLSI_MAIN;
459 PL_curstack = PL_curstackinfo->si_stack; 705 PL_curstack = PL_curstackinfo->si_stack;
460 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 706 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
461 707
462 PL_stack_base = AvARRAY(PL_curstack); 708 PL_stack_base = AvARRAY(PL_curstack);
463 PL_stack_sp = PL_stack_base; 709 PL_stack_sp = PL_stack_base;
464 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 710 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
465 711
466 New(50,PL_tmps_stack,128,SV*); 712 New(50,PL_tmps_stack,32,SV*);
467 PL_tmps_floor = -1; 713 PL_tmps_floor = -1;
468 PL_tmps_ix = -1; 714 PL_tmps_ix = -1;
469 PL_tmps_max = 128; 715 PL_tmps_max = 32;
470 716
471 New(54,PL_markstack,32,I32); 717 New(54,PL_markstack,16,I32);
472 PL_markstack_ptr = PL_markstack; 718 PL_markstack_ptr = PL_markstack;
473 PL_markstack_max = PL_markstack + 32; 719 PL_markstack_max = PL_markstack + 16;
474 720
475#ifdef SET_MARK_OFFSET 721#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 722 SET_MARK_OFFSET;
477#endif 723#endif
478 724
479 New(54,PL_scopestack,32,I32); 725 New(54,PL_scopestack,8,I32);
480 PL_scopestack_ix = 0; 726 PL_scopestack_ix = 0;
481 PL_scopestack_max = 32; 727 PL_scopestack_max = 8;
482 728
483 New(54,PL_savestack,64,ANY); 729 New(54,PL_savestack,24,ANY);
484 PL_savestack_ix = 0; 730 PL_savestack_ix = 0;
485 PL_savestack_max = 64; 731 PL_savestack_max = 24;
486 732
487#if !PERL_VERSION_ATLEAST (5,9,0) 733#if !PERL_VERSION_ATLEAST (5,10,0)
488 New(54,PL_retstack,16,OP*); 734 New(54,PL_retstack,4,OP*);
489 PL_retstack_ix = 0; 735 PL_retstack_ix = 0;
490 PL_retstack_max = 16; 736 PL_retstack_max = 4;
491#endif 737#endif
492} 738}
493#endif 739#endif
494 740
495/* 741/*
496 * destroy the stacks, the callchain etc... 742 * destroy the stacks, the callchain etc...
497 */ 743 */
498static void 744static void
499coro_destroy_stacks (pTHX) 745coro_destruct_stacks (pTHX)
500{ 746{
501 if (!IN_DESTRUCT)
502 {
503 /* restore all saved variables and stuff */
504 LEAVE_SCOPE (0);
505 assert (PL_tmps_floor == -1);
506
507 /* free all temporaries */
508 FREETMPS;
509 assert (PL_tmps_ix == -1);
510
511 /* unwind all extra stacks */
512 POPSTACK_TO (PL_mainstack);
513
514 /* unwind main stack */
515 dounwind (-1);
516 }
517
518 while (PL_curstackinfo->si_next) 747 while (PL_curstackinfo->si_next)
519 PL_curstackinfo = PL_curstackinfo->si_next; 748 PL_curstackinfo = PL_curstackinfo->si_next;
520 749
521 while (PL_curstackinfo) 750 while (PL_curstackinfo)
522 { 751 {
… …
532 761
533 Safefree (PL_tmps_stack); 762 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 763 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 764 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 765 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 766#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 767 Safefree (PL_retstack);
539#endif 768#endif
540} 769}
541 770
771#define CORO_RSS \
772 rss += sizeof (SYM (curstackinfo)); \
773 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
774 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
775 rss += SYM (tmps_max) * sizeof (SV *); \
776 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
777 rss += SYM (scopestack_max) * sizeof (I32); \
778 rss += SYM (savestack_max) * sizeof (ANY);
779
780static size_t
781coro_rss (pTHX_ struct coro *coro)
782{
783 size_t rss = sizeof (*coro);
784
785 if (coro->mainstack)
786 {
787 if (coro->flags & CF_RUNNING)
788 {
789 #define SYM(sym) PL_ ## sym
790 CORO_RSS;
791 #undef SYM
792 }
793 else
794 {
795 #define SYM(sym) coro->slot->sym
796 CORO_RSS;
797 #undef SYM
798 }
799 }
800
801 return rss;
802}
803
542/** coroutine stack handling ************************************************/ 804/** coroutine stack handling ************************************************/
543 805
806static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
807static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
808static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
809
810/* apparently < 5.8.8 */
811#ifndef MgPV_nolen_const
812#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
813 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
814 (const char*)(mg)->mg_ptr)
815#endif
816
817/*
818 * This overrides the default magic get method of %SIG elements.
819 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
820 * and instead of trying to save and restore the hash elements, we just provide
821 * readback here.
822 */
544static void 823static int
824coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
825{
826 const char *s = MgPV_nolen_const (mg);
827
828 if (*s == '_')
829 {
830 SV **svp = 0;
831
832 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
833 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
834
835 if (svp)
836 {
837 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
838 return 0;
839 }
840 }
841
842 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
843}
844
845static int
846coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
847{
848 const char *s = MgPV_nolen_const (mg);
849
850 if (*s == '_')
851 {
852 SV **svp = 0;
853
854 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
855 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
856
857 if (svp)
858 {
859 SV *old = *svp;
860 *svp = 0;
861 SvREFCNT_dec (old);
862 return 0;
863 }
864 }
865
866 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
867}
868
869static int
870coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
871{
872 const char *s = MgPV_nolen_const (mg);
873
874 if (*s == '_')
875 {
876 SV **svp = 0;
877
878 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
879 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
880
881 if (svp)
882 {
883 SV *old = *svp;
884 *svp = SvOK (sv) ? newSVsv (sv) : 0;
885 SvREFCNT_dec (old);
886 return 0;
887 }
888 }
889
890 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
891}
892
893static void
894prepare_nop (pTHX_ struct coro_transfer_args *ta)
895{
896 /* kind of mega-hacky, but works */
897 ta->next = ta->prev = (struct coro *)ta;
898}
899
900static int
901slf_check_nop (pTHX_ struct CoroSLF *frame)
902{
903 return 0;
904}
905
906static int
907slf_check_repeat (pTHX_ struct CoroSLF *frame)
908{
909 return 1;
910}
911
912static UNOP coro_setup_op;
913
914static void NOINLINE /* noinline to keep it out of the transfer fast path */
545setup_coro (pTHX_ struct coro *coro) 915coro_setup (pTHX_ struct coro *coro)
546{ 916{
547 /* 917 /*
548 * emulate part of the perl startup here. 918 * emulate part of the perl startup here.
549 */ 919 */
550 coro_init_stacks (aTHX); 920 coro_init_stacks (aTHX);
551 921
922 PL_runops = RUNOPS_DEFAULT;
552 PL_curcop = &PL_compiling; 923 PL_curcop = &PL_compiling;
553 PL_in_eval = EVAL_NULL; 924 PL_in_eval = EVAL_NULL;
554 PL_comppad = 0; 925 PL_comppad = 0;
926 PL_comppad_name = 0;
927 PL_comppad_name_fill = 0;
928 PL_comppad_name_floor = 0;
555 PL_curpm = 0; 929 PL_curpm = 0;
930 PL_curpad = 0;
556 PL_localizing = 0; 931 PL_localizing = 0;
557 PL_dirty = 0; 932 PL_dirty = 0;
558 PL_restartop = 0; 933 PL_restartop = 0;
934#if PERL_VERSION_ATLEAST (5,10,0)
935 PL_parser = 0;
936#endif
937 PL_hints = 0;
938
939 /* recreate the die/warn hooks */
940 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
941 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
942
943 GvSV (PL_defgv) = newSV (0);
944 GvAV (PL_defgv) = coro->args; coro->args = 0;
945 GvSV (PL_errgv) = newSV (0);
946 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
947 GvHV (PL_hintgv) = 0;
948 PL_rs = newSVsv (GvSV (irsgv));
949 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
559 950
560 { 951 {
561 dSP; 952 dSP;
562 LOGOP myop; 953 UNOP myop;
563 954
564 SvREFCNT_dec (GvAV (PL_defgv));
565 GvAV (PL_defgv) = coro->args; coro->args = 0;
566
567 Zero (&myop, 1, LOGOP); 955 Zero (&myop, 1, UNOP);
568 myop.op_next = Nullop; 956 myop.op_next = Nullop;
957 myop.op_type = OP_ENTERSUB;
569 myop.op_flags = OPf_WANT_VOID; 958 myop.op_flags = OPf_WANT_VOID;
570 959
571 PUSHMARK (SP); 960 PUSHMARK (SP);
572 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 961 PUSHs ((SV *)coro->startcv);
573 PUTBACK; 962 PUTBACK;
574 PL_op = (OP *)&myop; 963 PL_op = (OP *)&myop;
575 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 964 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
576 SPAGAIN;
577 } 965 }
578 966
579 ENTER; /* necessary e.g. for dounwind */ 967 /* this newly created coroutine might be run on an existing cctx which most
580} 968 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
969 */
970 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
971 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
581 972
973 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
974 coro_setup_op.op_next = PL_op;
975 coro_setup_op.op_type = OP_ENTERSUB;
976 coro_setup_op.op_ppaddr = pp_slf;
977 /* no flags etc. required, as an init function won't be called */
978
979 PL_op = (OP *)&coro_setup_op;
980
981 /* copy throw, in case it was set before coro_setup */
982 CORO_THROW = coro->except;
983
984 if (expect_false (enable_times))
985 {
986 coro_times_update ();
987 coro_times_sub (coro);
988 }
989}
990
582static void 991static void
992coro_unwind_stacks (pTHX)
993{
994 if (!IN_DESTRUCT)
995 {
996 /* restore all saved variables and stuff */
997 LEAVE_SCOPE (0);
998 assert (PL_tmps_floor == -1);
999
1000 /* free all temporaries */
1001 FREETMPS;
1002 assert (PL_tmps_ix == -1);
1003
1004 /* unwind all extra stacks */
1005 POPSTACK_TO (PL_mainstack);
1006
1007 /* unwind main stack */
1008 dounwind (-1);
1009 }
1010}
1011
1012static void
1013coro_destruct_perl (pTHX_ struct coro *coro)
1014{
1015 SV *svf [9];
1016
1017 {
1018 struct coro *current = SvSTATE_current;
1019
1020 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1021
1022 save_perl (aTHX_ current);
1023 load_perl (aTHX_ coro);
1024
1025 coro_unwind_stacks (aTHX);
1026 coro_destruct_stacks (aTHX);
1027
1028 // now save some sv's to be free'd later
1029 svf [0] = GvSV (PL_defgv);
1030 svf [1] = (SV *)GvAV (PL_defgv);
1031 svf [2] = GvSV (PL_errgv);
1032 svf [3] = (SV *)PL_defoutgv;
1033 svf [4] = PL_rs;
1034 svf [5] = GvSV (irsgv);
1035 svf [6] = (SV *)GvHV (PL_hintgv);
1036 svf [7] = PL_diehook;
1037 svf [8] = PL_warnhook;
1038 assert (9 == sizeof (svf) / sizeof (*svf));
1039
1040 load_perl (aTHX_ current);
1041 }
1042
1043 {
1044 unsigned int i;
1045
1046 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1047 SvREFCNT_dec (svf [i]);
1048
1049 SvREFCNT_dec (coro->saved_deffh);
1050 SvREFCNT_dec (coro->rouse_cb);
1051 SvREFCNT_dec (coro->invoke_cb);
1052 SvREFCNT_dec (coro->invoke_av);
1053 }
1054}
1055
1056INLINE void
583free_coro_mortal (pTHX) 1057free_coro_mortal (pTHX)
584{ 1058{
585 if (coro_mortal) 1059 if (expect_true (coro_mortal))
586 { 1060 {
587 SvREFCNT_dec (coro_mortal); 1061 SvREFCNT_dec (coro_mortal);
588 coro_mortal = 0; 1062 coro_mortal = 0;
589 } 1063 }
590} 1064}
591 1065
592/* inject a fake call to Coro::State::_cctx_init into the execution */ 1066static int
593/* _cctx_init shoukld be careful, as it could be called at almost any time */ 1067runops_trace (pTHX)
594/* during execution of a pelr program */ 1068{
1069 COP *oldcop = 0;
1070 int oldcxix = -2;
1071
1072 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1073 {
1074 PERL_ASYNC_CHECK ();
1075
1076 if (cctx_current->flags & CC_TRACE_ALL)
1077 {
1078 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1079 {
1080 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1081 SV **bot, **top;
1082 AV *av = newAV (); /* return values */
1083 SV **cb;
1084 dSP;
1085
1086 GV *gv = CvGV (cx->blk_sub.cv);
1087 SV *fullname = sv_2mortal (newSV (0));
1088 if (isGV (gv))
1089 gv_efullname3 (fullname, gv, 0);
1090
1091 bot = PL_stack_base + cx->blk_oldsp + 1;
1092 top = cx->blk_gimme == G_ARRAY ? SP + 1
1093 : cx->blk_gimme == G_SCALAR ? bot + 1
1094 : bot;
1095
1096 av_extend (av, top - bot);
1097 while (bot < top)
1098 av_push (av, SvREFCNT_inc_NN (*bot++));
1099
1100 PL_runops = RUNOPS_DEFAULT;
