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Comparing Coro/Coro/State.xs (file contents):
Revision 1.98 by root, Sun Nov 26 21:25:53 2006 UTC vs.
Revision 1.367 by root, Mon Aug 3 09:19:57 2009 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "schmorp.h"
8
9#if PERL_VERSION < 6
10# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr
12# endif
13# ifndef call_sv
14# define call_sv perl_call_sv
15# endif
16# ifndef get_sv
17# define get_sv perl_get_sv
18# endif
19# ifndef get_cv
20# define get_cv perl_get_cv
21# endif
22# ifndef IS_PADGV
23# define IS_PADGV(v) 0
24# endif
25# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0
27# endif
28#endif
29 12
30#include <stdio.h> 13#include <stdio.h>
31#include <errno.h> 14#include <errno.h>
15#include <assert.h>
32 16
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
34# undef STACKGUARD 18# undef setjmp
35#endif 19# undef longjmp
36 20# undef _exit
37#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
38# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
39#endif 24#endif
40 25
41#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
42# include <unistd.h> 27# include <unistd.h>
43# include <sys/mman.h> 28# include <sys/mman.h>
… …
52# ifndef PAGESIZE 37# ifndef PAGESIZE
53# define PAGESIZE pagesize 38# define PAGESIZE pagesize
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize; 40static long pagesize;
56# else 41# else
57# 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;
58# endif 102# endif
59#endif 103#endif
60 104
61/* The next macro should declare a variable stacklevel that contains and approximation 105#ifdef __linux
62 * to the current C stack pointer. Its property is that it changes with each call 106# include <time.h> /* for timespec */
63 * and should be unique. */ 107# include <syscall.h> /* for SYS_* */
64#define dSTACKLEVEL int stacklevel 108# ifdef SYS_clock_gettime
65#define STACKLEVEL ((void *)&stacklevel) 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
66 110# define CORO_CLOCK_MONOTONIC 1
67#define IN_DESTRUCT (PL_main_cv == Nullcv) 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
68 112# endif
69#include "CoroAPI.h"
70
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72
73#ifdef USE_ITHREADS
74static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else
78# define LOCK (void)0
79# define UNLOCK (void)0
80#endif 113#endif
81 114
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;
82static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
83static 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;
84static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
85static 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};
86 169
87/* this is a structure representing a c-level coroutine */ 170/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 171typedef struct coro_cctx
172{
89 struct coro_stack *next; 173 struct coro_cctx *next;
90 174
91 /* the stack */ 175 /* the stack */
92 void *sptr; 176 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 177 size_t ssize;
94 178
95 /* cpu state */ 179 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 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 */
97 JMPENV *top_env; 182 JMPENV *top_env;
98 coro_context cctx; 183 coro_context cctx;
99} coro_stack; 184
185 U32 gen;
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))
100 218
101/* this is a structure representing a perl-level coroutine */ 219/* this is a structure representing a perl-level coroutine */
102struct coro { 220struct coro {
103 /* the c coroutine allocated to this perl coroutine, if any */ 221 /* the C coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 222 coro_cctx *cctx;
105 223
106 /* data associated with this coroutine (initial args) */ 224 /* ready queue */
107 AV *args; 225 struct coro *next_ready;
108 int refcnt;
109 226
110 /* optionally saved, might be zero */ 227 /* state data */
111 AV *defav; 228 struct CoroSLF slf_frame; /* saved slf frame */
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 229 AV *mainstack;
123 SV **stack_sp; 230 perl_slots *slot; /* basically the saved sp */
124 OP *op; 231
125 SV **curpad; 232 CV *startcv; /* the CV to execute */
126 AV *comppad; 233 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 234 int refcnt; /* coroutines are refcounted, yes */
128 SV **stack_base; 235 int flags; /* CF_ flags */
129 SV **stack_max; 236 HV *hv; /* the perl hash associated with this coro, if any */
130 SV **tmps_stack; 237 void (*on_destroy)(pTHX_ struct coro *coro);
131 I32 tmps_floor; 238
132 I32 tmps_ix; 239 /* statistics */
133 I32 tmps_max; 240 int usecount; /* number of transfers to this coro */
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 241
149 /* coro process data */ 242 /* coro process data */
150 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;
151}; 261};
152 262
153typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
155 265
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
156static 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 *
157coro_clone_padlist (CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
158{ 441{
159 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
161 444
162 newpadlist = newAV (); 445 newpadlist = newAV ();
163 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 447#if PERL_VERSION_ATLEAST (5,10,0)
448 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
449#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 451#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 453 --AvFILLp (padlist);
171 454
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
173 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
174 457
175 return newpadlist; 458 return newpadlist;
176} 459}
177 460
178static void 461static void
179free_padlist (AV *padlist) 462free_padlist (pTHX_ AV *padlist)
180{ 463{
181 /* may be during global destruction */ 464 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
183 { 466 {
184 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
185 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
186 { 470 {
187 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
188 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
189 { 473 I32 j = AvFILLp (av);
190 SV *sv; 474
191 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
192 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
193
194 SvREFCNT_dec (*svp);
195 }
196 } 480 }
197 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
198 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
199 } 486 }
200} 487}
201 488
202static int 489static int
203coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
204{ 491{
205 AV *padlist; 492 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
207 494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return 0;
498
208 /* casting is fun. */ 499 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (padlist); 501 free_padlist (aTHX_ padlist);
211 502
212 SvREFCNT_dec (av); 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 504
214 return 0; 505 return 0;
215} 506}
216 507
217#define PERL_MAGIC_coro PERL_MAGIC_ext 508static MGVTBL coro_cv_vtbl = {
218 509 0, 0, 0, 0,
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 510 coro_cv_free
511};
220 512
221/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
222static void 514static void
223get_padlist (CV *cv) 515get_padlist (pTHX_ CV *cv)
224{ 516{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 517 MAGIC *mg = CORO_MAGIC_cv (cv);
518 AV *av;
226 519
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 522 else
230 { 523 {
231#if 0 524#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
237#else 531#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
239#endif 533#endif
240 } 534 }
241} 535}
242 536
243static void 537static void
244put_padlist (CV *cv) 538put_padlist (pTHX_ CV *cv)
245{ 539{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 540 MAGIC *mg = CORO_MAGIC_cv (cv);
541 AV *av;
247 542
248 if (!mg) 543 if (expect_false (!mg))
249 { 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 545
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 546 av = (AV *)mg->mg_obj;
257}
258 547
259#define SB do { 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 549 av_extend (av, AvFILLp (av) + 1);
261 550
262#define LOAD(state) load_state((state)); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state((state),(flags)); 552}
264 553
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 554/** load & save, init *******************************************************/
266 555
267static void 556static void
557on_enterleave_call (pTHX_ SV *cb);
558
559static void
268load_state(Coro__State c) 560load_perl (pTHX_ Coro__State c)
269{ 561{
270 PL_dowarn = c->dowarn; 562 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 563 c->slot = 0;
272 564
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 566
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 567 GvSV (PL_defgv) = slot->defsv;
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 568 GvAV (PL_defgv) = slot->defav;
306 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
307 576
308 { 577 {
309 dSP; 578 dSP;
579
310 CV *cv; 580 CV *cv;
311 581
312 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
314 { 584 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 586 CvDEPTH (cv) = PTR2IV (POPs);
321 } 587 CvPADLIST (cv) = (AV *)POPs;
322
323 ++CvDEPTH(cv);
324 } 588 }
325 589
326 PUTBACK; 590 PUTBACK;
327 } 591 }
328}
329 592
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
330static void 613static void
331save_state(Coro__State c, int flags) 614save_perl (pTHX_ Coro__State c)
332{ 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
333 { 635 {
334 dSP; 636 dSP;
335 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
337 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
339 /* 641 /*
340 * 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
341 * (and reinitialize) all cv's in the whole callchain :( 643 * (and reinitialize) all cv's in the whole callchain :(
342 */ 644 */
343 645
344 PUSHs (Nullsv); 646 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 647 /* this loop was inspired by pp_caller */
346 for (;;) 648 for (;;)
347 { 649 {
348 while (cxix >= 0) 650 while (expect_true (cxix >= 0))
349 { 651 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
351 653
352 if (CxTYPE(cx) == CXt_SUB) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
353 { 655 {
354 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
657
355 if (CvDEPTH(cv)) 658 if (expect_true (CvDEPTH (cv)))
356 { 659 {
357 EXTEND (SP, CvDEPTH(cv)*2); 660 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 661 PUSHs ((SV *)CvPADLIST (cv));
662 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 663 PUSHs ((SV *)cv);
368 664
665 CvDEPTH (cv) = 0;
369 get_padlist (cv); 666 get_padlist (aTHX_ cv);
370 } 667 }
371 } 668 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 669 }
381 670
382 if (top_si->si_type == PERLSI_MAIN) 671 if (expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 672 break;
384 673
385 top_si = top_si->si_prev; 674 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 675 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 676 cxix = top_si->si_cxix;
388 } 677 }
389 678
390 PUTBACK; 679 PUTBACK;
391 } 680 }
392 681
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 682 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 683 /* we manually unroll here, as usually 2 slots is enough */
395 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 */
396 693
397 c->dowarn = PL_dowarn;
398 c->in_eval = PL_in_eval;
399
400 c->curstackinfo = PL_curstackinfo;
401 c->curstack = PL_curstack;
402 c->mainstack = PL_mainstack; 694 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 695
404 c->op = PL_op; 696 {
405 c->curpad = PL_curpad; 697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 698
407 c->compcv = PL_compcv; 699 slot->defav = GvAV (PL_defgv);
408 c->stack_base = PL_stack_base; 700 slot->defsv = DEFSV;
409 c->stack_max = PL_stack_max; 701 slot->errsv = ERRSV;
410 c->tmps_stack = PL_tmps_stack; 702 slot->irsgv = GvSV (irsgv);
411 c->tmps_floor = PL_tmps_floor; 703 slot->hinthv = GvHV (PL_hintgv);
412 c->tmps_ix = PL_tmps_ix; 704
413 c->tmps_max = PL_tmps_max; 705 #define VAR(name,type) slot->name = PL_ ## name;
414 c->markstack = PL_markstack; 706 # include "state.h"
415 c->markstack_ptr = PL_markstack_ptr; 707 #undef VAR
416 c->markstack_max = PL_markstack_max; 708 }
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif
428 c->curpm = PL_curpm;
429 c->curcop = PL_curcop;
430} 709}
431 710
432/* 711/*
433 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 714 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 715 * not usually need a lot of stackspace.
