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Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.382 by root, Thu Feb 10 08:06:27 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8
9#define PERL_VERSION_ATLEAST(a,b,c) \
10 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14
15#if !PERL_VERSION_ATLEAST (5,8,0)
16# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr
18# endif
19# ifndef call_sv
20# define call_sv perl_call_sv
21# endif
22# ifndef get_sv
23# define get_sv perl_get_sv
24# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif
28# ifndef IS_PADGV
29# define IS_PADGV(v) 0
30# endif
31# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0
33# endif
34#endif
35 17
36#include <stdio.h> 18#include <stdio.h>
37#include <errno.h> 19#include <errno.h>
20#include <assert.h>
38 21
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 22#ifndef SVs_PADSTALE
40# undef STACKGUARD 23# define SVs_PADSTALE 0
41#endif 24#endif
42 25
43#ifndef STACKGUARD 26#ifdef WIN32
44# define STACKGUARD 0 27# undef setjmp
28# undef longjmp
29# undef _exit
30# define setjmp _setjmp /* deep magic */
31#else
32# include <inttypes.h> /* most portable stdint.h */
45#endif 33#endif
46 34
47#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
48# include <unistd.h> 36# include <unistd.h>
49# include <sys/mman.h> 37# include <sys/mman.h>
… …
58# ifndef PAGESIZE 46# ifndef PAGESIZE
59# define PAGESIZE pagesize 47# define PAGESIZE pagesize
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 48# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize; 49static long pagesize;
62# else 50# else
63# define BOOT_PAGESIZE 51# define BOOT_PAGESIZE (void)0
52# endif
53#else
54# define PAGESIZE 0
55# define BOOT_PAGESIZE (void)0
56#endif
57
58#if CORO_USE_VALGRIND
59# include <valgrind/valgrind.h>
60#endif
61
62/* the maximum number of idle cctx that will be pooled */
63static int cctx_max_idle = 4;
64
65#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
66# undef CORO_STACKGUARD
67#endif
68
69#ifndef CORO_STACKGUARD
70# define CORO_STACKGUARD 0
71#endif
72
73/* prefer perl internal functions over our own? */
74#ifndef CORO_PREFER_PERL_FUNCTIONS
75# define CORO_PREFER_PERL_FUNCTIONS 0
76#endif
77
78/* The next macros try to return the current stack pointer, in an as
79 * portable way as possible. */
80#if __GNUC__ >= 4
81# define dSTACKLEVEL int stacklevel_dummy
82# define STACKLEVEL __builtin_frame_address (0)
83#else
84# define dSTACKLEVEL volatile void *stacklevel
85# define STACKLEVEL ((void *)&stacklevel)
86#endif
87
88#define IN_DESTRUCT PL_dirty
89
90#if __GNUC__ >= 3
91# define attribute(x) __attribute__(x)
92# define expect(expr,value) __builtin_expect ((expr), (value))
93# define INLINE static inline
94#else
95# define attribute(x)
96# define expect(expr,value) (expr)
97# define INLINE static
98#endif
99
100#define expect_false(expr) expect ((expr) != 0, 0)
101#define expect_true(expr) expect ((expr) != 0, 1)
102
103#define NOINLINE attribute ((noinline))
104
105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
107
108#ifdef USE_ITHREADS
109# if CORO_PTHREAD
110static void *coro_thx;
64# endif 111# endif
65#endif 112#endif
66 113
67/* The next macro should declare a variable stacklevel that contains and approximation 114#ifdef __linux
68 * to the current C stack pointer. Its property is that it changes with each call 115# include <time.h> /* for timespec */
69 * and should be unique. */ 116# include <syscall.h> /* for SYS_* */
70#define dSTACKLEVEL int stacklevel 117# ifdef SYS_clock_gettime
71#define STACKLEVEL ((void *)&stacklevel) 118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
72 119# define CORO_CLOCK_MONOTONIC 1
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
74 121# endif
75#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x)
77#else
78# define attribute(x)
79#endif 122#endif
80 123
81#define NOINLINE attribute ((noinline)) 124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
82 126
83#include "CoroAPI.h" 127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
84 130
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */ 131static U32 cctx_gen;
86 132static size_t cctx_stacksize = CORO_STACKSIZE;
87#ifdef USE_ITHREADS
88static perl_mutex coro_mutex;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else
92# define LOCK (void)0
93# define UNLOCK (void)0
94#endif
95
96static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 134static AV *main_mainstack; /* used to differentiate between $main and others */
135static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 136static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
138
139static AV *av_destroy; /* destruction queue */
140static SV *sv_manager; /* the manager coro */
141static SV *sv_idle; /* $Coro::idle */
142
143static GV *irsgv; /* $/ */
144static GV *stdoutgv; /* *STDOUT */
145static SV *rv_diehook;
146static SV *rv_warnhook;
147static HV *hv_sig; /* %SIG */
148
149/* async_pool helper stuff */
150static SV *sv_pool_rss;
151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
156
157/* Coro::AnyEvent */
158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
165
166static struct coro_cctx *cctx_first;
167static int cctx_count, cctx_idle;
168
169enum {
170 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04,
173 CC_TRACE_SUB = 0x08, /* trace sub calls */
174 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176};
100 177
101/* this is a structure representing a c-level coroutine */ 178/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 179typedef struct coro_cctx
180{
103 struct coro_stack *next; 181 struct coro_cctx *next;
104 182
105 /* the stack */ 183 /* the stack */
106 void *sptr; 184 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 185 size_t ssize;
108 186
109 /* cpu state */ 187 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 188 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
189 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 190 JMPENV *top_env;
112 coro_context cctx; 191 coro_context cctx;
113} coro_stack; 192
193 U32 gen;
194#if CORO_USE_VALGRIND
195 int valgrind_id;
196#endif
197 unsigned char flags;
198} coro_cctx;
199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
204enum {
205 CF_RUNNING = 0x0001, /* coroutine is running */
206 CF_READY = 0x0002, /* coroutine is ready */
207 CF_NEW = 0x0004, /* has never been switched to */
208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210};
211
212/* the structure where most of the perl state is stored, overlaid on the cxstack */
213typedef struct
214{
215 SV *defsv;
216 AV *defav;
217 SV *errsv;
218 SV *irsgv;
219 HV *hinthv;
220#define VAR(name,type) type name;
221# include "state.h"
222#undef VAR
223} perl_slots;
224
225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 226
115/* this is a structure representing a perl-level coroutine */ 227/* this is a structure representing a perl-level coroutine */
116struct coro { 228struct coro {
117 /* the c coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 230 coro_cctx *cctx;
119 231
120 /* data associated with this coroutine (initial args) */ 232 /* ready queue */
121 AV *args; 233 struct coro *next_ready;
122 int refcnt;
123 234
124 /* optionally saved, might be zero */ 235 /* state data */
125 AV *defav; 236 struct CoroSLF slf_frame; /* saved slf frame */
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 237 AV *mainstack;
137 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
138 OP *op; 239
139 SV **curpad; 240 CV *startcv; /* the CV to execute */
140 AV *comppad; 241 AV *args; /* data associated with this coroutine (initial args) */
141 CV *compcv; 242 int refcnt; /* coroutines are refcounted, yes */
142 SV **stack_base; 243 int flags; /* CF_ flags */
143 SV **stack_max; 244 HV *hv; /* the perl hash associated with this coro, if any */
144 SV **tmps_stack; 245 void (*on_destroy)(pTHX_ struct coro *coro);
145 I32 tmps_floor; 246
146 I32 tmps_ix; 247 /* statistics */
147 I32 tmps_max; 248 int usecount; /* number of transfers to this coro */
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 249
163 /* coro process data */ 250 /* coro process data */
164 int prio; 251 int prio;
252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
165}; 272};
166 273
167typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
169 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
302static SV *coro_select_select;
303
304/* horrible hack, but if it works... */
305static OP *
306coro_pp_sselect (pTHX)
307{
308 dSP;
309 PUSHMARK (SP - 4); /* fake argument list */
310 XPUSHs (coro_select_select);
311 PUTBACK;
312
313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
314 PL_op->op_flags |= OPf_STACKED;
315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
318
319/** lowlevel stuff **********************************************************/
320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
323{
324#if PERL_VERSION_ATLEAST (5,10,0)
325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
326 get_sv (name, create);
327#endif
328 return get_sv (name, create);
329}
330
170static AV * 331static AV *
332coro_get_av (pTHX_ const char *name, int create)
333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351INLINE void
352coro_times_update ()
353{
354#ifdef coro_clock_gettime
355 struct timespec ts;
356
357 ts.tv_sec = ts.tv_nsec = 0;
358 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
359 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
360
361 ts.tv_sec = ts.tv_nsec = 0;
362 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
363 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
364#else
365 dTHX;
366 UV tv[2];
367
368 u2time (aTHX_ tv);
369 time_real [0] = tv [0];
370 time_real [1] = tv [1] * 1000;
371#endif
372}
373
374INLINE void
375coro_times_add (struct coro *c)
376{
377 c->t_real [1] += time_real [1];
378 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
379 c->t_real [0] += time_real [0];
380
381 c->t_cpu [1] += time_cpu [1];
382 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
383 c->t_cpu [0] += time_cpu [0];
384}
385
386INLINE void
387coro_times_sub (struct coro *c)
388{
389 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
390 c->t_real [1] -= time_real [1];
391 c->t_real [0] -= time_real [0];
392
393 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
394 c->t_cpu [1] -= time_cpu [1];
395 c->t_cpu [0] -= time_cpu [0];
396}
397
398/*****************************************************************************/
399/* magic glue */
400
401#define CORO_MAGIC_type_cv 26
402#define CORO_MAGIC_type_state PERL_MAGIC_ext
403
404#define CORO_MAGIC_NN(sv, type) \
405 (expect_true (SvMAGIC (sv)->mg_type == type) \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type))
408
409#define CORO_MAGIC(sv, type) \
410 (expect_true (SvMAGIC (sv)) \
411 ? CORO_MAGIC_NN (sv, type) \
412 : 0)
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
442
443/* faster than SvSTATE, but expects a coroutine hv */
444#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
445#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
446
447/*****************************************************************************/
448/* padlist management and caching */
449
450static AV *
171coro_clone_padlist (CV *cv) 451coro_derive_padlist (pTHX_ CV *cv)
172{ 452{
173 AV *padlist = CvPADLIST (cv); 453 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 454 AV *newpadlist, *newpad;
175 455
176 newpadlist = newAV (); 456 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 457 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 458#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 459 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 460#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 461 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 462#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 463 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist); 464 --AvFILLp (padlist);
185 465
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 466 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
187 av_store (newpadlist, 1, (SV *)newpad); 467 av_store (newpadlist, 1, (SV *)newpad);
188 468
189 return newpadlist; 469 return newpadlist;
190} 470}
191 471
192static void 472static void
193free_padlist (AV *padlist) 473free_padlist (pTHX_ AV *padlist)
194{ 474{
195 /* may be during global destruction */ 475 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 476 if (!IN_DESTRUCT)
197 { 477 {
198 I32 i = AvFILLp (padlist); 478 I32 i = AvFILLp (padlist);
199 while (i >= 0) 479
480 while (i > 0) /* special-case index 0 */
200 { 481 {
201 SV **svp = av_fetch (padlist, i--, FALSE); 482 /* we try to be extra-careful here */
202 if (svp) 483 AV *av = (AV *)AvARRAY (padlist)[i--];
203 { 484 I32 j = AvFILLp (av);
204 SV *sv; 485
205 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 486 while (j >= 0)
487 SvREFCNT_dec (AvARRAY (av)[j--]);
488
489 AvFILLp (av) = -1;
206 SvREFCNT_dec (sv); 490 SvREFCNT_dec (av);
207
208 SvREFCNT_dec (*svp);
209 }
210 } 491 }
211 492
493 SvREFCNT_dec (AvARRAY (padlist)[0]);
494
495 AvFILLp (padlist) = -1;
212 SvREFCNT_dec ((SV*)padlist); 496 SvREFCNT_dec ((SV*)padlist);
213 } 497 }
214} 498}
215 499
216static int 500static int
217coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 501coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
218{ 502{
219 AV *padlist; 503 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 504 AV *av = (AV *)mg->mg_obj;
221 505
506 /* perl manages to free our internal AV and _then_ call us */
507 if (IN_DESTRUCT)
508 return 0;
509
222 /* casting is fun. */ 510 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 511 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 512 free_padlist (aTHX_ padlist);
225 513
226 SvREFCNT_dec (av); 514 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 515
228 return 0; 516 return 0;
229} 517}
230 518
231#define PERL_MAGIC_coro PERL_MAGIC_ext 519static MGVTBL coro_cv_vtbl = {
232 520 0, 0, 0, 0,
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 521 coro_cv_free
522};
234 523
235/* the next two functions merely cache the padlists */ 524/* the next two functions merely cache the padlists */
236static void 525static void
237get_padlist (CV *cv) 526get_padlist (pTHX_ CV *cv)
238{ 527{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 528 MAGIC *mg = CORO_MAGIC_cv (cv);
529 AV *av;
240 530
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 531 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 532 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 533 else
244 { 534 {
245#if 0 535#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 536 /* this is probably cleaner? but also slower! */
537 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 538 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 539 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 540 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 541 SvREFCNT_dec (cp);
251#else 542#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 543 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
253#endif 544#endif
254 } 545 }
255} 546}
256 547
257static void 548static void
258put_padlist (CV *cv) 549put_padlist (pTHX_ CV *cv)
259{ 550{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 551 MAGIC *mg = CORO_MAGIC_cv (cv);
552 AV *av;
261 553
262 if (!mg) 554 if (expect_false (!mg))
555 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
556
557 av = (AV *)mg->mg_obj;
558
559 if (expect_false (AvFILLp (av) >= AvMAX (av)))
560 av_extend (av, AvFILLp (av) + 1);
561
562 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
563}
564
565/** load & save, init *******************************************************/
566
567/* swap sv heads, at least logically */
568static void
569swap_svs (pTHX_ Coro__State c)
570{
571 int i;
572
573 for (i = 0; i <= AvFILLp (c->swap_sv); )
574 {
575 SV *a = AvARRAY (c->swap_sv)[i++];
576 SV *b = AvARRAY (c->swap_sv)[i++];
577
578 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
579 SV tmp;
580
581 /* swap sv_any */
582 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
583
584 /* swap sv_flags */
585 SvFLAGS (&tmp) = SvFLAGS (a);
586 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
587 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
588
589#if PERL_VERSION_ATLEAST (5,10,0)
590 /* perl 5.10 complicates this _quite_ a bit, but it also is
591 * is much faster, so no quarrels here. alternatively, we could
592 * sv_upgrade to avoid this.
