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Comparing Coro/Coro/State.xs (file contents):
Revision 1.118 by root, Fri Dec 1 19:58:53 2006 UTC vs.
Revision 1.369 by root, Thu Aug 13 02:48:32 2009 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "schmorp.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
15#include <assert.h>
45 16
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
47# undef STACKGUARD 18# undef setjmp
48#endif 19# undef longjmp
49 20# undef _exit
50#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
51# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
52#endif 24#endif
53 25
54#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
55# include <unistd.h> 27# include <unistd.h>
56# include <sys/mman.h> 28# include <sys/mman.h>
… …
72#else 44#else
73# define PAGESIZE 0 45# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
75#endif 47#endif
76 48
77/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
79 * and should be unique. */ 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
80#define dSTACKLEVEL int stacklevel 72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
81#define STACKLEVEL ((void *)&stacklevel) 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
82 78
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
84 80
85#if __GNUC__ >= 3 81#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x) 82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
87#else 85#else
88# define attribute(x) 86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
89#endif 89#endif
90 90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
91#define NOINLINE attribute ((noinline)) 94#define NOINLINE attribute ((noinline))
92 95
93#include "CoroAPI.h" 96#include "CoroAPI.h"
94 97#define GCoroAPI (&coroapi) /* very sneaky */
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96 98
97#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
98static perl_mutex coro_mutex; 100# if CORO_PTHREAD
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
101#else
102# define LOCK (void)0
103# define UNLOCK (void)0
104#endif 103#endif
105 104
105#ifdef __linux
106# include <time.h> /* for timespec */
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
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
123static size_t cctx_stacksize = CORO_STACKSIZE;
106static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
107static 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;
108static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
109static 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;
147
148/* Coro::AnyEvent */
149static SV *sv_activity;
150
151/* enable processtime/realtime profiling */
152static char enable_times;
153typedef U32 coro_ts[2];
154static coro_ts time_real, time_cpu;
155static char times_valid;
110 156
111static struct coro_cctx *cctx_first; 157static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 158static int cctx_count, cctx_idle;
113 159
160enum {
161 CC_MAPPED = 0x01,
162 CC_NOREUSE = 0x02, /* throw this away after tracing */
163 CC_TRACE = 0x04,
164 CC_TRACE_SUB = 0x08, /* trace sub calls */
165 CC_TRACE_LINE = 0x10, /* trace each statement */
166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
167};
168
114/* this is a structure representing a c-level coroutine */ 169/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 170typedef struct coro_cctx
171{
116 struct coro_cctx *next; 172 struct coro_cctx *next;
117 173
118 /* the stack */ 174 /* the stack */
119 void *sptr; 175 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 176 size_t ssize;
121 177
122 /* cpu state */ 178 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124 JMPENV *top_env; 181 JMPENV *top_env;
125 coro_context cctx; 182 coro_context cctx;
126 183
127 int inuse; 184 U32 gen;
128
129#if USE_VALGRIND 185#if CORO_USE_VALGRIND
130 int valgrind_id; 186 int valgrind_id;
131#endif 187#endif
188 unsigned char flags;
132} coro_cctx; 189} coro_cctx;
133 190
191coro_cctx *cctx_current; /* the currently running cctx */
192
193/*****************************************************************************/
194
134enum { 195enum {
135 CF_RUNNING = 0x0001, /* coroutine is running */ 196 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */ 197 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */ 198 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
138}; 201};
139 202
140/* this is a structure representing a perl-level coroutine */ 203/* the structure where most of the perl state is stored, overlaid on the cxstack */
141struct coro { 204typedef struct
142 /* the c coroutine allocated to this perl coroutine, if any */ 205{
143 coro_cctx *cctx; 206 SV *defsv;
144
145 /* data associated with this coroutine (initial args) */
146 AV *args;
147 int refcnt;
148 int flags;
149
150 /* optionally saved, might be zero */
151 AV *defav; 207 AV *defav;
152 SV *defsv;
153 SV *errsv; 208 SV *errsv;
154 209 SV *irsgv;
210 HV *hinthv;
155#define VAR(name,type) type name; 211#define VAR(name,type) type name;
156# include "state.h" 212# include "state.h"
157#undef VAR 213#undef VAR
214} perl_slots;
215
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217
218/* this is a structure representing a perl-level coroutine */
219struct coro {
220 /* the C coroutine allocated to this perl coroutine, if any */
221 coro_cctx *cctx;
222
223 /* ready queue */
224 struct coro *next_ready;
225
226 /* state data */
227 struct CoroSLF slf_frame; /* saved slf frame */
228 AV *mainstack;
229 perl_slots *slot; /* basically the saved sp */
230
231 CV *startcv; /* the CV to execute */
232 AV *args; /* data associated with this coroutine (initial args) */
233 int refcnt; /* coroutines are refcounted, yes */
234 int flags; /* CF_ flags */
235 HV *hv; /* the perl hash associated with this coro, if any */
236 void (*on_destroy)(pTHX_ struct coro *coro);
237
238 /* statistics */
239 int usecount; /* number of transfers to this coro */
158 240
159 /* coro process data */ 241 /* coro process data */
160 int prio; 242 int prio;
243 SV *except; /* exception to be thrown */
244 SV *rouse_cb;
245
246 /* async_pool */
247 SV *saved_deffh;
248 SV *invoke_cb;
249 AV *invoke_av;
250
251 /* on_enter/on_leave */
252 AV *on_enter;
253 AV *on_leave;
254
255 /* times */
256 coro_ts t_cpu, t_real;
257
258 /* linked list */
259 struct coro *next, *prev;
161}; 260};
162 261
163typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
164typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
165 264
265/* the following variables are effectively part of the perl context */
266/* and get copied between struct coro and these variables */
267/* the mainr easonw e don't support windows process emulation */
268static struct CoroSLF slf_frame; /* the current slf frame */
269
270/** Coro ********************************************************************/
271
272#define CORO_PRIO_MAX 3
273#define CORO_PRIO_HIGH 1
274#define CORO_PRIO_NORMAL 0
275#define CORO_PRIO_LOW -1
276#define CORO_PRIO_IDLE -3
277#define CORO_PRIO_MIN -4
278
279/* for Coro.pm */
280static SV *coro_current;
281static SV *coro_readyhook;
282static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
283static CV *cv_coro_run, *cv_coro_terminate;
284static struct coro *coro_first;
285#define coro_nready coroapi.nready
286
287/** Coro::Select ************************************************************/
288
289static OP *(*coro_old_pp_sselect) (pTHX);
290static SV *coro_select_select;
291
292/* horrible hack, but if it works... */
293static OP *
294coro_pp_sselect (aTHX)
295{
296 dSP;
297 PUSHMARK (SP - 4); /* fake argument list */
298 XPUSHs (coro_select_select);
299 PUTBACK;
300
301 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
302 PL_op->op_flags |= OPf_STACKED;
303 PL_op->op_private = 0;
304 return PL_ppaddr [OP_ENTERSUB](aTHX);
305}
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
166static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339INLINE void
340coro_times_update ()
341{
342#ifdef coro_clock_gettime
343 struct timespec ts;
344
345 ts.tv_sec = ts.tv_nsec = 0;
346 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
347 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
348
349 ts.tv_sec = ts.tv_nsec = 0;
350 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
351 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
352#else
353 dTHX;
354 UV tv[2];
355
356 u2time (aTHX_ tv);
357 time_real [0] = tv [0];
358 time_real [1] = tv [1] * 1000;
359#endif
360}
361
362INLINE void
363coro_times_add (struct coro *c)
364{
365 c->t_real [1] += time_real [1];
366 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
367 c->t_real [0] += time_real [0];
368
369 c->t_cpu [1] += time_cpu [1];
370 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
371 c->t_cpu [0] += time_cpu [0];
372}
373
374INLINE void
375coro_times_sub (struct coro *c)
376{
377 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
378 c->t_real [1] -= time_real [1];
379 c->t_real [0] -= time_real [0];
380
381 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
382 c->t_cpu [1] -= time_cpu [1];
383 c->t_cpu [0] -= time_cpu [0];
384}
385
386/*****************************************************************************/
387/* magic glue */
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392#define CORO_MAGIC_NN(sv, type) \
393 (expect_true (SvMAGIC (sv)->mg_type == type) \
394 ? SvMAGIC (sv) \
395 : mg_find (sv, type))
396
397#define CORO_MAGIC(sv, type) \
398 (expect_true (SvMAGIC (sv)) \
399 ? CORO_MAGIC_NN (sv, type) \
400 : 0)
401
402#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
403#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
404
405INLINE struct coro *
406SvSTATE_ (pTHX_ SV *coro)
407{
408 HV *stash;
409 MAGIC *mg;
410
411 if (SvROK (coro))
412 coro = SvRV (coro);
413
414 if (expect_false (SvTYPE (coro) != SVt_PVHV))
415 croak ("Coro::State object required");
416
417 stash = SvSTASH (coro);
418 if (expect_false (stash != coro_stash && stash != coro_state_stash))
419 {
420 /* very slow, but rare, check */
421 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
422 croak ("Coro::State object required");
423 }
424
425 mg = CORO_MAGIC_state (coro);
426 return (struct coro *)mg->mg_ptr;
427}
428
429#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
430
431/* faster than SvSTATE, but expects a coroutine hv */
432#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
433#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
434
435/*****************************************************************************/
436/* padlist management and caching */
437
438static AV *
167coro_clone_padlist (CV *cv) 439coro_derive_padlist (pTHX_ CV *cv)
168{ 440{
169 AV *padlist = CvPADLIST (cv); 441 AV *padlist = CvPADLIST (cv);
170 AV *newpadlist, *newpad; 442 AV *newpadlist, *newpad;
171 443
172 newpadlist = newAV (); 444 newpadlist = newAV ();
173 AvREAL_off (newpadlist); 445 AvREAL_off (newpadlist);
174#if PERL_VERSION_ATLEAST (5,9,0) 446#if PERL_VERSION_ATLEAST (5,10,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 447 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else 448#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 449 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif 450#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 451 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist); 452 --AvFILLp (padlist);
181 453
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 454 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
183 av_store (newpadlist, 1, (SV *)newpad); 455 av_store (newpadlist, 1, (SV *)newpad);
184 456
185 return newpadlist; 457 return newpadlist;
186} 458}
187 459
188static void 460static void
189free_padlist (AV *padlist) 461free_padlist (pTHX_ AV *padlist)
190{ 462{
191 /* may be during global destruction */ 463 /* may be during global destruction */
192 if (SvREFCNT (padlist)) 464 if (!IN_DESTRUCT)
193 { 465 {
194 I32 i = AvFILLp (padlist); 466 I32 i = AvFILLp (padlist);
195 while (i >= 0) 467
468 while (i > 0) /* special-case index 0 */
196 { 469 {
197 SV **svp = av_fetch (padlist, i--, FALSE); 470 /* we try to be extra-careful here */
198 if (svp) 471 AV *av = (AV *)AvARRAY (padlist)[i--];
199 { 472 I32 j = AvFILLp (av);
200 SV *sv; 473
201 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 474 while (j >= 0)
475 SvREFCNT_dec (AvARRAY (av)[j--]);
476
477 AvFILLp (av) = -1;
202 SvREFCNT_dec (sv); 478 SvREFCNT_dec (av);
203
204 SvREFCNT_dec (*svp);
205 }
206 } 479 }
207 480
481 SvREFCNT_dec (AvARRAY (padlist)[0]);
482
483 AvFILLp (padlist) = -1;
208 SvREFCNT_dec ((SV*)padlist); 484 SvREFCNT_dec ((SV*)padlist);
209 } 485 }
210} 486}
211 487
212static int 488static int
213coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 489coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
214{ 490{
215 AV *padlist; 491 AV *padlist;
216 AV *av = (AV *)mg->mg_obj; 492 AV *av = (AV *)mg->mg_obj;
217 493
494 /* perl manages to free our internal AV and _then_ call us */
495 if (IN_DESTRUCT)
496 return 0;
497
218 /* casting is fun. */ 498 /* casting is fun. */
219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 499 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220 free_padlist (padlist); 500 free_padlist (aTHX_ padlist);
221 501
222 SvREFCNT_dec (av); 502 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
223 503
224 return 0; 504 return 0;
225} 505}
226 506
227#define PERL_MAGIC_coro PERL_MAGIC_ext 507static MGVTBL coro_cv_vtbl = {
228 508 0, 0, 0, 0,
229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 509 coro_cv_free
230 510};
231#define CORO_MAGIC(cv) \
232 SvMAGIC (cv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234 ? SvMAGIC (cv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
236 : 0
237 511
238/* the next two functions merely cache the padlists */ 512/* the next two functions merely cache the padlists */
239static void 513static void
240get_padlist (CV *cv) 514get_padlist (pTHX_ CV *cv)
241{ 515{
242 MAGIC *mg = CORO_MAGIC (cv); 516 MAGIC *mg = CORO_MAGIC_cv (cv);
243 AV *av; 517 AV *av;
244 518
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 519 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 520 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247 else 521 else
248 { 522 {
249#if 0 523#if CORO_PREFER_PERL_FUNCTIONS
250 /* this is probably cleaner, but also slower? */ 524 /* this is probably cleaner? but also slower! */