437 */ 716 */
717#if CORO_PREFER_PERL_FUNCTIONS
718# define coro_init_stacks(thx) init_stacks ()
719#else
438static void 720static void
439coro_init_stacks () 721coro_init_stacks (pTHX)
440{ 722{
441 LOCK; 723 PL_curstackinfo = new_stackinfo(32, 8);
442
443 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
444 PL_curstackinfo->si_type = PERLSI_MAIN; 724 PL_curstackinfo->si_type = PERLSI_MAIN;
445 PL_curstack = PL_curstackinfo->si_stack; 725 PL_curstack = PL_curstackinfo->si_stack;
446 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 726 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
447 727
448 PL_stack_base = AvARRAY(PL_curstack); 728 PL_stack_base = AvARRAY(PL_curstack);
449 PL_stack_sp = PL_stack_base; 729 PL_stack_sp = PL_stack_base;
450 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 730 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
451 731
452 New(50,PL_tmps_stack,96,SV*); 732 New(50,PL_tmps_stack,32,SV*);
453 PL_tmps_floor = -1; 733 PL_tmps_floor = -1;
454 PL_tmps_ix = -1; 734 PL_tmps_ix = -1;
455 PL_tmps_max = 96; 735 PL_tmps_max = 32;
456 736
457 New(54,PL_markstack,16,I32); 737 New(54,PL_markstack,16,I32);
458 PL_markstack_ptr = PL_markstack; 738 PL_markstack_ptr = PL_markstack;
459 PL_markstack_max = PL_markstack + 16; 739 PL_markstack_max = PL_markstack + 16;
460 740
461#ifdef SET_MARK_OFFSET 741#ifdef SET_MARK_OFFSET
462 SET_MARK_OFFSET; 742 SET_MARK_OFFSET;
463#endif 743#endif
464 744
465 New(54,PL_scopestack,16,I32); 745 New(54,PL_scopestack,8,I32);
466 PL_scopestack_ix = 0; 746 PL_scopestack_ix = 0;
467 PL_scopestack_max = 16; 747 PL_scopestack_max = 8;
468 748
469 New(54,PL_savestack,96,ANY); 749 New(54,PL_savestack,24,ANY);
470 PL_savestack_ix = 0; 750 PL_savestack_ix = 0;
471 PL_savestack_max = 96; 751 PL_savestack_max = 24;
472 752
473#if PERL_VERSION < 9 753#if !PERL_VERSION_ATLEAST (5,10,0)
474 New(54,PL_retstack,8,OP*); 754 New(54,PL_retstack,4,OP*);
475 PL_retstack_ix = 0; 755 PL_retstack_ix = 0;
476 PL_retstack_max = 8; 756 PL_retstack_max = 4;
477#endif 757#endif
478
479 UNLOCK;
480} 758}
759#endif
481 760
482/* 761/*
483 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
484 */ 763 */
485static void 764static void
486destroy_stacks() 765coro_destruct_stacks (pTHX)
487{ 766{
488 if (!IN_DESTRUCT)
489 {
490 /* is this ugly, I ask? */
491 LEAVE_SCOPE (0);
492
493 /* sure it is, but more important: is it correct?? :/ */
494 FREETMPS;
495
496 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
497 }
498
499 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
500 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
501 769
502 while (PL_curstackinfo) 770 while (PL_curstackinfo)
503 { 771 {
504 PERL_SI *p = PL_curstackinfo->si_prev; 772 PERL_SI *p = PL_curstackinfo->si_prev;
505 773
506 { /*D*//*remove*/
507 dSP;
508 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
509 PUTBACK; /* possibly superfluous */
510 }
511
512 if (!IN_DESTRUCT) 774 if (!IN_DESTRUCT)
513 {
514 dounwind (-1);/*D*//*remove*/
515 SvREFCNT_dec (PL_curstackinfo->si_stack); 775 SvREFCNT_dec (PL_curstackinfo->si_stack);
516 }
517 776
518 Safefree (PL_curstackinfo->si_cxstack); 777 Safefree (PL_curstackinfo->si_cxstack);
519 Safefree (PL_curstackinfo); 778 Safefree (PL_curstackinfo);
520 PL_curstackinfo = p; 779 PL_curstackinfo = p;
521 } 780 }
522 781
523 Safefree (PL_tmps_stack); 782 Safefree (PL_tmps_stack);
524 Safefree (PL_markstack); 783 Safefree (PL_markstack);
525 Safefree (PL_scopestack); 784 Safefree (PL_scopestack);
526 Safefree (PL_savestack); 785 Safefree (PL_savestack);
527#if PERL_VERSION < 9 786#if !PERL_VERSION_ATLEAST (5,10,0)
528 Safefree (PL_retstack); 787 Safefree (PL_retstack);
529#endif 788#endif
530} 789}
531 790
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 */
532static void 843static int
533setup_coro (struct coro *coro) 844coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
845{
846 const char *s = MgPV_nolen_const (mg);
847
848 if (*s == '_')
849 {
850 SV **svp = 0;
851
852 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
853 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
854
855 if (svp)
856 {
857 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
858 return 0;
859 }
860 }
861
862 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
863}
864
865static int
866coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
867{
868 const char *s = MgPV_nolen_const (mg);
869
870 if (*s == '_')
871 {
872 SV **svp = 0;
873
874 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
875 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
876
877 if (svp)
878 {
879 SV *old = *svp;
880 *svp = 0;
881 SvREFCNT_dec (old);
882 return 0;
883 }
884 }
885
886 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
887}
888
889static int
890coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
891{
892 const char *s = MgPV_nolen_const (mg);
893
894 if (*s == '_')
895 {
896 SV **svp = 0;
897
898 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
899 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
900
901 if (svp)
902 {
903 SV *old = *svp;
904 *svp = SvOK (sv) ? newSVsv (sv) : 0;
905 SvREFCNT_dec (old);
906 return 0;
907 }
908 }
909
910 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
911}
912
913static void
914prepare_nop (pTHX_ struct coro_transfer_args *ta)
915{
916 /* kind of mega-hacky, but works */
917 ta->next = ta->prev = (struct coro *)ta;
918}
919
920static int
921slf_check_nop (pTHX_ struct CoroSLF *frame)
922{
923 return 0;
924}
925
926static int
927slf_check_repeat (pTHX_ struct CoroSLF *frame)
928{
929 return 1;
930}
931
932static UNOP coro_setup_op;
933
934static void NOINLINE /* noinline to keep it out of the transfer fast path */
935coro_setup (pTHX_ struct coro *coro)
534{ 936{
535 /* 937 /*
536 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
537 */ 939 */
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. Likewise, we cannot catch
1281 * runtime errors here, as this is just a random interpreter, not a thread.
1282 */
1283
1284 /*
1285 * If perl-run returns we assume exit() was being called or the coro
1286 * fell off the end, which seems to be the only valid (non-bug)
1287 * reason for perl_run to return. We try to exit by jumping to the
1288 * bootstrap-time "top" top_env, as we cannot restore the "main"
1289 * coroutine as Coro has no such concept.
1290 * This actually isn't valid with the pthread backend, but OSes requiring
1291 * that backend are too broken to do it in a standards-compliant way.
1292 */
1293 PL_top_env = main_top_env;
1294 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1295 }
1296}
1297
1298static coro_cctx *
1299cctx_new ()
1300{
1301 coro_cctx *cctx;
1302
1303 ++cctx_count;
1304 New (0, cctx, 1, coro_cctx);
1305
1306 cctx->gen = cctx_gen;
1307 cctx->flags = 0;
1308 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1309
1310 return cctx;
1311}
1312
1313/* create a new cctx only suitable as source */
1314static coro_cctx *
1315cctx_new_empty ()
1316{
1317 coro_cctx *cctx = cctx_new ();
1318
1319 cctx->sptr = 0;
1320 coro_create (&cctx->cctx, 0, 0, 0, 0);
1321
1322 return cctx;
1323}
1324
1325/* create a new cctx suitable as destination/running a perl interpreter */
1326static coro_cctx *
1327cctx_new_run ()
1328{
1329 coro_cctx *cctx = cctx_new ();
1330 void *stack_start;
1331 size_t stack_size;
1332
1333#if HAVE_MMAP
1334 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1335 /* mmap supposedly does allocate-on-write for us */
1336 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1337
1338 if (cctx->sptr != (void *)-1)
1339 {
1340 #if CORO_STACKGUARD
1341 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1342 #endif
1343 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1344 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1345 cctx->flags |= CC_MAPPED;
1346 }
1347 else
1348#endif
1349 {
1350 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1351 New (0, cctx->sptr, cctx_stacksize, long);
1352
1353 if (!cctx->sptr)
1354 {
1355 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1356 _exit (EXIT_FAILURE);
1357 }
1358
1359 stack_start = cctx->sptr;
1360 stack_size = cctx->ssize;
1361 }
1362
1363 #if CORO_USE_VALGRIND
1364 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1365 #endif
1366
1367 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1368
1369 return cctx;
1370}
1371
1372static void
1373cctx_destroy (coro_cctx *cctx)
1374{
1375 if (!cctx)
1376 return;
1377
1378 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1379
1380 --cctx_count;
1381 coro_destroy (&cctx->cctx);
1382
1383 /* coro_transfer creates new, empty cctx's */
1384 if (cctx->sptr)
1385 {
1386 #if CORO_USE_VALGRIND
1387 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1388 #endif
1389
1390#if HAVE_MMAP
1391 if (cctx->flags & CC_MAPPED)
1392 munmap (cctx->sptr, cctx->ssize);
1393 else
1394#endif
1395 Safefree (cctx->sptr);
1396 }
1397
1398 Safefree (cctx);
1399}
1400
1401/* wether this cctx should be destructed */
1402#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1403
1404static coro_cctx *
1405cctx_get (pTHX)
1406{
1407 while (expect_true (cctx_first))
1408 {
1409 coro_cctx *cctx = cctx_first;
1410 cctx_first = cctx->next;
1411 --cctx_idle;
1412
1413 if (expect_true (!CCTX_EXPIRED (cctx)))
1414 return cctx;
1415
1416 cctx_destroy (cctx);
1417 }
1418
1419 return cctx_new_run ();
1420}
1421
1422static void
1423cctx_put (coro_cctx *cctx)
1424{
1425 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1426
1427 /* free another cctx if overlimit */
1428 if (expect_false (cctx_idle >= cctx_max_idle))
1429 {
1430 coro_cctx *first = cctx_first;
1431 cctx_first = first->next;
1432 --cctx_idle;
1433
1434 cctx_destroy (first);
1435 }
1436
1437 ++cctx_idle;
1438 cctx->next = cctx_first;
1439 cctx_first = cctx;
1440}
1441
1442/** coroutine switching *****************************************************/
1443
1444static void
1445transfer_check (pTHX_ struct coro *prev, struct coro *next)
1446{
1447 /* TODO: throwing up here is considered harmful */
1448
1449 if (expect_true (prev != next))
1450 {
1451 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1452 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1453
1454 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1455 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1456
