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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.141 by root, Mon Jan 22 18:45:17 2007 UTC vs.
Revision 1.368 by root, Thu Aug 13 02:35:41 2009 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "schmorp.h"
8 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#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
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end)) 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
39#else 74#else
40# define REGISTER_STACK(cctx,start,end) 75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
41#endif 77#endif
42 78
43/* the maximum number of idle cctx that will be pooled */ 79#define IN_DESTRUCT PL_dirty
44#define MAX_IDLE_CCTX 8
45 80
46#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if __GNUC__ >= 3
47 (PERL_REVISION > (a) \ 82# define attribute(x) __attribute__(x)
48 || (PERL_REVISION == (a) \ 83# define expect(expr,value) __builtin_expect ((expr), (value))
49 && (PERL_VERSION > (b) \ 84# define INLINE static inline
50 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 85#else
51 86# define attribute(x)
52#if !PERL_VERSION_ATLEAST (5,6,0) 87# define expect(expr,value) (expr)
53# ifndef PL_ppaddr 88# define INLINE static
54# define PL_ppaddr ppaddr
55# endif 89#endif
56# ifndef call_sv 90
57# define call_sv perl_call_sv 91#define expect_false(expr) expect ((expr) != 0, 0)
58# endif 92#define expect_true(expr) expect ((expr) != 0, 1)
59# ifndef get_sv 93
60# define get_sv perl_get_sv 94#define NOINLINE attribute ((noinline))
61# endif 95
62# ifndef get_cv 96#include "CoroAPI.h"
63# define get_cv perl_get_cv 97#define GCoroAPI (&coroapi) /* very sneaky */
64# endif 98
65# ifndef IS_PADGV 99#ifdef USE_ITHREADS
66# define IS_PADGV(v) 0 100# if CORO_PTHREAD
67# endif 101static void *coro_thx;
68# ifndef IS_PADCONST
69# define IS_PADCONST(v) 0
70# endif 102# endif
71#endif 103#endif
72 104
73/* 5.8.7 */ 105#ifdef __linux
74#ifndef SvRV_set 106# include <time.h> /* for timespec */
75# define SvRV_set(s,v) SvRV(s) = (v) 107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
76#endif 113#endif
77 114
78#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115static double (*nvtime)(); /* so why doesn't it take void? */
79# undef STACKGUARD 116static void (*u2time)(pTHX_ UV ret[2]);
80#endif
81 117
82#ifndef STACKGUARD 118/* we hijack an hopefully unused CV flag for our purposes */
83# define STACKGUARD 0 119#define CVf_SLF 0x4000
84#endif 120static OP *pp_slf (pTHX);
85 121
86/* prefer perl internal functions over our own? */ 122static U32 cctx_gen;
87#ifndef PREFER_PERL_FUNCTIONS 123static size_t cctx_stacksize = CORO_STACKSIZE;
88# define PREFER_PERL_FUNCTIONS 0
89#endif
90
91/* The next macro should declare a variable stacklevel that contains and approximation
92 * to the current C stack pointer. Its property is that it changes with each call
93 * and should be unique. */
94#define dSTACKLEVEL int stacklevel
95#define STACKLEVEL ((void *)&stacklevel)
96
97#define IN_DESTRUCT (PL_main_cv == Nullcv)
98
99#if __GNUC__ >= 3
100# define attribute(x) __attribute__(x)
101# define BARRIER __asm__ __volatile__ ("" : : : "memory")
102#else
103# define attribute(x)
104# define BARRIER
105#endif
106
107#define NOINLINE attribute ((noinline))
108
109#include "CoroAPI.h"
110
111#ifdef USE_ITHREADS
112static perl_mutex coro_mutex;
113# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
114# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
115#else
116# define LOCK (void)0
117# define UNLOCK (void)0
118#endif
119
120/* helper storage struct for Coro::AIO */
121struct io_state
122{
123 int errorno;
124 I32 laststype;
125 int laststatval;
126 Stat_t statcache;
127};
128
129static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
130static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
126static JMPENV *main_top_env;
131static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
132static 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;
133 157
134static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
135static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
136 160
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
137/* this is a structure representing a c-level coroutine */ 170/* this is a structure representing a c-level coroutine */
138typedef struct coro_cctx { 171typedef struct coro_cctx
172{
139 struct coro_cctx *next; 173 struct coro_cctx *next;
140 174
141 /* the stack */ 175 /* the stack */
142 void *sptr; 176 void *sptr;
143 ssize_t ssize; /* positive == mmap, otherwise malloc */ 177 size_t ssize;
144 178
145 /* cpu state */ 179 /* cpu state */
146 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147 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 */
148 JMPENV *top_env; 182 JMPENV *top_env;
149 coro_context cctx; 183 coro_context cctx;
150 184
151 int inuse; 185 U32 gen;
152
153#if USE_VALGRIND 186#if CORO_USE_VALGRIND
154 int valgrind_id; 187 int valgrind_id;
155#endif 188#endif
189 unsigned char flags;
156} coro_cctx; 190} coro_cctx;
191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
157 195
158enum { 196enum {
159 CF_RUNNING = 0x0001, /* coroutine is running */ 197 CF_RUNNING = 0x0001, /* coroutine is running */
160 CF_READY = 0x0002, /* coroutine is ready */ 198 CF_READY = 0x0002, /* coroutine is ready */
161 CF_NEW = 0x0004, /* has never been switched to */ 199 CF_NEW = 0x0004, /* has never been switched to */
162 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 */
163}; 202};
164 203
165/* this is a structure representing a perl-level coroutine */ 204/* the structure where most of the perl state is stored, overlaid on the cxstack */
166struct coro { 205typedef struct
167 /* the c coroutine allocated to this perl coroutine, if any */ 206{
168 coro_cctx *cctx; 207 SV *defsv;
169 208 AV *defav;
170 /* data associated with this coroutine (initial args) */ 209 SV *errsv;
171 AV *args; 210 SV *irsgv;
172 int refcnt; 211 HV *hinthv;
173 int save; /* CORO_SAVE flags */
174 int flags; /* CF_ flags */
175
176 /* optionally saved, might be zero */
177 AV *defav; /* @_ */
178 SV *defsv; /* $_ */
179 SV *errsv; /* $@ */
180 SV *irssv; /* $/ */
181 SV *irssv_sv; /* real $/ cache */
182
183#define VAR(name,type) type name; 212#define VAR(name,type) type name;
184# include "state.h" 213# include "state.h"
185#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 */
186 241
187 /* coro process data */ 242 /* coro process data */
188 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;
189}; 261};
190 262
191typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
192typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
193 265
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
194/** Coro ********************************************************************/ 271/** Coro ********************************************************************/
195 272
196#define PRIO_MAX 3 273#define CORO_PRIO_MAX 3
197#define PRIO_HIGH 1 274#define CORO_PRIO_HIGH 1
198#define PRIO_NORMAL 0 275#define CORO_PRIO_NORMAL 0
199#define PRIO_LOW -1 276#define CORO_PRIO_LOW -1
200#define PRIO_IDLE -3 277#define CORO_PRIO_IDLE -3
201#define PRIO_MIN -4 278#define CORO_PRIO_MIN -4
202 279
203/* for Coro.pm */ 280/* for Coro.pm */
204static SV *coro_current; 281static SV *coro_current;
205static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 282static SV *coro_readyhook;
206static 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
287
288/** Coro::Select ************************************************************/
289
290static OP *(*coro_old_pp_sselect) (pTHX);
291static SV *coro_select_select;
292
293/* horrible hack, but if it works... */
294static OP *
295coro_pp_sselect (aTHX)
296{
297 dSP;
298 PUSHMARK (SP - 4); /* fake argument list */
299 XPUSHs (coro_select_select);
300 PUTBACK;
301
302 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
303 PL_op->op_flags |= OPf_STACKED;
304 PL_op->op_private = 0;
305 return PL_ppaddr [OP_ENTERSUB](aTHX);
306}
207 307
208/** lowlevel stuff **********************************************************/ 308/** lowlevel stuff **********************************************************/
209 309
310static SV *
311coro_get_sv (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_sv (name, create);
316#endif
317 return get_sv (name, create);
318}
319
210static AV * 320static AV *
321coro_get_av (pTHX_ const char *name, int create)
322{
323#if PERL_VERSION_ATLEAST (5,10,0)
324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
325 get_av (name, create);
326#endif
327 return get_av (name, create);
328}
329
330static HV *
331coro_get_hv (pTHX_ const char *name, int create)
332{
333#if PERL_VERSION_ATLEAST (5,10,0)
334 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
335 get_hv (name, create);
336#endif
337 return get_hv (name, create);
338}
339
340INLINE void
341coro_times_update ()
342{
343#ifdef coro_clock_gettime
344 struct timespec ts;
345
346 ts.tv_sec = ts.tv_nsec = 0;
347 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
348 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
349
350 ts.tv_sec = ts.tv_nsec = 0;
351 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
352 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
353#else
354 dTHX;
355 UV tv[2];
356
357 u2time (aTHX_ tv);
358 time_real [0] = tv [0];
359 time_real [1] = tv [1] * 1000;
360#endif
361}
362
363INLINE void
364coro_times_add (struct coro *c)
365{
366 c->t_real [1] += time_real [1];
367 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
368 c->t_real [0] += time_real [0];
369
370 c->t_cpu [1] += time_cpu [1];
371 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
372 c->t_cpu [0] += time_cpu [0];
373}
374
375INLINE void
376coro_times_sub (struct coro *c)
377{
378 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
379 c->t_real [1] -= time_real [1];
380 c->t_real [0] -= time_real [0];
381
382 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
383 c->t_cpu [1] -= time_cpu [1];
384 c->t_cpu [0] -= time_cpu [0];
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
439static AV *
211coro_clone_padlist (CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
212{ 441{
213 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
214 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
215 444
216 newpadlist = newAV (); 445 newpadlist = newAV ();
217 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
218#if PERL_VERSION_ATLEAST (5,9,0) 447#if PERL_VERSION_ATLEAST (5,10,0)
219 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 448 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
220#else 449#else
221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
222#endif 451#endif
223 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
224 --AvFILLp (padlist); 453 --AvFILLp (padlist);
225 454
226 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
227 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
228 457
229 return newpadlist; 458 return newpadlist;
230} 459}
231 460
232static void 461static void
233free_padlist (AV *padlist) 462free_padlist (pTHX_ AV *padlist)
234{ 463{
235 /* may be during global destruction */ 464 /* may be during global destruction */
236 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
237 { 466 {
238 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
239 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
240 { 470 {
241 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
242 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
243 { 473 I32 j = AvFILLp (av);
244 SV *sv; 474
245 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
246 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
247
248 SvREFCNT_dec (*svp);
249 }
250 } 480 }
251 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
252 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
253 } 486 }
254} 487}
255 488
256static int 489static int
257coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
258{ 491{
259 AV *padlist; 492 AV *padlist;
260 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
261 494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return 0;
498
262 /* casting is fun. */ 499 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist); 501 free_padlist (aTHX_ padlist);
265 502
266 SvREFCNT_dec (av); 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
267 504
268 return 0; 505 return 0;
269} 506}
270 507