1101 ENTER;
1102 SAVETMPS;
1103 EXTEND (SP, 3);
1104 PUSHMARK (SP);
1105 PUSHs (&PL_sv_no);
1106 PUSHs (fullname);
1107 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1108 PUTBACK;
1109 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1110 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1111 SPAGAIN;
1112 FREETMPS;
1113 LEAVE;
1114 PL_runops = runops_trace;
1115 }
1116
1117 if (oldcop != PL_curcop)
1118 {
1119 oldcop = PL_curcop;
1120
1121 if (PL_curcop != &PL_compiling)
1122 {
1123 SV **cb;
1124
1125 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1126 {
1127 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1128
1129 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1130 {
1131 dSP;
1132 GV *gv = CvGV (cx->blk_sub.cv);
1133 SV *fullname = sv_2mortal (newSV (0));
1134
1135 if (isGV (gv))
1136 gv_efullname3 (fullname, gv, 0);
1137
1138 PL_runops = RUNOPS_DEFAULT;
1139 ENTER;
1140 SAVETMPS;
1141 EXTEND (SP, 3);
1142 PUSHMARK (SP);
1143 PUSHs (&PL_sv_yes);
1144 PUSHs (fullname);
1145 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1146 PUTBACK;
1147 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1148 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1149 SPAGAIN;
1150 FREETMPS;
1151 LEAVE;
1152 PL_runops = runops_trace;
1153 }
1154
1155 oldcxix = cxstack_ix;
1156 }
1157
1158 if (cctx_current->flags & CC_TRACE_LINE)
1159 {
1160 dSP;
1161
1162 PL_runops = RUNOPS_DEFAULT;
1163 ENTER;
1164 SAVETMPS;
1165 EXTEND (SP, 3);
1166 PL_runops = RUNOPS_DEFAULT;
1167 PUSHMARK (SP);
1168 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1169 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1170 PUTBACK;
1171 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1172 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1173 SPAGAIN;
1174 FREETMPS;
1175 LEAVE;
1176 PL_runops = runops_trace;
1177 }
1178 }
1179 }
1180 }
1181 }
1182
1183 TAINT_NOT;
1184 return 0;
1185}
1186
1187static struct CoroSLF cctx_ssl_frame;
1188
1189static void
1190slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1191{
1192 ta->prev = 0;
1193}
1194
1195static int
1196slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1197{
1198 *frame = cctx_ssl_frame;
1199
1200 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1201}
1202
1203/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
595static void NOINLINE 1204static void NOINLINE
596prepare_cctx (pTHX_ coro_cctx *cctx) 1205cctx_prepare (pTHX)
597{ 1206{
598 dSP; 1207 PL_top_env = &PL_start_env;
599 LOGOP myop;
600 1208
601 Zero (&myop, 1, LOGOP); 1209 if (cctx_current->flags & CC_TRACE)
602 myop.op_next = PL_op; 1210 PL_runops = runops_trace;
603 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
604 1211
605 PUSHMARK (SP); 1212 /* we already must be executing an SLF op, there is no other valid way
606 EXTEND (SP, 2); 1213 * that can lead to creation of a new cctx */
607 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1214 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
608 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1215 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
609 PUTBACK; 1216
610 PL_op = (OP *)&myop; 1217 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
611 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1218 cctx_ssl_frame = slf_frame;
612 SPAGAIN; 1219
1220 slf_frame.prepare = slf_prepare_set_stacklevel;
1221 slf_frame.check = slf_check_set_stacklevel;
1222}
1223
1224/* the tail of transfer: execute stuff we can only do after a transfer */
1225INLINE void
1226transfer_tail (pTHX)
1227{
1228 free_coro_mortal (aTHX);
613} 1229}
614 1230
615/* 1231/*
616 * this is a _very_ stripped down perl interpreter ;) 1232 * this is a _very_ stripped down perl interpreter ;)
617 */ 1233 */
618static void 1234static void
619coro_run (void *arg) 1235cctx_run (void *arg)
620{ 1236{
1237#ifdef USE_ITHREADS
1238# if CORO_PTHREAD
1239 PERL_SET_CONTEXT (coro_thx);
1240# endif
1241#endif
1242 {
621 dTHX; 1243 dTHX;
622 1244
623 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1245 /* normally we would need to skip the entersub here */
624 UNLOCK; 1246 /* not doing so will re-execute it, which is exactly what we want */
1247 /* PL_nop = PL_nop->op_next */
625 1248
626 PL_top_env = &PL_start_env;
627
628 /* inject a fake subroutine call to cctx_init */ 1249 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx (aTHX_ (coro_cctx *)arg); 1250 cctx_prepare (aTHX);
630 1251
1252 /* cctx_run is the alternative tail of transfer() */
1253 transfer_tail (aTHX);
1254
631 /* somebody or something will hit me for both perl_run and PL_restartop */ 1255 /* somebody or something will hit me for both perl_run and PL_restartop */
632 PL_restartop = PL_op; 1256 PL_restartop = PL_op;
633 perl_run (PL_curinterp); 1257 perl_run (PL_curinterp);
1258 /*
1259 * Unfortunately, there is no way to get at the return values of the
1260 * coro body here, as perl_run destroys these
1261 */
634 1262
1263 /*
635 /* If perl-run returns we assume exit() was being called, which */ 1264 * If perl-run returns we assume exit() was being called or the coro
636 /* seems to be the only valid (non-bug) reason for perl_run to return. */ 1265 * fell off the end, which seems to be the only valid (non-bug)
637 /* We try to exit by jumping to the bootstrap-time "top" top_env, as */ 1266 * reason for perl_run to return. We try to exit by jumping to the
638 /* we cannot restore the "main" coroutine as Coro has no such concept */ 1267 * bootstrap-time "top" top_env, as we cannot restore the "main"
1268 * coroutine as Coro has no such concept.
1269 * This actually isn't valid with the pthread backend, but OSes requiring
1270 * that backend are too broken to do it in a standards-compliant way.
1271 */
639 PL_top_env = main_top_env; 1272 PL_top_env = main_top_env;
640 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1273 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1274 }
641} 1275}
642 1276
643static coro_cctx * 1277static coro_cctx *
644cctx_new () 1278cctx_new ()
645{ 1279{
646 coro_cctx *cctx; 1280 coro_cctx *cctx;
1281
1282 ++cctx_count;
1283 New (0, cctx, 1, coro_cctx);
1284
1285 cctx->gen = cctx_gen;
1286 cctx->flags = 0;
1287 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1288
1289 return cctx;
1290}
1291
1292/* create a new cctx only suitable as source */
1293static coro_cctx *
1294cctx_new_empty ()
1295{
1296 coro_cctx *cctx = cctx_new ();
1297
1298 cctx->sptr = 0;
1299 coro_create (&cctx->cctx, 0, 0, 0, 0);
1300
1301 return cctx;
1302}
1303
1304/* create a new cctx suitable as destination/running a perl interpreter */
1305static coro_cctx *
1306cctx_new_run ()
1307{
1308 coro_cctx *cctx = cctx_new ();
647 void *stack_start; 1309 void *stack_start;
648 size_t stack_size; 1310 size_t stack_size;
649 1311
650 ++cctx_count;
651
652 Newz (0, cctx, 1, coro_cctx);
653
654#if HAVE_MMAP 1312#if HAVE_MMAP
655
656 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1313 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
657 /* mmap supposedly does allocate-on-write for us */ 1314 /* mmap supposedly does allocate-on-write for us */
658 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1315 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659 1316
660 if (cctx->sptr != (void *)-1) 1317 if (cctx->sptr != (void *)-1)
661 { 1318 {
662# if CORO_STACKGUARD 1319 #if CORO_STACKGUARD
663 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1320 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
664# endif 1321 #endif
665 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1322 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
666 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1323 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
667 cctx->mapped = 1; 1324 cctx->flags |= CC_MAPPED;
668 } 1325 }
669 else 1326 else
670#endif 1327#endif
671 { 1328 {
672 cctx->ssize = coro_stacksize * (long)sizeof (long); 1329 cctx->ssize = cctx_stacksize * (long)sizeof (long);
673 New (0, cctx->sptr, coro_stacksize, long); 1330 New (0, cctx->sptr, cctx_stacksize, long);
674 1331
675 if (!cctx->sptr) 1332 if (!cctx->sptr)
676 { 1333 {
677 perror ("FATAL: unable to allocate stack for coroutine"); 1334 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
678 _exit (EXIT_FAILURE); 1335 _exit (EXIT_FAILURE);
679 } 1336 }
680 1337
681 stack_start = cctx->sptr; 1338 stack_start = cctx->sptr;
682 stack_size = cctx->ssize; 1339 stack_size = cctx->ssize;
683 } 1340 }
684 1341
685 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1342 #if CORO_USE_VALGRIND
1343 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1344 #endif
1345
686 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1346 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
687 1347
688 return cctx; 1348 return cctx;
689} 1349}
690 1350
691static void 1351static void
692cctx_destroy (coro_cctx *cctx) 1352cctx_destroy (coro_cctx *cctx)
693{ 1353{
694 if (!cctx) 1354 if (!cctx)
695 return; 1355 return;
696 1356
1357 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1358
697 --cctx_count; 1359 --cctx_count;
1360 coro_destroy (&cctx->cctx);
698 1361
1362 /* coro_transfer creates new, empty cctx's */
1363 if (cctx->sptr)
1364 {
699#if CORO_USE_VALGRIND 1365 #if CORO_USE_VALGRIND
700 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1366 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1367 #endif
1368
1369#if HAVE_MMAP
1370 if (cctx->flags & CC_MAPPED)
1371 munmap (cctx->sptr, cctx->ssize);
1372 else
701#endif 1373#endif
702
703#if HAVE_MMAP
704 if (cctx->mapped)
705 munmap (cctx->sptr, cctx->ssize);
706 else
707#endif
708 Safefree (cctx->sptr); 1374 Safefree (cctx->sptr);
1375 }
709 1376
710 Safefree (cctx); 1377 Safefree (cctx);
711} 1378}
1379
1380/* wether this cctx should be destructed */
1381#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
712 1382
713static coro_cctx * 1383static coro_cctx *
714cctx_get (pTHX) 1384cctx_get (pTHX)
715{ 1385{
716 while (cctx_first) 1386 while (expect_true (cctx_first))
717 { 1387 {
718 coro_cctx *cctx = cctx_first; 1388 coro_cctx *cctx = cctx_first;
719 cctx_first = cctx->next; 1389 cctx_first = cctx->next;
720 --cctx_idle; 1390 --cctx_idle;
721 1391
722 if (cctx->ssize >= coro_stacksize) 1392 if (expect_true (!CCTX_EXPIRED (cctx)))
723 return cctx; 1393 return cctx;
724 1394
725 cctx_destroy (cctx); 1395 cctx_destroy (cctx);
726 } 1396 }
727 1397
728 PL_op = PL_op->op_next;
729 return cctx_new (); 1398 return cctx_new_run ();
730} 1399}
731 1400
732static void 1401static void
733cctx_put (coro_cctx *cctx) 1402cctx_put (coro_cctx *cctx)
734{ 1403{
1404 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1405
735 /* free another cctx if overlimit */ 1406 /* free another cctx if overlimit */
736 if (cctx_idle >= MAX_IDLE_CCTX) 1407 if (expect_false (cctx_idle >= cctx_max_idle))
737 { 1408 {
738 coro_cctx *first = cctx_first; 1409 coro_cctx *first = cctx_first;
739 cctx_first = first->next; 1410 cctx_first = first->next;
740 --cctx_idle; 1411 --cctx_idle;
741 1412
742 assert (!first->inuse);
743 cctx_destroy (first); 1413 cctx_destroy (first);
744 } 1414 }
745 1415
746 ++cctx_idle; 1416 ++cctx_idle;
747 cctx->next = cctx_first; 1417 cctx->next = cctx_first;
748 cctx_first = cctx; 1418 cctx_first = cctx;
749} 1419}
750 1420
751/** coroutine switching *****************************************************/ 1421/** coroutine switching *****************************************************/
752 1422
753/* never call directly, always through the coro_state_transfer global variable */ 1423static void
754static void NOINLINE
755transfer (pTHX_ struct coro *prev, struct coro *next) 1424transfer_check (pTHX_ struct coro *prev, struct coro *next)
1425{
1426 /* TODO: throwing up here is considered harmful */
1427
1428 if (expect_true (prev != next))
1429 {
1430 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1431 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1432
1433 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1434 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1435