1457#if !PERL_VERSION_ATLEAST (5,10,0)
1458 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1459 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1460#endif
1461 }
1462}
1463
1464/* always use the TRANSFER macro */
1465static void NOINLINE /* noinline so we have a fixed stackframe */
1466transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1467{
1468 dSTACKLEVEL;
1469
1470 /* sometimes transfer is only called to set idle_sp */
1471 if (expect_false (!prev))
1472 {
1473 cctx_current->idle_sp = STACKLEVEL;
1474 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1475 }
1476 else if (expect_true (prev != next))
1477 {
1478 coro_cctx *cctx_prev;
1479
1480 if (expect_false (prev->flags & CF_NEW))
1481 {
1482 /* create a new empty/source context */
1483 prev->flags &= ~CF_NEW;
1484 prev->flags |= CF_RUNNING;
1485 }
1486
1487 prev->flags &= ~CF_RUNNING;
1488 next->flags |= CF_RUNNING;
1489
1490 /* first get rid of the old state */
1491 save_perl (aTHX_ prev);
1492
1493 if (expect_false (next->flags & CF_NEW))
1494 {
1495 /* need to start coroutine */
1496 next->flags &= ~CF_NEW;
1497 /* setup coroutine call */
1498 coro_setup (aTHX_ next);
1499 }
1500 else
1501 load_perl (aTHX_ next);
1502
1503 /* possibly untie and reuse the cctx */
1504 if (expect_true (
1505 cctx_current->idle_sp == STACKLEVEL
1506 && !(cctx_current->flags & CC_TRACE)
1507 && !force_cctx
1508 ))
1509 {
1510 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1511 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1512
1513 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1514 /* without this the next cctx_get might destroy the running cctx while still in use */
1515 if (expect_false (CCTX_EXPIRED (cctx_current)))
1516 if (expect_true (!next->cctx))
1517 next->cctx = cctx_get (aTHX);
1518
1519 cctx_put (cctx_current);
1520 }
1521 else
1522 prev->cctx = cctx_current;
1523
1524 ++next->usecount;
1525
1526 cctx_prev = cctx_current;
1527 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1528
1529 next->cctx = 0;
1530
1531 if (expect_false (cctx_prev != cctx_current))
1532 {
1533 cctx_prev->top_env = PL_top_env;
1534 PL_top_env = cctx_current->top_env;
1535 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1536 }
1537
1538 transfer_tail (aTHX);
1539 }
1540}
1541
1542#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1543#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1544
1545/** high level stuff ********************************************************/
1546
1547static int
1548coro_state_destroy (pTHX_ struct coro *coro)
1549{
1550 if (coro->flags & CF_DESTROYED)
1551 return 0;
1552
1553 if (coro->on_destroy && !PL_dirty)
1554 coro->on_destroy (aTHX_ coro);
1555
1556 coro->flags |= CF_DESTROYED;
1557
1558 if (coro->flags & CF_READY)
1559 {
1560 /* reduce nready, as destroying a ready coro effectively unreadies it */
1561 /* alternative: look through all ready queues and remove the coro */
1562 --coro_nready;
1563 }
1564 else
1565 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1566
1567 if (coro->mainstack
1568 && coro->mainstack != main_mainstack
1569 && coro->slot
1570 && !PL_dirty)
1571 coro_destruct_perl (aTHX_ coro);
1572
1573 cctx_destroy (coro->cctx);
1574 SvREFCNT_dec (coro->startcv);
1575 SvREFCNT_dec (coro->args);
1576 SvREFCNT_dec (CORO_THROW);
1577
1578 if (coro->next) coro->next->prev = coro->prev;
1579 if (coro->prev) coro->prev->next = coro->next;
1580 if (coro == coro_first) coro_first = coro->next;
1581
1582 return 1;
1583}
1584
1585static int
1586coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1587{
1588 struct coro *coro = (struct coro *)mg->mg_ptr;
1589 mg->mg_ptr = 0;
1590
1591 coro->hv = 0;
1592
1593 if (--coro->refcnt < 0)
1594 {
1595 coro_state_destroy (aTHX_ coro);
1596 Safefree (coro);
1597 }
1598
1599 return 0;
1600}
1601
1602static int
1603coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1604{
1605 struct coro *coro = (struct coro *)mg->mg_ptr;
1606
1607 ++coro->refcnt;
1608
1609 return 0;
1610}
1611
1612static MGVTBL coro_state_vtbl = {
1613 0, 0, 0, 0,
1614 coro_state_free,
1615 0,
1616#ifdef MGf_DUP
1617 coro_state_dup,
1618#else
1619# define MGf_DUP 0
1620#endif
1621};
1622
1623static void
1624prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1625{
1626 ta->prev = SvSTATE (prev_sv);
1627 ta->next = SvSTATE (next_sv);
1628 TRANSFER_CHECK (*ta);
1629}
1630
1631static void
1632api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1633{
1634 struct coro_transfer_args ta;
1635
1636 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1637 TRANSFER (ta, 1);
1638}
1639
1640/** Coro ********************************************************************/
1641
1642INLINE void
1643coro_enq (pTHX_ struct coro *coro)
1644{
1645 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1646
1647 SvREFCNT_inc_NN (coro->hv);
1648
1649 coro->next_ready = 0;
1650 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1651 ready [1] = coro;
1652}
1653
1654INLINE struct coro *
1655coro_deq (pTHX)
1656{
1657 int prio;
1658
1659 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1660 {
1661 struct coro **ready = coro_ready [prio];
1662
1663 if (ready [0])
1664 {
1665 struct coro *coro = ready [0];
1666 ready [0] = coro->next_ready;
1667 return coro;
1668 }
1669 }
1670
1671 return 0;
1672}
1673
1674static void
1675invoke_sv_ready_hook_helper (void)
1676{
538 dTHX; 1677 dTHX;
539 dSP; 1678 dSP;
540 UNOP myop;
541 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
542 1679
543 coro_init_stacks (); 1680 ENTER;
544 /*PL_curcop = 0;*/ 1681 SAVETMPS;
545 /*PL_in_eval = PL_in_eval;*/ /* inherit */
546 SvREFCNT_dec (GvAV (PL_defgv));
547 GvAV (PL_defgv) = coro->args; coro->args = 0;
548 1682
549 SPAGAIN;
550
551 Zero (&myop, 1, UNOP);
552 myop.op_next = Nullop;
553 myop.op_flags = OPf_WANT_VOID;
554
555 PL_op = (OP *)&myop;
556
557 PUSHMARK(SP); 1683 PUSHMARK (SP);
558 XPUSHs (sub_init);
559 PUTBACK; 1684 PUTBACK;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1685 call_sv (coro_readyhook, G_VOID | G_DISCARD);
561 SPAGAIN;
562 1686
563 ENTER; /* necessary e.g. for dounwind */ 1687 FREETMPS;
1688 LEAVE;
564} 1689}
565 1690
566static void 1691static int
567free_coro_mortal () 1692api_ready (pTHX_ SV *coro_sv)
568{ 1693{
569 if (coro_mortal) 1694 struct coro *coro = SvSTATE (coro_sv);
570 {
571 SvREFCNT_dec (coro_mortal);
572 coro_mortal = 0;
573 }
574}
575 1695
576static void 1696 if (coro->flags & CF_READY)
577coro_run (void *arg)
578{
579 /*
580 * this is a _very_ stripped down perl interpreter ;)
581 */
582 dTHX;
583 int ret;
584
585 UNLOCK;
586
587 PL_top_env = &PL_start_env;
588
589 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
590 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
591
592 /* continue at cctx_init, without entersub */
593 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
594
595 /* somebody will hit me for both perl_run and PL_restartop */
596 ret = perl_run (PERL_GET_CONTEXT);
597 printf ("ret %d\n", ret);//D
598
599 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
600 abort ();
601}
602
603static coro_stack *
604stack_new ()
605{
606 coro_stack *stack;
607
608 New (0, stack, 1, coro_stack);
609
610#if HAVE_MMAP
611
612 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
613 /* mmap suppsedly does allocate-on-write for us */
614 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
615
616 if (stack->sptr == (void *)-1)
617 {
618 perror ("FATAL: unable to mmap stack for coroutine");
619 _exit (EXIT_FAILURE);
620 }
621
622# if STACKGUARD
623 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
624# endif
625
626#else
627
628 stack->ssize = STACKSIZE * (long)sizeof (long);
629 New (0, stack->sptr, STACKSIZE, long);
630
631 if (!stack->sptr)
632 {
633 perror (stderr, "FATAL: unable to malloc stack for coroutine");
634 _exit (EXIT_FAILURE);
635 }
636
637#endif
638
639 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
640
641 return stack;
642}
643
644static void
645stack_free (coro_stack *stack)
646{
647 if (!stack)
648 return; 1697 return 0;
649 1698
650#if HAVE_MMAP 1699 coro->flags |= CF_READY;
651 munmap (stack->sptr, stack->ssize);
652#else
653 Safefree (stack->sptr);
654#endif
655 1700
656 Safefree (stack); 1701 coro_enq (aTHX_ coro);
657}
658 1702
659static coro_stack *stack_first; 1703 if (!coro_nready++)
1704 if (coroapi.readyhook)
1705 coroapi.readyhook ();
660 1706
661static coro_stack * 1707 return 1;
662stack_get () 1708}
663{
664 coro_stack *stack;
665 1709
666 if (stack_first) 1710static int
667 { 1711api_is_ready (pTHX_ SV *coro_sv)
668 stack = stack_first; 1712{
669 stack_first = stack->next; 1713 return !!(SvSTATE (coro_sv)->flags & CF_READY);
670 } 1714}
671 else 1715
1716/* expects to own a reference to next->hv */
1717INLINE void
1718prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1719{
1720 SV *prev_sv = SvRV (coro_current);
1721
1722 ta->prev = SvSTATE_hv (prev_sv);
1723 ta->next = next;
1724
1725 TRANSFER_CHECK (*ta);
1726
1727 SvRV_set (coro_current, (SV *)next->hv);
1728
1729 free_coro_mortal (aTHX);
1730 coro_mortal = prev_sv;
1731}
1732
1733static void
1734prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1735{
1736 for (;;)
672 { 1737 {
673 stack = stack_new (); 1738 struct coro *next = coro_deq (aTHX);
674 PL_op = PL_op->op_next;
675 }
676 1739
677 return stack; 1740 if (expect_true (next))
678}
679
680static void
681stack_put (coro_stack *stack)
682{
683 stack->next = stack_first;
684 stack_first = stack;
685}
686
687/* never call directly, always through the coro_state_transfer global variable */
688static void
689transfer_impl (struct coro *prev, struct coro *next, int flags)
690{
691 dSTACKLEVEL;
692
693 /* sometimes transfer is only called to set idle_sp */
694 if (flags == TRANSFER_SET_STACKLEVEL)
695 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
696 else if (prev != next)
697 {
698 coro_stack *prev__stack;
699
700 LOCK;
701
702 if (next->mainstack)
703 { 1741 {
704 /* coroutine already started */ 1742 /* cannot transfer to destroyed coros, skip and look for next */
705 SAVE (prev, flags); 1743 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
706 LOAD (next); 1744 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1745 else
1746 {
1747 next->flags &= ~CF_READY;
1748 --coro_nready;
1749
1750 prepare_schedule_to (aTHX_ ta, next);
1751 break;
1752 }