525 /* in practise, it seems to be less stable */
251 CV *cp = Perl_cv_clone (cv); 526 CV *cp = Perl_cv_clone (aTHX_ cv);
252 CvPADLIST (cv) = CvPADLIST (cp); 527 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0; 528 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp); 529 SvREFCNT_dec (cp);
255#else 530#else
256 CvPADLIST (cv) = coro_clone_padlist (cv); 531 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
257#endif 532#endif
258 } 533 }
259} 534}
260 535
261static void 536static void
262put_padlist (CV *cv) 537put_padlist (pTHX_ CV *cv)
263{ 538{
264 MAGIC *mg = CORO_MAGIC (cv); 539 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 540 AV *av;
266 541
267 if (!mg) 542 if (expect_false (!mg))
268 { 543 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
273 }
274 544
275 av = (AV *)mg->mg_obj; 545 av = (AV *)mg->mg_obj;
276 546
277 if (AvFILLp (av) >= AvMAX (av)) 547 if (expect_false (AvFILLp (av) >= AvMAX (av)))
278 av_extend (av, AvMAX (av) + 1); 548 av_extend (av, AvFILLp (av) + 1);
279 549
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 550 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281} 551}
282 552
283#define SB do { 553/** load & save, init *******************************************************/
284#define SE } while (0)
285 554
286#define LOAD(state) load_state ((state))
287#define SAVE(state,flags) save_state ((state),(flags))
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290
291static void 555static void
556on_enterleave_call (pTHX_ SV *cb);
557
558static void
292load_state (Coro__State c) 559load_perl (pTHX_ Coro__State c)
293{ 560{
561 perl_slots *slot = c->slot;
562 c->slot = 0;
563
564 PL_mainstack = c->mainstack;
565
566 GvSV (PL_defgv) = slot->defsv;
567 GvAV (PL_defgv) = slot->defav;
568 GvSV (PL_errgv) = slot->errsv;
569 GvSV (irsgv) = slot->irsgv;
570 GvHV (PL_hintgv) = slot->hinthv;
571
294#define VAR(name,type) PL_ ## name = c->name; 572 #define VAR(name,type) PL_ ## name = slot->name;
295# include "state.h" 573 # include "state.h"
296#undef VAR 574 #undef VAR
297
298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301 575
302 { 576 {
303 dSP; 577 dSP;
578
304 CV *cv; 579 CV *cv;
305 580
306 /* now do the ugly restore mess */ 581 /* now do the ugly restore mess */
307 while ((cv = (CV *)POPs)) 582 while (expect_true (cv = (CV *)POPs))
308 { 583 {
309 put_padlist (cv); /* mark this padlist as available */ 584 put_padlist (aTHX_ cv); /* mark this padlist as available */
310 CvDEPTH (cv) = PTR2IV (POPs); 585 CvDEPTH (cv) = PTR2IV (POPs);
311 CvPADLIST (cv) = (AV *)POPs; 586 CvPADLIST (cv) = (AV *)POPs;
312 } 587 }
313 588
314 PUTBACK; 589 PUTBACK;
315 } 590 }
316}
317 591
592 slf_frame = c->slf_frame;
593 CORO_THROW = c->except;
594
595 if (expect_false (enable_times))
596 {
597 if (expect_false (!times_valid))
598 coro_times_update ();
599
600 coro_times_sub (c);
601 }
602
603 if (expect_false (c->on_enter))
604 {
605 int i;
606
607 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
608 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
609 }
610}
611
318static void 612static void
319save_state (Coro__State c, int flags) 613save_perl (pTHX_ Coro__State c)
320{ 614{
615 if (expect_false (c->on_leave))
616 {
617 int i;
618
619 for (i = AvFILLp (c->on_leave); i >= 0; --i)
620 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
621 }
622
623 times_valid = 0;
624
625 if (expect_false (enable_times))
626 {
627 coro_times_update (); times_valid = 1;
628 coro_times_add (c);
629 }
630
631 c->except = CORO_THROW;
632 c->slf_frame = slf_frame;
633
321 { 634 {
322 dSP; 635 dSP;
323 I32 cxix = cxstack_ix; 636 I32 cxix = cxstack_ix;
324 PERL_CONTEXT *ccstk = cxstack; 637 PERL_CONTEXT *ccstk = cxstack;
325 PERL_SI *top_si = PL_curstackinfo; 638 PERL_SI *top_si = PL_curstackinfo;
… …
327 /* 640 /*
328 * the worst thing you can imagine happens first - we have to save 641 * the worst thing you can imagine happens first - we have to save
329 * (and reinitialize) all cv's in the whole callchain :( 642 * (and reinitialize) all cv's in the whole callchain :(
330 */ 643 */
331 644
332 PUSHs (Nullsv); 645 XPUSHs (Nullsv);
333 /* this loop was inspired by pp_caller */ 646 /* this loop was inspired by pp_caller */
334 for (;;) 647 for (;;)
335 { 648 {
336 while (cxix >= 0) 649 while (expect_true (cxix >= 0))
337 { 650 {
338 PERL_CONTEXT *cx = &ccstk[cxix--]; 651 PERL_CONTEXT *cx = &ccstk[cxix--];
339 652
340 if (CxTYPE (cx) == CXt_SUB) 653 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
341 { 654 {
342 CV *cv = cx->blk_sub.cv; 655 CV *cv = cx->blk_sub.cv;
343 656
344 if (CvDEPTH (cv)) 657 if (expect_true (CvDEPTH (cv)))
345 { 658 {
346 EXTEND (SP, 3); 659 EXTEND (SP, 3);
347
348 PUSHs ((SV *)CvPADLIST (cv)); 660 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 661 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
350 PUSHs ((SV *)cv); 662 PUSHs ((SV *)cv);
351 663
352 CvDEPTH (cv) = 0; 664 CvDEPTH (cv) = 0;
353 get_padlist (cv); 665 get_padlist (aTHX_ cv);
354 } 666 }
355 } 667 }
356#ifdef CXt_FORMAT
357 else if (CxTYPE (cx) == CXt_FORMAT)
358 {
359 /* I never used formats, so how should I know how these are implemented? */
360 /* my bold guess is as a simple, plain sub... */
361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362 }
363#endif
364 } 668 }
365 669
366 if (top_si->si_type == PERLSI_MAIN) 670 if (expect_true (top_si->si_type == PERLSI_MAIN))
367 break; 671 break;
368 672
369 top_si = top_si->si_prev; 673 top_si = top_si->si_prev;
370 ccstk = top_si->si_cxstack; 674 ccstk = top_si->si_cxstack;
371 cxix = top_si->si_cxix; 675 cxix = top_si->si_cxix;
372 } 676 }
373 677
374 PUTBACK; 678 PUTBACK;
375 } 679 }
376 680
377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 681 /* allocate some space on the context stack for our purposes */
378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 682 /* we manually unroll here, as usually 2 slots is enough */
379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 683 if (SLOT_COUNT >= 1) CXINC;
684 if (SLOT_COUNT >= 2) CXINC;
685 if (SLOT_COUNT >= 3) CXINC;
686 {
687 unsigned int i;
688 for (i = 3; i < SLOT_COUNT; ++i)
689 CXINC;
690 }
691 cxstack_ix -= SLOT_COUNT; /* undo allocation */
380 692
693 c->mainstack = PL_mainstack;
694
695 {
696 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
697
698 slot->defav = GvAV (PL_defgv);
699 slot->defsv = DEFSV;
700 slot->errsv = ERRSV;
701 slot->irsgv = GvSV (irsgv);
702 slot->hinthv = GvHV (PL_hintgv);
703
381#define VAR(name,type)c->name = PL_ ## name; 704 #define VAR(name,type) slot->name = PL_ ## name;
382# include "state.h" 705 # include "state.h"
383#undef VAR 706 #undef VAR
707 }
384} 708}
385 709
386/* 710/*
387 * allocate various perl stacks. This is an exact copy 711 * allocate various perl stacks. This is almost an exact copy
388 * of perl.c:init_stacks, except that it uses less memory 712 * of perl.c:init_stacks, except that it uses less memory
389 * on the (sometimes correct) assumption that coroutines do 713 * on the (sometimes correct) assumption that coroutines do
390 * not usually need a lot of stackspace. 714 * not usually need a lot of stackspace.
391 */ 715 */
716#if CORO_PREFER_PERL_FUNCTIONS
717# define coro_init_stacks(thx) init_stacks ()
718#else
392static void 719static void
393coro_init_stacks () 720coro_init_stacks (pTHX)
394{ 721{
395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 722 PL_curstackinfo = new_stackinfo(32, 8);
396 PL_curstackinfo->si_type = PERLSI_MAIN; 723 PL_curstackinfo->si_type = PERLSI_MAIN;
397 PL_curstack = PL_curstackinfo->si_stack; 724 PL_curstack = PL_curstackinfo->si_stack;
398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 725 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399 726
400 PL_stack_base = AvARRAY(PL_curstack); 727 PL_stack_base = AvARRAY(PL_curstack);
401 PL_stack_sp = PL_stack_base; 728 PL_stack_sp = PL_stack_base;
402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 729 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403 730
404 New(50,PL_tmps_stack,128,SV*); 731 New(50,PL_tmps_stack,32,SV*);
405 PL_tmps_floor = -1; 732 PL_tmps_floor = -1;
406 PL_tmps_ix = -1; 733 PL_tmps_ix = -1;
407 PL_tmps_max = 128; 734 PL_tmps_max = 32;
408 735
409 New(54,PL_markstack,32,I32); 736 New(54,PL_markstack,16,I32);
410 PL_markstack_ptr = PL_markstack; 737 PL_markstack_ptr = PL_markstack;
411 PL_markstack_max = PL_markstack + 32; 738 PL_markstack_max = PL_markstack + 16;
412 739
413#ifdef SET_MARK_OFFSET 740#ifdef SET_MARK_OFFSET
414 SET_MARK_OFFSET; 741 SET_MARK_OFFSET;
415#endif 742#endif
416 743
417 New(54,PL_scopestack,32,I32); 744 New(54,PL_scopestack,8,I32);
418 PL_scopestack_ix = 0; 745 PL_scopestack_ix = 0;
419 PL_scopestack_max = 32; 746 PL_scopestack_max = 8;
420 747
421 New(54,PL_savestack,64,ANY); 748 New(54,PL_savestack,24,ANY);
422 PL_savestack_ix = 0; 749 PL_savestack_ix = 0;
423 PL_savestack_max = 64; 750 PL_savestack_max = 24;
424 751
425#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
426 New(54,PL_retstack,16,OP*); 753 New(54,PL_retstack,4,OP*);
427 PL_retstack_ix = 0; 754 PL_retstack_ix = 0;
428 PL_retstack_max = 16; 755 PL_retstack_max = 4;
429#endif 756#endif
430} 757}
758#endif
431 759
432/* 760/*
433 * destroy the stacks, the callchain etc... 761 * destroy the stacks, the callchain etc...
434 */ 762 */
435static void 763static void
436coro_destroy_stacks () 764coro_destruct_stacks (pTHX)
437{ 765{
438 if (!IN_DESTRUCT)
439 {
440 /* is this ugly, I ask? */
441 LEAVE_SCOPE (0);
442
443 /* sure it is, but more important: is it correct?? :/ */
444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
448
449 while (PL_curstackinfo->si_next) 766 while (PL_curstackinfo->si_next)
450 PL_curstackinfo = PL_curstackinfo->si_next; 767 PL_curstackinfo = PL_curstackinfo->si_next;
451 768
452 while (PL_curstackinfo) 769 while (PL_curstackinfo)
453 { 770 {
454 PERL_SI *p = PL_curstackinfo->si_prev; 771 PERL_SI *p = PL_curstackinfo->si_prev;
455 772
456 { /*D*//*remove*/
457 dSP;
458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459 PUTBACK; /* possibly superfluous */
460 }
461
462 if (!IN_DESTRUCT) 773 if (!IN_DESTRUCT)
463 {
464 dounwind (-1);/*D*//*remove*/
465 SvREFCNT_dec (PL_curstackinfo->si_stack); 774 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467 775
468 Safefree (PL_curstackinfo->si_cxstack); 776 Safefree (PL_curstackinfo->si_cxstack);
469 Safefree (PL_curstackinfo); 777 Safefree (PL_curstackinfo);
470 PL_curstackinfo = p; 778 PL_curstackinfo = p;
471 } 779 }
472 780
473 Safefree (PL_tmps_stack); 781 Safefree (PL_tmps_stack);
474 Safefree (PL_markstack); 782 Safefree (PL_markstack);
475 Safefree (PL_scopestack); 783 Safefree (PL_scopestack);
476 Safefree (PL_savestack); 784 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0) 785#if !PERL_VERSION_ATLEAST (5,10,0)
478 Safefree (PL_retstack); 786 Safefree (PL_retstack);
479#endif 787#endif
480} 788}
481 789
790#define CORO_RSS \
791 rss += sizeof (SYM (curstackinfo)); \
792 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
793 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
794 rss += SYM (tmps_max) * sizeof (SV *); \
795 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
796 rss += SYM (scopestack_max) * sizeof (I32); \
797 rss += SYM (savestack_max) * sizeof (ANY);
798
799static size_t
800coro_rss (pTHX_ struct coro *coro)
801{
802 size_t rss = sizeof (*coro);
803
804 if (coro->mainstack)
805 {
806 if (coro->flags & CF_RUNNING)
807 {
808 #define SYM(sym) PL_ ## sym
809 CORO_RSS;
810 #undef SYM
811 }
812 else
813 {
814 #define SYM(sym) coro->slot->sym
815 CORO_RSS;
816 #undef SYM
817 }
818 }
819
820 return rss;
821}
822
823/** coroutine stack handling ************************************************/
824
825static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
826static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
828
829/* apparently < 5.8.8 */
830#ifndef MgPV_nolen_const
831#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
832 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
833 (const char*)(mg)->mg_ptr)
834#endif
835
836/*
837 * This overrides the default magic get method of %SIG elements.
838 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
839 * and instead of trying to save and restore the hash elements, we just provide
840 * readback here.
841 */
482static void 842static int
483setup_coro (struct coro *coro) 843coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
844{
845 const char *s = MgPV_nolen_const (mg);
846
847 if (*s == '_')
848 {
849 SV **svp = 0;
850
851 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
852 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
853
854 if (svp)
855 {
856 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
857 return 0;
858 }
859 }
860
861 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
862}
863
864static int
865coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
866{
867 const char *s = MgPV_nolen_const (mg);
868
869 if (*s == '_')
870 {
871 SV **svp = 0;
872
873 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
874 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
875
876 if (svp)
877 {
878 SV *old = *svp;
879 *svp = 0;
880 SvREFCNT_dec (old);
881 return 0;
882 }
883 }
884
885 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
886}
887
888static int
889coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
890{
891 const char *s = MgPV_nolen_const (mg);
892
893 if (*s == '_')
894 {
895 SV **svp = 0;
896
897 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
898 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
899
900 if (svp)
901 {
902 SV *old = *svp;
903 *svp = SvOK (sv) ? newSVsv (sv) : 0;
904 SvREFCNT_dec (old);
905 return 0;
906 }
907 }
908
909 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
910}
911
912static void
913prepare_nop (pTHX_ struct coro_transfer_args *ta)
914{
915 /* kind of mega-hacky, but works */
916 ta->next = ta->prev = (struct coro *)ta;
917}
918
919static int
920slf_check_nop (pTHX_ struct CoroSLF *frame)
921{
922 return 0;
923}
924
925static int
926slf_check_repeat (pTHX_ struct CoroSLF *frame)
927{
928 return 1;
929}
930
931static UNOP coro_setup_op;
932
933static void NOINLINE /* noinline to keep it out of the transfer fast path */
934coro_setup (pTHX_ struct coro *coro)
484{ 935{
485 /* 936 /*
486 * emulate part of the perl startup here. 937 * emulate part of the perl startup here.