271#define PERL_MAGIC_coro PERL_MAGIC_ext 508static MGVTBL coro_cv_vtbl = {
272 509 0, 0, 0, 0,
273static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 510 coro_cv_free
274 511};
275#define CORO_MAGIC(cv) \
276 SvMAGIC (cv) \
277 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278 ? SvMAGIC (cv) \
279 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
280 : 0
281 512
282/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
283static void 514static void
284get_padlist (CV *cv) 515get_padlist (pTHX_ CV *cv)
285{ 516{
286 MAGIC *mg = CORO_MAGIC (cv); 517 MAGIC *mg = CORO_MAGIC_cv (cv);
287 AV *av; 518 AV *av;
288 519
289 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291 else 522 else
292 { 523 {
293#if PREFER_PERL_FUNCTIONS 524#if CORO_PREFER_PERL_FUNCTIONS
294 /* this is probably cleaner, but also slower? */ 525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
295 CV *cp = Perl_cv_clone (cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
296 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
297 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
298 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
299#else 531#else
300 CvPADLIST (cv) = coro_clone_padlist (cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
301#endif 533#endif
302 } 534 }
303} 535}
304 536
305static void 537static void
306put_padlist (CV *cv) 538put_padlist (pTHX_ CV *cv)
307{ 539{
308 MAGIC *mg = CORO_MAGIC (cv); 540 MAGIC *mg = CORO_MAGIC_cv (cv);
309 AV *av; 541 AV *av;
310 542
311 if (!mg) 543 if (expect_false (!mg))
312 { 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
313 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315 mg->mg_virtual = &vtbl_coro;
316 mg->mg_obj = (SV *)newAV ();
317 }
318 545
319 av = (AV *)mg->mg_obj; 546 av = (AV *)mg->mg_obj;
320 547
321 if (AvFILLp (av) >= AvMAX (av)) 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
322 av_extend (av, AvMAX (av) + 1); 549 av_extend (av, AvFILLp (av) + 1);
323 550
324 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325} 552}
326 553
327/** load & save, init *******************************************************/ 554/** load & save, init *******************************************************/
328 555
329#define SB do {
330#define SE } while (0)
331
332#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
333
334static void 556static void
557on_enterleave_call (pTHX_ SV *cb);
558
559static void
335load_perl (Coro__State c) 560load_perl (pTHX_ Coro__State c)
336{ 561{
562 perl_slots *slot = c->slot;
563 c->slot = 0;
564
565 PL_mainstack = c->mainstack;
566
567 GvSV (PL_defgv) = slot->defsv;
568 GvAV (PL_defgv) = slot->defav;
569 GvSV (PL_errgv) = slot->errsv;
570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
572
337#define VAR(name,type) PL_ ## name = c->name; 573 #define VAR(name,type) PL_ ## name = slot->name;
338# include "state.h" 574 # include "state.h"
339#undef VAR 575 #undef VAR
340
341 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
342 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
343 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344 if (c->irssv)
345 {
346 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347 SvREFCNT_dec (c->irssv);
348 else
349 {
350 REPLACE_SV (PL_rs, c->irssv);
351 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352 sv_setsv (c->irssv_sv, PL_rs);
353 }
354 }
355 576
356 { 577 {
357 dSP; 578 dSP;
579
358 CV *cv; 580 CV *cv;
359 581
360 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
361 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
362 { 584 {
363 put_padlist (cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
364 CvDEPTH (cv) = PTR2IV (POPs); 586 CvDEPTH (cv) = PTR2IV (POPs);
365 CvPADLIST (cv) = (AV *)POPs; 587 CvPADLIST (cv) = (AV *)POPs;
366 } 588 }
367 589
368 PUTBACK; 590 PUTBACK;
369 } 591 }
370}
371 592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (enable_times))
597 {
598 if (expect_false (!times_valid))
599 coro_times_update ();
600
601 coro_times_sub (c);
602 }
603
604 if (expect_false (c->on_enter))
605 {
606 int i;
607
608 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
610 }
611}
612
372static void 613static void
373save_perl (Coro__State c) 614save_perl (pTHX_ Coro__State c)
374{ 615{
616 if (expect_false (c->on_leave))
617 {
618 int i;
619
620 for (i = AvFILLp (c->on_leave); i >= 0; --i)
621 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
622 }
623
624 times_valid = 0;
625
626 if (expect_false (enable_times))
627 {
628 coro_times_update (); times_valid = 1;
629 coro_times_add (c);
630 }
631
632 c->except = CORO_THROW;
633 c->slf_frame = slf_frame;
634
375 { 635 {
376 dSP; 636 dSP;
377 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
378 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
379 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
381 /* 641 /*
382 * the worst thing you can imagine happens first - we have to save 642 * the worst thing you can imagine happens first - we have to save
383 * (and reinitialize) all cv's in the whole callchain :( 643 * (and reinitialize) all cv's in the whole callchain :(
384 */ 644 */
385 645
386 EXTEND (SP, 3 + 1);
387 PUSHs (Nullsv); 646 XPUSHs (Nullsv);
388 /* this loop was inspired by pp_caller */ 647 /* this loop was inspired by pp_caller */
389 for (;;) 648 for (;;)
390 { 649 {
391 while (cxix >= 0) 650 while (expect_true (cxix >= 0))
392 { 651 {
393 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
394 653
395 if (CxTYPE (cx) == CXt_SUB) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
396 { 655 {
397 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
398 657
399 if (CvDEPTH (cv)) 658 if (expect_true (CvDEPTH (cv)))
400 { 659 {
401 EXTEND (SP, 3); 660 EXTEND (SP, 3);
402 PUSHs ((SV *)CvPADLIST (cv)); 661 PUSHs ((SV *)CvPADLIST (cv));
403 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 662 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
404 PUSHs ((SV *)cv); 663 PUSHs ((SV *)cv);
405 664
406 CvDEPTH (cv) = 0; 665 CvDEPTH (cv) = 0;
407 get_padlist (cv); 666 get_padlist (aTHX_ cv);
408 } 667 }
409 } 668 }
410 } 669 }
411 670
412 if (top_si->si_type == PERLSI_MAIN) 671 if (expect_true (top_si->si_type == PERLSI_MAIN))
413 break; 672 break;
414 673
415 top_si = top_si->si_prev; 674 top_si = top_si->si_prev;
416 ccstk = top_si->si_cxstack; 675 ccstk = top_si->si_cxstack;
417 cxix = top_si->si_cxix; 676 cxix = top_si->si_cxix;
418 } 677 }
419 678
420 PUTBACK; 679 PUTBACK;
421 } 680 }
422 681
423 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 682 /* allocate some space on the context stack for our purposes */
424 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 683 /* we manually unroll here, as usually 2 slots is enough */
425 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 684 if (SLOT_COUNT >= 1) CXINC;
426 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 685 if (SLOT_COUNT >= 2) CXINC;
686 if (SLOT_COUNT >= 3) CXINC;
687 {
688 unsigned int i;
689 for (i = 3; i < SLOT_COUNT; ++i)
690 CXINC;
691 }
692 cxstack_ix -= SLOT_COUNT; /* undo allocation */
427 693
694 c->mainstack = PL_mainstack;
695
696 {
697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
698
699 slot->defav = GvAV (PL_defgv);
700 slot->defsv = DEFSV;
701 slot->errsv = ERRSV;
702 slot->irsgv = GvSV (irsgv);
703 slot->hinthv = GvHV (PL_hintgv);
704
428#define VAR(name,type)c->name = PL_ ## name; 705 #define VAR(name,type) slot->name = PL_ ## name;
429# include "state.h" 706 # include "state.h"
430#undef VAR 707 #undef VAR
708 }
431} 709}
432 710
433/* 711/*
434 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
435 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
436 * on the (sometimes correct) assumption that coroutines do 714 * on the (sometimes correct) assumption that coroutines do
437 * not usually need a lot of stackspace. 715 * not usually need a lot of stackspace.
438 */ 716 */
439#if PREFER_PERL_FUNCTIONS 717#if CORO_PREFER_PERL_FUNCTIONS
440# define coro_init_stacks init_stacks 718# define coro_init_stacks(thx) init_stacks ()
441#else 719#else
442static void 720static void
443coro_init_stacks () 721coro_init_stacks (pTHX)
444{ 722{
445 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 723 PL_curstackinfo = new_stackinfo(32, 8);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 724 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 725 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 726 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 727
450 PL_stack_base = AvARRAY(PL_curstack); 728 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 729 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 730 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 731
454 New(50,PL_tmps_stack,128,SV*); 732 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 733 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 734 PL_tmps_ix = -1;
457 PL_tmps_max = 128; 735 PL_tmps_max = 32;
458 736
459 New(54,PL_markstack,32,I32); 737 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 738 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 32; 739 PL_markstack_max = PL_markstack + 16;
462 740
463#ifdef SET_MARK_OFFSET 741#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 742 SET_MARK_OFFSET;
465#endif 743#endif
466 744
467 New(54,PL_scopestack,32,I32); 745 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 746 PL_scopestack_ix = 0;
469 PL_scopestack_max = 32; 747 PL_scopestack_max = 8;
470 748
471 New(54,PL_savestack,64,ANY); 749 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 750 PL_savestack_ix = 0;
473 PL_savestack_max = 64; 751 PL_savestack_max = 24;
474 752
475#if !PERL_VERSION_ATLEAST (5,9,0) 753#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,16,OP*); 754 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 755 PL_retstack_ix = 0;
478 PL_retstack_max = 16; 756 PL_retstack_max = 4;
479#endif 757#endif
480} 758}
481#endif 759#endif
482 760
483/* 761/*
484 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
485 */ 763 */
486static void 764static void
487coro_destroy_stacks () 765coro_destruct_stacks (pTHX)
488{ 766{
489 if (!IN_DESTRUCT)
490 {
491 /* restore all saved variables and stuff */
492 LEAVE_SCOPE (0);
493 assert (PL_tmps_floor == -1);
494
495 /* free all temporaries */
496 FREETMPS;
497 assert (PL_tmps_ix == -1);
498
499 /* unwind all extra stacks */
500 POPSTACK_TO (PL_mainstack);
501
502 /* unwind main stack */
503 dounwind (-1);
504 }
505
506 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
508 769
509 while (PL_curstackinfo) 770 while (PL_curstackinfo)
510 { 771 {
… …
520 781
521 Safefree (PL_tmps_stack); 782 Safefree (PL_tmps_stack);
522 Safefree (PL_markstack); 783 Safefree (PL_markstack);
523 Safefree (PL_scopestack); 784 Safefree (PL_scopestack);
524 Safefree (PL_savestack); 785 Safefree (PL_savestack);
525#if !PERL_VERSION_ATLEAST (5,9,0) 786#if !PERL_VERSION_ATLEAST (5,10,0)
526 Safefree (PL_retstack); 787 Safefree (PL_retstack);
527#endif 788#endif
528} 789}
529 790
791#define CORO_RSS \
792 rss += sizeof (SYM (curstackinfo)); \
793 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
794 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
795 rss += SYM (tmps_max) * sizeof (SV *); \
796 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
797 rss += SYM (scopestack_max) * sizeof (I32); \
798 rss += SYM (savestack_max) * sizeof (ANY);
799
800static size_t
801coro_rss (pTHX_ struct coro *coro)
802{
803 size_t rss = sizeof (*coro);
804
805 if (coro->mainstack)
806 {
807 if (coro->flags & CF_RUNNING)
808 {
809 #define SYM(sym) PL_ ## sym
810 CORO_RSS;
811 #undef SYM
812 }
813 else
814 {
815 #define SYM(sym) coro->slot->sym
816 CORO_RSS;
817 #undef SYM
818 }
819 }
820
821 return rss;
822}
823
530/** coroutine stack handling ************************************************/ 824/** coroutine stack handling ************************************************/
531 825
826static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
828static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
829
830/* apparently < 5.8.8 */
831#ifndef MgPV_nolen_const
832#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
833 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
834 (const char*)(mg)->mg_ptr)
835#endif
836
837/*
838 * This overrides the default magic get method of %SIG elements.
839 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
840 * and instead of trying to save and restore the hash elements, we just provide
841 * readback here.