1436#if !PERL_VERSION_ATLEAST (5,10,0)
1437 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1438 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1439#endif
1440 }
1441}
1442
1443/* always use the TRANSFER macro */
1444static void NOINLINE /* noinline so we have a fixed stackframe */
1445transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
756{ 1446{
757 dSTACKLEVEL; 1447 dSTACKLEVEL;
758 1448
759 /* sometimes transfer is only called to set idle_sp */ 1449 /* sometimes transfer is only called to set idle_sp */
760 if (!next) 1450 if (expect_false (!prev))
761 { 1451 {
762 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1452 cctx_current->idle_sp = STACKLEVEL;
763 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1453 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
764 }
765 else if (prev != next)
766 { 1454 }
1455 else if (expect_true (prev != next))
1456 {
767 coro_cctx *prev__cctx; 1457 coro_cctx *cctx_prev;
768 1458
769 if (prev->flags & CF_NEW) 1459 if (expect_false (prev->flags & CF_NEW))
770 { 1460 {
771 /* create a new empty context */ 1461 /* create a new empty/source context */
772 Newz (0, prev->cctx, 1, coro_cctx);
773 prev->cctx->inuse = 1;
774 prev->flags &= ~CF_NEW; 1462 prev->flags &= ~CF_NEW;
775 prev->flags |= CF_RUNNING; 1463 prev->flags |= CF_RUNNING;
776 } 1464 }
777 1465
778 /*TODO: must not croak here */
779 if (!prev->flags & CF_RUNNING)
780 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
781
782 if (next->flags & CF_RUNNING)
783 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
784
785 if (next->flags & CF_DESTROYED)
786 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
787
788 prev->flags &= ~CF_RUNNING; 1466 prev->flags &= ~CF_RUNNING;
789 next->flags |= CF_RUNNING; 1467 next->flags |= CF_RUNNING;
790 1468
791 LOCK; 1469 /* first get rid of the old state */
1470 save_perl (aTHX_ prev);
792 1471
793 if (next->flags & CF_NEW) 1472 if (expect_false (next->flags & CF_NEW))
794 { 1473 {
795 /* need to start coroutine */ 1474 /* need to start coroutine */
796 next->flags &= ~CF_NEW; 1475 next->flags &= ~CF_NEW;
797 /* first get rid of the old state */
798 save_perl (aTHX_ prev);
799 /* setup coroutine call */ 1476 /* setup coroutine call */
800 setup_coro (aTHX_ next); 1477 coro_setup (aTHX_ next);
801 /* need a new stack */
802 assert (!next->cctx);
803 } 1478 }
804 else 1479 else
1480 load_perl (aTHX_ next);
1481
1482 /* possibly untie and reuse the cctx */
1483 if (expect_true (
1484 cctx_current->idle_sp == STACKLEVEL
1485 && !(cctx_current->flags & CC_TRACE)
1486 && !force_cctx
1487 ))
805 { 1488 {
806 /* coroutine already started */ 1489 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
807 save_perl (aTHX_ prev); 1490 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
808 load_perl (aTHX_ next); 1491
1492 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1493 /* without this the next cctx_get might destroy the running cctx while still in use */
1494 if (expect_false (CCTX_EXPIRED (cctx_current)))
1495 if (expect_true (!next->cctx))
1496 next->cctx = cctx_get (aTHX);
1497
1498 cctx_put (cctx_current);
809 } 1499 }
1500 else
1501 prev->cctx = cctx_current;
810 1502
811 prev__cctx = prev->cctx; 1503 ++next->usecount;
812 1504
813 /* possibly "free" the cctx */ 1505 cctx_prev = cctx_current;
814 if (prev__cctx->idle_sp == STACKLEVEL) 1506 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1507
1508 next->cctx = 0;
1509
1510 if (expect_false (cctx_prev != cctx_current))
815 { 1511 {
816 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1512 cctx_prev->top_env = PL_top_env;
817 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1513 PL_top_env = cctx_current->top_env;
818 1514 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
819 prev->cctx = 0;
820
821 cctx_put (prev__cctx);
822 prev__cctx->inuse = 0;
823 } 1515 }
824 1516
825 if (!next->cctx) 1517 transfer_tail (aTHX);
826 {
827 next->cctx = cctx_get (aTHX);
828 assert (!next->cctx->inuse);
829 next->cctx->inuse = 1;
830 }
831
832 if (prev__cctx != next->cctx)
833 {
834 prev__cctx->top_env = PL_top_env;
835 PL_top_env = next->cctx->top_env;
836 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
837 }
838
839 free_coro_mortal (aTHX);
840 UNLOCK;
841 } 1518 }
842} 1519}
843 1520
844struct transfer_args 1521#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
845{
846 struct coro *prev, *next;
847};
848
849#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1522#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
850 1523
851/** high level stuff ********************************************************/ 1524/** high level stuff ********************************************************/
852 1525
853static int 1526static int
854coro_state_destroy (pTHX_ struct coro *coro) 1527coro_state_destroy (pTHX_ struct coro *coro)
855{ 1528{
856 if (coro->flags & CF_DESTROYED) 1529 if (coro->flags & CF_DESTROYED)
857 return 0; 1530 return 0;
1531
1532 if (coro->on_destroy && !PL_dirty)
1533 coro->on_destroy (aTHX_ coro);
858 1534
859 coro->flags |= CF_DESTROYED; 1535 coro->flags |= CF_DESTROYED;
860 1536
861 if (coro->flags & CF_READY) 1537 if (coro->flags & CF_READY)
862 { 1538 {
863 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1539 /* reduce nready, as destroying a ready coro effectively unreadies it */
864 /* alternative: look through all ready queues and remove the coro */ 1540 /* alternative: look through all ready queues and remove the coro */
865 LOCK;
866 --coro_nready; 1541 --coro_nready;
867 UNLOCK;
868 } 1542 }
869 else 1543 else
870 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1544 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
871 1545
872 if (coro->mainstack && coro->mainstack != main_mainstack) 1546 if (coro->mainstack
873 { 1547 && coro->mainstack != main_mainstack
874 struct coro temp; 1548 && coro->slot
875 1549 && !PL_dirty)
876 assert (!(coro->flags & CF_RUNNING));
877
878 Zero (&temp, 1, struct coro);
879 temp.save = CORO_SAVE_DEF;
880
881 if (coro->flags & CF_RUNNING)
882 croak ("FATAL: tried to destroy currently running coroutine");
883
884 save_perl (aTHX_ &temp);
885 load_perl (aTHX_ coro); 1550 coro_destruct_perl (aTHX_ coro);
886
887 coro_destroy_stacks (aTHX);
888
889 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
890
891 coro->mainstack = 0;
892 }
893 1551
894 cctx_destroy (coro->cctx); 1552 cctx_destroy (coro->cctx);
1553 SvREFCNT_dec (coro->startcv);
895 SvREFCNT_dec (coro->args); 1554 SvREFCNT_dec (coro->args);
1555 SvREFCNT_dec (CORO_THROW);
1556
1557 if (coro->next) coro->next->prev = coro->prev;
1558 if (coro->prev) coro->prev->next = coro->next;
1559 if (coro == coro_first) coro_first = coro->next;
896 1560
897 return 1; 1561 return 1;
898} 1562}
899 1563
900static int 1564static int
901coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1565coro_state_free (pTHX_ SV *sv, MAGIC *mg)
902{ 1566{
903 struct coro *coro = (struct coro *)mg->mg_ptr; 1567 struct coro *coro = (struct coro *)mg->mg_ptr;
904 mg->mg_ptr = 0; 1568 mg->mg_ptr = 0;
1569
1570 coro->hv = 0;
905 1571
906 if (--coro->refcnt < 0) 1572 if (--coro->refcnt < 0)
907 { 1573 {
908 coro_state_destroy (aTHX_ coro); 1574 coro_state_destroy (aTHX_ coro);
909 Safefree (coro); 1575 Safefree (coro);
… …
931#else 1597#else
932# define MGf_DUP 0 1598# define MGf_DUP 0
933#endif 1599#endif
934}; 1600};
935 1601
936static struct coro *
937SvSTATE_ (pTHX_ SV *coro)
938{
939 HV *stash;
940 MAGIC *mg;
941
942 if (SvROK (coro))
943 coro = SvRV (coro);
944
945 stash = SvSTASH (coro);
946 if (stash != coro_stash && stash != coro_state_stash)
947 {
948 /* very slow, but rare, check */
949 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
950 croak ("Coro::State object required");
951 }
952
953 mg = CORO_MAGIC (coro);
954 return (struct coro *)mg->mg_ptr;
955}
956
957#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
958
959static void 1602static void
960prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1603prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
961{ 1604{
962 ta->prev = SvSTATE (prev_sv); 1605 ta->prev = SvSTATE (prev_sv);
963 ta->next = SvSTATE (next_sv); 1606 ta->next = SvSTATE (next_sv);
1607 TRANSFER_CHECK (*ta);
964} 1608}
965 1609
966static void 1610static void
967api_transfer (SV *prev_sv, SV *next_sv) 1611api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
968{ 1612{
969 dTHX;
970 struct transfer_args ta; 1613 struct coro_transfer_args ta;
971 1614
972 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1615 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
973 TRANSFER (ta); 1616 TRANSFER (ta, 1);
1617}
1618
1619/** Coro ********************************************************************/
1620
1621INLINE void
1622coro_enq (pTHX_ struct coro *coro)
1623{
1624 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1625
1626 SvREFCNT_inc_NN (coro->hv);
1627
1628 coro->next_ready = 0;
1629 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1630 ready [1] = coro;
1631}
1632
1633INLINE struct coro *
1634coro_deq (pTHX)
1635{
1636 int prio;
1637
1638 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1639 {
1640 struct coro **ready = coro_ready [prio];
1641
1642 if (ready [0])
1643 {
1644 struct coro *coro = ready [0];
1645 ready [0] = coro->next_ready;
1646 return coro;
1647 }
1648 }
1649
1650 return 0;
974} 1651}
975 1652
976static int 1653static int
977api_save (SV *coro_sv, int new_save)
978{
979 dTHX;
980 struct coro *coro = SvSTATE (coro_sv);
981 int old_save = coro->save;
982
983 if (new_save >= 0)
984 coro->save = new_save;
985
986 return old_save;
987}
988
989/** Coro ********************************************************************/
990
991static void
992coro_enq (pTHX_ SV *coro_sv)
993{
994 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
995}
996
997static SV *
998coro_deq (pTHX_ int min_prio)
999{
1000 int prio = PRIO_MAX - PRIO_MIN;
1001
1002 min_prio -= PRIO_MIN;
1003 if (min_prio < 0)
1004 min_prio = 0;
1005
1006 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1007 if (AvFILLp (coro_ready [prio]) >= 0)
1008 return av_shift (coro_ready [prio]);
1009
1010 return 0;
1011}
1012
1013static int
1014api_ready (SV *coro_sv) 1654api_ready (pTHX_ SV *coro_sv)
1015{ 1655{
1016 dTHX;
1017 struct coro *coro; 1656 struct coro *coro;
1018 1657 SV *sv_hook;
1019 if (SvROK (coro_sv)) 1658 void (*xs_hook)(void);
1020 coro_sv = SvRV (coro_sv);
1021 1659
1022 coro = SvSTATE (coro_sv); 1660 coro = SvSTATE (coro_sv);
1023 1661
1024 if (coro->flags & CF_READY) 1662 if (coro->flags & CF_READY)
1025 return 0; 1663 return 0;
1026 1664
1027 coro->flags |= CF_READY; 1665 coro->flags |= CF_READY;
1028 1666
1029 LOCK; 1667 sv_hook = coro_nready ? 0 : coro_readyhook;
1030 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1668 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1669
1670 coro_enq (aTHX_ coro);
1031 ++coro_nready; 1671 ++coro_nready;
1032 UNLOCK; 1672
1673 if (sv_hook)
1674 {
1675 dSP;
1676
1677 ENTER;
1678 SAVETMPS;
1679
1680 PUSHMARK (SP);
1681 PUTBACK;
1682 call_sv (sv_hook, G_VOID | G_DISCARD);
1683
1684 FREETMPS;
1685 LEAVE;
1686 }
1687
1688 if (xs_hook)
1689 xs_hook ();
1033 1690
1034 return 1; 1691 return 1;
1035} 1692}
1036 1693
1037static int 1694static int
1038api_is_ready (SV *coro_sv) 1695api_is_ready (pTHX_ SV *coro_sv)
1039{ 1696{
1040 dTHX;
1041 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1697 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1042} 1698}
1043 1699
1700/* expects to own a reference to next->hv */
1701INLINE void
1702prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1703{
1704 SV *prev_sv = SvRV (coro_current);
1705
1706 ta->prev = SvSTATE_hv (prev_sv);
1707 ta->next = next;
1708
1709 TRANSFER_CHECK (*ta);
1710
1711 SvRV_set (coro_current, (SV *)next->hv);
1712
1713 free_coro_mortal (aTHX);
1714 coro_mortal = prev_sv;
1715}
1716
1044static void 1717static void
1045prepare_schedule (pTHX_ struct transfer_args *ta) 1718prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1046{ 1719{
1047 SV *prev_sv, *next_sv;
1048