707 } 1753 }
708 else 1754 else
709 { 1755 {
710 /* need to start coroutine */ 1756 /* nothing to schedule: call the idle handler */
711 /* first get rid of the old state */ 1757 if (SvROK (sv_idle)
712 SAVE (prev, -1); 1758 && SvOBJECT (SvRV (sv_idle)))
713 /* setup coroutine call */ 1759 {
714 setup_coro (next); 1760 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
715 /* need a stack */ 1761 api_ready (aTHX_ SvRV (sv_idle));
716 next->stack = 0; 1762 --coro_nready;
1763 }
1764 else
1765 {
1766 dSP;
1767
1768 ENTER;
1769 SAVETMPS;
1770
1771 PUSHMARK (SP);
1772 PUTBACK;
1773 call_sv (sv_idle, G_VOID | G_DISCARD);
1774
1775 FREETMPS;
1776 LEAVE;
1777 }
717 } 1778 }
1779 }
1780}
718 1781
719 if (!prev->stack) 1782INLINE void
720 /* create a new empty context */ 1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
721 Newz (0, prev->stack, 1, coro_stack); 1784{
1785 api_ready (aTHX_ coro_current);
1786 prepare_schedule (aTHX_ ta);
1787}
722 1788
723 prev__stack = prev->stack; 1789INLINE void
1790prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1791{
1792 SV *prev = SvRV (coro_current);
724 1793
725 /* possibly "free" the stack */ 1794 if (coro_nready)
726 if (prev__stack->idle_sp == STACKLEVEL) 1795 {
1796 prepare_schedule (aTHX_ ta);
1797 api_ready (aTHX_ prev);
1798 }
1799 else
1800 prepare_nop (aTHX_ ta);
1801}
1802
1803static void
1804api_schedule (pTHX)
1805{
1806 struct coro_transfer_args ta;
1807
1808 prepare_schedule (aTHX_ &ta);
1809 TRANSFER (ta, 1);
1810}
1811
1812static void
1813api_schedule_to (pTHX_ SV *coro_sv)
1814{
1815 struct coro_transfer_args ta;
1816 struct coro *next = SvSTATE (coro_sv);
1817
1818 SvREFCNT_inc_NN (coro_sv);
1819 prepare_schedule_to (aTHX_ &ta, next);
1820}
1821
1822static int
1823api_cede (pTHX)
1824{
1825 struct coro_transfer_args ta;
1826
1827 prepare_cede (aTHX_ &ta);
1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
1832 return 1;
1833 }
1834 else
1835 return 0;
1836}
1837
1838static int
1839api_cede_notself (pTHX)
1840{
1841 if (coro_nready)
1842 {
1843 struct coro_transfer_args ta;
1844
1845 prepare_cede_notself (aTHX_ &ta);
1846 TRANSFER (ta, 1);
1847 return 1;
1848 }
1849 else
1850 return 0;
1851}
1852
1853static void
1854api_trace (pTHX_ SV *coro_sv, int flags)
1855{
1856 struct coro *coro = SvSTATE (coro_sv);
1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1861 if (flags & CC_TRACE)
1862 {
1863 if (!coro->cctx)
1864 coro->cctx = cctx_new_run ();
1865 else if (!(coro->cctx->flags & CC_TRACE))
1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1867
1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1869 }
1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1871 {
1872 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1873
1874 if (coro->flags & CF_RUNNING)
1875 PL_runops = RUNOPS_DEFAULT;
1876 else
1877 coro->slot->runops = RUNOPS_DEFAULT;
1878 }
1879}
1880
1881static void
1882coro_call_on_destroy (pTHX_ struct coro *coro)
1883{
1884 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1885 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1886
1887 if (on_destroyp)
1888 {
1889 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1890
1891 while (AvFILLp (on_destroy) >= 0)
727 { 1892 {
728 stack_put (prev__stack); 1893 dSP; /* don't disturb outer sp */
729 prev->stack = 0; 1894 SV *cb = av_pop (on_destroy);
1895
1896 PUSHMARK (SP);
1897
1898 if (statusp)
1899 {
1900 int i;
1901 AV *status = (AV *)SvRV (*statusp);
1902 EXTEND (SP, AvFILLp (status) + 1);
1903
1904 for (i = 0; i <= AvFILLp (status); ++i)
1905 PUSHs (AvARRAY (status)[i]);
1906 }
1907
1908 PUTBACK;
1909 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
730 } 1910 }
731
732 if (!next->stack)
733 next->stack = stack_get ();
734
735 if (prev__stack != next->stack)
736 {
737 prev__stack->top_env = PL_top_env;
738 PL_top_env = next->stack->top_env;
739 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
740 }
741
742 free_coro_mortal ();
743
744 UNLOCK;
745 }
746}
747
748/* use this function pointer to call the above function */
749/* this is done to increase chances of the compiler not inlining the call */
750/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
751void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
752
753struct transfer_args
754{
755 struct coro *prev, *next;
756 int flags;
757};
758
759#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
760
761static void
762coro_state_destroy (struct coro *coro)
763{
764 if (coro->refcnt--)
765 return;
766
767 if (coro->mainstack && coro->mainstack != main_mainstack)
768 { 1911 }
769 struct coro temp;
770
771 SAVE ((&temp), TRANSFER_SAVE_ALL);
772 LOAD (coro);
773
774 destroy_stacks ();
775
776 LOAD ((&temp)); /* this will get rid of defsv etc.. */
777
778 coro->mainstack = 0;
779 }
780
781 stack_free (coro->stack);
782 SvREFCNT_dec (coro->args);
783 Safefree (coro);
784} 1912}
1913
1914static void
1915slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1916{
1917 int i;
1918 HV *hv = (HV *)SvRV (coro_current);
1919 AV *av = newAV ();
1920
1921 av_extend (av, items - 1);
1922 for (i = 0; i < items; ++i)
1923 av_push (av, SvREFCNT_inc_NN (arg [i]));
1924
1925 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1926
1927 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1928 api_ready (aTHX_ sv_manager);
1929
1930 frame->prepare = prepare_schedule;
1931 frame->check = slf_check_repeat;
1932
1933 /* as a minor optimisation, we could unwind all stacks here */
1934 /* but that puts extra pressure on pp_slf, and is not worth much */
1935 /*coro_unwind_stacks (aTHX);*/
1936}
1937
1938/*****************************************************************************/
1939/* async pool handler */
785 1940
786static int 1941static int
787coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1942slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
788{ 1943{
1944 HV *hv = (HV *)SvRV (coro_current);
789 struct coro *coro = (struct coro *)mg->mg_ptr; 1945 struct coro *coro = (struct coro *)frame->data;
790 mg->mg_ptr = 0;
791 1946
792 coro_state_destroy (coro); 1947 if (!coro->invoke_cb)
793 1948 return 1; /* loop till we have invoke */
794 return 0; 1949 else
795}
796
797static int
798coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
799{
800 struct coro *coro = (struct coro *)mg->mg_ptr;
801
802 ++coro->refcnt;
803
804 return 0;
805}
806
807static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
808
809static struct coro *
810SvSTATE (SV *coro)
811{
812 HV *stash;
813 MAGIC *mg;
814
815 if (SvROK (coro))
816 coro = SvRV (coro);
817
818 stash = SvSTASH (coro);
819 if (stash != coro_stash && stash != coro_state_stash)
820 {
821 /* very slow, but rare, check */
822 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
823 croak ("Coro::State object required");
824 }
825
826 mg = SvMAGIC (coro);
827 assert (mg->mg_type == PERL_MAGIC_ext);
828 return (struct coro *)mg->mg_ptr;
829}
830
831static void
832prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
833{
834 ta->prev = SvSTATE (prev);
835 ta->next = SvSTATE (next);
836 ta->flags = flags;
837}
838
839static void
840api_transfer (SV *prev, SV *next, int flags)
841{
842 dTHX;
843 struct transfer_args ta;
844
845 prepare_transfer (&ta, prev, next, flags);
846 TRANSFER (ta);
847}
848
849/** Coro ********************************************************************/
850
851#define PRIO_MAX 3
852#define PRIO_HIGH 1
853#define PRIO_NORMAL 0
854#define PRIO_LOW -1
855#define PRIO_IDLE -3
856#define PRIO_MIN -4
857
858/* for Coro.pm */
859static GV *coro_current, *coro_idle;
860static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
861static int coro_nready;
862
863static void
864coro_enq (SV *sv)
865{
866 int prio;
867
868 if (SvTYPE (sv) != SVt_PVHV)
869 croak ("Coro::ready tried to enqueue something that is not a coroutine");
870
871 prio = SvSTATE (sv)->prio;
872
873 av_push (coro_ready [prio - PRIO_MIN], sv);
874 coro_nready++;
875}
876
877static SV *
878coro_deq (int min_prio)
879{
880 int prio = PRIO_MAX - PRIO_MIN;
881
882 min_prio -= PRIO_MIN;
883 if (min_prio < 0)
884 min_prio = 0;
885
886 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
887 if (AvFILLp (coro_ready [prio]) >= 0)
888 { 1950 {
889 coro_nready--; 1951 hv_store (hv, "desc", sizeof ("desc") - 1,
890 return av_shift (coro_ready [prio]); 1952 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
891 }
892 1953
893 return 0; 1954 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
894}
895
896static void
897api_ready (SV *coro)
898{
899 dTHX;
900
901 if (SvROK (coro))
902 coro = SvRV (coro);
903
904 LOCK;
905 coro_enq (SvREFCNT_inc (coro));
906 UNLOCK;
907}
908
909static void
910prepare_schedule (struct transfer_args *ta)
911{
912 SV *current, *prev, *next;
913
914 LOCK;
915
916 current = GvSV (coro_current);
917
918 for (;;)
919 {
920 LOCK;
921
922 next = coro_deq (PRIO_MIN);
923
924 if (next)
925 break;
926
927 UNLOCK;
928 1955
929 { 1956 {
930 dSP; 1957 dSP;
931 1958 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
932 ENTER;
933 SAVETMPS;
934
935 PUSHMARK (SP);
936 PUTBACK; 1959 PUTBACK;
937 call_sv (GvSV (coro_idle), G_DISCARD);
938
939 FREETMPS;
940 LEAVE;
941 } 1960 }
1961
1962 SvREFCNT_dec (GvAV (PL_defgv));
1963 GvAV (PL_defgv) = coro->invoke_av;
1964 coro->invoke_av = 0;
1965
1966 return 0;
1967 }
1968}
1969
1970static void
1971slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1972{
1973 HV *hv = (HV *)SvRV (coro_current);
1974 struct coro *coro = SvSTATE_hv ((SV *)hv);
1975
1976 if (expect_true (coro->saved_deffh))
942 } 1977 {
1978 /* subsequent iteration */
1979 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1980 coro->saved_deffh = 0;
943 1981
944 prev = SvRV (current); 1982 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
945 SvRV (current) = next; 1983 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1984 {
1985 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1986 coro->invoke_av = newAV ();
946 1987
947 /* free this only after the transfer */ 1988 frame->prepare = prepare_nop;
948 free_coro_mortal (); 1989 }
949 coro_mortal = prev; 1990 else
1991 {
1992 av_clear (GvAV (PL_defgv));
1993 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
950 1994
951 ta->prev = SvSTATE (prev); 1995 coro->prio = 0;
952 ta->next = SvSTATE (next);
953 ta->flags = TRANSFER_SAVE_ALL;
954 1996