487 */ 938 */
488
489 coro_init_stacks (); 939 coro_init_stacks (aTHX);
490 940
941 PL_runops = RUNOPS_DEFAULT;
491 PL_curcop = &PL_compiling; 942 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL; 943 PL_in_eval = EVAL_NULL;
944 PL_comppad = 0;
945 PL_comppad_name = 0;
946 PL_comppad_name_fill = 0;
947 PL_comppad_name_floor = 0;
493 PL_curpm = 0; 948 PL_curpm = 0;
949 PL_curpad = 0;
494 PL_localizing = 0; 950 PL_localizing = 0;
495 PL_dirty = 0; 951 PL_dirty = 0;
496 PL_restartop = 0; 952 PL_restartop = 0;
953#if PERL_VERSION_ATLEAST (5,10,0)
954 PL_parser = 0;
955#endif
956 PL_hints = 0;
957
958 /* recreate the die/warn hooks */
959 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
960 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
961
962 GvSV (PL_defgv) = newSV (0);
963 GvAV (PL_defgv) = coro->args; coro->args = 0;
964 GvSV (PL_errgv) = newSV (0);
965 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
966 GvHV (PL_hintgv) = 0;
967 PL_rs = newSVsv (GvSV (irsgv));
968 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
497 969
498 { 970 {
499 dSP; 971 dSP;
500 LOGOP myop; 972 UNOP myop;
501 973
502 /* I have no idea why this is needed, but it is */ 974 Zero (&myop, 1, UNOP);
975 myop.op_next = Nullop;
976 myop.op_type = OP_ENTERSUB;
977 myop.op_flags = OPf_WANT_VOID;
978
503 PUSHMARK (SP); 979 PUSHMARK (SP);
504 980 PUSHs ((SV *)coro->startcv);
505 SvREFCNT_dec (GvAV (PL_defgv)); 981 PUTBACK;
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP);
509 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID;
511
512 PL_op = (OP *)&myop; 982 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 983 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN;
519 } 984 }
520 985
521 ENTER; /* necessary e.g. for dounwind */ 986 /* this newly created coroutine might be run on an existing cctx which most
522} 987 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
988 */
989 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
990 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
523 991
992 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
993 coro_setup_op.op_next = PL_op;
994 coro_setup_op.op_type = OP_ENTERSUB;
995 coro_setup_op.op_ppaddr = pp_slf;
996 /* no flags etc. required, as an init function won't be called */
997
998 PL_op = (OP *)&coro_setup_op;
999
1000 /* copy throw, in case it was set before coro_setup */
1001 CORO_THROW = coro->except;
1002
1003 if (expect_false (enable_times))
1004 {
1005 coro_times_update ();
1006 coro_times_sub (coro);
1007 }
1008}
1009
524static void 1010static void
1011coro_unwind_stacks (pTHX)
1012{
1013 if (!IN_DESTRUCT)
1014 {
1015 /* restore all saved variables and stuff */
1016 LEAVE_SCOPE (0);
1017 assert (PL_tmps_floor == -1);
1018
1019 /* free all temporaries */
1020 FREETMPS;
1021 assert (PL_tmps_ix == -1);
1022
1023 /* unwind all extra stacks */
1024 POPSTACK_TO (PL_mainstack);
1025
1026 /* unwind main stack */
1027 dounwind (-1);
1028 }
1029}
1030
1031static void
1032coro_destruct_perl (pTHX_ struct coro *coro)
1033{
1034 SV *svf [9];
1035
1036 {
1037 struct coro *current = SvSTATE_current;
1038
1039 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1040
1041 save_perl (aTHX_ current);
1042 load_perl (aTHX_ coro);
1043
1044 coro_unwind_stacks (aTHX);
1045 coro_destruct_stacks (aTHX);
1046
1047 // now save some sv's to be free'd later
1048 svf [0] = GvSV (PL_defgv);
1049 svf [1] = (SV *)GvAV (PL_defgv);
1050 svf [2] = GvSV (PL_errgv);
1051 svf [3] = (SV *)PL_defoutgv;
1052 svf [4] = PL_rs;
1053 svf [5] = GvSV (irsgv);
1054 svf [6] = (SV *)GvHV (PL_hintgv);
1055 svf [7] = PL_diehook;
1056 svf [8] = PL_warnhook;
1057 assert (9 == sizeof (svf) / sizeof (*svf));
1058
1059 load_perl (aTHX_ current);
1060 }
1061
1062 {
1063 unsigned int i;
1064
1065 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1066 SvREFCNT_dec (svf [i]);
1067
1068 SvREFCNT_dec (coro->saved_deffh);
1069 SvREFCNT_dec (coro->rouse_cb);
1070 SvREFCNT_dec (coro->invoke_cb);
1071 SvREFCNT_dec (coro->invoke_av);
1072 }
1073}
1074
1075INLINE void
525free_coro_mortal () 1076free_coro_mortal (pTHX)
526{ 1077{
527 if (coro_mortal) 1078 if (expect_true (coro_mortal))
528 { 1079 {
529 SvREFCNT_dec (coro_mortal); 1080 SvREFCNT_dec (coro_mortal);
530 coro_mortal = 0; 1081 coro_mortal = 0;
531 } 1082 }
532} 1083}
533 1084
1085static int
1086runops_trace (pTHX)
1087{
1088 COP *oldcop = 0;
1089 int oldcxix = -2;
1090
1091 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1092 {
1093 PERL_ASYNC_CHECK ();
1094
1095 if (cctx_current->flags & CC_TRACE_ALL)
1096 {
1097 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1098 {
1099 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1100 SV **bot, **top;
1101 AV *av = newAV (); /* return values */
1102 SV **cb;
1103 dSP;
1104
1105 GV *gv = CvGV (cx->blk_sub.cv);
1106 SV *fullname = sv_2mortal (newSV (0));
1107 if (isGV (gv))
1108 gv_efullname3 (fullname, gv, 0);
1109
1110 bot = PL_stack_base + cx->blk_oldsp + 1;
1111 top = cx->blk_gimme == G_ARRAY ? SP + 1
1112 : cx->blk_gimme == G_SCALAR ? bot + 1
1113 : bot;
1114
1115 av_extend (av, top - bot);
1116 while (bot < top)
1117 av_push (av, SvREFCNT_inc_NN (*bot++));
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 ENTER;
1121 SAVETMPS;
1122 EXTEND (SP, 3);
1123 PUSHMARK (SP);
1124 PUSHs (&PL_sv_no);
1125 PUSHs (fullname);
1126 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1127 PUTBACK;
1128 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1129 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1130 SPAGAIN;
1131 FREETMPS;
1132 LEAVE;
1133 PL_runops = runops_trace;
1134 }
1135
1136 if (oldcop != PL_curcop)
1137 {
1138 oldcop = PL_curcop;
1139
1140 if (PL_curcop != &PL_compiling)
1141 {
1142 SV **cb;
1143
1144 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1145 {
1146 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1147
1148 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1149 {
1150 dSP;
1151 GV *gv = CvGV (cx->blk_sub.cv);
1152 SV *fullname = sv_2mortal (newSV (0));
1153
1154 if (isGV (gv))
1155 gv_efullname3 (fullname, gv, 0);
1156
1157 PL_runops = RUNOPS_DEFAULT;
1158 ENTER;
1159 SAVETMPS;
1160 EXTEND (SP, 3);
1161 PUSHMARK (SP);
1162 PUSHs (&PL_sv_yes);
1163 PUSHs (fullname);
1164 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1165 PUTBACK;
1166 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1167 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1168 SPAGAIN;
1169 FREETMPS;
1170 LEAVE;
1171 PL_runops = runops_trace;
1172 }
1173
1174 oldcxix = cxstack_ix;
1175 }
1176
1177 if (cctx_current->flags & CC_TRACE_LINE)
1178 {
1179 dSP;
1180
1181 PL_runops = RUNOPS_DEFAULT;
1182 ENTER;
1183 SAVETMPS;
1184 EXTEND (SP, 3);
1185 PL_runops = RUNOPS_DEFAULT;
1186 PUSHMARK (SP);
1187 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1188 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1189 PUTBACK;
1190 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1191 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1192 SPAGAIN;
1193 FREETMPS;
1194 LEAVE;
1195 PL_runops = runops_trace;
1196 }
1197 }
1198 }
1199 }
1200 }
1201
1202 TAINT_NOT;
1203 return 0;
1204}
1205
1206static struct CoroSLF cctx_ssl_frame;
1207
1208static void
1209slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1210{
1211 ta->prev = 0;
1212}
1213
1214static int
1215slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1216{
1217 *frame = cctx_ssl_frame;
1218
1219 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1220}
1221
1222/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
534static void NOINLINE 1223static void NOINLINE
535prepare_cctx (coro_cctx *cctx) 1224cctx_prepare (pTHX)
536{ 1225{
537 dSP;
538 LOGOP myop;
539
540 Zero (&myop, 1, LOGOP);
541 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545
546 PUSHMARK (SP);
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN;
551}
552
553static void
554coro_run (void *arg)
555{
556 /* coro_run is the alternative epilogue of transfer() */
557 UNLOCK;
558
559 /*
560 * this is a _very_ stripped down perl interpreter ;)
561 */
562 PL_top_env = &PL_start_env; 1226 PL_top_env = &PL_start_env;
563 1227
1228 if (cctx_current->flags & CC_TRACE)
1229 PL_runops = runops_trace;
1230
1231 /* we already must be executing an SLF op, there is no other valid way
1232 * that can lead to creation of a new cctx */
1233 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1234 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1235
1236 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1237 cctx_ssl_frame = slf_frame;
1238
1239 slf_frame.prepare = slf_prepare_set_stacklevel;
1240 slf_frame.check = slf_check_set_stacklevel;
1241}
1242
1243/* the tail of transfer: execute stuff we can only do after a transfer */
1244INLINE void
1245transfer_tail (pTHX)
1246{
1247 free_coro_mortal (aTHX);
1248}
1249
1250/*
1251 * this is a _very_ stripped down perl interpreter ;)
1252 */
1253static void
1254cctx_run (void *arg)
1255{
1256#ifdef USE_ITHREADS
1257# if CORO_PTHREAD
1258 PERL_SET_CONTEXT (coro_thx);
1259# endif
1260#endif
1261 {
1262 dTHX;
1263
1264 /* normally we would need to skip the entersub here */
1265 /* not doing so will re-execute it, which is exactly what we want */
1266 /* PL_nop = PL_nop->op_next */
1267
564 /* inject call to cctx_init */ 1268 /* inject a fake subroutine call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg); 1269 cctx_prepare (aTHX);
566 1270
1271 /* cctx_run is the alternative tail of transfer() */
1272 transfer_tail (aTHX);
1273
567 /* somebody will hit me for both perl_run and PL_restartop */ 1274 /* somebody or something will hit me for both perl_run and PL_restartop */
1275 PL_restartop = PL_op;
568 perl_run (PL_curinterp); 1276 perl_run (PL_curinterp);
1277 /*
1278 * Unfortunately, there is no way to get at the return values of the
1279 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1280 * runtime errors here, as this is just a random interpreter, not a thread.
