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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.365 by root, Mon Jul 20 16:18:30 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "schmorp.h"
10
11#if PERL_VERSION < 6
12# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr
14# endif
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 12
32#include <stdio.h> 13#include <stdio.h>
33#include <errno.h> 14#include <errno.h>
15#include <assert.h>
34 16
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
36# undef STACKGUARD 18# undef setjmp
37#endif 19# undef longjmp
38 20# undef _exit
39#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
40# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
41#endif 24#endif
42 25
43#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
44# include <unistd.h> 27# include <unistd.h>
45# include <sys/mman.h> 28# include <sys/mman.h>
… …
54# ifndef PAGESIZE 37# ifndef PAGESIZE
55# define PAGESIZE pagesize 38# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize; 40static long pagesize;
58# else 41# else
59# define BOOT_PAGESIZE 42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
77#endif
78
79#define IN_DESTRUCT PL_dirty
80
81#if __GNUC__ >= 3
82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
85#else
86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
89#endif
90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
94#define NOINLINE attribute ((noinline))
95
96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
98
99#ifdef USE_ITHREADS
100# if CORO_PTHREAD
101static void *coro_thx;
60# endif 102# endif
61#endif 103#endif
62 104
63/* The next macro should declare a variable stacklevel that contains and approximation 105#ifdef __linux
64 * to the current C stack pointer. Its property is that it changes with each call 106# include <time.h> /* for timespec */
65 * and should be unique. */ 107# include <syscall.h> /* for SYS_* */
66#define dSTACKLEVEL int stacklevel 108# ifdef SYS_clock_gettime
67#define STACKLEVEL ((void *)&stacklevel) 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
68 110# define CORO_CLOCK_MONOTONIC 1
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
70 112# endif
71#include "CoroAPI.h"
72
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif 113#endif
83 114
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;
84static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
85static 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;
86static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
129
130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147static CV *cv_coro_state_new;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
157
158static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle;
160
161enum {
162 CC_MAPPED = 0x01,
163 CC_NOREUSE = 0x02, /* throw this away after tracing */
164 CC_TRACE = 0x04,
165 CC_TRACE_SUB = 0x08, /* trace sub calls */
166 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168};
88 169
89/* this is a structure representing a c-level coroutine */ 170/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 171typedef struct coro_cctx
172{
91 struct coro_stack *next; 173 struct coro_cctx *next;
92 174
93 /* the stack */ 175 /* the stack */
94 void *sptr; 176 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 177 size_t ssize;
96 178
97 /* cpu state */ 179 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 182 JMPENV *top_env;
100 coro_context cctx; 183 coro_context cctx;
101} coro_stack;
102 184
103/* the (fake) coro_stack representing the main program */ 185 U32 gen;
104static coro_stack *main_stack; 186#if CORO_USE_VALGRIND
187 int valgrind_id;
188#endif
189 unsigned char flags;
190} coro_cctx;
191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
196enum {
197 CF_RUNNING = 0x0001, /* coroutine is running */
198 CF_READY = 0x0002, /* coroutine is ready */
199 CF_NEW = 0x0004, /* has never been switched to */
200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
201 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
202};
203
204/* the structure where most of the perl state is stored, overlaid on the cxstack */
205typedef struct
206{
207 SV *defsv;
208 AV *defav;
209 SV *errsv;
210 SV *irsgv;
211 HV *hinthv;
212#define VAR(name,type) type name;
213# include "state.h"
214#undef VAR
215} perl_slots;
216
217#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
105 218
106/* this is a structure representing a perl-level coroutine */ 219/* this is a structure representing a perl-level coroutine */
107struct coro { 220struct coro {
108 /* the c coroutine allocated to this perl coroutine, if any */ 221 /* the C coroutine allocated to this perl coroutine, if any */
109 coro_stack *stack; 222 coro_cctx *cctx;
110 223
111 /* data associated with this coroutine (initial args) */ 224 /* ready queue */
112 AV *args; 225 struct coro *next_ready;
113 int refcnt;
114 226
115 /* optionally saved, might be zero */ 227 /* state data */
116 AV *defav; 228 struct CoroSLF slf_frame; /* saved slf frame */
117 SV *defsv;
118 SV *errsv;
119
120 /* saved global state not related to stacks */
121 U8 dowarn;
122 I32 in_eval;
123
124 /* the stacks and related info (callchain etc..) */
125 PERL_SI *curstackinfo;
126 AV *curstack;
127 AV *mainstack; 229 AV *mainstack;
128 SV **stack_sp; 230 perl_slots *slot; /* basically the saved sp */
129 OP *op; 231
130 SV **curpad; 232 CV *startcv; /* the CV to execute */
131 AV *comppad; 233 AV *args; /* data associated with this coroutine (initial args) */
132 CV *compcv; 234 int refcnt; /* coroutines are refcounted, yes */
133 SV **stack_base; 235 int flags; /* CF_ flags */
134 SV **stack_max; 236 HV *hv; /* the perl hash associated with this coro, if any */
135 SV **tmps_stack; 237 void (*on_destroy)(pTHX_ struct coro *coro);
136 I32 tmps_floor; 238
137 I32 tmps_ix; 239 /* statistics */
138 I32 tmps_max; 240 int usecount; /* number of transfers to this coro */
139 I32 *markstack;
140 I32 *markstack_ptr;
141 I32 *markstack_max;
142 I32 *scopestack;
143 I32 scopestack_ix;
144 I32 scopestack_max;
145 ANY *savestack;
146 I32 savestack_ix;
147 I32 savestack_max;
148 OP **retstack;
149 I32 retstack_ix;
150 I32 retstack_max;
151 PMOP *curpm;
152 COP *curcop;
153 241
154 /* coro process data */ 242 /* coro process data */
155 int prio; 243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb;
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* times */
257 coro_ts t_cpu, t_real;
258
259 /* linked list */
260 struct coro *next, *prev;
156}; 261};
157 262
158typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
160 265
266/* the following variables are effectively part of the perl context */
267/* and get copied between struct coro and these variables */
268/* the mainr easonw e don't support windows process emulation */
269static struct CoroSLF slf_frame; /* the current slf frame */
270
271/** Coro ********************************************************************/
272
273#define CORO_PRIO_MAX 3
274#define CORO_PRIO_HIGH 1
275#define CORO_PRIO_NORMAL 0
276#define CORO_PRIO_LOW -1
277#define CORO_PRIO_IDLE -3
278#define CORO_PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
284static CV *cv_coro_run, *cv_coro_terminate;
285static struct coro *coro_first;
286#define coro_nready coroapi.nready
287
288/** Coro::Select ************************************************************/
289
290static OP *(*coro_old_pp_sselect) (pTHX);
291static SV *coro_select_select;
292
293/* horrible hack, but if it works... */
294static OP *
295coro_pp_sselect (aTHX)
296{
297 dSP;
298 PUSHMARK (SP - 4); /* fake argument list */
299 XPUSHs (coro_select_select);
300 PUTBACK;
301
302 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
303 PL_op->op_flags |= OPf_STACKED;
304 PL_op->op_private = 0;
305 return PL_ppaddr [OP_ENTERSUB](aTHX);
306}
307
308/** lowlevel stuff **********************************************************/
309
310static SV *
311coro_get_sv (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_sv (name, create);
316#endif
317 return get_sv (name, create);
318}
319
161static AV * 320static AV *
321coro_get_av (pTHX_ const char *name, int create)
322{
323#if PERL_VERSION_ATLEAST (5,10,0)
324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
325 get_av (name, create);
326#endif
327 return get_av (name, create);
328}
329
330static HV *
331coro_get_hv (pTHX_ const char *name, int create)
332{
333#if PERL_VERSION_ATLEAST (5,10,0)
334 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
335 get_hv (name, create);
336#endif
337 return get_hv (name, create);
338}
339
340INLINE void
341coro_times_update ()
342{
343#ifdef coro_clock_gettime
344 struct timespec ts;
345
346 ts.tv_sec = ts.tv_nsec = 0;
347 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
348 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
349
350 ts.tv_sec = ts.tv_nsec = 0;
351 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
352 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
353#else
354 dTHX;
355 UV tv[2];
356
357 u2time (aTHX_ tv);
358 time_real [0] = tv [0];
359 time_real [1] = tv [1] * 1000;
360#endif
361}
362
363INLINE void
364coro_times_add (struct coro *c)
365{
366 c->t_real [1] += time_real [1];
367 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
368 c->t_real [0] += time_real [0];
369
370 c->t_cpu [1] += time_cpu [1];
371 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
372 c->t_cpu [0] += time_cpu [0];
373}
374
375INLINE void
376coro_times_sub (struct coro *c)
377{
378 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
379 c->t_real [1] -= time_real [1];
380 c->t_real [0] -= time_real [0];
381
382 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
383 c->t_cpu [1] -= time_cpu [1];
384 c->t_cpu [0] -= time_cpu [0];
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
439static AV *
162coro_clone_padlist (pTHX_ CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
163{ 441{
164 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
166 444
167 newpadlist = newAV (); 445 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 447#if PERL_VERSION_ATLEAST (5,10,0)
448 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
449#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 451#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 453 --AvFILLp (padlist);
176 454
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
178 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
179 457
180 return newpadlist; 458 return newpadlist;
181} 459}
182 460
183static void 461static void
184free_padlist (pTHX_ AV *padlist) 462free_padlist (pTHX_ AV *padlist)
185{ 463{
186 /* may be during global destruction */ 464 /* may be during global destruction */
187 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
188 { 466 {
189 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
190 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
191 { 470 {
192 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
193 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
194 { 473 I32 j = AvFILLp (av);
195 SV *sv; 474
196 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
197 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
198
199 SvREFCNT_dec (*svp);
200 }
201 } 480 }
202 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
203 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
204 } 486 }
205} 487}
206 488
207static int 489static int
208coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
209{ 491{
210 AV *padlist; 492 AV *padlist;
211 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return 0;
212 498
213 /* casting is fun. */ 499 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 501 free_padlist (aTHX_ padlist);
216 502
217 SvREFCNT_dec (av); 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
218 504
219 return 0; 505 return 0;
220} 506}
221 507
222#define PERL_MAGIC_coro PERL_MAGIC_ext 508static MGVTBL coro_cv_vtbl = {
223 509 0, 0, 0, 0,