593 */
263 { 594 {
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 595 /* swap sv_u */
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 596 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
266 mg->mg_virtual = &vtbl_coro; 597
267 mg->mg_obj = (SV *)newAV (); 598 /* if SvANY points to the head, we need to adjust the pointers,
599 * as the pointer for a still points to b, and maybe vice versa.
600 */
601 #define svany_in_head(type) \
602 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
603
604 if (svany_in_head (SvTYPE (a)))
605 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
606
607 if (svany_in_head (SvTYPE (b)))
608 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
268 } 609 }
269 610#endif
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 611 }
271} 612}
272 613
273#define SB do { 614#define SWAP_SVS(coro) \
274#define SE } while (0) 615 if (expect_false ((coro)->swap_sv)) \
616 swap_svs (aTHX_ (coro))
275 617
276#define LOAD(state) load_state((state));
277#define SAVE(state,flags) save_state((state),(flags));
278
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
280
281static void 618static void
619on_enterleave_call (pTHX_ SV *cb);
620
621static void
282load_state(Coro__State c) 622load_perl (pTHX_ Coro__State c)
283{ 623{
284 PL_dowarn = c->dowarn; 624 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 625 c->slot = 0;
286 626
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 627 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 628
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 629 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 630 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 631 GvSV (PL_errgv) = slot->errsv;
632 GvSV (irsgv) = slot->irsgv;
633 GvHV (PL_hintgv) = slot->hinthv;
634
635 #define VAR(name,type) PL_ ## name = slot->name;
636 # include "state.h"
637 #undef VAR
321 638
322 { 639 {
323 dSP; 640 dSP;
641
324 CV *cv; 642 CV *cv;
325 643
326 /* now do the ugly restore mess */ 644 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 645 while (expect_true (cv = (CV *)POPs))
328 { 646 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 647 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 648 CvDEPTH (cv) = PTR2IV (POPs);
335 } 649 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 650 }
339 651
340 PUTBACK; 652 PUTBACK;
341 } 653 }
342}
343 654
655 slf_frame = c->slf_frame;
656 CORO_THROW = c->except;
657
658 if (expect_false (enable_times))
659 {
660 if (expect_false (!times_valid))
661 coro_times_update ();
662
663 coro_times_sub (c);
664 }
665
666 if (expect_false (c->on_enter))
667 {
668 int i;
669
670 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
671 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
672 }
673
674 SWAP_SVS (c);
675}
676
344static void 677static void
345save_state(Coro__State c, int flags) 678save_perl (pTHX_ Coro__State c)
346{ 679{
680 SWAP_SVS (c);
681
682 if (expect_false (c->on_leave))
683 {
684 int i;
685
686 for (i = AvFILLp (c->on_leave); i >= 0; --i)
687 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
688 }
689
690 times_valid = 0;
691
692 if (expect_false (enable_times))
693 {
694 coro_times_update (); times_valid = 1;
695 coro_times_add (c);
696 }
697
698 c->except = CORO_THROW;
699 c->slf_frame = slf_frame;
700
347 { 701 {
348 dSP; 702 dSP;
349 I32 cxix = cxstack_ix; 703 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 704 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 705 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 707 /*
354 * the worst thing you can imagine happens first - we have to save 708 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 709 * (and reinitialize) all cv's in the whole callchain :(
356 */ 710 */
357 711
358 PUSHs (Nullsv); 712 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 713 /* this loop was inspired by pp_caller */
360 for (;;) 714 for (;;)
361 { 715 {
362 while (cxix >= 0) 716 while (expect_true (cxix >= 0))
363 { 717 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 718 PERL_CONTEXT *cx = &ccstk[cxix--];
365 719
366 if (CxTYPE(cx) == CXt_SUB) 720 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 721 {
368 CV *cv = cx->blk_sub.cv; 722 CV *cv = cx->blk_sub.cv;
723
369 if (CvDEPTH(cv)) 724 if (expect_true (CvDEPTH (cv)))
370 { 725 {
371 EXTEND (SP, CvDEPTH(cv)*2); 726 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 727 PUSHs ((SV *)CvPADLIST (cv));
728 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 729 PUSHs ((SV *)cv);
382 730
731 CvDEPTH (cv) = 0;
383 get_padlist (cv); 732 get_padlist (aTHX_ cv);
384 } 733 }
385 } 734 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 735 }
395 736
396 if (top_si->si_type == PERLSI_MAIN) 737 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 738 break;
398 739
399 top_si = top_si->si_prev; 740 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 741 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 742 cxix = top_si->si_cxix;
402 } 743 }
403 744
404 PUTBACK; 745 PUTBACK;
405 } 746 }
406 747
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 748 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 749 /* we manually unroll here, as usually 2 slots is enough */
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 750 if (SLOT_COUNT >= 1) CXINC;
751 if (SLOT_COUNT >= 2) CXINC;
752 if (SLOT_COUNT >= 3) CXINC;
753 {
754 unsigned int i;
755 for (i = 3; i < SLOT_COUNT; ++i)
756 CXINC;
757 }
758 cxstack_ix -= SLOT_COUNT; /* undo allocation */
410 759
411 c->dowarn = PL_dowarn;
412 c->in_eval = PL_in_eval;
413
414 c->curstackinfo = PL_curstackinfo;
415 c->curstack = PL_curstack;
416 c->mainstack = PL_mainstack; 760 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 761
418 c->op = PL_op; 762 {
419 c->curpad = PL_curpad; 763 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 764
421 c->compcv = PL_compcv; 765 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 766 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 767 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 768 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 769 slot->hinthv = GvHV (PL_hintgv);
426 c->tmps_ix = PL_tmps_ix; 770
427 c->tmps_max = PL_tmps_max; 771 #define VAR(name,type) slot->name = PL_ ## name;
428 c->markstack = PL_markstack; 772 # include "state.h"
429 c->markstack_ptr = PL_markstack_ptr; 773 #undef VAR
430 c->markstack_max = PL_markstack_max; 774 }
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif
442 c->curpm = PL_curpm;
443 c->curcop = PL_curcop;
444} 775}
445 776
446/* 777/*
447 * allocate various perl stacks. This is an exact copy 778 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 779 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 780 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 781 * not usually need a lot of stackspace.
451 */ 782 */
783#if CORO_PREFER_PERL_FUNCTIONS
784# define coro_init_stacks(thx) init_stacks ()
785#else
452static void 786static void
453coro_init_stacks () 787coro_init_stacks (pTHX)
454{ 788{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 789 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 790 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 791 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 792 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 793
460 PL_stack_base = AvARRAY(PL_curstack); 794 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 795 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 796 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 797
464 New(50,PL_tmps_stack,96,SV*); 798 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 799 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 800 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 801 PL_tmps_max = 32;
468 802
469 New(54,PL_markstack,16,I32); 803 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 804 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 805 PL_markstack_max = PL_markstack + 16;
472 806
473#ifdef SET_MARK_OFFSET 807#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 808 SET_MARK_OFFSET;
475#endif 809#endif
476 810
477 New(54,PL_scopestack,16,I32); 811 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 812 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 813 PL_scopestack_max = 8;
480 814
481 New(54,PL_savestack,96,ANY); 815 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 816 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 817 PL_savestack_max = 24;
484 818
485#if !PERL_VERSION_ATLEAST (5,9,0) 819#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 820 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 821 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 822 PL_retstack_max = 4;
489#endif 823#endif
490} 824}
825#endif
491 826
492/* 827/*
493 * destroy the stacks, the callchain etc... 828 * destroy the stacks, the callchain etc...
494 */ 829 */
495static void 830static void
496destroy_stacks() 831coro_destruct_stacks (pTHX)
497{ 832{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 833 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 834 PL_curstackinfo = PL_curstackinfo->si_next;
511 835
512 while (PL_curstackinfo) 836 while (PL_curstackinfo)
513 { 837 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 838 PERL_SI *p = PL_curstackinfo->si_prev;
515 839
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 840 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 841 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 842
528 Safefree (PL_curstackinfo->si_cxstack); 843 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 844 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 845 PL_curstackinfo = p;
531 } 846 }
532 847
533 Safefree (PL_tmps_stack); 848 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 849 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 850 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 851 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 852#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 853 Safefree (PL_retstack);
539#endif 854#endif
540} 855}
541 856
857#define CORO_RSS \
858 rss += sizeof (SYM (curstackinfo)); \
859 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
860 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
861 rss += SYM (tmps_max) * sizeof (SV *); \
862 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
863 rss += SYM (scopestack_max) * sizeof (I32); \
864 rss += SYM (savestack_max) * sizeof (ANY);
865
866static size_t
867coro_rss (pTHX_ struct coro *coro)
868{
869 size_t rss = sizeof (*coro);
870
871 if (coro->mainstack)
872 {
873 if (coro->flags & CF_RUNNING)
874 {
875 #define SYM(sym) PL_ ## sym
876 CORO_RSS;
877 #undef SYM
878 }
879 else
880 {
881 #define SYM(sym) coro->slot->sym
882 CORO_RSS;
883 #undef SYM
884 }
885 }
886
887 return rss;
888}
889
890/** coroutine stack handling ************************************************/
891
892static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
893static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
894static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
895
896/* apparently < 5.8.8 */
897#ifndef MgPV_nolen_const
898#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
899 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
900 (const char*)(mg)->mg_ptr)
901#endif
902
903/*
904 * This overrides the default magic get method of %SIG elements.
905 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
906 * and instead of trying to save and restore the hash elements, we just provide
907 * readback here.
908 */
542static void 909static int
543setup_coro (struct coro *coro) 910coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
911{
912 const char *s = MgPV_nolen_const (mg);
913
914 if (*s == '_')
915 {
916 SV **svp = 0;
917
918 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
919 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
920
921 if (svp)
922 {
923 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
924 return 0;
925 }
926 }
927
928 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
929}
930
931static int
932coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
933{
934 const char *s = MgPV_nolen_const (mg);
935
936 if (*s == '_')
937 {
938 SV **svp = 0;
939
940 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
941 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
942
943 if (svp)
944 {
945 SV *old = *svp;
946 *svp = 0;
947 SvREFCNT_dec (old);
948 return 0;
949 }
950 }
951
952 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
953}
954
955static int
956coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
957{
958 const char *s = MgPV_nolen_const (mg);
959
960 if (*s == '_')
961 {
962 SV **svp = 0;
963
964 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
965 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
966
967 if (svp)
968 {
969 SV *old = *svp;
970 *svp = SvOK (sv) ? newSVsv (sv) : 0;
971 SvREFCNT_dec (old);
972 return 0;
973 }
974 }
975
976 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
977}
978
979static void
980prepare_nop (pTHX_ struct coro_transfer_args *ta)
981{
982 /* kind of mega-hacky, but works */
983 ta->next = ta->prev = (struct coro *)ta;
984}
985
986static int
987slf_check_nop (pTHX_ struct CoroSLF *frame)
988{
989 return 0;
990}
991
992static int
993slf_check_repeat (pTHX_ struct CoroSLF *frame)
994{
995 return 1;
996}
997
998static UNOP init_perl_op;
999
1000static void NOINLINE /* noinline to keep it out of the transfer fast path */
1001init_perl (pTHX_ struct coro *coro)
544{ 1002{
545 /* 1003 /*
546 * emulate part of the perl startup here. 1004 * emulate part of the perl startup here.