842 */
532static void 843static int
533setup_coro (struct coro *coro) 844coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
845{
846 const char *s = MgPV_nolen_const (mg);
847
848 if (*s == '_')
849 {
850 SV **svp = 0;
851
852 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
853 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
854
855 if (svp)
856 {
857 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
858 return 0;
859 }
860 }
861
862 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
863}
864
865static int
866coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
867{
868 const char *s = MgPV_nolen_const (mg);
869
870 if (*s == '_')
871 {
872 SV **svp = 0;
873
874 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
875 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
876
877 if (svp)
878 {
879 SV *old = *svp;
880 *svp = 0;
881 SvREFCNT_dec (old);
882 return 0;
883 }
884 }
885
886 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
887}
888
889static int
890coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
891{
892 const char *s = MgPV_nolen_const (mg);
893
894 if (*s == '_')
895 {
896 SV **svp = 0;
897
898 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
899 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
900
901 if (svp)
902 {
903 SV *old = *svp;
904 *svp = SvOK (sv) ? newSVsv (sv) : 0;
905 SvREFCNT_dec (old);
906 return 0;
907 }
908 }
909
910 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
911}
912
913static void
914prepare_nop (pTHX_ struct coro_transfer_args *ta)
915{
916 /* kind of mega-hacky, but works */
917 ta->next = ta->prev = (struct coro *)ta;
918}
919
920static int
921slf_check_nop (pTHX_ struct CoroSLF *frame)
922{
923 return 0;
924}
925
926static int
927slf_check_repeat (pTHX_ struct CoroSLF *frame)
928{
929 return 1;
930}
931
932static UNOP coro_setup_op;
933
934static void NOINLINE /* noinline to keep it out of the transfer fast path */
935coro_setup (pTHX_ struct coro *coro)
534{ 936{
535 /* 937 /*
536 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
537 */ 939 */
538
539 coro_init_stacks (); 940 coro_init_stacks (aTHX);
540 941
942 PL_runops = RUNOPS_DEFAULT;
541 PL_curcop = &PL_compiling; 943 PL_curcop = &PL_compiling;
542 PL_in_eval = EVAL_NULL; 944 PL_in_eval = EVAL_NULL;
945 PL_comppad = 0;
946 PL_comppad_name = 0;
947 PL_comppad_name_fill = 0;
948 PL_comppad_name_floor = 0;
543 PL_curpm = 0; 949 PL_curpm = 0;
950 PL_curpad = 0;
544 PL_localizing = 0; 951 PL_localizing = 0;
545 PL_dirty = 0; 952 PL_dirty = 0;
546 PL_restartop = 0; 953 PL_restartop = 0;
954#if PERL_VERSION_ATLEAST (5,10,0)
955 PL_parser = 0;
956#endif
957 PL_hints = 0;
958
959 /* recreate the die/warn hooks */
960 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
961 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
962
963 GvSV (PL_defgv) = newSV (0);
964 GvAV (PL_defgv) = coro->args; coro->args = 0;
965 GvSV (PL_errgv) = newSV (0);
966 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
967 GvHV (PL_hintgv) = 0;
968 PL_rs = newSVsv (GvSV (irsgv));
969 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
547 970
548 { 971 {
549 dSP; 972 dSP;
550 LOGOP myop; 973 UNOP myop;
551 974
552 SvREFCNT_dec (GvAV (PL_defgv));
553 GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555 Zero (&myop, 1, LOGOP); 975 Zero (&myop, 1, UNOP);
556 myop.op_next = Nullop; 976 myop.op_next = Nullop;
977 myop.op_type = OP_ENTERSUB;
557 myop.op_flags = OPf_WANT_VOID; 978 myop.op_flags = OPf_WANT_VOID;
558 979
559 PUSHMARK (SP); 980 PUSHMARK (SP);
560 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 981 PUSHs ((SV *)coro->startcv);
561 PUTBACK; 982 PUTBACK;
562 PL_op = (OP *)&myop; 983 PL_op = (OP *)&myop;
563 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 984 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
564 SPAGAIN;
565 } 985 }
566 986
567 ENTER; /* necessary e.g. for dounwind */ 987 /* this newly created coroutine might be run on an existing cctx which most
568} 988 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
989 */
990 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
991 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
569 992
993 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
994 coro_setup_op.op_next = PL_op;
995 coro_setup_op.op_type = OP_ENTERSUB;
996 coro_setup_op.op_ppaddr = pp_slf;
997 /* no flags etc. required, as an init function won't be called */
998
999 PL_op = (OP *)&coro_setup_op;
1000
1001 /* copy throw, in case it was set before coro_setup */
1002 CORO_THROW = coro->except;
1003
1004 if (expect_false (enable_times))
1005 {
1006 coro_times_update ();
1007 coro_times_sub (coro);
1008 }
1009}
1010
570static void 1011static void
1012coro_unwind_stacks (pTHX)
1013{
1014 if (!IN_DESTRUCT)
1015 {
1016 /* restore all saved variables and stuff */
1017 LEAVE_SCOPE (0);
1018 assert (PL_tmps_floor == -1);
1019
1020 /* free all temporaries */
1021 FREETMPS;
1022 assert (PL_tmps_ix == -1);
1023
1024 /* unwind all extra stacks */
1025 POPSTACK_TO (PL_mainstack);
1026
1027 /* unwind main stack */
1028 dounwind (-1);
1029 }
1030}
1031
1032static void
1033coro_destruct_perl (pTHX_ struct coro *coro)
1034{
1035 SV *svf [9];
1036
1037 {
1038 struct coro *current = SvSTATE_current;
1039
1040 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1041
1042 save_perl (aTHX_ current);
1043 load_perl (aTHX_ coro);
1044
1045 coro_unwind_stacks (aTHX);
1046 coro_destruct_stacks (aTHX);
1047
1048 // now save some sv's to be free'd later
1049 svf [0] = GvSV (PL_defgv);
1050 svf [1] = (SV *)GvAV (PL_defgv);
1051 svf [2] = GvSV (PL_errgv);
1052 svf [3] = (SV *)PL_defoutgv;
1053 svf [4] = PL_rs;
1054 svf [5] = GvSV (irsgv);
1055 svf [6] = (SV *)GvHV (PL_hintgv);
1056 svf [7] = PL_diehook;
1057 svf [8] = PL_warnhook;
1058 assert (9 == sizeof (svf) / sizeof (*svf));
1059
1060 load_perl (aTHX_ current);
1061 }
1062
1063 {
1064 unsigned int i;
1065
1066 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1067 SvREFCNT_dec (svf [i]);
1068
1069 SvREFCNT_dec (coro->saved_deffh);
1070 SvREFCNT_dec (coro->rouse_cb);
1071 SvREFCNT_dec (coro->invoke_cb);
1072 SvREFCNT_dec (coro->invoke_av);
1073 }
1074}
1075
1076INLINE void
571free_coro_mortal () 1077free_coro_mortal (pTHX)
572{ 1078{
573 if (coro_mortal) 1079 if (expect_true (coro_mortal))
574 { 1080 {
575 SvREFCNT_dec (coro_mortal); 1081 SvREFCNT_dec (coro_mortal);
576 coro_mortal = 0; 1082 coro_mortal = 0;
577 } 1083 }
578} 1084}
579 1085
580/* inject a fake call to Coro::State::_cctx_init into the execution */ 1086static int
1087runops_trace (pTHX)
1088{
1089 COP *oldcop = 0;
1090 int oldcxix = -2;
1091
1092 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1093 {
1094 PERL_ASYNC_CHECK ();
1095
1096 if (cctx_current->flags & CC_TRACE_ALL)
1097 {
1098 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1099 {
1100 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1101 SV **bot, **top;
1102 AV *av = newAV (); /* return values */
1103 SV **cb;
1104 dSP;
1105
1106 GV *gv = CvGV (cx->blk_sub.cv);
1107 SV *fullname = sv_2mortal (newSV (0));
1108 if (isGV (gv))
1109 gv_efullname3 (fullname, gv, 0);
1110
1111 bot = PL_stack_base + cx->blk_oldsp + 1;
1112 top = cx->blk_gimme == G_ARRAY ? SP + 1
1113 : cx->blk_gimme == G_SCALAR ? bot + 1
1114 : bot;
1115
1116 av_extend (av, top - bot);
1117 while (bot < top)
1118 av_push (av, SvREFCNT_inc_NN (*bot++));
1119
1120 PL_runops = RUNOPS_DEFAULT;
1121 ENTER;
1122 SAVETMPS;
1123 EXTEND (SP, 3);
1124 PUSHMARK (SP);
1125 PUSHs (&PL_sv_no);
1126 PUSHs (fullname);
1127 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1128 PUTBACK;
1129 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1130 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1131 SPAGAIN;
1132 FREETMPS;
1133 LEAVE;
1134 PL_runops = runops_trace;
1135 }
1136
1137 if (oldcop != PL_curcop)
1138 {
1139 oldcop = PL_curcop;
1140
1141 if (PL_curcop != &PL_compiling)
1142 {
1143 SV **cb;
1144
1145 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1146 {
1147 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1148
1149 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1150 {
1151 dSP;
1152 GV *gv = CvGV (cx->blk_sub.cv);
1153 SV *fullname = sv_2mortal (newSV (0));
1154
1155 if (isGV (gv))
1156 gv_efullname3 (fullname, gv, 0);
1157
1158 PL_runops = RUNOPS_DEFAULT;
1159 ENTER;
1160 SAVETMPS;
1161 EXTEND (SP, 3);
1162 PUSHMARK (SP);
1163 PUSHs (&PL_sv_yes);
1164 PUSHs (fullname);
1165 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1166 PUTBACK;
1167 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1168 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1169 SPAGAIN;
1170 FREETMPS;
1171 LEAVE;
1172 PL_runops = runops_trace;
1173 }
1174
1175 oldcxix = cxstack_ix;
1176 }
1177
1178 if (cctx_current->flags & CC_TRACE_LINE)
1179 {
1180 dSP;
1181
1182 PL_runops = RUNOPS_DEFAULT;
1183 ENTER;
1184 SAVETMPS;
1185 EXTEND (SP, 3);
1186 PL_runops = RUNOPS_DEFAULT;
1187 PUSHMARK (SP);
1188 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1189 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1190 PUTBACK;
1191 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1192 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1193 SPAGAIN;
1194 FREETMPS;
1195 LEAVE;
1196 PL_runops = runops_trace;
1197 }
1198 }
1199 }
1200 }
1201 }
1202
1203 TAINT_NOT;
1204 return 0;
1205}
1206
1207static struct CoroSLF cctx_ssl_frame;
1208
1209static void
1210slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1211{
1212 ta->prev = 0;
1213}
1214
1215static int
1216slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1217{
1218 *frame = cctx_ssl_frame;
1219
1220 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1221}
1222
1223/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
581static void NOINLINE 1224static void NOINLINE
582prepare_cctx (coro_cctx *cctx) 1225cctx_prepare (pTHX)
583{ 1226{
584 dSP;
585 LOGOP myop;
586
587 Zero (&myop, 1, LOGOP);
588 myop.op_next = PL_op;
589 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
590
591 PUSHMARK (SP);
592 EXTEND (SP, 2);
593 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
594 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
595 PUTBACK;
596 PL_op = (OP *)&myop;
597 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
598 SPAGAIN;
599}
600
601static void
602coro_run (void *arg)
603{
604 /* coro_run is the alternative tail of transfer(), so unlock here. */
605 UNLOCK;
606
607 /*
608 * this is a _very_ stripped down perl interpreter ;)
609 */
610 PL_top_env = &PL_start_env; 1227 PL_top_env = &PL_start_env;
611 1228
1229 if (cctx_current->flags & CC_TRACE)
1230 PL_runops = runops_trace;
1231
1232 /* we already must be executing an SLF op, there is no other valid way
1233 * that can lead to creation of a new cctx */
1234 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1235 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1236
1237 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1238 cctx_ssl_frame = slf_frame;
1239
1240 slf_frame.prepare = slf_prepare_set_stacklevel;
1241 slf_frame.check = slf_check_set_stacklevel;
1242}
1243
1244/* the tail of transfer: execute stuff we can only do after a transfer */
1245INLINE void
1246transfer_tail (pTHX)
1247{
1248 free_coro_mortal (aTHX);
1249}
1250
1251/*
1252 * this is a _very_ stripped down perl interpreter ;)
1253 */
1254static void
1255cctx_run (void *arg)
1256{
1257#ifdef USE_ITHREADS
1258# if CORO_PTHREAD
1259 PERL_SET_CONTEXT (coro_thx);
1260# endif
1261#endif
1262 {
1263 dTHX;
1264
1265 /* normally we would need to skip the entersub here */
1266 /* not doing so will re-execute it, which is exactly what we want */
1267 /* PL_nop = PL_nop->op_next */
1268
612 /* inject call to cctx_init */ 1269 /* inject a fake subroutine call to cctx_init */
613 prepare_cctx ((coro_cctx *)arg); 1270 cctx_prepare (aTHX);
614 1271
1272 /* cctx_run is the alternative tail of transfer() */
1273 transfer_tail (aTHX);
1274
615 /* somebody will hit me for both perl_run and PL_restartop */ 1275 /* somebody or something will hit me for both perl_run and PL_restartop */
616 PL_restartop = PL_op; 1276 PL_restartop = PL_op;
617 perl_run (PL_curinterp); 1277 perl_run (PL_curinterp);
1278 /*
1279 * Unfortunately, there is no way to get at the return values of the
1280 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1281 * runtime errors here, as this is just a random interpreter, not a thread.
1282 */
618 1283
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1284 /*
620 abort (); 1285 * If perl-run returns we assume exit() was being called or the coro
1286 * fell off the end, which seems to be the only valid (non-bug)
1287 * reason for perl_run to return. We try to exit by jumping to the
1288 * bootstrap-time "top" top_env, as we cannot restore the "main"
1289 * coroutine as Coro has no such concept.
1290 * This actually isn't valid with the pthread backend, but OSes requiring
1291 * that backend are too broken to do it in a standards-compliant way.