955 UNLOCK; 1997 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
956} 1998 api_trace (aTHX_ coro_current, 0);
957 1999
2000 frame->prepare = prepare_schedule;
2001 av_push (av_async_pool, SvREFCNT_inc (hv));
2002 }
2003 }
2004 else
2005 {
2006 /* first iteration, simply fall through */
2007 frame->prepare = prepare_nop;
2008 }
2009
2010 frame->check = slf_check_pool_handler;
2011 frame->data = (void *)coro;
2012}
2013
2014/*****************************************************************************/
2015/* rouse callback */
2016
2017#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2018
2019static void
2020coro_rouse_callback (pTHX_ CV *cv)
2021{
2022 dXSARGS;
2023 SV *data = (SV *)S_GENSUB_ARG;
2024
2025 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2026 {
2027 /* first call, set args */
2028 SV *coro = SvRV (data);
2029 AV *av = newAV ();
2030
2031 SvRV_set (data, (SV *)av);
2032
2033 /* better take a full copy of the arguments */
2034 while (items--)
2035 av_store (av, items, newSVsv (ST (items)));
2036
2037 api_ready (aTHX_ coro);
2038 SvREFCNT_dec (coro);
2039 }
2040
2041 XSRETURN_EMPTY;
2042}
2043
958static void 2044static int
2045slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2046{
2047 SV *data = (SV *)frame->data;
2048
2049 if (CORO_THROW)
2050 return 0;
2051
2052 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2053 return 1;
2054
2055 /* now push all results on the stack */
2056 {
2057 dSP;
2058 AV *av = (AV *)SvRV (data);
2059 int i;
2060
2061 EXTEND (SP, AvFILLp (av) + 1);
2062 for (i = 0; i <= AvFILLp (av); ++i)
2063 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2064
2065 /* we have stolen the elements, so set length to zero and free */
2066 AvFILLp (av) = -1;
2067 av_undef (av);
2068
2069 PUTBACK;
2070 }
2071
2072 return 0;
2073}
2074
2075static void
2076slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2077{
2078 SV *cb;
2079
2080 if (items)
2081 cb = arg [0];
2082 else
2083 {
2084 struct coro *coro = SvSTATE_current;
2085
2086 if (!coro->rouse_cb)
2087 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2088
2089 cb = sv_2mortal (coro->rouse_cb);
2090 coro->rouse_cb = 0;
2091 }
2092
2093 if (!SvROK (cb)
2094 || SvTYPE (SvRV (cb)) != SVt_PVCV
2095 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2096 croak ("Coro::rouse_wait called with illegal callback argument,");
2097
2098 {
2099 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2100 SV *data = (SV *)S_GENSUB_ARG;
2101
2102 frame->data = (void *)data;
2103 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2104 frame->check = slf_check_rouse_wait;
2105 }
2106}
2107
2108static SV *
2109coro_new_rouse_cb (pTHX)
2110{
2111 HV *hv = (HV *)SvRV (coro_current);
2112 struct coro *coro = SvSTATE_hv (hv);
2113 SV *data = newRV_inc ((SV *)hv);
2114 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2115
2116 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2117 SvREFCNT_dec (data); /* magicext increases the refcount */
2118
2119 SvREFCNT_dec (coro->rouse_cb);
2120 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2121
2122 return cb;
2123}
2124
2125/*****************************************************************************/
2126/* schedule-like-function opcode (SLF) */
2127
2128static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2129static const CV *slf_cv;
2130static SV **slf_argv;
2131static int slf_argc, slf_arga; /* count, allocated */
2132static I32 slf_ax; /* top of stack, for restore */
2133
2134/* this restores the stack in the case we patched the entersub, to */
2135/* recreate the stack frame as perl will on following calls */
2136/* since entersub cleared the stack */
2137static OP *
2138pp_restore (pTHX)
2139{
2140 int i;
2141 SV **SP = PL_stack_base + slf_ax;
2142
2143 PUSHMARK (SP);
2144
2145 EXTEND (SP, slf_argc + 1);
2146
2147 for (i = 0; i < slf_argc; ++i)
2148 PUSHs (sv_2mortal (slf_argv [i]));
2149
2150 PUSHs ((SV *)CvGV (slf_cv));
2151
2152 RETURNOP (slf_restore.op_first);
2153}
2154
2155static void
2156slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2157{
2158 SV **arg = (SV **)slf_frame.data;
2159
2160 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2161}
2162
2163static void
2164slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2165{
2166 if (items != 2)
2167 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2168
2169 frame->prepare = slf_prepare_transfer;
2170 frame->check = slf_check_nop;
2171 frame->data = (void *)arg; /* let's hope it will stay valid */
2172}
2173
2174static void
2175slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2176{
2177 frame->prepare = prepare_schedule;
2178 frame->check = slf_check_nop;
2179}
2180
2181static void
959prepare_cede (struct transfer_args *ta) 2182slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
960{ 2183{
961 LOCK; 2184 struct coro *next = (struct coro *)slf_frame.data;
962 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
963 UNLOCK;
964 2185
2186 SvREFCNT_inc_NN (next->hv);
965 prepare_schedule (ta); 2187 prepare_schedule_to (aTHX_ ta, next);
966} 2188}
967 2189
968static void 2190static void
969api_schedule (void) 2191slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
970{ 2192{
971 dTHX; 2193 if (!items)
2194 croak ("Coro::schedule_to expects a coroutine argument, caught");
2195
2196 frame->data = (void *)SvSTATE (arg [0]);
2197 frame->prepare = slf_prepare_schedule_to;
2198 frame->check = slf_check_nop;
2199}
2200
2201static void
2202slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2203{
2204 api_ready (aTHX_ SvRV (coro_current));
2205
2206 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2207}
2208
2209static void
2210slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2211{
2212 frame->prepare = prepare_cede;
2213 frame->check = slf_check_nop;
2214}
2215
2216static void
2217slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2218{
2219 frame->prepare = prepare_cede_notself;
2220 frame->check = slf_check_nop;
2221}
2222
2223/*
2224 * these not obviously related functions are all rolled into one
2225 * function to increase chances that they all will call transfer with the same
2226 * stack offset
2227 * SLF stands for "schedule-like-function".
2228 */
2229static OP *
2230pp_slf (pTHX)
2231{
2232 I32 checkmark; /* mark SP to see how many elements check has pushed */
2233
2234 /* set up the slf frame, unless it has already been set-up */
2235 /* the latter happens when a new coro has been started */
2236 /* or when a new cctx was attached to an existing coroutine */
2237 if (expect_true (!slf_frame.prepare))
2238 {
2239 /* first iteration */
2240 dSP;
2241 SV **arg = PL_stack_base + TOPMARK + 1;
2242 int items = SP - arg; /* args without function object */
2243 SV *gv = *sp;
2244
2245 /* do a quick consistency check on the "function" object, and if it isn't */
2246 /* for us, divert to the real entersub */
2247 if (SvTYPE (gv) != SVt_PVGV
2248 || !GvCV (gv)
2249 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2250 return PL_ppaddr[OP_ENTERSUB](aTHX);
2251
2252 if (!(PL_op->op_flags & OPf_STACKED))
2253 {
2254 /* ampersand-form of call, use @_ instead of stack */
2255 AV *av = GvAV (PL_defgv);
2256 arg = AvARRAY (av);
2257 items = AvFILLp (av) + 1;
2258 }
2259
2260 /* now call the init function, which needs to set up slf_frame */
2261 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2262 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2263
2264 /* pop args */
2265 SP = PL_stack_base + POPMARK;
2266
2267 PUTBACK;
2268 }
2269
2270 /* now that we have a slf_frame, interpret it! */
2271 /* we use a callback system not to make the code needlessly */
2272 /* complicated, but so we can run multiple perl coros from one cctx */
2273
2274 do
2275 {
972 struct transfer_args ta; 2276 struct coro_transfer_args ta;
973 2277
974 prepare_schedule (&ta); 2278 slf_frame.prepare (aTHX_ &ta);
975 TRANSFER (ta); 2279 TRANSFER (ta, 0);
976}
977 2280
2281 checkmark = PL_stack_sp - PL_stack_base;
2282 }
2283 while (slf_frame.check (aTHX_ &slf_frame));
2284
2285 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2286
2287 /* exception handling */
2288 if (expect_false (CORO_THROW))
2289 {
2290 SV *exception = sv_2mortal (CORO_THROW);
2291
2292 CORO_THROW = 0;
2293 sv_setsv (ERRSV, exception);
2294 croak (0);
2295 }
2296
2297 /* return value handling - mostly like entersub */
2298 /* make sure we put something on the stack in scalar context */
2299 if (GIMME_V == G_SCALAR)
2300 {
2301 dSP;
2302 SV **bot = PL_stack_base + checkmark;
2303
2304 if (sp == bot) /* too few, push undef */
2305 bot [1] = &PL_sv_undef;
2306 else if (sp != bot + 1) /* too many, take last one */
2307 bot [1] = *sp;
2308
2309 SP = bot + 1;
2310
2311 PUTBACK;
2312 }
2313
2314 return NORMAL;
2315}
2316
2317static void
2318api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2319{
2320 int i;
2321 SV **arg = PL_stack_base + ax;
2322 int items = PL_stack_sp - arg + 1;
2323
2324 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2325
2326 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2327 && PL_op->op_ppaddr != pp_slf)
2328 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2329
2330 CvFLAGS (cv) |= CVf_SLF;
2331 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2332 slf_cv = cv;
2333
2334 /* we patch the op, and then re-run the whole call */
2335 /* we have to put the same argument on the stack for this to work */
2336 /* and this will be done by pp_restore */
2337 slf_restore.op_next = (OP *)&slf_restore;
2338 slf_restore.op_type = OP_CUSTOM;
2339 slf_restore.op_ppaddr = pp_restore;
2340 slf_restore.op_first = PL_op;
2341
2342 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2343
2344 if (PL_op->op_flags & OPf_STACKED)
2345 {
2346 if (items > slf_arga)
2347 {
2348 slf_arga = items;
2349 free (slf_argv);
2350 slf_argv = malloc (slf_arga * sizeof (SV *));
2351 }
2352
2353 slf_argc = items;
2354
2355 for (i = 0; i < items; ++i)
2356 slf_argv [i] = SvREFCNT_inc (arg [i]);
2357 }
2358 else
2359 slf_argc = 0;
2360
2361 PL_op->op_ppaddr = pp_slf;
2362 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2363
2364 PL_op = (OP *)&slf_restore;
2365}
2366
2367/*****************************************************************************/
2368/* dynamic wind */
2369
2370static void
2371on_enterleave_call (pTHX_ SV *cb)
2372{
2373 dSP;
2374
2375 PUSHSTACK;