1049 for (;;) 1720 for (;;)
1050 { 1721 {
1051 LOCK; 1722 struct coro *next = coro_deq (aTHX);
1052 next_sv = coro_deq (aTHX_ PRIO_MIN);
1053 1723
1724 if (expect_true (next))
1725 {
1726 /* cannot transfer to destroyed coros, skip and look for next */
1727 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1728 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1729 else
1730 {
1731 next->flags &= ~CF_READY;
1732 --coro_nready;
1733
1734 prepare_schedule_to (aTHX_ ta, next);
1735 break;
1736 }
1737 }
1738 else
1739 {
1054 /* nothing to schedule: call the idle handler */ 1740 /* nothing to schedule: call the idle handler */
1055 if (!next_sv) 1741 if (SvROK (sv_idle)
1742 && SvOBJECT (SvRV (sv_idle)))
1743 {
1744 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1745 api_ready (aTHX_ SvRV (sv_idle));
1746 --coro_nready;
1747 }
1748 else
1749 {
1750 dSP;
1751
1752 ENTER;
1753 SAVETMPS;
1754
1755 PUSHMARK (SP);
1756 PUTBACK;
1757 call_sv (sv_idle, G_VOID | G_DISCARD);
1758
1759 FREETMPS;
1760 LEAVE;
1761 }
1762 }
1763 }
1764}
1765
1766INLINE void
1767prepare_cede (pTHX_ struct coro_transfer_args *ta)
1768{
1769 api_ready (aTHX_ coro_current);
1770 prepare_schedule (aTHX_ ta);
1771}
1772
1773INLINE void
1774prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1775{
1776 SV *prev = SvRV (coro_current);
1777
1778 if (coro_nready)
1779 {
1780 prepare_schedule (aTHX_ ta);
1781 api_ready (aTHX_ prev);
1782 }
1783 else
1784 prepare_nop (aTHX_ ta);
1785}
1786
1787static void
1788api_schedule (pTHX)
1789{
1790 struct coro_transfer_args ta;
1791
1792 prepare_schedule (aTHX_ &ta);
1793 TRANSFER (ta, 1);
1794}
1795
1796static void
1797api_schedule_to (pTHX_ SV *coro_sv)
1798{
1799 struct coro_transfer_args ta;
1800 struct coro *next = SvSTATE (coro_sv);
1801
1802 SvREFCNT_inc_NN (coro_sv);
1803 prepare_schedule_to (aTHX_ &ta, next);
1804}
1805
1806static int
1807api_cede (pTHX)
1808{
1809 struct coro_transfer_args ta;
1810
1811 prepare_cede (aTHX_ &ta);
1812
1813 if (expect_true (ta.prev != ta.next))
1814 {
1815 TRANSFER (ta, 1);
1816 return 1;
1817 }
1818 else
1819 return 0;
1820}
1821
1822static int
1823api_cede_notself (pTHX)
1824{
1825 if (coro_nready)
1826 {
1827 struct coro_transfer_args ta;
1828
1829 prepare_cede_notself (aTHX_ &ta);
1830 TRANSFER (ta, 1);
1831 return 1;
1832 }
1833 else
1834 return 0;
1835}
1836
1837static void
1838api_trace (pTHX_ SV *coro_sv, int flags)
1839{
1840 struct coro *coro = SvSTATE (coro_sv);
1841
1842 if (coro->flags & CF_RUNNING)
1843 croak ("cannot enable tracing on a running coroutine, caught");
1844
1845 if (flags & CC_TRACE)
1846 {
1847 if (!coro->cctx)
1848 coro->cctx = cctx_new_run ();
1849 else if (!(coro->cctx->flags & CC_TRACE))
1850 croak ("cannot enable tracing on coroutine with custom stack, caught");
1851
1852 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1853 }
1854 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1855 {
1856 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1857
1858 if (coro->flags & CF_RUNNING)
1859 PL_runops = RUNOPS_DEFAULT;
1860 else
1861 coro->slot->runops = RUNOPS_DEFAULT;
1862 }
1863}
1864
1865static void
1866coro_call_on_destroy (pTHX_ struct coro *coro)
1867{
1868 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1869 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1870
1871 if (on_destroyp)
1872 {
1873 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1874
1875 while (AvFILLp (on_destroy) >= 0)
1876 {
1877 dSP; /* don't disturb outer sp */
1878 SV *cb = av_pop (on_destroy);
1879
1880 PUSHMARK (SP);
1881
1882 if (statusp)
1883 {
1884 int i;
1885 AV *status = (AV *)SvRV (*statusp);
1886 EXTEND (SP, AvFILLp (status) + 1);
1887
1888 for (i = 0; i <= AvFILLp (status); ++i)
1889 PUSHs (AvARRAY (status)[i]);
1890 }
1891
1892 PUTBACK;
1893 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1894 }
1895 }
1896}
1897
1898static void
1899slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1900{
1901 int i;
1902 HV *hv = (HV *)SvRV (coro_current);
1903 AV *av = newAV ();
1904
1905 av_extend (av, items - 1);
1906 for (i = 0; i < items; ++i)
1907 av_push (av, SvREFCNT_inc_NN (arg [i]));
1908
1909 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1910
1911 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1912 api_ready (aTHX_ sv_manager);
1913
1914 frame->prepare = prepare_schedule;
1915 frame->check = slf_check_repeat;
1916
1917 /* as a minor optimisation, we could unwind all stacks here */
1918 /* but that puts extra pressure on pp_slf, and is not worth much */
1919 /*coro_unwind_stacks (aTHX);*/
1920}
1921
1922/*****************************************************************************/
1923/* async pool handler */
1924
1925static int
1926slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1927{
1928 HV *hv = (HV *)SvRV (coro_current);
1929 struct coro *coro = (struct coro *)frame->data;
1930
1931 if (!coro->invoke_cb)
1932 return 1; /* loop till we have invoke */
1933 else
1934 {
1935 hv_store (hv, "desc", sizeof ("desc") - 1,
1936 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1937
1938 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1939
1940 {
1941 dSP;
1942 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1943 PUTBACK;
1944 }
1945
1946 SvREFCNT_dec (GvAV (PL_defgv));
1947 GvAV (PL_defgv) = coro->invoke_av;
1948 coro->invoke_av = 0;
1949
1950 return 0;
1951 }
1952}
1953
1954static void
1955slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1956{
1957 HV *hv = (HV *)SvRV (coro_current);
1958 struct coro *coro = SvSTATE_hv ((SV *)hv);
1959
1960 if (expect_true (coro->saved_deffh))
1961 {
1962 /* subsequent iteration */
1963 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1964 coro->saved_deffh = 0;
1965
1966 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1967 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1968 {
1969 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1970 coro->invoke_av = newAV ();
1971
1972 frame->prepare = prepare_nop;
1973 }
1974 else
1975 {
1976 av_clear (GvAV (PL_defgv));
1977 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1978
1979 coro->prio = 0;
1980
1981 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1982 api_trace (aTHX_ coro_current, 0);
1983
1984 frame->prepare = prepare_schedule;
1985 av_push (av_async_pool, SvREFCNT_inc (hv));
1986 }
1987 }
1988 else
1989 {
1990 /* first iteration, simply fall through */
1991 frame->prepare = prepare_nop;
1992 }
1993
1994 frame->check = slf_check_pool_handler;
1995 frame->data = (void *)coro;
1996}
1997
1998/*****************************************************************************/
1999/* rouse callback */
2000
2001#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2002
2003static void
2004coro_rouse_callback (pTHX_ CV *cv)
2005{
2006 dXSARGS;
2007 SV *data = (SV *)S_GENSUB_ARG;
2008
2009 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2010 {
2011 /* first call, set args */
2012 SV *coro = SvRV (data);
2013 AV *av = newAV ();
2014
2015 SvRV_set (data, (SV *)av);
2016
2017 /* better take a full copy of the arguments */
2018 while (items--)
2019 av_store (av, items, newSVsv (ST (items)));
2020
2021 api_ready (aTHX_ coro);
2022 SvREFCNT_dec (coro);
2023 }
2024
2025 XSRETURN_EMPTY;
2026}
2027
2028static int
2029slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2030{
2031 SV *data = (SV *)frame->data;
2032
2033 if (CORO_THROW)
2034 return 0;
2035
2036 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2037 return 1;
2038
2039 /* now push all results on the stack */
2040 {
2041 dSP;
2042 AV *av = (AV *)SvRV (data);
2043 int i;
2044
2045 EXTEND (SP, AvFILLp (av) + 1);
2046 for (i = 0; i <= AvFILLp (av); ++i)
2047 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2048
2049 /* we have stolen the elements, so set length to zero and free */
2050 AvFILLp (av) = -1;
2051 av_undef (av);
2052
2053 PUTBACK;
2054 }
2055
2056 return 0;
2057}
2058
2059static void
2060slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2061{
2062 SV *cb;
2063
2064 if (items)
2065 cb = arg [0];
2066 else
2067 {
2068 struct coro *coro = SvSTATE_current;
2069
2070 if (!coro->rouse_cb)
2071 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2072
2073 cb = sv_2mortal (coro->rouse_cb);
2074 coro->rouse_cb = 0;
2075 }
2076
2077 if (!SvROK (cb)
2078 || SvTYPE (SvRV (cb)) != SVt_PVCV
2079 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2080 croak ("Coro::rouse_wait called with illegal callback argument,");
2081
2082 {
2083 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2084 SV *data = (SV *)S_GENSUB_ARG;
2085
2086 frame->data = (void *)data;
2087 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2088 frame->check = slf_check_rouse_wait;
2089 }
2090}
2091
2092static SV *
2093coro_new_rouse_cb (pTHX)
2094{
2095 HV *hv = (HV *)SvRV (coro_current);
2096 struct coro *coro = SvSTATE_hv (hv);
2097 SV *data = newRV_inc ((SV *)hv);
2098 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2099
2100 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2101 SvREFCNT_dec (data); /* magicext increases the refcount */
2102
2103 SvREFCNT_dec (coro->rouse_cb);
2104 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2105
2106 return cb;
2107}
2108
2109/*****************************************************************************/
2110/* schedule-like-function opcode (SLF) */
2111
2112static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2113static const CV *slf_cv;
2114static SV **slf_argv;
2115static int slf_argc, slf_arga; /* count, allocated */
2116static I32 slf_ax; /* top of stack, for restore */
2117
2118/* this restores the stack in the case we patched the entersub, to */
2119/* recreate the stack frame as perl will on following calls */
2120/* since entersub cleared the stack */
2121static OP *
2122pp_restore (pTHX)
2123{
2124 int i;
2125 SV **SP = PL_stack_base + slf_ax;
2126
2127 PUSHMARK (SP);
2128
2129 EXTEND (SP, slf_argc + 1);
2130
2131 for (i = 0; i < slf_argc; ++i)
2132 PUSHs (sv_2mortal (slf_argv [i]));
2133
2134 PUSHs ((SV *)CvGV (slf_cv));
2135
2136 RETURNOP (slf_restore.op_first);
2137}
2138
2139static void
2140slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2141{
2142 SV **arg = (SV **)slf_frame.data;
2143
2144 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2145}
2146
2147static void
2148slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2149{
2150 if (items != 2)
2151 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2152
2153 frame->prepare = slf_prepare_transfer;
2154 frame->check = slf_check_nop;
2155 frame->data = (void *)arg; /* let's hope it will stay valid */
2156}
2157
2158static void
2159slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2160{
2161 frame->prepare = prepare_schedule;
2162 frame->check = slf_check_nop;
2163}
2164
2165static void
2166slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2167{
2168 struct coro *next = (struct coro *)slf_frame.data;
2169
2170 SvREFCNT_inc_NN (next->hv);
2171 prepare_schedule_to (aTHX_ ta, next);
2172}
2173
2174static void
2175slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2176{
2177 if (!items)
2178 croak ("Coro::schedule_to expects a coroutine argument, caught");
2179
2180 frame->data = (void *)SvSTATE (arg [0]);
2181 frame->prepare = slf_prepare_schedule_to;
2182 frame->check = slf_check_nop;
2183}
2184
2185static void
2186slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2187{
2188 api_ready (aTHX_ SvRV (coro_current));
2189
2190 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2191}
2192
2193static void
2194slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2195{
2196 frame->prepare = prepare_cede;
2197 frame->check = slf_check_nop;
2198}
2199
2200static void
2201slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2202{
2203 frame->prepare = prepare_cede_notself;
2204 frame->check = slf_check_nop;
2205}
2206
2207/*
2208 * these not obviously related functions are all rolled into one
2209 * function to increase chances that they all will call transfer with the same
2210 * stack offset
2211 * SLF stands for "schedule-like-function".