1292 */
1293 PL_top_env = main_top_env;
1294 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1295 }
621} 1296}
622 1297
623static coro_cctx * 1298static coro_cctx *
624cctx_new () 1299cctx_new ()
625{ 1300{
626 coro_cctx *cctx; 1301 coro_cctx *cctx;
627 1302
628 ++cctx_count; 1303 ++cctx_count;
629
630 Newz (0, cctx, 1, coro_cctx); 1304 New (0, cctx, 1, coro_cctx);
1305
1306 cctx->gen = cctx_gen;
1307 cctx->flags = 0;
1308 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1309
1310 return cctx;
1311}
1312
1313/* create a new cctx only suitable as source */
1314static coro_cctx *
1315cctx_new_empty ()
1316{
1317 coro_cctx *cctx = cctx_new ();
1318
1319 cctx->sptr = 0;
1320 coro_create (&cctx->cctx, 0, 0, 0, 0);
1321
1322 return cctx;
1323}
1324
1325/* create a new cctx suitable as destination/running a perl interpreter */
1326static coro_cctx *
1327cctx_new_run ()
1328{
1329 coro_cctx *cctx = cctx_new ();
1330 void *stack_start;
1331 size_t stack_size;
631 1332
632#if HAVE_MMAP 1333#if HAVE_MMAP
633
634 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1334 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
635 /* mmap supposedly does allocate-on-write for us */ 1335 /* mmap supposedly does allocate-on-write for us */
636 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1336 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
637 1337
638 if (cctx->sptr != (void *)-1) 1338 if (cctx->sptr != (void *)-1)
639 { 1339 {
640# if STACKGUARD 1340 #if CORO_STACKGUARD
641 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1341 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
642# endif 1342 #endif
643 REGISTER_STACK ( 1343 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
644 cctx, 1344 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
645 STACKGUARD * PAGESIZE + (char *)cctx->sptr, 1345 cctx->flags |= CC_MAPPED;
646 cctx->ssize + (char *)cctx->sptr
647 );
648
649 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
650 } 1346 }
651 else 1347 else
652#endif 1348#endif
653 { 1349 {
654 cctx->ssize = -STACKSIZE * (long)sizeof (long); 1350 cctx->ssize = cctx_stacksize * (long)sizeof (long);
655 New (0, cctx->sptr, STACKSIZE, long); 1351 New (0, cctx->sptr, cctx_stacksize, long);
656 1352
657 if (!cctx->sptr) 1353 if (!cctx->sptr)
658 { 1354 {
659 perror ("FATAL: unable to allocate stack for coroutine"); 1355 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
660 _exit (EXIT_FAILURE); 1356 _exit (EXIT_FAILURE);
661 } 1357 }
662 1358
663 REGISTER_STACK ( 1359 stack_start = cctx->sptr;
664 cctx, 1360 stack_size = cctx->ssize;
665 (char *)cctx->sptr,
666 (char *)cctx->sptr - cctx->ssize
667 );
668
669 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
670 } 1361 }
1362
1363 #if CORO_USE_VALGRIND
1364 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1365 #endif
1366
1367 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
671 1368
672 return cctx; 1369 return cctx;
673} 1370}
674 1371
675static void 1372static void
676cctx_destroy (coro_cctx *cctx) 1373cctx_destroy (coro_cctx *cctx)
677{ 1374{
678 if (!cctx) 1375 if (!cctx)
679 return; 1376 return;
680 1377
1378 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1379
681 --cctx_count; 1380 --cctx_count;
1381 coro_destroy (&cctx->cctx);
682 1382
683#if USE_VALGRIND 1383 /* coro_transfer creates new, empty cctx's */
1384 if (cctx->sptr)
1385 {
1386 #if CORO_USE_VALGRIND
684 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1387 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1388 #endif
1389
1390#if HAVE_MMAP
1391 if (cctx->flags & CC_MAPPED)
1392 munmap (cctx->sptr, cctx->ssize);
1393 else
685#endif 1394#endif
686
687#if HAVE_MMAP
688 if (cctx->ssize > 0)
689 munmap (cctx->sptr, cctx->ssize);
690 else
691#endif
692 Safefree (cctx->sptr); 1395 Safefree (cctx->sptr);
1396 }
693 1397
694 Safefree (cctx); 1398 Safefree (cctx);
695} 1399}
696 1400
1401/* wether this cctx should be destructed */
1402#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1403
697static coro_cctx * 1404static coro_cctx *
698cctx_get () 1405cctx_get (pTHX)
699{ 1406{
700 coro_cctx *cctx; 1407 while (expect_true (cctx_first))
701
702 if (cctx_first)
703 { 1408 {
704 cctx = cctx_first; 1409 coro_cctx *cctx = cctx_first;
705 cctx_first = cctx->next; 1410 cctx_first = cctx->next;
706 --cctx_idle; 1411 --cctx_idle;
707 } 1412
708 else 1413 if (expect_true (!CCTX_EXPIRED (cctx)))
709 { 1414 return cctx;
710 cctx = cctx_new (); 1415
711 PL_op = PL_op->op_next; 1416 cctx_destroy (cctx);
712 } 1417 }
713 1418
714 return cctx; 1419 return cctx_new_run ();
715} 1420}
716 1421
717static void 1422static void
718cctx_put (coro_cctx *cctx) 1423cctx_put (coro_cctx *cctx)
719{ 1424{
1425 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1426
720 /* free another cctx if overlimit */ 1427 /* free another cctx if overlimit */
721 if (cctx_idle >= MAX_IDLE_CCTX) 1428 if (expect_false (cctx_idle >= cctx_max_idle))
722 { 1429 {
723 coro_cctx *first = cctx_first; 1430 coro_cctx *first = cctx_first;
724 cctx_first = first->next; 1431 cctx_first = first->next;
725 --cctx_idle; 1432 --cctx_idle;
726 1433
727 assert (!first->inuse);
728 cctx_destroy (first); 1434 cctx_destroy (first);
729 } 1435 }
730 1436
731 ++cctx_idle; 1437 ++cctx_idle;
732 cctx->next = cctx_first; 1438 cctx->next = cctx_first;
733 cctx_first = cctx; 1439 cctx_first = cctx;
734} 1440}
735 1441
736/** coroutine switching *****************************************************/ 1442/** coroutine switching *****************************************************/
737 1443
738/* never call directly, always through the coro_state_transfer global variable */ 1444static void
739static void NOINLINE
740transfer (struct coro *prev, struct coro *next) 1445transfer_check (pTHX_ struct coro *prev, struct coro *next)
1446{
1447 /* TODO: throwing up here is considered harmful */
1448
1449 if (expect_true (prev != next))
1450 {
1451 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1452 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1453
1454 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1455 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1456
1457#if !PERL_VERSION_ATLEAST (5,10,0)
1458 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1459 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1460#endif
1461 }
1462}
1463
1464/* always use the TRANSFER macro */
1465static void NOINLINE /* noinline so we have a fixed stackframe */
1466transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
741{ 1467{
742 dSTACKLEVEL; 1468 dSTACKLEVEL;
743 1469
744 /* sometimes transfer is only called to set idle_sp */ 1470 /* sometimes transfer is only called to set idle_sp */
745 if (!next) 1471 if (expect_false (!prev))
746 { 1472 {
747 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1473 cctx_current->idle_sp = STACKLEVEL;
748 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1474 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
749 }
750 else if (prev != next)
751 { 1475 }
1476 else if (expect_true (prev != next))
1477 {
752 coro_cctx *prev__cctx; 1478 coro_cctx *cctx_prev;
753 1479
754 if (prev->flags & CF_NEW) 1480 if (expect_false (prev->flags & CF_NEW))
755 { 1481 {
756 /* create a new empty context */ 1482 /* create a new empty/source context */
757 Newz (0, prev->cctx, 1, coro_cctx);
758 prev->cctx->inuse = 1;
759 prev->flags &= ~CF_NEW; 1483 prev->flags &= ~CF_NEW;
760 prev->flags |= CF_RUNNING; 1484 prev->flags |= CF_RUNNING;
761 } 1485 }
762 1486
763 /*TODO: must not croak here */
764 if (!prev->flags & CF_RUNNING)
765 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
766
767 if (next->flags & CF_RUNNING)
768 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
769
770 if (next->flags & CF_DESTROYED)
771 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
772
773 prev->flags &= ~CF_RUNNING; 1487 prev->flags &= ~CF_RUNNING;
774 next->flags |= CF_RUNNING; 1488 next->flags |= CF_RUNNING;
775 1489
776 LOCK; 1490 /* first get rid of the old state */
1491 save_perl (aTHX_ prev);
777 1492
778 if (next->flags & CF_NEW) 1493 if (expect_false (next->flags & CF_NEW))
779 { 1494 {
780 /* need to start coroutine */ 1495 /* need to start coroutine */
781 next->flags &= ~CF_NEW; 1496 next->flags &= ~CF_NEW;
782 /* first get rid of the old state */
783 save_perl (prev);
784 /* setup coroutine call */ 1497 /* setup coroutine call */
785 setup_coro (next); 1498 coro_setup (aTHX_ next);
786 /* need a new stack */
787 assert (!next->cctx);
788 } 1499 }
789 else 1500 else
1501 load_perl (aTHX_ next);
1502
1503 /* possibly untie and reuse the cctx */
1504 if (expect_true (
1505 cctx_current->idle_sp == STACKLEVEL
1506 && !(cctx_current->flags & CC_TRACE)
1507 && !force_cctx
1508 ))
790 { 1509 {
791 /* coroutine already started */ 1510 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
792 save_perl (prev); 1511 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
793 load_perl (next); 1512
1513 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1514 /* without this the next cctx_get might destroy the running cctx while still in use */
1515 if (expect_false (CCTX_EXPIRED (cctx_current)))
1516 if (expect_true (!next->cctx))
1517 next->cctx = cctx_get (aTHX);
1518
1519 cctx_put (cctx_current);
794 } 1520 }
1521 else
1522 prev->cctx = cctx_current;
795 1523
796 prev__cctx = prev->cctx; 1524 ++next->usecount;
797 1525
798 /* possibly "free" the cctx */ 1526 cctx_prev = cctx_current;
799 if (prev__cctx->idle_sp == STACKLEVEL) 1527 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1528
1529 next->cctx = 0;
1530
1531 if (expect_false (cctx_prev != cctx_current))
800 { 1532 {
801 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1533 cctx_prev->top_env = PL_top_env;
802 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1534 PL_top_env = cctx_current->top_env;
803 1535 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
804 prev->cctx = 0;
805
806 cctx_put (prev__cctx);
807 prev__cctx->inuse = 0;
808 } 1536 }
809 1537
810 if (!next->cctx) 1538 transfer_tail (aTHX);
811 {
812 next->cctx = cctx_get ();
813 assert (!next->cctx->inuse);
814 next->cctx->inuse = 1;
815 }
816
817 if (prev__cctx != next->cctx)
818 {
819 prev__cctx->top_env = PL_top_env;
820 PL_top_env = next->cctx->top_env;
821 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
822 }
823
824 free_coro_mortal ();
825 UNLOCK;
826 } 1539 }
827} 1540}
828 1541
829struct transfer_args 1542#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
830{
831 struct coro *prev, *next;
832};
833
834#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1543#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
835 1544
836/** high level stuff ********************************************************/ 1545/** high level stuff ********************************************************/
837 1546
838static int 1547static int
839coro_state_destroy (struct coro *coro) 1548coro_state_destroy (pTHX_ struct coro *coro)
840{ 1549{
841 if (coro->flags & CF_DESTROYED) 1550 if (coro->flags & CF_DESTROYED)
842 return 0; 1551 return 0;
1552
1553 if (coro->on_destroy && !PL_dirty)
1554 coro->on_destroy (aTHX_ coro);
843 1555
844 coro->flags |= CF_DESTROYED; 1556 coro->flags |= CF_DESTROYED;
845 1557
846 if (coro->flags & CF_READY) 1558 if (coro->flags & CF_READY)
847 { 1559 {
848 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1560 /* reduce nready, as destroying a ready coro effectively unreadies it */
849 /* alternative: look through all ready queues and remove the coro */ 1561 /* alternative: look through all ready queues and remove the coro */
850 LOCK;
851 --coro_nready; 1562 --coro_nready;
852 UNLOCK;
853 } 1563 }
854 else 1564 else
855 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1565 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
856 1566
857 if (coro->mainstack && coro->mainstack != main_mainstack) 1567 if (coro->mainstack
858 { 1568 && coro->mainstack != main_mainstack
859 struct coro temp; 1569 && coro->slot
860 1570 && !PL_dirty)
861 assert (!(coro->flags & CF_RUNNING)); 1571 coro_destruct_perl (aTHX_ coro);
862
863 Zero (&temp, 1, struct coro);
864 temp.save = CORO_SAVE_ALL;
865
866 if (coro->flags & CF_RUNNING)
867 croak ("FATAL: tried to destroy currently running coroutine");
868
869 save_perl (&temp);
870 load_perl (coro);
871
872 coro_destroy_stacks ();
873
874 load_perl (&temp); /* this will get rid of defsv etc.. */
875
876 coro->mainstack = 0;
877 }
878 1572
879 cctx_destroy (coro->cctx); 1573 cctx_destroy (coro->cctx);
1574 SvREFCNT_dec (coro->startcv);
880 SvREFCNT_dec (coro->args); 1575 SvREFCNT_dec (coro->args);
1576 SvREFCNT_dec (CORO_THROW);
1577
1578 if (coro->next) coro->next->prev = coro->prev;
1579 if (coro->prev) coro->prev->next = coro->next;
1580 if (coro == coro_first) coro_first = coro->next;
881 1581
882 return 1; 1582 return 1;
883} 1583}
884 1584
885static int 1585static int
886coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1586coro_state_free (pTHX_ SV *sv, MAGIC *mg)
887{ 1587{
888 struct coro *coro = (struct coro *)mg->mg_ptr; 1588 struct coro *coro = (struct coro *)mg->mg_ptr;
889 mg->mg_ptr = 0; 1589 mg->mg_ptr = 0;
890 1590
1591 coro->hv = 0;
1592
891 if (--coro->refcnt < 0) 1593 if (--coro->refcnt < 0)
892 { 1594 {
893 coro_state_destroy (coro); 1595 coro_state_destroy (aTHX_ coro);
894 Safefree (coro); 1596 Safefree (coro);
895 } 1597 }
896 1598
897 return 0; 1599 return 0;
898} 1600}
… …
916#else 1618#else
917# define MGf_DUP 0 1619# define MGf_DUP 0
918#endif 1620#endif
919}; 1621};
920 1622
921static struct coro *
922SvSTATE (SV *coro)
923{
924 HV *stash;
925 MAGIC *mg;
926
927 if (SvROK (coro))
928 coro = SvRV (coro);
929
930 stash = SvSTASH (coro);
931 if (stash != coro_stash && stash != coro_state_stash)
932 {
933 /* very slow, but rare, check */
934 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
935 croak ("Coro::State object required");
936 }
937
938 mg = SvMAGIC (coro);
939 assert (mg->mg_type == PERL_MAGIC_ext);
940 return (struct coro *)mg->mg_ptr;
941}
942
943static void 1623static void
944prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1624prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
945{ 1625{
946 ta->prev = SvSTATE (prev_sv); 1626 ta->prev = SvSTATE (prev_sv);
947 ta->next = SvSTATE (next_sv); 1627 ta->next = SvSTATE (next_sv);
1628 TRANSFER_CHECK (*ta);
948} 1629}
949 1630
950static void 1631static void
951api_transfer (SV *prev_sv, SV *next_sv) 1632api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
952{ 1633{
953 struct transfer_args ta; 1634 struct coro_transfer_args ta;
954 1635
955 prepare_transfer (&ta, prev_sv, next_sv); 1636 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
956 TRANSFER (ta); 1637 TRANSFER (ta, 1);
1638}
1639