1281 */
569 1282
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1283 /*
571 abort (); 1284 * If perl-run returns we assume exit() was being called or the coro
1285 * fell off the end, which seems to be the only valid (non-bug)
1286 * reason for perl_run to return. We try to exit by jumping to the
1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1291 */
1292 PL_top_env = main_top_env;
1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
572} 1295}
573 1296
574static coro_cctx * 1297static coro_cctx *
575cctx_new () 1298cctx_new ()
576{ 1299{
577 coro_cctx *cctx; 1300 coro_cctx *cctx;
578 1301
579 ++cctx_count; 1302 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx); 1303 New (0, cctx, 1, coro_cctx);
582 1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1329 void *stack_start;
1330 size_t stack_size;
1331
583#if HAVE_MMAP 1332#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */ 1334 /* mmap supposedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 1336
589 if (cctx->sptr == (void *)-1) 1337 if (cctx->sptr != (void *)-1)
590 {
591 perror ("FATAL: unable to mmap stack for coroutine");
592 _exit (EXIT_FAILURE);
593 } 1338 {
594 1339 #if CORO_STACKGUARD
595# if STACKGUARD
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597# endif 1341 #endif
598 1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
599#else 1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
600 1344 cctx->flags |= CC_MAPPED;
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr)
605 { 1345 }
606 perror ("FATAL: unable to malloc stack for coroutine"); 1346 else
607 _exit (EXIT_FAILURE);
608 }
609
610#endif 1347#endif
1348 {
1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1350 New (0, cctx->sptr, cctx_stacksize, long);
611 1351
1352 if (!cctx->sptr)
1353 {
1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1355 _exit (EXIT_FAILURE);
1356 }
1357
1358 stack_start = cctx->sptr;
1359 stack_size = cctx->ssize;
1360 }
1361
612#if USE_VALGRIND 1362 #if CORO_USE_VALGRIND
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif 1364 #endif
618 1365
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
620 1367
621 return cctx; 1368 return cctx;
622} 1369}
623 1370
624static void 1371static void
625cctx_destroy (coro_cctx *cctx) 1372cctx_destroy (coro_cctx *cctx)
626{ 1373{
627 if (!cctx) 1374 if (!cctx)
628 return; 1375 return;
629 1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
630 --cctx_count; 1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
631 1381
632#if USE_VALGRIND 1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1385 #if CORO_USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
634#endif 1393#endif
635
636#if HAVE_MMAP
637 munmap (cctx->sptr, cctx->ssize);
638#else
639 Safefree (cctx->sptr); 1394 Safefree (cctx->sptr);
640#endif 1395 }
641 1396
642 Safefree (cctx); 1397 Safefree (cctx);
643} 1398}
644 1399
1400/* wether this cctx should be destructed */
1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1402
645static coro_cctx * 1403static coro_cctx *
646cctx_get () 1404cctx_get (pTHX)
647{ 1405{
648 coro_cctx *cctx; 1406 while (expect_true (cctx_first))
649
650 if (cctx_first)
651 { 1407 {
652 cctx = cctx_first; 1408 coro_cctx *cctx = cctx_first;
653 cctx_first = cctx->next; 1409 cctx_first = cctx->next;
654 --cctx_idle; 1410 --cctx_idle;
655 } 1411
656 else 1412 if (expect_true (!CCTX_EXPIRED (cctx)))
657 { 1413 return cctx;
658 cctx = cctx_new (); 1414
659 PL_op = PL_op->op_next; 1415 cctx_destroy (cctx);
660 } 1416 }
661 1417
662 return cctx; 1418 return cctx_new_run ();
663} 1419}
664 1420
665static void 1421static void
666cctx_put (coro_cctx *cctx) 1422cctx_put (coro_cctx *cctx)
667{ 1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
668 /* free another cctx if overlimit */ 1426 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX) 1427 if (expect_false (cctx_idle >= cctx_max_idle))
670 { 1428 {
671 coro_cctx *first = cctx_first; 1429 coro_cctx *first = cctx_first;
672 cctx_first = first->next; 1430 cctx_first = first->next;
673 --cctx_idle; 1431 --cctx_idle;
674 1432
675 assert (!first->inuse);
676 cctx_destroy (first); 1433 cctx_destroy (first);
677 } 1434 }
678 1435
679 ++cctx_idle; 1436 ++cctx_idle;
680 cctx->next = cctx_first; 1437 cctx->next = cctx_first;
681 cctx_first = cctx; 1438 cctx_first = cctx;
682} 1439}
683 1440
684/* never call directly, always through the coro_state_transfer global variable */ 1441/** coroutine switching *****************************************************/
685static void NOINLINE 1442
1443static void
1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1448 if (expect_true (prev != next))
1449 {
1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1452
1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1455
1456#if !PERL_VERSION_ATLEAST (5,10,0)
1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1459#endif
1460 }
1461}
1462
1463/* always use the TRANSFER macro */
1464static void NOINLINE /* noinline so we have a fixed stackframe */
686transfer (struct coro *prev, struct coro *next, int flags) 1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
687{ 1466{
688 dSTACKLEVEL; 1467 dSTACKLEVEL;
689 1468
690 /* sometimes transfer is only called to set idle_sp */ 1469 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL) 1470 if (expect_false (!prev))
1471 {
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1472 cctx_current->idle_sp = STACKLEVEL;
693 else if (prev != next) 1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
694 { 1474 }
1475 else if (expect_true (prev != next))
1476 {
695 coro_cctx *prev__cctx; 1477 coro_cctx *cctx_prev;
696 1478
697 if (prev->flags & CF_NEW) 1479 if (expect_false (prev->flags & CF_NEW))
698 { 1480 {
699 /* create a new empty context */ 1481 /* create a new empty/source context */
700 Newz (0, prev->cctx, 1, coro_cctx);
701 prev->cctx->inuse = 1;
702 prev->flags &= ~CF_NEW; 1482 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING; 1483 prev->flags |= CF_RUNNING;
704 } 1484 }
705 1485
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING; 1486 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING; 1487 next->flags |= CF_RUNNING;
715 1488
716 LOCK; 1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
717 1491
718 if (next->flags & CF_NEW) 1492 if (expect_false (next->flags & CF_NEW))
719 { 1493 {
720 /* need to start coroutine */ 1494 /* need to start coroutine */
721 next->flags &= ~CF_NEW; 1495 next->flags &= ~CF_NEW;
722 /* first get rid of the old state */
723 SAVE (prev, -1);
724 /* setup coroutine call */ 1496 /* setup coroutine call */
725 setup_coro (next); 1497 coro_setup (aTHX_ next);
726 /* need a new stack */
727 assert (!next->stack);
728 } 1498 }
729 else 1499 else
1500 load_perl (aTHX_ next);
1501
1502 /* possibly untie and reuse the cctx */
1503 if (expect_true (
1504 cctx_current->idle_sp == STACKLEVEL
1505 && !(cctx_current->flags & CC_TRACE)
1506 && !force_cctx
1507 ))
730 { 1508 {
731 /* coroutine already started */ 1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
732 SAVE (prev, flags); 1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
733 LOAD (next); 1511
1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1515 if (expect_true (!next->cctx))
1516 next->cctx = cctx_get (aTHX);
1517
1518 cctx_put (cctx_current);
734 } 1519 }
1520 else
1521 prev->cctx = cctx_current;
735 1522
736 prev__cctx = prev->cctx; 1523 ++next->usecount;
737 1524
738 /* possibly "free" the cctx */ 1525 cctx_prev = cctx_current;
739 if (prev__cctx->idle_sp == STACKLEVEL && 0) 1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1527
1528 next->cctx = 0;
1529
1530 if (expect_false (cctx_prev != cctx_current))
740 { 1531 {
741 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1532 cctx_prev->top_env = PL_top_env;
742 assert (PL_top_env == prev__cctx->top_env); 1533 PL_top_env = cctx_current->top_env;
743 1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
744 prev->cctx = 0;
745
746 cctx_put (prev__cctx);
747 prev__cctx->inuse = 0;
748 } 1535 }
749 1536
750 if (!next->cctx) 1537 transfer_tail (aTHX);
751 {
752 next->cctx = cctx_get ();
753 assert (!next->cctx->inuse);
754 next->cctx->inuse = 1;
755 }
756
757 if (prev__cctx != next->cctx)
758 {
759 prev__cctx->top_env = PL_top_env;
760 PL_top_env = next->cctx->top_env;
761 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762 }
763
764 free_coro_mortal ();
765
766 UNLOCK;
767 } 1538 }
768} 1539}
769 1540
770struct transfer_args 1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
771{
772 struct coro *prev, *next;
773 int flags;
774};
775
776#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
777 1543
1544/** high level stuff ********************************************************/
1545
778static void 1546static int
779coro_state_destroy (struct coro *coro) 1547coro_state_destroy (pTHX_ struct coro *coro)
780{ 1548{
781 if (coro->refcnt--) 1549 if (coro->flags & CF_DESTROYED)
782 return; 1550 return 0;
783 1551
784 if (coro->mainstack && coro->mainstack != main_mainstack) 1552 if (coro->on_destroy && !PL_dirty)
785 { 1553 coro->on_destroy (aTHX_ coro);
786 struct coro temp;
787 1554
1555 coro->flags |= CF_DESTROYED;
1556
788 if (coro->flags & CF_RUNNING) 1557 if (coro->flags & CF_READY)
789 croak ("FATAL: tried to destroy currently running coroutine");
790
791 SAVE ((&temp), TRANSFER_SAVE_ALL);
792 LOAD (coro);
793
794 coro_destroy_stacks ();
795
796 LOAD ((&temp)); /* this will get rid of defsv etc.. */
797
798 coro->mainstack = 0;
799 } 1558 {
1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1560 /* alternative: look through all ready queues and remove the coro */
1561 --coro_nready;
1562 }
1563 else
1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1565
1566 if (coro->mainstack
1567 && coro->mainstack != main_mainstack
1568 && coro->slot
1569 && !PL_dirty)
1570 coro_destruct_perl (aTHX_ coro);
800 1571
801 cctx_destroy (coro->cctx); 1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
802 SvREFCNT_dec (coro->args); 1574 SvREFCNT_dec (coro->args);
803 Safefree (coro); 1575 SvREFCNT_dec (CORO_THROW);
1576
1577 if (coro->next) coro->next->prev = coro->prev;
1578 if (coro->prev) coro->prev->next = coro->next;
1579 if (coro == coro_first) coro_first = coro->next;
1580
1581 return 1;
804} 1582}
805 1583
806static int 1584static int
807coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1585coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808{ 1586{
809 struct coro *coro = (struct coro *)mg->mg_ptr; 1587 struct coro *coro = (struct coro *)mg->mg_ptr;
810 mg->mg_ptr = 0; 1588 mg->mg_ptr = 0;
811 1589
1590 coro->hv = 0;
1591
1592 if (--coro->refcnt < 0)
1593 {
812 coro_state_destroy (coro); 1594 coro_state_destroy (aTHX_ coro);
1595 Safefree (coro);
1596 }
813 1597
814 return 0; 1598 return 0;
815} 1599}
816 1600
817static int 1601static int
… …
824 return 0; 1608 return 0;
825} 1609}
826 1610
827static MGVTBL coro_state_vtbl = { 1611static MGVTBL coro_state_vtbl = {
828 0, 0, 0, 0, 1612 0, 0, 0, 0,
829 coro_state_clear, 1613 coro_state_free,
830 0, 1614 0,
831#ifdef MGf_DUP 1615#ifdef MGf_DUP
832 coro_state_dup, 1616 coro_state_dup,
833#else 1617#else
834# define MGf_DUP 0 1618# define MGf_DUP 0
835#endif 1619#endif
836}; 1620};
837 1621
838static struct coro *
839SvSTATE (SV *coro)
840{
841 HV *stash;
842 MAGIC *mg;
843
844 if (SvROK (coro))
845 coro = SvRV (coro);
846
847 stash = SvSTASH (coro);
848 if (stash != coro_stash && stash != coro_state_stash)
849 {
850 /* very slow, but rare, check */
851 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852 croak ("Coro::State object required");
853 }
854
855 mg = SvMAGIC (coro);
856 assert (mg->mg_type == PERL_MAGIC_ext);
857 return (struct coro *)mg->mg_ptr;
858}
859
860static void 1622static void
861prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
862{ 1624{
863 ta->prev = SvSTATE (prev); 1625 ta->prev = SvSTATE (prev_sv);
864 ta->next = SvSTATE (next); 1626 ta->next = SvSTATE (next_sv);
865 ta->flags = flags; 1627 TRANSFER_CHECK (*ta);
866} 1628}
867 1629
868static void 1630static void
869api_transfer (SV *prev, SV *next, int flags) 1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
870{ 1632{
871 struct transfer_args ta; 1633 struct coro_transfer_args ta;
872 1634
873 prepare_transfer (&ta, prev, next, flags); 1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874 TRANSFER (ta); 1636 TRANSFER (ta, 1);
875} 1637}
876 1638
877/** Coro ********************************************************************/ 1639/** Coro ********************************************************************/
878 1640
879#define PRIO_MAX 3 1641INLINE void
880#define PRIO_HIGH 1 1642coro_enq (pTHX_ struct coro *coro)
881#define PRIO_NORMAL 0
882#define PRIO_LOW -1
883#define PRIO_IDLE -3
884#define PRIO_MIN -4
885
886/* for Coro.pm */
887static SV *coro_current;
888static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889static int coro_nready;
890
891static void
892coro_enq (SV *coro_sv)
893{ 1643{
894 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
895 coro_nready++;
896}
897 1645
898static SV * 1646 SvREFCNT_inc_NN (coro->hv);
899coro_deq (int min_prio)
900{
901 int prio = PRIO_MAX - PRIO_MIN;
902 1647
903 min_prio -= PRIO_MIN; 1648 coro->next_ready = 0;
904 if (min_prio < 0) 1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
905 min_prio = 0; 1650 ready [1] = coro;
1651}
906 1652
1653INLINE struct coro *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
907 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
908 if (AvFILLp (coro_ready [prio]) >= 0) 1659 {
1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
909 { 1663 {
910 coro_nready--; 1664 struct coro *coro = ready [0];
911 return av_shift (coro_ready [prio]); 1665 ready [0] = coro->next_ready;
1666 return coro;
912 } 1667 }
1668 }
913 1669
914 return 0; 1670 return 0;
915} 1671}
916 1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
1676 dTHX;
1677 dSP;
1678
1679 ENTER;
1680 SAVETMPS;
1681
1682 PUSHMARK (SP);
1683 PUTBACK;
1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1685
1686 FREETMPS;
1687 LEAVE;
1688}
1689
917static int 1690static int
918api_ready (SV *coro_sv) 1691api_ready (pTHX_ SV *coro_sv)
919{ 1692{
920 struct coro *coro;