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 510 coro_cv_free
511};
225 512
226/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
227static void 514static void
228get_padlist (pTHX_ CV *cv) 515get_padlist (pTHX_ CV *cv)
229{ 516{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 517 MAGIC *mg = CORO_MAGIC_cv (cv);
518 AV *av;
231 519
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 522 else
235 { 523 {
236#if 0 524#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
242#else 531#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
244#endif 533#endif
245 } 534 }
246} 535}
247 536
248static void 537static void
249put_padlist (pTHX_ CV *cv) 538put_padlist (pTHX_ CV *cv)
250{ 539{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 540 MAGIC *mg = CORO_MAGIC_cv (cv);
541 AV *av;
252 542
253 if (!mg) 543 if (expect_false (!mg))
254 { 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260 545
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 546 av = (AV *)mg->mg_obj;
262}
263 547
264#define SB do { 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
265#define SE } while (0) 549 av_extend (av, AvFILLp (av) + 1);
266 550
267#define LOAD(state) load_state(aTHX_ (state)); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 552}
269 553
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 554/** load & save, init *******************************************************/
271 555
272static void 556static void
557on_enterleave_call (pTHX_ SV *cb);
558
559static void
273load_state(pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
274{ 561{
275 PL_dowarn = c->dowarn; 562 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 563 c->slot = 0;
277 564
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 566
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 567 GvSV (PL_defgv) = slot->defsv;
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 568 GvAV (PL_defgv) = slot->defav;
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 569 GvSV (PL_errgv) = slot->errsv;
570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
572
573 #define VAR(name,type) PL_ ## name = slot->name;
574 # include "state.h"
575 #undef VAR
312 576
313 { 577 {
314 dSP; 578 dSP;
579
315 CV *cv; 580 CV *cv;
316 581
317 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
319 { 584 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 586 CvDEPTH (cv) = PTR2IV (POPs);
326 } 587 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 588 }
330 589
331 PUTBACK; 590 PUTBACK;
332 } 591 }
333}
334 592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (enable_times))
597 {
598 if (expect_false (!times_valid))
599 coro_times_update ();
600
601 coro_times_sub (c);
602 }
603
604 if (expect_false (c->on_enter))
605 {
606 int i;
607
608 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
610 }
611}
612
335static void 613static void
336save_state(pTHX_ Coro__State c, int flags) 614save_perl (pTHX_ Coro__State c)
337{ 615{
616 if (expect_false (c->on_leave))
617 {
618 int i;
619
620 for (i = AvFILLp (c->on_leave); i >= 0; --i)
621 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
622 }
623
624 times_valid = 0;
625
626 if (expect_false (enable_times))
627 {
628 coro_times_update (); times_valid = 1;
629 coro_times_add (c);
630 }
631
632 c->except = CORO_THROW;
633 c->slf_frame = slf_frame;
634
338 { 635 {
339 dSP; 636 dSP;
340 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
342 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
344 /* 641 /*
345 * the worst thing you can imagine happens first - we have to save 642 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 643 * (and reinitialize) all cv's in the whole callchain :(
347 */ 644 */
348 645
349 PUSHs (Nullsv); 646 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 647 /* this loop was inspired by pp_caller */
351 for (;;) 648 for (;;)
352 { 649 {
353 while (cxix >= 0) 650 while (expect_true (cxix >= 0))
354 { 651 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
356 653
357 if (CxTYPE(cx) == CXt_SUB) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
358 { 655 {
359 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
657
360 if (CvDEPTH(cv)) 658 if (expect_true (CvDEPTH (cv)))
361 { 659 {
362 EXTEND (SP, CvDEPTH(cv)*2); 660 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 661 PUSHs ((SV *)CvPADLIST (cv));
662 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 663 PUSHs ((SV *)cv);
373 664
665 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 666 get_padlist (aTHX_ cv);
375 } 667 }
376 } 668 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 669 }
386 670
387 if (top_si->si_type == PERLSI_MAIN) 671 if (expect_true (top_si->si_type == PERLSI_MAIN))
388 break; 672 break;
389 673
390 top_si = top_si->si_prev; 674 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack; 675 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix; 676 cxix = top_si->si_cxix;
393 } 677 }
394 678
395 PUTBACK; 679 PUTBACK;
396 } 680 }
397 681
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 682 /* allocate some space on the context stack for our purposes */
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 683 /* we manually unroll here, as usually 2 slots is enough */
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 684 if (SLOT_COUNT >= 1) CXINC;
685 if (SLOT_COUNT >= 2) CXINC;
686 if (SLOT_COUNT >= 3) CXINC;
687 {
688 unsigned int i;
689 for (i = 3; i < SLOT_COUNT; ++i)
690 CXINC;
691 }
692 cxstack_ix -= SLOT_COUNT; /* undo allocation */
401 693
402 c->dowarn = PL_dowarn;
403 c->in_eval = PL_in_eval;
404
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack; 694 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp; 695
409 c->op = PL_op; 696 {
410 c->curpad = PL_curpad; 697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411 c->comppad = PL_comppad; 698
412 c->compcv = PL_compcv; 699 slot->defav = GvAV (PL_defgv);
413 c->stack_base = PL_stack_base; 700 slot->defsv = DEFSV;
414 c->stack_max = PL_stack_max; 701 slot->errsv = ERRSV;
415 c->tmps_stack = PL_tmps_stack; 702 slot->irsgv = GvSV (irsgv);
416 c->tmps_floor = PL_tmps_floor; 703 slot->hinthv = GvHV (PL_hintgv);
417 c->tmps_ix = PL_tmps_ix; 704
418 c->tmps_max = PL_tmps_max; 705 #define VAR(name,type) slot->name = PL_ ## name;
419 c->markstack = PL_markstack; 706 # include "state.h"
420 c->markstack_ptr = PL_markstack_ptr; 707 #undef VAR
421 c->markstack_max = PL_markstack_max; 708 }
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435} 709}
436 710
437/* 711/*
438 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
439 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
440 * on the (sometimes correct) assumption that coroutines do 714 * on the (sometimes correct) assumption that coroutines do
441 * not usually need a lot of stackspace. 715 * not usually need a lot of stackspace.
442 */ 716 */
717#if CORO_PREFER_PERL_FUNCTIONS
718# define coro_init_stacks(thx) init_stacks ()
719#else
443static void 720static void
444coro_init_stacks (pTHX) 721coro_init_stacks (pTHX)
445{ 722{
446 LOCK; 723 PL_curstackinfo = new_stackinfo(32, 8);
447
448 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449 PL_curstackinfo->si_type = PERLSI_MAIN; 724 PL_curstackinfo->si_type = PERLSI_MAIN;
450 PL_curstack = PL_curstackinfo->si_stack; 725 PL_curstack = PL_curstackinfo->si_stack;
451 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 726 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452 727
453 PL_stack_base = AvARRAY(PL_curstack); 728 PL_stack_base = AvARRAY(PL_curstack);
454 PL_stack_sp = PL_stack_base; 729 PL_stack_sp = PL_stack_base;
455 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 730 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456 731
457 New(50,PL_tmps_stack,96,SV*); 732 New(50,PL_tmps_stack,32,SV*);
458 PL_tmps_floor = -1; 733 PL_tmps_floor = -1;
459 PL_tmps_ix = -1; 734 PL_tmps_ix = -1;
460 PL_tmps_max = 96; 735 PL_tmps_max = 32;
461 736
462 New(54,PL_markstack,16,I32); 737 New(54,PL_markstack,16,I32);
463 PL_markstack_ptr = PL_markstack; 738 PL_markstack_ptr = PL_markstack;
464 PL_markstack_max = PL_markstack + 16; 739 PL_markstack_max = PL_markstack + 16;
465 740
466#ifdef SET_MARK_OFFSET 741#ifdef SET_MARK_OFFSET
467 SET_MARK_OFFSET; 742 SET_MARK_OFFSET;
468#endif 743#endif
469 744
470 New(54,PL_scopestack,16,I32); 745 New(54,PL_scopestack,8,I32);
471 PL_scopestack_ix = 0; 746 PL_scopestack_ix = 0;
472 PL_scopestack_max = 16; 747 PL_scopestack_max = 8;
473 748
474 New(54,PL_savestack,96,ANY); 749 New(54,PL_savestack,24,ANY);
475 PL_savestack_ix = 0; 750 PL_savestack_ix = 0;
476 PL_savestack_max = 96; 751 PL_savestack_max = 24;
477 752
478#if PERL_VERSION < 9 753#if !PERL_VERSION_ATLEAST (5,10,0)
479 New(54,PL_retstack,8,OP*); 754 New(54,PL_retstack,4,OP*);
480 PL_retstack_ix = 0; 755 PL_retstack_ix = 0;
481 PL_retstack_max = 8; 756 PL_retstack_max = 4;
482#endif 757#endif
483
484 UNLOCK;
485} 758}
759#endif
486 760
487/* 761/*
488 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
489 */ 763 */
490static void 764static void
491destroy_stacks(pTHX) 765coro_destruct_stacks (pTHX)
492{ 766{
493 if (!IN_DESTRUCT)
494 {
495 /* is this ugly, I ask? */
496 LEAVE_SCOPE (0);
497
498 /* sure it is, but more important: is it correct?? :/ */
499 FREETMPS;
500
501 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
502 }
503
504 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
505 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
506 769
507 while (PL_curstackinfo) 770 while (PL_curstackinfo)
508 { 771 {
509 PERL_SI *p = PL_curstackinfo->si_prev; 772 PERL_SI *p = PL_curstackinfo->si_prev;
510 773
511 { /*D*//*remove*/
512 dSP;
513 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514 PUTBACK; /* possibly superfluous */
515 }
516
517 if (!IN_DESTRUCT) 774 if (!IN_DESTRUCT)
518 {
519 dounwind (-1);/*D*//*remove*/
520 SvREFCNT_dec (PL_curstackinfo->si_stack); 775 SvREFCNT_dec (PL_curstackinfo->si_stack);
521 }
522 776
523 Safefree (PL_curstackinfo->si_cxstack); 777 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree (PL_curstackinfo); 778 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 779 PL_curstackinfo = p;
526 } 780 }
527 781
528 Safefree (PL_tmps_stack); 782 Safefree (PL_tmps_stack);
529 Safefree (PL_markstack); 783 Safefree (PL_markstack);
530 Safefree (PL_scopestack); 784 Safefree (PL_scopestack);
531 Safefree (PL_savestack); 785 Safefree (PL_savestack);
532#if PERL_VERSION < 9 786#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree (PL_retstack); 787 Safefree (PL_retstack);
534#endif 788#endif
535} 789}
536 790
791#define CORO_RSS \
792 rss += sizeof (SYM (curstackinfo)); \
793 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
794 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
795 rss += SYM (tmps_max) * sizeof (SV *); \
796 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
797 rss += SYM (scopestack_max) * sizeof (I32); \
798 rss += SYM (savestack_max) * sizeof (ANY);
799
800static size_t
801coro_rss (pTHX_ struct coro *coro)
802{
803 size_t rss = sizeof (*coro);
804
805 if (coro->mainstack)
806 {
807 if (coro->flags & CF_RUNNING)
808 {
809 #define SYM(sym) PL_ ## sym
810 CORO_RSS;
811 #undef SYM
812 }
813 else
814 {
815 #define SYM(sym) coro->slot->sym
816 CORO_RSS;
817 #undef SYM
818 }
819 }
820
821 return rss;
822}
823
824/** coroutine stack handling ************************************************/
825
826static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
828static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
829
830/* apparently < 5.8.8 */
831#ifndef MgPV_nolen_const
832#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
833 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
834 (const char*)(mg)->mg_ptr)
835#endif
836
837/*
838 * This overrides the default magic get method of %SIG elements.
839 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
840 * and instead of trying to save and restore the hash elements, we just provide
841 * readback here.