1640/** Coro ********************************************************************/
1641
1642INLINE void
1643coro_enq (pTHX_ struct coro *coro)
1644{
1645 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1646
1647 SvREFCNT_inc_NN (coro->hv);
1648
1649 coro->next_ready = 0;
1650 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1651 ready [1] = coro;
1652}
1653
1654INLINE struct coro *
1655coro_deq (pTHX)
1656{
1657 int prio;
1658
1659 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1660 {
1661 struct coro **ready = coro_ready [prio];
1662
1663 if (ready [0])
1664 {
1665 struct coro *coro = ready [0];
1666 ready [0] = coro->next_ready;
1667 return coro;
1668 }
1669 }
1670
1671 return 0;
1672}
1673
1674static void
1675invoke_sv_ready_hook_helper (void)
1676{
1677 dTHX;
1678 dSP;
1679
1680 ENTER;
1681 SAVETMPS;
1682
1683 PUSHMARK (SP);
1684 PUTBACK;
1685 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1686
1687 FREETMPS;
1688 LEAVE;
957} 1689}
958 1690
959static int 1691static int
960api_save (SV *coro_sv, int new_save) 1692api_ready (pTHX_ SV *coro_sv)
961{ 1693{
962 struct coro *coro = SvSTATE (coro_sv); 1694 struct coro *coro = SvSTATE (coro_sv);
963 int old_save = coro->save;
964
965 if (new_save >= 0)
966 coro->save = new_save;
967
968 return old_save;
969}
970
971/** Coro ********************************************************************/
972
973static void
974coro_enq (SV *coro_sv)
975{
976 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
977}
978
979static SV *
980coro_deq (int min_prio)
981{
982 int prio = PRIO_MAX - PRIO_MIN;
983
984 min_prio -= PRIO_MIN;
985 if (min_prio < 0)
986 min_prio = 0;
987
988 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
989 if (AvFILLp (coro_ready [prio]) >= 0)
990 return av_shift (coro_ready [prio]);
991
992 return 0;
993}
994
995static int
996api_ready (SV *coro_sv)
997{
998 struct coro *coro;
999
1000 if (SvROK (coro_sv))
1001 coro_sv = SvRV (coro_sv);
1002
1003 coro = SvSTATE (coro_sv);
1004 1695
1005 if (coro->flags & CF_READY) 1696 if (coro->flags & CF_READY)
1006 return 0; 1697 return 0;
1007 1698
1008 coro->flags |= CF_READY; 1699 coro->flags |= CF_READY;
1009 1700
1010 LOCK; 1701 coro_enq (aTHX_ coro);
1011 coro_enq (SvREFCNT_inc (coro_sv)); 1702
1012 ++coro_nready; 1703 if (!coro_nready++)
1013 UNLOCK; 1704 if (coroapi.readyhook)
1705 coroapi.readyhook ();
1014 1706
1015 return 1; 1707 return 1;
1016} 1708}
1017 1709
1018static int 1710static int
1019api_is_ready (SV *coro_sv) 1711api_is_ready (pTHX_ SV *coro_sv)
1020{ 1712{
1021 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1713 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1022} 1714}
1023 1715
1716/* expects to own a reference to next->hv */
1717INLINE void
1718prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1719{
1720 SV *prev_sv = SvRV (coro_current);
1721
1722 ta->prev = SvSTATE_hv (prev_sv);
1723 ta->next = next;
1724
1725 TRANSFER_CHECK (*ta);
1726
1727 SvRV_set (coro_current, (SV *)next->hv);
1728
1729 free_coro_mortal (aTHX);
1730 coro_mortal = prev_sv;
1731}
1732
1024static void 1733static void
1025prepare_schedule (struct transfer_args *ta) 1734prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1026{ 1735{
1027 SV *prev_sv, *next_sv;
1028
1029 for (;;) 1736 for (;;)
1030 { 1737 {
1031 LOCK; 1738 struct coro *next = coro_deq (aTHX);
1032 next_sv = coro_deq (PRIO_MIN);
1033 1739
1740 if (expect_true (next))
1741 {
1742 /* cannot transfer to destroyed coros, skip and look for next */
1743 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1744 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1745 else
1746 {
1747 next->flags &= ~CF_READY;
1748 --coro_nready;
1749
1750 prepare_schedule_to (aTHX_ ta, next);
1751 break;
1752 }
1753 }
1754 else
1755 {
1034 /* nothing to schedule: call the idle handler */ 1756 /* nothing to schedule: call the idle handler */
1035 if (!next_sv) 1757 if (SvROK (sv_idle)
1758 && SvOBJECT (SvRV (sv_idle)))
1759 {
1760 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1761 api_ready (aTHX_ SvRV (sv_idle));
1762 --coro_nready;
1763 }
1764 else
1765 {
1766 dSP;
1767
1768 ENTER;
1769 SAVETMPS;
1770
1771 PUSHMARK (SP);
1772 PUTBACK;
1773 call_sv (sv_idle, G_VOID | G_DISCARD);
1774
1775 FREETMPS;
1776 LEAVE;
1777 }
1778 }
1779 }
1780}
1781
1782INLINE void
1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
1784{
1785 api_ready (aTHX_ coro_current);
1786 prepare_schedule (aTHX_ ta);
1787}
1788
1789INLINE void
1790prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1791{
1792 SV *prev = SvRV (coro_current);
1793
1794 if (coro_nready)
1795 {
1796 prepare_schedule (aTHX_ ta);
1797 api_ready (aTHX_ prev);
1798 }
1799 else
1800 prepare_nop (aTHX_ ta);
1801}
1802
1803static void
1804api_schedule (pTHX)
1805{
1806 struct coro_transfer_args ta;
1807
1808 prepare_schedule (aTHX_ &ta);
1809 TRANSFER (ta, 1);
1810}
1811
1812static void
1813api_schedule_to (pTHX_ SV *coro_sv)
1814{
1815 struct coro_transfer_args ta;
1816 struct coro *next = SvSTATE (coro_sv);
1817
1818 SvREFCNT_inc_NN (coro_sv);
1819 prepare_schedule_to (aTHX_ &ta, next);
1820}
1821
1822static int
1823api_cede (pTHX)
1824{
1825 struct coro_transfer_args ta;
1826
1827 prepare_cede (aTHX_ &ta);
1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
1832 return 1;
1833 }
1834 else
1835 return 0;
1836}
1837
1838static int
1839api_cede_notself (pTHX)
1840{
1841 if (coro_nready)
1842 {
1843 struct coro_transfer_args ta;
1844
1845 prepare_cede_notself (aTHX_ &ta);
1846 TRANSFER (ta, 1);
1847 return 1;
1848 }
1849 else
1850 return 0;
1851}
1852
1853static void
1854api_trace (pTHX_ SV *coro_sv, int flags)
1855{
1856 struct coro *coro = SvSTATE (coro_sv);
1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1861 if (flags & CC_TRACE)
1862 {
1863 if (!coro->cctx)
1864 coro->cctx = cctx_new_run ();
1865 else if (!(coro->cctx->flags & CC_TRACE))
1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1867
1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1869 }
1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1871 {
1872 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1873
1874 if (coro->flags & CF_RUNNING)
1875 PL_runops = RUNOPS_DEFAULT;
1876 else
1877 coro->slot->runops = RUNOPS_DEFAULT;
1878 }
1879}
1880
1881static void
1882coro_call_on_destroy (pTHX_ struct coro *coro)
1883{
1884 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1885 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1886
1887 if (on_destroyp)
1888 {
1889 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1890
1891 while (AvFILLp (on_destroy) >= 0)
1892 {
1893 dSP; /* don't disturb outer sp */
1894 SV *cb = av_pop (on_destroy);
1895
1896 PUSHMARK (SP);
1897
1898 if (statusp)
1899 {
1900 int i;
1901 AV *status = (AV *)SvRV (*statusp);
1902 EXTEND (SP, AvFILLp (status) + 1);
1903
1904 for (i = 0; i <= AvFILLp (status); ++i)
1905 PUSHs (AvARRAY (status)[i]);
1906 }
1907
1908 PUTBACK;
1909 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1910 }
1911 }
1912}
1913
1914static void
1915slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1916{
1917 int i;
1918 HV *hv = (HV *)SvRV (coro_current);
1919 AV *av = newAV ();
1920
1921 /* items are actually not so common, so optimise for this case */
1922 if (items)
1923 {
1924 av_extend (av, items - 1);
1925
1926 for (i = 0; i < items; ++i)
1927 av_push (av, SvREFCNT_inc_NN (arg [i]));
1928 }
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
1945
1946static int
1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1948{
1949 HV *hv = (HV *)SvRV (coro_current);
1950 struct coro *coro = (struct coro *)frame->data;
1951
1952 if (!coro->invoke_cb)
1953 return 1; /* loop till we have invoke */
1954 else
1955 {
1956 hv_store (hv, "desc", sizeof ("desc") - 1,
1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1958
1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1960
1961 {
1962 dSP;
1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1964 PUTBACK;
1965 }
1966
1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
1986
1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
1992
1993 frame->prepare = prepare_nop;
1994 }
1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1999
2000 coro->prio = 0;
2001
2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2003 api_trace (aTHX_ coro_current, 0);
2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)S_GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
2076
2077 return 0;
2078}
2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2105 SV *data = (SV *)S_GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
2111}
2112
2113static SV *
2114coro_new_rouse_cb (pTHX)
2115{
2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2120
2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2122 SvREFCNT_dec (data); /* magicext increases the refcount */
2123
2124 SvREFCNT_dec (coro->rouse_cb);
2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2188{
2189 struct coro *next = (struct coro *)slf_frame.data;
2190
2191 SvREFCNT_inc_NN (next->hv);
2192 prepare_schedule_to (aTHX_ ta, next);
2193}
2194
2195static void
2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
2258 {
2259 /* ampersand-form of call, use @_ instead of stack */
2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
2281 struct coro_transfer_args ta;
2282
2283 slf_frame.prepare (aTHX_ &ta);
2284 TRANSFER (ta, 0);
2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2337 slf_cv = cv;
2338
2339 /* we patch the op, and then re-run the whole call */
2340 /* we have to put the same argument on the stack for this to work */
2341 /* and this will be done by pp_restore */
2342 slf_restore.op_next = (OP *)&slf_restore;
2343 slf_restore.op_type = OP_CUSTOM;
2344 slf_restore.op_ppaddr = pp_restore;
2345 slf_restore.op_first = PL_op;
2346
2347 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2348
2349 if (PL_op->op_flags & OPf_STACKED)
2350 {
2351 if (items > slf_arga)
2352 {
2353 slf_arga = items;
2354 free (slf_argv);
2355 slf_argv = malloc (slf_arga * sizeof (SV *));
2356 }
2357
2358 slf_argc = items;
2359
2360 for (i = 0; i < items; ++i)
2361 slf_argv [i] = SvREFCNT_inc (arg [i]);
2362 }
2363 else
2364 slf_argc = 0;
2365
2366 PL_op->op_ppaddr = pp_slf;
2367 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2368
2369 PL_op = (OP *)&slf_restore;
2370}
2371
2372/*****************************************************************************/
2373/* dynamic wind */
2374
2375static void
2376on_enterleave_call (pTHX_ SV *cb)
2377{
2378 dSP;
2379
2380 PUSHSTACK;
2381
2382 PUSHMARK (SP);
2383 PUTBACK;
2384 call_sv (cb, G_VOID | G_DISCARD);
2385 SPAGAIN;
2386
2387 POPSTACK;
2388}
2389
2390static SV *
2391coro_avp_pop_and_free (pTHX_ AV **avp)
2392{
2393 AV *av = *avp;
2394 SV *res = av_pop (av);
2395
2396 if (AvFILLp (av) < 0)
2397 {
2398 *avp = 0;
2399 SvREFCNT_dec (av);
2400 }
2401
2402 return res;
2403}
2404
2405static void
2406coro_pop_on_enter (pTHX_ void *coro)
2407{
2408 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2409 SvREFCNT_dec (cb);
2410}
2411
2412static void
2413coro_pop_on_leave (pTHX_ void *coro)
2414{
2415 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2416 on_enterleave_call (aTHX_ sv_2mortal (cb));
2417}
2418
2419/*****************************************************************************/
2420/* PerlIO::cede */
2421
2422typedef struct
2423{
2424 PerlIOBuf base;
2425 NV next, every;
2426} PerlIOCede;
2427
2428static IV
2429PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2430{
2431 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2432
2433 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2434 self->next = nvtime () + self->every;
2435
2436 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2437}
2438
2439static SV *
2440PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2441{
2442 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2443
2444 return newSVnv (self->every);
2445}
2446
2447static IV
2448PerlIOCede_flush (pTHX_ PerlIO *f)
2449{
2450 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2451 double now = nvtime ();
2452
2453 if (now >= self->next)
2454 {
2455 api_cede (aTHX);
2456 self->next = now + self->every;
2457 }
2458
2459 return PerlIOBuf_flush (aTHX_ f);
2460}
2461
2462static PerlIO_funcs PerlIO_cede =
2463{
2464 sizeof(PerlIO_funcs),
2465 "cede",
2466 sizeof(PerlIOCede),
2467 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2468 PerlIOCede_pushed,
2469 PerlIOBuf_popped,
2470 PerlIOBuf_open,
2471 PerlIOBase_binmode,
2472 PerlIOCede_getarg,
2473 PerlIOBase_fileno,
2474 PerlIOBuf_dup,
2475 PerlIOBuf_read,
2476 PerlIOBuf_unread,
2477 PerlIOBuf_write,
2478 PerlIOBuf_seek,
2479 PerlIOBuf_tell,
2480 PerlIOBuf_close,
2481 PerlIOCede_flush,
2482 PerlIOBuf_fill,
2483 PerlIOBase_eof,
2484 PerlIOBase_error,
2485 PerlIOBase_clearerr,
2486 PerlIOBase_setlinebuf,
2487 PerlIOBuf_get_base,
2488 PerlIOBuf_bufsiz,
2489 PerlIOBuf_get_ptr,
2490 PerlIOBuf_get_cnt,
2491 PerlIOBuf_set_ptrcnt,
2492};
2493
2494/*****************************************************************************/
2495/* Coro::Semaphore & Coro::Signal */
2496
2497static SV *
2498coro_waitarray_new (pTHX_ int count)
2499{
2500 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2501 AV *av = newAV ();
2502 SV **ary;
2503
2504 /* unfortunately, building manually saves memory */
2505 Newx (ary, 2, SV *);
2506 AvALLOC (av) = ary;
2507#if PERL_VERSION_ATLEAST (5,10,0)
2508 AvARRAY (av) = ary;
2509#else
2510 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2511 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2512 SvPVX ((SV *)av) = (char *)ary;
2513#endif
2514 AvMAX (av) = 1;
2515 AvFILLp (av) = 0;
2516 ary [0] = newSViv (count);
2517
2518 return newRV_noinc ((SV *)av);
2519}
2520
2521/* semaphore */
2522
2523static void
2524coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2525{
2526 SV *count_sv = AvARRAY (av)[0];
2527 IV count = SvIVX (count_sv);
2528
2529 count += adjust;
2530 SvIVX (count_sv) = count;
2531
2532 /* now wake up as many waiters as are expected to lock */
2533 while (count > 0 && AvFILLp (av) > 0)
2534 {
2535 SV *cb;
2536
2537 /* swap first two elements so we can shift a waiter */
2538 AvARRAY (av)[0] = AvARRAY (av)[1];
2539 AvARRAY (av)[1] = count_sv;
2540 cb = av_shift (av);
2541
2542 if (SvOBJECT (cb))
2543 {
2544 api_ready (aTHX_ cb);
2545 --count;
2546 }
2547 else if (SvTYPE (cb) == SVt_PVCV)
1036 { 2548 {
1037 dSP; 2549 dSP;
1038 UNLOCK;
1039
1040 ENTER;
1041 SAVETMPS;
1042
1043 PUSHMARK (SP); 2550 PUSHMARK (SP);
2551 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1044 PUTBACK; 2552 PUTBACK;
1045 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2553 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1046
1047 FREETMPS;
1048 LEAVE;
1049 continue;
1050 } 2554 }