547 */ 1005 */
1006 coro_init_stacks (aTHX);
1007
1008 PL_runops = RUNOPS_DEFAULT;
1009 PL_curcop = &PL_compiling;
1010 PL_in_eval = EVAL_NULL;
1011 PL_comppad = 0;
1012 PL_comppad_name = 0;
1013 PL_comppad_name_fill = 0;
1014 PL_comppad_name_floor = 0;
1015 PL_curpm = 0;
1016 PL_curpad = 0;
1017 PL_localizing = 0;
1018 PL_dirty = 0;
1019 PL_restartop = 0;
1020#if PERL_VERSION_ATLEAST (5,10,0)
1021 PL_parser = 0;
1022#endif
1023 PL_hints = 0;
1024
1025 /* recreate the die/warn hooks */
1026 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1027 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1028
1029 GvSV (PL_defgv) = newSV (0);
1030 GvAV (PL_defgv) = coro->args; coro->args = 0;
1031 GvSV (PL_errgv) = newSV (0);
1032 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1033 GvHV (PL_hintgv) = 0;
1034 PL_rs = newSVsv (GvSV (irsgv));
1035 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1036
1037 {
1038 dSP;
1039 UNOP myop;
1040
1041 Zero (&myop, 1, UNOP);
1042 myop.op_next = Nullop;
1043 myop.op_type = OP_ENTERSUB;
1044 myop.op_flags = OPf_WANT_VOID;
1045
1046 PUSHMARK (SP);
1047 PUSHs ((SV *)coro->startcv);
1048 PUTBACK;
1049 PL_op = (OP *)&myop;
1050 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1051 }
1052
1053 /* this newly created coroutine might be run on an existing cctx which most
1054 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1055 */
1056 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1057 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1058
1059 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1060 init_perl_op.op_next = PL_op;
1061 init_perl_op.op_type = OP_ENTERSUB;
1062 init_perl_op.op_ppaddr = pp_slf;
1063 /* no flags etc. required, as an init function won't be called */
1064
1065 PL_op = (OP *)&init_perl_op;
1066
1067 /* copy throw, in case it was set before init_perl */
1068 CORO_THROW = coro->except;
1069
1070 SWAP_SVS (coro);
1071
1072 if (expect_false (enable_times))
1073 {
1074 coro_times_update ();
1075 coro_times_sub (coro);
1076 }
1077}
1078
1079static void
1080coro_unwind_stacks (pTHX)
1081{
1082 if (!IN_DESTRUCT)
1083 {
1084 /* restore all saved variables and stuff */
1085 LEAVE_SCOPE (0);
1086 assert (PL_tmps_floor == -1);
1087
1088 /* free all temporaries */
1089 FREETMPS;
1090 assert (PL_tmps_ix == -1);
1091
1092 /* unwind all extra stacks */
1093 POPSTACK_TO (PL_mainstack);
1094
1095 /* unwind main stack */
1096 dounwind (-1);
1097 }
1098}
1099
1100static void
1101destroy_perl (pTHX_ struct coro *coro)
1102{
1103 SV *svf [9];
1104
1105 {
1106 struct coro *current = SvSTATE_current;
1107
1108 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1109
1110 save_perl (aTHX_ current);
1111 load_perl (aTHX_ coro);
1112
1113 coro_unwind_stacks (aTHX);
1114 coro_destruct_stacks (aTHX);
1115
1116 /* restore swapped sv's */
1117 SWAP_SVS (coro);
1118
1119 // now save some sv's to be free'd later
1120 svf [0] = GvSV (PL_defgv);
1121 svf [1] = (SV *)GvAV (PL_defgv);
1122 svf [2] = GvSV (PL_errgv);
1123 svf [3] = (SV *)PL_defoutgv;
1124 svf [4] = PL_rs;
1125 svf [5] = GvSV (irsgv);
1126 svf [6] = (SV *)GvHV (PL_hintgv);
1127 svf [7] = PL_diehook;
1128 svf [8] = PL_warnhook;
1129 assert (9 == sizeof (svf) / sizeof (*svf));
1130
1131 load_perl (aTHX_ current);
1132 }
1133
1134 {
1135 unsigned int i;
1136
1137 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1138 SvREFCNT_dec (svf [i]);
1139
1140 SvREFCNT_dec (coro->saved_deffh);
1141 SvREFCNT_dec (coro->rouse_cb);
1142 SvREFCNT_dec (coro->invoke_cb);
1143 SvREFCNT_dec (coro->invoke_av);
1144 }
1145}
1146
1147INLINE void
1148free_coro_mortal (pTHX)
1149{
1150 if (expect_true (coro_mortal))
1151 {
1152 SvREFCNT_dec (coro_mortal);
1153 coro_mortal = 0;
1154 }
1155}
1156
1157static int
1158runops_trace (pTHX)
1159{
1160 COP *oldcop = 0;
1161 int oldcxix = -2;
1162
1163 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1164 {
1165 PERL_ASYNC_CHECK ();
1166
1167 if (cctx_current->flags & CC_TRACE_ALL)
1168 {
1169 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1170 {
1171 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1172 SV **bot, **top;
1173 AV *av = newAV (); /* return values */
1174 SV **cb;
1175 dSP;
1176
1177 GV *gv = CvGV (cx->blk_sub.cv);
1178 SV *fullname = sv_2mortal (newSV (0));
1179 if (isGV (gv))
1180 gv_efullname3 (fullname, gv, 0);
1181
1182 bot = PL_stack_base + cx->blk_oldsp + 1;
1183 top = cx->blk_gimme == G_ARRAY ? SP + 1
1184 : cx->blk_gimme == G_SCALAR ? bot + 1
1185 : bot;
1186
1187 av_extend (av, top - bot);
1188 while (bot < top)
1189 av_push (av, SvREFCNT_inc_NN (*bot++));
1190
1191 PL_runops = RUNOPS_DEFAULT;
1192 ENTER;
1193 SAVETMPS;
1194 EXTEND (SP, 3);
1195 PUSHMARK (SP);
1196 PUSHs (&PL_sv_no);
1197 PUSHs (fullname);
1198 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1199 PUTBACK;
1200 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1201 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1202 SPAGAIN;
1203 FREETMPS;
1204 LEAVE;
1205 PL_runops = runops_trace;
1206 }
1207
1208 if (oldcop != PL_curcop)
1209 {
1210 oldcop = PL_curcop;
1211
1212 if (PL_curcop != &PL_compiling)
1213 {
1214 SV **cb;
1215
1216 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1217 {
1218 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1219
1220 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1221 {
1222 dSP;
1223 GV *gv = CvGV (cx->blk_sub.cv);
1224 SV *fullname = sv_2mortal (newSV (0));
1225
1226 if (isGV (gv))
1227 gv_efullname3 (fullname, gv, 0);
1228
1229 PL_runops = RUNOPS_DEFAULT;
1230 ENTER;
1231 SAVETMPS;
1232 EXTEND (SP, 3);
1233 PUSHMARK (SP);
1234 PUSHs (&PL_sv_yes);
1235 PUSHs (fullname);
1236 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1237 PUTBACK;
1238 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1239 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1240 SPAGAIN;
1241 FREETMPS;
1242 LEAVE;
1243 PL_runops = runops_trace;
1244 }
1245
1246 oldcxix = cxstack_ix;
1247 }
1248
1249 if (cctx_current->flags & CC_TRACE_LINE)
1250 {
1251 dSP;
1252
1253 PL_runops = RUNOPS_DEFAULT;
1254 ENTER;
1255 SAVETMPS;
1256 EXTEND (SP, 3);
1257 PL_runops = RUNOPS_DEFAULT;
1258 PUSHMARK (SP);
1259 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1260 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1261 PUTBACK;
1262 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1263 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1264 SPAGAIN;
1265 FREETMPS;
1266 LEAVE;
1267 PL_runops = runops_trace;
1268 }
1269 }
1270 }
1271 }
1272 }
1273
1274 TAINT_NOT;
1275 return 0;
1276}
1277
1278static struct CoroSLF cctx_ssl_frame;
1279
1280static void
1281slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1282{
1283 ta->prev = 0;
1284}
1285
1286static int
1287slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1288{
1289 *frame = cctx_ssl_frame;
1290
1291 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1292}
1293
1294/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1295static void NOINLINE
1296cctx_prepare (pTHX)
1297{
1298 PL_top_env = &PL_start_env;
1299
1300 if (cctx_current->flags & CC_TRACE)
1301 PL_runops = runops_trace;
1302
1303 /* we already must be executing an SLF op, there is no other valid way
1304 * that can lead to creation of a new cctx */
1305 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1306 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1307
1308 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1309 cctx_ssl_frame = slf_frame;
1310
1311 slf_frame.prepare = slf_prepare_set_stacklevel;
1312 slf_frame.check = slf_check_set_stacklevel;
1313}
1314
1315/* the tail of transfer: execute stuff we can only do after a transfer */
1316INLINE void
1317transfer_tail (pTHX)
1318{
1319 free_coro_mortal (aTHX);
1320}
1321
1322/*
1323 * this is a _very_ stripped down perl interpreter ;)
1324 */
1325static void
1326cctx_run (void *arg)
1327{
1328#ifdef USE_ITHREADS
1329# if CORO_PTHREAD
1330 PERL_SET_CONTEXT (coro_thx);
1331# endif
1332#endif
1333 {
1334 dTHX;
1335
1336 /* normally we would need to skip the entersub here */
1337 /* not doing so will re-execute it, which is exactly what we want */
1338 /* PL_nop = PL_nop->op_next */
1339
1340 /* inject a fake subroutine call to cctx_init */
1341 cctx_prepare (aTHX);
1342
1343 /* cctx_run is the alternative tail of transfer() */
1344 transfer_tail (aTHX);
1345
1346 /* somebody or something will hit me for both perl_run and PL_restartop */
1347 PL_restartop = PL_op;
1348 perl_run (PL_curinterp);
1349 /*
1350 * Unfortunately, there is no way to get at the return values of the
1351 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1352 * runtime errors here, as this is just a random interpreter, not a thread.
1353 */
1354
1355 /*
1356 * If perl-run returns we assume exit() was being called or the coro
1357 * fell off the end, which seems to be the only valid (non-bug)
1358 * reason for perl_run to return. We try to exit by jumping to the
1359 * bootstrap-time "top" top_env, as we cannot restore the "main"
1360 * coroutine as Coro has no such concept.
1361 * This actually isn't valid with the pthread backend, but OSes requiring
1362 * that backend are too broken to do it in a standards-compliant way.
1363 */
1364 PL_top_env = main_top_env;
1365 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1366 }
1367}
1368
1369static coro_cctx *
1370cctx_new ()
1371{
1372 coro_cctx *cctx;
1373
1374 ++cctx_count;
1375 New (0, cctx, 1, coro_cctx);
1376
1377 cctx->gen = cctx_gen;
1378 cctx->flags = 0;
1379 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1380
1381 return cctx;
1382}
1383
1384/* create a new cctx only suitable as source */
1385static coro_cctx *
1386cctx_new_empty ()
1387{
1388 coro_cctx *cctx = cctx_new ();
1389
1390 cctx->sptr = 0;
1391 coro_create (&cctx->cctx, 0, 0, 0, 0);
1392
1393 return cctx;
1394}
1395
1396/* create a new cctx suitable as destination/running a perl interpreter */
1397static coro_cctx *
1398cctx_new_run ()
1399{
1400 coro_cctx *cctx = cctx_new ();
1401 void *stack_start;
1402 size_t stack_size;
1403
1404#if HAVE_MMAP
1405 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1406 /* mmap supposedly does allocate-on-write for us */
1407 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1408
1409 if (cctx->sptr != (void *)-1)
1410 {
1411 #if CORO_STACKGUARD
1412 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1413 #endif
1414 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1415 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1416 cctx->flags |= CC_MAPPED;
1417 }
1418 else
1419#endif
1420 {
1421 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1422 New (0, cctx->sptr, cctx_stacksize, long);
1423
1424 if (!cctx->sptr)
1425 {
1426 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1427 _exit (EXIT_FAILURE);
1428 }
1429
1430 stack_start = cctx->sptr;
1431 stack_size = cctx->ssize;
1432 }
1433
1434 #if CORO_USE_VALGRIND
1435 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1436 #endif
1437
1438 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1439
1440 return cctx;
1441}
1442
1443static void
1444cctx_destroy (coro_cctx *cctx)
1445{
1446 if (!cctx)
1447 return;
1448
1449 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1450
1451 --cctx_count;
1452 coro_destroy (&cctx->cctx);
1453
1454 /* coro_transfer creates new, empty cctx's */
1455 if (cctx->sptr)
1456 {
1457 #if CORO_USE_VALGRIND
1458 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1459 #endif
1460
1461#if HAVE_MMAP
1462 if (cctx->flags & CC_MAPPED)
1463 munmap (cctx->sptr, cctx->ssize);
1464 else
1465#endif
1466 Safefree (cctx->sptr);
1467 }
1468
1469 Safefree (cctx);
1470}
1471
1472/* wether this cctx should be destructed */
1473#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1474
1475static coro_cctx *
1476cctx_get (pTHX)
1477{
1478 while (expect_true (cctx_first))
1479 {
1480 coro_cctx *cctx = cctx_first;
1481 cctx_first = cctx->next;
1482 --cctx_idle;
1483
1484 if (expect_true (!CCTX_EXPIRED (cctx)))
1485 return cctx;
1486
1487 cctx_destroy (cctx);
1488 }
1489
1490 return cctx_new_run ();
1491}
1492
1493static void
1494cctx_put (coro_cctx *cctx)
1495{
1496 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1497
1498 /* free another cctx if overlimit */
1499 if (expect_false (cctx_idle >= cctx_max_idle))
1500 {
1501 coro_cctx *first = cctx_first;
1502 cctx_first = first->next;
1503 --cctx_idle;
1504
1505 cctx_destroy (first);
1506 }
1507
1508 ++cctx_idle;
1509 cctx->next = cctx_first;
1510 cctx_first = cctx;
1511}
1512
1513/** coroutine switching *****************************************************/
1514
1515static void
1516transfer_check (pTHX_ struct coro *prev, struct coro *next)
1517{
1518 /* TODO: throwing up here is considered harmful */
1519
1520 if (expect_true (prev != next))
1521 {
1522 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1523 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1524
1525 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1526 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1527
1528#if !PERL_VERSION_ATLEAST (5,10,0)