2376
2377 PUSHMARK (SP);
2378 PUTBACK;
2379 call_sv (cb, G_VOID | G_DISCARD);
2380 SPAGAIN;
2381
2382 POPSTACK;
2383}
2384
2385static SV *
2386coro_avp_pop_and_free (pTHX_ AV **avp)
2387{
2388 AV *av = *avp;
2389 SV *res = av_pop (av);
2390
2391 if (AvFILLp (av) < 0)
2392 {
2393 *avp = 0;
2394 SvREFCNT_dec (av);
2395 }
2396
2397 return res;
2398}
2399
2400static void
2401coro_pop_on_enter (pTHX_ void *coro)
2402{
2403 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2404 SvREFCNT_dec (cb);
2405}
2406
2407static void
2408coro_pop_on_leave (pTHX_ void *coro)
2409{
2410 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2411 on_enterleave_call (aTHX_ sv_2mortal (cb));
2412}
2413
2414/*****************************************************************************/
2415/* PerlIO::cede */
2416
2417typedef struct
2418{
2419 PerlIOBuf base;
2420 NV next, every;
2421} PerlIOCede;
2422
2423static IV
2424PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2425{
2426 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2427
2428 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2429 self->next = nvtime () + self->every;
2430
2431 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2432}
2433
2434static SV *
2435PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2436{
2437 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2438
2439 return newSVnv (self->every);
2440}
2441
2442static IV
2443PerlIOCede_flush (pTHX_ PerlIO *f)
2444{
2445 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2446 double now = nvtime ();
2447
2448 if (now >= self->next)
2449 {
2450 api_cede (aTHX);
2451 self->next = now + self->every;
2452 }
2453
2454 return PerlIOBuf_flush (aTHX_ f);
2455}
2456
2457static PerlIO_funcs PerlIO_cede =
2458{
2459 sizeof(PerlIO_funcs),
2460 "cede",
2461 sizeof(PerlIOCede),
2462 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2463 PerlIOCede_pushed,
2464 PerlIOBuf_popped,
2465 PerlIOBuf_open,
2466 PerlIOBase_binmode,
2467 PerlIOCede_getarg,
2468 PerlIOBase_fileno,
2469 PerlIOBuf_dup,
2470 PerlIOBuf_read,
2471 PerlIOBuf_unread,
2472 PerlIOBuf_write,
2473 PerlIOBuf_seek,
2474 PerlIOBuf_tell,
2475 PerlIOBuf_close,
2476 PerlIOCede_flush,
2477 PerlIOBuf_fill,
2478 PerlIOBase_eof,
2479 PerlIOBase_error,
2480 PerlIOBase_clearerr,
2481 PerlIOBase_setlinebuf,
2482 PerlIOBuf_get_base,
2483 PerlIOBuf_bufsiz,
2484 PerlIOBuf_get_ptr,
2485 PerlIOBuf_get_cnt,
2486 PerlIOBuf_set_ptrcnt,
2487};
2488
2489/*****************************************************************************/
2490/* Coro::Semaphore & Coro::Signal */
2491
2492static SV *
2493coro_waitarray_new (pTHX_ int count)
2494{
2495 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2496 AV *av = newAV ();
2497 SV **ary;
2498
2499 /* unfortunately, building manually saves memory */
2500 Newx (ary, 2, SV *);
2501 AvALLOC (av) = ary;
2502#if PERL_VERSION_ATLEAST (5,10,0)
2503 AvARRAY (av) = ary;
2504#else
2505 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2506 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2507 SvPVX ((SV *)av) = (char *)ary;
2508#endif
2509 AvMAX (av) = 1;
2510 AvFILLp (av) = 0;
2511 ary [0] = newSViv (count);
2512
2513 return newRV_noinc ((SV *)av);
2514}
2515
2516/* semaphore */
2517
2518static void
2519coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2520{
2521 SV *count_sv = AvARRAY (av)[0];
2522 IV count = SvIVX (count_sv);
2523
2524 count += adjust;
2525 SvIVX (count_sv) = count;
2526
2527 /* now wake up as many waiters as are expected to lock */
2528 while (count > 0 && AvFILLp (av) > 0)
2529 {
2530 SV *cb;
2531
2532 /* swap first two elements so we can shift a waiter */
2533 AvARRAY (av)[0] = AvARRAY (av)[1];
2534 AvARRAY (av)[1] = count_sv;
2535 cb = av_shift (av);
2536
2537 if (SvOBJECT (cb))
2538 {
2539 api_ready (aTHX_ cb);
2540 --count;
2541 }
2542 else if (SvTYPE (cb) == SVt_PVCV)
2543 {
2544 dSP;
2545 PUSHMARK (SP);
2546 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2547 PUTBACK;
2548 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2549 }
2550
2551 SvREFCNT_dec (cb);
2552 }
2553}
2554
2555static void
2556coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2557{
2558 /* call $sem->adjust (0) to possibly wake up some other waiters */
2559 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2560}
2561
978static void 2562static int
979api_cede (void) 2563slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
980{ 2564{
981 dTHX; 2565 AV *av = (AV *)frame->data;
982 struct transfer_args ta; 2566 SV *count_sv = AvARRAY (av)[0];
983 2567
984 prepare_cede (&ta); 2568 /* if we are about to throw, don't actually acquire the lock, just throw */
985 TRANSFER (ta); 2569 if (CORO_THROW)
986} 2570 return 0;
2571 else if (SvIVX (count_sv) > 0)
2572 {
2573 SvSTATE_current->on_destroy = 0;
987 2574
2575 if (acquire)
2576 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2577 else
2578 coro_semaphore_adjust (aTHX_ av, 0);
2579
2580 return 0;
2581 }
2582 else
2583 {
2584 int i;
2585 /* if we were woken up but can't down, we look through the whole */
2586 /* waiters list and only add us if we aren't in there already */
2587 /* this avoids some degenerate memory usage cases */
2588
2589 for (i = 1; i <= AvFILLp (av); ++i)
2590 if (AvARRAY (av)[i] == SvRV (coro_current))
2591 return 1;
2592
2593 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2594 return 1;
2595 }
2596}
2597
2598static int
2599slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2600{
2601 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2602}
2603
2604static int
2605slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2606{
2607 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2608}
2609
2610static void
2611slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2612{
2613 AV *av = (AV *)SvRV (arg [0]);
2614
2615 if (SvIVX (AvARRAY (av)[0]) > 0)
2616 {
2617 frame->data = (void *)av;
2618 frame->prepare = prepare_nop;
2619 }
2620 else
2621 {
2622 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2623
2624 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2625 frame->prepare = prepare_schedule;
2626
2627 /* to avoid race conditions when a woken-up coro gets terminated */
2628 /* we arrange for a temporary on_destroy that calls adjust (0) */
2629 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2630 }
2631}
2632
2633static void
2634slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2635{
2636 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2637 frame->check = slf_check_semaphore_down;
2638}
2639
2640static void
2641slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2642{
2643 if (items >= 2)
2644 {
2645 /* callback form */
2646 AV *av = (AV *)SvRV (arg [0]);
2647 SV *cb_cv = s_get_cv_croak (arg [1]);
2648
2649 av_push (av, SvREFCNT_inc_NN (cb_cv));
2650
2651 if (SvIVX (AvARRAY (av)[0]) > 0)
2652 coro_semaphore_adjust (aTHX_ av, 0);
2653
2654 frame->prepare = prepare_nop;
2655 frame->check = slf_check_nop;
2656 }
2657 else
2658 {
2659 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2660 frame->check = slf_check_semaphore_wait;
2661 }
2662}
2663
2664/* signal */
2665
2666static void
2667coro_signal_wake (pTHX_ AV *av, int count)
2668{
2669 SvIVX (AvARRAY (av)[0]) = 0;
2670
2671 /* now signal count waiters */
2672 while (count > 0 && AvFILLp (av) > 0)
2673 {
2674 SV *cb;
2675
2676 /* swap first two elements so we can shift a waiter */
2677 cb = AvARRAY (av)[0];
2678 AvARRAY (av)[0] = AvARRAY (av)[1];
2679 AvARRAY (av)[1] = cb;
2680
2681 cb = av_shift (av);
2682
2683 if (SvTYPE (cb) == SVt_PVCV)
2684 {
2685 dSP;
2686 PUSHMARK (SP);
2687 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2688 PUTBACK;
2689 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2690 }
2691 else
2692 {
2693 api_ready (aTHX_ cb);
2694 sv_setiv (cb, 0); /* signal waiter */
2695 }
2696
2697 SvREFCNT_dec (cb);
2698
2699 --count;
2700 }
2701}
2702
2703static int
2704slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2705{
2706 /* if we are about to throw, also stop waiting */
2707 return SvROK ((SV *)frame->data) && !CORO_THROW;
2708}
2709
2710static void
2711slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2712{
2713 AV *av = (AV *)SvRV (arg [0]);
2714
2715 if (items >= 2)
2716 {
2717 SV *cb_cv = s_get_cv_croak (arg [1]);
2718 av_push (av, SvREFCNT_inc_NN (cb_cv));
2719
2720 if (SvIVX (AvARRAY (av)[0]))
2721 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2722
2723 frame->prepare = prepare_nop;
2724 frame->check = slf_check_nop;
2725 }
2726 else if (SvIVX (AvARRAY (av)[0]))
2727 {
2728 SvIVX (AvARRAY (av)[0]) = 0;
2729 frame->prepare = prepare_nop;
2730 frame->check = slf_check_nop;
2731 }
2732 else
2733 {
2734 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2735
2736 av_push (av, waiter);
2737
2738 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2739 frame->prepare = prepare_schedule;
2740 frame->check = slf_check_signal_wait;
2741 }
2742}
2743
2744/*****************************************************************************/
2745/* Coro::AIO */
2746
2747#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2748
2749/* helper storage struct */
2750struct io_state
2751{
2752 int errorno;
2753 I32 laststype; /* U16 in 5.10.0 */
2754 int laststatval;
2755 Stat_t statcache;
2756};
2757
2758static void
2759coro_aio_callback (pTHX_ CV *cv)
2760{
2761 dXSARGS;
2762 AV *state = (AV *)S_GENSUB_ARG;
2763 SV *coro = av_pop (state);
2764 SV *data_sv = newSV (sizeof (struct io_state));
2765
2766 av_extend (state, items - 1);
2767
2768 sv_upgrade (data_sv, SVt_PV);
2769 SvCUR_set (data_sv, sizeof (struct io_state));
2770 SvPOK_only (data_sv);
2771
2772 {
2773 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2774
2775 data->errorno = errno;
2776 data->laststype = PL_laststype;
2777 data->laststatval = PL_laststatval;
2778 data->statcache = PL_statcache;
2779 }
2780
2781 /* now build the result vector out of all the parameters and the data_sv */
2782 {
2783 int i;
2784
2785 for (i = 0; i < items; ++i)
2786 av_push (state, SvREFCNT_inc_NN (ST (i)));
2787 }
2788
2789 av_push (state, data_sv);
2790
2791 api_ready (aTHX_ coro);
2792 SvREFCNT_dec (coro);
2793 SvREFCNT_dec ((AV *)state);
2794}
2795
2796static int
2797slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2798{
2799 AV *state = (AV *)frame->data;
2800
2801 /* if we are about to throw, return early */