921
922 if (SvROK (coro_sv))
923 coro_sv = SvRV (coro_sv);
924
925 coro = SvSTATE (coro_sv); 1693 struct coro *coro = SvSTATE (coro_sv);
926 1694
927 if (coro->flags & CF_READY) 1695 if (coro->flags & CF_READY)
928 return 0; 1696 return 0;
929 1697
930#if 0 /* this is actually harmless */ 1698 coro->flags |= CF_READY;
1699
1700 coro_enq (aTHX_ coro);
1701
1702 if (!coro_nready++)
1703 if (coroapi.readyhook)
1704 coroapi.readyhook ();
1705
1706 return 1;
1707}
1708
1709static int
1710api_is_ready (pTHX_ SV *coro_sv)
1711{
1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1713}
1714
1715/* expects to own a reference to next->hv */
1716INLINE void
1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1718{
1719 SV *prev_sv = SvRV (coro_current);
1720
1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1724 TRANSFER_CHECK (*ta);
1725
1726 SvRV_set (coro_current, (SV *)next->hv);
1727
1728 free_coro_mortal (aTHX);
1729 coro_mortal = prev_sv;
1730}
1731
1732static void
1733prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1734{
1735 for (;;)
1736 {
1737 struct coro *next = coro_deq (aTHX);
1738
1739 if (expect_true (next))
1740 {
1741 /* cannot transfer to destroyed coros, skip and look for next */
1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1743 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1744 else
1745 {
1746 next->flags &= ~CF_READY;
1747 --coro_nready;
1748
1749 prepare_schedule_to (aTHX_ ta, next);
1750 break;
1751 }
1752 }
1753 else
1754 {
1755 /* nothing to schedule: call the idle handler */
1756 if (SvROK (sv_idle)
1757 && SvOBJECT (SvRV (sv_idle)))
1758 {
1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1760 api_ready (aTHX_ SvRV (sv_idle));
1761 --coro_nready;
1762 }
1763 else
1764 {
1765 dSP;
1766
1767 ENTER;
1768 SAVETMPS;
1769
1770 PUSHMARK (SP);
1771 PUTBACK;
1772 call_sv (sv_idle, G_VOID | G_DISCARD);
1773
1774 FREETMPS;
1775 LEAVE;
1776 }
1777 }
1778 }
1779}
1780
1781INLINE void
1782prepare_cede (pTHX_ struct coro_transfer_args *ta)
1783{
1784 api_ready (aTHX_ coro_current);
1785 prepare_schedule (aTHX_ ta);
1786}
1787
1788INLINE void
1789prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1790{
1791 SV *prev = SvRV (coro_current);
1792
1793 if (coro_nready)
1794 {
1795 prepare_schedule (aTHX_ ta);
1796 api_ready (aTHX_ prev);
1797 }
1798 else
1799 prepare_nop (aTHX_ ta);
1800}
1801
1802static void
1803api_schedule (pTHX)
1804{
1805 struct coro_transfer_args ta;
1806
1807 prepare_schedule (aTHX_ &ta);
1808 TRANSFER (ta, 1);
1809}
1810
1811static void
1812api_schedule_to (pTHX_ SV *coro_sv)
1813{
1814 struct coro_transfer_args ta;
1815 struct coro *next = SvSTATE (coro_sv);
1816
1817 SvREFCNT_inc_NN (coro_sv);
1818 prepare_schedule_to (aTHX_ &ta, next);
1819}
1820
1821static int
1822api_cede (pTHX)
1823{
1824 struct coro_transfer_args ta;
1825
1826 prepare_cede (aTHX_ &ta);
1827
1828 if (expect_true (ta.prev != ta.next))
1829 {
1830 TRANSFER (ta, 1);
1831 return 1;
1832 }
1833 else
1834 return 0;
1835}
1836
1837static int
1838api_cede_notself (pTHX)
1839{
1840 if (coro_nready)
1841 {
1842 struct coro_transfer_args ta;
1843
1844 prepare_cede_notself (aTHX_ &ta);
1845 TRANSFER (ta, 1);
1846 return 1;
1847 }
1848 else
1849 return 0;
1850}
1851
1852static void
1853api_trace (pTHX_ SV *coro_sv, int flags)
1854{
1855 struct coro *coro = SvSTATE (coro_sv);
1856
931 if (coro->flags & CF_RUNNING) 1857 if (coro->flags & CF_RUNNING)
932 croak ("Coro::ready called on currently running coroutine"); 1858 croak ("cannot enable tracing on a running coroutine, caught");
933#endif
934 1859
935 coro->flags |= CF_READY; 1860 if (flags & CC_TRACE)
1861 {
1862 if (!coro->cctx)
1863 coro->cctx = cctx_new_run ();
1864 else if (!(coro->cctx->flags & CC_TRACE))
1865 croak ("cannot enable tracing on coroutine with custom stack, caught");
936 1866
937 LOCK; 1867 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
938 coro_enq (SvREFCNT_inc (coro_sv)); 1868 }
939 UNLOCK; 1869 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1870 {
1871 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
940 1872
941 return 1; 1873 if (coro->flags & CF_RUNNING)
1874 PL_runops = RUNOPS_DEFAULT;
1875 else
1876 coro->slot->runops = RUNOPS_DEFAULT;
1877 }
942} 1878}
1879
1880static void
1881coro_call_on_destroy (pTHX_ struct coro *coro)
1882{
1883 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1884 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1885
1886 if (on_destroyp)
1887 {
1888 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1889
1890 while (AvFILLp (on_destroy) >= 0)
1891 {
1892 dSP; /* don't disturb outer sp */
1893 SV *cb = av_pop (on_destroy);
1894
1895 PUSHMARK (SP);
1896
1897 if (statusp)
1898 {
1899 int i;
1900 AV *status = (AV *)SvRV (*statusp);
1901 EXTEND (SP, AvFILLp (status) + 1);
1902
1903 for (i = 0; i <= AvFILLp (status); ++i)
1904 PUSHs (AvARRAY (status)[i]);
1905 }
1906
1907 PUTBACK;
1908 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1909 }
1910 }
1911}
1912
1913static void
1914slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1915{
1916 int i;
1917 HV *hv = (HV *)SvRV (coro_current);
1918 AV *av = newAV ();
1919
1920 /* items are actually not so common, so optimise for this case */
1921 if (items)
1922 {
1923 av_extend (av, items - 1);
1924
1925 for (i = 0; i < items; ++i)
1926 av_push (av, SvREFCNT_inc_NN (arg [i]));
1927 }
1928
1929 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1930
1931 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1932 api_ready (aTHX_ sv_manager);
1933
1934 frame->prepare = prepare_schedule;
1935 frame->check = slf_check_repeat;
1936
1937 /* as a minor optimisation, we could unwind all stacks here */
1938 /* but that puts extra pressure on pp_slf, and is not worth much */
1939 /*coro_unwind_stacks (aTHX);*/
1940}
1941
1942/*****************************************************************************/
1943/* async pool handler */
943 1944
944static int 1945static int
945api_is_ready (SV *coro_sv) 1946slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
946{ 1947{
947 return !!SvSTATE (coro_sv)->flags & CF_READY; 1948 HV *hv = (HV *)SvRV (coro_current);
948} 1949 struct coro *coro = (struct coro *)frame->data;
949 1950
950static void 1951 if (!coro->invoke_cb)
951prepare_schedule (struct transfer_args *ta) 1952 return 1; /* loop till we have invoke */
952{ 1953 else
953 SV *prev, *next;
954
955 for (;;)
956 { 1954 {
957 LOCK; 1955 hv_store (hv, "desc", sizeof ("desc") - 1,
958 next = coro_deq (PRIO_MIN); 1956 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
959 UNLOCK;
960 1957
961 if (next) 1958 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
962 break;
963 1959
964 { 1960 {
965 dSP; 1961 dSP;
966 1962 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
967 ENTER;
968 SAVETMPS;
969
970 PUSHMARK (SP);
971 PUTBACK; 1963 PUTBACK;
972 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974 FREETMPS;
975 LEAVE;
976 } 1964 }
1965
1966 SvREFCNT_dec (GvAV (PL_defgv));
1967 GvAV (PL_defgv) = coro->invoke_av;
1968 coro->invoke_av = 0;
1969
1970 return 0;
1971 }
1972}
1973
1974static void
1975slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1976{
1977 HV *hv = (HV *)SvRV (coro_current);
1978 struct coro *coro = SvSTATE_hv ((SV *)hv);
1979
1980 if (expect_true (coro->saved_deffh))
977 } 1981 {
1982 /* subsequent iteration */
1983 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1984 coro->saved_deffh = 0;
978 1985
1986 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1987 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1988 {
1989 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1990 coro->invoke_av = newAV ();
1991
1992 frame->prepare = prepare_nop;
1993 }
1994 else
1995 {
1996 av_clear (GvAV (PL_defgv));
1997 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (aTHX_ coro_current, 0);
2003
2004 frame->prepare = prepare_schedule;
2005 av_push (av_async_pool, SvREFCNT_inc (hv));
2006 }
2007 }
2008 else
2009 {
2010 /* first iteration, simply fall through */
2011 frame->prepare = prepare_nop;
2012 }
2013
2014 frame->check = slf_check_pool_handler;
2015 frame->data = (void *)coro;
2016}
2017
2018/*****************************************************************************/
2019/* rouse callback */
2020
2021#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2022
2023static void
2024coro_rouse_callback (pTHX_ CV *cv)
2025{
2026 dXSARGS;
2027 SV *data = (SV *)S_GENSUB_ARG;
2028
2029 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2030 {
2031 /* first call, set args */
2032 SV *coro = SvRV (data);
2033 AV *av = newAV ();
2034
2035 SvRV_set (data, (SV *)av);
2036
2037 /* better take a full copy of the arguments */
2038 while (items--)
2039 av_store (av, items, newSVsv (ST (items)));
2040
2041 api_ready (aTHX_ coro);
2042 SvREFCNT_dec (coro);
2043 }
2044
2045 XSRETURN_EMPTY;
2046}
2047
2048static int
2049slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2050{
2051 SV *data = (SV *)frame->data;
2052
2053 if (CORO_THROW)
2054 return 0;
2055
2056 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2057 return 1;
2058
2059 /* now push all results on the stack */
2060 {
2061 dSP;
2062 AV *av = (AV *)SvRV (data);
2063 int i;
2064
2065 EXTEND (SP, AvFILLp (av) + 1);
2066 for (i = 0; i <= AvFILLp (av); ++i)
2067 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2068
2069 /* we have stolen the elements, so set length to zero and free */
2070 AvFILLp (av) = -1;
2071 av_undef (av);
2072
2073 PUTBACK;
2074 }
2075
2076 return 0;
2077}
2078
2079static void
2080slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2081{
2082 SV *cb;
2083
2084 if (items)
2085 cb = arg [0];
2086 else
2087 {
2088 struct coro *coro = SvSTATE_current;
2089
2090 if (!coro->rouse_cb)
2091 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2092
2093 cb = sv_2mortal (coro->rouse_cb);
2094 coro->rouse_cb = 0;
2095 }
2096
2097 if (!SvROK (cb)
2098 || SvTYPE (SvRV (cb)) != SVt_PVCV
2099 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2100 croak ("Coro::rouse_wait called with illegal callback argument,");
2101
2102 {
2103 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
2106 frame->data = (void *)data;
2107 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2108 frame->check = slf_check_rouse_wait;
2109 }
2110}
2111
2112static SV *
2113coro_new_rouse_cb (pTHX)
2114{
979 prev = SvRV (coro_current); 2115 HV *hv = (HV *)SvRV (coro_current);
980 SvRV_set (coro_current, next); 2116 struct coro *coro = SvSTATE_hv (hv);
2117 SV *data = newRV_inc ((SV *)hv);
2118 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
981 2119
982 /* free this only after the transfer */ 2120 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
983 LOCK; 2121 SvREFCNT_dec (data); /* magicext increases the refcount */
984 free_coro_mortal ();
985 UNLOCK;
986 coro_mortal = prev;
987 2122
988 assert (!SvROK(prev));//D 2123 SvREFCNT_dec (coro->rouse_cb);
989 assert (!SvROK(next));//D 2124 coro->rouse_cb = SvREFCNT_inc_NN (cb);
990 2125
991 ta->prev = SvSTATE (prev); 2126 return cb;
992 ta->next = SvSTATE (next);
993 ta->flags = TRANSFER_SAVE_ALL;
994
995 assert (ta->flags & CF_READY);
996 ta->next->flags &= ~CF_READY;
997} 2127}
998 2128
2129/*****************************************************************************/
2130/* schedule-like-function opcode (SLF) */
2131
2132static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2133static const CV *slf_cv;
2134static SV **slf_argv;
2135static int slf_argc, slf_arga; /* count, allocated */
2136static I32 slf_ax; /* top of stack, for restore */
2137
2138/* this restores the stack in the case we patched the entersub, to */
2139/* recreate the stack frame as perl will on following calls */
2140/* since entersub cleared the stack */
2141static OP *
2142pp_restore (pTHX)
2143{
2144 int i;
2145 SV **SP = PL_stack_base + slf_ax;
2146
2147 PUSHMARK (SP);
2148
2149 EXTEND (SP, slf_argc + 1);
2150
2151 for (i = 0; i < slf_argc; ++i)
2152 PUSHs (sv_2mortal (slf_argv [i]));
2153
2154 PUSHs ((SV *)CvGV (slf_cv));
2155
2156 RETURNOP (slf_restore.op_first);
2157}
2158
999static void 2159static void
2160slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2161{
2162 SV **arg = (SV **)slf_frame.data;
2163
2164 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2165}
2166
2167static void
2168slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2169{
2170 if (items != 2)
2171 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2172
2173 frame->prepare = slf_prepare_transfer;
2174 frame->check = slf_check_nop;
2175 frame->data = (void *)arg; /* let's hope it will stay valid */
2176}
2177
2178static void
2179slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 frame->prepare = prepare_schedule;
2182 frame->check = slf_check_nop;
2183}
2184
2185static void
1000prepare_cede (struct transfer_args *ta) 2186slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1001{ 2187{
2188 struct coro *next = (struct coro *)slf_frame.data;
2189
2190 SvREFCNT_inc_NN (next->hv);
2191 prepare_schedule_to (aTHX_ ta, next);
2192}
2193
2194static void
2195slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 if (!items)
2198 croak ("Coro::schedule_to expects a coroutine argument, caught");
2199
2200 frame->data = (void *)SvSTATE (arg [0]);
2201 frame->prepare = slf_prepare_schedule_to;
2202 frame->check = slf_check_nop;
2203}
2204
2205static void
2206slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
1002 api_ready (coro_current); 2208 api_ready (aTHX_ SvRV (coro_current));
1003 2209
1004 prepare_schedule (ta); 2210 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1005} 2211}
1006 2212
1007static void 2213static void
1008api_schedule (void) 2214slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1009{ 2215{
2216 frame->prepare = prepare_cede;
2217 frame->check = slf_check_nop;
2218}
2219
2220static void
2221slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2222{
2223 frame->prepare = prepare_cede_notself;
2224 frame->check = slf_check_nop;
2225}
2226
2227/*
2228 * these not obviously related functions are all rolled into one
2229 * function to increase chances that they all will call transfer with the same
2230 * stack offset
2231 * SLF stands for "schedule-like-function".