1529 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1530 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1531#endif
1532 }
1533}
1534
1535/* always use the TRANSFER macro */
1536static void NOINLINE /* noinline so we have a fixed stackframe */
1537transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1538{
1539 dSTACKLEVEL;
1540
1541 /* sometimes transfer is only called to set idle_sp */
1542 if (expect_false (!prev))
1543 {
1544 cctx_current->idle_sp = STACKLEVEL;
1545 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1546 }
1547 else if (expect_true (prev != next))
1548 {
1549 coro_cctx *cctx_prev;
1550
1551 if (expect_false (prev->flags & CF_NEW))
1552 {
1553 /* create a new empty/source context */
1554 prev->flags &= ~CF_NEW;
1555 prev->flags |= CF_RUNNING;
1556 }
1557
1558 prev->flags &= ~CF_RUNNING;
1559 next->flags |= CF_RUNNING;
1560
1561 /* first get rid of the old state */
1562 save_perl (aTHX_ prev);
1563
1564 if (expect_false (next->flags & CF_NEW))
1565 {
1566 /* need to start coroutine */
1567 next->flags &= ~CF_NEW;
1568 /* setup coroutine call */
1569 init_perl (aTHX_ next);
1570 }
1571 else
1572 load_perl (aTHX_ next);
1573
1574 /* possibly untie and reuse the cctx */
1575 if (expect_true (
1576 cctx_current->idle_sp == STACKLEVEL
1577 && !(cctx_current->flags & CC_TRACE)
1578 && !force_cctx
1579 ))
1580 {
1581 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1582 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1583
1584 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1585 /* without this the next cctx_get might destroy the running cctx while still in use */
1586 if (expect_false (CCTX_EXPIRED (cctx_current)))
1587 if (expect_true (!next->cctx))
1588 next->cctx = cctx_get (aTHX);
1589
1590 cctx_put (cctx_current);
1591 }
1592 else
1593 prev->cctx = cctx_current;
1594
1595 ++next->usecount;
1596
1597 cctx_prev = cctx_current;
1598 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1599
1600 next->cctx = 0;
1601
1602 if (expect_false (cctx_prev != cctx_current))
1603 {
1604 cctx_prev->top_env = PL_top_env;
1605 PL_top_env = cctx_current->top_env;
1606 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1607 }
1608
1609 transfer_tail (aTHX);
1610 }
1611}
1612
1613#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1614#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1615
1616/** high level stuff ********************************************************/
1617
1618static int
1619coro_state_destroy (pTHX_ struct coro *coro)
1620{
1621 if (coro->flags & CF_DESTROYED)
1622 return 0;
1623
1624 if (coro->on_destroy && !PL_dirty)
1625 coro->on_destroy (aTHX_ coro);
1626
1627 coro->flags |= CF_DESTROYED;
1628
1629 if (coro->flags & CF_READY)
1630 {
1631 /* reduce nready, as destroying a ready coro effectively unreadies it */
1632 /* alternative: look through all ready queues and remove the coro */
1633 --coro_nready;
1634 }
1635 else
1636 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1637
1638 if (coro->mainstack
1639 && coro->mainstack != main_mainstack
1640 && coro->slot
1641 && !PL_dirty)
1642 destroy_perl (aTHX_ coro);
1643
1644 if (coro->next) coro->next->prev = coro->prev;
1645 if (coro->prev) coro->prev->next = coro->next;
1646 if (coro == coro_first) coro_first = coro->next;
1647
1648 cctx_destroy (coro->cctx);
1649 SvREFCNT_dec (coro->startcv);
1650 SvREFCNT_dec (coro->args);
1651 SvREFCNT_dec (coro->swap_sv);
1652 SvREFCNT_dec (CORO_THROW);
1653
1654 return 1;
1655}
1656
1657static int
1658coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1659{
1660 struct coro *coro = (struct coro *)mg->mg_ptr;
1661 mg->mg_ptr = 0;
1662
1663 coro->hv = 0;
1664
1665 if (--coro->refcnt < 0)
1666 {
1667 coro_state_destroy (aTHX_ coro);
1668 Safefree (coro);
1669 }
1670
1671 return 0;
1672}
1673
1674static int
1675coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1676{
1677 struct coro *coro = (struct coro *)mg->mg_ptr;
1678
1679 ++coro->refcnt;
1680
1681 return 0;
1682}
1683
1684static MGVTBL coro_state_vtbl = {
1685 0, 0, 0, 0,
1686 coro_state_free,
1687 0,
1688#ifdef MGf_DUP
1689 coro_state_dup,
1690#else
1691# define MGf_DUP 0
1692#endif
1693};
1694
1695static void
1696prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1697{
1698 ta->prev = SvSTATE (prev_sv);
1699 ta->next = SvSTATE (next_sv);
1700 TRANSFER_CHECK (*ta);
1701}
1702
1703static void
1704api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1705{
1706 struct coro_transfer_args ta;
1707
1708 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1709 TRANSFER (ta, 1);
1710}
1711
1712/** Coro ********************************************************************/
1713
1714INLINE void
1715coro_enq (pTHX_ struct coro *coro)
1716{
1717 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1718
1719 SvREFCNT_inc_NN (coro->hv);
1720
1721 coro->next_ready = 0;
1722 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1723 ready [1] = coro;
1724}
1725
1726INLINE struct coro *
1727coro_deq (pTHX)
1728{
1729 int prio;
1730
1731 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1732 {
1733 struct coro **ready = coro_ready [prio];
1734
1735 if (ready [0])
1736 {
1737 struct coro *coro = ready [0];
1738 ready [0] = coro->next_ready;
1739 return coro;
1740 }
1741 }
1742
1743 return 0;
1744}
1745
1746static void
1747invoke_sv_ready_hook_helper (void)
1748{
548 dTHX; 1749 dTHX;
549 dSP; 1750 dSP;
550 UNOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1751
553 coro_init_stacks (); 1752 ENTER;
554 /*PL_curcop = 0;*/ 1753 SAVETMPS;
555 /*PL_in_eval = PL_in_eval;*/ /* inherit */
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558 1754
559 SPAGAIN;
560
561 Zero (&myop, 1, UNOP);
562 myop.op_next = Nullop;
563 myop.op_flags = OPf_WANT_VOID;
564
565 PL_op = (OP *)&myop;
566
567 PUSHMARK(SP); 1755 PUSHMARK (SP);
568 XPUSHs (sub_init);
569 PUTBACK; 1756 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1757 call_sv (coro_readyhook, G_VOID | G_DISCARD);
571 SPAGAIN;
572 1758
573 ENTER; /* necessary e.g. for dounwind */ 1759 FREETMPS;
1760 LEAVE;
574} 1761}
575 1762
576static void 1763static int
577free_coro_mortal () 1764api_ready (pTHX_ SV *coro_sv)
578{ 1765{
579 if (coro_mortal) 1766 struct coro *coro = SvSTATE (coro_sv);
580 {
581 SvREFCNT_dec (coro_mortal);
582 coro_mortal = 0;
583 }
584}
585 1767
586static void NOINLINE 1768 if (coro->flags & CF_READY)
587prepare_cctx (coro_stack *cctx)
588{
589 dSP;
590 UNOP myop;
591
592 Zero (&myop, 1, UNOP);
593 myop.op_next = PL_op;
594 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596 PUSHMARK(SP);
597 EXTEND (SP, 2);
598 PUSHs (newSViv (PTR2IV (cctx)));
599 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600 PUTBACK;
601 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 /*
609 * this is a _very_ stripped down perl interpreter ;)
610 */
611 UNLOCK;
612
613 PL_top_env = &PL_start_env;
614 prepare_cctx ((coro_stack *)arg);
615
616 /* somebody will hit me for both perl_run and PL_restartop */
617 perl_run (PERL_GET_CONTEXT);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620 abort ();
621}
622
623static coro_stack *
624stack_new ()
625{
626 coro_stack *stack;
627
628 New (0, stack, 1, coro_stack);
629
630#if HAVE_MMAP
631
632 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633 /* mmap suppsedly does allocate-on-write for us */
634 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636 if (stack->sptr == (void *)-1)
637 {
638 perror ("FATAL: unable to mmap stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642# if STACKGUARD
643 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644# endif
645
646#else
647
648 stack->ssize = STACKSIZE * (long)sizeof (long);
649 New (0, stack->sptr, STACKSIZE, long);
650
651 if (!stack->sptr)
652 {
653 perror (stderr, "FATAL: unable to malloc stack for coroutine");
654 _exit (EXIT_FAILURE);
655 }
656
657#endif
658
659 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661 return stack;
662}
663
664static void
665stack_free (coro_stack *stack)
666{
667 if (!stack)
668 return; 1769 return 0;
669 1770
670#if HAVE_MMAP 1771 coro->flags |= CF_READY;
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675 1772
676 Safefree (stack); 1773 coro_enq (aTHX_ coro);
677}
678 1774
679static coro_stack *stack_first; 1775 if (!coro_nready++)
1776 if (coroapi.readyhook)
1777 coroapi.readyhook ();
680 1778
681static coro_stack * 1779 return 1;
682stack_get () 1780}
683{
684 coro_stack *stack;
685 1781
686 if (stack_first) 1782static int
687 { 1783api_is_ready (pTHX_ SV *coro_sv)
688 stack = stack_first; 1784{
689 stack_first = stack->next; 1785 return !!(SvSTATE (coro_sv)->flags & CF_READY);
690 } 1786}
691 else 1787
1788/* expects to own a reference to next->hv */
1789INLINE void
1790prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1791{
1792 SV *prev_sv = SvRV (coro_current);
1793
1794 ta->prev = SvSTATE_hv (prev_sv);
1795 ta->next = next;
1796
1797 TRANSFER_CHECK (*ta);
1798
1799 SvRV_set (coro_current, (SV *)next->hv);
1800
1801 free_coro_mortal (aTHX);
1802 coro_mortal = prev_sv;
1803}
1804
1805static void
1806prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1807{
1808 for (;;)
692 { 1809 {
693 stack = stack_new (); 1810 struct coro *next = coro_deq (aTHX);
694 PL_op = PL_op->op_next;
695 }
696 1811
697 return stack; 1812 if (expect_true (next))
698}
699
700static void
701stack_put (coro_stack *stack)
702{
703 stack->next = stack_first;
704 stack_first = stack;
705}
706
707/* never call directly, always through the coro_state_transfer global variable */
708static void NOINLINE
709transfer (struct coro *prev, struct coro *next, int flags)
710{
711 dSTACKLEVEL;
712
713 /* sometimes transfer is only called to set idle_sp */
714 if (flags == TRANSFER_SET_STACKLEVEL)
715 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
716 else if (prev != next)
717 {
718 coro_stack *prev__stack;
719
720 LOCK;
721
722 if (next->mainstack)
723 { 1813 {
724 /* coroutine already started */ 1814 /* cannot transfer to destroyed coros, skip and look for next */
725 SAVE (prev, flags); 1815 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
726 LOAD (next); 1816 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1817 else
1818 {
1819 next->flags &= ~CF_READY;
1820 --coro_nready;
1821
1822 prepare_schedule_to (aTHX_ ta, next);
1823 break;
1824 }
727 } 1825 }
728 else 1826 else
729 { 1827 {
730 /* need to start coroutine */ 1828 /* nothing to schedule: call the idle handler */
731 /* first get rid of the old state */ 1829 if (SvROK (sv_idle)
732 SAVE (prev, -1); 1830 && SvOBJECT (SvRV (sv_idle)))
733 /* setup coroutine call */ 1831 {
734 setup_coro (next); 1832 if (SvRV (sv_idle) == SvRV (coro_current))
735 /* need a stack */ 1833 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
736 next->stack = 0; 1834
1835 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1836 api_ready (aTHX_ SvRV (sv_idle));
1837 --coro_nready;
1838 }
1839 else
1840 {
1841 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1842 dSP;
1843
1844 ENTER;
1845 SAVETMPS;
1846
1847 PUSHMARK (SP);
1848 PUTBACK;
1849 call_sv (sv_idle, G_VOID | G_DISCARD);
1850
1851 FREETMPS;
1852 LEAVE;
1853 }
737 } 1854 }
1855 }
1856}
738 1857
739 if (!prev->stack) 1858INLINE void
740 /* create a new empty context */ 1859prepare_cede (pTHX_ struct coro_transfer_args *ta)
741 Newz (0, prev->stack, 1, coro_stack); 1860{
1861 api_ready (aTHX_ coro_current);
1862 prepare_schedule (aTHX_ ta);
1863}
742 1864
743 prev__stack = prev->stack; 1865INLINE void
1866prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1867{
1868 SV *prev = SvRV (coro_current);
744 1869
745 /* possibly "free" the stack */ 1870 if (coro_nready)
746 if (prev__stack->idle_sp == STACKLEVEL) 1871 {
1872 prepare_schedule (aTHX_ ta);
1873 api_ready (aTHX_ prev);
1874 }
1875 else
1876 prepare_nop (aTHX_ ta);
1877}
1878
1879static void
1880api_schedule (pTHX)
1881{
1882 struct coro_transfer_args ta;
1883
1884 prepare_schedule (aTHX_ &ta);
1885 TRANSFER (ta, 1);
1886}
1887
1888static void
1889api_schedule_to (pTHX_ SV *coro_sv)
1890{
1891 struct coro_transfer_args ta;
1892 struct coro *next = SvSTATE (coro_sv);
1893
1894 SvREFCNT_inc_NN (coro_sv);
1895 prepare_schedule_to (aTHX_ &ta, next);
1896}
1897
1898static int
1899api_cede (pTHX)
1900{
1901 struct coro_transfer_args ta;
1902
1903 prepare_cede (aTHX_ &ta);
1904
1905 if (expect_true (ta.prev != ta.next))
1906 {
1907 TRANSFER (ta, 1);
1908 return 1;
1909 }
1910 else
1911 return 0;
1912}
1913
1914static int
1915api_cede_notself (pTHX)
1916{
1917 if (coro_nready)
1918 {
1919 struct coro_transfer_args ta;
1920
1921 prepare_cede_notself (aTHX_ &ta);
1922 TRANSFER (ta, 1);
1923 return 1;
1924 }
1925 else
1926 return 0;
1927}
1928
1929static void
1930api_trace (pTHX_ SV *coro_sv, int flags)
1931{
1932 struct coro *coro = SvSTATE (coro_sv);
1933
1934 if (coro->flags & CF_RUNNING)
1935 croak ("cannot enable tracing on a running coroutine, caught");
1936
1937 if (flags & CC_TRACE)
1938 {
1939 if (!coro->cctx)
1940 coro->cctx = cctx_new_run ();