1051 2555
1052 ta->next = SvSTATE (next_sv); 2556 SvREFCNT_dec (cb);
2557 }
2558}
1053 2559
1054 /* cannot transfer to destroyed coros, skip and look for next */ 2560static void
1055 if (ta->next->flags & CF_DESTROYED) 2561coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2562{
2563 /* call $sem->adjust (0) to possibly wake up some other waiters */
2564 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2565}
2566
2567static int
2568slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2569{
2570 AV *av = (AV *)frame->data;
2571 SV *count_sv = AvARRAY (av)[0];
2572
2573 /* if we are about to throw, don't actually acquire the lock, just throw */
2574 if (CORO_THROW)
2575 return 0;
2576 else if (SvIVX (count_sv) > 0)
2577 {
2578 SvSTATE_current->on_destroy = 0;
2579
2580 if (acquire)
2581 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2582 else
2583 coro_semaphore_adjust (aTHX_ av, 0);
2584
2585 return 0;
2586 }
2587 else
2588 {
2589 int i;
2590 /* if we were woken up but can't down, we look through the whole */
2591 /* waiters list and only add us if we aren't in there already */
2592 /* this avoids some degenerate memory usage cases */
2593
2594 for (i = 1; i <= AvFILLp (av); ++i)
2595 if (AvARRAY (av)[i] == SvRV (coro_current))
2596 return 1;
2597
2598 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2599 return 1;
2600 }
2601}
2602
2603static int
2604slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2607}
2608
2609static int
2610slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2611{
2612 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2613}
2614
2615static void
2616slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2617{
2618 AV *av = (AV *)SvRV (arg [0]);
2619
2620 if (SvIVX (AvARRAY (av)[0]) > 0)
2621 {
2622 frame->data = (void *)av;
2623 frame->prepare = prepare_nop;
2624 }
2625 else
2626 {
2627 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2628
2629 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2630 frame->prepare = prepare_schedule;
2631
2632 /* to avoid race conditions when a woken-up coro gets terminated */
2633 /* we arrange for a temporary on_destroy that calls adjust (0) */
2634 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2635 }
2636}
2637
2638static void
2639slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2642 frame->check = slf_check_semaphore_down;
2643}
2644
2645static void
2646slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2647{
2648 if (items >= 2)
2649 {
2650 /* callback form */
2651 AV *av = (AV *)SvRV (arg [0]);
2652 SV *cb_cv = s_get_cv_croak (arg [1]);
2653
2654 av_push (av, SvREFCNT_inc_NN (cb_cv));
2655
2656 if (SvIVX (AvARRAY (av)[0]) > 0)
2657 coro_semaphore_adjust (aTHX_ av, 0);
2658
2659 frame->prepare = prepare_nop;
2660 frame->check = slf_check_nop;
2661 }
2662 else
2663 {
2664 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2665 frame->check = slf_check_semaphore_wait;
2666 }
2667}
2668
2669/* signal */
2670
2671static void
2672coro_signal_wake (pTHX_ AV *av, int count)
2673{
2674 SvIVX (AvARRAY (av)[0]) = 0;
2675
2676 /* now signal count waiters */
2677 while (count > 0 && AvFILLp (av) > 0)
2678 {
2679 SV *cb;
2680
2681 /* swap first two elements so we can shift a waiter */
2682 cb = AvARRAY (av)[0];
2683 AvARRAY (av)[0] = AvARRAY (av)[1];
2684 AvARRAY (av)[1] = cb;
2685
2686 cb = av_shift (av);
2687
2688 if (SvTYPE (cb) == SVt_PVCV)
1056 { 2689 {
2690 dSP;
2691 PUSHMARK (SP);
2692 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1057 UNLOCK; 2693 PUTBACK;
1058 SvREFCNT_dec (next_sv); 2694 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1059 /* coro_nready is already taken care of by destroy */
1060 continue;
1061 } 2695 }
2696 else
2697 {
2698 api_ready (aTHX_ cb);
2699 sv_setiv (cb, 0); /* signal waiter */
2700 }
1062 2701
1063 --coro_nready; 2702 SvREFCNT_dec (cb);
1064 UNLOCK;
1065 break;
1066 }
1067 2703
1068 /* free this only after the transfer */ 2704 --count;
1069 prev_sv = SvRV (coro_current); 2705 }
1070 SvRV_set (coro_current, next_sv);
1071 ta->prev = SvSTATE (prev_sv);
1072
1073 assert (ta->next->flags & CF_READY);
1074 ta->next->flags &= ~CF_READY;
1075
1076 LOCK;
1077 free_coro_mortal ();
1078 coro_mortal = prev_sv;
1079 UNLOCK;
1080}
1081
1082static void
1083prepare_cede (struct transfer_args *ta)
1084{
1085 api_ready (coro_current);
1086 prepare_schedule (ta);
1087} 2706}
1088 2707
1089static int 2708static int
1090prepare_cede_notself (struct transfer_args *ta) 2709slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1091{ 2710{
1092 if (coro_nready) 2711 /* if we are about to throw, also stop waiting */
2712 return SvROK ((SV *)frame->data) && !CORO_THROW;
2713}
2714
2715static void
2716slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2717{
2718 AV *av = (AV *)SvRV (arg [0]);
2719
2720 if (items >= 2)
2721 {
2722 SV *cb_cv = s_get_cv_croak (arg [1]);
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]))
2726 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
1093 { 2730 }
1094 SV *prev = SvRV (coro_current); 2731 else if (SvIVX (AvARRAY (av)[0]))
1095 prepare_schedule (ta); 2732 {
1096 api_ready (prev); 2733 SvIVX (AvARRAY (av)[0]) = 0;
1097 return 1; 2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
1098 } 2736 }
1099 else 2737 else
2738 {
2739 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2740
2741 av_push (av, waiter);
2742
2743 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2744 frame->prepare = prepare_schedule;
2745 frame->check = slf_check_signal_wait;
2746 }
2747}
2748
2749/*****************************************************************************/
2750/* Coro::AIO */
2751
2752#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2753
2754/* helper storage struct */
2755struct io_state
2756{
2757 int errorno;
2758 I32 laststype; /* U16 in 5.10.0 */
2759 int laststatval;
2760 Stat_t statcache;
2761};
2762
2763static void
2764coro_aio_callback (pTHX_ CV *cv)
2765{
2766 dXSARGS;
2767 AV *state = (AV *)S_GENSUB_ARG;
2768 SV *coro = av_pop (state);
2769 SV *data_sv = newSV (sizeof (struct io_state));
2770
2771 av_extend (state, items - 1);
2772
2773 sv_upgrade (data_sv, SVt_PV);
2774 SvCUR_set (data_sv, sizeof (struct io_state));
2775 SvPOK_only (data_sv);
2776
2777 {
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 data->errorno = errno;
2781 data->laststype = PL_laststype;
2782 data->laststatval = PL_laststatval;
2783 data->statcache = PL_statcache;
2784 }
2785
2786 /* now build the result vector out of all the parameters and the data_sv */
2787 {
2788 int i;
2789
2790 for (i = 0; i < items; ++i)
2791 av_push (state, SvREFCNT_inc_NN (ST (i)));
2792 }
2793
2794 av_push (state, data_sv);
2795
2796 api_ready (aTHX_ coro);
2797 SvREFCNT_dec (coro);
2798 SvREFCNT_dec ((AV *)state);
2799}
2800
2801static int
2802slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2803{
2804 AV *state = (AV *)frame->data;
2805
2806 /* if we are about to throw, return early */
2807 /* this does not cancel the aio request, but at least */
2808 /* it quickly returns */
2809 if (CORO_THROW)
1100 return 0; 2810 return 0;
1101}
1102 2811
1103static void 2812 /* one element that is an RV? repeat! */
1104api_schedule (void) 2813 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1105{
1106 struct transfer_args ta;
1107
1108 prepare_schedule (&ta);
1109 TRANSFER (ta);
1110}
1111
1112static int
1113api_cede (void)
1114{
1115 struct transfer_args ta;
1116
1117 prepare_cede (&ta);
1118
1119 if (ta.prev != ta.next)
1120 {
1121 TRANSFER (ta);
1122 return 1; 2814 return 1;
2815
2816 /* restore status */
2817 {
2818 SV *data_sv = av_pop (state);
2819 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2820
2821 errno = data->errorno;
2822 PL_laststype = data->laststype;
2823 PL_laststatval = data->laststatval;
2824 PL_statcache = data->statcache;
2825
2826 SvREFCNT_dec (data_sv);
1123 } 2827 }
1124 else 2828
2829 /* push result values */
2830 {
2831 dSP;
2832 int i;
2833
2834 EXTEND (SP, AvFILLp (state) + 1);
2835 for (i = 0; i <= AvFILLp (state); ++i)
2836 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2837
2838 PUTBACK;
2839 }
2840
1125 return 0; 2841 return 0;
1126} 2842}
1127 2843
1128static int 2844static void
1129api_cede_notself (void) 2845slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1130{ 2846{
1131 struct transfer_args ta; 2847 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2848 SV *coro_hv = SvRV (coro_current);
2849 struct coro *coro = SvSTATE_hv (coro_hv);
1132 2850
1133 if (prepare_cede_notself (&ta)) 2851 /* put our coroutine id on the state arg */
1134 { 2852 av_push (state, SvREFCNT_inc_NN (coro_hv));
1135 TRANSFER (ta); 2853
1136 return 1; 2854 /* first see whether we have a non-zero priority and set it as AIO prio */
2855 if (coro->prio)
1137 } 2856 {
1138 else 2857 dSP;
1139 return 0;
1140}
1141 2858
2859 static SV *prio_cv;
2860 static SV *prio_sv;
2861
2862 if (expect_false (!prio_cv))
2863 {
2864 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2865 prio_sv = newSViv (0);
2866 }
2867
2868 PUSHMARK (SP);
2869 sv_setiv (prio_sv, coro->prio);
2870 XPUSHs (prio_sv);
2871
2872 PUTBACK;
2873 call_sv (prio_cv, G_VOID | G_DISCARD);
2874 }
2875
2876 /* now call the original request */
2877 {
2878 dSP;
2879 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2880 int i;
2881
2882 PUSHMARK (SP);
2883
2884 /* first push all args to the stack */
2885 EXTEND (SP, items + 1);
2886
2887 for (i = 0; i < items; ++i)
2888 PUSHs (arg [i]);
2889
2890 /* now push the callback closure */
2891 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2892
2893 /* now call the AIO function - we assume our request is uncancelable */
2894 PUTBACK;
2895 call_sv ((SV *)req, G_VOID | G_DISCARD);
2896 }
2897
2898 /* now that the requets is going, we loop toll we have a result */
2899 frame->data = (void *)state;
2900 frame->prepare = prepare_schedule;
2901 frame->check = slf_check_aio_req;
2902}
2903
2904static void
2905coro_aio_req_xs (pTHX_ CV *cv)
2906{
2907 dXSARGS;
2908
2909 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2910
2911 XSRETURN_EMPTY;
2912}
2913
2914/*****************************************************************************/
2915
2916#if CORO_CLONE
2917# include "clone.c"
2918#endif
2919
2920/*****************************************************************************/
2921
2922static SV *
2923coro_new (HV *stash, SV **argv, int argc, int is_coro)
2924{
2925 SV *coro_sv;
2926 struct coro *coro;
2927 MAGIC *mg;
2928 HV *hv;
2929 SV *cb;
2930 int i;
2931
2932 if (argc > 0)
2933 {
2934 cb = s_get_cv_croak (argv [0]);
2935
2936 if (!is_coro)
2937 {
2938 if (CvISXSUB (cb))
2939 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2940
2941 if (!CvROOT (cb))
2942 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2943 }
2944 }
2945
2946 Newz (0, coro, 1, struct coro);
2947 coro->args = newAV ();
2948 coro->flags = CF_NEW;
2949
2950 if (coro_first) coro_first->prev = coro;
2951 coro->next = coro_first;
2952 coro_first = coro;
2953
2954 coro->hv = hv = newHV ();
2955 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2956 mg->mg_flags |= MGf_DUP;
2957 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2958
2959 if (argc > 0)
2960 {
2961 av_extend (coro->args, argc + is_coro - 1);
2962
2963 if (is_coro)
2964 {
2965 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2966 cb = (SV *)cv_coro_run;
2967 }
2968
2969 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2970
2971 for (i = 1; i < argc; i++)
2972 av_push (coro->args, newSVsv (argv [i]));
2973 }
2974
2975 return coro_sv;
2976}
2977
1142MODULE = Coro::State PACKAGE = Coro::State 2978MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1143 2979
1144PROTOTYPES: DISABLE 2980PROTOTYPES: DISABLE
1145 2981
1146BOOT: 2982BOOT:
1147{ 2983{
1148#ifdef USE_ITHREADS 2984#ifdef USE_ITHREADS
1149 MUTEX_INIT (&coro_mutex); 2985# if CORO_PTHREAD
2986 coro_thx = PERL_GET_CONTEXT;
2987# endif
1150#endif 2988#endif
1151 BOOT_PAGESIZE; 2989 BOOT_PAGESIZE;
1152 2990
2991 cctx_current = cctx_new_empty ();
2992
2993 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2994 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2995
2996 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2997 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2998 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2999
3000 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3001 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3002 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3003
1153 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3004 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1154 3005
3006 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3007 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1155 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3008 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1156 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1157 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1158 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1159 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3009 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1160 3010
1161 main_mainstack = PL_mainstack; 3011 main_mainstack = PL_mainstack;
3012 main_top_env = PL_top_env;
1162 3013
3014 while (main_top_env->je_prev)
3015 main_top_env = main_top_env->je_prev;
3016
3017 {
3018 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3019
3020 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3021 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3022
3023 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3024 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3025 }
3026
1163 coroapi.ver = CORO_API_VERSION; 3027 coroapi.ver = CORO_API_VERSION;
3028 coroapi.rev = CORO_API_REVISION;
3029
1164 coroapi.transfer = api_transfer; 3030 coroapi.transfer = api_transfer;
1165 3031
3032 coroapi.sv_state = SvSTATE_;
3033 coroapi.execute_slf = api_execute_slf;
3034 coroapi.prepare_nop = prepare_nop;
3035 coroapi.prepare_schedule = prepare_schedule;
3036 coroapi.prepare_cede = prepare_cede;
3037 coroapi.prepare_cede_notself = prepare_cede_notself;
3038
3039 {
3040 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3041
3042 if (!svp) croak ("Time::HiRes is required");
3043 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3044
3045 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3046
3047 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3048 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3049 }
3050
1166 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3051 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1167} 3052}
1168 3053
1169SV * 3054SV *
1170new (char *klass, ...) 3055new (SV *klass, ...)