842 */
537static void 843static int
538setup_coro (struct coro *coro) 844coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
845{
846 const char *s = MgPV_nolen_const (mg);
847
848 if (*s == '_')
849 {
850 SV **svp = 0;
851
852 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
853 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
854
855 if (svp)
856 {
857 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
858 return 0;
859 }
860 }
861
862 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
863}
864
865static int
866coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
867{
868 const char *s = MgPV_nolen_const (mg);
869
870 if (*s == '_')
871 {
872 SV **svp = 0;
873
874 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
875 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
876
877 if (svp)
878 {
879 SV *old = *svp;
880 *svp = 0;
881 SvREFCNT_dec (old);
882 return 0;
883 }
884 }
885
886 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
887}
888
889static int
890coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
891{
892 const char *s = MgPV_nolen_const (mg);
893
894 if (*s == '_')
895 {
896 SV **svp = 0;
897
898 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
899 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
900
901 if (svp)
902 {
903 SV *old = *svp;
904 *svp = SvOK (sv) ? newSVsv (sv) : 0;
905 SvREFCNT_dec (old);
906 return 0;
907 }
908 }
909
910 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
911}
912
913static void
914prepare_nop (pTHX_ struct coro_transfer_args *ta)
915{
916 /* kind of mega-hacky, but works */
917 ta->next = ta->prev = (struct coro *)ta;
918}
919
920static int
921slf_check_nop (pTHX_ struct CoroSLF *frame)
922{
923 return 0;
924}
925
926static int
927slf_check_repeat (pTHX_ struct CoroSLF *frame)
928{
929 return 1;
930}
931
932static UNOP coro_setup_op;
933
934static void NOINLINE /* noinline to keep it out of the transfer fast path */
935coro_setup (pTHX_ struct coro *coro)
539{ 936{
540 /* 937 /*
541 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
542 */ 939 */
940 coro_init_stacks (aTHX);
941
942 PL_runops = RUNOPS_DEFAULT;
943 PL_curcop = &PL_compiling;
944 PL_in_eval = EVAL_NULL;
945 PL_comppad = 0;
946 PL_comppad_name = 0;
947 PL_comppad_name_fill = 0;
948 PL_comppad_name_floor = 0;
949 PL_curpm = 0;
950 PL_curpad = 0;
951 PL_localizing = 0;
952 PL_dirty = 0;
953 PL_restartop = 0;
954#if PERL_VERSION_ATLEAST (5,10,0)
955 PL_parser = 0;
956#endif
957 PL_hints = 0;
958
959 /* recreate the die/warn hooks */
960 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
961 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
962
963 GvSV (PL_defgv) = newSV (0);
964 GvAV (PL_defgv) = coro->args; coro->args = 0;
965 GvSV (PL_errgv) = newSV (0);
966 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
967 GvHV (PL_hintgv) = 0;
968 PL_rs = newSVsv (GvSV (irsgv));
969 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
970
971 {
972 dSP;
973 UNOP myop;
974
975 Zero (&myop, 1, UNOP);
976 myop.op_next = Nullop;
977 myop.op_type = OP_ENTERSUB;
978 myop.op_flags = OPf_WANT_VOID;
979
980 PUSHMARK (SP);
981 PUSHs ((SV *)coro->startcv);
982 PUTBACK;
983 PL_op = (OP *)&myop;
984 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
985 }
986
987 /* this newly created coroutine might be run on an existing cctx which most
988 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
989 */
990 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
991 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
992
993 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
994 coro_setup_op.op_next = PL_op;
995 coro_setup_op.op_type = OP_ENTERSUB;
996 coro_setup_op.op_ppaddr = pp_slf;
997 /* no flags etc. required, as an init function won't be called */
998
999 PL_op = (OP *)&coro_setup_op;
1000
1001 /* copy throw, in case it was set before coro_setup */
1002 CORO_THROW = coro->except;
1003
1004 if (expect_false (enable_times))
1005 {
1006 coro_times_update ();
1007 coro_times_sub (coro);
1008 }
1009}
1010
1011static void
1012coro_unwind_stacks (pTHX)
1013{
1014 if (!IN_DESTRUCT)
1015 {
1016 /* restore all saved variables and stuff */
1017 LEAVE_SCOPE (0);
1018 assert (PL_tmps_floor == -1);
1019
1020 /* free all temporaries */
1021 FREETMPS;
1022 assert (PL_tmps_ix == -1);
1023
1024 /* unwind all extra stacks */
1025 POPSTACK_TO (PL_mainstack);
1026
1027 /* unwind main stack */
1028 dounwind (-1);
1029 }
1030}
1031
1032static void
1033coro_destruct_perl (pTHX_ struct coro *coro)
1034{
1035 SV *svf [9];
1036
1037 {
1038 struct coro *current = SvSTATE_current;
1039
1040 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1041
1042 save_perl (aTHX_ current);
1043 load_perl (aTHX_ coro);
1044
1045 coro_unwind_stacks (aTHX);
1046 coro_destruct_stacks (aTHX);
1047
1048 // now save some sv's to be free'd later
1049 svf [0] = GvSV (PL_defgv);
1050 svf [1] = (SV *)GvAV (PL_defgv);
1051 svf [2] = GvSV (PL_errgv);
1052 svf [3] = (SV *)PL_defoutgv;
1053 svf [4] = PL_rs;
1054 svf [5] = GvSV (irsgv);
1055 svf [6] = (SV *)GvHV (PL_hintgv);
1056 svf [7] = PL_diehook;
1057 svf [8] = PL_warnhook;
1058 assert (9 == sizeof (svf) / sizeof (*svf));
1059
1060 load_perl (aTHX_ current);
1061 }
1062
1063 {
1064 unsigned int i;
1065
1066 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1067 SvREFCNT_dec (svf [i]);
1068
1069 SvREFCNT_dec (coro->saved_deffh);
1070 SvREFCNT_dec (coro->rouse_cb);
1071 SvREFCNT_dec (coro->invoke_cb);
1072 SvREFCNT_dec (coro->invoke_av);
1073 }
1074}
1075
1076INLINE void
1077free_coro_mortal (pTHX)
1078{
1079 if (expect_true (coro_mortal))
1080 {
1081 SvREFCNT_dec (coro_mortal);
1082 coro_mortal = 0;
1083 }
1084}
1085
1086static int
1087runops_trace (pTHX)
1088{
1089 COP *oldcop = 0;
1090 int oldcxix = -2;
1091
1092 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1093 {
1094 PERL_ASYNC_CHECK ();
1095
1096 if (cctx_current->flags & CC_TRACE_ALL)
1097 {
1098 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1099 {
1100 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1101 SV **bot, **top;
1102 AV *av = newAV (); /* return values */
1103 SV **cb;
1104 dSP;
1105
1106 GV *gv = CvGV (cx->blk_sub.cv);
1107 SV *fullname = sv_2mortal (newSV (0));
1108 if (isGV (gv))
1109 gv_efullname3 (fullname, gv, 0);
1110
1111 bot = PL_stack_base + cx->blk_oldsp + 1;
1112 top = cx->blk_gimme == G_ARRAY ? SP + 1
1113 : cx->blk_gimme == G_SCALAR ? bot + 1
1114 : bot;
1115
1116 av_extend (av, top - bot);
1117 while (bot < top)
1118 av_push (av, SvREFCNT_inc_NN (*bot++));
1119
1120 PL_runops = RUNOPS_DEFAULT;
1121 ENTER;
1122 SAVETMPS;
1123 EXTEND (SP, 3);
1124 PUSHMARK (SP);
1125 PUSHs (&PL_sv_no);
1126 PUSHs (fullname);
1127 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1128 PUTBACK;
1129 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1130 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1131 SPAGAIN;
1132 FREETMPS;
1133 LEAVE;
1134 PL_runops = runops_trace;
1135 }
1136
1137 if (oldcop != PL_curcop)
1138 {
1139 oldcop = PL_curcop;
1140
1141 if (PL_curcop != &PL_compiling)
1142 {
1143 SV **cb;
1144
1145 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1146 {
1147 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1148
1149 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1150 {
1151 dSP;
1152 GV *gv = CvGV (cx->blk_sub.cv);
1153 SV *fullname = sv_2mortal (newSV (0));
1154
1155 if (isGV (gv))
1156 gv_efullname3 (fullname, gv, 0);
1157
1158 PL_runops = RUNOPS_DEFAULT;
1159 ENTER;
1160 SAVETMPS;
1161 EXTEND (SP, 3);
1162 PUSHMARK (SP);
1163 PUSHs (&PL_sv_yes);
1164 PUSHs (fullname);
1165 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1166 PUTBACK;
1167 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1168 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1169 SPAGAIN;
1170 FREETMPS;
1171 LEAVE;
1172 PL_runops = runops_trace;
1173 }
1174
1175 oldcxix = cxstack_ix;
1176 }
1177
1178 if (cctx_current->flags & CC_TRACE_LINE)
1179 {
1180 dSP;
1181
1182 PL_runops = RUNOPS_DEFAULT;
1183 ENTER;
1184 SAVETMPS;
1185 EXTEND (SP, 3);
1186 PL_runops = RUNOPS_DEFAULT;
1187 PUSHMARK (SP);
1188 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1189 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1190 PUTBACK;
1191 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1192 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1193 SPAGAIN;
1194 FREETMPS;
1195 LEAVE;
1196 PL_runops = runops_trace;
1197 }
1198 }
1199 }
1200 }
1201 }
1202
1203 TAINT_NOT;
1204 return 0;
1205}
1206
1207static struct CoroSLF cctx_ssl_frame;
1208
1209static void
1210slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1211{
1212 ta->prev = 0;
1213}
1214
1215static int
1216slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1217{
1218 *frame = cctx_ssl_frame;
1219
1220 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1221}
1222
1223/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1224static void NOINLINE
1225cctx_prepare (pTHX)
1226{
1227 PL_top_env = &PL_start_env;
1228
1229 if (cctx_current->flags & CC_TRACE)
1230 PL_runops = runops_trace;
1231
1232 /* we already must be executing an SLF op, there is no other valid way
1233 * that can lead to creation of a new cctx */
1234 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1235 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1236
1237 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1238 cctx_ssl_frame = slf_frame;
1239
1240 slf_frame.prepare = slf_prepare_set_stacklevel;
1241 slf_frame.check = slf_check_set_stacklevel;
1242}
1243
1244/* the tail of transfer: execute stuff we can only do after a transfer */
1245INLINE void
1246transfer_tail (pTHX)
1247{
1248 free_coro_mortal (aTHX);
1249}
1250
1251/*
1252 * this is a _very_ stripped down perl interpreter ;)
1253 */
1254static void
1255cctx_run (void *arg)
1256{
1257#ifdef USE_ITHREADS
1258# if CORO_PTHREAD
1259 PERL_SET_CONTEXT (coro_thx);
1260# endif
1261#endif
1262 {
1263 dTHX;
1264
1265 /* normally we would need to skip the entersub here */
1266 /* not doing so will re-execute it, which is exactly what we want */
1267 /* PL_nop = PL_nop->op_next */
1268
1269 /* inject a fake subroutine call to cctx_init */
1270 cctx_prepare (aTHX);
1271
1272 /* cctx_run is the alternative tail of transfer() */
1273 transfer_tail (aTHX);
1274
1275 /* somebody or something will hit me for both perl_run and PL_restartop */
1276 PL_restartop = PL_op;
1277 perl_run (PL_curinterp);
1278 /*
1279 * Unfortunately, there is no way to get at the return values of the
1280 * coro body here, as perl_run destroys these
1281 */
1282
1283 /*
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 }
1295}
1296
1297static coro_cctx *
1298cctx_new ()
1299{
1300 coro_cctx *cctx;
1301
1302 ++cctx_count;
1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1329 void *stack_start;
1330 size_t stack_size;
1331
1332#if HAVE_MMAP
1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1334 /* mmap supposedly does allocate-on-write for us */
1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1336
1337 if (cctx->sptr != (void *)-1)
1338 {
1339 #if CORO_STACKGUARD
1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1341 #endif
1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1344 cctx->flags |= CC_MAPPED;
1345 }
1346 else
1347#endif
1348 {
1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1350 New (0, cctx->sptr, cctx_stacksize, long);
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
1362 #if CORO_USE_VALGRIND
1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1364 #endif
1365
1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1367
1368 return cctx;
1369}
1370
1371static void
1372cctx_destroy (coro_cctx *cctx)
1373{
1374 if (!cctx)
1375 return;
1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1385 #if CORO_USE_VALGRIND
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
1393#endif
1394 Safefree (cctx->sptr);
1395 }
1396
1397 Safefree (cctx);
1398}
1399
1400/* wether this cctx should be destructed */
1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1402
1403static coro_cctx *
1404cctx_get (pTHX)
1405{
1406 while (expect_true (cctx_first))
1407 {
1408 coro_cctx *cctx = cctx_first;
1409 cctx_first = cctx->next;
1410 --cctx_idle;
1411
1412 if (expect_true (!CCTX_EXPIRED (cctx)))
1413 return cctx;
1414
1415 cctx_destroy (cctx);
1416 }
1417
1418 return cctx_new_run ();
1419}
1420
1421static void
1422cctx_put (coro_cctx *cctx)
1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1426 /* free another cctx if overlimit */
1427 if (expect_false (cctx_idle >= cctx_max_idle))
1428 {
1429 coro_cctx *first = cctx_first;
1430 cctx_first = first->next;
1431 --cctx_idle;
1432
1433 cctx_destroy (first);
1434 }
1435
1436 ++cctx_idle;
1437 cctx->next = cctx_first;
1438 cctx_first = cctx;
1439}
1440
1441/** coroutine switching *****************************************************/
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 */
1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1466{
1467 dSTACKLEVEL;
1468
1469 /* sometimes transfer is only called to set idle_sp */
1470 if (expect_false (!prev))
1471 {
1472 cctx_current->idle_sp = STACKLEVEL;
1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1474 }
1475 else if (expect_true (prev != next))
1476 {
1477 coro_cctx *cctx_prev;
1478
1479 if (expect_false (prev->flags & CF_NEW))
1480 {
1481 /* create a new empty/source context */
1482 prev->flags &= ~CF_NEW;