2232 */
2233static OP *
2234pp_slf (pTHX)
2235{
2236 I32 checkmark; /* mark SP to see how many elements check has pushed */
2237
2238 /* set up the slf frame, unless it has already been set-up */
2239 /* the latter happens when a new coro has been started */
2240 /* or when a new cctx was attached to an existing coroutine */
2241 if (expect_true (!slf_frame.prepare))
2242 {
2243 /* first iteration */
2244 dSP;
2245 SV **arg = PL_stack_base + TOPMARK + 1;
2246 int items = SP - arg; /* args without function object */
2247 SV *gv = *sp;
2248
2249 /* do a quick consistency check on the "function" object, and if it isn't */
2250 /* for us, divert to the real entersub */
2251 if (SvTYPE (gv) != SVt_PVGV
2252 || !GvCV (gv)
2253 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2254 return PL_ppaddr[OP_ENTERSUB](aTHX);
2255
2256 if (!(PL_op->op_flags & OPf_STACKED))
2257 {
2258 /* ampersand-form of call, use @_ instead of stack */
2259 AV *av = GvAV (PL_defgv);
2260 arg = AvARRAY (av);
2261 items = AvFILLp (av) + 1;
2262 }
2263
2264 /* now call the init function, which needs to set up slf_frame */
2265 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2266 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2267
2268 /* pop args */
2269 SP = PL_stack_base + POPMARK;
2270
2271 PUTBACK;
2272 }
2273
2274 /* now that we have a slf_frame, interpret it! */
2275 /* we use a callback system not to make the code needlessly */
2276 /* complicated, but so we can run multiple perl coros from one cctx */
2277
2278 do
2279 {
1010 struct transfer_args ta; 2280 struct coro_transfer_args ta;
1011 2281
1012 prepare_schedule (&ta); 2282 slf_frame.prepare (aTHX_ &ta);
1013 TRANSFER (ta); 2283 TRANSFER (ta, 0);
1014}
1015 2284
2285 checkmark = PL_stack_sp - PL_stack_base;
2286 }
2287 while (slf_frame.check (aTHX_ &slf_frame));
2288
2289 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2290
2291 /* exception handling */
2292 if (expect_false (CORO_THROW))
2293 {
2294 SV *exception = sv_2mortal (CORO_THROW);
2295
2296 CORO_THROW = 0;
2297 sv_setsv (ERRSV, exception);
2298 croak (0);
2299 }
2300
2301 /* return value handling - mostly like entersub */
2302 /* make sure we put something on the stack in scalar context */
2303 if (GIMME_V == G_SCALAR)
2304 {
2305 dSP;
2306 SV **bot = PL_stack_base + checkmark;
2307
2308 if (sp == bot) /* too few, push undef */
2309 bot [1] = &PL_sv_undef;
2310 else if (sp != bot + 1) /* too many, take last one */
2311 bot [1] = *sp;
2312
2313 SP = bot + 1;
2314
2315 PUTBACK;
2316 }
2317
2318 return NORMAL;
2319}
2320
2321static void
2322api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2323{
2324 int i;
2325 SV **arg = PL_stack_base + ax;
2326 int items = PL_stack_sp - arg + 1;
2327
2328 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2329
2330 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2331 && PL_op->op_ppaddr != pp_slf)
2332 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2333
2334 CvFLAGS (cv) |= CVf_SLF;
2335 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2336 slf_cv = cv;
2337
2338 /* we patch the op, and then re-run the whole call */
2339 /* we have to put the same argument on the stack for this to work */
2340 /* and this will be done by pp_restore */
2341 slf_restore.op_next = (OP *)&slf_restore;
2342 slf_restore.op_type = OP_CUSTOM;
2343 slf_restore.op_ppaddr = pp_restore;
2344 slf_restore.op_first = PL_op;
2345
2346 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2347
2348 if (PL_op->op_flags & OPf_STACKED)
2349 {
2350 if (items > slf_arga)
2351 {
2352 slf_arga = items;
2353 free (slf_argv);
2354 slf_argv = malloc (slf_arga * sizeof (SV *));
2355 }
2356
2357 slf_argc = items;
2358
2359 for (i = 0; i < items; ++i)
2360 slf_argv [i] = SvREFCNT_inc (arg [i]);
2361 }
2362 else
2363 slf_argc = 0;
2364
2365 PL_op->op_ppaddr = pp_slf;
2366 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2367
2368 PL_op = (OP *)&slf_restore;
2369}
2370
2371/*****************************************************************************/
2372/* dynamic wind */
2373
2374static void
2375on_enterleave_call (pTHX_ SV *cb)
2376{
2377 dSP;
2378
2379 PUSHSTACK;
2380
2381 PUSHMARK (SP);
2382 PUTBACK;
2383 call_sv (cb, G_VOID | G_DISCARD);
2384 SPAGAIN;
2385
2386 POPSTACK;
2387}
2388
2389static SV *
2390coro_avp_pop_and_free (pTHX_ AV **avp)
2391{
2392 AV *av = *avp;
2393 SV *res = av_pop (av);
2394
2395 if (AvFILLp (av) < 0)
2396 {
2397 *avp = 0;
2398 SvREFCNT_dec (av);
2399 }
2400
2401 return res;
2402}
2403
2404static void
2405coro_pop_on_enter (pTHX_ void *coro)
2406{
2407 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2408 SvREFCNT_dec (cb);
2409}
2410
2411static void
2412coro_pop_on_leave (pTHX_ void *coro)
2413{
2414 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2415 on_enterleave_call (aTHX_ sv_2mortal (cb));
2416}
2417
2418/*****************************************************************************/
2419/* PerlIO::cede */
2420
2421typedef struct
2422{
2423 PerlIOBuf base;
2424 NV next, every;
2425} PerlIOCede;
2426
2427static IV
2428PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2429{
2430 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2431
2432 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2433 self->next = nvtime () + self->every;
2434
2435 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2436}
2437
2438static SV *
2439PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2440{
2441 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2442
2443 return newSVnv (self->every);
2444}
2445
2446static IV
2447PerlIOCede_flush (pTHX_ PerlIO *f)
2448{
2449 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2450 double now = nvtime ();
2451
2452 if (now >= self->next)
2453 {
2454 api_cede (aTHX);
2455 self->next = now + self->every;
2456 }
2457
2458 return PerlIOBuf_flush (aTHX_ f);
2459}
2460
2461static PerlIO_funcs PerlIO_cede =
2462{
2463 sizeof(PerlIO_funcs),
2464 "cede",
2465 sizeof(PerlIOCede),
2466 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2467 PerlIOCede_pushed,
2468 PerlIOBuf_popped,
2469 PerlIOBuf_open,
2470 PerlIOBase_binmode,
2471 PerlIOCede_getarg,
2472 PerlIOBase_fileno,
2473 PerlIOBuf_dup,
2474 PerlIOBuf_read,
2475 PerlIOBuf_unread,
2476 PerlIOBuf_write,
2477 PerlIOBuf_seek,
2478 PerlIOBuf_tell,
2479 PerlIOBuf_close,
2480 PerlIOCede_flush,
2481 PerlIOBuf_fill,
2482 PerlIOBase_eof,
2483 PerlIOBase_error,
2484 PerlIOBase_clearerr,
2485 PerlIOBase_setlinebuf,
2486 PerlIOBuf_get_base,
2487 PerlIOBuf_bufsiz,
2488 PerlIOBuf_get_ptr,
2489 PerlIOBuf_get_cnt,
2490 PerlIOBuf_set_ptrcnt,
2491};
2492
2493/*****************************************************************************/
2494/* Coro::Semaphore & Coro::Signal */
2495
2496static SV *
2497coro_waitarray_new (pTHX_ int count)
2498{
2499 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2500 AV *av = newAV ();
2501 SV **ary;
2502
2503 /* unfortunately, building manually saves memory */
2504 Newx (ary, 2, SV *);
2505 AvALLOC (av) = ary;
2506#if PERL_VERSION_ATLEAST (5,10,0)
2507 AvARRAY (av) = ary;
2508#else
2509 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2510 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2511 SvPVX ((SV *)av) = (char *)ary;
2512#endif
2513 AvMAX (av) = 1;
2514 AvFILLp (av) = 0;
2515 ary [0] = newSViv (count);
2516
2517 return newRV_noinc ((SV *)av);
2518}
2519
2520/* semaphore */
2521
2522static void
2523coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2524{
2525 SV *count_sv = AvARRAY (av)[0];
2526 IV count = SvIVX (count_sv);
2527
2528 count += adjust;
2529 SvIVX (count_sv) = count;
2530
2531 /* now wake up as many waiters as are expected to lock */
2532 while (count > 0 && AvFILLp (av) > 0)
2533 {
2534 SV *cb;
2535
2536 /* swap first two elements so we can shift a waiter */
2537 AvARRAY (av)[0] = AvARRAY (av)[1];
2538 AvARRAY (av)[1] = count_sv;
2539 cb = av_shift (av);
2540
2541 if (SvOBJECT (cb))
2542 {
2543 api_ready (aTHX_ cb);
2544 --count;
2545 }
2546 else if (SvTYPE (cb) == SVt_PVCV)
2547 {
2548 dSP;
2549 PUSHMARK (SP);
2550 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2551 PUTBACK;
2552 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2553 }
2554
2555 SvREFCNT_dec (cb);
2556 }
2557}
2558
2559static void
2560coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2561{
2562 /* call $sem->adjust (0) to possibly wake up some other waiters */
2563 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2564}
2565
1016static void 2566static int
1017api_cede (void) 2567slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1018{ 2568{
1019 struct transfer_args ta; 2569 AV *av = (AV *)frame->data;
2570 SV *count_sv = AvARRAY (av)[0];
1020 2571
1021 prepare_cede (&ta); 2572 /* if we are about to throw, don't actually acquire the lock, just throw */
1022 TRANSFER (ta); 2573 if (CORO_THROW)
1023} 2574 return 0;
2575 else if (SvIVX (count_sv) > 0)
2576 {
2577 SvSTATE_current->on_destroy = 0;
1024 2578
2579 if (acquire)
2580 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2581 else
2582 coro_semaphore_adjust (aTHX_ av, 0);
2583
2584 return 0;
2585 }
2586 else
2587 {
2588 int i;
2589 /* if we were woken up but can't down, we look through the whole */
2590 /* waiters list and only add us if we aren't in there already */
2591 /* this avoids some degenerate memory usage cases */
2592
2593 for (i = 1; i <= AvFILLp (av); ++i)
2594 if (AvARRAY (av)[i] == SvRV (coro_current))
2595 return 1;
2596
2597 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2598 return 1;
2599 }
2600}
2601
2602static int
2603slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2604{
2605 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2606}
2607
2608static int
2609slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2610{
2611 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2612}
2613
2614static void
2615slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2616{
2617 AV *av = (AV *)SvRV (arg [0]);
2618
2619 if (SvIVX (AvARRAY (av)[0]) > 0)
2620 {
2621 frame->data = (void *)av;
2622 frame->prepare = prepare_nop;
2623 }
2624 else
2625 {
2626 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2627
2628 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2629 frame->prepare = prepare_schedule;
2630
2631 /* to avoid race conditions when a woken-up coro gets terminated */
2632 /* we arrange for a temporary on_destroy that calls adjust (0) */
2633 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2634 }
2635}
2636
2637static void
2638slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2639{
2640 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2641 frame->check = slf_check_semaphore_down;
2642}
2643
2644static void
2645slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 if (items >= 2)
2648 {
2649 /* callback form */
2650 AV *av = (AV *)SvRV (arg [0]);
2651 SV *cb_cv = s_get_cv_croak (arg [1]);
2652
2653 av_push (av, SvREFCNT_inc_NN (cb_cv));
2654
2655 if (SvIVX (AvARRAY (av)[0]) > 0)
2656 coro_semaphore_adjust (aTHX_ av, 0);
2657
2658 frame->prepare = prepare_nop;
2659 frame->check = slf_check_nop;
2660 }
2661 else
2662 {
2663 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2664 frame->check = slf_check_semaphore_wait;
2665 }
2666}
2667
2668/* signal */
2669
2670static void
2671coro_signal_wake (pTHX_ AV *av, int count)
2672{
2673 SvIVX (AvARRAY (av)[0]) = 0;
2674
2675 /* now signal count waiters */
2676 while (count > 0 && AvFILLp (av) > 0)
2677 {
2678 SV *cb;
2679
2680 /* swap first two elements so we can shift a waiter */
2681 cb = AvARRAY (av)[0];
2682 AvARRAY (av)[0] = AvARRAY (av)[1];
2683 AvARRAY (av)[1] = cb;
2684
2685 cb = av_shift (av);
2686
2687 if (SvTYPE (cb) == SVt_PVCV)
2688 {
2689 dSP;
2690 PUSHMARK (SP);
2691 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2692 PUTBACK;
2693 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2694 }
2695 else
2696 {
2697 api_ready (aTHX_ cb);
2698 sv_setiv (cb, 0); /* signal waiter */
2699 }
2700
2701 SvREFCNT_dec (cb);
2702
2703 --count;
2704 }
2705}
2706
2707static int
2708slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2709{
2710 /* if we are about to throw, also stop waiting */
2711 return SvROK ((SV *)frame->data) && !CORO_THROW;
2712}
2713
2714static void
2715slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 AV *av = (AV *)SvRV (arg [0]);
2718
2719 if (items >= 2)
2720 {
2721 SV *cb_cv = s_get_cv_croak (arg [1]);
2722 av_push (av, SvREFCNT_inc_NN (cb_cv));
2723
2724 if (SvIVX (AvARRAY (av)[0]))
2725 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2726
2727 frame->prepare = prepare_nop;
2728 frame->check = slf_check_nop;
2729 }
2730 else if (SvIVX (AvARRAY (av)[0]))
2731 {
2732 SvIVX (AvARRAY (av)[0]) = 0;
2733 frame->prepare = prepare_nop;
2734 frame->check = slf_check_nop;
2735 }
2736 else
2737 {
2738 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2739
2740 av_push (av, waiter);
2741
2742 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2743 frame->prepare = prepare_schedule;
2744 frame->check = slf_check_signal_wait;
2745 }
2746}
2747
2748/*****************************************************************************/
2749/* Coro::AIO */
2750
2751#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2752
2753/* helper storage struct */
2754struct io_state
2755{
2756 int errorno;
2757 I32 laststype; /* U16 in 5.10.0 */
2758 int laststatval;
2759 Stat_t statcache;
2760};
2761
2762static void
2763coro_aio_callback (pTHX_ CV *cv)
2764{
2765 dXSARGS;
2766 AV *state = (AV *)S_GENSUB_ARG;
2767 SV *coro = av_pop (state);
2768 SV *data_sv = newSV (sizeof (struct io_state));
2769
2770 av_extend (state, items - 1);
2771
2772 sv_upgrade (data_sv, SVt_PV);
2773 SvCUR_set (data_sv, sizeof (struct io_state));
2774 SvPOK_only (data_sv);
2775
2776 {
2777 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2778
2779 data->errorno = errno;
2780 data->laststype = PL_laststype;
2781 data->laststatval = PL_laststatval;
2782 data->statcache = PL_statcache;
2783 }
2784
2785 /* now build the result vector out of all the parameters and the data_sv */
2786 {
2787 int i;
2788
2789 for (i = 0; i < items; ++i)
2790 av_push (state, SvREFCNT_inc_NN (ST (i)));
2791 }
2792
2793 av_push (state, data_sv);
2794
2795 api_ready (aTHX_ coro);
2796 SvREFCNT_dec (coro);
2797 SvREFCNT_dec ((AV *)state);
2798}
2799
2800static int
2801slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2802{
2803 AV *state = (AV *)frame->data;
2804
2805 /* if we are about to throw, return early */
2806 /* this does not cancel the aio request, but at least */
2807 /* it quickly returns */
2808 if (CORO_THROW)
2809 return 0;
2810
2811 /* one element that is an RV? repeat! */
2812 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2813 return 1;
2814
2815 /* restore status */
2816 {
2817 SV *data_sv = av_pop (state);
2818 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2819
2820 errno = data->errorno;
2821 PL_laststype = data->laststype;
2822 PL_laststatval = data->laststatval;
2823 PL_statcache = data->statcache;
2824
2825 SvREFCNT_dec (data_sv);
2826 }
2827
2828 /* push result values */
2829 {
2830 dSP;
2831 int i;
2832
2833 EXTEND (SP, AvFILLp (state) + 1);
2834 for (i = 0; i <= AvFILLp (state); ++i)
2835 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2836
2837 PUTBACK;
2838 }
2839
2840 return 0;
2841}
2842
2843static void
2844slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2845{
2846 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2847 SV *coro_hv = SvRV (coro_current);
2848 struct coro *coro = SvSTATE_hv (coro_hv);
2849
2850 /* put our coroutine id on the state arg */