3056 ALIAS:
3057 Coro::new = 1
1171 CODE: 3058 CODE:
1172{ 3059 RETVAL = coro_new (ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1173 struct coro *coro;
1174 HV *hv;
1175 int i;
1176
1177 Newz (0, coro, 1, struct coro);
1178 coro->args = newAV ();
1179 coro->save = CORO_SAVE_ALL;
1180 coro->flags = CF_NEW;
1181
1182 hv = newHV ();
1183 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1184 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1185
1186 for (i = 1; i < items; i++)
1187 av_push (coro->args, newSVsv (ST (i)));
1188}
1189 OUTPUT:
1190 RETVAL
1191
1192int
1193save (SV *coro, int new_save = -1)
1194 CODE:
1195 RETVAL = api_save (coro, new_save);
1196 OUTPUT: 3060 OUTPUT:
1197 RETVAL 3061 RETVAL
1198 3062
1199void 3063void
1200_set_stacklevel (...) 3064transfer (...)
1201 ALIAS: 3065 PROTOTYPE: $$
1202 Coro::State::transfer = 1 3066 CODE:
1203 Coro::schedule = 2 3067 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1204 Coro::cede = 3
1205 Coro::cede_notself = 4
1206 CODE:
1207{
1208 struct transfer_args ta;
1209
1210 switch (ix)
1211 {
1212 case 0:
1213 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1214 ta.next = 0;
1215 break;
1216
1217 case 1:
1218 if (items != 2)
1219 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1220
1221 prepare_transfer (&ta, ST (0), ST (1));
1222 break;
1223
1224 case 2:
1225 prepare_schedule (&ta);
1226 break;
1227
1228 case 3:
1229 prepare_cede (&ta);
1230 break;
1231
1232 case 4:
1233 if (!prepare_cede_notself (&ta))
1234 XSRETURN_EMPTY;
1235
1236 break;
1237 }
1238
1239 BARRIER;
1240 TRANSFER (ta);
1241
1242 if (GIMME_V != G_VOID && ta.next != ta.prev)
1243 XSRETURN_YES;
1244}
1245 3068
1246bool 3069bool
1247_destroy (SV *coro_sv) 3070_destroy (SV *coro_sv)
1248 CODE: 3071 CODE:
1249 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 3072 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1250 OUTPUT: 3073 OUTPUT:
1251 RETVAL 3074 RETVAL
1252 3075
1253void 3076void
1254_exit (code) 3077_exit (int code)
1255 int code
1256 PROTOTYPE: $ 3078 PROTOTYPE: $
1257 CODE: 3079 CODE:
1258 _exit (code); 3080 _exit (code);
1259 3081
3082SV *
3083clone (Coro::State coro)
3084 CODE:
3085{
3086#if CORO_CLONE
3087 struct coro *ncoro = coro_clone (aTHX_ coro);
3088 MAGIC *mg;
3089 /* TODO: too much duplication */
3090 ncoro->hv = newHV ();
3091 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3092 mg->mg_flags |= MGf_DUP;
3093 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3094#else
3095 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3096#endif
3097}
3098 OUTPUT:
3099 RETVAL
3100
3101int
3102cctx_stacksize (int new_stacksize = 0)
3103 PROTOTYPE: ;$
3104 CODE:
3105 RETVAL = cctx_stacksize;
3106 if (new_stacksize)
3107 {
3108 cctx_stacksize = new_stacksize;
3109 ++cctx_gen;
3110 }
3111 OUTPUT:
3112 RETVAL
3113
3114int
3115cctx_max_idle (int max_idle = 0)
3116 PROTOTYPE: ;$
3117 CODE:
3118 RETVAL = cctx_max_idle;
3119 if (max_idle > 1)
3120 cctx_max_idle = max_idle;
3121 OUTPUT:
3122 RETVAL
3123
1260int 3124int
1261cctx_count () 3125cctx_count ()
3126 PROTOTYPE:
1262 CODE: 3127 CODE:
1263 RETVAL = cctx_count; 3128 RETVAL = cctx_count;
1264 OUTPUT: 3129 OUTPUT:
1265 RETVAL 3130 RETVAL
1266 3131
1267int 3132int
1268cctx_idle () 3133cctx_idle ()
3134 PROTOTYPE:
1269 CODE: 3135 CODE:
1270 RETVAL = cctx_idle; 3136 RETVAL = cctx_idle;
1271 OUTPUT: 3137 OUTPUT:
1272 RETVAL 3138 RETVAL
1273 3139
3140void
3141list ()
3142 PROTOTYPE:
3143 PPCODE:
3144{
3145 struct coro *coro;
3146 for (coro = coro_first; coro; coro = coro->next)
3147 if (coro->hv)
3148 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3149}
3150
3151void
3152call (Coro::State coro, SV *coderef)
3153 ALIAS:
3154 eval = 1
3155 CODE:
3156{
3157 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3158 {
3159 struct coro *current = SvSTATE_current;
3160
3161 if (current != coro)
3162 {
3163 PUTBACK;
3164 save_perl (aTHX_ current);
3165 load_perl (aTHX_ coro);
3166 SPAGAIN;
3167 }
3168
3169 PUSHSTACK;
3170
3171 PUSHMARK (SP);
3172 PUTBACK;
3173
3174 if (ix)
3175 eval_sv (coderef, 0);
3176 else
3177 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3178
3179 POPSTACK;
3180 SPAGAIN;
3181
3182 if (current != coro)
3183 {
3184 PUTBACK;
3185 save_perl (aTHX_ coro);
3186 load_perl (aTHX_ current);
3187 SPAGAIN;
3188 }
3189 }
3190}
3191
3192SV *
3193is_ready (Coro::State coro)
3194 PROTOTYPE: $
3195 ALIAS:
3196 is_ready = CF_READY
3197 is_running = CF_RUNNING
3198 is_new = CF_NEW
3199 is_destroyed = CF_DESTROYED
3200 is_suspended = CF_SUSPENDED
3201 CODE:
3202 RETVAL = boolSV (coro->flags & ix);
3203 OUTPUT:
3204 RETVAL
3205
3206void
3207throw (Coro::State self, SV *throw = &PL_sv_undef)
3208 PROTOTYPE: $;$
3209 CODE:
3210{
3211 struct coro *current = SvSTATE_current;
3212 SV **throwp = self == current ? &CORO_THROW : &self->except;
3213 SvREFCNT_dec (*throwp);
3214 SvGETMAGIC (throw);
3215 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3216}
3217
3218void
3219api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3220 PROTOTYPE: $;$
3221 C_ARGS: aTHX_ coro, flags
3222
3223SV *
3224has_cctx (Coro::State coro)
3225 PROTOTYPE: $
3226 CODE:
3227 /* maybe manage the running flag differently */
3228 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3229 OUTPUT:
3230 RETVAL
3231
3232int
3233is_traced (Coro::State coro)
3234 PROTOTYPE: $
3235 CODE:
3236 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3237 OUTPUT:
3238 RETVAL
3239
3240UV
3241rss (Coro::State coro)
3242 PROTOTYPE: $
3243 ALIAS:
3244 usecount = 1
3245 CODE:
3246 switch (ix)
3247 {
3248 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3249 case 1: RETVAL = coro->usecount; break;
3250 }
3251 OUTPUT:
3252 RETVAL
3253
3254void
3255force_cctx ()
3256 PROTOTYPE:
3257 CODE:
3258 cctx_current->idle_sp = 0;
3259
3260void
3261swap_defsv (Coro::State self)
3262 PROTOTYPE: $
3263 ALIAS:
3264 swap_defav = 1
3265 CODE:
3266 if (!self->slot)
3267 croak ("cannot swap state with coroutine that has no saved state,");
3268 else
3269 {
3270 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3271 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3272
3273 SV *tmp = *src; *src = *dst; *dst = tmp;
3274 }
3275
3276void
3277cancel (Coro::State self)
3278 CODE:
3279 coro_state_destroy (aTHX_ self);
3280 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3281
3282
3283SV *
3284enable_times (int enabled = enable_times)
3285 CODE:
3286{
3287 RETVAL = boolSV (enable_times);
3288
3289 if (enabled != enable_times)
3290 {
3291 enable_times = enabled;
3292
3293 coro_times_update ();
3294 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3295 }
3296}
3297 OUTPUT:
3298 RETVAL
3299
3300void
3301times (Coro::State self)
3302 PPCODE:
3303{
3304 struct coro *current = SvSTATE (coro_current);
3305
3306 if (expect_false (current == self))
3307 {
3308 coro_times_update ();
3309 coro_times_add (SvSTATE (coro_current));
3310 }
3311
3312 EXTEND (SP, 2);
3313 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3314 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3315
3316 if (expect_false (current == self))
3317 coro_times_sub (SvSTATE (coro_current));
3318}
3319
1274MODULE = Coro::State PACKAGE = Coro 3320MODULE = Coro::State PACKAGE = Coro
1275 3321
1276BOOT: 3322BOOT:
1277{ 3323{
1278 int i; 3324 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3325 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3326 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3327 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3328 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3329 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3330 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3331 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3332 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1279 3333
3334 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3335 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3336 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3337 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3338
1280 coro_stash = gv_stashpv ("Coro", TRUE); 3339 coro_stash = gv_stashpv ("Coro", TRUE);
1281 3340
1282 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3341 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1283 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3342 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1284 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3343 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1285 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3344 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1286 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3345 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1287 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3346 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1288
1289 coro_current = get_sv ("Coro::current", FALSE);
1290 SvREADONLY_on (coro_current);
1291
1292 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1293 coro_ready[i] = newAV ();
1294 3347
1295 { 3348 {
1296 SV *sv = perl_get_sv("Coro::API", 1); 3349 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1297 3350
1298 coroapi.schedule = api_schedule; 3351 coroapi.schedule = api_schedule;
1299 coroapi.save = api_save; 3352 coroapi.schedule_to = api_schedule_to;
1300 coroapi.cede = api_cede; 3353 coroapi.cede = api_cede;
1301 coroapi.cede_notself = api_cede_notself; 3354 coroapi.cede_notself = api_cede_notself;
1302 coroapi.ready = api_ready; 3355 coroapi.ready = api_ready;
1303 coroapi.is_ready = api_is_ready; 3356 coroapi.is_ready = api_is_ready;
1304 coroapi.nready = &coro_nready; 3357 coroapi.nready = coro_nready;
1305 coroapi.current = coro_current; 3358 coroapi.current = coro_current;
1306 3359
1307 GCoroAPI = &coroapi; 3360 /*GCoroAPI = &coroapi;*/
1308 sv_setiv (sv, (IV)&coroapi); 3361 sv_setiv (sv, (IV)&coroapi);
1309 SvREADONLY_on (sv); 3362 SvREADONLY_on (sv);
1310 } 3363 }
1311} 3364}
3365
3366SV *
3367async (...)