1483 prev->flags |= CF_RUNNING;
1484 }
1485
1486 prev->flags &= ~CF_RUNNING;
1487 next->flags |= CF_RUNNING;
1488
1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
1491
1492 if (expect_false (next->flags & CF_NEW))
1493 {
1494 /* need to start coroutine */
1495 next->flags &= ~CF_NEW;
1496 /* setup coroutine call */
1497 coro_setup (aTHX_ next);
1498 }
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 ))
1508 {
1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
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);
1519 }
1520 else
1521 prev->cctx = cctx_current;
1522
1523 ++next->usecount;
1524
1525 cctx_prev = cctx_current;
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))
1531 {
1532 cctx_prev->top_env = PL_top_env;
1533 PL_top_env = cctx_current->top_env;
1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1535 }
1536
1537 transfer_tail (aTHX);
1538 }
1539}
1540
1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1543
1544/** high level stuff ********************************************************/
1545
1546static int
1547coro_state_destroy (pTHX_ struct coro *coro)
1548{
1549 if (coro->flags & CF_DESTROYED)
1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1554
1555 coro->flags |= CF_DESTROYED;
1556
1557 if (coro->flags & CF_READY)
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);
1571
1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1574 SvREFCNT_dec (coro->args);
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;
1582}
1583
1584static int
1585coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1586{
1587 struct coro *coro = (struct coro *)mg->mg_ptr;
1588 mg->mg_ptr = 0;
1589
1590 coro->hv = 0;
1591
1592 if (--coro->refcnt < 0)
1593 {
1594 coro_state_destroy (aTHX_ coro);
1595 Safefree (coro);
1596 }
1597
1598 return 0;
1599}
1600
1601static int
1602coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1603{
1604 struct coro *coro = (struct coro *)mg->mg_ptr;
1605
1606 ++coro->refcnt;
1607
1608 return 0;
1609}
1610
1611static MGVTBL coro_state_vtbl = {
1612 0, 0, 0, 0,
1613 coro_state_free,
1614 0,
1615#ifdef MGf_DUP
1616 coro_state_dup,
1617#else
1618# define MGf_DUP 0
1619#endif
1620};
1621
1622static void
1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1624{
1625 ta->prev = SvSTATE (prev_sv);
1626 ta->next = SvSTATE (next_sv);
1627 TRANSFER_CHECK (*ta);
1628}
1629
1630static void
1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1632{
1633 struct coro_transfer_args ta;
1634
1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1636 TRANSFER (ta, 1);
1637}
1638
1639/** Coro ********************************************************************/
1640
1641INLINE void
1642coro_enq (pTHX_ struct coro *coro)
1643{
1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1645
1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1659 {
1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1669
1670 return 0;
1671}
1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
543 dTHX; 1676 dTHX;
544 dSP; 1677 dSP;
545 UNOP myop;
546 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547 1678
548 coro_init_stacks (aTHX); 1679 ENTER;
549 /*PL_curcop = 0;*/ 1680 SAVETMPS;
550 /*PL_in_eval = PL_in_eval;*/ /* inherit */
551 SvREFCNT_dec (GvAV (PL_defgv));
552 GvAV (PL_defgv) = coro->args; coro->args = 0;
553 1681
554 SPAGAIN;
555
556 Zero (&myop, 1, UNOP);
557 myop.op_next = Nullop;
558 myop.op_flags = OPf_WANT_VOID;
559
560 PL_op = (OP *)&myop;
561
562 PUSHMARK(SP); 1682 PUSHMARK (SP);
563 XPUSHs (sub_init);
564 PUTBACK; 1683 PUTBACK;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
566 SPAGAIN;
567 1685
568 ENTER; /* necessary e.g. for dounwind */ 1686 FREETMPS;
1687 LEAVE;
569} 1688}
570 1689
571static void 1690static int
572free_coro_mortal () 1691api_ready (pTHX_ SV *coro_sv)
573{ 1692{
574 if (coro_mortal) 1693 struct coro *coro = SvSTATE (coro_sv);
575 {
576 SvREFCNT_dec (coro_mortal);
577 coro_mortal = 0;
578 }
579}
580 1694
581static void 1695 if (coro->flags & CF_READY)
582coro_run (void *arg)
583{
584 /*
585 * this is a _very_ stripped down perl interpreter ;)
586 */
587 dTHX;
588 int ret;
589
590 UNLOCK;
591
592 PL_top_env = &PL_start_env;
593
594 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
595 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597 /* continue at cctx_init, without entersub */
598 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600 /* somebody will hit me for both perl_run and PL_restartop */
601 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602 printf ("ret %d\n", ret);//D
603
604 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605 abort ();
606}
607
608static coro_stack *
609stack_new ()
610{
611 coro_stack *stack;
612
613 New (0, stack, 1, coro_stack);
614
615#if HAVE_MMAP
616
617 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
618 /* mmap suppsedly does allocate-on-write for us */
619 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620
621 if (stack->sptr == (void *)-1)
622 {
623 perror ("FATAL: unable to mmap stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627# if STACKGUARD
628 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
629# endif
630
631#else
632
633 stack->ssize = STACKSIZE * (long)sizeof (long);
634 New (0, stack->sptr, STACKSIZE, long);
635
636 if (!stack->sptr)
637 {
638 perror (stderr, "FATAL: unable to malloc stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642#endif
643
644 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
645
646 return stack;
647}
648
649static void
650stack_free (coro_stack *stack)
651{
652 if (!stack || stack == main_stack)
653 return; 1696 return 0;
654 1697
655#if HAVE_MMAP 1698 coro->flags |= CF_READY;
656 munmap (stack->sptr, stack->ssize);
657#else
658 Safefree (stack->sptr);
659#endif
660 1699
661 Safefree (stack); 1700 coro_enq (aTHX_ coro);
662}
663 1701
664static coro_stack *stack_first; 1702 if (!coro_nready++)
1703 if (coroapi.readyhook)
1704 coroapi.readyhook ();
665 1705
666static coro_stack * 1706 return 1;
667stack_get () 1707}
668{
669 coro_stack *stack;
670 1708
671 if (stack_first) 1709static int
672 { 1710api_is_ready (pTHX_ SV *coro_sv)
673 stack = stack_first; 1711{
674 stack_first = stack->next; 1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
675 } 1713}
676 else 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 (;;)
677 { 1736 {
678 stack = stack_new (); 1737 struct coro *next = coro_deq (aTHX);
679 PL_op = PL_op->op_next;
680 }
681 1738
682 return stack; 1739 if (expect_true (next))
683}
684
685static void
686stack_put (coro_stack *stack)
687{
688 stack->next = stack_first;
689 stack_first = stack;
690}
691
692/* never call directly, always through the coro_state_transfer global variable */
693static void
694transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
695{
696 dSTACKLEVEL;
697
698 /* sometimes transfer is only called to set idle_sp */
699 if (flags == TRANSFER_SET_STACKLEVEL)
700 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
701 else if (prev != next)
702 {
703 coro_stack *prev__stack;
704
705 LOCK;
706
707 if (next->mainstack)
708 { 1740 {
709 /* coroutine already started */ 1741 /* cannot transfer to destroyed coros, skip and look for next */
710 SAVE (prev, flags); 1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
711 LOAD (next); 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 }
712 } 1752 }
713 else 1753 else
714 { 1754 {
715 /* need to start coroutine */ 1755 /* nothing to schedule: call the idle handler */
716 /* first get rid of the old state */ 1756 if (SvROK (sv_idle)
717 SAVE (prev, -1); 1757 && SvOBJECT (SvRV (sv_idle)))
718 /* setup coroutine call */ 1758 {
719 setup_coro (next); 1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
720 /* need a stack */ 1760 api_ready (aTHX_ SvRV (sv_idle));
721 next->stack = 0; 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 }
722 } 1777 }
1778 }
1779}
723 1780
724 prev__stack = prev->stack; 1781INLINE void
1782prepare_cede (pTHX_ struct coro_transfer_args *ta)
1783{
1784 api_ready (aTHX_ coro_current);
1785 prepare_schedule (aTHX_ ta);
1786}
725 1787
726 /* possibly "free" the stack */ 1788INLINE void
727 if (prev__stack->idle_sp == STACKLEVEL) 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
1857 if (coro->flags & CF_RUNNING)
1858 croak ("cannot enable tracing on a running coroutine, caught");
1859
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");
1866
1867 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1868 }
1869 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1870 {
1871 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1872
1873 if (coro->flags & CF_RUNNING)
1874 PL_runops = RUNOPS_DEFAULT;
1875 else
1876 coro->slot->runops = RUNOPS_DEFAULT;
1877 }
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)
728 { 1891 {
729 stack_put (prev__stack); 1892 dSP; /* don't disturb outer sp */
730 prev->stack = 0; 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);
731 } 1909 }
732
733 if (!next->stack)
734 next->stack = stack_get ();
735
736 if (prev__stack != next->stack)
737 {
738 prev__stack->top_env = PL_top_env;
739 PL_top_env = next->stack->top_env;
740 printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 }
748}
749
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args
756{
757 struct coro *prev, *next;
758 int flags;
759};
760
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void
764coro_state_destroy (struct coro *coro)
765{
766 if (coro->refcnt--)
767 return;
768
769 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 1910 }
771 struct coro temp;
772
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
774 LOAD (aTHX_ coro);
775
776 destroy_stacks (aTHX);
777
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */
779
780 coro->mainstack = 0;
781 }
782
783 stack_free (coro->stack);
784 SvREFCNT_dec (coro->args);
785 Safefree (coro);
786} 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 av_extend (av, items - 1);
1921 for (i = 0; i < items; ++i)
1922 av_push (av, SvREFCNT_inc_NN (arg [i]));
1923
1924 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1925
1926 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1927 api_ready (aTHX_ sv_manager);
1928
1929 frame->prepare = prepare_schedule;
1930 frame->check = slf_check_repeat;
1931
1932 /* as a minor optimisation, we could unwind all stacks here */
1933 /* but that puts extra pressure on pp_slf, and is not worth much */
1934 /*coro_unwind_stacks (aTHX);*/
1935}
1936
1937/*****************************************************************************/
1938/* async pool handler */
787 1939
788static int 1940static int
789coro_state_clear (SV *sv, MAGIC *mg) 1941slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
790{ 1942{
1943 HV *hv = (HV *)SvRV (coro_current);
791 struct coro *coro = (struct coro *)mg->mg_ptr; 1944 struct coro *coro = (struct coro *)frame->data;
792 mg->mg_ptr = 0;
793 1945
794 coro_state_destroy (coro); 1946 if (!coro->invoke_cb)
795 1947 return 1; /* loop till we have invoke */
796 return 0; 1948 else
797}
798
799static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
801{
802 struct coro *coro = (struct coro *)mg->mg_ptr;
803
804 ++coro->refcnt;
805
806 return 0;
807}
808
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
810
811static struct coro *
812SvSTATE (SV *coro)
813{
814 HV *stash;
815 MAGIC *mg;
816
817 if (SvROK (coro))
818 coro = SvRV (coro);
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832
833static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
835{
836 ta->prev = SvSTATE (prev);
837 ta->next = SvSTATE (next);
838 ta->flags = flags;
839}
840
841static void
842api_transfer (SV *prev, SV *next, int flags)
843{
844 dTHX;
845 struct transfer_args ta;
846
847 prepare_transfer (aTHX_ &ta, prev, next, flags);
848 TRANSFER (ta);
849}
850
851/** Coro ********************************************************************/
852
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void
866coro_enq (pTHX_ SV *sv)
867{
868 int prio;
869
870 if (SvTYPE (sv) != SVt_PVHV)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (pTHX_ int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0)
890 { 1949 {
891 coro_nready--; 1950 hv_store (hv, "desc", sizeof ("desc") - 1,
892 return av_shift (coro_ready [prio]); 1951 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
893 }
894 1952
895 return 0; 1953 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
896}
897
898static void
899api_ready (SV *coro)
900{
901 dTHX;
902
903 if (SvROK (coro))
904 coro = SvRV (coro);
905
906 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro));
908 UNLOCK;
909}
910
911static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930 1954
931 { 1955 {
932 dSP; 1956 dSP;
933 1957 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 1958 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 1959 }
1960
1961 SvREFCNT_dec (GvAV (PL_defgv));
1962 GvAV (PL_defgv) = coro->invoke_av;
1963 coro->invoke_av = 0;
1964
1965 return 0;
1966 }
1967}
1968
1969static void
1970slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1971{
1972 HV *hv = (HV *)SvRV (coro_current);
1973 struct coro *coro = SvSTATE_hv ((SV *)hv);
1974
1975 if (expect_true (coro->saved_deffh))
944 } 1976 {
1977 /* subsequent iteration */
1978 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1979 coro->saved_deffh = 0;
945 1980