2212 */
2213static OP *
2214pp_slf (pTHX)
2215{
2216 I32 checkmark; /* mark SP to see how many elements check has pushed */
2217
2218 /* set up the slf frame, unless it has already been set-up */
2219 /* the latter happens when a new coro has been started */
2220 /* or when a new cctx was attached to an existing coroutine */
2221 if (expect_true (!slf_frame.prepare))
2222 {
2223 /* first iteration */
2224 dSP;
2225 SV **arg = PL_stack_base + TOPMARK + 1;
2226 int items = SP - arg; /* args without function object */
2227 SV *gv = *sp;
2228
2229 /* do a quick consistency check on the "function" object, and if it isn't */
2230 /* for us, divert to the real entersub */
2231 if (SvTYPE (gv) != SVt_PVGV
2232 || !GvCV (gv)
2233 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2234 return PL_ppaddr[OP_ENTERSUB](aTHX);
2235
2236 if (!(PL_op->op_flags & OPf_STACKED))
2237 {
2238 /* ampersand-form of call, use @_ instead of stack */
2239 AV *av = GvAV (PL_defgv);
2240 arg = AvARRAY (av);
2241 items = AvFILLp (av) + 1;
2242 }
2243
2244 /* now call the init function, which needs to set up slf_frame */
2245 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2246 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2247
2248 /* pop args */
2249 SP = PL_stack_base + POPMARK;
2250
2251 PUTBACK;
2252 }
2253
2254 /* now that we have a slf_frame, interpret it! */
2255 /* we use a callback system not to make the code needlessly */
2256 /* complicated, but so we can run multiple perl coros from one cctx */
2257
2258 do
2259 {
2260 struct coro_transfer_args ta;
2261
2262 slf_frame.prepare (aTHX_ &ta);
2263 TRANSFER (ta, 0);
2264
2265 checkmark = PL_stack_sp - PL_stack_base;
2266 }
2267 while (slf_frame.check (aTHX_ &slf_frame));
2268
2269 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2270
2271 /* exception handling */
2272 if (expect_false (CORO_THROW))
2273 {
2274 SV *exception = sv_2mortal (CORO_THROW);
2275
2276 CORO_THROW = 0;
2277 sv_setsv (ERRSV, exception);
2278 croak (0);
2279 }
2280
2281 /* return value handling - mostly like entersub */
2282 /* make sure we put something on the stack in scalar context */
2283 if (GIMME_V == G_SCALAR)
2284 {
2285 dSP;
2286 SV **bot = PL_stack_base + checkmark;
2287
2288 if (sp == bot) /* too few, push undef */
2289 bot [1] = &PL_sv_undef;
2290 else if (sp != bot + 1) /* too many, take last one */
2291 bot [1] = *sp;
2292
2293 SP = bot + 1;
2294
2295 PUTBACK;
2296 }
2297
2298 return NORMAL;
2299}
2300
2301static void
2302api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2303{
2304 int i;
2305 SV **arg = PL_stack_base + ax;
2306 int items = PL_stack_sp - arg + 1;
2307
2308 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2309
2310 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2311 && PL_op->op_ppaddr != pp_slf)
2312 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2313
2314 CvFLAGS (cv) |= CVf_SLF;
2315 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2316 slf_cv = cv;
2317
2318 /* we patch the op, and then re-run the whole call */
2319 /* we have to put the same argument on the stack for this to work */
2320 /* and this will be done by pp_restore */
2321 slf_restore.op_next = (OP *)&slf_restore;
2322 slf_restore.op_type = OP_CUSTOM;
2323 slf_restore.op_ppaddr = pp_restore;
2324 slf_restore.op_first = PL_op;
2325
2326 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2327
2328 if (PL_op->op_flags & OPf_STACKED)
2329 {
2330 if (items > slf_arga)
2331 {
2332 slf_arga = items;
2333 free (slf_argv);
2334 slf_argv = malloc (slf_arga * sizeof (SV *));
2335 }
2336
2337 slf_argc = items;
2338
2339 for (i = 0; i < items; ++i)
2340 slf_argv [i] = SvREFCNT_inc (arg [i]);
2341 }
2342 else
2343 slf_argc = 0;
2344
2345 PL_op->op_ppaddr = pp_slf;
2346 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2347
2348 PL_op = (OP *)&slf_restore;
2349}
2350
2351/*****************************************************************************/
2352/* dynamic wind */
2353
2354static void
2355on_enterleave_call (pTHX_ SV *cb)
2356{
2357 dSP;
2358
2359 PUSHSTACK;
2360
2361 PUSHMARK (SP);
2362 PUTBACK;
2363 call_sv (cb, G_VOID | G_DISCARD);
2364 SPAGAIN;
2365
2366 POPSTACK;
2367}
2368
2369static SV *
2370coro_avp_pop_and_free (pTHX_ AV **avp)
2371{
2372 AV *av = *avp;
2373 SV *res = av_pop (av);
2374
2375 if (AvFILLp (av) < 0)
2376 {
2377 *avp = 0;
2378 SvREFCNT_dec (av);
2379 }
2380
2381 return res;
2382}
2383
2384static void
2385coro_pop_on_enter (pTHX_ void *coro)
2386{
2387 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2388 SvREFCNT_dec (cb);
2389}
2390
2391static void
2392coro_pop_on_leave (pTHX_ void *coro)
2393{
2394 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2395 on_enterleave_call (aTHX_ sv_2mortal (cb));
2396}
2397
2398/*****************************************************************************/
2399/* PerlIO::cede */
2400
2401typedef struct
2402{
2403 PerlIOBuf base;
2404 NV next, every;
2405} PerlIOCede;
2406
2407static IV
2408PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2409{
2410 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2411
2412 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2413 self->next = nvtime () + self->every;
2414
2415 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2416}
2417
2418static SV *
2419PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2420{
2421 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2422
2423 return newSVnv (self->every);
2424}
2425
2426static IV
2427PerlIOCede_flush (pTHX_ PerlIO *f)
2428{
2429 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2430 double now = nvtime ();
2431
2432 if (now >= self->next)
2433 {
2434 api_cede (aTHX);
2435 self->next = now + self->every;
2436 }
2437
2438 return PerlIOBuf_flush (aTHX_ f);
2439}
2440
2441static PerlIO_funcs PerlIO_cede =
2442{
2443 sizeof(PerlIO_funcs),
2444 "cede",
2445 sizeof(PerlIOCede),
2446 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2447 PerlIOCede_pushed,
2448 PerlIOBuf_popped,
2449 PerlIOBuf_open,
2450 PerlIOBase_binmode,
2451 PerlIOCede_getarg,
2452 PerlIOBase_fileno,
2453 PerlIOBuf_dup,
2454 PerlIOBuf_read,
2455 PerlIOBuf_unread,
2456 PerlIOBuf_write,
2457 PerlIOBuf_seek,
2458 PerlIOBuf_tell,
2459 PerlIOBuf_close,
2460 PerlIOCede_flush,
2461 PerlIOBuf_fill,
2462 PerlIOBase_eof,
2463 PerlIOBase_error,
2464 PerlIOBase_clearerr,
2465 PerlIOBase_setlinebuf,
2466 PerlIOBuf_get_base,
2467 PerlIOBuf_bufsiz,
2468 PerlIOBuf_get_ptr,
2469 PerlIOBuf_get_cnt,
2470 PerlIOBuf_set_ptrcnt,
2471};
2472
2473/*****************************************************************************/
2474/* Coro::Semaphore & Coro::Signal */
2475
2476static SV *
2477coro_waitarray_new (pTHX_ int count)
2478{
2479 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2480 AV *av = newAV ();
2481 SV **ary;
2482
2483 /* unfortunately, building manually saves memory */
2484 Newx (ary, 2, SV *);
2485 AvALLOC (av) = ary;
2486#if PERL_VERSION_ATLEAST (5,10,0)
2487 AvARRAY (av) = ary;
2488#else
2489 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2490 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2491 SvPVX ((SV *)av) = (char *)ary;
2492#endif
2493 AvMAX (av) = 1;
2494 AvFILLp (av) = 0;
2495 ary [0] = newSViv (count);
2496
2497 return newRV_noinc ((SV *)av);
2498}
2499
2500/* semaphore */
2501
2502static void
2503coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2504{
2505 SV *count_sv = AvARRAY (av)[0];
2506 IV count = SvIVX (count_sv);
2507
2508 count += adjust;
2509 SvIVX (count_sv) = count;
2510
2511 /* now wake up as many waiters as are expected to lock */
2512 while (count > 0 && AvFILLp (av) > 0)
2513 {
2514 SV *cb;
2515
2516 /* swap first two elements so we can shift a waiter */
2517 AvARRAY (av)[0] = AvARRAY (av)[1];
2518 AvARRAY (av)[1] = count_sv;
2519 cb = av_shift (av);
2520
2521 if (SvOBJECT (cb))
2522 {
2523 api_ready (aTHX_ cb);
2524 --count;
2525 }
2526 else if (SvTYPE (cb) == SVt_PVCV)
1056 { 2527 {
1057 dSP; 2528 dSP;
1058 UNLOCK;
1059
1060 ENTER;
1061 SAVETMPS;
1062
1063 PUSHMARK (SP); 2529 PUSHMARK (SP);
2530 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1064 PUTBACK; 2531 PUTBACK;
1065 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2532 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1066
1067 FREETMPS;
1068 LEAVE;
1069 continue;
1070 } 2533 }
1071 2534
1072 ta->next = SvSTATE (next_sv); 2535 SvREFCNT_dec (cb);
2536 }
2537}
1073 2538
1074 /* cannot transfer to destroyed coros, skip and look for next */ 2539static void
1075 if (ta->next->flags & CF_DESTROYED) 2540coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2541{
2542 /* call $sem->adjust (0) to possibly wake up some other waiters */
2543 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2544}
2545
2546static int
2547slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2548{
2549 AV *av = (AV *)frame->data;
2550 SV *count_sv = AvARRAY (av)[0];
2551
2552 /* if we are about to throw, don't actually acquire the lock, just throw */
2553 if (CORO_THROW)
2554 return 0;
2555 else if (SvIVX (count_sv) > 0)
2556 {
2557 SvSTATE_current->on_destroy = 0;
2558
2559 if (acquire)
2560 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2561 else
2562 coro_semaphore_adjust (aTHX_ av, 0);
2563
2564 return 0;
2565 }
2566 else
2567 {
2568 int i;
2569 /* if we were woken up but can't down, we look through the whole */
2570 /* waiters list and only add us if we aren't in there already */
2571 /* this avoids some degenerate memory usage cases */
2572
2573 for (i = 1; i <= AvFILLp (av); ++i)
2574 if (AvARRAY (av)[i] == SvRV (coro_current))
2575 return 1;
2576
2577 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2578 return 1;
2579 }
2580}
2581
2582static int
2583slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2584{
2585 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2586}
2587
2588static int
2589slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2590{
2591 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2592}
2593
2594static void
2595slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2596{
2597 AV *av = (AV *)SvRV (arg [0]);
2598
2599 if (SvIVX (AvARRAY (av)[0]) > 0)
2600 {
2601 frame->data = (void *)av;
2602 frame->prepare = prepare_nop;
2603 }
2604 else
2605 {
2606 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2607
2608 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2609 frame->prepare = prepare_schedule;
2610
2611 /* to avoid race conditions when a woken-up coro gets terminated */
2612 /* we arrange for a temporary on_destroy that calls adjust (0) */
2613 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2614 }
2615}
2616
2617static void
2618slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2619{
2620 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2621 frame->check = slf_check_semaphore_down;
2622}
2623
2624static void
2625slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2626{
2627 if (items >= 2)
2628 {
2629 /* callback form */
2630 AV *av = (AV *)SvRV (arg [0]);
2631 SV *cb_cv = s_get_cv_croak (arg [1]);
2632
2633 av_push (av, SvREFCNT_inc_NN (cb_cv));
2634
2635 if (SvIVX (AvARRAY (av)[0]) > 0)
2636 coro_semaphore_adjust (aTHX_ av, 0);