1941 else if (!(coro->cctx->flags & CC_TRACE))
1942 croak ("cannot enable tracing on coroutine with custom stack, caught");
1943
1944 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1945 }
1946 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1947 {
1948 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1949
1950 if (coro->flags & CF_RUNNING)
1951 PL_runops = RUNOPS_DEFAULT;
1952 else
1953 coro->slot->runops = RUNOPS_DEFAULT;
1954 }
1955}
1956
1957static void
1958coro_call_on_destroy (pTHX_ struct coro *coro)
1959{
1960 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1961 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1962
1963 if (on_destroyp)
1964 {
1965 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1966
1967 while (AvFILLp (on_destroy) >= 0)
747 { 1968 {
748 stack_put (prev__stack); 1969 dSP; /* don't disturb outer sp */
749 prev->stack = 0; 1970 SV *cb = av_pop (on_destroy);
1971
1972 PUSHMARK (SP);
1973
1974 if (statusp)
1975 {
1976 int i;
1977 AV *status = (AV *)SvRV (*statusp);
1978 EXTEND (SP, AvFILLp (status) + 1);
1979
1980 for (i = 0; i <= AvFILLp (status); ++i)
1981 PUSHs (AvARRAY (status)[i]);
1982 }
1983
1984 PUTBACK;
1985 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
750 } 1986 }
751
752 if (!next->stack)
753 next->stack = stack_get ();
754
755 if (prev__stack != next->stack)
756 {
757 prev__stack->top_env = PL_top_env;
758 PL_top_env = next->stack->top_env;
759 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
760 }
761
762 free_coro_mortal ();
763
764 UNLOCK;
765 }
766}
767
768struct transfer_args
769{
770 struct coro *prev, *next;
771 int flags;
772};
773
774#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
775
776static void
777coro_state_destroy (struct coro *coro)
778{
779 if (coro->refcnt--)
780 return;
781
782 if (coro->mainstack && coro->mainstack != main_mainstack)
783 { 1987 }
784 struct coro temp; 1988}
785 1989
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 1990static void
787 LOAD (coro); 1991slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1992{
1993 int i;
1994 HV *hv = (HV *)SvRV (coro_current);
1995 AV *av = newAV ();
788 1996
789 destroy_stacks (); 1997 /* items are actually not so common, so optimise for this case */
790 1998 if (items)
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */
792
793 coro->mainstack = 0;
794 } 1999 {
2000 av_extend (av, items - 1);
795 2001
796 stack_free (coro->stack); 2002 for (i = 0; i < items; ++i)
797 SvREFCNT_dec (coro->args); 2003 av_push (av, SvREFCNT_inc_NN (arg [i]));
798 Safefree (coro); 2004 }
2005
2006 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2007
2008 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2009 api_ready (aTHX_ sv_manager);
2010
2011 frame->prepare = prepare_schedule;
2012 frame->check = slf_check_repeat;
2013
2014 /* as a minor optimisation, we could unwind all stacks here */
2015 /* but that puts extra pressure on pp_slf, and is not worth much */
2016 /*coro_unwind_stacks (aTHX);*/
799} 2017}
2018
2019/*****************************************************************************/
2020/* async pool handler */
800 2021
801static int 2022static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 2023slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
803{ 2024{
2025 HV *hv = (HV *)SvRV (coro_current);
804 struct coro *coro = (struct coro *)mg->mg_ptr; 2026 struct coro *coro = (struct coro *)frame->data;
805 mg->mg_ptr = 0;
806 2027
807 coro_state_destroy (coro); 2028 if (!coro->invoke_cb)
808 2029 return 1; /* loop till we have invoke */
809 return 0; 2030 else
810}
811
812static int
813coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
814{
815 struct coro *coro = (struct coro *)mg->mg_ptr;
816
817 ++coro->refcnt;
818
819 return 0;
820}
821
822static MGVTBL coro_state_vtbl = {
823 0, 0, 0, 0,
824 coro_state_clear,
825 0,
826#ifdef MGf_DUP
827 coro_state_dup,
828#endif
829};
830
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
855{
856 ta->prev = SvSTATE (prev);
857 ta->next = SvSTATE (next);
858 ta->flags = flags;
859}
860
861static void
862api_transfer (SV *prev, SV *next, int flags)
863{
864 dTHX;
865 struct transfer_args ta;
866
867 prepare_transfer (&ta, prev, next, flags);
868 TRANSFER (ta);
869}
870
871/** Coro ********************************************************************/
872
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void
886coro_enq (SV *sv)
887{
888 int prio;
889
890 if (SvTYPE (sv) != SVt_PVHV)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893 prio = SvSTATE (sv)->prio;
894
895 av_push (coro_ready [prio - PRIO_MIN], sv);
896 coro_nready++;
897}
898
899static SV *
900coro_deq (int min_prio)
901{
902 int prio = PRIO_MAX - PRIO_MIN;
903
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909 if (AvFILLp (coro_ready [prio]) >= 0)
910 { 2031 {
911 coro_nready--; 2032 hv_store (hv, "desc", sizeof ("desc") - 1,
912 return av_shift (coro_ready [prio]); 2033 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
913 }
914 2034
915 return 0; 2035 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
916}
917
918static void
919api_ready (SV *coro)
920{
921 dTHX;
922
923 if (SvROK (coro))
924 coro = SvRV (coro);
925
926 LOCK;
927 coro_enq (SvREFCNT_inc (coro));
928 UNLOCK;
929}
930
931static void
932prepare_schedule (struct transfer_args *ta)
933{
934 SV *current, *prev, *next;
935
936 current = GvSV (coro_current);
937
938 for (;;)
939 {
940 LOCK;
941 next = coro_deq (PRIO_MIN);
942 UNLOCK;
943
944 if (next)
945 break;
946 2036
947 { 2037 {
948 dSP; 2038 dSP;
949 2039 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK; 2040 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD);
956
957 FREETMPS;
958 LEAVE;
959 } 2041 }
2042
2043 SvREFCNT_dec (GvAV (PL_defgv));
2044 GvAV (PL_defgv) = coro->invoke_av;
2045 coro->invoke_av = 0;
2046
2047 return 0;
2048 }
2049}
2050
2051static void
2052slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2053{
2054 HV *hv = (HV *)SvRV (coro_current);
2055 struct coro *coro = SvSTATE_hv ((SV *)hv);
2056
2057 if (expect_true (coro->saved_deffh))
960 } 2058 {
2059 /* subsequent iteration */
2060 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2061 coro->saved_deffh = 0;
961 2062
962 prev = SvRV (current); 2063 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
963 SvRV (current) = next; 2064 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2065 {
2066 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2067 coro->invoke_av = newAV ();
964 2068
965 /* free this only after the transfer */ 2069 frame->prepare = prepare_nop;
966 LOCK; 2070 }
967 free_coro_mortal (); 2071 else
968 UNLOCK; 2072 {
969 coro_mortal = prev; 2073 av_clear (GvAV (PL_defgv));
2074 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
970 2075
971 ta->prev = SvSTATE (prev); 2076 coro->prio = 0;
972 ta->next = SvSTATE (next);
973 ta->flags = TRANSFER_SAVE_ALL;
974}
975 2077
2078 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2079 api_trace (aTHX_ coro_current, 0);
2080
2081 frame->prepare = prepare_schedule;
2082 av_push (av_async_pool, SvREFCNT_inc (hv));
2083 }
2084 }
2085 else
2086 {
2087 /* first iteration, simply fall through */
2088 frame->prepare = prepare_nop;
2089 }
2090
2091 frame->check = slf_check_pool_handler;
2092 frame->data = (void *)coro;
2093}
2094
2095/*****************************************************************************/
2096/* rouse callback */
2097
2098#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2099
2100static void
2101coro_rouse_callback (pTHX_ CV *cv)
2102{
2103 dXSARGS;
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
2106 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2107 {
2108 /* first call, set args */
2109 SV *coro = SvRV (data);
2110 AV *av = newAV ();
2111
2112 SvRV_set (data, (SV *)av);
2113
2114 /* better take a full copy of the arguments */
2115 while (items--)
2116 av_store (av, items, newSVsv (ST (items)));
2117
2118 api_ready (aTHX_ coro);
2119 SvREFCNT_dec (coro);
2120 }
2121
2122 XSRETURN_EMPTY;
2123}
2124
976static void 2125static int
2126slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2127{
2128 SV *data = (SV *)frame->data;
2129
2130 if (CORO_THROW)
2131 return 0;
2132
2133 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2134 return 1;
2135
2136 /* now push all results on the stack */
2137 {
2138 dSP;
2139 AV *av = (AV *)SvRV (data);
2140 int i;
2141
2142 EXTEND (SP, AvFILLp (av) + 1);
2143 for (i = 0; i <= AvFILLp (av); ++i)
2144 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2145
2146 /* we have stolen the elements, so set length to zero and free */
2147 AvFILLp (av) = -1;
2148 av_undef (av);
2149
2150 PUTBACK;
2151 }
2152
2153 return 0;
2154}
2155
2156static void
2157slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2158{
2159 SV *cb;
2160
2161 if (items)
2162 cb = arg [0];
2163 else
2164 {
2165 struct coro *coro = SvSTATE_current;
2166
2167 if (!coro->rouse_cb)
2168 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2169
2170 cb = sv_2mortal (coro->rouse_cb);
2171 coro->rouse_cb = 0;
2172 }
2173
2174 if (!SvROK (cb)
2175 || SvTYPE (SvRV (cb)) != SVt_PVCV
2176 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2177 croak ("Coro::rouse_wait called with illegal callback argument,");
2178
2179 {
2180 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2181 SV *data = (SV *)S_GENSUB_ARG;
2182
2183 frame->data = (void *)data;
2184 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2185 frame->check = slf_check_rouse_wait;
2186 }
2187}
2188
2189static SV *
2190coro_new_rouse_cb (pTHX)
2191{
2192 HV *hv = (HV *)SvRV (coro_current);
2193 struct coro *coro = SvSTATE_hv (hv);
2194 SV *data = newRV_inc ((SV *)hv);
2195 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2196
2197 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2198 SvREFCNT_dec (data); /* magicext increases the refcount */
2199
2200 SvREFCNT_dec (coro->rouse_cb);
2201 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2202
2203 return cb;
2204}
2205
2206/*****************************************************************************/
2207/* schedule-like-function opcode (SLF) */
2208
2209static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2210static const CV *slf_cv;
2211static SV **slf_argv;
2212static int slf_argc, slf_arga; /* count, allocated */
2213static I32 slf_ax; /* top of stack, for restore */
2214
2215/* this restores the stack in the case we patched the entersub, to */
2216/* recreate the stack frame as perl will on following calls */
2217/* since entersub cleared the stack */
2218static OP *
2219pp_restore (pTHX)
2220{
2221 int i;
2222 SV **SP = PL_stack_base + slf_ax;
2223
2224 PUSHMARK (SP);
2225
2226 EXTEND (SP, slf_argc + 1);
2227
2228 for (i = 0; i < slf_argc; ++i)
2229 PUSHs (sv_2mortal (slf_argv [i]));
2230
2231 PUSHs ((SV *)CvGV (slf_cv));
2232
2233 RETURNOP (slf_restore.op_first);
2234}
2235
2236static void
2237slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2238{
2239 SV **arg = (SV **)slf_frame.data;
2240
2241 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2242}
2243
2244static void
2245slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2246{
2247 if (items != 2)
2248 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2249
2250 frame->prepare = slf_prepare_transfer;
2251 frame->check = slf_check_nop;
2252 frame->data = (void *)arg; /* let's hope it will stay valid */
2253}
2254
2255static void
2256slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2257{
2258 frame->prepare = prepare_schedule;
2259 frame->check = slf_check_nop;
2260}
2261
2262static void
977prepare_cede (struct transfer_args *ta) 2263slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
978{ 2264{
979 LOCK; 2265 struct coro *next = (struct coro *)slf_frame.data;
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982 2266
2267 SvREFCNT_inc_NN (next->hv);
983 prepare_schedule (ta); 2268 prepare_schedule_to (aTHX_ ta, next);
984} 2269}
985 2270
986static void 2271static void
987api_schedule (void) 2272slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
988{ 2273{
989 dTHX; 2274 if (!items)
2275 croak ("Coro::schedule_to expects a coroutine argument, caught");
2276
2277 frame->data = (void *)SvSTATE (arg [0]);
2278 frame->prepare = slf_prepare_schedule_to;
2279 frame->check = slf_check_nop;
2280}
2281
2282static void
2283slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2284{
2285 api_ready (aTHX_ SvRV (coro_current));
2286
2287 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2288}
2289
2290static void
2291slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 frame->prepare = prepare_cede;
2294 frame->check = slf_check_nop;
2295}
2296
2297static void
2298slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 frame->prepare = prepare_cede_notself;
2301 frame->check = slf_check_nop;
2302}
2303
2304/*
2305 * these not obviously related functions are all rolled into one
2306 * function to increase chances that they all will call transfer with the same
2307 * stack offset
2308 * SLF stands for "schedule-like-function".