946 prev = SvRV (current); 1981 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 1982 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1983 {
1984 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1985 coro->invoke_av = newAV ();
948 1986
949 /* free this only after the transfer */ 1987 frame->prepare = prepare_nop;
950 free_coro_mortal (); 1988 }
951 coro_mortal = prev; 1989 else
1990 {
1991 av_clear (GvAV (PL_defgv));
1992 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
952 1993
953 ta->prev = SvSTATE (prev); 1994 coro->prio = 0;
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956 1995
957 UNLOCK; 1996 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
958} 1997 api_trace (aTHX_ coro_current, 0);
959 1998
1999 frame->prepare = prepare_schedule;
2000 av_push (av_async_pool, SvREFCNT_inc (hv));
2001 }
2002 }
2003 else
2004 {
2005 /* first iteration, simply fall through */
2006 frame->prepare = prepare_nop;
2007 }
2008
2009 frame->check = slf_check_pool_handler;
2010 frame->data = (void *)coro;
2011}
2012
2013/*****************************************************************************/
2014/* rouse callback */
2015
2016#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2017
2018static void
2019coro_rouse_callback (pTHX_ CV *cv)
2020{
2021 dXSARGS;
2022 SV *data = (SV *)S_GENSUB_ARG;
2023
2024 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2025 {
2026 /* first call, set args */
2027 SV *coro = SvRV (data);
2028 AV *av = newAV ();
2029
2030 SvRV_set (data, (SV *)av);
2031
2032 /* better take a full copy of the arguments */
2033 while (items--)
2034 av_store (av, items, newSVsv (ST (items)));
2035
2036 api_ready (aTHX_ coro);
2037 SvREFCNT_dec (coro);
2038 }
2039
2040 XSRETURN_EMPTY;
2041}
2042
960static void 2043static int
2044slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2045{
2046 SV *data = (SV *)frame->data;
2047
2048 if (CORO_THROW)
2049 return 0;
2050
2051 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2052 return 1;
2053
2054 /* now push all results on the stack */
2055 {
2056 dSP;
2057 AV *av = (AV *)SvRV (data);
2058 int i;
2059
2060 EXTEND (SP, AvFILLp (av) + 1);
2061 for (i = 0; i <= AvFILLp (av); ++i)
2062 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2063
2064 /* we have stolen the elements, so set length to zero and free */
2065 AvFILLp (av) = -1;
2066 av_undef (av);
2067
2068 PUTBACK;
2069 }
2070
2071 return 0;
2072}
2073
2074static void
2075slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2076{
2077 SV *cb;
2078
2079 if (items)
2080 cb = arg [0];
2081 else
2082 {
2083 struct coro *coro = SvSTATE_current;
2084
2085 if (!coro->rouse_cb)
2086 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2087
2088 cb = sv_2mortal (coro->rouse_cb);
2089 coro->rouse_cb = 0;
2090 }
2091
2092 if (!SvROK (cb)
2093 || SvTYPE (SvRV (cb)) != SVt_PVCV
2094 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2095 croak ("Coro::rouse_wait called with illegal callback argument,");
2096
2097 {
2098 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2099 SV *data = (SV *)S_GENSUB_ARG;
2100
2101 frame->data = (void *)data;
2102 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2103 frame->check = slf_check_rouse_wait;
2104 }
2105}
2106
2107static SV *
2108coro_new_rouse_cb (pTHX)
2109{
2110 HV *hv = (HV *)SvRV (coro_current);
2111 struct coro *coro = SvSTATE_hv (hv);
2112 SV *data = newRV_inc ((SV *)hv);
2113 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2114
2115 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2116 SvREFCNT_dec (data); /* magicext increases the refcount */
2117
2118 SvREFCNT_dec (coro->rouse_cb);
2119 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2120
2121 return cb;
2122}
2123
2124/*****************************************************************************/
2125/* schedule-like-function opcode (SLF) */
2126
2127static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2128static const CV *slf_cv;
2129static SV **slf_argv;
2130static int slf_argc, slf_arga; /* count, allocated */
2131static I32 slf_ax; /* top of stack, for restore */
2132
2133/* this restores the stack in the case we patched the entersub, to */
2134/* recreate the stack frame as perl will on following calls */
2135/* since entersub cleared the stack */
2136static OP *
2137pp_restore (pTHX)
2138{
2139 int i;
2140 SV **SP = PL_stack_base + slf_ax;
2141
2142 PUSHMARK (SP);
2143
2144 EXTEND (SP, slf_argc + 1);
2145
2146 for (i = 0; i < slf_argc; ++i)
2147 PUSHs (sv_2mortal (slf_argv [i]));
2148
2149 PUSHs ((SV *)CvGV (slf_cv));
2150
2151 RETURNOP (slf_restore.op_first);
2152}
2153
2154static void
2155slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2156{
2157 SV **arg = (SV **)slf_frame.data;
2158
2159 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2160}
2161
2162static void
2163slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2164{
2165 if (items != 2)
2166 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2167
2168 frame->prepare = slf_prepare_transfer;
2169 frame->check = slf_check_nop;
2170 frame->data = (void *)arg; /* let's hope it will stay valid */
2171}
2172
2173static void
2174slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 frame->prepare = prepare_schedule;
2177 frame->check = slf_check_nop;
2178}
2179
2180static void
961prepare_cede (aTHX_ struct transfer_args *ta) 2181slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2182{
963 LOCK; 2183 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2184
2185 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2186 prepare_schedule_to (aTHX_ ta, next);
968} 2187}
969 2188
970static void 2189static void
971api_schedule (void) 2190slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2191{
973 dTHX; 2192 if (!items)
2193 croak ("Coro::schedule_to expects a coroutine argument, caught");
2194
2195 frame->data = (void *)SvSTATE (arg [0]);
2196 frame->prepare = slf_prepare_schedule_to;
2197 frame->check = slf_check_nop;
2198}
2199
2200static void
2201slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2202{
2203 api_ready (aTHX_ SvRV (coro_current));
2204
2205 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2206}
2207
2208static void
2209slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 frame->prepare = prepare_cede;
2212 frame->check = slf_check_nop;
2213}
2214
2215static void
2216slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2217{
2218 frame->prepare = prepare_cede_notself;
2219 frame->check = slf_check_nop;
2220}
2221
2222/*
2223 * these not obviously related functions are all rolled into one
2224 * function to increase chances that they all will call transfer with the same
2225 * stack offset
2226 * SLF stands for "schedule-like-function".
2227 */
2228static OP *
2229pp_slf (pTHX)
2230{
2231 I32 checkmark; /* mark SP to see how many elements check has pushed */
2232
2233 /* set up the slf frame, unless it has already been set-up */
2234 /* the latter happens when a new coro has been started */
2235 /* or when a new cctx was attached to an existing coroutine */
2236 if (expect_true (!slf_frame.prepare))
2237 {
2238 /* first iteration */
2239 dSP;
2240 SV **arg = PL_stack_base + TOPMARK + 1;
2241 int items = SP - arg; /* args without function object */
2242 SV *gv = *sp;
2243
2244 /* do a quick consistency check on the "function" object, and if it isn't */
2245 /* for us, divert to the real entersub */
2246 if (SvTYPE (gv) != SVt_PVGV
2247 || !GvCV (gv)
2248 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2249 return PL_ppaddr[OP_ENTERSUB](aTHX);
2250
2251 if (!(PL_op->op_flags & OPf_STACKED))
2252 {
2253 /* ampersand-form of call, use @_ instead of stack */
2254 AV *av = GvAV (PL_defgv);
2255 arg = AvARRAY (av);
2256 items = AvFILLp (av) + 1;
2257 }
2258
2259 /* now call the init function, which needs to set up slf_frame */
2260 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2261 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2262
2263 /* pop args */
2264 SP = PL_stack_base + POPMARK;
2265
2266 PUTBACK;
2267 }
2268
2269 /* now that we have a slf_frame, interpret it! */
2270 /* we use a callback system not to make the code needlessly */
2271 /* complicated, but so we can run multiple perl coros from one cctx */
2272
2273 do
2274 {
974 struct transfer_args ta; 2275 struct coro_transfer_args ta;
975 2276
976 prepare_schedule (&ta); 2277 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2278 TRANSFER (ta, 0);
978}
979 2279
2280 checkmark = PL_stack_sp - PL_stack_base;
2281 }
2282 while (slf_frame.check (aTHX_ &slf_frame));
2283
2284 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2285
2286 /* exception handling */
2287 if (expect_false (CORO_THROW))
2288 {
2289 SV *exception = sv_2mortal (CORO_THROW);
2290
2291 CORO_THROW = 0;
2292 sv_setsv (ERRSV, exception);
2293 croak (0);
2294 }
2295
2296 /* return value handling - mostly like entersub */
2297 /* make sure we put something on the stack in scalar context */
2298 if (GIMME_V == G_SCALAR)
2299 {
2300 dSP;
2301 SV **bot = PL_stack_base + checkmark;
2302
2303 if (sp == bot) /* too few, push undef */
2304 bot [1] = &PL_sv_undef;
2305 else if (sp != bot + 1) /* too many, take last one */
2306 bot [1] = *sp;
2307
2308 SP = bot + 1;
2309
2310 PUTBACK;
2311 }
2312
2313 return NORMAL;
2314}
2315
2316static void
2317api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2318{
2319 int i;
2320 SV **arg = PL_stack_base + ax;
2321 int items = PL_stack_sp - arg + 1;
2322
2323 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2324
2325 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2326 && PL_op->op_ppaddr != pp_slf)
2327 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2328
2329 CvFLAGS (cv) |= CVf_SLF;
2330 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2331 slf_cv = cv;
2332
2333 /* we patch the op, and then re-run the whole call */
2334 /* we have to put the same argument on the stack for this to work */
2335 /* and this will be done by pp_restore */
2336 slf_restore.op_next = (OP *)&slf_restore;
2337 slf_restore.op_type = OP_CUSTOM;
2338 slf_restore.op_ppaddr = pp_restore;
2339 slf_restore.op_first = PL_op;
2340
2341 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2342
2343 if (PL_op->op_flags & OPf_STACKED)
2344 {
2345 if (items > slf_arga)
2346 {
2347 slf_arga = items;
2348 free (slf_argv);
2349 slf_argv = malloc (slf_arga * sizeof (SV *));
2350 }
2351
2352 slf_argc = items;
2353
2354 for (i = 0; i < items; ++i)
2355 slf_argv [i] = SvREFCNT_inc (arg [i]);
2356 }
2357 else
2358 slf_argc = 0;
2359
2360 PL_op->op_ppaddr = pp_slf;
2361 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2362
2363 PL_op = (OP *)&slf_restore;
2364}
2365
2366/*****************************************************************************/
2367/* dynamic wind */
2368
2369static void
2370on_enterleave_call (pTHX_ SV *cb)
2371{
2372 dSP;
2373
2374 PUSHSTACK;
2375
2376 PUSHMARK (SP);
2377 PUTBACK;
2378 call_sv (cb, G_VOID | G_DISCARD);
2379 SPAGAIN;
2380
2381 POPSTACK;
2382}
2383
2384static SV *
2385coro_avp_pop_and_free (pTHX_ AV **avp)
2386{
2387 AV *av = *avp;
2388 SV *res = av_pop (av);
2389
2390 if (AvFILLp (av) < 0)
2391 {
2392 *avp = 0;
2393 SvREFCNT_dec (av);
2394 }
2395
2396 return res;
2397}
2398
2399static void
2400coro_pop_on_enter (pTHX_ void *coro)
2401{
2402 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2403 SvREFCNT_dec (cb);
2404}
2405
2406static void
2407coro_pop_on_leave (pTHX_ void *coro)
2408{
2409 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2410 on_enterleave_call (aTHX_ sv_2mortal (cb));
2411}
2412
2413/*****************************************************************************/
2414/* PerlIO::cede */
2415
2416typedef struct
2417{
2418 PerlIOBuf base;
2419 NV next, every;
2420} PerlIOCede;
2421
2422static IV
2423PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2424{
2425 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2426
2427 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2428 self->next = nvtime () + self->every;
2429
2430 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2431}
2432
2433static SV *
2434PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2435{
2436 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2437
2438 return newSVnv (self->every);
2439}
2440
2441static IV
2442PerlIOCede_flush (pTHX_ PerlIO *f)
2443{
2444 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2445 double now = nvtime ();
2446
2447 if (now >= self->next)
2448 {
2449 api_cede (aTHX);
2450 self->next = now + self->every;
2451 }
2452
2453 return PerlIOBuf_flush (aTHX_ f);
2454}
2455
2456static PerlIO_funcs PerlIO_cede =
2457{
2458 sizeof(PerlIO_funcs),
2459 "cede",
2460 sizeof(PerlIOCede),
2461 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2462 PerlIOCede_pushed,
2463 PerlIOBuf_popped,
2464 PerlIOBuf_open,
2465 PerlIOBase_binmode,
2466 PerlIOCede_getarg,
2467 PerlIOBase_fileno,
2468 PerlIOBuf_dup,
2469 PerlIOBuf_read,
2470 PerlIOBuf_unread,
2471 PerlIOBuf_write,
2472 PerlIOBuf_seek,
2473 PerlIOBuf_tell,
2474 PerlIOBuf_close,
2475 PerlIOCede_flush,
2476 PerlIOBuf_fill,
2477 PerlIOBase_eof,
2478 PerlIOBase_error,
2479 PerlIOBase_clearerr,
2480 PerlIOBase_setlinebuf,
2481 PerlIOBuf_get_base,
2482 PerlIOBuf_bufsiz,
2483 PerlIOBuf_get_ptr,
2484 PerlIOBuf_get_cnt,
2485 PerlIOBuf_set_ptrcnt,
2486};
2487
2488/*****************************************************************************/
2489/* Coro::Semaphore & Coro::Signal */