3368 PROTOTYPE: &@
3369 CODE:
3370 RETVAL = coro_new (coro_stash, &ST (0), items, 1);
3371 api_ready (RETVAL);
3372 OUTPUT:
3373 RETVAL
3374
3375void
3376terminate (...)
3377 CODE:
3378 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3379
3380void
3381schedule (...)
3382 CODE:
3383 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3384
3385void
3386schedule_to (...)
3387 CODE:
3388 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3389
3390void
3391cede_to (...)
3392 CODE:
3393 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3394
3395void
3396cede (...)
3397 CODE:
3398 CORO_EXECUTE_SLF_XS (slf_init_cede);
3399
3400void
3401cede_notself (...)
3402 CODE:
3403 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1312 3404
1313void 3405void
1314_set_current (SV *current) 3406_set_current (SV *current)
1315 PROTOTYPE: $ 3407 PROTOTYPE: $
1316 CODE: 3408 CODE:
1317 SvREFCNT_dec (SvRV (coro_current)); 3409 SvREFCNT_dec (SvRV (coro_current));
1318 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3410 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3411
3412void
3413_set_readyhook (SV *hook)
3414 PROTOTYPE: $
3415 CODE:
3416 SvREFCNT_dec (coro_readyhook);
3417 SvGETMAGIC (hook);
3418 if (SvOK (hook))
3419 {
3420 coro_readyhook = newSVsv (hook);
3421 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3422 }
3423 else
3424 {
3425 coro_readyhook = 0;
3426 CORO_READYHOOK = 0;
3427 }
1319 3428
1320int 3429int
1321prio (Coro::State coro, int newprio = 0) 3430prio (Coro::State coro, int newprio = 0)
3431 PROTOTYPE: $;$
1322 ALIAS: 3432 ALIAS:
1323 nice = 1 3433 nice = 1
1324 CODE: 3434 CODE:
1325{ 3435{
1326 RETVAL = coro->prio; 3436 RETVAL = coro->prio;
… …
1328 if (items > 1) 3438 if (items > 1)
1329 { 3439 {
1330 if (ix) 3440 if (ix)
1331 newprio = coro->prio - newprio; 3441 newprio = coro->prio - newprio;
1332 3442
1333 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3443 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1334 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3444 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1335 3445
1336 coro->prio = newprio; 3446 coro->prio = newprio;
1337 } 3447 }
1338} 3448}
1339 OUTPUT: 3449 OUTPUT:
… …
1341 3451
1342SV * 3452SV *
1343ready (SV *self) 3453ready (SV *self)
1344 PROTOTYPE: $ 3454 PROTOTYPE: $
1345 CODE: 3455 CODE:
1346 RETVAL = boolSV (api_ready (self)); 3456 RETVAL = boolSV (api_ready (aTHX_ self));
1347 OUTPUT:
1348 RETVAL
1349
1350SV *
1351is_ready (SV *self)
1352 PROTOTYPE: $
1353 CODE:
1354 RETVAL = boolSV (api_is_ready (self));
1355 OUTPUT: 3457 OUTPUT:
1356 RETVAL 3458 RETVAL
1357 3459
1358int 3460int
1359nready (...) 3461nready (...)
… …
1361 CODE: 3463 CODE:
1362 RETVAL = coro_nready; 3464 RETVAL = coro_nready;
1363 OUTPUT: 3465 OUTPUT:
1364 RETVAL 3466 RETVAL
1365 3467
1366MODULE = Coro::State PACKAGE = Coro::AIO 3468void
3469suspend (Coro::State self)
3470 PROTOTYPE: $
3471 CODE:
3472 self->flags |= CF_SUSPENDED;
3473
3474void
3475resume (Coro::State self)
3476 PROTOTYPE: $
3477 CODE:
3478 self->flags &= ~CF_SUSPENDED;
3479
3480void
3481_pool_handler (...)
3482 CODE:
3483 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3484
3485void
3486async_pool (SV *cv, ...)
3487 PROTOTYPE: &@
3488 PPCODE:
3489{
3490 HV *hv = (HV *)av_pop (av_async_pool);
3491 AV *av = newAV ();
3492 SV *cb = ST (0);
3493 int i;
3494
3495 av_extend (av, items - 2);
3496 for (i = 1; i < items; ++i)
3497 av_push (av, SvREFCNT_inc_NN (ST (i)));
3498
3499 if ((SV *)hv == &PL_sv_undef)
3500 {
3501 PUSHMARK (SP);
3502 EXTEND (SP, 2);
3503 PUSHs (sv_Coro);
3504 PUSHs ((SV *)cv_pool_handler);
3505 PUTBACK;
3506 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3507 SPAGAIN;
3508
3509 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3510 }
3511
3512 {
3513 struct coro *coro = SvSTATE_hv (hv);
3514
3515 assert (!coro->invoke_cb);
3516 assert (!coro->invoke_av);
3517 coro->invoke_cb = SvREFCNT_inc (cb);
3518 coro->invoke_av = av;
3519 }
3520
3521 api_ready (aTHX_ (SV *)hv);
3522
3523 if (GIMME_V != G_VOID)
3524 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3525 else
3526 SvREFCNT_dec (hv);
3527}
1367 3528
1368SV * 3529SV *
1369_get_state () 3530rouse_cb ()
3531 PROTOTYPE:
1370 CODE: 3532 CODE:
1371{ 3533 RETVAL = coro_new_rouse_cb (aTHX);
1372 struct io_state *data;
1373
1374 RETVAL = newSV (sizeof (struct io_state));
1375 data = (struct io_state *)SvPVX (RETVAL);
1376 SvCUR_set (RETVAL, sizeof (struct io_state));
1377 SvPOK_only (RETVAL);
1378
1379 data->errorno = errno;
1380 data->laststype = PL_laststype;
1381 data->laststatval = PL_laststatval;
1382 data->statcache = PL_statcache;
1383}
1384 OUTPUT: 3534 OUTPUT:
1385 RETVAL 3535 RETVAL
1386 3536
1387void 3537void
1388_set_state (char *data_) 3538rouse_wait (...)
3539 PROTOTYPE: ;$
3540 PPCODE:
3541 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3542
3543void
3544on_enter (SV *block)
3545 ALIAS:
3546 on_leave = 1
1389 PROTOTYPE: $ 3547 PROTOTYPE: &
1390 CODE: 3548 CODE:
1391{ 3549{
1392 struct io_state *data = (void *)data_; 3550 struct coro *coro = SvSTATE_current;
3551 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1393 3552
1394 errno = data->errorno; 3553 block = s_get_cv_croak (block);
1395 PL_laststype = data->laststype;
1396 PL_laststatval = data->laststatval;
1397 PL_statcache = data->statcache;
1398}
1399 3554
3555 if (!*avp)
3556 *avp = newAV ();
3557
3558 av_push (*avp, SvREFCNT_inc (block));
3559
3560 if (!ix)
3561 on_enterleave_call (aTHX_ block);
3562
3563 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3564 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3565 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3566}
3567
3568
3569MODULE = Coro::State PACKAGE = PerlIO::cede
3570
3571BOOT:
3572 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3573
3574
3575MODULE = Coro::State PACKAGE = Coro::Semaphore
3576
3577SV *
3578new (SV *klass, SV *count = 0)
3579 CODE:
3580{
3581 int semcnt = 1;
3582
3583 if (count)
3584 {
3585 SvGETMAGIC (count);
3586
3587 if (SvOK (count))
3588 semcnt = SvIV (count);
3589 }
3590
3591 RETVAL = sv_bless (
3592 coro_waitarray_new (aTHX_ semcnt),
3593 GvSTASH (CvGV (cv))
3594 );
3595}
3596 OUTPUT:
3597 RETVAL
3598
3599# helper for Coro::Channel and others
3600SV *
3601_alloc (int count)
3602 CODE:
3603 RETVAL = coro_waitarray_new (aTHX_ count);
3604 OUTPUT:
3605 RETVAL
3606
3607SV *
3608count (SV *self)
3609 CODE:
3610 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3611 OUTPUT:
3612 RETVAL
3613
3614void
3615up (SV *self, int adjust = 1)
3616 ALIAS:
3617 adjust = 1
3618 CODE:
3619 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3620
3621void
3622down (...)
3623 CODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3625
3626void
3627wait (...)
3628 CODE:
3629 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3630
3631void
3632try (SV *self)
3633 PPCODE:
3634{
3635 AV *av = (AV *)SvRV (self);
3636 SV *count_sv = AvARRAY (av)[0];
3637 IV count = SvIVX (count_sv);
3638
3639 if (count > 0)
3640 {
3641 --count;
3642 SvIVX (count_sv) = count;
3643 XSRETURN_YES;
3644 }
3645 else
3646 XSRETURN_NO;
3647}
3648
3649void
3650waiters (SV *self)
3651 PPCODE:
3652{
3653 AV *av = (AV *)SvRV (self);
3654 int wcount = AvFILLp (av) + 1 - 1;
3655
3656 if (GIMME_V == G_SCALAR)
3657 XPUSHs (sv_2mortal (newSViv (wcount)));
3658 else
3659 {
3660 int i;
3661 EXTEND (SP, wcount);
3662 for (i = 1; i <= wcount; ++i)
3663 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3664 }
3665}
3666
3667MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3668
3669void
3670_may_delete (SV *sem, int count, int extra_refs)
3671 PPCODE:
3672{
3673 AV *av = (AV *)SvRV (sem);
3674
3675 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3676 && AvFILLp (av) == 0 /* no waiters, just count */
3677 && SvIV (AvARRAY (av)[0]) == count)
3678 XSRETURN_YES;
3679
3680 XSRETURN_NO;
3681}
3682
3683MODULE = Coro::State PACKAGE = Coro::Signal
3684
3685SV *
3686new (SV *klass)
3687 CODE:
3688 RETVAL = sv_bless (
3689 coro_waitarray_new (aTHX_ 0),
3690 GvSTASH (CvGV (cv))
3691 );
3692 OUTPUT:
3693 RETVAL
3694
3695void
3696wait (...)
3697 CODE:
3698 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3699
3700void
3701broadcast (SV *self)
3702 CODE:
3703{
3704 AV *av = (AV *)SvRV (self);
3705 coro_signal_wake (aTHX_ av, AvFILLp (av));
3706}
3707
3708void
3709send (SV *self)
3710 CODE:
3711{
3712 AV *av = (AV *)SvRV (self);
3713
3714 if (AvFILLp (av))
3715 coro_signal_wake (aTHX_ av, 1);
3716 else
3717 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3718}
3719
3720IV
3721awaited (SV *self)
3722 CODE:
3723 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3724 OUTPUT:
3725 RETVAL
3726
3727
3728MODULE = Coro::State PACKAGE = Coro::AnyEvent
3729
3730BOOT:
3731 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3732
3733void
3734_schedule (...)
3735 CODE:
3736{
3737 static int incede;
3738
3739 api_cede_notself (aTHX);
3740
3741 ++incede;
3742 while (coro_nready >= incede && api_cede (aTHX))
3743 ;
3744
3745 sv_setsv (sv_activity, &PL_sv_undef);
3746 if (coro_nready >= incede)
3747 {
3748 PUSHMARK (SP);
3749 PUTBACK;
3750 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3751 }
3752
3753 --incede;
3754}
3755
3756
3757MODULE = Coro::State PACKAGE = Coro::AIO
3758
3759void
3760_register (char *target, char *proto, SV *req)
3761 CODE:
3762{
3763 SV *req_cv = s_get_cv_croak (req);
3764 /* newXSproto doesn't return the CV on 5.8 */
3765 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3766 sv_setpv ((SV *)slf_cv, proto);
3767 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3768}
3769
3770MODULE = Coro::State PACKAGE = Coro::Select
3771
3772void
3773patch_pp_sselect ()
3774 CODE:
3775 if (!coro_old_pp_sselect)
3776 {
3777 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3778 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3779 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3780 }
3781
3782void
3783unpatch_pp_sselect ()
3784 CODE:
3785 if (coro_old_pp_sselect)
3786 {
3787 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3788 coro_old_pp_sselect = 0;
3789 }
3790
3791

Diff Legend

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