2309 */
2310static OP *
2311pp_slf (pTHX)
2312{
2313 I32 checkmark; /* mark SP to see how many elements check has pushed */
2314
2315 /* set up the slf frame, unless it has already been set-up */
2316 /* the latter happens when a new coro has been started */
2317 /* or when a new cctx was attached to an existing coroutine */
2318 if (expect_true (!slf_frame.prepare))
2319 {
2320 /* first iteration */
2321 dSP;
2322 SV **arg = PL_stack_base + TOPMARK + 1;
2323 int items = SP - arg; /* args without function object */
2324 SV *gv = *sp;
2325
2326 /* do a quick consistency check on the "function" object, and if it isn't */
2327 /* for us, divert to the real entersub */
2328 if (SvTYPE (gv) != SVt_PVGV
2329 || !GvCV (gv)
2330 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2331 return PL_ppaddr[OP_ENTERSUB](aTHX);
2332
2333 if (!(PL_op->op_flags & OPf_STACKED))
2334 {
2335 /* ampersand-form of call, use @_ instead of stack */
2336 AV *av = GvAV (PL_defgv);
2337 arg = AvARRAY (av);
2338 items = AvFILLp (av) + 1;
2339 }
2340
2341 /* now call the init function, which needs to set up slf_frame */
2342 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2343 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2344
2345 /* pop args */
2346 SP = PL_stack_base + POPMARK;
2347
2348 PUTBACK;
2349 }
2350
2351 /* now that we have a slf_frame, interpret it! */
2352 /* we use a callback system not to make the code needlessly */
2353 /* complicated, but so we can run multiple perl coros from one cctx */
2354
2355 do
2356 {
990 struct transfer_args ta; 2357 struct coro_transfer_args ta;
991 2358
992 prepare_schedule (&ta); 2359 slf_frame.prepare (aTHX_ &ta);
993 TRANSFER (ta); 2360 TRANSFER (ta, 0);
994}
995 2361
2362 checkmark = PL_stack_sp - PL_stack_base;
2363 }
2364 while (slf_frame.check (aTHX_ &slf_frame));
2365
2366 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2367
2368 /* exception handling */
2369 if (expect_false (CORO_THROW))
2370 {
2371 SV *exception = sv_2mortal (CORO_THROW);
2372
2373 CORO_THROW = 0;
2374 sv_setsv (ERRSV, exception);
2375 croak (0);
2376 }
2377
2378 /* return value handling - mostly like entersub */
2379 /* make sure we put something on the stack in scalar context */
2380 if (GIMME_V == G_SCALAR)
2381 {
2382 dSP;
2383 SV **bot = PL_stack_base + checkmark;
2384
2385 if (sp == bot) /* too few, push undef */
2386 bot [1] = &PL_sv_undef;
2387 else if (sp != bot + 1) /* too many, take last one */
2388 bot [1] = *sp;
2389
2390 SP = bot + 1;
2391
2392 PUTBACK;
2393 }
2394
2395 return NORMAL;
2396}
2397
2398static void
2399api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2400{
2401 int i;
2402 SV **arg = PL_stack_base + ax;
2403 int items = PL_stack_sp - arg + 1;
2404
2405 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2406
2407 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2408 && PL_op->op_ppaddr != pp_slf)
2409 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2410
2411 CvFLAGS (cv) |= CVf_SLF;
2412 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2413 slf_cv = cv;
2414
2415 /* we patch the op, and then re-run the whole call */
2416 /* we have to put the same argument on the stack for this to work */
2417 /* and this will be done by pp_restore */
2418 slf_restore.op_next = (OP *)&slf_restore;
2419 slf_restore.op_type = OP_CUSTOM;
2420 slf_restore.op_ppaddr = pp_restore;
2421 slf_restore.op_first = PL_op;
2422
2423 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2424
2425 if (PL_op->op_flags & OPf_STACKED)
2426 {
2427 if (items > slf_arga)
2428 {
2429 slf_arga = items;
2430 Safefree (slf_argv);
2431 New (0, slf_argv, slf_arga, SV *);
2432 }
2433
2434 slf_argc = items;
2435
2436 for (i = 0; i < items; ++i)
2437 slf_argv [i] = SvREFCNT_inc (arg [i]);
2438 }
2439 else
2440 slf_argc = 0;
2441
2442 PL_op->op_ppaddr = pp_slf;
2443 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2444
2445 PL_op = (OP *)&slf_restore;
2446}
2447
2448/*****************************************************************************/
2449/* dynamic wind */
2450
2451static void
2452on_enterleave_call (pTHX_ SV *cb)
2453{
2454 dSP;
2455
2456 PUSHSTACK;
2457
2458 PUSHMARK (SP);
2459 PUTBACK;
2460 call_sv (cb, G_VOID | G_DISCARD);
2461 SPAGAIN;
2462
2463 POPSTACK;
2464}
2465
2466static SV *
2467coro_avp_pop_and_free (pTHX_ AV **avp)
2468{
2469 AV *av = *avp;
2470 SV *res = av_pop (av);
2471
2472 if (AvFILLp (av) < 0)
2473 {
2474 *avp = 0;
2475 SvREFCNT_dec (av);
2476 }
2477
2478 return res;
2479}
2480
2481static void
2482coro_pop_on_enter (pTHX_ void *coro)
2483{
2484 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2485 SvREFCNT_dec (cb);
2486}
2487
2488static void
2489coro_pop_on_leave (pTHX_ void *coro)
2490{
2491 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2492 on_enterleave_call (aTHX_ sv_2mortal (cb));
2493}
2494
2495/*****************************************************************************/
2496/* PerlIO::cede */
2497
2498typedef struct
2499{
2500 PerlIOBuf base;
2501 NV next, every;
2502} PerlIOCede;
2503
2504static IV
2505PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2506{
2507 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2508
2509 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2510 self->next = nvtime () + self->every;
2511
2512 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2513}
2514
2515static SV *
2516PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2517{
2518 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2519
2520 return newSVnv (self->every);
2521}
2522
2523static IV
2524PerlIOCede_flush (pTHX_ PerlIO *f)
2525{
2526 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2527 double now = nvtime ();
2528
2529 if (now >= self->next)
2530 {
2531 api_cede (aTHX);
2532 self->next = now + self->every;
2533 }
2534
2535 return PerlIOBuf_flush (aTHX_ f);
2536}
2537
2538static PerlIO_funcs PerlIO_cede =
2539{
2540 sizeof(PerlIO_funcs),
2541 "cede",
2542 sizeof(PerlIOCede),
2543 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2544 PerlIOCede_pushed,
2545 PerlIOBuf_popped,
2546 PerlIOBuf_open,
2547 PerlIOBase_binmode,
2548 PerlIOCede_getarg,
2549 PerlIOBase_fileno,
2550 PerlIOBuf_dup,
2551 PerlIOBuf_read,
2552 PerlIOBuf_unread,
2553 PerlIOBuf_write,
2554 PerlIOBuf_seek,
2555 PerlIOBuf_tell,
2556 PerlIOBuf_close,
2557 PerlIOCede_flush,
2558 PerlIOBuf_fill,
2559 PerlIOBase_eof,
2560 PerlIOBase_error,
2561 PerlIOBase_clearerr,
2562 PerlIOBase_setlinebuf,
2563 PerlIOBuf_get_base,
2564 PerlIOBuf_bufsiz,
2565 PerlIOBuf_get_ptr,
2566 PerlIOBuf_get_cnt,
2567 PerlIOBuf_set_ptrcnt,
2568};
2569
2570/*****************************************************************************/
2571/* Coro::Semaphore & Coro::Signal */
2572
2573static SV *
2574coro_waitarray_new (pTHX_ int count)
2575{
2576 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2577 AV *av = newAV ();
2578 SV **ary;
2579
2580 /* unfortunately, building manually saves memory */
2581 Newx (ary, 2, SV *);
2582 AvALLOC (av) = ary;
2583#if PERL_VERSION_ATLEAST (5,10,0)
2584 AvARRAY (av) = ary;
2585#else
2586 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2587 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2588 SvPVX ((SV *)av) = (char *)ary;
2589#endif
2590 AvMAX (av) = 1;
2591 AvFILLp (av) = 0;
2592 ary [0] = newSViv (count);
2593
2594 return newRV_noinc ((SV *)av);
2595}
2596
2597/* semaphore */
2598
2599static void
2600coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2601{
2602 SV *count_sv = AvARRAY (av)[0];
2603 IV count = SvIVX (count_sv);
2604
2605 count += adjust;
2606 SvIVX (count_sv) = count;
2607
2608 /* now wake up as many waiters as are expected to lock */
2609 while (count > 0 && AvFILLp (av) > 0)
2610 {
2611 SV *cb;
2612
2613 /* swap first two elements so we can shift a waiter */
2614 AvARRAY (av)[0] = AvARRAY (av)[1];
2615 AvARRAY (av)[1] = count_sv;
2616 cb = av_shift (av);
2617
2618 if (SvOBJECT (cb))
2619 {
2620 api_ready (aTHX_ cb);
2621 --count;
2622 }
2623 else if (SvTYPE (cb) == SVt_PVCV)
2624 {
2625 dSP;
2626 PUSHMARK (SP);
2627 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2628 PUTBACK;
2629 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2630 }
2631
2632 SvREFCNT_dec (cb);
2633 }
2634}
2635
2636static void
2637coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2638{
2639 /* call $sem->adjust (0) to possibly wake up some other waiters */
2640 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2641}
2642
996static void 2643static int
997api_cede (void) 2644slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
998{ 2645{
999 dTHX; 2646 AV *av = (AV *)frame->data;
1000 struct transfer_args ta; 2647 SV *count_sv = AvARRAY (av)[0];
1001 2648
1002 prepare_cede (&ta); 2649 /* if we are about to throw, don't actually acquire the lock, just throw */
1003 TRANSFER (ta); 2650 if (CORO_THROW)
1004} 2651 return 0;
2652 else if (SvIVX (count_sv) > 0)
2653 {
2654 SvSTATE_current->on_destroy = 0;
1005 2655
2656 if (acquire)
2657 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2658 else
2659 coro_semaphore_adjust (aTHX_ av, 0);
2660
2661 return 0;
2662 }
2663 else
2664 {
2665 int i;
2666 /* if we were woken up but can't down, we look through the whole */
2667 /* waiters list and only add us if we aren't in there already */
2668 /* this avoids some degenerate memory usage cases */
2669
2670 for (i = 1; i <= AvFILLp (av); ++i)
2671 if (AvARRAY (av)[i] == SvRV (coro_current))
2672 return 1;
2673
2674 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2675 return 1;
2676 }
2677}
2678
2679static int
2680slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2681{
2682 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2683}
2684
2685static int
2686slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2687{
2688 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2689}
2690
2691static void
2692slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2693{
2694 AV *av = (AV *)SvRV (arg [0]);
2695
2696 if (SvIVX (AvARRAY (av)[0]) > 0)
2697 {
2698 frame->data = (void *)av;
2699 frame->prepare = prepare_nop;
2700 }
2701 else
2702 {
2703 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2704
2705 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2706 frame->prepare = prepare_schedule;
2707
2708 /* to avoid race conditions when a woken-up coro gets terminated */
2709 /* we arrange for a temporary on_destroy that calls adjust (0) */
2710 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2711 }
2712}
2713
2714static void
2715slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2718 frame->check = slf_check_semaphore_down;
2719}
2720
2721static void
2722slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2723{
2724 if (items >= 2)
2725 {
2726 /* callback form */
2727 AV *av = (AV *)SvRV (arg [0]);
2728 SV *cb_cv = s_get_cv_croak (arg [1]);
2729
2730 av_push (av, SvREFCNT_inc_NN (cb_cv));
2731
2732 if (SvIVX (AvARRAY (av)[0]) > 0)
2733 coro_semaphore_adjust (aTHX_ av, 0);
2734
2735 frame->prepare = prepare_nop;
2736 frame->check = slf_check_nop;
2737 }
2738 else
2739 {
2740 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2741 frame->check = slf_check_semaphore_wait;
2742 }
2743}
2744
2745/* signal */
2746
2747static void
2748coro_signal_wake (pTHX_ AV *av, int count)
2749{
2750 SvIVX (AvARRAY (av)[0]) = 0;
2751
2752 /* now signal count waiters */
2753 while (count > 0 && AvFILLp (av) > 0)
2754 {
2755 SV *cb;
2756
2757 /* swap first two elements so we can shift a waiter */
2758 cb = AvARRAY (av)[0];
2759 AvARRAY (av)[0] = AvARRAY (av)[1];
2760 AvARRAY (av)[1] = cb;
2761
2762 cb = av_shift (av);
2763
2764 if (SvTYPE (cb) == SVt_PVCV)
2765 {
2766 dSP;
2767 PUSHMARK (SP);
2768 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2769 PUTBACK;
2770 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2771 }
2772 else
2773 {
2774 api_ready (aTHX_ cb);
2775 sv_setiv (cb, 0); /* signal waiter */
2776 }
2777
2778 SvREFCNT_dec (cb);
2779
2780 --count;
2781 }
2782}
2783
2784static int
2785slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2786{
2787 /* if we are about to throw, also stop waiting */
2788 return SvROK ((SV *)frame->data) && !CORO_THROW;
2789}
2790
2791static void
2792slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2793{
2794 AV *av = (AV *)SvRV (arg [0]);
2795
2796 if (items >= 2)
2797 {
2798 SV *cb_cv = s_get_cv_croak (arg [1]);
2799 av_push (av, SvREFCNT_inc_NN (cb_cv));
2800
2801 if (SvIVX (AvARRAY (av)[0]))
2802 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2803
2804 frame->prepare = prepare_nop;
2805 frame->check = slf_check_nop;
2806 }
2807 else if (SvIVX (AvARRAY (av)[0]))
2808 {
2809 SvIVX (AvARRAY (av)[0]) = 0;
2810 frame->prepare = prepare_nop;
2811 frame->check = slf_check_nop;
2812 }
2813 else
2814 {
2815 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2816
2817 av_push (av, waiter);
2818
2819 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2820 frame->prepare = prepare_schedule;
2821 frame->check = slf_check_signal_wait;
2822 }
2823}
2824
2825/*****************************************************************************/
2826/* Coro::AIO */
2827
2828#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2829
2830/* helper storage struct */
2831struct io_state
2832{
2833 int errorno;
2834 I32 laststype; /* U16 in 5.10.0 */
2835 int laststatval;
2836 Stat_t statcache;
2837};
2838
2839static void
2840coro_aio_callback (pTHX_ CV *cv)
2841{
2842 dXSARGS;
2843 AV *state = (AV *)S_GENSUB_ARG;
2844 SV *coro = av_pop (state);
2845 SV *data_sv = newSV (sizeof (struct io_state));
2846
2847 av_extend (state, items - 1);
2848
2849 sv_upgrade (data_sv, SVt_PV);
2850 SvCUR_set (data_sv, sizeof (struct io_state));
2851 SvPOK_only (data_sv);
2852
2853 {
2854 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2855
2856 data->errorno = errno;
2857 data->laststype = PL_laststype;
2858 data->laststatval = PL_laststatval;
2859 data->statcache = PL_statcache;
2860 }
2861
2862 /* now build the result vector out of all the parameters and the data_sv */
2863 {
2864 int i;
2865
2866 for (i = 0; i < items; ++i)
2867 av_push (state, SvREFCNT_inc_NN (ST (i)));
2868 }
2869
2870 av_push (state, data_sv);
2871
2872 api_ready (aTHX_ coro);
2873 SvREFCNT_dec (coro);
2874 SvREFCNT_dec ((AV *)state);
2875}
2876
2877static int
2878slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2879{
2880 AV *state = (AV *)frame->data;
2881
2882 /* if we are about to throw, return early */
2883 /* this does not cancel the aio request, but at least */
2884 /* it quickly returns */
2885 if (CORO_THROW)
2886 return 0;
2887
2888 /* one element that is an RV? repeat! */
2889 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2890 return 1;
2891
2892 /* restore status */
2893 {
2894 SV *data_sv = av_pop (state);
2895 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2896
2897 errno = data->errorno;
2898 PL_laststype = data->laststype;
2899 PL_laststatval = data->laststatval;
2900 PL_statcache = data->statcache;
2901
2902 SvREFCNT_dec (data_sv);
2903 }
2904
2905 /* push result values */
2906 {
2907 dSP;
2908 int i;
2909
2910 EXTEND (SP, AvFILLp (state) + 1);
2911 for (i = 0; i <= AvFILLp (state); ++i)
2912 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2913
2914 PUTBACK;
2915 }
2916
2917 return 0;
2918}
2919
2920static void
2921slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2922{
2923 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2924 SV *coro_hv = SvRV (coro_current);
2925 struct coro *coro = SvSTATE_hv (coro_hv);
2926
2927 /* put our coroutine id on the state arg */
2928 av_push (state, SvREFCNT_inc_NN (coro_hv));
2929
2930 /* first see whether we have a non-zero priority and set it as AIO prio */
2931 if (coro->prio)
2932 {
2933 dSP;
2934