2490
2491static SV *
2492coro_waitarray_new (pTHX_ int count)
2493{
2494 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2495 AV *av = newAV ();
2496 SV **ary;
2497
2498 /* unfortunately, building manually saves memory */
2499 Newx (ary, 2, SV *);
2500 AvALLOC (av) = ary;
2501#if PERL_VERSION_ATLEAST (5,10,0)
2502 AvARRAY (av) = ary;
2503#else
2504 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2505 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2506 SvPVX ((SV *)av) = (char *)ary;
2507#endif
2508 AvMAX (av) = 1;
2509 AvFILLp (av) = 0;
2510 ary [0] = newSViv (count);
2511
2512 return newRV_noinc ((SV *)av);
2513}
2514
2515/* semaphore */
2516
2517static void
2518coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2519{
2520 SV *count_sv = AvARRAY (av)[0];
2521 IV count = SvIVX (count_sv);
2522
2523 count += adjust;
2524 SvIVX (count_sv) = count;
2525
2526 /* now wake up as many waiters as are expected to lock */
2527 while (count > 0 && AvFILLp (av) > 0)
2528 {
2529 SV *cb;
2530
2531 /* swap first two elements so we can shift a waiter */
2532 AvARRAY (av)[0] = AvARRAY (av)[1];
2533 AvARRAY (av)[1] = count_sv;
2534 cb = av_shift (av);
2535
2536 if (SvOBJECT (cb))
2537 {
2538 api_ready (aTHX_ cb);
2539 --count;
2540 }
2541 else if (SvTYPE (cb) == SVt_PVCV)
2542 {
2543 dSP;
2544 PUSHMARK (SP);
2545 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2546 PUTBACK;
2547 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2548 }
2549
2550 SvREFCNT_dec (cb);
2551 }
2552}
2553
2554static void
2555coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2556{
2557 /* call $sem->adjust (0) to possibly wake up some other waiters */
2558 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2559}
2560
980static void 2561static int
981api_cede (void) 2562slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 2563{
983 dTHX; 2564 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 2565 SV *count_sv = AvARRAY (av)[0];
985 2566
986 prepare_cede (&ta); 2567 /* if we are about to throw, don't actually acquire the lock, just throw */
987 TRANSFER (ta); 2568 if (CORO_THROW)
988} 2569 return 0;
2570 else if (SvIVX (count_sv) > 0)
2571 {
2572 SvSTATE_current->on_destroy = 0;
989 2573
2574 if (acquire)
2575 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2576 else
2577 coro_semaphore_adjust (aTHX_ av, 0);
2578
2579 return 0;
2580 }
2581 else
2582 {
2583 int i;
2584 /* if we were woken up but can't down, we look through the whole */
2585 /* waiters list and only add us if we aren't in there already */
2586 /* this avoids some degenerate memory usage cases */
2587
2588 for (i = 1; i <= AvFILLp (av); ++i)
2589 if (AvARRAY (av)[i] == SvRV (coro_current))
2590 return 1;
2591
2592 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2593 return 1;
2594 }
2595}
2596
2597static int
2598slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2599{
2600 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2601}
2602
2603static int
2604slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2607}
2608
2609static void
2610slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2611{
2612 AV *av = (AV *)SvRV (arg [0]);
2613
2614 if (SvIVX (AvARRAY (av)[0]) > 0)
2615 {
2616 frame->data = (void *)av;
2617 frame->prepare = prepare_nop;
2618 }
2619 else
2620 {
2621 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2622
2623 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2624 frame->prepare = prepare_schedule;
2625
2626 /* to avoid race conditions when a woken-up coro gets terminated */
2627 /* we arrange for a temporary on_destroy that calls adjust (0) */
2628 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2629 }
2630}
2631
2632static void
2633slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2634{
2635 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2636 frame->check = slf_check_semaphore_down;
2637}
2638
2639static void
2640slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2641{
2642 if (items >= 2)
2643 {
2644 /* callback form */
2645 AV *av = (AV *)SvRV (arg [0]);
2646 SV *cb_cv = s_get_cv_croak (arg [1]);
2647
2648 av_push (av, SvREFCNT_inc_NN (cb_cv));
2649
2650 if (SvIVX (AvARRAY (av)[0]) > 0)
2651 coro_semaphore_adjust (aTHX_ av, 0);
2652
2653 frame->prepare = prepare_nop;
2654 frame->check = slf_check_nop;
2655 }
2656 else
2657 {
2658 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2659 frame->check = slf_check_semaphore_wait;
2660 }
2661}
2662
2663/* signal */
2664
2665static void
2666coro_signal_wake (pTHX_ AV *av, int count)
2667{
2668 SvIVX (AvARRAY (av)[0]) = 0;
2669
2670 /* now signal count waiters */
2671 while (count > 0 && AvFILLp (av) > 0)
2672 {
2673 SV *cb;
2674
2675 /* swap first two elements so we can shift a waiter */
2676 cb = AvARRAY (av)[0];
2677 AvARRAY (av)[0] = AvARRAY (av)[1];
2678 AvARRAY (av)[1] = cb;
2679
2680 cb = av_shift (av);
2681
2682 if (SvTYPE (cb) == SVt_PVCV)
2683 {
2684 dSP;
2685 PUSHMARK (SP);
2686 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2687 PUTBACK;
2688 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2689 }
2690 else
2691 {
2692 api_ready (aTHX_ cb);
2693 sv_setiv (cb, 0); /* signal waiter */
2694 }
2695
2696 SvREFCNT_dec (cb);
2697
2698 --count;
2699 }
2700}
2701
2702static int
2703slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2704{
2705 /* if we are about to throw, also stop waiting */
2706 return SvROK ((SV *)frame->data) && !CORO_THROW;
2707}
2708
2709static void
2710slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2711{
2712 AV *av = (AV *)SvRV (arg [0]);
2713
2714 if (items >= 2)
2715 {
2716 SV *cb_cv = s_get_cv_croak (arg [1]);
2717 av_push (av, SvREFCNT_inc_NN (cb_cv));
2718
2719 if (SvIVX (AvARRAY (av)[0]))
2720 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2721
2722 frame->prepare = prepare_nop;
2723 frame->check = slf_check_nop;
2724 }
2725 else if (SvIVX (AvARRAY (av)[0]))
2726 {
2727 SvIVX (AvARRAY (av)[0]) = 0;
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else
2732 {
2733 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2734
2735 av_push (av, waiter);
2736
2737 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2738 frame->prepare = prepare_schedule;
2739 frame->check = slf_check_signal_wait;
2740 }
2741}
2742
2743/*****************************************************************************/
2744/* Coro::AIO */
2745
2746#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2747
2748/* helper storage struct */
2749struct io_state
2750{
2751 int errorno;
2752 I32 laststype; /* U16 in 5.10.0 */
2753 int laststatval;
2754 Stat_t statcache;
2755};
2756
2757static void
2758coro_aio_callback (pTHX_ CV *cv)
2759{
2760 dXSARGS;
2761 AV *state = (AV *)S_GENSUB_ARG;
2762 SV *coro = av_pop (state);
2763 SV *data_sv = newSV (sizeof (struct io_state));
2764
2765 av_extend (state, items - 1);
2766
2767 sv_upgrade (data_sv, SVt_PV);
2768 SvCUR_set (data_sv, sizeof (struct io_state));
2769 SvPOK_only (data_sv);
2770
2771 {
2772 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2773
2774 data->errorno = errno;
2775 data->laststype = PL_laststype;
2776 data->laststatval = PL_laststatval;
2777 data->statcache = PL_statcache;
2778 }
2779
2780 /* now build the result vector out of all the parameters and the data_sv */
2781 {
2782 int i;
2783
2784 for (i = 0; i < items; ++i)
2785 av_push (state, SvREFCNT_inc_NN (ST (i)));
2786 }
2787
2788 av_push (state, data_sv);
2789
2790 api_ready (aTHX_ coro);
2791 SvREFCNT_dec (coro);
2792 SvREFCNT_dec ((AV *)state);
2793}
2794
2795static int
2796slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2797{
2798 AV *state = (AV *)frame->data;
2799
2800 /* if we are about to throw, return early */
2801 /* this does not cancel the aio request, but at least */
2802 /* it quickly returns */
2803 if (CORO_THROW)
2804 return 0;
2805
2806 /* one element that is an RV? repeat! */
2807 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2808 return 1;
2809
2810 /* restore status */
2811 {
2812 SV *data_sv = av_pop (state);
2813 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2814
2815 errno = data->errorno;
2816 PL_laststype = data->laststype;
2817 PL_laststatval = data->laststatval;
2818 PL_statcache = data->statcache;
2819
2820 SvREFCNT_dec (data_sv);
2821 }
2822
2823 /* push result values */
2824 {
2825 dSP;
2826 int i;
2827
2828 EXTEND (SP, AvFILLp (state) + 1);
2829 for (i = 0; i <= AvFILLp (state); ++i)
2830 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2831
2832 PUTBACK;
2833 }
2834
2835 return 0;
2836}
2837
2838static void
2839slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2840{
2841 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2842 SV *coro_hv = SvRV (coro_current);
2843 struct coro *coro = SvSTATE_hv (coro_hv);
2844
2845 /* put our coroutine id on the state arg */
2846 av_push (state, SvREFCNT_inc_NN (coro_hv));
2847
2848 /* first see whether we have a non-zero priority and set it as AIO prio */
2849 if (coro->prio)
2850 {
2851 dSP;
2852
2853 static SV *prio_cv;
2854 static SV *prio_sv;
2855
2856 if (expect_false (!prio_cv))
2857 {
2858 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2859 prio_sv = newSViv (0);
2860 }
2861
2862 PUSHMARK (SP);
2863 sv_setiv (prio_sv, coro->prio);
2864 XPUSHs (prio_sv);
2865
2866 PUTBACK;
2867 call_sv (prio_cv, G_VOID | G_DISCARD);
2868 }
2869
2870 /* now call the original request */
2871 {
2872 dSP;
2873 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2874 int i;
2875
2876 PUSHMARK (SP);
2877
2878 /* first push all args to the stack */
2879 EXTEND (SP, items + 1);
2880
2881 for (i = 0; i < items; ++i)
2882 PUSHs (arg [i]);
2883
2884 /* now push the callback closure */
2885 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2886
2887 /* now call the AIO function - we assume our request is uncancelable */
2888 PUTBACK;
2889 call_sv ((SV *)req, G_VOID | G_DISCARD);
2890 }
2891
2892 /* now that the requets is going, we loop toll we have a result */
2893 frame->data = (void *)state;
2894 frame->prepare = prepare_schedule;
2895 frame->check = slf_check_aio_req;
2896}
2897
2898static void
2899coro_aio_req_xs (pTHX_ CV *cv)
2900{
2901 dXSARGS;
2902
2903 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2904
2905 XSRETURN_EMPTY;
2906}
2907
2908/*****************************************************************************/
2909
2910#if CORO_CLONE
2911# include "clone.c"
2912#endif
2913
990MODULE = Coro::State PACKAGE = Coro::State 2914MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 2915
992PROTOTYPES: DISABLE 2916PROTOTYPES: DISABLE
993 2917
994BOOT: 2918BOOT:
995{ 2919{
996#ifdef USE_ITHREADS 2920#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 2921# if CORO_PTHREAD
2922 coro_thx = PERL_GET_CONTEXT;
2923# endif
998#endif 2924#endif
999 BOOT_PAGESIZE; 2925 BOOT_PAGESIZE;
1000 2926
2927 cctx_current = cctx_new_empty ();
2928
2929 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2930 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2931
2932 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2933 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2934 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2935
2936 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2937 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2938 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2939
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2940 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 2941
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2942 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2943 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2944 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2945 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 2946
1007 main_mainstack = PL_mainstack; 2947 main_mainstack = PL_mainstack;
2948 main_top_env = PL_top_env;
1008 2949
2950 while (main_top_env->je_prev)
2951 main_top_env = main_top_env->je_prev;
2952
2953 {
2954 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2955
2956 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2957 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2958
2959 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2960 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2961 }
2962
1009 coroapi.ver = CORO_API_VERSION; 2963 coroapi.ver = CORO_API_VERSION;
2964 coroapi.rev = CORO_API_REVISION;
2965
1010 coroapi.transfer = api_transfer; 2966 coroapi.transfer = api_transfer;
1011 2967
1012 Newz (0, main_stack, 1, coro_stack); 2968 coroapi.sv_state = SvSTATE_;
1013 main_stack->idle_sp = (void *)-1; 2969 coroapi.execute_slf = api_execute_slf;
2970 coroapi.prepare_nop = prepare_nop;
2971 coroapi.prepare_schedule = prepare_schedule;
2972 coroapi.prepare_cede = prepare_cede;
2973 coroapi.prepare_cede_notself = prepare_cede_notself;
1014 2974
2975 {
2976 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2977
2978 if (!svp) croak ("Time::HiRes is required");
2979 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2980
2981 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2982
2983 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2984 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
2985 }
2986
1015 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2987 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1016} 2988}
1017 2989
1018SV * 2990SV *
1019new (char *klass, ...) 2991new (char *klass, ...)