2637
2638 frame->prepare = prepare_nop;
2639 frame->check = slf_check_nop;
2640 }
2641 else
2642 {
2643 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2644 frame->check = slf_check_semaphore_wait;
2645 }
2646}
2647
2648/* signal */
2649
2650static void
2651coro_signal_wake (pTHX_ AV *av, int count)
2652{
2653 SvIVX (AvARRAY (av)[0]) = 0;
2654
2655 /* now signal count waiters */
2656 while (count > 0 && AvFILLp (av) > 0)
2657 {
2658 SV *cb;
2659
2660 /* swap first two elements so we can shift a waiter */
2661 cb = AvARRAY (av)[0];
2662 AvARRAY (av)[0] = AvARRAY (av)[1];
2663 AvARRAY (av)[1] = cb;
2664
2665 cb = av_shift (av);
2666
2667 if (SvTYPE (cb) == SVt_PVCV)
1076 { 2668 {
2669 dSP;
2670 PUSHMARK (SP);
2671 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1077 UNLOCK; 2672 PUTBACK;
1078 SvREFCNT_dec (next_sv); 2673 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1079 /* coro_nready is already taken care of by destroy */
1080 continue;
1081 } 2674 }
2675 else
2676 {
2677 api_ready (aTHX_ cb);
2678 sv_setiv (cb, 0); /* signal waiter */
2679 }
1082 2680
1083 --coro_nready; 2681 SvREFCNT_dec (cb);
1084 UNLOCK;
1085 break;
1086 }
1087 2682
1088 /* free this only after the transfer */ 2683 --count;
1089 prev_sv = SvRV (coro_current); 2684 }
1090 SvRV_set (coro_current, next_sv);
1091 ta->prev = SvSTATE (prev_sv);
1092
1093 assert (ta->next->flags & CF_READY);
1094 ta->next->flags &= ~CF_READY;
1095
1096 LOCK;
1097 free_coro_mortal (aTHX);
1098 coro_mortal = prev_sv;
1099 UNLOCK;
1100}
1101
1102static void
1103prepare_cede (pTHX_ struct transfer_args *ta)
1104{
1105 api_ready (coro_current);
1106 prepare_schedule (aTHX_ ta);
1107} 2685}
1108 2686
1109static int 2687static int
1110prepare_cede_notself (pTHX_ struct transfer_args *ta) 2688slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1111{ 2689{
1112 if (coro_nready) 2690 /* if we are about to throw, also stop waiting */
2691 return SvROK ((SV *)frame->data) && !CORO_THROW;
2692}
2693
2694static void
2695slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2696{
2697 AV *av = (AV *)SvRV (arg [0]);
2698
2699 if (items >= 2)
2700 {
2701 SV *cb_cv = s_get_cv_croak (arg [1]);
2702 av_push (av, SvREFCNT_inc_NN (cb_cv));
2703
2704 if (SvIVX (AvARRAY (av)[0]))
2705 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2706
2707 frame->prepare = prepare_nop;
2708 frame->check = slf_check_nop;
1113 { 2709 }
1114 SV *prev = SvRV (coro_current); 2710 else if (SvIVX (AvARRAY (av)[0]))
1115 prepare_schedule (aTHX_ ta); 2711 {
1116 api_ready (prev); 2712 SvIVX (AvARRAY (av)[0]) = 0;
1117 return 1; 2713 frame->prepare = prepare_nop;
2714 frame->check = slf_check_nop;
1118 } 2715 }
1119 else 2716 else
2717 {
2718 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2719
2720 av_push (av, waiter);
2721
2722 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2723 frame->prepare = prepare_schedule;
2724 frame->check = slf_check_signal_wait;
2725 }
2726}
2727
2728/*****************************************************************************/
2729/* Coro::AIO */
2730
2731#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2732
2733/* helper storage struct */
2734struct io_state
2735{
2736 int errorno;
2737 I32 laststype; /* U16 in 5.10.0 */
2738 int laststatval;
2739 Stat_t statcache;
2740};
2741
2742static void
2743coro_aio_callback (pTHX_ CV *cv)
2744{
2745 dXSARGS;
2746 AV *state = (AV *)S_GENSUB_ARG;
2747 SV *coro = av_pop (state);
2748 SV *data_sv = newSV (sizeof (struct io_state));
2749
2750 av_extend (state, items - 1);
2751
2752 sv_upgrade (data_sv, SVt_PV);
2753 SvCUR_set (data_sv, sizeof (struct io_state));
2754 SvPOK_only (data_sv);
2755
2756 {
2757 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2758
2759 data->errorno = errno;
2760 data->laststype = PL_laststype;
2761 data->laststatval = PL_laststatval;
2762 data->statcache = PL_statcache;
2763 }
2764
2765 /* now build the result vector out of all the parameters and the data_sv */
2766 {
2767 int i;
2768
2769 for (i = 0; i < items; ++i)
2770 av_push (state, SvREFCNT_inc_NN (ST (i)));
2771 }
2772
2773 av_push (state, data_sv);
2774
2775 api_ready (aTHX_ coro);
2776 SvREFCNT_dec (coro);
2777 SvREFCNT_dec ((AV *)state);
2778}
2779
2780static int
2781slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2782{
2783 AV *state = (AV *)frame->data;
2784
2785 /* if we are about to throw, return early */
2786 /* this does not cancel the aio request, but at least */
2787 /* it quickly returns */
2788 if (CORO_THROW)
1120 return 0; 2789 return 0;
1121}
1122 2790
1123static void 2791 /* one element that is an RV? repeat! */
1124api_schedule (void) 2792 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1125{
1126 dTHX;
1127 struct transfer_args ta;
1128
1129 prepare_schedule (aTHX_ &ta);
1130 TRANSFER (ta);
1131}
1132
1133static int
1134api_cede (void)
1135{
1136 dTHX;
1137 struct transfer_args ta;
1138
1139 prepare_cede (aTHX_ &ta);
1140
1141 if (ta.prev != ta.next)
1142 {
1143 TRANSFER (ta);
1144 return 1; 2793 return 1;
2794
2795 /* restore status */
2796 {
2797 SV *data_sv = av_pop (state);
2798 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2799
2800 errno = data->errorno;
2801 PL_laststype = data->laststype;
2802 PL_laststatval = data->laststatval;
2803 PL_statcache = data->statcache;
2804
2805 SvREFCNT_dec (data_sv);
1145 } 2806 }
1146 else 2807
2808 /* push result values */
2809 {
2810 dSP;
2811 int i;
2812
2813 EXTEND (SP, AvFILLp (state) + 1);
2814 for (i = 0; i <= AvFILLp (state); ++i)
2815 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2816
2817 PUTBACK;
2818 }
2819
1147 return 0; 2820 return 0;
1148} 2821}
1149 2822
1150static int 2823static void
1151api_cede_notself (void) 2824slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1152{ 2825{
1153 dTHX; 2826 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1154 struct transfer_args ta; 2827 SV *coro_hv = SvRV (coro_current);
2828 struct coro *coro = SvSTATE_hv (coro_hv);
1155 2829
1156 if (prepare_cede_notself (aTHX_ &ta)) 2830 /* put our coroutine id on the state arg */
1157 { 2831 av_push (state, SvREFCNT_inc_NN (coro_hv));
1158 TRANSFER (ta); 2832
1159 return 1; 2833 /* first see whether we have a non-zero priority and set it as AIO prio */
2834 if (coro->prio)
1160 } 2835 {
1161 else 2836 dSP;
1162 return 0;
1163}
1164 2837
2838 static SV *prio_cv;
2839 static SV *prio_sv;
2840
2841 if (expect_false (!prio_cv))
2842 {
2843 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2844 prio_sv = newSViv (0);
2845 }
2846
2847 PUSHMARK (SP);
2848 sv_setiv (prio_sv, coro->prio);
2849 XPUSHs (prio_sv);
2850
2851 PUTBACK;
2852 call_sv (prio_cv, G_VOID | G_DISCARD);
2853 }
2854
2855 /* now call the original request */
2856 {
2857 dSP;
2858 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2859 int i;
2860
2861 PUSHMARK (SP);
2862
2863 /* first push all args to the stack */
2864 EXTEND (SP, items + 1);
2865
2866 for (i = 0; i < items; ++i)
2867 PUSHs (arg [i]);
2868
2869 /* now push the callback closure */
2870 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2871
2872 /* now call the AIO function - we assume our request is uncancelable */
2873 PUTBACK;
2874 call_sv ((SV *)req, G_VOID | G_DISCARD);
2875 }
2876
2877 /* now that the requets is going, we loop toll we have a result */
2878 frame->data = (void *)state;
2879 frame->prepare = prepare_schedule;
2880 frame->check = slf_check_aio_req;
2881}
2882
2883static void
2884coro_aio_req_xs (pTHX_ CV *cv)
2885{
2886 dXSARGS;
2887
2888 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2889
2890 XSRETURN_EMPTY;
2891}
2892
2893/*****************************************************************************/
2894
2895#if CORO_CLONE
2896# include "clone.c"
2897#endif
2898
1165MODULE = Coro::State PACKAGE = Coro::State 2899MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1166 2900
1167PROTOTYPES: DISABLE 2901PROTOTYPES: DISABLE
1168 2902
1169BOOT: 2903BOOT:
1170{ 2904{
1171#ifdef USE_ITHREADS 2905#ifdef USE_ITHREADS
1172 MUTEX_INIT (&coro_mutex); 2906# if CORO_PTHREAD
2907 coro_thx = PERL_GET_CONTEXT;
2908# endif
1173#endif 2909#endif
1174 BOOT_PAGESIZE; 2910 BOOT_PAGESIZE;
1175 2911
2912 cctx_current = cctx_new_empty ();
2913
2914 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2915 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2916
2917 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2918 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2919 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2920
2921 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2922 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2923 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2924
1176 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2925 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1177 2926
1178 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2927 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1179 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2928 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1180 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1181 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1182 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1183 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 2929 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1184 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2930 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1185 2931
1186 main_mainstack = PL_mainstack; 2932 main_mainstack = PL_mainstack;
1187 main_top_env = PL_top_env; 2933 main_top_env = PL_top_env;
1188 2934
1189 while (main_top_env->je_prev) 2935 while (main_top_env->je_prev)
1190 main_top_env = main_top_env->je_prev; 2936 main_top_env = main_top_env->je_prev;
1191 2937
2938 {
2939 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2940
2941 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2942 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2943
2944 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2945 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2946 }
2947
1192 coroapi.ver = CORO_API_VERSION; 2948 coroapi.ver = CORO_API_VERSION;
2949 coroapi.rev = CORO_API_REVISION;
2950
1193 coroapi.transfer = api_transfer; 2951 coroapi.transfer = api_transfer;
1194 2952
2953 coroapi.sv_state = SvSTATE_;
2954 coroapi.execute_slf = api_execute_slf;
2955 coroapi.prepare_nop = prepare_nop;
2956 coroapi.prepare_schedule = prepare_schedule;
2957 coroapi.prepare_cede = prepare_cede;
2958 coroapi.prepare_cede_notself = prepare_cede_notself;
2959
2960 {
2961 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2962
2963 if (!svp) croak ("Time::HiRes is required");
2964 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2965
2966 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2967
2968 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2969 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
2970 }
2971
1195 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2972 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1196} 2973}
1197 2974
1198SV * 2975SV *
1199new (char *klass, ...) 2976new (char *klass, ...)