2851 av_push (state, SvREFCNT_inc_NN (coro_hv));
2852
2853 /* first see whether we have a non-zero priority and set it as AIO prio */
2854 if (coro->prio)
2855 {
2856 dSP;
2857
2858 static SV *prio_cv;
2859 static SV *prio_sv;
2860
2861 if (expect_false (!prio_cv))
2862 {
2863 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2864 prio_sv = newSViv (0);
2865 }
2866
2867 PUSHMARK (SP);
2868 sv_setiv (prio_sv, coro->prio);
2869 XPUSHs (prio_sv);
2870
2871 PUTBACK;
2872 call_sv (prio_cv, G_VOID | G_DISCARD);
2873 }
2874
2875 /* now call the original request */
2876 {
2877 dSP;
2878 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2879 int i;
2880
2881 PUSHMARK (SP);
2882
2883 /* first push all args to the stack */
2884 EXTEND (SP, items + 1);
2885
2886 for (i = 0; i < items; ++i)
2887 PUSHs (arg [i]);
2888
2889 /* now push the callback closure */
2890 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2891
2892 /* now call the AIO function - we assume our request is uncancelable */
2893 PUTBACK;
2894 call_sv ((SV *)req, G_VOID | G_DISCARD);
2895 }
2896
2897 /* now that the requets is going, we loop toll we have a result */
2898 frame->data = (void *)state;
2899 frame->prepare = prepare_schedule;
2900 frame->check = slf_check_aio_req;
2901}
2902
2903static void
2904coro_aio_req_xs (pTHX_ CV *cv)
2905{
2906 dXSARGS;
2907
2908 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2909
2910 XSRETURN_EMPTY;
2911}
2912
2913/*****************************************************************************/
2914
2915#if CORO_CLONE
2916# include "clone.c"
2917#endif
2918
2919/*****************************************************************************/
2920
2921static SV *
2922coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2923{
2924 SV *coro_sv;
2925 struct coro *coro;
2926 MAGIC *mg;
2927 HV *hv;
2928 SV *cb;
2929 int i;
2930
2931 if (argc > 0)
2932 {
2933 cb = s_get_cv_croak (argv [0]);
2934
2935 if (!is_coro)
2936 {
2937 if (CvISXSUB (cb))
2938 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2939
2940 if (!CvROOT (cb))
2941 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2942 }
2943 }
2944
2945 Newz (0, coro, 1, struct coro);
2946 coro->args = newAV ();
2947 coro->flags = CF_NEW;
2948
2949 if (coro_first) coro_first->prev = coro;
2950 coro->next = coro_first;
2951 coro_first = coro;
2952
2953 coro->hv = hv = newHV ();
2954 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2955 mg->mg_flags |= MGf_DUP;
2956 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2957
2958 if (argc > 0)
2959 {
2960 av_extend (coro->args, argc + is_coro - 1);
2961
2962 if (is_coro)
2963 {
2964 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2965 cb = (SV *)cv_coro_run;
2966 }
2967
2968 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2969
2970 for (i = 1; i < argc; i++)
2971 av_push (coro->args, newSVsv (argv [i]));
2972 }
2973
2974 return coro_sv;
2975}
2976
1025MODULE = Coro::State PACKAGE = Coro::State 2977MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1026 2978
1027PROTOTYPES: DISABLE 2979PROTOTYPES: DISABLE
1028 2980
1029BOOT: 2981BOOT:
1030{ 2982{
1031#ifdef USE_ITHREADS 2983#ifdef USE_ITHREADS
1032 MUTEX_INIT (&coro_mutex); 2984# if CORO_PTHREAD
2985 coro_thx = PERL_GET_CONTEXT;
2986# endif
1033#endif 2987#endif
1034 BOOT_PAGESIZE; 2988 BOOT_PAGESIZE;
1035 2989
2990 cctx_current = cctx_new_empty ();
2991
2992 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2993 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2994
2995 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2996 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2997 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2998
2999 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3000 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3001 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3002
1036 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3003 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037 3004
1038 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3005 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1039 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3006 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1040 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3007 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3008 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1041 3009
1042 main_mainstack = PL_mainstack; 3010 main_mainstack = PL_mainstack;
3011 main_top_env = PL_top_env;
1043 3012
3013 while (main_top_env->je_prev)
3014 main_top_env = main_top_env->je_prev;
3015
3016 {
3017 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3018
3019 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3020 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3021
3022 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3023 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3024 }
3025
1044 coroapi.ver = CORO_API_VERSION; 3026 coroapi.ver = CORO_API_VERSION;
3027 coroapi.rev = CORO_API_REVISION;
3028
1045 coroapi.transfer = api_transfer; 3029 coroapi.transfer = api_transfer;
1046 3030
3031 coroapi.sv_state = SvSTATE_;
3032 coroapi.execute_slf = api_execute_slf;
3033 coroapi.prepare_nop = prepare_nop;
3034 coroapi.prepare_schedule = prepare_schedule;
3035 coroapi.prepare_cede = prepare_cede;
3036 coroapi.prepare_cede_notself = prepare_cede_notself;
3037
3038 {
3039 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3040
3041 if (!svp) croak ("Time::HiRes is required");
3042 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3043
3044 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3045
3046 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3047 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3048 }
3049
1047 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3050 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1048} 3051}
1049 3052
1050SV * 3053SV *
1051new (char *klass, ...) 3054new (SV *klass, ...)
3055 ALIAS:
3056 Coro::new = 1
1052 CODE: 3057 CODE:
1053{ 3058 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1054 struct coro *coro; 3059 OUTPUT:
1055 HV *hv;
1056 int i;
1057
1058 Newz (0, coro, 1, struct coro);
1059 coro->args = newAV ();
1060 coro->flags = CF_NEW;
1061
1062 hv = newHV ();
1063 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065
1066 for (i = 1; i < items; i++)
1067 av_push (coro->args, newSVsv (ST (i)));
1068}
1069 OUTPUT:
1070 RETVAL 3060 RETVAL
1071 3061
1072void 3062void
1073_set_stacklevel (...) 3063transfer (...)
1074 ALIAS: 3064 PROTOTYPE: $$
1075 Coro::State::transfer = 1 3065 CODE:
1076 Coro::schedule = 2 3066 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1077 Coro::cede = 3
1078 CODE:
1079{
1080 struct transfer_args ta;
1081 3067
1082 switch (ix) 3068bool
1083 { 3069_destroy (SV *coro_sv)
1084 case 0: 3070 CODE:
1085 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3071 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1086 ta.next = 0; 3072 OUTPUT:
1087 ta.flags = TRANSFER_SET_STACKLEVEL; 3073 RETVAL
1088 break;
1089
1090 case 1:
1091 if (items != 3)
1092 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1093
1094 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1095 break;
1096
1097 case 2:
1098 prepare_schedule (&ta);
1099 break;
1100
1101 case 3:
1102 prepare_cede (&ta);
1103 break;
1104 }
1105
1106 TRANSFER (ta);
1107}
1108 3074
1109void 3075void
1110_clone_state_from (SV *dst, SV *src)
1111 CODE:
1112{
1113 struct coro *coro_src = SvSTATE (src);
1114
1115 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117 ++coro_src->refcnt;
1118 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119}
1120
1121void
1122_exit (code) 3076_exit (int code)
1123 int code
1124 PROTOTYPE: $ 3077 PROTOTYPE: $
1125 CODE: 3078 CODE:
1126 _exit (code); 3079 _exit (code);
1127 3080
3081SV *
3082clone (Coro::State coro)
3083 CODE:
3084{
3085#if CORO_CLONE
3086 struct coro *ncoro = coro_clone (aTHX_ coro);
3087 MAGIC *mg;
3088 /* TODO: too much duplication */
3089 ncoro->hv = newHV ();
3090 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3091 mg->mg_flags |= MGf_DUP;
3092 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3093#else
3094 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3095#endif
3096}
3097 OUTPUT:
3098 RETVAL
3099
3100int
3101cctx_stacksize (int new_stacksize = 0)
3102 PROTOTYPE: ;$
3103 CODE:
3104 RETVAL = cctx_stacksize;
3105 if (new_stacksize)
3106 {
3107 cctx_stacksize = new_stacksize;
3108 ++cctx_gen;
3109 }
3110 OUTPUT:
3111 RETVAL
3112
3113int
3114cctx_max_idle (int max_idle = 0)
3115 PROTOTYPE: ;$
3116 CODE:
3117 RETVAL = cctx_max_idle;
3118 if (max_idle > 1)
3119 cctx_max_idle = max_idle;
3120 OUTPUT:
3121 RETVAL
3122
1128int 3123int
1129cctx_count () 3124cctx_count ()
3125 PROTOTYPE:
1130 CODE: 3126 CODE:
1131 RETVAL = cctx_count; 3127 RETVAL = cctx_count;
1132 OUTPUT: 3128 OUTPUT:
1133 RETVAL 3129 RETVAL
1134 3130
1135int 3131int
1136cctx_idle () 3132cctx_idle ()
3133 PROTOTYPE:
1137 CODE: 3134 CODE:
1138 RETVAL = cctx_idle; 3135 RETVAL = cctx_idle;
1139 OUTPUT: 3136 OUTPUT:
1140 RETVAL 3137 RETVAL
1141 3138
3139void
3140list ()
3141 PROTOTYPE:
3142 PPCODE:
3143{
3144 struct coro *coro;
3145 for (coro = coro_first; coro; coro = coro->next)
3146 if (coro->hv)
3147 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3148}
3149
3150void
3151call (Coro::State coro, SV *coderef)
3152 ALIAS:
3153 eval = 1
3154 CODE:
3155{
3156 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3157 {
3158 struct coro *current = SvSTATE_current;
3159
3160 if (current != coro)
3161 {
3162 PUTBACK;
3163 save_perl (aTHX_ current);
3164 load_perl (aTHX_ coro);
3165 SPAGAIN;
3166 }
3167
3168 PUSHSTACK;
3169
3170 PUSHMARK (SP);
3171 PUTBACK;
3172
3173 if (ix)
3174 eval_sv (coderef, 0);
3175 else
3176 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3177
3178 POPSTACK;
3179 SPAGAIN;
3180
3181 if (current != coro)
3182 {
3183 PUTBACK;
3184 save_perl (aTHX_ coro);
3185 load_perl (aTHX_ current);
3186 SPAGAIN;
3187 }
3188 }
3189}
3190
3191SV *
3192is_ready (Coro::State coro)
3193 PROTOTYPE: $
3194 ALIAS:
3195 is_ready = CF_READY
3196 is_running = CF_RUNNING
3197 is_new = CF_NEW
3198 is_destroyed = CF_DESTROYED
3199 is_suspended = CF_SUSPENDED
3200 CODE:
3201 RETVAL = boolSV (coro->flags & ix);
3202 OUTPUT:
3203 RETVAL
3204
3205void
3206throw (Coro::State self, SV *throw = &PL_sv_undef)
3207 PROTOTYPE: $;$
3208 CODE:
3209{
3210 struct coro *current = SvSTATE_current;
3211 SV **throwp = self == current ? &CORO_THROW : &self->except;
3212 SvREFCNT_dec (*throwp);
3213 SvGETMAGIC (throw);
3214 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3215}
3216
3217void
3218api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3219 PROTOTYPE: $;$
3220 C_ARGS: aTHX_ coro, flags
3221
3222SV *
3223has_cctx (Coro::State coro)
3224 PROTOTYPE: $
3225 CODE:
3226 /* maybe manage the running flag differently */
3227 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3228 OUTPUT:
3229 RETVAL
3230
3231int
3232is_traced (Coro::State coro)
3233 PROTOTYPE: $
3234 CODE:
3235 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3236 OUTPUT:
3237 RETVAL
3238
3239UV
3240rss (Coro::State coro)
3241 PROTOTYPE: $
3242 ALIAS:
3243 usecount = 1
3244 CODE:
3245 switch (ix)
3246 {
3247 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3248 case 1: RETVAL = coro->usecount; break;
3249 }
3250 OUTPUT:
3251 RETVAL
3252
3253void
3254force_cctx ()
3255 PROTOTYPE:
3256 CODE:
3257 cctx_current->idle_sp = 0;
3258
3259void
3260swap_defsv (Coro::State self)
3261 PROTOTYPE: $
3262 ALIAS:
3263 swap_defav = 1
3264 CODE:
3265 if (!self->slot)
3266 croak ("cannot swap state with coroutine that has no saved state,");
3267 else
3268 {
3269 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3270 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3271
3272 SV *tmp = *src; *src = *dst; *dst = tmp;
3273 }
3274
3275void
3276cancel (Coro::State self)
3277 CODE:
3278 coro_state_destroy (aTHX_ self);
3279 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3280
3281
3282SV *
3283enable_times (int enabled = enable_times)
3284 CODE:
3285{
3286 RETVAL = boolSV (enable_times);
3287
3288 if (enabled != enable_times)
3289 {
3290 enable_times = enabled;
3291
3292 coro_times_update ();
3293 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3294 }
3295}
3296 OUTPUT:
3297 RETVAL
3298
3299void
3300times (Coro::State self)
3301 PPCODE:
3302{
3303 struct coro *current = SvSTATE (coro_current);
3304
3305 if (expect_false (current == self))
3306 {
3307 coro_times_update ();
3308 coro_times_add (SvSTATE (coro_current));
3309 }
3310
3311 EXTEND (SP, 2);
3312 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3313 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3314
3315 if (expect_false (current == self))
3316 coro_times_sub (SvSTATE (coro_current));
3317}
3318
1142MODULE = Coro::State PACKAGE = Coro 3319MODULE = Coro::State PACKAGE = Coro
1143 3320
1144BOOT: 3321BOOT:
1145{ 3322{
1146 int i; 3323 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3324 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3325 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3326 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3327 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3328 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3329 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3330 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3331 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1147 3332
3333 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3334 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3335 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3336
1148 coro_stash = gv_stashpv ("Coro", TRUE); 3337 coro_stash = gv_stashpv ("Coro", TRUE);
1149 3338
1150 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3339 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1151 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3340 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1152 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3341 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1153 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3342 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1154 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3343 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1155 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3344 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1156
1157 coro_current = get_sv ("Coro::current", FALSE);
1158 SvREADONLY_on (coro_current);
1159
1160 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161 coro_ready[i] = newAV ();
1162 3345
1163 { 3346 {
1164 SV *sv = perl_get_sv("Coro::API", 1); 3347 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1165 3348
1166 coroapi.schedule = api_schedule; 3349 coroapi.schedule = api_schedule;
3350 coroapi.schedule_to = api_schedule_to;
1167 coroapi.cede = api_cede; 3351 coroapi.cede = api_cede;
3352 coroapi.cede_notself = api_cede_notself;
1168 coroapi.ready = api_ready; 3353 coroapi.ready = api_ready;
1169 coroapi.is_ready = api_is_ready; 3354 coroapi.is_ready = api_is_ready;
1170 coroapi.nready = &coro_nready; 3355 coroapi.nready = coro_nready;
1171 coroapi.current = coro_current; 3356 coroapi.current = coro_current;
1172 3357
1173 GCoroAPI = &coroapi; 3358 /*GCoroAPI = &coroapi;*/
1174 sv_setiv (sv, (IV)&coroapi); 3359 sv_setiv (sv, (IV)&coroapi);
1175 SvREADONLY_on (sv); 3360 SvREADONLY_on (sv);
1176 } 3361 }
1177} 3362}
1178 3363
3364SV *
3365async (...)