2992 ALIAS:
2993 Coro::new = 1
1020 CODE: 2994 CODE:
1021{ 2995{
1022 struct coro *coro; 2996 struct coro *coro;
2997 MAGIC *mg;
1023 HV *hv; 2998 HV *hv;
2999 SV *cb;
1024 int i; 3000 int i;
1025 3001
3002 if (items > 1)
3003 {
3004 cb = s_get_cv_croak (ST (1));
3005
3006 if (!ix)
3007 {
3008 if (CvISXSUB (cb))
3009 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3010
3011 if (!CvROOT (cb))
3012 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3013 }
3014 }
3015
1026 Newz (0, coro, 1, struct coro); 3016 Newz (0, coro, 1, struct coro);
1027 coro->args = newAV (); 3017 coro->args = newAV ();
3018 coro->flags = CF_NEW;
1028 3019
3020 if (coro_first) coro_first->prev = coro;
3021 coro->next = coro_first;
3022 coro_first = coro;
3023
1029 hv = newHV (); 3024 coro->hv = hv = newHV ();
1030 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3025 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3026 mg->mg_flags |= MGf_DUP;
1031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3027 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032 3028
3029 if (items > 1)
3030 {
3031 av_extend (coro->args, items - 1 + ix - 1);
3032
3033 if (ix)
3034 {
3035 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3036 cb = (SV *)cv_coro_run;
3037 }
3038
3039 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3040
1033 for (i = 1; i < items; i++) 3041 for (i = 2; i < items; i++)
1034 av_push (coro->args, newSVsv (ST (i))); 3042 av_push (coro->args, newSVsv (ST (i)));
1035 3043 }
1036 coro->stack = main_stack;
1037 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1038 /*coro->stack = 0;*/
1039} 3044}
1040 OUTPUT: 3045 OUTPUT:
1041 RETVAL 3046 RETVAL
1042 3047
1043void 3048void
1044_set_stacklevel (...) 3049transfer (...)
1045 ALIAS: 3050 PROTOTYPE: $$
1046 Coro::State::transfer = 1 3051 CODE:
1047 Coro::schedule = 2 3052 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1048 Coro::cede = 3
1049 Coro::Cont::yield = 4
1050 CODE:
1051{
1052 struct transfer_args ta;
1053 3053
1054 switch (ix) 3054bool
1055 { 3055_destroy (SV *coro_sv)
1056 case 0: 3056 CODE:
1057 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3057 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1058 ta.next = 0; 3058 OUTPUT:
1059 ta.flags = TRANSFER_SET_STACKLEVEL; 3059 RETVAL
1060 break;
1061
1062 case 1:
1063 if (items != 3)
1064 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1065
1066 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1067 break;
1068
1069 case 2:
1070 prepare_schedule (&ta);
1071 break;
1072
1073 case 3:
1074 prepare_cede (&ta);
1075 break;
1076
1077 case 4:
1078 {
1079 SV *yieldstack;
1080 SV *sv;
1081 AV *defav = GvAV (PL_defgv);
1082
1083 yieldstack = *hv_fetch (
1084 (HV *)SvRV (GvSV (coro_current)),
1085 "yieldstack", sizeof ("yieldstack") - 1,
1086 0
1087 );
1088
1089 /* set up @_ -- ugly */
1090 av_clear (defav);
1091 av_fill (defav, items - 1);
1092 while (items--)
1093 av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095 sv = av_pop ((AV *)SvRV (yieldstack));
1096 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098 ta.flags = 0;
1099 SvREFCNT_dec (sv);
1100 }
1101 break;
1102
1103 }
1104
1105 TRANSFER (ta);
1106}
1107 3060
1108void 3061void
1109_clone_state_from (SV *dst, SV *src)
1110 CODE:
1111{
1112 struct coro *coro_src = SvSTATE (src);
1113
1114 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116 ++coro_src->refcnt;
1117 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118}
1119
1120void
1121_nonlocal_goto (IV nextop)
1122 CODE:
1123 /* uuh, somebody will kill me again for this */
1124 PL_op->op_next = INT2PTR (OP *, nextop);
1125
1126void
1127_exit (code) 3062_exit (int code)
1128 int code
1129 PROTOTYPE: $ 3063 PROTOTYPE: $
1130 CODE: 3064 CODE:
1131 _exit (code); 3065 _exit (code);
1132 3066
3067SV *
3068clone (Coro::State coro)
3069 CODE:
3070{
3071#if CORO_CLONE
3072 struct coro *ncoro = coro_clone (aTHX_ coro);
3073 MAGIC *mg;
3074 /* TODO: too much duplication */
3075 ncoro->hv = newHV ();
3076 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3077 mg->mg_flags |= MGf_DUP;
3078 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3079#else
3080 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3081#endif
3082}
3083 OUTPUT:
3084 RETVAL
3085
3086int
3087cctx_stacksize (int new_stacksize = 0)
3088 PROTOTYPE: ;$
3089 CODE:
3090 RETVAL = cctx_stacksize;
3091 if (new_stacksize)
3092 {
3093 cctx_stacksize = new_stacksize;
3094 ++cctx_gen;
3095 }
3096 OUTPUT:
3097 RETVAL
3098
3099int
3100cctx_max_idle (int max_idle = 0)
3101 PROTOTYPE: ;$
3102 CODE:
3103 RETVAL = cctx_max_idle;
3104 if (max_idle > 1)
3105 cctx_max_idle = max_idle;
3106 OUTPUT:
3107 RETVAL
3108
3109int
3110cctx_count ()
3111 PROTOTYPE:
3112 CODE:
3113 RETVAL = cctx_count;
3114 OUTPUT:
3115 RETVAL
3116
3117int
3118cctx_idle ()
3119 PROTOTYPE:
3120 CODE:
3121 RETVAL = cctx_idle;
3122 OUTPUT:
3123 RETVAL
3124
3125void
3126list ()
3127 PROTOTYPE:
3128 PPCODE:
3129{
3130 struct coro *coro;
3131 for (coro = coro_first; coro; coro = coro->next)
3132 if (coro->hv)
3133 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3134}
3135
3136void
3137call (Coro::State coro, SV *coderef)
3138 ALIAS:
3139 eval = 1
3140 CODE:
3141{
3142 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3143 {
3144 struct coro *current = SvSTATE_current;
3145
3146 if (current != coro)
3147 {
3148 PUTBACK;
3149 save_perl (aTHX_ current);
3150 load_perl (aTHX_ coro);
3151 SPAGAIN;
3152 }
3153
3154 PUSHSTACK;
3155
3156 PUSHMARK (SP);
3157 PUTBACK;
3158
3159 if (ix)
3160 eval_sv (coderef, 0);
3161 else
3162 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3163
3164 POPSTACK;
3165 SPAGAIN;
3166
3167 if (current != coro)
3168 {
3169 PUTBACK;
3170 save_perl (aTHX_ coro);
3171 load_perl (aTHX_ current);
3172 SPAGAIN;
3173 }
3174 }
3175}
3176
3177SV *
3178is_ready (Coro::State coro)
3179 PROTOTYPE: $
3180 ALIAS:
3181 is_ready = CF_READY
3182 is_running = CF_RUNNING
3183 is_new = CF_NEW
3184 is_destroyed = CF_DESTROYED
3185 is_suspended = CF_SUSPENDED
3186 CODE:
3187 RETVAL = boolSV (coro->flags & ix);
3188 OUTPUT:
3189 RETVAL
3190
3191void
3192throw (Coro::State self, SV *throw = &PL_sv_undef)
3193 PROTOTYPE: $;$
3194 CODE:
3195{
3196 struct coro *current = SvSTATE_current;
3197 SV **throwp = self == current ? &CORO_THROW : &self->except;
3198 SvREFCNT_dec (*throwp);
3199 SvGETMAGIC (throw);
3200 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3201}
3202
3203void
3204api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3205 PROTOTYPE: $;$
3206 C_ARGS: aTHX_ coro, flags
3207
3208SV *
3209has_cctx (Coro::State coro)
3210 PROTOTYPE: $
3211 CODE:
3212 /* maybe manage the running flag differently */
3213 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3214 OUTPUT:
3215 RETVAL
3216
3217int
3218is_traced (Coro::State coro)
3219 PROTOTYPE: $
3220 CODE:
3221 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3222 OUTPUT:
3223 RETVAL
3224
3225UV
3226rss (Coro::State coro)
3227 PROTOTYPE: $
3228 ALIAS:
3229 usecount = 1
3230 CODE:
3231 switch (ix)
3232 {
3233 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3234 case 1: RETVAL = coro->usecount; break;
3235 }
3236 OUTPUT:
3237 RETVAL
3238
3239void
3240force_cctx ()
3241 PROTOTYPE:
3242 CODE:
3243 cctx_current->idle_sp = 0;
3244
3245void
3246swap_defsv (Coro::State self)
3247 PROTOTYPE: $
3248 ALIAS:
3249 swap_defav = 1
3250 CODE:
3251 if (!self->slot)
3252 croak ("cannot swap state with coroutine that has no saved state,");
3253 else
3254 {
3255 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3256 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3257
3258 SV *tmp = *src; *src = *dst; *dst = tmp;
3259 }
3260
3261void
3262cancel (Coro::State self)
3263 CODE:
3264 coro_state_destroy (aTHX_ self);
3265 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3266
3267
3268SV *
3269enable_times (int enabled = enable_times)
3270 CODE:
3271{
3272 RETVAL = boolSV (enable_times);
3273
3274 if (enabled != enable_times)
3275 {
3276 enable_times = enabled;
3277
3278 coro_times_update ();
3279 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3280 }
3281}
3282 OUTPUT:
3283 RETVAL
3284
3285void
3286times (Coro::State self)
3287 PPCODE:
3288{
3289 struct coro *current = SvSTATE (coro_current);
3290
3291 if (expect_false (current == self))
3292 {
3293 coro_times_update ();
3294 coro_times_add (SvSTATE (coro_current));
3295 }
3296
3297 EXTEND (SP, 2);
3298 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3299 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3300
3301 if (expect_false (current == self))
3302 coro_times_sub (SvSTATE (coro_current));
3303}
3304
1133MODULE = Coro::State PACKAGE = Coro 3305MODULE = Coro::State PACKAGE = Coro
1134 3306
1135BOOT: 3307BOOT:
1136{ 3308{
1137 int i; 3309 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3310 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3311 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3312 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3313 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3314 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3315 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3316 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3317 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1138 3318
3319 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3320 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3321 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3322 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3323
1139 coro_stash = gv_stashpv ("Coro", TRUE); 3324 coro_stash = gv_stashpv ("Coro", TRUE);
1140 3325
1141 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3326 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1142 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3327 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1143 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3328 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1144 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3329 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1145 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3330 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1146 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3331 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1147
1148 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152 coro_ready[i] = newAV ();
1153 3332
1154 { 3333 {
1155 SV *sv = perl_get_sv("Coro::API", 1); 3334 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1156 3335
1157 coroapi.schedule = api_schedule; 3336 coroapi.schedule = api_schedule;
3337 coroapi.schedule_to = api_schedule_to;
1158 coroapi.cede = api_cede; 3338 coroapi.cede = api_cede;
3339 coroapi.cede_notself = api_cede_notself;
1159 coroapi.ready = api_ready; 3340 coroapi.ready = api_ready;
3341 coroapi.is_ready = api_is_ready;
1160 coroapi.nready = &coro_nready; 3342 coroapi.nready = coro_nready;
1161 coroapi.current = coro_current; 3343 coroapi.current = coro_current;
1162 3344
1163 GCoroAPI = &coroapi; 3345 /*GCoroAPI = &coroapi;*/
1164 sv_setiv (sv, (IV)&coroapi); 3346 sv_setiv (sv, (IV)&coroapi);
1165 SvREADONLY_on (sv); 3347 SvREADONLY_on (sv);
1166 } 3348 }
1167} 3349}
1168 3350
3351void
3352terminate (...)