2935 static SV *prio_cv;
2936 static SV *prio_sv;
2937
2938 if (expect_false (!prio_cv))
2939 {
2940 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2941 prio_sv = newSViv (0);
2942 }
2943
2944 PUSHMARK (SP);
2945 sv_setiv (prio_sv, coro->prio);
2946 XPUSHs (prio_sv);
2947
2948 PUTBACK;
2949 call_sv (prio_cv, G_VOID | G_DISCARD);
2950 }
2951
2952 /* now call the original request */
2953 {
2954 dSP;
2955 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2956 int i;
2957
2958 PUSHMARK (SP);
2959
2960 /* first push all args to the stack */
2961 EXTEND (SP, items + 1);
2962
2963 for (i = 0; i < items; ++i)
2964 PUSHs (arg [i]);
2965
2966 /* now push the callback closure */
2967 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2968
2969 /* now call the AIO function - we assume our request is uncancelable */
2970 PUTBACK;
2971 call_sv ((SV *)req, G_VOID | G_DISCARD);
2972 }
2973
2974 /* now that the request is going, we loop till we have a result */
2975 frame->data = (void *)state;
2976 frame->prepare = prepare_schedule;
2977 frame->check = slf_check_aio_req;
2978}
2979
2980static void
2981coro_aio_req_xs (pTHX_ CV *cv)
2982{
2983 dXSARGS;
2984
2985 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2986
2987 XSRETURN_EMPTY;
2988}
2989
2990/*****************************************************************************/
2991
2992#if CORO_CLONE
2993# include "clone.c"
2994#endif
2995
2996/*****************************************************************************/
2997
2998static SV *
2999coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3000{
3001 SV *coro_sv;
3002 struct coro *coro;
3003 MAGIC *mg;
3004 HV *hv;
3005 SV *cb;
3006 int i;
3007
3008 if (argc > 0)
3009 {
3010 cb = s_get_cv_croak (argv [0]);
3011
3012 if (!is_coro)
3013 {
3014 if (CvISXSUB (cb))
3015 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3016
3017 if (!CvROOT (cb))
3018 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3019 }
3020 }
3021
3022 Newz (0, coro, 1, struct coro);
3023 coro->args = newAV ();
3024 coro->flags = CF_NEW;
3025
3026 if (coro_first) coro_first->prev = coro;
3027 coro->next = coro_first;
3028 coro_first = coro;
3029
3030 coro->hv = hv = newHV ();
3031 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3034
3035 if (argc > 0)
3036 {
3037 av_extend (coro->args, argc + is_coro - 1);
3038
3039 if (is_coro)
3040 {
3041 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3042 cb = (SV *)cv_coro_run;
3043 }
3044
3045 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3046
3047 for (i = 1; i < argc; i++)
3048 av_push (coro->args, newSVsv (argv [i]));
3049 }
3050
3051 return coro_sv;
3052}
3053
1006MODULE = Coro::State PACKAGE = Coro::State 3054MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 3055
1008PROTOTYPES: DISABLE 3056PROTOTYPES: DISABLE
1009 3057
1010BOOT: 3058BOOT:
1011{ 3059{
1012#ifdef USE_ITHREADS 3060#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 3061# if CORO_PTHREAD
3062 coro_thx = PERL_GET_CONTEXT;
3063# endif
1014#endif 3064#endif
1015 BOOT_PAGESIZE; 3065 BOOT_PAGESIZE;
1016 3066
3067 cctx_current = cctx_new_empty ();
3068
3069 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3070 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3071
3072 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3073 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3074 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3075
3076 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3077 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3078 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3079
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3080 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 3081
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3082 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3083 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3084 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3085 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 3086
1023 main_mainstack = PL_mainstack; 3087 main_mainstack = PL_mainstack;
3088 main_top_env = PL_top_env;
1024 3089
3090 while (main_top_env->je_prev)
3091 main_top_env = main_top_env->je_prev;
3092
3093 {
3094 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3095
3096 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3097 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3098
3099 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3100 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3101 }
3102
1025 coroapi.ver = CORO_API_VERSION; 3103 coroapi.ver = CORO_API_VERSION;
3104 coroapi.rev = CORO_API_REVISION;
3105
1026 coroapi.transfer = api_transfer; 3106 coroapi.transfer = api_transfer;
1027 3107
3108 coroapi.sv_state = SvSTATE_;
3109 coroapi.execute_slf = api_execute_slf;
3110 coroapi.prepare_nop = prepare_nop;
3111 coroapi.prepare_schedule = prepare_schedule;
3112 coroapi.prepare_cede = prepare_cede;
3113 coroapi.prepare_cede_notself = prepare_cede_notself;
3114
3115 {
3116 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3117
3118 if (!svp) croak ("Time::HiRes is required");
3119 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3120
3121 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3122
3123 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3124 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3125 }
3126
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3127 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1029} 3128}
1030 3129
1031SV * 3130SV *
1032new (char *klass, ...) 3131new (SV *klass, ...)
3132 ALIAS:
3133 Coro::new = 1
1033 CODE: 3134 CODE:
1034{ 3135 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1035 struct coro *coro; 3136 OUTPUT:
1036 HV *hv;
1037 int i;
1038
1039 Newz (0, coro, 1, struct coro);
1040 coro->args = newAV ();
1041
1042 hv = newHV ();
1043 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1044 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045
1046 for (i = 1; i < items; i++)
1047 av_push (coro->args, newSVsv (ST (i)));
1048
1049 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1050 /*coro->stack = 0;*/
1051}
1052 OUTPUT:
1053 RETVAL 3137 RETVAL
1054 3138
1055void 3139void
1056_set_stacklevel (...) 3140transfer (...)
1057 ALIAS: 3141 PROTOTYPE: $$
1058 Coro::State::transfer = 1 3142 CODE:
1059 Coro::schedule = 2 3143 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1060 Coro::cede = 3
1061 Coro::Cont::yield = 4
1062 CODE:
1063{
1064 struct transfer_args ta;
1065 3144
1066 switch (ix) 3145bool
1067 { 3146_destroy (SV *coro_sv)
1068 case 0: 3147 CODE:
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3148 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1070 ta.next = 0; 3149 OUTPUT:
1071 ta.flags = TRANSFER_SET_STACKLEVEL; 3150 RETVAL
1072 break;
1073
1074 case 1:
1075 if (items != 3)
1076 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1077
1078 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1079 break;
1080
1081 case 2:
1082 prepare_schedule (&ta);
1083 break;
1084
1085 case 3:
1086 prepare_cede (&ta);
1087 break;
1088
1089 case 4:
1090 {
1091 SV *yieldstack;
1092 SV *sv;
1093 AV *defav = GvAV (PL_defgv);
1094
1095 yieldstack = *hv_fetch (
1096 (HV *)SvRV (GvSV (coro_current)),
1097 "yieldstack", sizeof ("yieldstack") - 1,
1098 0
1099 );
1100
1101 /* set up @_ -- ugly */
1102 av_clear (defav);
1103 av_fill (defav, items - 1);
1104 while (items--)
1105 av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107 sv = av_pop ((AV *)SvRV (yieldstack));
1108 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110 ta.flags = 0;
1111 SvREFCNT_dec (sv);
1112 }
1113 break;
1114
1115 }
1116
1117 TRANSFER (ta);
1118}
1119 3151
1120void 3152void
1121_clone_state_from (SV *dst, SV *src)
1122 CODE:
1123{
1124 struct coro *coro_src = SvSTATE (src);
1125
1126 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128 ++coro_src->refcnt;
1129 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1130}
1131
1132void
1133_exit (code) 3153_exit (int code)
1134 int code
1135 PROTOTYPE: $ 3154 PROTOTYPE: $
1136 CODE: 3155 CODE:
1137 _exit (code); 3156 _exit (code);
1138 3157
3158SV *
3159clone (Coro::State coro)
3160 CODE:
3161{
3162#if CORO_CLONE
3163 struct coro *ncoro = coro_clone (aTHX_ coro);
3164 MAGIC *mg;
3165 /* TODO: too much duplication */
3166 ncoro->hv = newHV ();
3167 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3168 mg->mg_flags |= MGf_DUP;
3169 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3170#else
3171 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3172#endif
3173}
3174 OUTPUT:
3175 RETVAL
3176
3177int
3178cctx_stacksize (int new_stacksize = 0)
3179 PROTOTYPE: ;$
3180 CODE:
3181 RETVAL = cctx_stacksize;
3182 if (new_stacksize)
3183 {
3184 cctx_stacksize = new_stacksize;
3185 ++cctx_gen;
3186 }
3187 OUTPUT:
3188 RETVAL
3189
3190int
3191cctx_max_idle (int max_idle = 0)
3192 PROTOTYPE: ;$
3193 CODE:
3194 RETVAL = cctx_max_idle;
3195 if (max_idle > 1)
3196 cctx_max_idle = max_idle;
3197 OUTPUT:
3198 RETVAL
3199
3200int
3201cctx_count ()
3202 PROTOTYPE:
3203 CODE:
3204 RETVAL = cctx_count;
3205 OUTPUT:
3206 RETVAL
3207
3208int
3209cctx_idle ()
3210 PROTOTYPE:
3211 CODE:
3212 RETVAL = cctx_idle;
3213 OUTPUT:
3214 RETVAL
3215
3216void
3217list ()
3218 PROTOTYPE:
3219 PPCODE:
3220{
3221 struct coro *coro;
3222 for (coro = coro_first; coro; coro = coro->next)
3223 if (coro->hv)
3224 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3225}
3226
3227void
3228call (Coro::State coro, SV *coderef)
3229 ALIAS:
3230 eval = 1
3231 CODE:
3232{
3233 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3234 {
3235 struct coro *current = SvSTATE_current;
3236
3237 if (current != coro)
3238 {
3239 PUTBACK;
3240 save_perl (aTHX_ current);
3241 load_perl (aTHX_ coro);
3242 SPAGAIN;
3243 }
3244
3245 PUSHSTACK;
3246
3247 PUSHMARK (SP);
3248 PUTBACK;
3249
3250 if (ix)
3251 eval_sv (coderef, 0);
3252 else
3253 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3254
3255 POPSTACK;
3256 SPAGAIN;
3257
3258 if (current != coro)
3259 {
3260 PUTBACK;
3261 save_perl (aTHX_ coro);
3262 load_perl (aTHX_ current);
3263 SPAGAIN;
3264 }
3265 }
3266}
3267
3268SV *
3269is_ready (Coro::State coro)
3270 PROTOTYPE: $
3271 ALIAS:
3272 is_ready = CF_READY
3273 is_running = CF_RUNNING
3274 is_new = CF_NEW
3275 is_destroyed = CF_DESTROYED
3276 is_suspended = CF_SUSPENDED
3277 CODE:
3278 RETVAL = boolSV (coro->flags & ix);
3279 OUTPUT:
3280 RETVAL
3281
3282void
3283throw (Coro::State self, SV *exception = &PL_sv_undef)
3284 PROTOTYPE: $;$
3285 CODE:
3286{
3287 struct coro *current = SvSTATE_current;
3288 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3289 SvREFCNT_dec (*exceptionp);
3290 SvGETMAGIC (exception);
3291 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3292}
3293
3294void
3295api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3296 PROTOTYPE: $;$
3297 C_ARGS: aTHX_ coro, flags
3298
3299SV *
3300has_cctx (Coro::State coro)
3301 PROTOTYPE: $
3302 CODE:
3303 /* maybe manage the running flag differently */
3304 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3305 OUTPUT:
3306 RETVAL
3307
3308int
3309is_traced (Coro::State coro)
3310 PROTOTYPE: $
3311 CODE:
3312 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3313 OUTPUT:
3314 RETVAL
3315
3316UV
3317rss (Coro::State coro)
3318 PROTOTYPE: $
3319 ALIAS:
3320 usecount = 1
3321 CODE:
3322 switch (ix)
3323 {
3324 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3325 case 1: RETVAL = coro->usecount; break;
3326 }
3327 OUTPUT:
3328 RETVAL
3329
3330void
3331force_cctx ()
3332 PROTOTYPE:
3333 CODE:
3334 cctx_current->idle_sp = 0;
3335
3336void
3337swap_defsv (Coro::State self)
3338 PROTOTYPE: $
3339 ALIAS:
3340 swap_defav = 1
3341 CODE:
3342 if (!self->slot)
3343 croak ("cannot swap state with coroutine that has no saved state,");
3344 else
3345 {
3346 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3347 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3348
3349 SV *tmp = *src; *src = *dst; *dst = tmp;
3350 }
3351
3352void
3353cancel (Coro::State self)
3354 CODE:
3355 coro_state_destroy (aTHX_ self);
3356 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3357
3358
3359SV *
3360enable_times (int enabled = enable_times)
3361 CODE:
3362{
3363 RETVAL = boolSV (enable_times);
3364
3365 if (enabled != enable_times)
3366 {
3367 enable_times = enabled;
3368
3369 coro_times_update ();
3370 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3371 }
3372}
3373 OUTPUT:
3374 RETVAL
3375
3376void
3377times (Coro::State self)
3378 PPCODE:
3379{
3380 struct coro *current = SvSTATE (coro_current);
3381
3382 if (expect_false (current == self))
3383 {
3384 coro_times_update ();
3385 coro_times_add (SvSTATE (coro_current));
3386 }
3387
3388 EXTEND (SP, 2);
3389 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3390 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3391
3392 if (expect_false (current == self))
3393 coro_times_sub (SvSTATE (coro_current));
3394}
3395
3396void
3397swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3398 CODE:
3399{
3400 struct coro *current = SvSTATE_current;
3401
3402 if (current == coro)
3403 SWAP_SVS (current);
3404
3405 if (!coro->swap_sv)
3406 coro->swap_sv = newAV ();
3407
3408 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3409 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3410
3411 if (current == coro)
3412 SWAP_SVS (current);
3413}
3414
3415
1139MODULE = Coro::State PACKAGE = Coro 3416MODULE = Coro::State PACKAGE = Coro
1140 3417
1141BOOT: 3418BOOT:
1142{ 3419{
1143 int i; 3420 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3421 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3422 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3423 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3424 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3425 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3426 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3427 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3428 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1144 3429
3430 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3431 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3432 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3433 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3434
1145 coro_stash = gv_stashpv ("Coro", TRUE); 3435 coro_stash = gv_stashpv ("Coro", TRUE);
1146 3436
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3437 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3438 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3439 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3440 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3441 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3442 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1153
1154 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158 coro_ready[i] = newAV ();
1159 3443
1160 { 3444 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 3445 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1162 3446
1163 coroapi.schedule = api_schedule; 3447 coroapi.schedule = api_schedule;
3448 coroapi.schedule_to = api_schedule_to;
1164 coroapi.cede = api_cede; 3449 coroapi.cede = api_cede;
3450 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 3451 coroapi.ready = api_ready;
3452 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 3453 coroapi.nready = coro_nready;
1167 coroapi.current = coro_current; 3454 coroapi.current = coro_current;
1168 3455
1169 GCoroAPI = &coroapi; 3456 /*GCoroAPI = &coroapi;*/
1170 sv_setiv (sv, (IV)&coroapi); 3457 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 3458 SvREADONLY_on (sv);
1172 } 3459 }
1173} 3460}
1174 3461
3462SV *
3463async (...)