2977 ALIAS:
2978 Coro::new = 1
1200 CODE: 2979 CODE:
1201{ 2980{
1202 struct coro *coro; 2981 struct coro *coro;
2982 MAGIC *mg;
1203 HV *hv; 2983 HV *hv;
2984 SV *cb;
1204 int i; 2985 int i;
1205 2986
2987 if (items > 1)
2988 {
2989 cb = s_get_cv_croak (ST (1));
2990
2991 if (!ix)
2992 {
2993 if (CvISXSUB (cb))
2994 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2995
2996 if (!CvROOT (cb))
2997 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2998 }
2999 }
3000
1206 Newz (0, coro, 1, struct coro); 3001 Newz (0, coro, 1, struct coro);
1207 coro->args = newAV (); 3002 coro->args = newAV ();
1208 coro->save = CORO_SAVE_DEF;
1209 coro->flags = CF_NEW; 3003 coro->flags = CF_NEW;
1210 3004
3005 if (coro_first) coro_first->prev = coro;
3006 coro->next = coro_first;
3007 coro_first = coro;
3008
1211 hv = newHV (); 3009 coro->hv = hv = newHV ();
1212 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3010 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3011 mg->mg_flags |= MGf_DUP;
1213 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3012 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1214 3013
3014 if (items > 1)
3015 {
3016 av_extend (coro->args, items - 1 + ix - 1);
3017
3018 if (ix)
3019 {
3020 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3021 cb = (SV *)cv_coro_run;
3022 }
3023
3024 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3025
1215 for (i = 1; i < items; i++) 3026 for (i = 2; i < items; i++)
1216 av_push (coro->args, newSVsv (ST (i))); 3027 av_push (coro->args, newSVsv (ST (i)));
3028 }
1217} 3029}
1218 OUTPUT: 3030 OUTPUT:
1219 RETVAL 3031 RETVAL
1220 3032
1221int 3033void
1222save (SV *coro, int new_save = -1) 3034transfer (...)
3035 PROTOTYPE: $$
1223 CODE: 3036 CODE:
1224 RETVAL = api_save (coro, new_save); 3037 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1225 OUTPUT:
1226 RETVAL
1227
1228int
1229save_also (SV *coro_sv, int save_also)
1230 CODE:
1231{
1232 struct coro *coro = SvSTATE (coro_sv);
1233 RETVAL = coro->save;
1234 coro->save |= save_also;
1235}
1236 OUTPUT:
1237 RETVAL
1238
1239void
1240_set_stacklevel (...)
1241 ALIAS:
1242 Coro::State::transfer = 1
1243 Coro::schedule = 2
1244 Coro::cede = 3
1245 Coro::cede_notself = 4
1246 CODE:
1247{
1248 struct transfer_args ta;
1249
1250 switch (ix)
1251 {
1252 case 0:
1253 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1254 ta.next = 0;
1255 break;
1256
1257 case 1:
1258 if (items != 2)
1259 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1260
1261 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1262 break;
1263
1264 case 2:
1265 prepare_schedule (aTHX_ &ta);
1266 break;
1267
1268 case 3:
1269 prepare_cede (aTHX_ &ta);
1270 break;
1271
1272 case 4:
1273 if (!prepare_cede_notself (aTHX_ &ta))
1274 XSRETURN_EMPTY;
1275
1276 break;
1277 }
1278
1279 BARRIER;
1280 TRANSFER (ta);
1281
1282 if (GIMME_V != G_VOID && ta.next != ta.prev)
1283 XSRETURN_YES;
1284}
1285 3038
1286bool 3039bool
1287_destroy (SV *coro_sv) 3040_destroy (SV *coro_sv)
1288 CODE: 3041 CODE:
1289 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3042 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1290 OUTPUT: 3043 OUTPUT:
1291 RETVAL 3044 RETVAL
1292 3045
1293void 3046void
1294_exit (code) 3047_exit (int code)
1295 int code
1296 PROTOTYPE: $ 3048 PROTOTYPE: $
1297 CODE: 3049 CODE:
1298 _exit (code); 3050 _exit (code);
1299 3051
3052SV *
3053clone (Coro::State coro)
3054 CODE:
3055{
3056#if CORO_CLONE
3057 struct coro *ncoro = coro_clone (aTHX_ coro);
3058 MAGIC *mg;
3059 /* TODO: too much duplication */
3060 ncoro->hv = newHV ();
3061 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3062 mg->mg_flags |= MGf_DUP;
3063 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3064#else
3065 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3066#endif
3067}
3068 OUTPUT:
3069 RETVAL
3070
1300int 3071int
1301cctx_stacksize (int new_stacksize = 0) 3072cctx_stacksize (int new_stacksize = 0)
3073 PROTOTYPE: ;$
1302 CODE: 3074 CODE:
1303 RETVAL = coro_stacksize; 3075 RETVAL = cctx_stacksize;
1304 if (new_stacksize) 3076 if (new_stacksize)
3077 {
1305 coro_stacksize = new_stacksize; 3078 cctx_stacksize = new_stacksize;
3079 ++cctx_gen;
3080 }
1306 OUTPUT: 3081 OUTPUT:
1307 RETVAL 3082 RETVAL
1308 3083
1309int 3084int
3085cctx_max_idle (int max_idle = 0)
3086 PROTOTYPE: ;$
3087 CODE:
3088 RETVAL = cctx_max_idle;
3089 if (max_idle > 1)
3090 cctx_max_idle = max_idle;
3091 OUTPUT:
3092 RETVAL
3093
3094int
1310cctx_count () 3095cctx_count ()
3096 PROTOTYPE:
1311 CODE: 3097 CODE:
1312 RETVAL = cctx_count; 3098 RETVAL = cctx_count;
1313 OUTPUT: 3099 OUTPUT:
1314 RETVAL 3100 RETVAL
1315 3101
1316int 3102int
1317cctx_idle () 3103cctx_idle ()
3104 PROTOTYPE:
1318 CODE: 3105 CODE:
1319 RETVAL = cctx_idle; 3106 RETVAL = cctx_idle;
1320 OUTPUT: 3107 OUTPUT:
1321 RETVAL 3108 RETVAL
1322 3109
3110void
3111list ()
3112 PROTOTYPE:
3113 PPCODE:
3114{
3115 struct coro *coro;
3116 for (coro = coro_first; coro; coro = coro->next)
3117 if (coro->hv)
3118 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3119}
3120
3121void
3122call (Coro::State coro, SV *coderef)
3123 ALIAS:
3124 eval = 1
3125 CODE:
3126{
3127 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3128 {
3129 struct coro *current = SvSTATE_current;
3130
3131 if (current != coro)
3132 {
3133 PUTBACK;
3134 save_perl (aTHX_ current);
3135 load_perl (aTHX_ coro);
3136 SPAGAIN;
3137 }
3138
3139 PUSHSTACK;
3140
3141 PUSHMARK (SP);
3142 PUTBACK;
3143
3144 if (ix)
3145 eval_sv (coderef, 0);
3146 else
3147 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3148
3149 POPSTACK;
3150 SPAGAIN;
3151
3152 if (current != coro)
3153 {
3154 PUTBACK;
3155 save_perl (aTHX_ coro);
3156 load_perl (aTHX_ current);
3157 SPAGAIN;
3158 }
3159 }
3160}
3161
3162SV *
3163is_ready (Coro::State coro)
3164 PROTOTYPE: $
3165 ALIAS:
3166 is_ready = CF_READY
3167 is_running = CF_RUNNING
3168 is_new = CF_NEW
3169 is_destroyed = CF_DESTROYED
3170 is_suspended = CF_SUSPENDED
3171 CODE:
3172 RETVAL = boolSV (coro->flags & ix);
3173 OUTPUT:
3174 RETVAL
3175
3176void
3177throw (Coro::State self, SV *throw = &PL_sv_undef)
3178 PROTOTYPE: $;$
3179 CODE:
3180{
3181 struct coro *current = SvSTATE_current;
3182 SV **throwp = self == current ? &CORO_THROW : &self->except;
3183 SvREFCNT_dec (*throwp);
3184 SvGETMAGIC (throw);
3185 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3186}
3187
3188void
3189api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3190 PROTOTYPE: $;$
3191 C_ARGS: aTHX_ coro, flags
3192
3193SV *
3194has_cctx (Coro::State coro)
3195 PROTOTYPE: $
3196 CODE:
3197 /* maybe manage the running flag differently */
3198 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3199 OUTPUT:
3200 RETVAL
3201
3202int
3203is_traced (Coro::State coro)
3204 PROTOTYPE: $
3205 CODE:
3206 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3207 OUTPUT:
3208 RETVAL
3209
3210UV
3211rss (Coro::State coro)
3212 PROTOTYPE: $
3213 ALIAS:
3214 usecount = 1
3215 CODE:
3216 switch (ix)
3217 {
3218 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3219 case 1: RETVAL = coro->usecount; break;
3220 }
3221 OUTPUT:
3222 RETVAL
3223
3224void
3225force_cctx ()
3226 PROTOTYPE:
3227 CODE:
3228 cctx_current->idle_sp = 0;
3229
3230void
3231swap_defsv (Coro::State self)
3232 PROTOTYPE: $
3233 ALIAS:
3234 swap_defav = 1
3235 CODE:
3236 if (!self->slot)
3237 croak ("cannot swap state with coroutine that has no saved state,");
3238 else
3239 {
3240 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3241 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3242
3243 SV *tmp = *src; *src = *dst; *dst = tmp;
3244 }
3245
3246void
3247cancel (Coro::State self)
3248 CODE:
3249 coro_state_destroy (aTHX_ self);
3250 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3251
3252
3253SV *
3254enable_times (int enabled = enable_times)
3255 CODE:
3256{
3257 RETVAL = boolSV (enable_times);
3258
3259 if (enabled != enable_times)
3260 {
3261 enable_times = enabled;
3262
3263 coro_times_update ();
3264 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3265 }
3266}
3267 OUTPUT:
3268 RETVAL
3269
3270void
3271times (Coro::State self)
3272 PPCODE:
3273{
3274 struct coro *current = SvSTATE (coro_current);
3275
3276 if (expect_false (current == self))
3277 {
3278 coro_times_update ();
3279 coro_times_add (SvSTATE (coro_current));
3280 }
3281
3282 EXTEND (SP, 2);
3283 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3284 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3285
3286 if (expect_false (current == self))
3287 coro_times_sub (SvSTATE (coro_current));
3288}
3289
1323MODULE = Coro::State PACKAGE = Coro 3290MODULE = Coro::State PACKAGE = Coro
1324 3291
1325BOOT: 3292BOOT:
1326{ 3293{
1327 int i; 3294 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3295 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3296 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3297 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3298 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3299 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3300 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3301 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3302 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1328 3303
3304 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3305 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3306 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3307 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3308
1329 coro_stash = gv_stashpv ("Coro", TRUE); 3309 coro_stash = gv_stashpv ("Coro", TRUE);
1330 3310
1331 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3311 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1332 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3312 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1333 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3313 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1334 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3314 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1335 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3315 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1336 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3316 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1337
1338 coro_current = get_sv ("Coro::current", FALSE);
1339 SvREADONLY_on (coro_current);
1340
1341 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1342 coro_ready[i] = newAV ();
1343 3317
1344 { 3318 {
1345 SV *sv = perl_get_sv("Coro::API", 1); 3319 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1346 3320
1347 coroapi.schedule = api_schedule; 3321 coroapi.schedule = api_schedule;
1348 coroapi.save = api_save; 3322 coroapi.schedule_to = api_schedule_to;
1349 coroapi.cede = api_cede; 3323 coroapi.cede = api_cede;
1350 coroapi.cede_notself = api_cede_notself; 3324 coroapi.cede_notself = api_cede_notself;
1351 coroapi.ready = api_ready; 3325 coroapi.ready = api_ready;
1352 coroapi.is_ready = api_is_ready; 3326 coroapi.is_ready = api_is_ready;
1353 coroapi.nready = &coro_nready; 3327 coroapi.nready = coro_nready;
1354 coroapi.current = coro_current; 3328 coroapi.current = coro_current;
1355 3329
1356 GCoroAPI = &coroapi; 3330 /*GCoroAPI = &coroapi;*/
1357 sv_setiv (sv, (IV)&coroapi); 3331 sv_setiv (sv, (IV)&coroapi);
1358 SvREADONLY_on (sv); 3332 SvREADONLY_on (sv);
1359 } 3333 }
1360} 3334}
3335
3336void
3337terminate (...)