3353 CODE:
3354 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3355
3356void
3357schedule (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3360
3361void
3362schedule_to (...)
3363 CODE:
3364 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3365
3366void
3367cede_to (...)
3368 CODE:
3369 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3370
3371void
3372cede (...)
3373 CODE:
3374 CORO_EXECUTE_SLF_XS (slf_init_cede);
3375
3376void
3377cede_notself (...)
3378 CODE:
3379 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3380
3381void
3382_set_current (SV *current)
3383 PROTOTYPE: $
3384 CODE:
3385 SvREFCNT_dec (SvRV (coro_current));
3386 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3387
3388void
3389_set_readyhook (SV *hook)
3390 PROTOTYPE: $
3391 CODE:
3392 SvREFCNT_dec (coro_readyhook);
3393 SvGETMAGIC (hook);
3394 if (SvOK (hook))
3395 {
3396 coro_readyhook = newSVsv (hook);
3397 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3398 CORO_READYHOOK ();
3399 }
3400 else
3401 {
3402 coro_readyhook = 0;
3403 CORO_READYHOOK = 0;
3404 }
3405
1169int 3406int
1170prio (Coro::State coro, int newprio = 0) 3407prio (Coro::State coro, int newprio = 0)
3408 PROTOTYPE: $;$
1171 ALIAS: 3409 ALIAS:
1172 nice = 1 3410 nice = 1
1173 CODE: 3411 CODE:
1174{ 3412{
1175 RETVAL = coro->prio; 3413 RETVAL = coro->prio;
1176 3414
1177 if (items > 1) 3415 if (items > 1)
1178 { 3416 {
1179 if (ix) 3417 if (ix)
1180 newprio += coro->prio; 3418 newprio = coro->prio - newprio;
1181 3419
1182 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3420 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1183 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3421 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1184 3422
1185 coro->prio = newprio; 3423 coro->prio = newprio;
1186 } 3424 }
1187} 3425}
3426 OUTPUT:
3427 RETVAL
1188 3428
1189void 3429SV *
1190ready (SV *self) 3430ready (SV *self)
1191 PROTOTYPE: $ 3431 PROTOTYPE: $
1192 CODE: 3432 CODE:
1193 api_ready (self); 3433 RETVAL = boolSV (api_ready (aTHX_ self));
3434 OUTPUT:
3435 RETVAL
1194 3436
1195int 3437int
1196nready (...) 3438nready (...)
1197 PROTOTYPE: 3439 PROTOTYPE:
1198 CODE: 3440 CODE:
1199 RETVAL = coro_nready; 3441 RETVAL = coro_nready;
1200 OUTPUT: 3442 OUTPUT:
1201 RETVAL 3443 RETVAL
1202 3444
1203MODULE = Coro::State PACKAGE = Coro::AIO 3445void
3446suspend (Coro::State self)
3447 PROTOTYPE: $
3448 CODE:
3449 self->flags |= CF_SUSPENDED;
3450
3451void
3452resume (Coro::State self)
3453 PROTOTYPE: $
3454 CODE:
3455 self->flags &= ~CF_SUSPENDED;
3456
3457void
3458_pool_handler (...)
3459 CODE:
3460 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3461
3462void
3463async_pool (SV *cv, ...)
3464 PROTOTYPE: &@
3465 PPCODE:
3466{
3467 HV *hv = (HV *)av_pop (av_async_pool);
3468 AV *av = newAV ();
3469 SV *cb = ST (0);
3470 int i;
3471
3472 av_extend (av, items - 2);
3473 for (i = 1; i < items; ++i)
3474 av_push (av, SvREFCNT_inc_NN (ST (i)));
3475
3476 if ((SV *)hv == &PL_sv_undef)
3477 {
3478 PUSHMARK (SP);
3479 EXTEND (SP, 2);
3480 PUSHs (sv_Coro);
3481 PUSHs ((SV *)cv_pool_handler);
3482 PUTBACK;
3483 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3484 SPAGAIN;
3485
3486 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3487 }
3488
3489 {
3490 struct coro *coro = SvSTATE_hv (hv);
3491
3492 assert (!coro->invoke_cb);
3493 assert (!coro->invoke_av);
3494 coro->invoke_cb = SvREFCNT_inc (cb);
3495 coro->invoke_av = av;
3496 }
3497
3498 api_ready (aTHX_ (SV *)hv);
3499
3500 if (GIMME_V != G_VOID)
3501 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3502 else
3503 SvREFCNT_dec (hv);
3504}
1204 3505
1205SV * 3506SV *
1206_get_state () 3507rouse_cb ()
3508 PROTOTYPE:
1207 CODE: 3509 CODE:
1208{ 3510 RETVAL = coro_new_rouse_cb (aTHX);
1209 struct {
1210 int errorno;
1211 int laststype;
1212 int laststatval;
1213 Stat_t statcache;
1214 } data;
1215
1216 data.errorno = errno;
1217 data.laststype = PL_laststype;
1218 data.laststatval = PL_laststatval;
1219 data.statcache = PL_statcache;
1220
1221 RETVAL = newSVpvn ((char *)&data, sizeof data);
1222}
1223 OUTPUT: 3511 OUTPUT:
1224 RETVAL 3512 RETVAL
1225 3513
1226void 3514void
1227_set_state (char *data_) 3515rouse_wait (...)
3516 PROTOTYPE: ;$
3517 PPCODE:
3518 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3519
3520void
3521on_enter (SV *block)
3522 ALIAS:
3523 on_leave = 1
1228 PROTOTYPE: $ 3524 PROTOTYPE: &
1229 CODE: 3525 CODE:
1230{ 3526{
1231 struct { 3527 struct coro *coro = SvSTATE_current;
3528 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3529
3530 block = s_get_cv_croak (block);
3531
3532 if (!*avp)
3533 *avp = newAV ();
3534
3535 av_push (*avp, SvREFCNT_inc (block));
3536
3537 if (!ix)
3538 on_enterleave_call (aTHX_ block);
3539
3540 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3541 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3542 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3543}
3544
3545
3546MODULE = Coro::State PACKAGE = PerlIO::cede
3547
3548BOOT:
3549 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3550
3551
3552MODULE = Coro::State PACKAGE = Coro::Semaphore
3553
3554SV *
3555new (SV *klass, SV *count = 0)
3556 CODE:
3557{
3558 int semcnt = 1;
3559
3560 if (count)
3561 {
3562 SvGETMAGIC (count);
3563
3564 if (SvOK (count))
3565 semcnt = SvIV (count);
3566 }
3567
3568 RETVAL = sv_bless (
3569 coro_waitarray_new (aTHX_ semcnt),
3570 GvSTASH (CvGV (cv))
3571 );
3572}
3573 OUTPUT:
3574 RETVAL
3575
3576# helper for Coro::Channel and others
3577SV *
3578_alloc (int count)
3579 CODE:
3580 RETVAL = coro_waitarray_new (aTHX_ count);
3581 OUTPUT:
3582 RETVAL
3583
3584SV *
3585count (SV *self)
3586 CODE:
3587 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3588 OUTPUT:
3589 RETVAL
3590
3591void
3592up (SV *self, int adjust = 1)
3593 ALIAS:
3594 adjust = 1
3595 CODE:
3596 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3597
3598void
3599down (...)
3600 CODE:
3601 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3602
3603void
3604wait (...)
3605 CODE:
3606 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3607
3608void
3609try (SV *self)
3610 PPCODE:
3611{
3612 AV *av = (AV *)SvRV (self);
3613 SV *count_sv = AvARRAY (av)[0];
3614 IV count = SvIVX (count_sv);
3615
3616 if (count > 0)
3617 {
3618 --count;
3619 SvIVX (count_sv) = count;
3620 XSRETURN_YES;
3621 }
3622 else
3623 XSRETURN_NO;
3624}
3625
3626void
3627waiters (SV *self)
3628 PPCODE:
3629{
3630 AV *av = (AV *)SvRV (self);
3631 int wcount = AvFILLp (av) + 1 - 1;
3632
3633 if (GIMME_V == G_SCALAR)
3634 XPUSHs (sv_2mortal (newSViv (wcount)));
3635 else
3636 {
1232 int errorno; 3637 int i;
1233 int laststype; 3638 EXTEND (SP, wcount);
1234 int laststatval; 3639 for (i = 1; i <= wcount; ++i)
1235 Stat_t statcache; 3640 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1236 } *data = (void *)data_; 3641 }
1237
1238 errno = data->errorno;
1239 PL_laststype = data->laststype;
1240 PL_laststatval = data->laststatval;
1241 PL_statcache = data->statcache;
1242} 3642}
3643
3644MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3645
3646void
3647_may_delete (SV *sem, int count, int extra_refs)
3648 PPCODE:
3649{
3650 AV *av = (AV *)SvRV (sem);
3651
3652 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3653 && AvFILLp (av) == 0 /* no waiters, just count */
3654 && SvIV (AvARRAY (av)[0]) == count)
3655 XSRETURN_YES;
3656
3657 XSRETURN_NO;
3658}
3659
3660MODULE = Coro::State PACKAGE = Coro::Signal
3661
3662SV *
3663new (SV *klass)
3664 CODE:
3665 RETVAL = sv_bless (
3666 coro_waitarray_new (aTHX_ 0),
3667 GvSTASH (CvGV (cv))
3668 );
3669 OUTPUT:
3670 RETVAL
3671
3672void
3673wait (...)
3674 CODE:
3675 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3676
3677void
3678broadcast (SV *self)
3679 CODE:
3680{
3681 AV *av = (AV *)SvRV (self);
3682 coro_signal_wake (aTHX_ av, AvFILLp (av));
3683}
3684
3685void
3686send (SV *self)
3687 CODE:
3688{
3689 AV *av = (AV *)SvRV (self);
3690
3691 if (AvFILLp (av))
3692 coro_signal_wake (aTHX_ av, 1);
3693 else
3694 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3695}
3696
3697IV
3698awaited (SV *self)
3699 CODE:
3700 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3701 OUTPUT:
3702 RETVAL
3703
3704
3705MODULE = Coro::State PACKAGE = Coro::AnyEvent
3706
3707BOOT:
3708 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3709
3710void
3711_schedule (...)
3712 CODE:
3713{
3714 static int incede;
3715
3716 api_cede_notself (aTHX);
3717
3718 ++incede;
3719 while (coro_nready >= incede && api_cede (aTHX))
3720 ;
3721
3722 sv_setsv (sv_activity, &PL_sv_undef);
3723 if (coro_nready >= incede)
3724 {
3725 PUSHMARK (SP);
3726 PUTBACK;
3727 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3728 }
3729
3730 --incede;
3731}
3732
3733
3734MODULE = Coro::State PACKAGE = Coro::AIO
3735
3736void
3737_register (char *target, char *proto, SV *req)
3738 CODE:
3739{
3740 SV *req_cv = s_get_cv_croak (req);
3741 /* newXSproto doesn't return the CV on 5.8 */
3742 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3743 sv_setpv ((SV *)slf_cv, proto);
3744 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3745}
3746
3747MODULE = Coro::State PACKAGE = Coro::Select
3748
3749void
3750patch_pp_sselect ()
3751 CODE:
3752 if (!coro_old_pp_sselect)
3753 {
3754 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3755 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3756 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3757 }
3758
3759void
3760unpatch_pp_sselect ()
3761 CODE:
3762 if (coro_old_pp_sselect)
3763 {
3764 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3765 coro_old_pp_sselect = 0;
3766 }
3767
3768

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