2802 /* this does not cancel the aio request, but at least */
2803 /* it quickly returns */
2804 if (CORO_THROW)
2805 return 0;
2806
2807 /* one element that is an RV? repeat! */
2808 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2809 return 1;
2810
2811 /* restore status */
2812 {
2813 SV *data_sv = av_pop (state);
2814 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2815
2816 errno = data->errorno;
2817 PL_laststype = data->laststype;
2818 PL_laststatval = data->laststatval;
2819 PL_statcache = data->statcache;
2820
2821 SvREFCNT_dec (data_sv);
2822 }
2823
2824 /* push result values */
2825 {
2826 dSP;
2827 int i;
2828
2829 EXTEND (SP, AvFILLp (state) + 1);
2830 for (i = 0; i <= AvFILLp (state); ++i)
2831 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2832
2833 PUTBACK;
2834 }
2835
2836 return 0;
2837}
2838
2839static void
2840slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2841{
2842 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2843 SV *coro_hv = SvRV (coro_current);
2844 struct coro *coro = SvSTATE_hv (coro_hv);
2845
2846 /* put our coroutine id on the state arg */
2847 av_push (state, SvREFCNT_inc_NN (coro_hv));
2848
2849 /* first see whether we have a non-zero priority and set it as AIO prio */
2850 if (coro->prio)
2851 {
2852 dSP;
2853
2854 static SV *prio_cv;
2855 static SV *prio_sv;
2856
2857 if (expect_false (!prio_cv))
2858 {
2859 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2860 prio_sv = newSViv (0);
2861 }
2862
2863 PUSHMARK (SP);
2864 sv_setiv (prio_sv, coro->prio);
2865 XPUSHs (prio_sv);
2866
2867 PUTBACK;
2868 call_sv (prio_cv, G_VOID | G_DISCARD);
2869 }
2870
2871 /* now call the original request */
2872 {
2873 dSP;
2874 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2875 int i;
2876
2877 PUSHMARK (SP);
2878
2879 /* first push all args to the stack */
2880 EXTEND (SP, items + 1);
2881
2882 for (i = 0; i < items; ++i)
2883 PUSHs (arg [i]);
2884
2885 /* now push the callback closure */
2886 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2887
2888 /* now call the AIO function - we assume our request is uncancelable */
2889 PUTBACK;
2890 call_sv ((SV *)req, G_VOID | G_DISCARD);
2891 }
2892
2893 /* now that the requets is going, we loop toll we have a result */
2894 frame->data = (void *)state;
2895 frame->prepare = prepare_schedule;
2896 frame->check = slf_check_aio_req;
2897}
2898
2899static void
2900coro_aio_req_xs (pTHX_ CV *cv)
2901{
2902 dXSARGS;
2903
2904 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2905
2906 XSRETURN_EMPTY;
2907}
2908
2909/*****************************************************************************/
2910
2911#if CORO_CLONE
2912# include "clone.c"
2913#endif
2914
988MODULE = Coro::State PACKAGE = Coro::State 2915MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
989 2916
990PROTOTYPES: DISABLE 2917PROTOTYPES: DISABLE
991 2918
992BOOT: 2919BOOT:
993{ 2920{
994#ifdef USE_ITHREADS 2921#ifdef USE_ITHREADS
995 MUTEX_INIT (&coro_mutex); 2922# if CORO_PTHREAD
2923 coro_thx = PERL_GET_CONTEXT;
2924# endif
996#endif 2925#endif
997 BOOT_PAGESIZE; 2926 BOOT_PAGESIZE;
998 2927
2928 cctx_current = cctx_new_empty ();
2929
2930 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2931 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2932
2933 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2934 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2935 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2936
2937 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2938 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2939 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2940
999 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2941 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1000 2942
1001 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2943 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1002 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2944 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1003 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2945 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2946 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1004 2947
1005 main_mainstack = PL_mainstack; 2948 main_mainstack = PL_mainstack;
2949 main_top_env = PL_top_env;
1006 2950
2951 while (main_top_env->je_prev)
2952 main_top_env = main_top_env->je_prev;
2953
2954 {
2955 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2956
2957 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2958 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2959
2960 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2961 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2962 }
2963
1007 coroapi.ver = CORO_API_VERSION; 2964 coroapi.ver = CORO_API_VERSION;
2965 coroapi.rev = CORO_API_REVISION;
2966
1008 coroapi.transfer = api_transfer; 2967 coroapi.transfer = api_transfer;
1009 2968
2969 coroapi.sv_state = SvSTATE_;
2970 coroapi.execute_slf = api_execute_slf;
2971 coroapi.prepare_nop = prepare_nop;
2972 coroapi.prepare_schedule = prepare_schedule;
2973 coroapi.prepare_cede = prepare_cede;
2974 coroapi.prepare_cede_notself = prepare_cede_notself;
2975
2976 {
2977 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2978
2979 if (!svp) croak ("Time::HiRes is required");
2980 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2981
2982 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2983
2984 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2985 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
2986 }
2987
1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2988 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1011} 2989}
1012 2990
1013SV * 2991SV *
1014new (char *klass, ...) 2992new (char *klass, ...)
2993 ALIAS:
2994 Coro::new = 1
1015 CODE: 2995 CODE:
1016{ 2996{
1017 struct coro *coro; 2997 struct coro *coro;
2998 MAGIC *mg;
1018 HV *hv; 2999 HV *hv;
3000 SV *cb;
1019 int i; 3001 int i;
1020 3002
3003 if (items > 1)
3004 {
3005 cb = s_get_cv_croak (ST (1));
3006
3007 if (!ix)
3008 {
3009 if (CvISXSUB (cb))
3010 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3011
3012 if (!CvROOT (cb))
3013 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3014 }
3015 }
3016
1021 Newz (0, coro, 1, struct coro); 3017 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV (); 3018 coro->args = newAV ();
3019 coro->flags = CF_NEW;
1023 3020
3021 if (coro_first) coro_first->prev = coro;
3022 coro->next = coro_first;
3023 coro_first = coro;
3024
1024 hv = newHV (); 3025 coro->hv = hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3026 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3027 mg->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027 3029
3030 if (items > 1)
3031 {
3032 av_extend (coro->args, items - 1 + ix - 1);
3033
3034 if (ix)
3035 {
3036 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3037 cb = (SV *)cv_coro_run;
3038 }
3039
3040 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3041
1028 for (i = 1; i < items; i++) 3042 for (i = 2; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i))); 3043 av_push (coro->args, newSVsv (ST (i)));
1030 3044 }
1031 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1032 /*coro->stack = 0;*/
1033} 3045}
1034 OUTPUT: 3046 OUTPUT:
1035 RETVAL 3047 RETVAL
1036 3048
1037void 3049void
1038_set_stacklevel (...) 3050transfer (...)
1039 ALIAS: 3051 PROTOTYPE: $$
1040 Coro::State::transfer = 1 3052 CODE:
1041 Coro::schedule = 2 3053 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1042 Coro::cede = 3
1043 Coro::Cont::yield = 4
1044 CODE:
1045{
1046 struct transfer_args ta;
1047 3054
1048 switch (ix) 3055bool
1049 { 3056_destroy (SV *coro_sv)
1050 case 0: 3057 CODE:
1051 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3058 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1052 ta.next = 0; 3059 OUTPUT:
1053 ta.flags = TRANSFER_SET_STACKLEVEL; 3060 RETVAL
1054 break;
1055
1056 case 1:
1057 if (items != 3)
1058 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1059
1060 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1061 break;
1062
1063 case 2:
1064 prepare_schedule (&ta);
1065 break;
1066
1067 case 3:
1068 prepare_cede (&ta);
1069 break;
1070
1071 case 4:
1072 {
1073 SV *yieldstack;
1074 SV *sv;
1075 AV *defav = GvAV (PL_defgv);
1076
1077 yieldstack = *hv_fetch (
1078 (HV *)SvRV (GvSV (coro_current)),
1079 "yieldstack", sizeof ("yieldstack") - 1,
1080 0
1081 );
1082
1083 /* set up @_ -- ugly */
1084 av_clear (defav);
1085 av_fill (defav, items - 1);
1086 while (items--)
1087 av_store (defav, items, SvREFCNT_inc (ST(items)));
1088
1089 sv = av_pop ((AV *)SvRV (yieldstack));
1090 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1091 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1092 ta.flags = 0;
1093 SvREFCNT_dec (sv);
1094 }
1095 break;
1096
1097 }
1098
1099 TRANSFER (ta);
1100}
1101 3061
1102void 3062void
1103_clone_state_from (SV *dst, SV *src)
1104 CODE:
1105{
1106 struct coro *coro_src = SvSTATE (src);
1107
1108 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1109
1110 ++coro_src->refcnt;
1111 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1112}
1113
1114void
1115_nonlocal_goto (IV nextop)
1116 CODE:
1117 /* uuh, somebody will kill me again for this */
1118 PL_op->op_next = INT2PTR (OP *, nextop);
1119
1120void
1121_exit (code) 3063_exit (int code)
1122 int code
1123 PROTOTYPE: $ 3064 PROTOTYPE: $
1124 CODE: 3065 CODE:
1125 _exit (code); 3066 _exit (code);
1126 3067
3068SV *
3069clone (Coro::State coro)
3070 CODE:
3071{
3072#if CORO_CLONE
3073 struct coro *ncoro = coro_clone (aTHX_ coro);
3074 MAGIC *mg;
3075 /* TODO: too much duplication */
3076 ncoro->hv = newHV ();
3077 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3078 mg->mg_flags |= MGf_DUP;
3079 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3080#else
3081 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3082#endif
3083}
3084 OUTPUT:
3085 RETVAL
3086
3087int
3088cctx_stacksize (int new_stacksize = 0)
3089 PROTOTYPE: ;$
3090 CODE:
3091 RETVAL = cctx_stacksize;
3092 if (new_stacksize)
3093 {
3094 cctx_stacksize = new_stacksize;
3095 ++cctx_gen;
3096 }
3097 OUTPUT:
3098 RETVAL
3099
3100int
3101cctx_max_idle (int max_idle = 0)
3102 PROTOTYPE: ;$
3103 CODE:
3104 RETVAL = cctx_max_idle;
3105 if (max_idle > 1)
3106 cctx_max_idle = max_idle;
3107 OUTPUT:
3108 RETVAL
3109
3110int
3111cctx_count ()
3112 PROTOTYPE:
3113 CODE:
3114 RETVAL = cctx_count;
3115 OUTPUT:
3116 RETVAL
3117
3118int
3119cctx_idle ()
3120 PROTOTYPE:
3121 CODE:
3122 RETVAL = cctx_idle;
3123 OUTPUT:
3124 RETVAL
3125
3126void
3127list ()
3128 PROTOTYPE:
3129 PPCODE:
3130{
3131 struct coro *coro;
3132 for (coro = coro_first; coro; coro = coro->next)
3133 if (coro->hv)
3134 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3135}
3136
3137void
3138call (Coro::State coro, SV *coderef)
3139 ALIAS:
3140 eval = 1
3141 CODE:
3142{
3143 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3144 {
3145 struct coro *current = SvSTATE_current;
3146
3147 if (current != coro)
3148 {
3149 PUTBACK;
3150 save_perl (aTHX_ current);
3151 load_perl (aTHX_ coro);
3152 SPAGAIN;
3153 }
3154
3155 PUSHSTACK;
3156
3157 PUSHMARK (SP);
3158 PUTBACK;
3159
3160 if (ix)
3161 eval_sv (coderef, 0);
3162 else
3163 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3164
3165 POPSTACK;
3166 SPAGAIN;
3167
3168 if (current != coro)
3169 {
3170 PUTBACK;
3171 save_perl (aTHX_ coro);
3172 load_perl (aTHX_ current);
3173 SPAGAIN;
3174 }
3175 }
3176}
3177
3178SV *
3179is_ready (Coro::State coro)
3180 PROTOTYPE: $
3181 ALIAS:
3182 is_ready = CF_READY
3183 is_running = CF_RUNNING
3184 is_new = CF_NEW
3185 is_destroyed = CF_DESTROYED
3186 is_suspended = CF_SUSPENDED
3187 CODE:
3188 RETVAL = boolSV (coro->flags & ix);
3189 OUTPUT:
3190 RETVAL
3191
3192void
3193throw (Coro::State self, SV *throw = &PL_sv_undef)
3194 PROTOTYPE: $;$
3195 CODE:
3196{
3197 struct coro *current = SvSTATE_current;
3198 SV **throwp = self == current ? &CORO_THROW : &self->except;
3199 SvREFCNT_dec (*throwp);
3200 SvGETMAGIC (throw);
3201 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3202}
3203
3204void
3205api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3206 PROTOTYPE: $;$
3207 C_ARGS: aTHX_ coro, flags
3208
3209SV *
3210has_cctx (Coro::State coro)
3211 PROTOTYPE: $
3212 CODE:
3213 /* maybe manage the running flag differently */
3214 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3215 OUTPUT:
3216 RETVAL
3217
3218int
3219is_traced (Coro::State coro)
3220 PROTOTYPE: $
3221 CODE:
3222 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3223 OUTPUT:
3224 RETVAL
3225
3226UV
3227rss (Coro::State coro)
3228 PROTOTYPE: $
3229 ALIAS:
3230 usecount = 1
3231 CODE:
3232 switch (ix)
3233 {
3234 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3235 case 1: RETVAL = coro->usecount; break;
3236 }
3237 OUTPUT:
3238 RETVAL
3239
3240void
3241force_cctx ()
3242 PROTOTYPE:
3243 CODE:
3244 cctx_current->idle_sp = 0;
3245
3246void
3247swap_defsv (Coro::State self)
3248 PROTOTYPE: $
3249 ALIAS:
3250 swap_defav = 1
3251 CODE:
3252 if (!self->slot)
3253 croak ("cannot swap state with coroutine that has no saved state,");
3254 else
3255 {
3256 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3257 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3258
3259 SV *tmp = *src; *src = *dst; *dst = tmp;
3260 }
3261
3262void
3263cancel (Coro::State self)
3264 CODE:
3265 coro_state_destroy (aTHX_ self);
3266 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3267
3268
3269SV *
3270enable_times (int enabled = enable_times)
3271 CODE:
3272{
3273 RETVAL = boolSV (enable_times);
3274
3275 if (enabled != enable_times)
3276 {
3277 enable_times = enabled;
3278
3279 coro_times_update ();
3280 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3281 }
3282}
3283 OUTPUT:
3284 RETVAL
3285
3286void
3287times (Coro::State self)
3288 PPCODE:
3289{
3290 struct coro *current = SvSTATE (coro_current);
3291
3292 if (expect_false (current == self))
3293 {
3294 coro_times_update ();
3295 coro_times_add (SvSTATE (coro_current));
3296 }
3297
3298 EXTEND (SP, 2);
3299 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3300 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3301
3302 if (expect_false (current == self))
3303 coro_times_sub (SvSTATE (coro_current));
3304}
3305
1127MODULE = Coro::State PACKAGE = Coro 3306MODULE = Coro::State PACKAGE = Coro
1128 3307
1129BOOT: 3308BOOT:
1130{ 3309{
1131 int i; 3310 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3311 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3312 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3313 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3314 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3315 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3316 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3317 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3318 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1132 3319
3320 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3321 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3322 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3323 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3324
1133 coro_stash = gv_stashpv ("Coro", TRUE); 3325 coro_stash = gv_stashpv ("Coro", TRUE);
1134 3326
1135 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3327 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1136 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3328 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1137 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3329 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1138 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3330 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1139 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3331 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1140 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3332 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1141
1142 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1143 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1144
1145 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1146 coro_ready[i] = newAV ();
1147 3333
1148 { 3334 {
1149 SV *sv = perl_get_sv("Coro::API", 1); 3335 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1150 3336
1151 coroapi.schedule = api_schedule; 3337 coroapi.schedule = api_schedule;
3338 coroapi.schedule_to = api_schedule_to;
1152 coroapi.cede = api_cede; 3339 coroapi.cede = api_cede;
3340 coroapi.cede_notself = api_cede_notself;
1153 coroapi.ready = api_ready; 3341 coroapi.ready = api_ready;
3342 coroapi.is_ready = api_is_ready;
1154 coroapi.nready = &coro_nready; 3343 coroapi.nready = coro_nready;
1155 coroapi.current = coro_current; 3344 coroapi.current = coro_current;
1156 3345
1157 GCoroAPI = &coroapi; 3346 /*GCoroAPI = &coroapi;*/
1158 sv_setiv (sv, (IV)&coroapi); 3347 sv_setiv (sv, (IV)&coroapi);
1159 SvREADONLY_on (sv); 3348 SvREADONLY_on (sv);
1160 } 3349 }
1161} 3350}
1162 3351
3352void
3353terminate (...)
3354 CODE:
3355 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3356
3357void
3358schedule (...)
3359 CODE:
3360 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3361
3362void
3363schedule_to (...)
3364 CODE:
3365 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3366
3367void
3368cede_to (...)
3369 CODE:
3370 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3371
3372void
3373cede (...)
3374 CODE:
3375 CORO_EXECUTE_SLF_XS (slf_init_cede);
3376
3377void
3378cede_notself (...)
3379 CODE:
3380 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3381
3382void
3383_set_current (SV *current)
3384 PROTOTYPE: $
3385 CODE:
3386 SvREFCNT_dec (SvRV (coro_current));
3387 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3388
3389void
3390_set_readyhook (SV *hook)
3391 PROTOTYPE: $
3392 CODE:
3393 SvREFCNT_dec (coro_readyhook);
3394 SvGETMAGIC (hook);
3395 if (SvOK (hook))
3396 {
3397 coro_readyhook = newSVsv (hook);
3398 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3399 }
3400 else
3401 {
3402 coro_readyhook = 0;
3403 CORO_READYHOOK = 0;
3404 }
3405
1163int 3406int
1164prio (Coro::State coro, int newprio = 0) 3407prio (Coro::State coro, int newprio = 0)
3408 PROTOTYPE: $;$
1165 ALIAS: 3409 ALIAS:
1166 nice = 1 3410 nice = 1
1167 CODE: 3411 CODE:
1168{ 3412{
1169 RETVAL = coro->prio; 3413 RETVAL = coro->prio;
1170 3414
1171 if (items > 1) 3415 if (items > 1)
1172 { 3416 {
1173 if (ix) 3417 if (ix)
1174 newprio += coro->prio; 3418 newprio = coro->prio - newprio;
1175 3419
1176 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3420 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1177 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3421 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1178 3422
1179 coro->prio = newprio; 3423 coro->prio = newprio;
1180 } 3424 }
1181} 3425}
3426 OUTPUT:
3427 RETVAL
1182 3428
1183void 3429SV *
1184ready (SV *self) 3430ready (SV *self)
1185 PROTOTYPE: $ 3431 PROTOTYPE: $
1186 CODE: 3432 CODE:
1187 api_ready (self); 3433 RETVAL = boolSV (api_ready (aTHX_ self));
3434 OUTPUT:
3435 RETVAL
1188 3436
1189int 3437int
1190nready (...) 3438nready (...)
1191 PROTOTYPE: 3439 PROTOTYPE:
1192 CODE: 3440 CODE:
1193 RETVAL = coro_nready; 3441 RETVAL = coro_nready;
1194 OUTPUT: 3442 OUTPUT:
1195 RETVAL 3443 RETVAL
1196 3444
1197MODULE = 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}
1198 3505
1199SV * 3506SV *
1200_get_state () 3507rouse_cb ()
3508 PROTOTYPE:
1201 CODE: 3509 CODE:
1202{ 3510 RETVAL = coro_new_rouse_cb (aTHX);
1203 struct {
1204 int errorno;
1205 int laststype;
1206 int laststatval;
1207 Stat_t statcache;
1208 } data;
1209
1210 data.errorno = errno;
1211 data.laststype = PL_laststype;
1212 data.laststatval = PL_laststatval;
1213 data.statcache = PL_statcache;
1214
1215 RETVAL = newSVpvn ((char *)&data, sizeof data);
1216}
1217 OUTPUT: 3511 OUTPUT:
1218 RETVAL 3512 RETVAL
1219 3513
1220void 3514void
1221_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
1222 PROTOTYPE: $ 3524 PROTOTYPE: &
1223 CODE: 3525 CODE:
1224{ 3526{
1225 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 {
1226 int errorno; 3637 int i;
1227 int laststype; 3638 EXTEND (SP, wcount);
1228 int laststatval; 3639 for (i = 1; i <= wcount; ++i)
1229 Stat_t statcache; 3640 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1230 } *data = (void *)data_; 3641 }
1231
1232 errno = data->errorno;
1233 PL_laststype = data->laststype;
1234 PL_laststatval = data->laststatval;
1235 PL_statcache = data->statcache;
1236} 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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