3338 CODE:
3339 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3340
3341void
3342schedule (...)
3343 CODE:
3344 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3345
3346void
3347schedule_to (...)
3348 CODE:
3349 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3350
3351void
3352cede_to (...)
3353 CODE:
3354 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3355
3356void
3357cede (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_cede);
3360
3361void
3362cede_notself (...)
3363 CODE:
3364 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1361 3365
1362void 3366void
1363_set_current (SV *current) 3367_set_current (SV *current)
1364 PROTOTYPE: $ 3368 PROTOTYPE: $
1365 CODE: 3369 CODE:
1366 SvREFCNT_dec (SvRV (coro_current)); 3370 SvREFCNT_dec (SvRV (coro_current));
1367 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3371 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3372
3373void
3374_set_readyhook (SV *hook)
3375 PROTOTYPE: $
3376 CODE:
3377 SvREFCNT_dec (coro_readyhook);
3378 SvGETMAGIC (hook);
3379 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1368 3380
1369int 3381int
1370prio (Coro::State coro, int newprio = 0) 3382prio (Coro::State coro, int newprio = 0)
3383 PROTOTYPE: $;$
1371 ALIAS: 3384 ALIAS:
1372 nice = 1 3385 nice = 1
1373 CODE: 3386 CODE:
1374{ 3387{
1375 RETVAL = coro->prio; 3388 RETVAL = coro->prio;
… …
1377 if (items > 1) 3390 if (items > 1)
1378 { 3391 {
1379 if (ix) 3392 if (ix)
1380 newprio = coro->prio - newprio; 3393 newprio = coro->prio - newprio;
1381 3394
1382 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3395 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1383 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3396 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1384 3397
1385 coro->prio = newprio; 3398 coro->prio = newprio;
1386 } 3399 }
1387} 3400}
1388 OUTPUT: 3401 OUTPUT:
… …
1390 3403
1391SV * 3404SV *
1392ready (SV *self) 3405ready (SV *self)
1393 PROTOTYPE: $ 3406 PROTOTYPE: $
1394 CODE: 3407 CODE:
1395 RETVAL = boolSV (api_ready (self)); 3408 RETVAL = boolSV (api_ready (aTHX_ self));
1396 OUTPUT:
1397 RETVAL
1398
1399SV *
1400is_ready (SV *self)
1401 PROTOTYPE: $
1402 CODE:
1403 RETVAL = boolSV (api_is_ready (self));
1404 OUTPUT: 3409 OUTPUT:
1405 RETVAL 3410 RETVAL
1406 3411
1407int 3412int
1408nready (...) 3413nready (...)
… …
1410 CODE: 3415 CODE:
1411 RETVAL = coro_nready; 3416 RETVAL = coro_nready;
1412 OUTPUT: 3417 OUTPUT:
1413 RETVAL 3418 RETVAL
1414 3419
1415MODULE = Coro::State PACKAGE = Coro::AIO 3420void
3421suspend (Coro::State self)
3422 PROTOTYPE: $
3423 CODE:
3424 self->flags |= CF_SUSPENDED;
3425
3426void
3427resume (Coro::State self)
3428 PROTOTYPE: $
3429 CODE:
3430 self->flags &= ~CF_SUSPENDED;
3431
3432void
3433_pool_handler (...)
3434 CODE:
3435 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3436
3437void
3438async_pool (SV *cv, ...)
3439 PROTOTYPE: &@
3440 PPCODE:
3441{
3442 HV *hv = (HV *)av_pop (av_async_pool);
3443 AV *av = newAV ();
3444 SV *cb = ST (0);
3445 int i;
3446
3447 av_extend (av, items - 2);
3448 for (i = 1; i < items; ++i)
3449 av_push (av, SvREFCNT_inc_NN (ST (i)));
3450
3451 if ((SV *)hv == &PL_sv_undef)
3452 {
3453 PUSHMARK (SP);
3454 EXTEND (SP, 2);
3455 PUSHs (sv_Coro);
3456 PUSHs ((SV *)cv_pool_handler);
3457 PUTBACK;
3458 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3459 SPAGAIN;
3460
3461 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3462 }
3463
3464 {
3465 struct coro *coro = SvSTATE_hv (hv);
3466
3467 assert (!coro->invoke_cb);
3468 assert (!coro->invoke_av);
3469 coro->invoke_cb = SvREFCNT_inc (cb);
3470 coro->invoke_av = av;
3471 }
3472
3473 api_ready (aTHX_ (SV *)hv);
3474
3475 if (GIMME_V != G_VOID)
3476 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3477 else
3478 SvREFCNT_dec (hv);
3479}
1416 3480
1417SV * 3481SV *
1418_get_state () 3482rouse_cb ()
3483 PROTOTYPE:
1419 CODE: 3484 CODE:
1420{ 3485 RETVAL = coro_new_rouse_cb (aTHX);
1421 struct io_state *data;
1422
1423 RETVAL = newSV (sizeof (struct io_state));
1424 data = (struct io_state *)SvPVX (RETVAL);
1425 SvCUR_set (RETVAL, sizeof (struct io_state));
1426 SvPOK_only (RETVAL);
1427
1428 data->errorno = errno;
1429 data->laststype = PL_laststype;
1430 data->laststatval = PL_laststatval;
1431 data->statcache = PL_statcache;
1432}
1433 OUTPUT: 3486 OUTPUT:
1434 RETVAL 3487 RETVAL
1435 3488
1436void 3489void
1437_set_state (char *data_) 3490rouse_wait (...)
3491 PROTOTYPE: ;$
3492 PPCODE:
3493 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3494
3495void
3496on_enter (SV *block)
3497 ALIAS:
3498 on_leave = 1
1438 PROTOTYPE: $ 3499 PROTOTYPE: &
1439 CODE: 3500 CODE:
1440{ 3501{
1441 struct io_state *data = (void *)data_; 3502 struct coro *coro = SvSTATE_current;
3503 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1442 3504
1443 errno = data->errorno; 3505 block = s_get_cv_croak (block);
1444 PL_laststype = data->laststype;
1445 PL_laststatval = data->laststatval;
1446 PL_statcache = data->statcache;
1447}
1448 3506
3507 if (!*avp)
3508 *avp = newAV ();
3509
3510 av_push (*avp, SvREFCNT_inc (block));
3511
3512 if (!ix)
3513 on_enterleave_call (aTHX_ block);
3514
3515 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3516 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3517 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3518}
3519
3520
3521MODULE = Coro::State PACKAGE = PerlIO::cede
3522
3523BOOT:
3524 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3525
3526
3527MODULE = Coro::State PACKAGE = Coro::Semaphore
3528
3529SV *
3530new (SV *klass, SV *count = 0)
3531 CODE:
3532{
3533 int semcnt = 1;
3534
3535 if (count)
3536 {
3537 SvGETMAGIC (count);
3538
3539 if (SvOK (count))
3540 semcnt = SvIV (count);
3541 }
3542
3543 RETVAL = sv_bless (
3544 coro_waitarray_new (aTHX_ semcnt),
3545 GvSTASH (CvGV (cv))
3546 );
3547}
3548 OUTPUT:
3549 RETVAL
3550
3551# helper for Coro::Channel and others
3552SV *
3553_alloc (int count)
3554 CODE:
3555 RETVAL = coro_waitarray_new (aTHX_ count);
3556 OUTPUT:
3557 RETVAL
3558
3559SV *
3560count (SV *self)
3561 CODE:
3562 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3563 OUTPUT:
3564 RETVAL
3565
3566void
3567up (SV *self, int adjust = 1)
3568 ALIAS:
3569 adjust = 1
3570 CODE:
3571 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3572
3573void
3574down (...)
3575 CODE:
3576 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3577
3578void
3579wait (...)
3580 CODE:
3581 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3582
3583void
3584try (SV *self)
3585 PPCODE:
3586{
3587 AV *av = (AV *)SvRV (self);
3588 SV *count_sv = AvARRAY (av)[0];
3589 IV count = SvIVX (count_sv);
3590
3591 if (count > 0)
3592 {
3593 --count;
3594 SvIVX (count_sv) = count;
3595 XSRETURN_YES;
3596 }
3597 else
3598 XSRETURN_NO;
3599}
3600
3601void
3602waiters (SV *self)
3603 PPCODE:
3604{
3605 AV *av = (AV *)SvRV (self);
3606 int wcount = AvFILLp (av) + 1 - 1;
3607
3608 if (GIMME_V == G_SCALAR)
3609 XPUSHs (sv_2mortal (newSViv (wcount)));
3610 else
3611 {
3612 int i;
3613 EXTEND (SP, wcount);
3614 for (i = 1; i <= wcount; ++i)
3615 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3616 }
3617}
3618
3619MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3620
3621void
3622_may_delete (SV *sem, int count, int extra_refs)
3623 PPCODE:
3624{
3625 AV *av = (AV *)SvRV (sem);
3626
3627 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3628 && AvFILLp (av) == 0 /* no waiters, just count */
3629 && SvIV (AvARRAY (av)[0]) == count)
3630 XSRETURN_YES;
3631
3632 XSRETURN_NO;
3633}
3634
3635MODULE = Coro::State PACKAGE = Coro::Signal
3636
3637SV *
3638new (SV *klass)
3639 CODE:
3640 RETVAL = sv_bless (
3641 coro_waitarray_new (aTHX_ 0),
3642 GvSTASH (CvGV (cv))
3643 );
3644 OUTPUT:
3645 RETVAL
3646
3647void
3648wait (...)
3649 CODE:
3650 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3651
3652void
3653broadcast (SV *self)
3654 CODE:
3655{
3656 AV *av = (AV *)SvRV (self);
3657 coro_signal_wake (aTHX_ av, AvFILLp (av));
3658}
3659
3660void
3661send (SV *self)
3662 CODE:
3663{
3664 AV *av = (AV *)SvRV (self);
3665
3666 if (AvFILLp (av))
3667 coro_signal_wake (aTHX_ av, 1);
3668 else
3669 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3670}
3671
3672IV
3673awaited (SV *self)
3674 CODE:
3675 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3676 OUTPUT:
3677 RETVAL
3678
3679
3680MODULE = Coro::State PACKAGE = Coro::AnyEvent
3681
3682BOOT:
3683 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3684
3685void
3686_schedule (...)
3687 CODE:
3688{
3689 static int incede;
3690
3691 api_cede_notself (aTHX);
3692
3693 ++incede;
3694 while (coro_nready >= incede && api_cede (aTHX))
3695 ;
3696
3697 sv_setsv (sv_activity, &PL_sv_undef);
3698 if (coro_nready >= incede)
3699 {
3700 PUSHMARK (SP);
3701 PUTBACK;
3702 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3703 }
3704
3705 --incede;
3706}
3707
3708
3709MODULE = Coro::State PACKAGE = Coro::AIO
3710
3711void
3712_register (char *target, char *proto, SV *req)
3713 CODE:
3714{
3715 SV *req_cv = s_get_cv_croak (req);
3716 /* newXSproto doesn't return the CV on 5.8 */
3717 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3718 sv_setpv ((SV *)slf_cv, proto);
3719 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3720}
3721

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