3366 PROTOTYPE: &@
3367 CODE:
3368 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3369 api_ready (RETVAL);
3370 OUTPUT:
3371 RETVAL
3372
3373void
3374terminate (...)
3375 CODE:
3376 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3377
3378void
3379schedule (...)
3380 CODE:
3381 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3382
3383void
3384schedule_to (...)
3385 CODE:
3386 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3387
3388void
3389cede_to (...)
3390 CODE:
3391 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3392
3393void
3394cede (...)
3395 CODE:
3396 CORO_EXECUTE_SLF_XS (slf_init_cede);
3397
3398void
3399cede_notself (...)
3400 CODE:
3401 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3402
3403void
3404_set_current (SV *current)
3405 PROTOTYPE: $
3406 CODE:
3407 SvREFCNT_dec (SvRV (coro_current));
3408 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3409
3410void
3411_set_readyhook (SV *hook)
3412 PROTOTYPE: $
3413 CODE:
3414 SvREFCNT_dec (coro_readyhook);
3415 SvGETMAGIC (hook);
3416 if (SvOK (hook))
3417 {
3418 coro_readyhook = newSVsv (hook);
3419 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3420 }
3421 else
3422 {
3423 coro_readyhook = 0;
3424 CORO_READYHOOK = 0;
3425 }
3426
1179int 3427int
1180prio (Coro::State coro, int newprio = 0) 3428prio (Coro::State coro, int newprio = 0)
3429 PROTOTYPE: $;$
1181 ALIAS: 3430 ALIAS:
1182 nice = 1 3431 nice = 1
1183 CODE: 3432 CODE:
1184{ 3433{
1185 RETVAL = coro->prio; 3434 RETVAL = coro->prio;
1186 3435
1187 if (items > 1) 3436 if (items > 1)
1188 { 3437 {
1189 if (ix) 3438 if (ix)
1190 newprio += coro->prio; 3439 newprio = coro->prio - newprio;
1191 3440
1192 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3441 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1193 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3442 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1194 3443
1195 coro->prio = newprio; 3444 coro->prio = newprio;
1196 } 3445 }
1197} 3446}
3447 OUTPUT:
3448 RETVAL
1198 3449
1199SV * 3450SV *
1200ready (SV *self) 3451ready (SV *self)
1201 PROTOTYPE: $ 3452 PROTOTYPE: $
1202 CODE: 3453 CODE:
1203 RETVAL = boolSV (api_ready (self)); 3454 RETVAL = boolSV (api_ready (aTHX_ self));
1204 OUTPUT:
1205 RETVAL
1206
1207SV *
1208is_ready (SV *self)
1209 PROTOTYPE: $
1210 CODE:
1211 RETVAL = boolSV (api_is_ready (self));
1212 OUTPUT: 3455 OUTPUT:
1213 RETVAL 3456 RETVAL
1214 3457
1215int 3458int
1216nready (...) 3459nready (...)
… …
1219 RETVAL = coro_nready; 3462 RETVAL = coro_nready;
1220 OUTPUT: 3463 OUTPUT:
1221 RETVAL 3464 RETVAL
1222 3465
1223void 3466void
1224_set_current (SV *current) 3467suspend (Coro::State self)
1225 PROTOTYPE: $ 3468 PROTOTYPE: $
1226 CODE: 3469 CODE:
1227 SvREFCNT_dec (SvRV (coro_current)); 3470 self->flags |= CF_SUSPENDED;
1228 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1229 3471
1230MODULE = Coro::State PACKAGE = Coro::AIO 3472void
3473resume (Coro::State self)
3474 PROTOTYPE: $
3475 CODE:
3476 self->flags &= ~CF_SUSPENDED;
3477
3478void
3479_pool_handler (...)
3480 CODE:
3481 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3482
3483void
3484async_pool (SV *cv, ...)
3485 PROTOTYPE: &@
3486 PPCODE:
3487{
3488 HV *hv = (HV *)av_pop (av_async_pool);
3489 AV *av = newAV ();
3490 SV *cb = ST (0);
3491 int i;
3492
3493 av_extend (av, items - 2);
3494 for (i = 1; i < items; ++i)
3495 av_push (av, SvREFCNT_inc_NN (ST (i)));
3496
3497 if ((SV *)hv == &PL_sv_undef)
3498 {
3499 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3500 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3501 SvREFCNT_dec (sv);
3502 }
3503
3504 {
3505 struct coro *coro = SvSTATE_hv (hv);
3506
3507 assert (!coro->invoke_cb);
3508 assert (!coro->invoke_av);
3509 coro->invoke_cb = SvREFCNT_inc (cb);
3510 coro->invoke_av = av;
3511 }
3512
3513 api_ready (aTHX_ (SV *)hv);
3514
3515 if (GIMME_V != G_VOID)
3516 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3517 else
3518 SvREFCNT_dec (hv);
3519}
1231 3520
1232SV * 3521SV *
1233_get_state () 3522rouse_cb ()
3523 PROTOTYPE:
1234 CODE: 3524 CODE:
1235{ 3525 RETVAL = coro_new_rouse_cb (aTHX);
1236 struct {
1237 int errorno;
1238 int laststype;
1239 int laststatval;
1240 Stat_t statcache;
1241 } data;
1242
1243 data.errorno = errno;
1244 data.laststype = PL_laststype;
1245 data.laststatval = PL_laststatval;
1246 data.statcache = PL_statcache;
1247
1248 RETVAL = newSVpvn ((char *)&data, sizeof data);
1249}
1250 OUTPUT: 3526 OUTPUT:
1251 RETVAL 3527 RETVAL
1252 3528
1253void 3529void
1254_set_state (char *data_) 3530rouse_wait (...)
3531 PROTOTYPE: ;$
3532 PPCODE:
3533 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3534
3535void
3536on_enter (SV *block)
3537 ALIAS:
3538 on_leave = 1
1255 PROTOTYPE: $ 3539 PROTOTYPE: &
1256 CODE: 3540 CODE:
1257{ 3541{
1258 struct { 3542 struct coro *coro = SvSTATE_current;
3543 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3544
3545 block = s_get_cv_croak (block);
3546
3547 if (!*avp)
3548 *avp = newAV ();
3549
3550 av_push (*avp, SvREFCNT_inc (block));
3551
3552 if (!ix)
3553 on_enterleave_call (aTHX_ block);
3554
3555 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3556 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3557 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3558}
3559
3560
3561MODULE = Coro::State PACKAGE = PerlIO::cede
3562
3563BOOT:
3564 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3565
3566
3567MODULE = Coro::State PACKAGE = Coro::Semaphore
3568
3569SV *
3570new (SV *klass, SV *count = 0)
3571 CODE:
3572{
3573 int semcnt = 1;
3574
3575 if (count)
3576 {
3577 SvGETMAGIC (count);
3578
3579 if (SvOK (count))
3580 semcnt = SvIV (count);
3581 }
3582
3583 RETVAL = sv_bless (
3584 coro_waitarray_new (aTHX_ semcnt),
3585 GvSTASH (CvGV (cv))
3586 );
3587}
3588 OUTPUT:
3589 RETVAL
3590
3591# helper for Coro::Channel and others
3592SV *
3593_alloc (int count)
3594 CODE:
3595 RETVAL = coro_waitarray_new (aTHX_ count);
3596 OUTPUT:
3597 RETVAL
3598
3599SV *
3600count (SV *self)
3601 CODE:
3602 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3603 OUTPUT:
3604 RETVAL
3605
3606void
3607up (SV *self, int adjust = 1)
3608 ALIAS:
3609 adjust = 1
3610 CODE:
3611 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3612
3613void
3614down (...)
3615 CODE:
3616 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3617
3618void
3619wait (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3622
3623void
3624try (SV *self)
3625 PPCODE:
3626{
3627 AV *av = (AV *)SvRV (self);
3628 SV *count_sv = AvARRAY (av)[0];
3629 IV count = SvIVX (count_sv);
3630
3631 if (count > 0)
3632 {
3633 --count;
3634 SvIVX (count_sv) = count;
3635 XSRETURN_YES;
3636 }
3637 else
3638 XSRETURN_NO;
3639}
3640
3641void
3642waiters (SV *self)
3643 PPCODE:
3644{
3645 AV *av = (AV *)SvRV (self);
3646 int wcount = AvFILLp (av) + 1 - 1;
3647
3648 if (GIMME_V == G_SCALAR)
3649 XPUSHs (sv_2mortal (newSViv (wcount)));
3650 else
3651 {
1259 int errorno; 3652 int i;
1260 int laststype; 3653 EXTEND (SP, wcount);
1261 int laststatval; 3654 for (i = 1; i <= wcount; ++i)
1262 Stat_t statcache; 3655 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1263 } *data = (void *)data_; 3656 }
1264
1265 errno = data->errorno;
1266 PL_laststype = data->laststype;
1267 PL_laststatval = data->laststatval;
1268 PL_statcache = data->statcache;
1269} 3657}
3658
3659MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3660
3661void
3662_may_delete (SV *sem, int count, int extra_refs)
3663 PPCODE:
3664{
3665 AV *av = (AV *)SvRV (sem);
3666
3667 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3668 && AvFILLp (av) == 0 /* no waiters, just count */
3669 && SvIV (AvARRAY (av)[0]) == count)
3670 XSRETURN_YES;
3671
3672 XSRETURN_NO;
3673}
3674
3675MODULE = Coro::State PACKAGE = Coro::Signal
3676
3677SV *
3678new (SV *klass)
3679 CODE:
3680 RETVAL = sv_bless (
3681 coro_waitarray_new (aTHX_ 0),
3682 GvSTASH (CvGV (cv))
3683 );
3684 OUTPUT:
3685 RETVAL
3686
3687void
3688wait (...)
3689 CODE:
3690 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3691
3692void
3693broadcast (SV *self)
3694 CODE:
3695{
3696 AV *av = (AV *)SvRV (self);
3697 coro_signal_wake (aTHX_ av, AvFILLp (av));
3698}
3699
3700void
3701send (SV *self)
3702 CODE:
3703{
3704 AV *av = (AV *)SvRV (self);
3705
3706 if (AvFILLp (av))
3707 coro_signal_wake (aTHX_ av, 1);
3708 else
3709 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3710}
3711
3712IV
3713awaited (SV *self)
3714 CODE:
3715 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3716 OUTPUT:
3717 RETVAL
3718
3719
3720MODULE = Coro::State PACKAGE = Coro::AnyEvent
3721
3722BOOT:
3723 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3724
3725void
3726_schedule (...)
3727 CODE:
3728{
3729 static int incede;
3730
3731 api_cede_notself (aTHX);
3732
3733 ++incede;
3734 while (coro_nready >= incede && api_cede (aTHX))
3735 ;
3736
3737 sv_setsv (sv_activity, &PL_sv_undef);
3738 if (coro_nready >= incede)
3739 {
3740 PUSHMARK (SP);
3741 PUTBACK;
3742 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3743 }
3744
3745 --incede;
3746}
3747
3748
3749MODULE = Coro::State PACKAGE = Coro::AIO
3750
3751void
3752_register (char *target, char *proto, SV *req)
3753 CODE:
3754{
3755 SV *req_cv = s_get_cv_croak (req);
3756 /* newXSproto doesn't return the CV on 5.8 */
3757 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3758 sv_setpv ((SV *)slf_cv, proto);
3759 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3760}
3761
3762MODULE = Coro::State PACKAGE = Coro::Select
3763
3764void
3765patch_pp_sselect ()
3766 CODE:
3767 if (!coro_old_pp_sselect)
3768 {
3769 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3770 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3771 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3772 }
3773
3774void
3775unpatch_pp_sselect ()
3776 CODE:
3777 if (coro_old_pp_sselect)
3778 {
3779 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3780 coro_old_pp_sselect = 0;
3781 }
3782
3783

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