3464 PROTOTYPE: &@
3465 CODE:
3466 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3467 api_ready (aTHX_ RETVAL);
3468 OUTPUT:
3469 RETVAL
3470
3471void
3472terminate (...)
3473 CODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3475
3476void
3477schedule (...)
3478 CODE:
3479 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3480
3481void
3482schedule_to (...)
3483 CODE:
3484 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3485
3486void
3487cede_to (...)
3488 CODE:
3489 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3490
3491void
3492cede (...)
3493 CODE:
3494 CORO_EXECUTE_SLF_XS (slf_init_cede);
3495
3496void
3497cede_notself (...)
3498 CODE:
3499 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3500
3501void
3502_set_current (SV *current)
3503 PROTOTYPE: $
3504 CODE:
3505 SvREFCNT_dec (SvRV (coro_current));
3506 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3507
3508void
3509_set_readyhook (SV *hook)
3510 PROTOTYPE: $
3511 CODE:
3512 SvREFCNT_dec (coro_readyhook);
3513 SvGETMAGIC (hook);
3514 if (SvOK (hook))
3515 {
3516 coro_readyhook = newSVsv (hook);
3517 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3518 }
3519 else
3520 {
3521 coro_readyhook = 0;
3522 CORO_READYHOOK = 0;
3523 }
3524
1175int 3525int
1176prio (Coro::State coro, int newprio = 0) 3526prio (Coro::State coro, int newprio = 0)
3527 PROTOTYPE: $;$
1177 ALIAS: 3528 ALIAS:
1178 nice = 1 3529 nice = 1
1179 CODE: 3530 CODE:
1180{ 3531{
1181 RETVAL = coro->prio; 3532 RETVAL = coro->prio;
1182 3533
1183 if (items > 1) 3534 if (items > 1)
1184 { 3535 {
1185 if (ix) 3536 if (ix)
1186 newprio += coro->prio; 3537 newprio = coro->prio - newprio;
1187 3538
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3539 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3540 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1190 3541
1191 coro->prio = newprio; 3542 coro->prio = newprio;
1192 } 3543 }
1193} 3544}
3545 OUTPUT:
3546 RETVAL
1194 3547
1195void 3548SV *
1196ready (SV *self) 3549ready (SV *self)
1197 PROTOTYPE: $ 3550 PROTOTYPE: $
1198 CODE: 3551 CODE:
1199 api_ready (self); 3552 RETVAL = boolSV (api_ready (aTHX_ self));
3553 OUTPUT:
3554 RETVAL
1200 3555
1201int 3556int
1202nready (...) 3557nready (...)
1203 PROTOTYPE: 3558 PROTOTYPE:
1204 CODE: 3559 CODE:
1205 RETVAL = coro_nready; 3560 RETVAL = coro_nready;
1206 OUTPUT: 3561 OUTPUT:
1207 RETVAL 3562 RETVAL
1208 3563
1209MODULE = Coro::State PACKAGE = Coro::AIO 3564void
3565suspend (Coro::State self)
3566 PROTOTYPE: $
3567 CODE:
3568 self->flags |= CF_SUSPENDED;
3569
3570void
3571resume (Coro::State self)
3572 PROTOTYPE: $
3573 CODE:
3574 self->flags &= ~CF_SUSPENDED;
3575
3576void
3577_pool_handler (...)
3578 CODE:
3579 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3580
3581void
3582async_pool (SV *cv, ...)
3583 PROTOTYPE: &@
3584 PPCODE:
3585{
3586 HV *hv = (HV *)av_pop (av_async_pool);
3587 AV *av = newAV ();
3588 SV *cb = ST (0);
3589 int i;
3590
3591 av_extend (av, items - 2);
3592 for (i = 1; i < items; ++i)
3593 av_push (av, SvREFCNT_inc_NN (ST (i)));
3594
3595 if ((SV *)hv == &PL_sv_undef)
3596 {
3597 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3598 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3599 SvREFCNT_dec (sv);
3600 }
3601
3602 {
3603 struct coro *coro = SvSTATE_hv (hv);
3604
3605 assert (!coro->invoke_cb);
3606 assert (!coro->invoke_av);
3607 coro->invoke_cb = SvREFCNT_inc (cb);
3608 coro->invoke_av = av;
3609 }
3610
3611 api_ready (aTHX_ (SV *)hv);
3612
3613 if (GIMME_V != G_VOID)
3614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3615 else
3616 SvREFCNT_dec (hv);
3617}
1210 3618
1211SV * 3619SV *
1212_get_state () 3620rouse_cb ()
3621 PROTOTYPE:
1213 CODE: 3622 CODE:
1214{ 3623 RETVAL = coro_new_rouse_cb (aTHX);
1215 struct {
1216 int errorno;
1217 int laststype;
1218 int laststatval;
1219 Stat_t statcache;
1220 } data;
1221
1222 data.errorno = errno;
1223 data.laststype = PL_laststype;
1224 data.laststatval = PL_laststatval;
1225 data.statcache = PL_statcache;
1226
1227 RETVAL = newSVpvn ((char *)&data, sizeof data);
1228}
1229 OUTPUT: 3624 OUTPUT:
1230 RETVAL 3625 RETVAL
1231 3626
1232void 3627void
1233_set_state (char *data_) 3628rouse_wait (...)
3629 PROTOTYPE: ;$
3630 PPCODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3632
3633void
3634on_enter (SV *block)
3635 ALIAS:
3636 on_leave = 1
1234 PROTOTYPE: $ 3637 PROTOTYPE: &
1235 CODE: 3638 CODE:
1236{ 3639{
1237 struct { 3640 struct coro *coro = SvSTATE_current;
3641 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3642
3643 block = s_get_cv_croak (block);
3644
3645 if (!*avp)
3646 *avp = newAV ();
3647
3648 av_push (*avp, SvREFCNT_inc (block));
3649
3650 if (!ix)
3651 on_enterleave_call (aTHX_ block);
3652
3653 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3654 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3655 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3656}
3657
3658
3659MODULE = Coro::State PACKAGE = PerlIO::cede
3660
3661BOOT:
3662 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3663
3664
3665MODULE = Coro::State PACKAGE = Coro::Semaphore
3666
3667SV *
3668new (SV *klass, SV *count = 0)
3669 CODE:
3670{
3671 int semcnt = 1;
3672
3673 if (count)
3674 {
3675 SvGETMAGIC (count);
3676
3677 if (SvOK (count))
3678 semcnt = SvIV (count);
3679 }
3680
3681 RETVAL = sv_bless (
3682 coro_waitarray_new (aTHX_ semcnt),
3683 GvSTASH (CvGV (cv))
3684 );
3685}
3686 OUTPUT:
3687 RETVAL
3688
3689# helper for Coro::Channel and others
3690SV *
3691_alloc (int count)
3692 CODE:
3693 RETVAL = coro_waitarray_new (aTHX_ count);
3694 OUTPUT:
3695 RETVAL
3696
3697SV *
3698count (SV *self)
3699 CODE:
3700 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3701 OUTPUT:
3702 RETVAL
3703
3704void
3705up (SV *self, int adjust = 1)
3706 ALIAS:
3707 adjust = 1
3708 CODE:
3709 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3710
3711void
3712down (...)
3713 CODE:
3714 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3715
3716void
3717wait (...)
3718 CODE:
3719 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3720
3721void
3722try (SV *self)
3723 PPCODE:
3724{
3725 AV *av = (AV *)SvRV (self);
3726 SV *count_sv = AvARRAY (av)[0];
3727 IV count = SvIVX (count_sv);
3728
3729 if (count > 0)
3730 {
3731 --count;
3732 SvIVX (count_sv) = count;
3733 XSRETURN_YES;
3734 }
3735 else
3736 XSRETURN_NO;
3737}
3738
3739void
3740waiters (SV *self)
3741 PPCODE:
3742{
3743 AV *av = (AV *)SvRV (self);
3744 int wcount = AvFILLp (av) + 1 - 1;
3745
3746 if (GIMME_V == G_SCALAR)
3747 XPUSHs (sv_2mortal (newSViv (wcount)));
3748 else
3749 {
1238 int errorno; 3750 int i;
1239 int laststype; 3751 EXTEND (SP, wcount);
1240 int laststatval; 3752 for (i = 1; i <= wcount; ++i)
1241 Stat_t statcache; 3753 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1242 } *data = (void *)data_; 3754 }
1243
1244 errno = data->errorno;
1245 PL_laststype = data->laststype;
1246 PL_laststatval = data->laststatval;
1247 PL_statcache = data->statcache;
1248} 3755}
3756
3757MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3758
3759void
3760_may_delete (SV *sem, int count, int extra_refs)
3761 PPCODE:
3762{
3763 AV *av = (AV *)SvRV (sem);
3764
3765 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3766 && AvFILLp (av) == 0 /* no waiters, just count */
3767 && SvIV (AvARRAY (av)[0]) == count)
3768 XSRETURN_YES;
3769
3770 XSRETURN_NO;
3771}
3772
3773MODULE = Coro::State PACKAGE = Coro::Signal
3774
3775SV *
3776new (SV *klass)
3777 CODE:
3778 RETVAL = sv_bless (
3779 coro_waitarray_new (aTHX_ 0),
3780 GvSTASH (CvGV (cv))
3781 );
3782 OUTPUT:
3783 RETVAL
3784
3785void
3786wait (...)
3787 CODE:
3788 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3789
3790void
3791broadcast (SV *self)
3792 CODE:
3793{
3794 AV *av = (AV *)SvRV (self);
3795 coro_signal_wake (aTHX_ av, AvFILLp (av));
3796}
3797
3798void
3799send (SV *self)
3800 CODE:
3801{
3802 AV *av = (AV *)SvRV (self);
3803
3804 if (AvFILLp (av))
3805 coro_signal_wake (aTHX_ av, 1);
3806 else
3807 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3808}
3809
3810IV
3811awaited (SV *self)
3812 CODE:
3813 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3814 OUTPUT:
3815 RETVAL
3816
3817
3818MODULE = Coro::State PACKAGE = Coro::AnyEvent
3819
3820BOOT:
3821 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3822
3823void
3824_schedule (...)
3825 CODE:
3826{
3827 static int incede;
3828
3829 api_cede_notself (aTHX);
3830
3831 ++incede;
3832 while (coro_nready >= incede && api_cede (aTHX))
3833 ;
3834
3835 sv_setsv (sv_activity, &PL_sv_undef);
3836 if (coro_nready >= incede)
3837 {
3838 PUSHMARK (SP);
3839 PUTBACK;
3840 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3841 }
3842
3843 --incede;
3844}
3845
3846
3847MODULE = Coro::State PACKAGE = Coro::AIO
3848
3849void
3850_register (char *target, char *proto, SV *req)
3851 CODE:
3852{
3853 SV *req_cv = s_get_cv_croak (req);
3854 /* newXSproto doesn't return the CV on 5.8 */
3855 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3856 sv_setpv ((SV *)slf_cv, proto);
3857 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3858}
3859
3860MODULE = Coro::State PACKAGE = Coro::Select
3861
3862void
3863patch_pp_sselect ()
3864 CODE:
3865 if (!coro_old_pp_sselect)
3866 {
3867 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3868 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3869 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3870 }
3871
3872void
3873unpatch_pp_sselect ()
3874 CODE:
3875 if (coro_old_pp_sselect)
3876 {
3877 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3878 coro_old_pp_sselect = 0;
3879 }
3880

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